Patent Description:
Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (for example, bandwidth, transmit power, etc.).

New radio (for example, <NUM> NR) is an example of an emerging telecommunication standard.

3GPP contribution <NPL>, provides a discussion on Mode <NUM> resource allocation for NR V2X. 3GPP contribution <NPL>, discusses assistance information from receiver, taking into account sensing and feedback.

Preferred embodiments of the invention are stipulated in the dependent claims.

The systems, methods, and devices of the disclosure each have several innovative aspects, no single one of which is solely responsible for the desirable attributes. After considering this discussion, and particularly after reading the section entitled "Detailed Description" one will understand how the features of this disclosure provide advantages that include improved selection of resources from a transmit resource pool.

Aspects of the disclosure can be implemented in a method for wireless communication. The method generally includes selecting, from a resource pool allocated for sidelink data transmission from a second wireless device to the first wireless device, a subset of the resource pool for the sidelink data transmission. The method generally includes transmitting an indication to the second wireless device of the selected subset of the resource pool. The method generally includes monitoring the subset of the resource pool for the sidelink data transmission.

Aspects of the disclosure can be implemented in a method for wireless communication by an apparatus. The method generally includes receiving, from a first wireless device, an indication of a subset of a resource pool allocated for sidelink data transmission from the second wireless device to the first wireless device. The method generally includes sending the sidelink data transmission to the first wireless device on the subset of the resource pool.

Aspects of the disclosure can be implemented in an apparatus for wireless communication. The apparatus generally includes at least one processor configured to select, from a resource pool allocated for sidelink data transmission from a second wireless device to the first wireless device, a subset of the resource pool for the sidelink data transmission. The at least one processor is configured to transmit an indication to the second wireless device of the selected subset of the resource pool. The at least one processor is configured to monitor the subset of the resource pool for the sidelink data transmission. The apparatus generally includes a memory coupled with the at least one processor.

Aspects of the disclosure can be implemented in an apparatus for wireless communication. The apparatus generally includes at least one processor configured to receive, from a first wireless device, an indication of a subset of a resource pool allocated for sidelink data transmission from the second wireless device to the first wireless device. The at least one processor is configured to send the sidelink data transmission to the first wireless device on the subset of the resource pool. The apparatus generally includes a memory coupled with the at least one processor.

Aspects of the disclosure can be implemented in an apparatus for wireless communication. The apparatus generally includes means for selecting, from a resource pool allocated for sidelink data transmission from a second wireless device to the first wireless device, a subset of the resource pool for the sidelink data transmission. The apparatus generally includes means for transmitting an indication to the second wireless device of the selected subset of the resource pool. The apparatus generally includes means for monitoring the subset of the resource pool for the sidelink data transmission.

Aspects of the disclosure can be implemented in an apparatus for wireless communication. The apparatus generally includes means for receiving, from a first wireless device, an indication of a subset of a resource pool allocated for sidelink data transmission from the second wireless device to the first wireless device. The apparatus generally includes means for sending the sidelink data transmission to the first wireless device on the subset of the resource pool.

Aspects of the disclosure can be implemented in a computer readable medium storing computer executable code thereon for wireless communication. The computer readable medium generally includes code for selecting, from a resource pool allocated for sidelink data transmission from a second wireless device to the first wireless device, a subset of the resource pool for the sidelink data transmission. The computer readable medium generally includes code for transmitting an indication to the second wireless device of the selected subset of the resource pool. The computer readable medium generally includes code for monitoring the subset of the resource pool for the sidelink data transmission.

Aspects of the disclosure can be implemented in a computer readable medium storing computer executable code thereon for wireless communication. The computer readable medium generally includes code for receiving, from a first wireless device, an indication of a subset of a resource pool allocated for sidelink data transmission from the second wireless device to the first wireless device. The computer readable medium generally includes code for sending the sidelink data transmission to the first wireless device on the subset of the resource pool.

The following description and the appended drawings set forth in detail some illustrative features of the one or more aspects.

However, the accompanying drawings illustrate only some typical aspects of this disclosure and are therefore not to be considered limiting of its scope.

Aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for managing resources for sidelink transmissions between sidelink devices, such as between sidelink user equipments (UEs). As will be described, the techniques presented herein allow a data receiving UE to select a subset of available sidelink transmit resources. This flexibility may allow the data receiving UE to optimize resource utilization, for example, freeing up a remaining subset of resources for other purposes (e.g., receiving data from another UE or transmitting its own data).

The following description provides examples of selection of sidelink resources from a transmit resource pool, and is not limiting of the scope, applicability, or examples set forth in the claims.

The techniques described herein may be used for various wireless networks and radio technologies. While aspects may be described herein using terminology commonly associated with <NUM>, <NUM>, and/or new radio (e.g., 5GNR) wireless technologies, aspects of the present disclosure can be applied in other generation-based communication systems.

NR access (for example, <NUM> NR) may support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth, millimeter wave (mmWave) targeting high carrier frequency, massive machine type communications MTC (mMTC) targeting non-backward compatible MTC techniques, or mission critical services targeting ultra-reliable low-latency communications (URLLC). In addition, these services may coexist in the same time-domain resource (for example, a slot or subframe) or frequency-domain resource (for example, component carrier).

For example, as shown in <FIG>, UE 120a and/or UE 120b may include a Sidelink Resource Manager (122a, 122b), that may be configured to perform operations to manage resources for sidelink transmissions as described herein.

As shown in <FIG>, the wireless communication network <NUM> may be in communication with a core network <NUM>. The core network <NUM> may in communication with one or more base station (BSs) <NUM>10a-z (each also individually referred to herein as BS <NUM> or collectively as BSs <NUM>) and/or user equipment (UE) 120a-y (each also individually referred to herein as UE <NUM> or collectively as UEs <NUM>) in the wireless communication network <NUM> via one or more interfaces.

In some examples, the BSs <NUM> may be interconnected to one another or to one or more other BSs or network nodes (not shown) in wireless communication network <NUM> through various types of backhaul interfaces (for example, a direct physical connection, a wireless connection, a virtual network, or the like) using any suitable transport network.

The BSs <NUM> communicate with UEs <NUM> in the wireless communication network <NUM>. The UEs <NUM> may be dispersed throughout the wireless communication network <NUM>, and each UE <NUM> may be stationary or mobile.

Wireless communication network <NUM> may also include relay stations (for example, relay station <NUM>10r), also referred to as relays or the like, that receive a transmission of data or other information from an upstream station (for example, a BS 110a or a UE 120r) and sends a transmission of the data or other information to a downstream station (for example, a UE <NUM> or a BS <NUM>), or that relays transmissions between UEs <NUM>, to facilitate communication between devices.

In aspects, the network controller <NUM> may be in communication with a core network <NUM> (e.g., a <NUM> Core Network (5GC)), which provides various network functions such as Access and Mobility Management, Session Management, User Plane Function, Policy Control Function, Authentication Server Function, Unified Data Management, Application Function, Network Exposure Function, Network Repository Function, Network Slice Selection Function, etc..

<FIG> illustrates example components of BS 110a and UE 120a (e.g., the wireless communication network <NUM> of <FIG>), which may be used to implement aspects of the present disclosure.

At the BS 110a, a transmit processor <NUM> may receive data from a data source <NUM> and control information from a controller/processor <NUM>. The control information may be for the physical broadcast channel (PBCH), physical control format indicator channel (PCFICH), physical hybrid ARQ indicator channel (PHICH), physical downlink control channel (PDCCH), group common PDCCH (GC PDCCH), etc. The data may be for the physical downlink shared channel (PDSCH), etc. The processor <NUM> may process (for example, encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. The transmit processor <NUM> may also generate reference symbols, such as for the primary synchronization signal (PSS), secondary synchronization signal (SSS), and channel state information reference signal (CSI-RS). A transmit (TX) multiple-input multiple-output (MIMO) processor <NUM> may perform spatial processing (for example, precoding) on the data symbols, the control symbols, or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) in transceivers 232a-232t. Each modulator may process a respective output symbol stream (for example, for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (for example, convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. Downlink signals from the modulators in transceivers 232a-232t may be transmitted via the antennas 234a-234t, respectively.

At the UE <NUM>, the antennas 252a-252r may receive the downlink signals from the BS <NUM> a (or sidelink signals from a sidelink device, such as UE 120b) and may provide received signals to the demodulators (DEMODs) in transceivers 254a-254r, respectively. Each demodulator may condition (for example, filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator may further process the input samples (for example, for OFDM, etc.) to obtain received symbols. A MIMO detector <NUM> may obtain received symbols from all the demodulators in transceivers 254a-254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor <NUM> may process (for example, demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120a to a data sink <NUM>, and provide decoded control information to a controller/processor <NUM>.

On the uplink or sidelink, at UE 120a, a transmit processor <NUM> may receive and process data (for example, for the physical uplink shared channel (PUSCH) or the physical sidelink shared channel (PSSCH)) from a data source <NUM> and control information (for example, for the physical uplink control channel (PUCCH) or physical sidelink control channel (PSCCH)) from the controller/processor <NUM>. The transmit processor <NUM> may also generate reference symbols for a reference signal (for example, for the sounding reference signal (SRS) or channel state information reference signal (CSI-RS)). The symbols from the transmit processor <NUM> may be precoded by a TX MIMO processor <NUM> if applicable, further processed by the modulators in transceivers 254a-254r (for example, for SC-FDM, etc.), and transmitted to the BS 110a or sidelink UE 120b. At the BS 110a, the uplink signals from the UE 120a may be received by the antennas <NUM>, processed by the demodulators <NUM>, detected by a MIMO detector <NUM> if applicable, and further processed by a receive processor <NUM> to obtain decoded data and control information sent by the UE 120a.

A scheduler <NUM> may schedule UEs for data transmission on the downlink or uplink.

Antennas <NUM>, processors <NUM>, <NUM>, <NUM>, and/or controller/processor <NUM> of the UE 120a and/or antennas <NUM>, processors <NUM>, <NUM>, <NUM>, and/or controller/processor <NUM> of the BS 110a may be used to perform the various techniques and methods described herein. As shown in <FIG>, the controller/processor <NUM> of the UE 120a has a Sidelink Resource Manager <NUM> that may be configured to select a subset of sidelink resources for receiving data and/or determine what sidelink resources to use for a sidelink transmissions to another UE. Although shown at the Controller/Processor, other components of the UE may be used to perform the operations described herein.

Each subframe may include a variable number of slots (e.g., <NUM>, <NUM>, <NUM>, <NUM>, <NUM>,. slots) depending on the SCS. Each slot may include a variable number of symbol periods (e.g., <NUM>, <NUM>, or <NUM> symbols) depending on the SCS. A sub-slot structure refers to a transmit time interval having a duration less than a slot (e.g., <NUM>, <NUM>, or <NUM> symbols).

In some circumstances, two or more subordinate entities (for example, UEs) may communicate with each other using sidelink signals. As described above, vehicle-to-vehicle (V2V) and vehicle-to-everything (V2X) communications are examples of communications that may be transmitted via a sidelink. Other applications of sidelink communications may include public safety or service announcement communications, communications for proximity services, communications for UE-to-network relaying, device-to-device (D2D) communications, Internet of Everything (IoE) communications, Internet of Things (IoT) communications, mission-critical mesh communications, among other suitable applications. Generally, a sidelink may refer to a direct link between one subordinate entity (for example, UE1) and another subordinate entity (for example, UE2). As such, a sidelink may be used to transmit and receive a communication (also referred to herein as a "sidelink signal") without relaying the communication through a scheduling entity (for example, a BS), even though the scheduling entity may be utilized for scheduling or control purposes. In some examples, a sidelink signal may be communicated using a licensed spectrum (unlike wireless local area networks, which typically use an unlicensed spectrum).

Various sidelink channels may be used for sidelink communications, including a physical sidelink discovery channel (PSDCH), a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), and a physical sidelink feedback channel (PSFCH). The PSDCH may carry discovery expressions that enable proximal devices to discover each other. The PSCCH may carry control signaling such as sidelink resource configurations and other parameters used for data transmissions, and the PSSCH may carry the data transmissions. The PSFCH may carry feedback such as channel state information (CSI) related to a sidelink channel quality.

<FIG> and <FIG> show diagrammatic representations of example vehicle to everything (V2X) systems in accordance with some aspects of the present disclosure. For example, the vehicles shown in <FIG> and <FIG> may communicate via sidelink channels and may perform sidelink CSI reporting as described herein.

The V2X systems, provided in <FIG> and <FIG> provide two complementary transmission modes. A first transmission mode, shown by way of example in <FIG>, involves direct communications (for example, also referred to as side link communications) between participants in proximity to one another in a local area. A second transmission mode, shown by way of example in <FIG>, involves network communications through a network, which may be implemented over a Uu interface (for example, a wireless communication interface between a radio access network (RAN) and a UE).

Referring to <FIG>, a V2X system <NUM> (for example, including vehicle to vehicle (V2V) communications) is illustrated with two vehicles <NUM>, <NUM>. The first transmission mode allows for direct communication between different participants in a given geographic location. As illustrated, a vehicle can have a wireless communication link <NUM> with an individual (vehicle-to-person (V2P)) (for example, via a UE) through a PC5 interface. Communications between the vehicles <NUM> and <NUM> may also occur through a PC5 interface <NUM>. In a like manner, communication may occur from a vehicle <NUM> to other highway components (for example, highway component <NUM>), such as a traffic signal or sign (V2I) through a PC5 interface <NUM>. With respect to each communication link illustrated in <FIG>, two-way communication may take place between elements, therefore each element may be a transmitter and a receiver of information. The V2X system <NUM> may be a self-managed system implemented without assistance from a network entity. A self-managed system may enable improved spectral efficiency, reduced cost, and increased reliability as network service interruptions do not occur during handover operations for moving vehicles. The V2X system may be configured to operate in a licensed or unlicensed spectrum, thus any vehicle with an equipped system may access a common frequency and share information. Such harmonized/common spectrum operations allow for safe and reliable operation.

<FIG> shows a V2X system <NUM> for communication between a vehicle <NUM> and a vehicle <NUM> through a network entity <NUM>. These network communications may occur through discrete nodes, such as a base station (for example, an eNB or gNB), that sends and receives information to and from (for example, relays information between) vehicles <NUM>, <NUM>. The network communications through vehicle to network (V2N) links <NUM> and <NUM> may be used, for example, for long range communications between vehicles, such as for communicating the presence of a car accident a distance ahead along a road or highway. Other types of communications may be sent by the node to vehicles, such as traffic flow conditions, road hazard warnings, environmental/weather reports, and service station availability, among other examples. Such data can be obtained from cloud-based sharing services.

As discussed above, aspects of the present disclosure relate to managing resources for sidelink transmissions between two UEs.

In some systems, on the Uu interface (i.e., the access link), scheduling for data transmissions for both uplink and downlink is done by the BS (e.g., the gNB in NR). In sidelink systems, the relationship between the sidelink UEs is more symmetric. For example, in LTE sidelink and NR sidelink V2X, the data-transmitting UE typically performs the scheduling. The data-transmitting UE may select the resources for data transmissions from a configured resource pool. For example, the data-transmitting UE may select resources from a set of resources configured by the gNB for sidelink.

In some scenarios, however, the data-receiving UE may prefer to receive data on certain resources (e.g., a subset) of the configured resource pool for various reasons. For example, a data-receiving UE may prefer certain resources because of interference or other considerations. Such considerations may include, for example, a lack of reception processing resources, low battery power, attempts to allow more discontinuous reception (DRX), intention to transmit on the rest of the configured resource pool, intention to receive on another beam of the configured resource pool, and the like.

Thus, allowing a UE receiving data in a sidelink channel to dynamically select transmit resources from a transmit resource pool may provide desired flexibility.

Aspects of the present disclosure provide example selecting resources from a transmit resource pool by a receiver user equipment (UE) in sidelink. According to certain aspects, a UE receiving data in a sidelink channel may dynamically select transmit resources from a transmit sidelink resource pool for the UE(s) transmitting data. The data receiving UE may indicate the selected transmit resources to the UE(s) transmitting data. In this manner, the data receiving UE may be able to optimize resource utilization. For example, optimizing resource utilization may include freeing up a remaining subset of resources for other purposes, such as receiving data from another UE or transmitting its own data.

<FIG> is a flow diagram illustrating example operations <NUM> for wireless communication, in accordance with certain aspects of the present disclosure. The operations <NUM> may be performed, for example, by a first sidelink device, such as a UE (e.g., by a UE 120a of <FIG> for selecting a subset of the resource pool for sidelink transmission to a UE 120b). The operations <NUM> may be implemented as software components that are executed and run on one or more processors (e.g., controller/processor <NUM> of <FIG>). Further, the transmission and reception of signals by the UE in operations <NUM> may be enabled, for example, by one or more antennas (e.g., antennas <NUM> of <FIG>). In certain aspects, the transmission and/or reception of signals by the UE may be implemented via a bus interface of one or more processors (e.g., controller/processor <NUM>) obtaining and/or outputting signals.

Operations <NUM> begin, at <NUM>, as claimed, by selecting, from a resource pool allocated for sidelink data transmission from a second wireless device to the first wireless device, a subset of the resource pool for the sidelink data transmission. At <NUM>, as claimed, the first wireless device transmits an indication to the second wireless device of the selected subset of the resource pool. At <NUM>, as claimed, the first wireless device monitors the subset of the resource pool for the sidelink data transmission.

<FIG> is a flow diagram illustrating example operations <NUM> for wireless communication, in accordance with certain aspects of the present disclosure. The operations <NUM> may be performed, for example, by an apparatus, such as a UE (e.g., by a UE 120b of <FIG> to send sidelink transmissions to UE 120a using resources selected from a resource pool by UE 120a). The operations <NUM> may be implemented as software components that are executed and run on one or more processors (e.g., controller/processor <NUM> of <FIG>). Further, the transmission and reception of signals by the UE in operations <NUM> may be enabled, for example, by one or more antennas (e.g., antennas <NUM> of <FIG>). In certain aspects, the transmission and/or reception of signals by the UE may be implemented via a bus interface of one or more processors (e.g., controller/processor <NUM>) obtaining and/or outputting signals.

Operations <NUM> begin, at <NUM>, as claimed, by receiving, from a first wireless device, and indication of a subset of a resource pool allocated for sidelink data transmission from the second wireless device to the first wireless device. At <NUM>, as claimed, the apparatus sends the sidelink data transmission to the first wireless device on the subset of the resource pool.

Operations <NUM> and <NUM> of <FIG> and <FIG> may be understood with reference to the call flow diagram of <FIG>. As illustrated, at <NUM>, a transmit resource pool for sidelink communications between UE A <NUM> and UE B <NUM> may be configured at the UE A. For example, the transmit resource pool may be configured by a gNB. In the illustrated example, at <NUM>, UE B informs UE A about a selected subset of the transmit resource pool. For example, UE B may indicate a restriction to the transmit resource pool (e.g., such as resources not to be used for transmission to UE B). At <NUM>, UE A then transmits data to the UE B on the indicated subset of the transmit resource pool.

In some cases, the decision to restrict the transmit resource pool may be based on various considerations. These considerations may include: an interference measurement, intention to transmit on the rest of the pool, or intention to receive from other UEs (maybe on another beam) on the rest of the pool, which may be based on a measurement or feedback mechanism from other UEs. For example, if certain resources are interfered, the receiving UE may indicate for the transmitting UE to use different resources than the interfered ones. If the receiving UE intends to receive from other UEs, the receiving UE may indicate to the transmitting UE to use difference than those intended for the other UEs.

In some cases, the selection of transmit resources from the transmit resource pool is based on a combination of the above selection criteria and/or other considerations. As noted above, such other considerations may include a lack of receiving processing resources at any particular time, low battery power, or an attempt to allow more discontinuous reception (DRX) for power savings. For example, if the receiving UE has low processing resources and/or low battery power at a time, the receiving UE may indicate the transmitting UE to use few or no resources for transmitting to the receiving UE at that time, in order to conserve processing resources or battery power. The ability of the data-receiving UE to dynamically select resources may allow the UE to adapt to changes in these conditions. For example, the UE may select more resources as processing resources free up, battery life increases, or channel conditions change.

In some cases, the data-receiving UEs (e.g., UE B) may signal the selected resources to the data-transmitting UE (e.g., UE A) using explicit signaling. For example, explicit signaling may include sidelink control information (SCI). In some cases, the selection may be signaled implicitly. For example, the data-receiving UE can implicitly signal resource selection via a parameter of the CSI report (e.g., a certain value in CQI, which indicates non-transmissions on certain resources).

The SCI from the data-receiving UE may schedule the physical sidelink shared channel (PSSCH) from the data-transmitting UE. The SCI from the data-receiving UE partially schedules, as claimed, the PSSCH from the data-transmitting UE by selecting a first set of parameters. The first set of parameters may include a modulation and coding scheme (MCS), a beam, a resource pool subset, and/or other scheduling parameters. The data-transmitting UE can complete scheduling the physical sidelink control channel (PSCCH) by selecting remaining scheduling parameters. In such cases, the data-transmitting UE signals, as claimed, these remaining parameters using its SCI carried by PSCCH.

By providing a mechanism that allows a data-receiving UE in sidelink to dynamically select a subset of resources from a transmit resource pool for receiving the sidelink data, the UE may be able to optimize resource utilization to adapt to a variety of changing conditions.

The communications device <NUM> includes a processing system <NUM> coupled to a transceiver <NUM> (e.g., a transmitter and/or a receiver).

The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium/memory <NUM> via a bus <NUM>. In certain aspects, the computer-readable medium/memory <NUM> is configured to store instructions (e.g., computer-executable code) that when executed by the processor <NUM>, cause the processor <NUM> to perform the operations illustrated in <FIG>, or other operations for performing the various techniques discussed herein for managing transmit resources in a sidelink channel by a receiver. In certain aspects, computer-readable medium/memory <NUM> stores code <NUM> for selecting, from a resource pool allocated for sidelink data transmission from a second wireless device to the first wireless device, a subset of the resource pool for the sidelink data transmission; code <NUM> for transmitting an indication to the second wireless device of the selected subset of the resource pool; and code <NUM> for monitoring the subset of the resource pool for the sidelink data transmission. In certain aspects, the processor <NUM> has circuitry configured to implement the code stored in the computer-readable medium/memory <NUM>. The processor <NUM> includes circuitry <NUM> for selecting, from a resource pool allocated for sidelink data transmission from a second wireless device to the first wireless device, a subset of the resource pool for the sidelink data transmission; circuitry <NUM> for transmitting an indication to the second wireless device of the selected subset of the resource pool; and circuitry <NUM> for monitoring the subset of the resource pool for the sidelink data transmission.

The processing system <NUM> includes a processor <NUM> coupled to a computer-readable medium/memory <NUM> via a bus <NUM>. In certain aspects, the computer-readable medium/memory <NUM> is configured to store instructions (e.g., computer-executable code) that when executed by the processor <NUM>, cause the processor <NUM> to perform the operations illustrated in <FIG>, or other operations for performing the various techniques discussed herein for managing transmit resources in a sidelink channel by a receiver. In certain aspects, computer-readable medium/memory <NUM> stores code <NUM> for receiving, from a first wireless device, an indication of a subset of a resource pool allocated for sidelink data transmission from the second wireless device to the first wireless device; and code <NUM> for sending the sidelink data transmission to the first wireless device on the subset of the resource pool. In certain aspects, the processor <NUM> has circuitry configured to implement the code stored in the computer-readable medium/memory <NUM>. The processor <NUM> includes circuitry <NUM> for receiving, from a first wireless device, an indication of a subset of a resource pool allocated for sidelink data transmission from the second wireless device to the first wireless device; and circuitry <NUM> for sending the sidelink data transmission to the first wireless device on the subset of the resource pool.

The techniques described herein may be used for various wireless communication technologies, such as NR (for example, <NUM> NR), 3GPP Long Term Evolution (LTE), LTE-Advanced (LTE-A), code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single-carrier frequency division multiple access (SC-FDMA), time division synchronous code division multiple access (TD-SCDMA), and other networks.

In 3GPP, the term "cell" can refer to a coverage area of a Node B (NB) or a NB subsystem serving this coverage area, depending on the context in which the term is used. A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, or other types of cells. A macro cell may cover a relatively large geographic area (for example, several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (for example, a home) and may allow restricted access by UEs having an association with the femto cell (for example, UEs in a Closed Subscriber Group (CSG), UEs for users in the home, etc.).

A UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, a Customer Premises Equipment (CPE), a cellular phone, a smart phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, an appliance, a medical device or medical equipment, a biometric sensor/device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wrist band, smart jewelry (for example, a smart ring, a smart bracelet, etc.), an entertainment device (for example, a music device, a video device, a satellite radio, etc.), a vehicular component or sensor, a smart meter/sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that may communicate with a BS, another device (for example, remote device), or some other entity. A wireless node may provide, for example, connectivity for or to a network (for example, a wide area network such as Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered Internet-of Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

A scheduling entity (for example, a BS) allocates resources for communication among some or all devices and equipment within its service area or cell. In some examples, a UE may function as a scheduling entity and may schedule resources for one or more subordinate entities (for example, one or more other UEs), and the other UEs may utilize the resources scheduled by the UE for wireless communication. In some examples, a UE may function as a scheduling entity in a peer-to-peer (P2P) network, or in a mesh network.

As used herein, the term "determining" may encompass one or more of a wide variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, looking up (for example, looking up in a table, a database or another data structure), assuming and the like. Also, "determining" may include receiving (for example, receiving information), accessing (for example, accessing data in a memory) and the like.

As used herein, "or" is used intended to be interpreted in the inclusive sense, unless otherwise explicitly indicated. For example, "a or b" may include a only, b only, or a combination of a and b. As used herein, a phrase referring to "at least one of" or "one or more of" a list of items refers to any combination of those items, including single members. For example, "at least one of: a, b, or c" is intended to cover the possibilities of: a only, b only, c only, a combination of a and b, a combination of a and c, a combination of b and c, and a combination of a and b and c.

Additionally, various features that are described in this specification in the context of separate implementations also can be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation also can be implemented in multiple implementations separately or in any suitable subcombination. As such, although features may be described above as acting in particular combinations, and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.

Claim 1:
A method for wireless communication by a first wireless device, the method comprising:
selecting (<NUM>), from a resource pool allocated for sidelink data transmission from a second wireless device to a first wireless device, a subset of the resource pool for the sidelink data transmission;
transmitting (<NUM>) an indication to the second wireless device of the selected subset of the resource pool wherein the indication is provided via signaling included in sidelink control information, SCI, wherein the SCI partially schedules a sidelink data channel for the data transmission from the second wireless device by indicating a subset of a set of scheduling parameters for the data transmission;
receiving SCI from the second wireless device indicating a remainder of the set of scheduling parameters that completes scheduling of the sidelink data channel; and
monitoring (<NUM>) the subset of the resource pool for the sidelink data transmission.