Patent Publication Number: US-2022240252-A1

Title: Enhancements on transmissions with partial-interlace assignment

Description:
CROSS REFERENCES 
     The present Application for Patent is a Divisional of U.S. patent application Ser. No. 16/374,593 by TIAN et al., entitled “ENHANCEMENTS ON TRANSMISSIONS WITH PARTIAL-INTERLACE ASSIGNMENT” filed Apr. 3, 2019, which claims benefit of India Provisional Patent Application No. 201841013239 by TIAN et al., entitled “ENHANCEMENTS ON TRANSMISSIONS WITH PARTIAL-INTERLACE ASSIGNMENT,” filed Apr. 6, 2018, assigned to the assignee hereof, and expressly incorporated by reference in its entirety. 
    
    
     BACKGROUND 
     The following relates generally to wireless communications, and more specifically to enhancements on transmissions with partial-interlace assignment. 
     Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code-division multiple access (CDMA), time-division multiple access (TDMA), frequency-division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), or discrete Fourier transform-spread orthogonal frequency-division multiplexing (DFT-s-OFDM). A wireless multiple-access communications system may include a number of base stations or network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE). 
     In some cases, a UE may be configured for autonomous uplink (AUL) transmissions and allocated resources for the AUL transmissions occupying a partial  channel bandwidth. UEs allocated the partial channel bandwidth for AUL transmission may be configured with a same starting offset value at which the UEs may begin transmitting. In such cases, the total number of UEs that may transmit AUL transmissions during one AUL subframe may be limited to the total number of orthogonal interlaces in the AUL subframe. Further, if one of the UEs does not have data to transmit in the AUL subframe, its allocated interlace may be unused for that AUL subframe when another UE may have been able to use the same resources to transmit data. 
     SUMMARY 
     The described techniques relate to improved methods, systems, devices, or apparatuses that support partial-interlace transmission techniques for autonomous uplink (AUL) transmissions. Generally, the described techniques provide for a base station transmitting to a user equipment (UE) a partial bandwidth configuration for uplink transmissions. The partial bandwidth configuration may indicate a channel interlace and a portion of a channel bandwidth, for example, for AUL transmissions. The base station may also transmit to the UE an AUL configuration including a group identifier. The UE may determine a starting offset with respect to an AUL subframe for a partial bandwidth transmission based on the group identifier. In some cases, different UEs may be grouped into groups of UEs allocated non-overlapping resources such that UEs allocated overlapping resources may have different starting offsets at which to begin transmitting. The UE may perform the partial bandwidth transmission, according to the determined starting offset, over the channel interlace and the portion of the channel bandwidth. 
     A method of wireless communication is described. The method may include receiving a partial bandwidth configuration for uplink transmissions by a UE, where the partial bandwidth configuration may indicate a channel interlace and a portion of a channel bandwidth. The method may include receiving an AUL configuration including a group identifier, determining a starting offset with respect to an AUL subframe for a partial bandwidth transmission by the UE based at least in part on the group identifier, and performing the partial bandwidth transmission according to the determined starting offset over the channel interlace and the portion of the channel bandwidth.  
     An apparatus for wireless communication is described. The apparatus may include means for receiving a partial bandwidth configuration for uplink transmissions by a UE, where the partial bandwidth configuration may indicate a channel interlace and a portion of a channel bandwidth. The apparatus may include means for means for receiving an AUL configuration including a group identifier, means for determining a starting offset with respect to an AUL subframe for a partial bandwidth transmission by the UE based at least in part on the group identifier, and means for performing the partial bandwidth transmission according to the determined starting offset over the channel interlace and the portion of the channel bandwidth. 
     Another apparatus for wireless communication is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be operable to cause the processor to receive a partial bandwidth configuration for uplink transmissions by a UE, where the partial bandwidth configuration may indicate a channel interlace and a portion of a channel bandwidth. The instructions may be operable to cause the processor to receive an AUL configuration including a group identifier, determine a starting offset with respect to an AUL subframe for a partial bandwidth transmission by the UE based at least in part on the group identifier, and perform the partial bandwidth transmission according to the determined starting offset over the channel interlace and the portion of the channel bandwidth. 
     A non-transitory computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include instructions operable to cause a processor to receive a partial bandwidth configuration for uplink transmissions by a UE, where the partial bandwidth configuration may indicate a channel interlace and a portion of a channel bandwidth. The non-transitory computer-readable medium may include instructions operable to cause the processor to receive an AUL configuration including a group identifier, determine a starting offset with respect to an AUL subframe for a partial bandwidth transmission by the UE based at least in part on the group identifier, and perform the partial bandwidth transmission according to the determined starting offset over the channel interlace and the portion of the channel bandwidth.  
     In some examples of the method, apparatus, and non-transitory computer-readable medium described above, determining the starting offset may include selecting the starting offset from a set of defined starting offset values. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, selecting the starting offset may include randomly selecting the starting offset from the set of defined starting offset values. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, randomly selecting the starting offset may be based at least in part on one or more of: the group identifier for the UE or a slot number of the AUL subframe for the partial bandwidth transmission by the UE. 
     In some examples of the method, apparatus, and non-transitory computer-readable medium described above, selecting the starting offset may be based at least in part on whether the partial bandwidth transmission of the UE is inside of a maximum channel occupancy time (MCOT). In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the group identifier may be associated with one or more UEs having non-overlapping resource allocations. 
     Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for performing a per-interlace listen-before-talk (LBT) procedure by measuring an energy level of at least the portion of the channel interlace based at least in part on the received partial bandwidth configuration. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining an availability of at least the portion of the channel interlace based at least in part on the per-interlace LBT procedure. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for transmitting over the channel interlace based at least in part on the determined availability. 
     A method of wireless communication is described. The method may include transmitting, to a first UE of a first group of one or more UEs, a first partial bandwidth configuration, where the first partial bandwidth configuration may indicate a first channel interlace and a first portion of a channel bandwidth. The method may include  transmitting to the first UE a first AUL configuration including a first group identifier and receiving a first partial bandwidth transmission from the first UE at a first starting offset with respect to an AUL subframe, where the first starting offset is based at least in part on the first group identifier. 
     An apparatus for wireless communication is described. The apparatus may include means for transmitting, to a first UE of a first group of one or more UEs, a first partial bandwidth configuration, where the first partial bandwidth configuration may indicate a first channel interlace and a first portion of a channel bandwidth. The apparatus may include means for transmitting to the first UE a first AUL configuration including a first group identifier and means for receiving a first partial bandwidth transmission from the first UE at a first starting offset with respect to an AUL subframe, where the first starting offset may be based at least in part on the first group identifier. 
     Another apparatus for wireless communication is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be operable to cause the processor to transmit, to a first UE of a first group of one or more UEs, a first partial bandwidth configuration, where the first partial bandwidth configuration may indicate a first channel interlace and a first portion of a channel bandwidth. The instructions may be operable to cause the processor to transmit to the first UE a first AUL configuration including a first group identifier and receive a first partial bandwidth transmission from the first UE at a first starting offset with respect to an AUL subframe, where the first starting offset may be based at least in part on the first group identifier. 
     A non-transitory computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include instructions operable to cause a processor to transmit, to a first UE of a first group of one or more UEs, a first partial bandwidth configuration, where the first partial bandwidth configuration may indicate a first channel interlace and a first portion of a channel bandwidth. The non-transitory computer-readable medium may include instructions operable to cause the processor to transmit to the first UE a first AUL configuration including a first group identifier and receive a first partial bandwidth transmission from the first UE at a first starting offset with respect to an AUL subframe, where the first starting offset may be based at least in part on the first group identifier.  
     Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for receiving a second partial bandwidth transmission from a second UE of the first group of one or more UEs, where the second partial bandwidth transmission may be received at the first starting offset with respect to the AUL subframe. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for transmitting to the second UE a second partial bandwidth configuration, the second partial bandwidth configuration indicating a second channel interlace and the first portion of the channel bandwidth, where the second partial bandwidth transmission may be received over the second channel interlace and the first portion of the channel bandwidth. 
     Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for transmitting a second AUL configuration to the second UE, where the second AUL configuration may include the first group identifier. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the first starting offset may be from a set of defined starting offset values. 
     Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining the first AUL configuration based at least in part on the first partial bandwidth configuration. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the first group of one or more UEs may include UEs assigned to non-overlapping channel interlaces. 
     Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for receiving a second partial bandwidth transmission from a second UE of a second group of one or more UEs, where the second partial bandwidth transmission may be received at a second starting offset with respect to the AUL subframe. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for transmitting to the second UE a second AUL configuration including a second group  identifier for the second UE, where the second starting offset may be based at least in part on the second group identifier. 
     A method of wireless communication is described. The method may include receiving a channel interlace configuration for transmissions by a UE in a shared radio frequency spectrum band and performing a per-interlace LBT procedure by measuring an energy level of at least a portion of a channel interlace of the shared radio frequency spectrum band based at least in part on the received channel interlace configuration. The method may include determining an availability of the channel interlace based at least in part on the per-interlace LBT procedure and transmitting over the channel interlace based at least in part on the determined availability. 
     An apparatus for wireless communication is described. The apparatus may include means for receiving a channel interlace configuration for transmissions by a UE in a shared radio frequency spectrum band and means for performing a per-interlace LBT procedure by measuring an energy level of at least a portion of a channel interlace of the shared radio frequency spectrum band based at least in part on the received channel interlace configuration. The apparatus may include means for determining an availability of the channel interlace based at least in part on the per-interlace LBT procedure and means for transmitting over the channel interlace based at least in part on the determined availability. 
     Another apparatus for wireless communication is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be operable to cause the processor to receive a channel interlace configuration for transmissions by a UE in a shared radio frequency spectrum band and perform a per-interlace LBT procedure by measuring an energy level of at least a portion of a channel interlace of the shared radio frequency spectrum band based at least in part on the received channel interlace configuration. The instructions may be operable to cause the processor to determine an availability of the channel interlace based at least in part on the per-interlace LBT procedure and transmit over the channel interlace based at least in part on the determined availability. 
     A non-transitory computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include instructions  operable to cause a processor to receive a channel interlace configuration for transmissions by a UE in a shared radio frequency spectrum band and perform a per-interlace LBT procedure by measuring an energy level of at least a portion of a channel interlace of the shared radio frequency spectrum band based at least in part on the received channel interlace configuration. The non-transitory computer-readable medium may include instructions operable to cause the processor to determine an availability of the channel interlace based at least in part on the per-interlace LBT procedure and transmit over the channel interlace based at least in part on the determined availability. 
     In some examples of the method, apparatus, and non-transitory computer-readable medium described above, performing the per-interlace LBT procedure may include performing a fast Fourier transform on the measured energy level of at least the portion of the channel interlace. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, performing the per-interlace LBT procedure may include measuring the energy level of a subset of resource elements (REs) of the portion of the channel interlace. 
     In some examples of the method, apparatus, and non-transitory computer-readable medium described above, performing the per-interlace LBT procedure may include receiving an indication of a starting orthogonal frequency-division multiplexing (OFDM) symbol for the UE. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for transmitting a filler signal following the per-interlace LBT procedure and prior to the indicated starting OFDM symbol based at least in part on a result of the per-interlace LBT procedure. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the filler signal may be transmitted using a subset of REs of the portion of the channel interlace. In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the filler signal may include an extended cyclic prefix. 
     Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for determining an energy level of a second channel interlace adjacent to the channel interlace, where the filler signal may be transmitted based at least in part on the energy level of the second channel interlace.  
     In some examples of the method, apparatus, and non-transitory computer-readable medium described above, the channel interlace configuration may include a scheduled uplink (SUL) configuration. Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for performing a full-interlace LBT procedure by measuring an energy level of a full-channel interlace of the shared radio frequency spectrum band. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates an example of a wireless communications system that supports partial-interlace transmission techniques for autonomous uplink (AUL) transmissions in accordance with aspects of the present disclosure. 
         FIG. 2  illustrates an example of a wireless communications system that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. 
         FIG. 3  illustrates an example subframe configuration for a wireless communications system that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. 
         FIG. 4  illustrates an example of a transmission timeline that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. 
         FIGS. 5 and 6  illustrate an example of a process flow in a wireless communications system that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. 
         FIGS. 7 and 8  show block diagrams of a wireless devices that support partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. 
         FIG. 9  shows a block diagram of a user equipment (UE) communications manager that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure.  
         FIG. 10  shows a diagram of a wireless communications system including a wireless device that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. 
         FIGS. 11 and 12  show block diagrams of wireless devices that support partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. 
         FIG. 13  shows a block diagram of a base station communications manager that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. 
         FIG. 14  shows a block diagram of a wireless communications system including a wireless device that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. 
         FIGS. 15 and 16  show block diagram of a wireless device that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. 
         FIG. 17  shows a block diagram of a wireless device communications manager that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. 
         FIG. 18  shows a diagram of a wireless communications system  1800  including a wireless device that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. 
         FIGS. 19 through 23  show flowcharts illustrating methods for partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     A base station and a user equipment (UE) may communicate using uplink transmissions from the UE to the base station and downlink transmissions from the base station to the UE. An uplink transmission may be scheduled by sending the UE an uplink grant, which signals to the UE that it may transmit uplink data on configured or  scheduled resources. In some cases, a UE may have a capability to perform an autonomous uplink (AUL) transmission of uplink data. AUL may refer to the process by which a UE transmits uplink signals to a base station without first receiving an uplink grant. AUL functionality may be configured using, for example, radio resource control (RRC) messaging. 
     In some cases, a UE may be allocated resources occupying a partial channel bandwidth for the AUL transmissions (i.e., UEs configured for AUL transmissions may be allocated resources occupying a particular portion of a bandwidth rather than resources occupying the full radio frequency bandwidth). In some cases, multiple UEs  115  with a partial channel bandwidth allocation for AUL transmission may each be configured with the same starting offset value. In such cases, the total number of UEs that may transmit AUL transmissions during one AUL subframe may be limited to the total number of orthogonal interlaces in the AUL subframe, and a resource utilization efficiency may be relatively lower. Further, if one of the UEs  115  does not have data to transmit in the AUL subframe, the interlace allocated to the UE  115  may be unused for that AUL subframe when another UE may have been able to use the same resources to transmit data. Group-based starting offset values for partial-interlace assigned UEs  115  may provide for other UEs assigned a later starting offset value for AUL transmission to make use of resources left unused by a first, earlier assigned, group of UE. 
     For example, a base station and a first UE may establish a first connection and the base station and a second UE may establish a second connection. The first UE and the second UE may be assigned to respective first and second groups of UEs. The base station may transmit a group identifier to the each UE of the first and second groups of UEs, where each group of UEs is made of up UEs assigned non-overlapping resources. Based on the group identifiers, the UEs of each of the first and second groups of UEs may determine group-based starting offset values for AUL transmissions. The UEs may select its starting offset value (e.g., randomly) from a set of defined starting offset values for AUL transmissions as a function of the group identifier received from the base station, for example, in an AUL configuration. In this context, the term “randomly” may include the use of a pseudorandom selection mechanism or algorithm. In this way, the base station may group UEs located within its coverage area into multiple groups, where each group of UEs, as identified by its corresponding group identifier, may transmit according to a unique starting offset value. Each UE of the first  group of UEs may transmit together at a first time according to a first starting offset value, and each UE of the second group of UEs may transmit together at a second time according to a second starting offset value. Thus, as each UE of each group is allocated non-overlapping resources within its respective group of UEs, no two UEs block each other by transmitting on the same frequency resources at the same time. 
     Further, group-based starting offset values for partial-interlace assigned UEs may provide relatively increased utilization of the medium when groups of UEs having earlier-assigned starting offset values do not have data to transmit and thus allowing later-assigned UEs to utilize the same resources to transmit data. In some cases, however, a UE employing a full-bandwidth listen-before-talk (LBT) procedure may detect transmissions from other UEs across all interlaces rather than only the particular interlace on which the UE is to transmit, and thus the transmission of an earlier-transmitting UE may unnecessarily block the later-transmitting UE. Therefore, the later-transmitting UE may perform a per-interlace LBT procedure in which the UE measures the energy of its assigned interlace rather than a full bandwidth, so as not to be unnecessarily blocked from transmitting. 
     Aspects of the disclosure are initially described in the context of a wireless communications system. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to partial-interlace transmission techniques for AUL transmissions. 
       FIG. 1  illustrates an example of a wireless communications system  100  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The wireless communications system  100  includes base stations  105 , UEs  115 , and a core network  130 . In some examples, the wireless communications system  100  may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some cases, wireless communications system  100  may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, or communications with low-cost and low-complexity devices. 
     Base stations  105  may wirelessly communicate with UEs  115  via one or more base station antennas. Base stations  105  described herein may include or may be referred to by those skilled in the art as a base transceiver station, a radio base station,  an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generation Node B or giga-nodeB (either of which may be referred to as a gNB), a Home NodeB, a Home eNodeB, or some other suitable terminology. Wireless communications system  100  may include base stations  105  of different types (e.g., macro or small cell base stations). The UEs  115  described herein may be able to communicate with various types of base stations  105  and network equipment including macro eNBs, small cell eNBs, gNBs, relay base stations, and the like. 
     Each base station  105  may be associated with a particular geographic coverage area  110  in which communications with various UEs  115  is supported. Each base station  105  may provide communication coverage for a respective geographic coverage area  110  via communication links  125 , and communication links  125  between a base station  105  and a UE  115  may utilize one or more carriers. Communication links  125  shown in wireless communications system  100  may include uplink transmissions from a UE  115  to a base station  105 , or downlink transmissions from a base station  105  to a UE  115 . Downlink transmissions may also be called forward link transmissions while uplink transmissions may also be called reverse link transmissions. 
     The geographic coverage area  110  for a base station  105  may be divided into sectors making up only a portion of the geographic coverage area  110 , and each sector may be associated with a cell. For example, each base station  105  may provide communication coverage for a macro cell, a small cell, a hot spot, or other types of cells, or various combinations thereof. In some examples, a base station  105  may be movable and therefore provide communication coverage for a moving geographic coverage area  110 . In some examples, different geographic coverage areas  110  associated with different technologies may overlap, and overlapping geographic coverage areas  110  associated with different technologies may be supported by the same base station  105  or by different base stations  105 . The wireless communications system  100  may include, for example, a heterogeneous LTE/LTE-A/LTE-A Pro or NR network in which different types of base stations  105  provide coverage for various geographic coverage areas  110 . 
     The term “cell” refers to a logical communication entity used for communication with a base station  105  (e.g., over a carrier), and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID),  a virtual cell identifier (VCID)) operating via the same or a different carrier. In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., machine-type communication (MTC), narrowband Internet-of-Things (NB-IoT), enhanced mobile broadband (eMBB), or others) that may provide access for different types of devices. In some cases, the term “cell” may refer to a portion of a geographic coverage area  110  (e.g., a sector) over which the logical entity operates. 
     UEs  115  may be dispersed throughout the wireless communications system  100 , and each UE  115  may be stationary or mobile. A UE  115  may also be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client. A UE  115  may also be a personal electronic device such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, a UE  115  may also refer to a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or an MTC device, or the like, which may be implemented in various articles such as appliances, vehicles, meters, or the like. 
     Some UEs  115 , such as MTC or IoT devices, may be low cost or low complexity devices, and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication). M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a base station  105  without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay that information to a central server or application program that can make use of the information or present the information to humans interacting with the program or application. Some UEs  115  may be designed to collect information or enable automated behavior of machines. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.  
     Some UEs  115  may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously). In some examples half-duplex communications may be performed at a reduced peak rate. Other power conservation techniques for UEs  115  include entering a power saving “deep sleep” mode when not engaging in active communications, or operating over a limited bandwidth (e.g., according to narrowband communications). In some cases, UEs  115  may be designed to support critical functions (e.g., mission critical functions), and a wireless communications system  100  may be configured to provide ultra-reliable communications for these functions. 
     In some cases, a UE  115  may also be able to communicate directly with other UEs  115  (e.g., using a peer-to-peer (P2P) or device-to-device (D2D) protocol). One or more of a group of UEs  115  utilizing D2D communications may be within the geographic coverage area  110  of a base station  105 . Other UEs  115  in such a group may be outside the geographic coverage area  110  of a base station  105 , or be otherwise unable to receive transmissions from a base station  105 . In some cases, groups of UEs  115  communicating via D2D communications may utilize a one-to-many (1:M) system in which each UE  115  transmits to every other UE  115  in the group. In some cases, a base station  105  facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between UEs  115  without the involvement of a base station  105 . 
     Base stations  105  may communicate with the core network  130  and with one another. For example, base stations  105  may interface with the core network  130  through backhaul links  132  (e.g., via an S1 or other interface). Base stations  105  may communicate with one another over backhaul links  134  (e.g., via an X2 or other interface) either directly (e.g., directly between base stations  105 ) or indirectly (e.g., via core network  130 ). 
     The core network  130  may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network  130  may be an evolved packet core (EPC), which may include at least one mobility management entity (MME), at least one serving gateway (S-GW), and at least one Packet Data Network (PDN) gateway (P-GW). The MME may  manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management for UEs  115  served by base stations  105  associated with the EPC. User IP packets may be transferred through the S-GW, which itself may be connected to the P-GW. The P-GW may provide IP address allocation as well as other functions. The P-GW may be connected to the network operators IP services. The operators IP services may include access to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or a Packet-Switched (PS) Streaming Service. 
     At least some of the network devices, such as a base station  105 , may include subcomponents such as an access network entity, which may be an example of an access node controller (ANC). Each access network entity may communicate with UEs  115  through a number of other access network transmission entities, which may be referred to as a radio head, a smart radio head, or a transmission/reception point (TRP). In some configurations, various functions of each access network entity or base station  105  may be distributed across various network devices (e.g., radio heads and access network controllers) or consolidated into a single network device (e.g., a base station  105 ). 
     The wireless communications system  100  may operate using one or more frequency bands, typically in the range of 300 MHz to 300 GHz. Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band, since the wavelengths range from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features. However, the waves may penetrate structures sufficiently for a macro cell to provide service to UEs  115  located indoors. Transmission of UHF waves may be associated with smaller antennas and shorter range (e.g., less than 100 km) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz. 
     The wireless communications system  100  may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band. The SHF region includes bands such as the 5 GHz industrial, scientific, and medical (ISM) bands, which may be used opportunistically by devices that can tolerate interference from other users.  
     The wireless communications system  100  may also operate in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz), also known as the millimeter band. In some examples, the wireless communications system  100  may support millimeter wave (mmW) communications between UEs  115  and base stations  105 , and EHF antennas of the respective devices may be even smaller and more closely spaced than UHF antennas. In some cases, this may facilitate use of antenna arrays within a UE  115 . However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. Techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body. 
     In some cases, the wireless communications system  100  may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communications system  100  may employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz ISM band. When operating in unlicensed radio frequency spectrum bands, wireless devices such as base stations  105  and UEs  115  may employ a channel access procedure, such as a clear channel assessment (CCA) procedure, a LBT procedure, and the like. A LBT procedures to ensure a frequency channel is clear before transmitting data. The channel access procedure may allow the wireless device to capture the channel for a transmission opportunity, such as a maximum channel occupancy time (MCOT), a Wi-Fi transmission opportunity (TXOP), and the like. In some instances, the wireless device may share a portion of the transmission opportunity. For example, a UE may capture the shared channel for a transmission opportunity to be used for AUL. 
     In some cases, operations in unlicensed bands may be based on a CA configuration in conjunction with CCs operating in a licensed band (e.g., LAA). Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these. Duplexing in unlicensed spectrum may be based on frequency-division duplexing (FDD), time-division duplexing (TDD), or a combination of both. In some cases, a UE  115  may perform an LBT procedure prior to performing an AUL transmission.  
     In some examples, base station  105  or UE  115  may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. For example, the wireless communications system  100  may use a transmission scheme between a transmitting device (e.g., a base station  105 ) and a receiving device (e.g., a UE  115 ), where the transmitting device is equipped with multiple antennas and the receiving devices are equipped with one or more antennas. MIMO communications may employ multipath signal propagation to increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream, and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams. Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO) where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) where multiple spatial layers are transmitted to multiple devices. 
     Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station  105  or a UE  115 ) to shape or steer an antenna beam (e.g., a transmit beam or receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying certain amplitude and phase offsets to signals carried via each of the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the  antenna array of the transmitting device or receiving device, or with respect to some other orientation). 
     In one example, a base station  105  may use multiple antennas or antenna arrays to conduct beamforming operations for directional communications with a UE  115 . For instance, some signals (e.g. synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a base station  105  multiple times in different directions, which may include a signal being transmitted according to different beamforming weight sets associated with different directions of transmission. Transmissions in different beam directions may be used to identify (e.g., by the base station  105  or a receiving device, such as a UE  115 ) a beam direction for subsequent transmission and/or reception by the base station  105 . Some signals, such as data signals associated with a particular receiving device, may be transmitted by a base station  105  in a single beam direction (e.g., a direction associated with the receiving device, such as a UE  115 ). In some examples, the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted in different beam directions. For example, a UE  115  may receive one or more of the signals transmitted by the base station  105  in different directions, and the UE  115  may report to the base station  105  an indication of the signal it received with a highest signal quality, or an otherwise acceptable signal quality. Although these techniques are described with reference to signals transmitted in one or more directions by a base station  105 , a UE  115  may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE  115 ), or transmitting a signal in a single direction (e.g., for transmitting data to a receiving device). 
     A receiving device (e.g., a UE  115 , which may be an example of a mmW receiving device) may try multiple receive beams when receiving various signals from the base station  105 , such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets applied to signals received at a plurality of antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at a plurality of antenna  elements of an antenna array, any of which may be referred to as “listening” according to different receive beams or receive directions. In some examples a receiving device may use a single receive beam to receive along a single beam direction (e.g., when receiving a data signal). The single receive beam may be aligned in a beam direction determined based on listening according to different receive beam directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio, or otherwise acceptable signal quality on listening according to multiple beam directions). 
     In some cases, the antennas of a base station  105  or UE  115  may be located within one or more antenna arrays, which may support MIMO operations, or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some cases, antennas or antenna arrays associated with a base station  105  may be located in diverse geographic locations. A base station  105  may have an antenna array with a number of rows and columns of antenna ports that the base station  105  may use to support beamforming of communications with a UE  115 . Likewise, a UE  115  may have one or more antenna arrays that may support various MIMO or beamforming operations. 
     In some cases, the wireless communications system  100  may be a packet-based network that operate according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. A Radio Link Control (RLC) layer may in some cases perform packet segmentation and reassembly to communicate over logical channels. A Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer may also use hybrid automatic repeat request (HARQ) to provide retransmission at the MAC layer to improve link efficiency. In the control plane, the RRC protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE  115  and a base station  105  or core network  130  supporting radio bearers for user plane data. At the Physical (PHY) layer, transport channels may be mapped to physical channels. 
     In some cases, UEs  115  and base stations  105  may support retransmissions of data to increase the likelihood that data is received successfully. HARQ feedback is one technique of increasing the likelihood that data is received correctly over a  communication link  125 . HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., signal-to-noise conditions). In some cases, a wireless device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval. 
     Time intervals in LTE or NR may be expressed in multiples of a basic time unit, which may, for example, refer to a sampling period of T s =1/30,720,000 seconds. Time intervals of a communications resource may be organized according to radio frames each having a duration of 10 milliseconds (ms), where the frame period may be expressed as T f =307,200 T s . The radio frames may be identified by a system frame number (SFN) ranging from 0 to 1023. Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms. A subframe may be further divided into 2 slots each having a duration of 0.5 ms, and each slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). Excluding the cyclic prefix, each symbol period may contain 2048 sampling periods. In some cases, a subframe may be the smallest scheduling unit of the wireless communications system  100 , and may be referred to as a transmission time interval (TTI). In other cases, a smallest scheduling unit of the wireless communications system  100  may be shorter than a subframe or may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) or in selected component carriers using sTTIs). 
     In some wireless communications systems, a slot may further be divided into multiple mini-slots containing one or more symbols. In some instances, a symbol of a mini-slot or a mini-slot may be the smallest unit of scheduling. Each symbol may vary in duration depending on the subcarrier spacing or frequency band of operation, for example. Further, some wireless communications systems may implement slot aggregation in which multiple slots or mini-slots are aggregated together and used for communication between a UE  115  and a base station  105 .  
     The term “carrier” refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications over a communication link  125 . For example, a carrier of a communication link  125  may include a portion of a radio frequency spectrum band that is operated according to physical layer channels for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. A carrier may be associated with a pre-defined frequency channel (e.g., an Evolved Universal Terrestrial Radio Access (UTRA) (E-UTRA) absolute radio frequency channel number (EARFCN)), and may be positioned according to a channel raster for discovery by UEs  115 . Carriers may be downlink or uplink (e.g., in an FDD mode), or be configured to carry downlink and uplink communications (e.g., in a TDD mode). In some examples, signal waveforms transmitted over a carrier may be made up of multiple sub-carriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency-division multiplexing (OFDM) or discrete Fourier transform-spread OFDM (DFT-s-OFDM). 
     The organizational structure of the carriers may be different for different radio access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR, etc.). For example, communications over a carrier may be organized according to TTIs or slots, each of which may include user data as well as control information or signaling to support decoding the user data. A carrier may also include dedicated acquisition signaling (e.g., synchronization signals or system information, etc.) and control signaling that coordinates operation for the carrier. In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers. 
     Physical channels may be multiplexed on a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using time-division multiplexing (TDM) techniques, frequency-division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. In some examples, control information transmitted in a physical control channel may be distributed between different control regions in a cascaded manner (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces).  
     A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system  100 . For example, the carrier bandwidth may be one of a number of predetermined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). In some examples, each served UE  115  may be configured for operating over portions or all of the carrier bandwidth. In other examples, some UEs  115  may be configured for operation using a narrowband protocol type that is associated with a predefined portion or range (e.g., set of subcarriers or RBs) within a carrier (e.g., “in-band” deployment of a narrowband protocol type). 
     In a system employing MCM techniques, a resource element may include one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme). Thus, the more resource elements that a UE  115  receives and the higher the order of the modulation scheme, the higher the data rate may be for the UE  115 . In MIMO systems, a wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers), and the use of multiple spatial layers may further increase the data rate for communications with a UE  115 . 
     Devices of the wireless communications system  100  (e.g., base stations  105  or UEs  115 ) may have a hardware configuration that supports communications over a particular carrier bandwidth, or may be configurable to support communications over one of a set of carrier bandwidths. In some examples, the wireless communications system  100  may include base stations  105  and/or UEs that can support simultaneous communications via carriers associated with more than one different carrier bandwidth. 
     The wireless communications system  100  may support communication with a UE  115  on multiple cells or carriers, a feature which may be referred to as carrier aggregation (CA) or multi-carrier operation. A UE  115  may be configured with multiple downlink CCs and one or more uplink CCs according to a carrier aggregation configuration. Carrier aggregation may be used with both FDD and TDD component carriers.  
     In some cases, the wireless communications system  100  may utilize enhanced component carriers (eCCs). An eCC may be characterized by one or more features including wider carrier or frequency channel bandwidth, shorter symbol duration, shorter TTI duration, or modified control channel configuration. In some cases, an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have a suboptimal or non-ideal backhaul link). An eCC may also be configured for use in unlicensed spectrum or shared spectrum (e.g., where more than one operator is allowed to use the spectrum). An eCC characterized by wide carrier bandwidth may include one or more segments that may be utilized by UEs  115  that are not capable of monitoring the whole carrier bandwidth or are otherwise configured to use a limited carrier bandwidth (e.g., to conserve power). 
     In some cases, an eCC may utilize a different symbol duration than other CCs, which may include use of a reduced symbol duration as compared with symbol durations of the other CCs. A shorter symbol duration may be associated with increased spacing between adjacent subcarriers. A device, such as a UE  115  or base station  105 , utilizing eCCs may transmit wideband signals (e.g., according to frequency channel or carrier bandwidths of 20, 40, 60, 80 MHz, etc.) at reduced symbol durations (e.g., 16.67 microseconds). A TTI in eCC may include one or multiple symbol periods. In some cases, the TTI duration (that is, the number of symbol periods in a TTI) may be variable. 
     Wireless communications systems such as NR systems may utilize any combination of licensed, shared, and unlicensed spectrum bands, among others. The flexibility of eCC symbol duration and subcarrier spacing may allow for the use of eCC across multiple spectrums. In some examples, NR shared spectrum may increase spectrum utilization and spectral efficiency, specifically through dynamic vertical (e.g., across frequency) and horizontal (e.g., across time) sharing of resources. 
     In some cases, aspects of the wireless communications system  100  may be configured as a MuLTEFire network. A MuLTEFire network may include base stations  105  communicating with UEs  115  in unlicensed radio frequency spectrum band, e.g., without a licensed radio frequency anchor carrier. For example, the MuLTEFire network may operate without an anchor carrier in licensed radio frequency spectrum.  
     In some examples of the wireless communications system  100 , such as MuLTEFire, FeLAA, and NR, a UE  115  may be configured for autonomous uplink transmission as an AUL UE  115 . A base station  105  may schedule a UE  115  for uplink communications through an assignment or grant of resources. In some cases, the base station  105  may configure the UE  115  to autonomously transmit uplink communications according to an autonomous uplink configuration. In such cases, the base station  105  may not be aware of particular timings for uplink transmissions, due to the autonomous nature of such transmissions and due to the contention-based access to the shared radio frequency spectrum band. 
     In some aspects, a UE  115  may receive, from a base station  105 , a group identifier of the UE. The UE  115  may receive, from the base station  105 , an indication of one or more group identifiers associated with unscheduled communications (e.g., AUL communications) with the base station  105  during a time period. The UE  115  may contend, based on the group identifier of the UE and the one or more group identifiers received from the base station, for access to a set of AUL resources during the time period. The UE  115  may perform, based on the contending, an AUL transmission to the base station  105  using the set of AUL resources. 
     In some cases, UEs  115  configured for AUL transmissions may be allocated resources to occupy a full channel bandwidth. In such cases, the base station  105  may configure the UE  115  to randomly select a starting offset value from a set of starting offset values (e.g., physical uplink shared channel (PUSCH) starting offset values). In some cases, the set of starting offset values may be the same set of starting offset values as for partial channel bandwidth-allocated UEs  115 . In some cases, the set of starting offset values for AUL transmissions inside of an MCOT transmission opportunity may be different than the set of starting offset values for AUL transmissions outside of the MCOT transmission opportunity. The UE  115  may then select one value from the set of starting offset values to use as a starting offset value for each AUL transmission. In this way, different UEs  115  of a group of UEs  115  may be multiplexed in time (i.e., TDM), as UEs  115  having selected an earlier starting offset value may cause UEs  115  having selected a later offset value to fail a CCA procedure if the earlier UE  115  is still transmitting at the time of the later starting value offset.  
     Alternatively, UEs  115  configured for AUL transmissions may be allocated resources to occupy a partial channel bandwidth. In such cases, a base station  105  may configure the UE  115  with a particular starting offset value (e.g., an AUL-specific PUSCH start offset value) for AUL transmissions. This may be performed additionally or alternatively to, for example, the UE  115  selecting its own starting offset value from a possible set of values. Configuring the UE  115  with an AUL starting offset value may prevent multiple UEs  115  from blocking each other when allocated non-overlapping resources (i.e., in FDM). In some cases, the base station  105  may configure the UE  115  with a first starting offset value for AUL transmissions inside of an MCOT transmission opportunity and a second starting offset value for AUL transmissions outside of the MCOT transmission opportunity, where the first starting offset value may be different than the second starting offset value. In some cases, the base station  105  may configure multiple UEs  115  (e.g., a subset of UEs served by the base station  105 , such as all UE  115  within a given portion of the geographical coverage area  110  of the base station  105 ) with the same starting offset value or values for AUL transmissions in a particular subframe. The base station  105  may select a starting offset value from a set of starting offset values defined for AUL transmissions from UEs  115 . This set of starting offset values may be, for example, the same set of starting offset values from which the UEs  115  may select when the UEs  115  are allocated a full channel bandwidth for AUL transmissions. 
     In some cases, multiple UEs  115  with a partial channel bandwidth allocated for AUL transmission may each be configured with the same starting offset value. In such cases, the total number of UEs that may transmit AUL transmissions during one AUL subframe may be limited to the total number of orthogonal interlaces in the AUL subframe. Thus, overprovisioning of resources may not be supported, and a resource utilization efficiency may be relatively lower. Further, if one of the UEs  115  does not have data to transmit in the AUL subframe, the interlace allocated to the UE  115  may be unused for that AUL subframe when another UE  115  may have been able to use the same resources to transmit data. Accordingly, as described herein, it may be desirable to provide techniques for assigning group-based starting offset values for partial-interlace assigned UEs  115  for AUL transmission. Further, interlace-based LBT is also described herein UEs  115  for partial-interlace assigned UEs  115  for AUL transmission.  
       FIG. 2  illustrates an example of a wireless communications system  200  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. In some examples, the wireless communications system  200  may implement aspects of wireless communications system  100 . In the example of  FIG. 2 , the wireless communications system  200  may include a base station  105 - a , which may be an example of a base station  105  as described with reference to  FIG. 1 . The wireless communications system  200  may also include a first UE  115 - a  and a second UE  115 - b , which may be examples of a UE  115  as described with reference to  FIG. 1 , that are located within the geographic coverage area  110 - a  of the base station  105 - a . The first UE  115 - a  may be one UE  115  of a first group of multiple UEs  115 , and the second UE  115 - b  may be one UE  115  of a second group of multiple UEs  115 . 
     In the example of  FIG. 2 , the base station  105 - a  and the first UE  115 - a  may establish a first connection and the base station  105 - a  and the second UE  115 - b  may establish a second connection. On the downlink, the base station  105 - a  may transmit respective partial bandwidth configurations  210  to each of the UEs  115 . On the uplink, each of the UEs  115  may transmit respective partial bandwidth AUL transmissions  220  to the base station  105 - a . In some cases, a first partial bandwidth configuration  210 - a  may provide a configuration for the UE  115 - a  to use to transmit a first partial bandwidth AUL transmission  220 - a . Similarly, a second partial bandwidth configuration  210 - b  may provide a configuration for the UE  115 - b  to use to perform a second partial bandwidth AUL transmission  220 - b . In some cases, each of the first UE  115 - a  and the second UE  115 - b  may concurrently perform the respective partial bandwidth AUL transmissions  220  via their respective connections. 
     In some cases, the base station  105 - a  may assign group-based starting offset values for AUL transmissions from UEs  115  located within the geographic coverage area  110 - a . For example, the base station  105 - a  may transmit the first partial bandwidth configuration  210 - a  to the first UE  115 - a , where the first partial bandwidth configuration  210 - a  may indicate a first channel interlace and a first portion of a channel bandwidth (i.e., an indication of a partial bandwidth channel) for the first UE  115 - a  to use for AUL transmissions. That is, the base station  105 - a  may indicate to the UE  115 -a the time and frequency resources that have been allocated to the UE  115 - a  for partial bandwidth transmissions. For instance, the base station  105 - a  may assign a particular interlace (e.g., interlace 0) and a particular range of radio frequency spectrum that the  first UE  115 - a  may use for AUL transmissions. The base station  105 - a  may similarly transmit the second partial bandwidth configuration  210 - b  to the second UE  115 - b , where the second partial bandwidth configuration  210 - b  may indicate a second channel interlace and a second portion of a channel bandwidth for the second UE  115 - b  to use for AUL transmissions. The base station  105 - a  may further transmit to each of the UEs  115  an AUL configuration, where the AUL configuration may include parameters for AUL transmissions, including, for example, a group identifier (e.g., a group ID). In some cases, the base station  105 - a  may transmit the partial bandwidth configurations  210  with the AUL configurations. 
     One or more of the UEs  115  may determine to transmit a partial bandwidth AUL transmission  220  according to the received partial bandwidth configurations  210  and the AUL configurations. For example, the UE  115 - a  may determine to transmit a partial bandwidth AUL transmission  220 - a  on the first channel interlace and the first portion of the channel bandwidth according to the received partial bandwidth configuration  210 - a . The UE  115 - a  may then select a starting offset value for the AUL transmission. The starting offset value may correspond to a particular point within an AUL subframe at which the UE  115 - a  is to begin transmitting. In some cases, the UE  115 - a  may select the starting offset value randomly from a set of defined starting offset values for AUL transmissions as a function of the group identifier received from the base station  105 - a  in the AUL configuration. Additionally alternatively, a UE  115  may select the starting offset value as a function of a slot number of the AUL subframe. In some cases, a first set of starting offset values may be defined for AUL transmissions within an MCOT transmission opportunity, and a second set of starting offset values may be defined for AUL transmissions outside of the MCOT transmission opportunity, where the MCOT transmission opportunity may be obtained by the base station  105 - a . For example, for AUL transmissions within an MCOT transmission opportunity, the set of starting offset values from which the UE  115 - a  may select a value may be: {16 μs, 25 μs, 34 μs, 43 μs, 52 μs, 61 μs, OS #1}, and for AUL transmissions outside of the MCOT transmission opportunity, the set of starting offset values may be {34 μs, 43 μs, 52 μs, 61 μs, OS #1}. 
     In this way, the base station  105 - a  may group the UEs  115  located within its geographic coverage area  110 - a  into multiple groups, where each group, as identified by its corresponding group identifier, may transmit according to a unique starting offset  value. The base station  105 - a  may group the UEs  115  according to their corresponding bandwidth allocation, where each group of UEs  115  includes UEs  115  allocated non-overlapping resources. For example, the first UE  115 - a  and the second UE  115 - b  may both be allocated a first channel interlace and a first portion of a channel bandwidth. In this example, the base station  105 - a  may group the first UE  115 - a  in a first group UEs  115 , where the first group of UEs  115  includes a further UE  115  allocated a second channel interlace and a second portion of the channel bandwidth, a further UE  115  allocated a third channel interlace and a third portion of the channel bandwidth, and so on. Similarly, the base station  105 - a  may group the second UE  115 - a  in a second group UEs  115 , where the second group of UEs  115  may include one or more UEs each allocated non-overlapping interlaces and channel bandwidths. In some cases, a UE  115  allocated a full channel may be in a “group” of its own. 
     The base station  105 - a  may signal a first AUL configuration with a first group identifier to each UE  115  of the first group of UEs  115  and a second AUL configuration with a second group identifier the second group of UEs  115 . Then, according to the received first and second group identifiers, each UE  115  of the first and second groups of UEs  115  may select a starting offset value from the set of starting offset values, where the selected starting offset values are different from one another. In this way, each UE  115  of the first group of UEs  115  may transmit together at a first time within an AUL subframe according to a first starting offset value, and each UE  115  of the second group of UEs  115  may transmit together at a second time within the AUL subframe according to a second starting offset value. Thus, as each UE  115  of each group is allocated non-overlapping resources within its respective group of UEs  115 , no two UEs  115  will block each other by transmitting on the same frequency resources at the same time. 
       FIG. 3  illustrates an example subframe configuration  300  for a wireless communications system that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The example subframe configuration  300  may be an example of the partial bandwidth configurations and resource allocations for groups of UEs  115  for AUL transmissions to a base station  105  as described with reference to  FIG. 2 .  
     As shown in the example subframe configuration  300 , a radio frequency bandwidth of an AUL subframe  305  may be divided into a one or more interlaces. Each interlace may include one more radio frequency bands  310  each including one or more resource elements  315 . In some cases, the radio frequency bands  310  of one interlace may be non-contiguous bands where the radio frequency bands  310  may be spaced in frequency according to a uniform spreading pattern or a non-uniform spreading pattern. 
     As described with reference to  FIG. 2 , a partial bandwidth configuration may provide a configuration for a UE  115  to use to transmit a partial bandwidth AUL transmission. The example subframe configuration  300  shows multiple partial bandwidth configurations for multiple groups of UEs  115 . Each partial bandwidth configuration may include, for example, an indication of a channel interlace and a portion of a channel bandwidth (i.e., an indication of a partial bandwidth channel) for a respective UE  115  to use for partial bandwidth AUL transmissions. The example subframe configuration shows a first interlace (e.g., interlace 0) and a second interlace (e.g., interlace 1). 
     A base station  105  may transmit a partial bandwidth configuration to one or more UEs  115  to configure the UEs  115  with a particular interlace. For example, a base station  105  may configure a first UE  115  and a second UE  115  to use the first interlace  320 . The base station may configure a third UE  115  and a fourth UE  115  to use the second interlace  325 . In this case, a first group may include the first UE  115  and the third UE  115 , as they are allocated different non-overlapping resources (i.e., one using the first interlace  320 , and the other using the second interlace  325 ). Similarly, a second group may include the second UE  115  and the fourth UE  115 . The base station  105  may additionally transmit an AUL configuration to the UEs  115 , the AUL configuration including a group identifier. The first UE  115  and the second UE  115  may randomly select a starting offset value from a set of starting offset values based on their group identifier (i.e., the first group) to determine a starting offset for an AUL transmission (e.g., selecting a random offset value of 34 μs). Similarly the second UE  115  and fourth UE  115  may select a starting offset value based on their group identifier (i.e., the second group) to determine a starting offset for an AUL transmission (e.g., selecting a random offset value of 43 μs).  
     After completing a channel access procedure (e.g., the interlace-based LBT procedure as described with reference to  FIG. 4 ), if the first UE  115  and the third UE  115  have data to transmit in an AUL transmission, the UEs may transmit according to their determined starting offset of 34 μs. If the first UE  115  and the third UE  115  have data to transmit and accordingly transmit the data. If the first UE  115  and the third UE  115  do not have data to transmit, the second UE  115  and the fourth UE  115  may transmit according to their determined starting offset of 43 μs. Accordingly, the described techniques provide for later groups of UEs  115  to transmit an AUL transmission using the same resources as another group of UEs  115  when the first group may not have had data to transmit, and otherwise would have underutilized the resources. 
       FIG. 4  illustrates an example of a transmission timeline  400  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. In some examples, the transmission timeline  400  may implement aspects of the wireless communications systems as described with reference to  FIGS. 1 and 2 , respectively. In some examples, the transmission timeline  400  may be configured according to aspects of the subframe configuration as described with reference to  FIG. 3 . The transmission timeline  400  illustrates one or more UEs  115  performing a per-interlace LBT procedure before transmitting AUL transmissions. The transmission timeline  400  shows a transmission scheme across a plurality of OFDM symbols  405 . 
     In some cases, assigning group-based starting offset values for partial-interlace assigned UEs  115  for AUL transmission, as described with reference to  FIGS. 2 and 3 , may provide for relatively increased utilization of the medium when groups of UEs  115  having earlier-assigned starting offset values do not have data to transmit thus allowing later-assigned UEs  115  to utilize the same resources to transmit data. In some such cases, however, a UE  115  in the later-transmitting group may perform a full-bandwidth LBT procedure and detect an earlier-transmitting UE  115  transmitting on a different interlace. However, because the full-bandwidth LBT procedure detects across all interlaces rather than only the interlace on which the UE  115  is to transmit, the transmission of the earlier-transmitting UE  115  may unnecessarily block the later-transmitting UE  115 . Thus, in some such cases, it may be beneficial for the later-transmitting UE  115  to perform an LBT procedure in which the  UE  115  measures the energy of its assigned interlace so as not to be unnecessarily blocked from transmitting. Accordingly, techniques described herein provide for interlace-based LBT in which a UE  115  may measure the energy of its assigned interlace and compare the measured energy to an energy threshold. 
     The transmission timeline  400  shows an example transmission scheme for two groups of UEs  115  transmitting and performing an interlace-based LBT procedure. The transmission timeline  400  includes starting positions  410 , an idle time  415 , a sensing period  420 , and an AUL transmission period  425 . The starting positions  410  include a first starting position  410  for a first group of UEs  115  and a second starting position  410  for a second group of UEs. Starting with the first starting position  410 , the first group of UEs  115  may begin transmitting data if the UEs  115  have data to transmit. Following the first starting position  410 , there may be an idle time  415  until, for example, a boundary of the next OFDM symbol  405 . 
     In the next OFDM symbol  405 - b , the second group of UEs  115  assigned a later starting offset value for transmitting within a subframe may perform medium sensing based on the group&#39;s assigned interlace (i.e., interlace-based LBT). The second group of UEs  115  may perform the medium sensing for the duration of the sensing period  420 . Finally, following the starting position  410  for the second group of UEs  115 , the first group of UEs  115  and/or the second group of UEs  115  may transmit during the AUL transmission period  425 . 
     Interlace-based LBT may be performed by measuring the energy on its assigned interlace. To measure the energy on the interlace, the UE  115  may collect one or more samples of the given OFDM symbol  405 . In some cases, the UE  115  may further perform a fast Fourier transform (FFT) on the measured energy increasing an amount of time for performing energy detection. Thus, in some cases, a base station  105  may allot a relatively larger amount of time to avoid CCA collisions for the starting positions  410  for the interlace-based LBT procedure as compared to a time domain CCA procedure. In some cases, a UE may use a subset of resource elements on an interlace to measure the energy of the interlace. In some cases, for example, a UE  115  may leave some edge resource elements of its allocated interlace specifically for interlace energy detection so as to avoid potential leakage due to potential timing offset or different subcarrier spacings.  
     In some cases, a starting position  410  for transmission may not be aligned with an boundary of an OFDM symbol  405 . For example, as shown in  FIG. 4 , the second starting position  410  begins during the second OFDM symbol  405 - b . In such cases, a UE  115  may transmit a filler signal  430  until the boundary of the OFDM symbol  405 . As shown in  FIG. 4 , the filler signal  430  spans the idle time  415  and the entirety of the second OFDM symbol  405 - b . In some cases, to avoid interfering with other UEs  115  due to leakage to adjacent interlaces, the UE  115  may transmit the filler signal  430  with a smaller set of resource elements than all resource elements of the assigned interlace. For instance, the UE  115  may not transmit the filler signal  430  on edge resource elements of its assigned interlace. Additionally or alternatively, if the UE  115  detects low energy on an adjacent interlace, the UE  115  may use an extended cyclic prefix as the filler signal  430 , and if the UE  115  detects a high energy on an adjacent interlace, the UE  115  may or may not transmit the filler signal  430  depending on the particular energy level. 
     In some cases, the described interlace based-LBT procedure may use a relatively longer gap between the first and second starting positions  410 . Because of this relatively longer gap, it may be possible for another node (e.g., a Wi-Fi node) to use the medium during the idle time  415  when neither group of UEs  115  is transmitting. To avoid such medium collisions, the UEs  115  in the second group may measure: an interlace energy (E0) on a first symbol (e.g., symbol x0), and a full-bandwidth time-domain energy (E) up to the starting position  410  for the UE  115  (e.g., symbol x2). In some cases, E may be a combination of multiple observations of energy measurement on multiple CCA slots. Assuming that the first group of UEs  115  starts on symbol x0 and the second group of UEs  115  starts on symbol x 2 , the second group of UEs  115  may use the gap for interlace energy measurement, shown as the sensing period  420  in  FIG. 4 . A UE  115  of the second group of UEs  115  may transmit if the EO measurement is less than an energy threshold (e.g., Th1), if there is not a significant energy increase in the time domain energy measurement of E, and if E, or an average (E), is less than a second threshold (e.g., Th3), where Th3 may be a more relaxed threshold than Th1. 
     In some cases, the described interlace based-LBT techniques may be used for scheduled uplink (SUL) transmissions, as well as potential collision avoidance between SUL transmissions and AUL transmissions. In some cases, multiple UEs  115  may be assigned to transmit on multiple subframes on different interlaces using FDM.  Without the described interlace-based LBT techniques, the FDM UEs  115  may each need to check the medium at the same time, otherwise the FDM UEs  115  may block each other in a subsequent subframe even the interfering UE  115  stop transmitting in the subsequent subframe. The described interlace-based LBT techniques, however, may allow the UEs  115  to measure the energy on a per-interlace basis and thus may not be blocked by other UEs transmitting AUL and/or SUL transmissions on other interlaces. 
     In some cases, the described interlace-based LBT techniques may be used for SUL transmissions, or between AUL transmissions and SUL transmissions where different UEs  115  are assigned different orthogonal interlaces. In some cases, UEs  115  assigned to the same partial interlace may be assigned different starting positions within a SUL subframe. These starting positions may be selected based on a group identifier in a similar manner as described for AUL transmissions, as described with reference to  FIG. 2 . In this case, the group identifier may be assigned with a SUL grant, or through other configuration signaling. In some cases, a first group may include AUL UEs and a second group may include SUL UEs. In some cases, the SUL UEs may utilize similar energy sensing techniques for per-interlace LBT, as described herein. 
     The described interlace-based LBT techniques may additionally be used for downlink transmissions. That is, interlace-based LBT may be performed among downlink nodes, as well as between uplink nodes and downlink nodes. In some cases, a base station  105  may transmit on an unused interlace if the base station  105  determines that no other nodes (e.g., other downlink nodes or uplink nodes) are using the given interlace. 
       FIG. 5  illustrates an example of a process flow  500  in a wireless communications system that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. In some examples, the process flow  500  may implement aspects of the wireless communications system  100 . For example, the process flow  500  includes a base station  105 - b  and UEs  115 - c ,  115 - d , and  115 - e  that each may be examples of the corresponding devices as described with reference to  FIGS. 1 through 4 . The process flow  500  may illustrate an example of assigning group-based starting offset values for partial-interlace assigned UEs  115  for AUL transmission. For example, the UE  115 - c  and the UE  115 - d  may be assigned to a  first group of UEs  115 , and the UE  115 - e  may be assigned to a second group of UEs  115 . 
     At  505 , the base station  105 - b  may transmit partial bandwidth configurations to each of the UEs  115 . For example, the base station  105 - b  may transmit a first partial bandwidth configuration to the UE  115 - c , a second partial bandwidth configuration to the UE  115 - d , and a third partial bandwidth configuration to the UE  115 - d . Each of the UEs  115  may correspondingly receive the partial bandwidth configurations for uplink transmissions. Each of the partial bandwidth configuration may indicate channel interlaces and portions of a channel bandwidth for AUL transmissions. In some cases, the base station  105 - b  may transmit each of the partial bandwidth configurations to each of the UEs  115  at substantially the same time. 
     At  510 , the base station  105 - b  may transmit AUL configurations to each of the UEs  115 . For example, the base station  105 - b  may transmit a first AUL configuration to the UE  115 - c , a second AUL configuration to the UE  115 - d , and a third AUL configuration to the UE  115 - d . In some cases, each of the AUL configurations may be based on the partial bandwidth configurations. In some cases, the AUL configurations and partial bandwidth configurations, as described at  505 , may be transmitted together, for example, as part of one configuration transmission. Each of the UEs  115  may correspondingly receive the AUL configurations, where the AUL configurations may each include a group identifier. The group identifier may be associated with one or more of the UEs  115  having non-overlapping resource allocations. For example, as the UE  115 - c  and the UE  115 - d  are both of the first group of UEs  115  and thus each receive a first group identifier, they may have non-overlapping resource allocations. Similarly, the UE  115 - e  may receive a second group identifier identify the UE  115 - e  as belonging to a second group of UEs  115 . In some cases, the base station  105 - b  may transmit each of the AUL configurations to each of the UEs  115  at substantially the same time. 
     At  515 , each of the UEs  115  may determine a starting offset. For example, each UE  115  may determine a starting offset with respect to an AUL subframe for a partial bandwidth transmission based on the group identifiers, as may have been received in the AUL configurations at  510 . In some cases, determining the starting offset may include selecting the starting offset from a set of defined starting offset  values. In some cases, selecting the starting offset may include randomly selecting the starting offset from the set of defined starting offset values. In some cases, randomly selecting the starting offset may be based on the group identifier for the UE and/or a slot number of the AUL subframe for the partial bandwidth transmission by the UE. In some cases, selecting the starting offset is based on whether the partial bandwidth transmission of the UE is inside of (or conversely, outside of) a MCOT. 
     At  520 - a , the UE  115 - c  may perform the partial bandwidth transmission according to the starting offset, as may have been determined at  515 - a , over the channel interlace and the portion of the channel bandwidth, as may have been received at  505  and  510 , respectively. That is, the UE  115 - c  may transmit to the base station  105 - b , and the base station  105 - b  may receive from the UE  115 - c , a first partial bandwidth transmission. The UE  115 - c  may transmit the first partial bandwidth transmission at a first starting offset with respect to an AUL subframe, where the first starting offset may be based on the group identifier, as may have been received at  510 . In some cases, prior to transmitting the partial bandwidth transmission, the UE  115 - c  may perform a per-interlace LBT procedure by measuring an energy level of at least the portion of the channel interlace based on the partial bandwidth configuration, as may have been received at  505 . The UE  115 - c  may determine an availability of at least the portion of the channel interlace based on the per-interlace LBT procedure, and transmit over the channel interlace based on the determined availability. 
     At  520 - b , the UE  115 - d  may perform the partial bandwidth transmission according to the starting offset, as may have been determined at  515 - b , over the channel interlace and the portion of the channel bandwidth, as may have been received at  505  and  510 , respectively. That is, the UE  115 - d  may transmit to the base station  105 - b , and the base station  105 - b  may receive from the UE  115 - d , a second partial bandwidth transmission. The UE  115 - d  may transmit the second partial bandwidth transmission at the first starting offset with respect to the AUL subframe, where the first starting offset may be based on the group identifier, as may have been received at  510 . In some cases, prior to transmitting the partial bandwidth transmission, the UE  115 - d  may perform a per-interlace LBT procedure by measuring an energy level of at least the portion of the channel interlace based on the partial bandwidth configuration, as may have been received at  505 . The UE  115 - d  may determine an availability of at least the portion of  the channel interlace based on the per-interlace LBT procedure, and transmit over the channel interlace based on the determined availability. 
     At  520 - c , the UE  115 - e  may perform the partial bandwidth transmission according to the starting offset, as may have been determined at  515 - c , over the channel interlace and the portion of the channel bandwidth, as may have been received at  505  and  510 , respectively. That is, the UE  115 - d  may transmit to the base station  105 - b , and the base station  105 - b  may receive from the UE  115 - e , a third partial bandwidth transmission. The UE  115 - e  may transmit the third partial bandwidth transmission at a second starting offset with respect to the AUL subframe, where the second starting offset may be based on the group identifier, as may have been received at  510 . In some cases, prior to transmitting the partial bandwidth transmission, the UE  115 - e  may perform a per-interlace LBT procedure by measuring an energy level of at least the portion of the channel interlace based on the partial bandwidth configuration, as may have been received at  505 . The UE  115 - e  may determine an availability of at least the portion of the channel interlace based on the per-interlace LBT procedure, and transmit over the channel interlace based on the determined availability. 
       FIG. 6  illustrates an example of a process flow  600  in a wireless communications system that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. In some examples, the process flow  600  may implement aspects of the wireless communications system  100 . For example, the process flow  600  includes a base station  105 - c  and a UEs  115 - f  that each may be examples of the corresponding devices as described with reference to  FIGS. 1 through 5 . The process flow  600  may illustrate an example of interlace-based LBT procedures, for example, as described with reference to  FIG. 4 . 
     At  605 , the base station  105 - c  may transmit to the UE  115 - f , and the UE  115 - f  may receive from the base station  105 - c , a channel interlace configuration for transmissions in a shared radio frequency spectrum band. In some cases, the channel interlace configuration may include a SUL configuration for scheduled transmissions from the UE  115 - f  to the base station  105 - c.    
     At  610 , the UE  115 - f  may perform a per-interlace LBT procedure by measuring an energy level of at least a portion of a channel interlace of the shared radio frequency spectrum band based on the received channel interlace configuration. In some  cases, performing the per-interlace LBT procedure may include measuring the energy level of a subset of REs of the portion of the channel interlace. In some cases, the UE  115 - f  may performing a FFT on the measured energy level of at least the portion of the channel interlace. In some cases, the UE  115 - f  may receive an indication of a starting symbol (e.g., an OFDM symbol). In some cases, the UE  115 - f  may transmit a filler signal following the per-interlace LBT procedure and prior to the indicated starting OFDM symbol based on a result of the per-interlace LBT procedure. In some cases, the filler signal may be transmitted using a subset of REs of the portion of the channel interlace. In some cases, the filler signal may be an extended cyclic prefix. Additionally or alternatively, the UE  115 - f  may perform a full-interlace LBT procedure by measuring an energy level of a full-channel interlace of the shared radio frequency spectrum band. 
     At  615 , the UE  115 - f  may determine an availability of the channel interlace based on the per-interlace LBT procedure. In some cases, the UE  115 - f  may determine an energy level of a second channel interlace adjacent to the channel interlace, where the filler signal may be transmitted based on the energy level of the second channel interlace 
     At  620 , the UE  115 - f  may transmit to the base station  105 - c , and the base station  105 - c  may receive from the UE  115 - f , an uplink transmission (e.g., an AUL transmission) over the channel interlace based on the availability of the channel interlace, as may have been determined at  615 . 
       FIG. 7  shows a block diagram  700  of a wireless device  705  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The wireless device  705  may be an example of aspects of a UE  115  as described with reference to  FIGS. 2 through 6 . The wireless device  705  may include a receiver  710 , a UE communications manager  715 , and a transmitter  720 . The wireless device  705  may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses). 
     The receiver  710  may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to partial-interlace transmission for AUL transmissions, etc.). Information may be passed on to other components of the device. The receiver  710  may be an example of aspects of the transceiver  1035  as  described with reference to  FIG. 10 . The receiver  710  may utilize a single antenna or a set of antennas. 
     The UE communications manager  715  may be an example of aspects of the UE communications manager  1015  as described with reference to  FIG. 10 . The UE communications manager  715  and/or at least some of its various sub-components may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions of the UE communications manager  715  and/or at least some of its various sub-components may be executed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure. The UE communications manager  715  and/or at least some of its various sub-components may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical devices. In some examples, the UE communications manager  715  and/or at least some of its various sub-components may be a separate and distinct component in accordance with aspects of the present disclosure. In other examples, the UE communications manager  715  and/or at least some of its various sub-components may be combined with one or more other hardware components, including but not limited to an I/O component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with aspects of the present disclosure. 
     The UE communications manager  715  may receive a partial bandwidth configuration for uplink transmissions by the UE where the partial bandwidth configuration may indicate a channel interlace and a portion of a channel bandwidth. The UE communications manager  715  may receive an AUL configuration including a group identifier. The UE communications manager  715  may determine a starting offset with respect to an AUL subframe for a partial bandwidth transmission by the UE based on the group identifier. The UE communications manager  715  may perform the partial bandwidth transmission according to the determined starting offset over the channel interlace and the portion of the channel bandwidth.  
     The transmitter  720  may transmit signals generated by other components of the device. In some examples, the transmitter  720  may be collocated with a receiver  710  in a transceiver module. For example, the transmitter  720  may be an example of aspects of the transceiver  1035  as described with reference to  FIG. 10 . The transmitter  720  may utilize a single antenna or a set of antennas. 
       FIG. 8  shows a block diagram  800  of a wireless device  805  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The wireless device  805  may be an example of aspects of a wireless device  705  or a UE  115  as described with reference to  FIG. 2-7 . The wireless device  805  may include a receiver  810 , a UE communications manager  815 , and a transmitter  820 . The wireless device  805  may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses). 
     The receiver  810  may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to partial-interlace transmission for AUL transmissions, etc.). Information may be passed on to other components of the device. The receiver  810  may be an example of aspects of the transceiver  1035  as described with reference to  FIG. 10 . The receiver  810  may utilize a single antenna or a set of antennas. 
     The UE communications manager  815  may be an example of aspects of the UE communications manager  1015  as described with reference to  FIG. 10 . The UE communications manager  815  may also include receiving component  825 , starting offset component  830 , and transmitting component  835 . 
     The receiving component  825  may receive a partial bandwidth configuration for uplink transmissions by the UE, where the partial bandwidth configuration may indicate a channel interlace and a portion of a channel bandwidth and receive an AUL configuration, where the AUL configuration may include a group identifier. In some cases, the group identifier may be associated with one or more UEs having non-overlapping resource allocations.  
     The starting offset component  830  may determine a starting offset with respect to an AUL subframe for a partial bandwidth transmission by the UE based on the group identifier. In some cases, the determining the starting offset includes selecting the starting offset from a set of defined starting offset values. In some cases, selecting the starting offset may include randomly selecting the starting offset from the set of defined starting offset values. In some cases, randomly selecting the starting offset may be based on the group identifier for the UE or a slot number of the AUL subframe for the partial bandwidth transmission by the UE. In some cases, selecting the starting offset may be based on whether the partial bandwidth transmission of the UE is inside of a MCOT. 
     The transmitting component  835  may perform the partial bandwidth transmission according to the determined starting offset over the channel interlace and the portion of the channel bandwidth and transmit over the channel interlace based on the determined availability. 
     Transmitter  820  may transmit signals generated by other components of the device. In some examples, the transmitter  820  may be collocated with a receiver  810  in a transceiver module. For example, the transmitter  820  may be an example of aspects of the transceiver  1035  as described with reference to  FIG. 10 . The transmitter  820  may utilize a single antenna or a set of antennas. 
       FIG. 9  shows a block diagram  900  of a UE communications manager  915  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The UE communications manager  915  may be an example of aspects of a UE communications manager as described with reference to  FIGS. 7, 8, and 10 . The UE communications manager  915  may include a receiving component  920 , a starting offset component  925 , a transmitting component  930 , and a LBT component  935 . Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses). 
     The receiving component  920  may receive a partial bandwidth configuration for uplink transmissions by the UE, the partial bandwidth configuration indicating a channel interlace and a portion of a channel bandwidth and receive an AUL configuration where the AUL configuration may include a group identifier. In some  cases, the group identifier may be associated with one or more UEs having non-overlapping resource allocations. 
     The starting offset component  925  may determine a starting offset with respect to an AUL subframe for a partial bandwidth transmission by the UE based on the group identifier. In some cases, the determining the starting offset may include selecting the starting offset from a set of defined starting offset values. In some cases, selecting the starting offset may include randomly selecting the starting offset from the set of defined starting offset values. In some cases, randomly selecting the starting offset may be based on the group identifier for the UE or a slot number of the AUL subframe for the partial bandwidth transmission by the UE. In some cases, selecting the starting offset may be based on whether the partial bandwidth transmission of the UE is inside of a MCOT. 
     The transmitting component  930  may perform the partial bandwidth transmission according to the determined starting offset over the channel interlace and the portion of the channel bandwidth and transmit over the channel interlace based on the determined availability. 
     In some cases, the LBT component  935  may perform a per-interlace LBT procedure by measuring an energy level of at least the portion of the channel interlace based on the received partial bandwidth configuration and determine an availability of at least the portion of the channel interlace based on the per-interlace LBT procedure. 
       FIG. 10  shows a diagram of a wireless communications system  1000  including a wireless device  1005  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The wireless device  1005  may be an example of or include the components of a wireless device  705 , a wireless device  805 , or a UE  115  as described above, for example, with reference to  FIGS. 7 and 8 . The wireless device  1005  may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a UE communications manager  1015 , a processor  1020 , a memory  1025 , a software  1030 , a transceiver  1035 , an antenna  1040 , and an I/O controller  1045 . These components may be in electronic communication via one or more buses (e.g., bus  1010 ). The wireless device  1005  may communicate wirelessly with one or more base stations  105 .  
     The processor  1020  may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a central processing unit (CPU), a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor  1020  may be configured to operate a memory array using a memory controller. In other cases, a memory controller may be integrated into the processor  1020 . The processor  1020  may be configured to execute computer-readable instructions stored in a memory to perform various functions (e.g., functions or tasks supporting partial-interlace transmission for AUL transmissions). 
     The memory  1025  may include random access memory (RAM) and read only memory (ROM). The memory  1025  may store computer-readable, computer-executable software  1030  including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory  1025  may contain, among other things, a basic input/output system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices. 
     The software  1030  may include code to implement aspects of the present disclosure, including code to support partial-interlace transmission techniques for AUL transmissions. The software  1030  may be stored in a non-transitory computer-readable medium such as system memory or other memory. In some cases, the software  1030  may not be directly executable by the processor but may cause a computer (e.g., when compiled and executed) to perform functions described herein. 
     The transceiver  1035  may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above. For example, the transceiver  1035  may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver  1035  may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas. 
     In some cases, the wireless device may include a single antenna  1040 . However, in some cases the device may have more than one antenna  1040 , which may be capable of concurrently transmitting or receiving multiple wireless transmissions.  
     The I/O controller  1045  may manage input and output signals for the wireless device  1005 . The I/O controller  1045  may also manage peripherals not integrated into the wireless device  1005 . In some cases, the I/O controller  1045  may represent a physical connection or port to an external peripheral. In some cases, the I/O controller  1045  may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, or another known operating system. In other cases, the I/O controller  1045  may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I/O controller  1045  may be implemented as part of a processor. In some cases, a user may interact with the wireless device  1005  via the I/O controller  1045  or via hardware components controlled by the I/O controller  1045 . 
       FIG. 11  shows a block diagram  1100  of a wireless device  1105  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The wireless device  1105  may be an example of aspects of a base station  105  as described herein. The wireless device  1105  may include a receiver  1110 , a base station communications manager  1115 , and a transmitter  1120 . The wireless device  1105  may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses). 
     The receiver  1110  may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to partial-interlace transmission for AUL transmissions, etc.). Information may be passed on to other components of the device. The receiver  1110  may be an example of aspects of the transceiver  1435  as described with reference to  FIG. 14 . The receiver  1110  may utilize a single antenna or a set of antennas. 
     The base station communications manager  1115  may be an example of aspects of the base station communications manager  1415  as described with reference to  FIG. 14 . The base station communications manager  1115  and/or at least some of its various sub-components may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions of the base station communications manager  1115  and/or at least some of its various sub-components may be executed by a general-purpose  processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure. The base station communications manager  1115  and/or at least some of its various sub-components may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical devices. In some examples, the base station communications manager  1115  and/or at least some of its various sub-components may be a separate and distinct component in accordance with aspects of the present disclosure. In other examples, the base station communications manager  1115  and/or at least some of its various sub-components may be combined with one or more other hardware components, including but not limited to an I/O component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with aspects of the present disclosure. 
     The base station communications manager  1115  may transmit, to a first UE of a first group of one or more UEs, a first partial bandwidth configuration, the first partial bandwidth configuration indicating a first channel interlace and a first portion of a channel bandwidth, transmit to the first UE a first AUL configuration including a first group identifier, and receive a first partial bandwidth transmission from the first UE at a first starting offset with respect to an AUL subframe, where the first starting offset is based on the first group identifier. 
     The transmitter  1120  may transmit signals generated by other components of the device. In some examples, the transmitter  1120  may be collocated with a receiver  1110  in a transceiver module. For example, the transmitter  1120  may be an example of aspects of the transceiver  1435  as described with reference to  FIG. 14 . The transmitter  1120  may utilize a single antenna or a set of antennas. 
       FIG. 12  shows a block diagram  1200  of a wireless device  1205  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The wireless device  1205  may be an example of aspects of a wireless device  1105  or a base station  105  as described with reference to  FIG. 11 . The wireless device  1205  may include a receiver  1210 , a base station communications manager  1215 , and a transmitter  1220 . The wireless device  1205  may  also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses). 
     The receiver  1210  may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to partial-interlace transmission for AUL transmissions, etc.). Information may be passed on to other components of the device. The receiver  1210  may be an example of aspects of the transceiver  1435  as described with reference to  FIG. 14 . The receiver  1210  may utilize a single antenna or a set of antennas. 
     The base station communications manager  1215  may be an example of aspects of the base station communications manager  1415  as described with reference to  FIG. 14 . The base station communications manager  1215  may also include a transmitting component  1225  and a receiving component  1230 . 
     The transmitting component  1225  may transmit, to a first UE of a first group of one or more UEs, a first partial bandwidth configuration. The first partial bandwidth configuration may indicate a first channel interlace and a first portion of a channel bandwidth. The transmitting component  1225  may transmit to a second UE a second partial bandwidth configuration, where the second partial bandwidth configuration may indicate a second channel interlace. In some cases, the second partial bandwidth transmission may be received over the second channel interlace and the first portion of the channel bandwidth. In some cases, the transmitting component  1225  may transmit to the first UE a first AUL configuration including a first group identifier. In some cases, the transmitting component  1225  may transmit a second AUL configuration to the second UE, where the second AUL configuration may include the first group identifier. 
     The receiving component  1230  may receive a first partial bandwidth transmission from the first UE at a first starting offset with respect to an AUL subframe, where the first starting offset may be based on the first group identifier. In some cases, the receiving component  1230  may receive a second partial bandwidth transmission from a second UE of the first group of one or more UEs where the second partial bandwidth transmission may be received at the first starting offset with respect to the AUL subframe. In some cases, the receiving component  1230  may receive a second partial bandwidth transmission from a second UE of a second group of one or more UEs  where the second partial bandwidth transmission may be received at a second starting offset with respect to the AUL subframe. In some cases, the transmitting component  1225  may transmit to the second UE a second AUL configuration including a second group identifier for the second UE, where the second starting offset may be based on the second group identifier. 
     The transmitter  1220  may transmit signals generated by other components of the device. In some examples, the transmitter  1220  may be collocated with a receiver  1210  in a transceiver module. For example, the transmitter  1220  may be an example of aspects of the transceiver  1435  as described with reference to  FIG. 14 . The transmitter  1220  may utilize a single antenna or a set of antennas. 
       FIG. 13  shows a block diagram  1300  of a base station communications manager  1315  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The base station communications manager  1315  may be an example of aspects of a base station communications manager  1415  described with reference to  FIGS. 11, 12, and 14 . The base station communications manager  1315  may include a transmitting component  1320 , a receiving component  1325 , and a configuration component  1330 . Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses). 
     The transmitting component  1320  may transmit, to a first UE of a first group of one or more UEs, a first partial bandwidth configuration, the first partial bandwidth configuration indicating a first channel interlace and a first portion of a channel bandwidth. In some cases, the transmitting component  1320  may transmit to the second UE a second partial bandwidth configuration, where the second partial bandwidth configuration may indicate a second channel interlace. In some cases, the second partial bandwidth transmission may be received over the second channel interlace and the first portion of the channel bandwidth. In some cases, the transmitting component  1320  may transmit to the first UE a first AUL configuration including a first group identifier. In some cases, the transmitting component  1320  may transmit a second AUL configuration to the second UE where the second AUL configuration may include the first group identifier. In some cases, the transmitting component  1320  may transmit to the second UE a second AUL configuration including a second group identifier for the second UE.  
     The receiving component  1325  may receive a first partial bandwidth transmission from the first UE at a first starting offset with respect to an AUL subframe, where the first starting offset may be based on the first group identifier. In some cases, the receiving component  1325  may receive a second partial bandwidth transmission from a second UE of the first group of one or more UEs, where the second partial bandwidth transmission may be received at the first starting offset with respect to the AUL subframe, In some cases, the receiving component  1325  may receive a second partial bandwidth transmission from a second UE of a second group of one or more UEs, where the second partial bandwidth transmission may be received at a second starting offset with respect to the AUL subframe. In some cases, the second starting offset may be based on the second group identifier. 
     The configuration component  1330  may determine the first AUL configuration based on the first partial bandwidth configuration. In some cases, the first starting offset may be from a set of defined starting offset values. In some cases, the first group of one or more UEs may include UEs assigned to non-overlapping channel interlaces. 
       FIG. 14  shows a diagram of a wireless communications system  1400  including a wireless device  1405  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The wireless device  1405  may be an example of or include the components of base station  105  as described, for example, with reference to  FIG. 1 . The wireless device  1405  may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a base station communications manager  1415 , a processor  1420 , a memory  1425 , a software  1430 , a transceiver  1435 , an antenna  1440 , a network communications manager  1445 , and an inter-station communications manager  1450 . These components may be in electronic communication via one or more buses (e.g., bus  1410 ). The wireless device  1405  may communicate wirelessly with one or more UEs  115 . 
     The processor  1420  may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor  1420   may be configured to operate a memory array using a memory controller. In other cases, a memory controller may be integrated into the processor  1420 . The processor  1420  may be configured to execute computer-readable instructions stored in a memory to perform various functions (e.g., functions or tasks supporting partial-interlace transmission for AUL transmissions). 
     The memory  1425  may include RAM and ROM. The memory  1425  may store computer-readable, computer-executable software  1430  including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory  1425  may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices. 
     The software  1430  may include code to implement aspects of the present disclosure, including code to support partial-interlace transmission techniques for AUL transmissions. The software  1430  may be stored in a non-transitory computer-readable medium such as system memory or other memory. In some cases, the software  1430  may not be directly executable by the processor but may cause a computer (e.g., when compiled and executed) to perform functions described herein. 
     The transceiver  1435  may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above. For example, the transceiver  1435  may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver  1435  may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas. 
     In some cases, the wireless device may include a single antenna  1440 . However, in some cases the device may have more than one antenna  1440 , which may be capable of concurrently transmitting or receiving multiple wireless transmissions. 
     The network communications manager  1445  may manage communications with the core network (e.g., via one or more wired backhaul links). For example, the network communications manager  1445  may manage the transfer of data communications for client devices, such as one or more UEs  115 .  
     The inter-station communications manager  1450  may manage communications with other base station  105 , and may include a controller or scheduler for controlling communications with the UEs  115  in cooperation with other base stations  105 . For example, the inter-station communications manager  1450  may coordinate scheduling for transmissions to the UEs  115  for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communications manager  1450  may provide an X2 interface within an LTE/LTE-A wireless communications network technology to provide communication between base stations  105 . 
       FIG. 15  shows a block diagram  1500  of a wireless device  1505  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The wireless device  1505  may be an example of a UE  115  and/or a base station  105  as described with reference to  FIGS. 2 through 14 . The wireless device  1505  may include a receiver  1510 , a wireless device communications manager  1515 , and a transmitter  1520 . The wireless device  1505  may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses). 
     The receiver  1510  may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to partial-interlace transmission for AUL transmissions, etc.). Information may be passed on to other components of the device. The receiver  1510  may be an example of aspects of the transceiver  1835  as described with reference to  FIG. 18 . The receiver  1510  may utilize a single antenna or a set of antennas. 
     The wireless device communications manager  1515  may be an example of aspects of the wireless device communications manager  1815  as described with reference to  FIG. 18 . 
     The wireless device communications manager  1515  and/or at least some of its various sub-components may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions of the wireless device communications manager  1515  and/or at least some of its various sub-components may be executed by a general-purpose  processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure. The wireless device communications manager  1515  and/or at least some of its various sub-components may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical devices. In some examples, the wireless device communications manager  1515  and/or at least some of its various sub-components may be a separate and distinct component in accordance with aspects of the present disclosure. In other examples, the wireless device communications manager  1515  and/or at least some of its various sub-components may be combined with one or more other hardware components, including but not limited to an I/O component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with aspects of the present disclosure. 
     The wireless device communications manager  1515  may receive a channel interlace configuration for transmissions by the UE in a shared radio frequency spectrum band. The wireless device communications manager  1515  may perform a per-interlace LBT procedure by measuring an energy level of at least a portion of a channel interlace of the shared radio frequency spectrum band based on the received channel interlace configuration. The wireless device communications manager  1515  may determine an availability of the channel interlace based on the per-interlace LBT procedure and transmit over the channel interlace based on the determined availability. 
     The transmitter  1520  may transmit signals generated by other components of the device. In some examples, the transmitter  1520  may be collocated with a receiver  1510  in a transceiver module. For example, the transmitter  1520  may be an example of aspects of the transceiver  1835  as described with reference to  FIG. 18 . The transmitter  1520  may utilize a single antenna or a set of antennas. 
       FIG. 16  shows a block diagram  1600  of a wireless device  1605  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The wireless device  1605  may be an example of aspects of a wireless device  1505  as described with reference to  FIG. 15  or a UE  115  and/or a base station  105  as described with reference to  FIGS. 2 through 14 . The  wireless device  1605  may include a receiver  1610 , a wireless device communications manager  1615 , and a transmitter  1620 . The wireless device  1605  may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses). 
     The receiver  1610  may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to partial-interlace transmission for AUL transmissions, etc.). Information may be passed on to other components of the device. The receiver  1610  may be an example of aspects of the transceiver  1835  as described with reference to  FIG. 18 . The receiver  1610  may utilize a single antenna or a set of antennas. 
     The wireless device communications manager  1615  may be an example of aspects of the wireless device communications manager  1815  as described with reference to  FIG. 18 . The wireless device communications manager  1615  may also include a receiving component  1625 , a measuring component  1630 , an availability determining component  1635 , and a transmitting component  1640 . 
     The receiving component  1625  may receive a channel interlace configuration for transmissions by the UE in a shared radio frequency spectrum band. In some cases, performing the per-interlace LBT procedure may include receiving an indication of a starting OFDM symbol for the UE. 
     The measuring component  1630  may perform a per-interlace LBT procedure by measuring an energy level of at least a portion of a channel interlace of the shared radio frequency spectrum band based on the received channel interlace configuration. The measuring component  1630  may determine an energy level of a second channel interlace adjacent to the channel interlace, where the filler signal may be transmitted based on the energy level of the second channel interlace. The measuring component  1630  may perform a full-interlace LBT procedure by measuring an energy level of a full-channel interlace of the shared radio frequency spectrum band. In some cases, performing the per-interlace LBT procedure may include measuring the energy level of a subset of resource elements (REs) of the portion of the channel interlace.  
     The availability determining component  1635  may determine an availability of the channel interlace based on the per-interlace LBT procedure. 
     Transmitting component  1640  may transmit over the channel interlace based on the determined availability and transmit a filler signal following the per-interlace LBT procedure and prior to the indicated starting OFDM symbol based on a result of the per-interlace LBT procedure. In some cases, the filler signal is transmitted using a subset of resource elements (REs) of the portion of the channel interlace. In some cases, the filler signal includes an extended cyclic prefix. 
     The transmitter  1620  may transmit signals generated by other components of the device. In some examples, the transmitter  1620  may be collocated with a receiver  1610  in a transceiver module. For example, the transmitter  1620  may be an example of aspects of the transceiver  1835  as described with reference to  FIG. 18 . The transmitter  1620  may utilize a single antenna or a set of antennas. 
       FIG. 17  shows a block diagram  1700  of a wireless device communications manager  1715  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The wireless device communications manager  1715  may be an example of aspects of a wireless device communications manager  1815  described with reference to  FIGS. 15, 16, and 18 . The wireless device communications manager  1715  may include a receiving component  1720 , a measuring component  1725 , an availability determining component  1730 , a transmitting component  1735 , a FFT component  1740 , and a SUL component  1745 . Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses). 
     The receiving component  1720  may receive a channel interlace configuration for transmissions by the UE in a shared radio frequency spectrum band. In some cases, performing the per-interlace LBT procedure may include receiving an indication of a starting OFDM symbol for the UE. 
     The measuring component  1725  may perform a per-interlace LBT procedure by measuring an energy level of at least a portion of a channel interlace of the shared radio frequency spectrum band based on the received channel interlace configuration. The measuring component  1725  may determine an energy level of a second channel  interlace adjacent to the channel interlace where the filler signal may be transmitted based on the energy level of the second channel interlace. The measuring component  1725  may perform a full-interlace LBT procedure by measuring an energy level of a full-channel interlace of the shared radio frequency spectrum band. In some cases, performing the per-interlace LBT procedure may include measuring the energy level of a subset of REs of the portion of the channel interlace. 
     The availability determining component  1730  may determine an availability of the channel interlace based on the per-interlace LBT procedure. 
     The transmitting component  1735  may transmit over the channel interlace based on the determined availability and transmit a filler signal following the per-interlace LBT procedure and prior to the indicated starting OFDM symbol based on a result of the per-interlace LBT procedure. In some cases, the filler signal is transmitted using a subset of REs of the portion of the channel interlace. In some cases, the filler signal includes an extended cyclic prefix. 
     The FFT component  1740  may perform the per-interlace LBT procedure. In some cases, performing the per-interlace LBT procedure may include performing a FFT on the measured energy level of at least the portion of the channel interlace. 
     SUL component  1745  may configure a SUL configuration. In some cases, the channel interlace configuration includes a SUL configuration. 
       FIG. 18  shows a diagram of a wireless communications system  1800  including a wireless device  1805  that supports partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The wireless device  1805  may be an example of aspects of a wireless device as described with reference to  FIGS. 15 through 17  or a UE  115  and/or a base station  105  as described with reference to  FIGS. 2 through 14 . The wireless device  1805  may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a wireless device communications manager  1815 , a processor  1820 , a memory  1825 , a software  1830 , a transceiver  1835 , an antenna  1840 , and an I/O controller  1845 . These components may be in electronic communication via one or more buses (e.g., bus  1810 ).  
     The processor  1820  may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor  1820  may be configured to operate a memory array using a memory controller. In other cases, a memory controller may be integrated into the processor  1820 . The processor  1820  may be configured to execute computer-readable instructions stored in a memory to perform various functions (e.g., functions or tasks supporting partial-interlace transmission for AUL transmissions). 
     The memory  1825  may include RAM and ROM. The memory  1825  may store computer-readable, computer-executable software  1830  including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory  1825  may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices. 
     The software  1830  may include code to implement aspects of the present disclosure, including code to support partial-interlace transmission techniques for AUL transmissions. The software  1830  may be stored in a non-transitory computer-readable medium such as system memory or other memory. In some cases, the software  1830  may not be directly executable by the processor but may cause a computer (e.g., when compiled and executed) to perform functions described herein. 
     The transceiver  1835  may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above. For example, the transceiver  1835  may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver  1835  may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas. 
     In some cases, the wireless device  1805  may include a single antenna  1840 . However, in some cases the device may have more than one antenna  1840 , which may be capable of concurrently transmitting or receiving multiple wireless transmissions.  
     The I/O controller  1845  may manage input and output signals for the wireless device  1805 . The I/O controller  1845  may also manage peripherals not integrated into the wireless device  1805 . In some cases, the I/O controller  1845  may represent a physical connection or port to an external peripheral. In some cases, the I/O controller  1845  may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, or another known operating system. In other cases, the I/O controller  1845  may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I/O controller  1845  may be implemented as part of a processor. In some cases, a user may interact with the wireless device  1805  via the I/O controller  1845  or via hardware components controlled by the I/O controller  1845 . 
       FIG. 19  shows a flowchart illustrating a method  1900  for partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The operations of the method  1900  may be implemented by a UE  115  or its components as described herein. For example, the operations of the method  1900  may be performed by a UE communications manager as described with reference to  FIGS. 7 through 10 . In some examples, a UE  115  may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE  115  may perform aspects of the functions described below using special-purpose hardware. 
     At  1905 , the UE  115  may receive a partial bandwidth configuration for uplink transmissions by the UE, where the partial bandwidth configuration may indicate a channel interlace and a portion of a channel bandwidth. The operations of  1905  may be performed according to the methods described herein. In certain examples, aspects of the operations of  1905  may be performed by a receiving component as described with reference to  FIGS. 7 through 10 . 
     At  1910 , the UE  115  may receive an AUL configuration including a group identifier. The operations of  1910  may be performed according to the methods described herein. In certain examples, aspects of the operations of  1910  may be performed by a receiving component as described with reference to  FIGS. 7 through 10 . 
     At  1915 , the UE  115  may determine a starting offset with respect to an AUL subframe for a partial bandwidth transmission by the UE based on the group identifier.  The operations of  1915  may be performed according to the methods described herein. In certain examples, aspects of the operations of  1915  may be performed by a starting offset component as described with reference to  FIGS. 7 through 10 . 
     At  1920 , the UE  115  may perform the partial bandwidth transmission according to the determined starting offset over the channel interlace and the portion of the channel bandwidth. The operations of  1920  may be performed according to the methods described herein. In certain examples, aspects of the operations of  1920  may be performed by a transmitting component as described with reference to  FIGS. 7 through 10 . 
       FIG. 20  shows a flowchart illustrating a method  2000  for partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The operations of the method  2000  may be implemented by a base station  105  or its components as described herein. For example, the operations of the method  2000  may be performed by a base station communications manager as described with reference to  FIGS. 11 through 14 . In some examples, a base station  105  may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the base station  105  may perform aspects of the functions described below using special-purpose hardware. 
     At  2005 , the base station  105  may transmit, to a first UE of a first group of one or more UEs, a first partial bandwidth configuration, the first partial bandwidth configuration indicating a first channel interlace and a first portion of a channel bandwidth. The operations of  2005  may be performed according to the methods described herein. In certain examples, aspects of the operations of  2005  may be performed by a transmitting component as described with reference to  FIGS. 11 through 14 . 
     At  2010 , the base station  105  may transmit to the first UE a first AUL configuration including a first group identifier. The operations of  2010  may be performed according to the methods described herein. In certain examples, aspects of the operations of  2010  may be performed by a transmitting component as described with reference to  FIGS. 11 through 14 .  
     At  2015 , the base station  105  may receive a first partial bandwidth transmission from the first UE at a first starting offset with respect to an AUL subframe, where the first starting offset may be based on the first group identifier. The operations of  2015  may be performed according to the methods described herein. In certain examples, aspects of the operations of  2015  may be performed by a receiving component as described with reference to  FIGS. 11 through 14 . 
       FIG. 21  shows a flowchart illustrating a method  2100  for partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The operations of the method  2100  may be implemented by a base station  105  or its components as described herein. For example, the operations of the method  2100  may be performed by a base station communications manager as described with reference to  FIGS. 11 through 14 . In some examples, a base station  105  may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the base station  105  may perform aspects of the functions described below using special-purpose hardware. 
     At  2105 , the base station  105  may transmit, to a first UE of a first group of one or more UEs, a first partial bandwidth configuration, where the first partial bandwidth configuration may indicate a first channel interlace and a first portion of a channel bandwidth. The operations of  2105  may be performed according to the methods described herein. In certain examples, aspects of the operations of  2105  may be performed by a transmitting component as described with reference to  FIGS. 11 through 14 . 
     At  2110 , the base station  105  may transmit to a second UE a second partial bandwidth configuration, where the second partial bandwidth configuration may indicate a second channel interlace. In some cases, the second partial bandwidth transmission may be received over the second channel interlace and the first portion of the channel bandwidth. The operations of  2110  may be performed according to the methods described herein. In certain examples, aspects of the operations of  2110  may be performed by a transmitting component as described with reference to  FIGS. 11 through 14 . 
     At  2115 , the base station  105  may transmit to the first UE a first AUL configuration including a first group identifier. The operations of  2115  may be  performed according to the methods described herein. In certain examples, aspects of the operations of  2115  may be performed by a transmitting component as described with reference to  FIGS. 11 through 14 . 
     At  2120 , the base station  105  may receive a first partial bandwidth transmission from the first UE at a first starting offset with respect to an AUL subframe where the first starting offset may be based on the first group identifier. The operations of  2120  may be performed according to the methods described herein. In certain examples, aspects of the operations of  2120  may be performed by a receiving component as described with reference to  FIGS. 11 through 14 . 
     At  2125 , the base station  105  may receive a second partial bandwidth transmission from a second UE of the first group of one or more UEs, where the second partial bandwidth transmission may be received at the first starting offset with respect to the AUL subframe. The operations of  2125  may be performed according to the methods described herein. In certain examples, aspects of the operations of  2125  may be performed by a receiving component as described with reference to  FIGS. 11 through 14 . 
       FIG. 22  shows a flowchart illustrating a method  2200  for partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The operations of the method  2200  may be implemented by a base station  105  or its components as described herein. For example, the operations of the method  2200  may be performed by a base station communications manager as described with reference to  FIGS. 11 through 14 . In some examples, a base station  105  may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the base station  105  may perform aspects of the functions described below using special-purpose hardware. 
     At  2205 , the base station  105  may transmit, to a first UE of a first group of one or more UEs, a first partial bandwidth configuration, where the first partial bandwidth configuration may indicate a first channel interlace and a first portion of a channel bandwidth. The operations of  2205  may be performed according to the methods described herein. In certain examples, aspects of the operations of  2205  may be performed by a transmitting component as described with reference to  FIGS. 11 through 14 .  
     At  2210 , the base station  105  may transmit to the first UE a first AUL configuration including a first group identifier. The operations of  2210  may be performed according to the methods described herein. In certain examples, aspects of the operations of  2210  may be performed by a transmitting component as described with reference to  FIGS. 11 through 14 . 
     At  2215 , the base station  105  may receive a first partial bandwidth transmission from the first UE at a first starting offset with respect to an AUL subframe, where the first starting offset may be based on the first group identifier. The operations of  2215  may be performed according to the methods described herein. In certain examples, aspects of the operations of  2215  may be performed by a receiving component as described with reference to  FIGS. 11 through 14 . 
     At  2220 , the base station  105  may receive a second partial bandwidth transmission from a second UE of a second group of one or more UEs, where the second partial bandwidth transmission may be received at a second starting offset with respect to the AUL subframe. The operations of  2220  may be performed according to the methods described herein. In certain examples, aspects of the operations of  2220  may be performed by a receiving component as described with reference to  FIGS. 11 through 14 . 
       FIG. 23  shows a flowchart illustrating a method  2300  for partial-interlace transmission techniques for AUL transmissions in accordance with aspects of the present disclosure. The operations of the method  2300  may be implemented by a wireless device as described with reference to  FIGS. 15 through 18  or a UE  115  and/or a base station  105  as described with reference to  FIGS. 2 through 14 and 19 through 22 . For example, the operations of the method  2300  may be performed by a wireless device communications manager as described with reference to  FIGS. 15 through 18 . In some examples, a wireless device may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the wireless device may perform aspects of the functions described below using special-purpose hardware. 
     At  2305 , the wireless device may receive a channel interlace configuration for transmissions by the UE in a shared radio frequency spectrum band. The operations of  2305  may be performed according to the methods described herein. In certain  examples, aspects of the operations of  2305  may be performed by a receiving component as described with reference to  FIGS. 15 through 18 . 
     At  2310 , the wireless device may perform a per-interlace LBT procedure by measuring an energy level of at least a portion of a channel interlace of the shared radio frequency spectrum band based on the received channel interlace configuration. The operations of  2310  may be performed according to the methods described herein. In certain examples, aspects of the operations of  2310  may be performed by a measuring component as described with reference to  FIGS. 15 through 18 . 
     At  2315 , the wireless device may determine an availability of the channel interlace based on the per-interlace LBT procedure. The operations of  2315  may be performed according to the methods described herein. In certain examples, aspects of the operations of  2315  may be performed by a availability determining component as described with reference to  FIGS. 15 through 18 . 
     At  2320 , the wireless device may transmit over the channel interlace based on the determined availability. The operations of  2320  may be performed according to the methods described herein. In certain examples, aspects of the operations of  2320  may be performed by a transmitting component as described with reference to  FIGS. 15 through 18 . 
     In some examples, aspects from two or more of the described methods may be combined. It should be noted that the described methods are just example implementations, and that the operations of the described methods may be rearranged or otherwise modified such that other implementations are possible. 
     Techniques described herein may be used for various wireless communications systems such as code-division multiple access (CDMA), time-division multiple access (TDMA), frequency-division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), single carrier FDMA (SC-FDMA), and other systems. A CDMA system may implement a radio technology such as CDMA2000, UTRA, etc. CDMA2000 covers IS-2000, IS-95, and IS-856 standards. IS-2000 Releases may be commonly referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other variants of  CDMA. A TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM). 
     An OFDMA system may implement a radio technology such as Ultra Mobile Broadband (UMB), E-UTRA, Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR, and GSM are described in documents from the organization named “3rd Generation Partnership Project” (3GPP). CDMA2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2). The techniques described herein may be used for the systems and radio technologies mentioned above as well as other systems and radio technologies. While aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR applications. 
     A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs  115  with service subscriptions with the network provider. A small cell may be associated with a lower-powered base station  105 , as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed, etc.) frequency bands as macro cells. Small cells may include pico cells, femto cells, and micro cells according to various examples. A pico cell, for example, may cover a small geographic area and may allow unrestricted access by UEs  115  with service subscriptions with the network provider. A femto cell may also cover a small geographic area (e.g., a home) and may provide restricted access by UEs  115  having an association with the femto cell (e.g., UEs  115  in a closed subscriber group (CSG), UEs  115  for users in the home, and the like). An eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB. An eNB may support one or multiple (e.g., two, three, four, and the like) cells, and may also support communications using one or multiple component carriers.  
     The wireless communications system  100  or systems described herein may support synchronous or asynchronous operation. For synchronous operation, the base stations  105  may have similar frame timing, and transmissions from different base stations  105  may be approximately aligned in time. For asynchronous operation, the base stations  105  may have different frame timing, and transmissions from different base stations  105  may not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operations. 
     Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof 
     The various illustrative blocks and modules described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a FPGA or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration). 
     Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can comprise RAM, ROM, electrically erasable programmable read only memory (EEPROM), compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data  structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media. 
     The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the disclosure and appended claims. For example, due to the nature of software, functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations. As used herein, including in the claims, the term “and/or,” when used in a list of two or more items, means that any one of the listed items can be employed by itself, or any combination of two or more of the listed items can be employed. For example, if a composition is described as containing components A, B, and/or C, the composition can contain A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B, and C in combination. Also, as used herein, including in the claims, “or” as used in a list of items (for example, a list of items prefaced by a phrase such as “at least one of” or “one or more of”) indicates an inclusive list such that, for example, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: A, B, or C” is intended to cover A, B, C, A-B, A-C, B-C, and A-B-C., as well as any combination with multiples of the same  element (e.g., A-A A-A-A, A-A-B, A-A-C, A-B-B, A-C-C, B-B, B-B-B, B-B-C, C-C, and C-C-C or any other ordering of A, B, and C). 
     As used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an exemplary feature that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on.” 
     In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label. 
     The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “exemplary” used herein means “serving as an example, instance, or illustration,” and not “preferred” or “advantageous over other examples.” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples. 
     The description herein is provided to enable a person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein, but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.