REQUESTING SIDELINK RESOURCES FOR SIDELINK COMMUNICATIONS OUTSIDE OF A NETWORK SERVICE REGION

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit assistance information while the UE is located in a network service region and based at least in part on a prediction that the UE will leave the network service region. The UE may receive, based at least in part on the assistance information, an allocation of a set of sidelink resources. Numerous other aspects are provided.

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for requesting sidelink resources for sidelink communications outside of a network service region.

BACKGROUND

SUMMARY

Some aspects described herein relate to a user equipment (UE) for wireless communication. The UE may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to transmit assistance information while the UE is located in a network service region and based at least in part on a prediction that the UE will leave the network service region. The one or more processors may be configured to receive, based at least in part on the assistance information, an allocation of a set of sidelink resources.

Some aspects described herein relate to a first UE for wireless communication. The first UE may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to transmit an indication of a sidelink resource preference to a second UE based at least in part on a determination that the second UE is within a network service region. The one or more processors may be configured to receive, from the second UE and based at least in part on transmitting the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources.

Some aspects described herein relate to a first UE for wireless communication. The first UE may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to receive an indication of a sidelink resource preference from a second UE. The one or more processors may be configured to transmit, to the second UE and based at least in part on receiving the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources.

Some aspects described herein relate to a method of wireless communication performed by a UE. The method may include transmitting assistance information while the UE is located in a network service region and based at least in part on a prediction that the UE will leave the network service region. The method may include receiving, based at least in part on the assistance information, an allocation of a set of sidelink resources.

Some aspects described herein relate to a method of wireless communication performed by a first UE. The method may include transmitting an indication of a sidelink resource preference to a second UE based at least in part on a determination that the second UE is within a network service region. The method may include receiving, from the second UE and based at least in part on transmitting the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources.

Some aspects described herein relate to a method of wireless communication performed by a first UE. The method may include receiving an indication of a sidelink resource preference from a second UE. The method may include transmitting, to the second UE and based at least in part on receiving the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources.

Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a UE. The set of instructions, when executed by one or more processors of the UE, may cause the UE to transmit assistance information while the UE is located in a network service region and based at least in part on a prediction that the UE will leave the network service region. The set of instructions, when executed by one or more processors of the UE, may cause the UE to receive, based at least in part on the assistance information, an allocation of a set of sidelink resources.

Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a first UE. The set of instructions, when executed by one or more processors of the first UE, may cause the first UE to transmit an indication of a sidelink resource preference to a second UE based at least in part on a determination that the second UE is within a network service region. The set of instructions, when executed by one or more processors of the first UE, may cause the first UE to receive, from the second UE and based at least in part on transmitting the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources.

Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a first UE. The set of instructions, when executed by one or more processors of the first UE, may cause the first UE to receive an indication of a sidelink resource preference from a second UE. The set of instructions, when executed by one or more processors of the first UE, may cause the first UE to transmit, to the second UE and based at least in part on receiving the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources.

Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for transmitting assistance information while the apparatus is located in a network service region and based at least in part on a prediction that the apparatus will leave the network service region. The apparatus may include means for receiving, based at least in part on the assistance information, an allocation of a set of sidelink resources.

Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for transmitting an indication of a sidelink resource preference to a UE based at least in part on a determination that the UE is within a network service region. The apparatus may include means for receiving, from the UE and based at least in part on transmitting the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources.

Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving an indication of a sidelink resource preference from a UE. The apparatus may include means for transmitting, to the UE and based at least in part on receiving the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources.

DETAILED DESCRIPTION

As described herein, a network node, which may be referred to as a “node,” a “network node,” or a “wireless node,” may be a base station (e.g., base station110), a UE (e.g., UE120), a relay device, a network controller, an apparatus, a device, a computing system, one or more components of any of these, and/or another processing entity configured to perform one or more aspects of the techniques described herein. For example, a network node may be a UE. As another example, a network node may be a base station. A network node may be an aggregated base station and/or one or more components of a disaggregated base station. As an example, a first network node may be configured to communicate with a second network node or a third network node. The adjectives “first,” “second,” “third,” and so on are used for contextual distinction between two or more of the modified noun in connection with a discussion and are not meant to be absolute modifiers that apply only to a certain respective node throughout the entire document. For example, a network node may be referred to as a “first network node” in connection with one discussion and may be referred to as a “second network node” in connection with another discussion, or vice versa. Reference to a UE, base station, apparatus, device, computing system, or the like may include disclosure of the UE, base station, apparatus, device, computing system, or the like being a network node. For example, disclosure that a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node. Consistent with this disclosure, once a specific example is broadened in accordance with this disclosure (e.g., a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node), the broader example of the narrower example may be interpreted in the reverse, but in a broad open-ended way. In the example above where a UE being configured to receive information from a base station also discloses a first network node being configured to receive information from a second network node, “first network node” may refer to a first UE, a first base station, a first apparatus, a first device, a first computing system, a first one or more components, a first processing entity, or the like configured to receive the information from the second network; and “second network node” may refer to a second UE, a second base station, a second apparatus, a second device, a second computing system, a second one or more components, a second processing entity, or the like.

In some aspects, a UE (e.g., the UE120) may include a communication manager140. In some aspects, the communication manager140may include one or more processors and/or processor-readable code stored in memory that, when executed by the one or more processors, causes the UE to perform one or more operations, as described herein. For example, as described in more detail elsewhere herein, the communication manager140may transmit assistance information while the UE is located in a network service region and based at least in part on a prediction that the UE will leave the network service region; and receive, based at least in part on the assistance information, an allocation of a set of sidelink resources. As described in more detail elsewhere herein, the communication manager140may transmit an indication of a sidelink resource preference to a second UE based at least in part on a determination that the second UE is within a network service region; and receive, from the second UE and based at least in part on transmitting the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources. As described in more detail elsewhere herein, the communication manager140may receive an indication of a sidelink resource preference from a second UE; and transmit, to the second UE and based at least in part on receiving the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources. Additionally, or alternatively, the communication manager140may perform one or more other operations described herein.

In some aspects, a UE (e.g., the UE120) includes means for transmitting assistance information while the UE is located in a network service region and based at least in part on a prediction that the UE will leave the network service region; and/or means for receiving, based at least in part on the assistance information, an allocation of a set of sidelink resources. In some aspects, a first UE includes means for transmitting an indication of a sidelink resource preference to a second UE based at least in part on a determination that the second UE is within a network service region; and/or means for receiving, from the second UE and based at least in part on transmitting the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources. In some aspects, the first UE includes means for receiving an indication of a sidelink resource preference from a second UE; and/or means for transmitting, to the second UE and based at least in part on receiving the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources. The means for the UE and/or the first UE to perform operations described herein may include, for example, one or more of communication manager140, antenna252, modem254, MIMO detector256, receive processor258, transmit processor264, TX MIMO processor266, controller/processor280, or memory282.

FIG.3is a diagram illustrating an example300of sidelink communications, in accordance with the present disclosure.

As shown inFIG.3, a first UE305-1may communicate with a second UE305-2(and one or more other UEs305) via one or more sidelink channels310. The UEs305-1and305-2may communicate using the one or more sidelink channels310for P2P communications, D2D communications, V2X communications (e.g., which may include V2V communications, V2I communications, and/or V2P communications) and/or mesh networking. In some aspects, the UEs305(e.g., UE305-1and/or UE305-2) may correspond to one or more other UEs described elsewhere herein, such as UE120. In some aspects, the one or more sidelink channels310may use a PC5 interface and/or may operate in a high frequency band (e.g., the 5.9 GHz band). Additionally, or alternatively, the UEs305may synchronize timing of transmission time intervals (TTIs) (e.g., frames, subframes, slots, or symbols) using global navigation satellite system (GNSS) timing.

As further shown inFIG.3, the one or more sidelink channels310may include a physical sidelink control channel (PSCCH)315, a physical sidelink shared channel (PSSCH)320, and/or a physical sidelink feedback channel (PSFCH)325. The PSCCH315may be used to communicate control information, similar to a physical downlink control channel (PDCCH) and/or a physical uplink control channel (PUCCH) used for cellular communications with a base station110via an access link or an access channel. The PSSCH320may be used to communicate data, similar to a physical downlink shared channel (PDSCH) and/or a physical uplink shared channel (PUSCH) used for cellular communications with a base station110via an access link or an access channel. For example, the PSCCH315may carry sidelink control information (SCI)330, which may indicate various control information used for sidelink communications, such as one or more resources (e.g., time resources, frequency resources, and/or spatial resources) where a transport block (TB)335may be carried on the PSSCH320. The TB335may include data. The PSFCH325may be used to communicate sidelink feedback340, such as hybrid automatic repeat request (HARD) feedback (e.g., acknowledgement or negative acknowledgement (ACK/NACK) information), transmit power control (TPC), and/or a scheduling request (SR).

Although shown on the PSCCH315, in some aspects, the SCI330may include multiple communications in different stages, such as a first stage SCI (SCI-1) and a second stage SCI (SCI-2). The SCI-1 may be transmitted on the PSCCH315. The SCI-2 may be transmitted on the PSSCH320. The SCI-1 may include, for example, an indication of one or more resources (e.g., time resources, frequency resources, and/or spatial resources) on the PSSCH320, information for decoding sidelink communications on the PSSCH, a quality of service (QoS) priority value, a resource reservation period, a PSSCH demodulation reference signal (DMRS) pattern, an SCI format for the SCI-2, a beta offset for the SCI-2, a quantity of PSSCH DMRS ports, and/or a modulation and coding scheme (MCS). The SCI-2 may include information associated with data transmissions on the PSSCH320, such as a hybrid automatic repeat request (HARM) process ID, a new data indicator (NDI), a source identifier, a destination identifier, and/or a channel state information (CSI) report trigger.

In some aspects, a UE305may operate using a sidelink transmission mode (e.g., Mode 1) where resource selection and/or scheduling is performed by a base station110. For example, the UE305may receive a grant (e.g., in downlink control information (DCI) or in a radio resource control (RRC) message, such as for configured grants) from the base station110for sidelink channel access and/or scheduling. In some aspects, a UE305may operate using a transmission mode (e.g., Mode 2). A Mode 2 resource selection operation is an operation in which resource selection and/or scheduling is performed by the UE305(e.g., rather than a base station110). In some aspects, the UE305may perform Mode 2 resource selection and/or scheduling by sensing channel availability for transmissions. For example, the UE305may measure a received signal strength indicator (RSSI) parameter (e.g., a sidelink-RSSI (S-RSSI) parameter) associated with various sidelink channels, may measure a reference signal received power (RSRP) parameter (e.g., a PSSCH-RSRP parameter) associated with various sidelink channels, and/or may measure a reference signal received quality (RSRQ) parameter (e.g., a PSSCH-RSRQ parameter) associated with various sidelink channels, and may select a channel for transmission of a sidelink communication based at least in part on the measurement(s).

Additionally, or alternatively, the UE305may perform resource selection and/or scheduling using SCI330received in the PSCCH315, which may indicate occupied resources and/or channel parameters. Additionally, or alternatively, the UE305may perform resource selection and/or scheduling by determining a channel busy ratio (CBR) associated with various sidelink channels, which may be used for rate control (e.g., by indicating a maximum number of resource blocks that the UE305can use for a particular set of subframes).

In the transmission mode where resource selection and/or scheduling is performed by a UE305, the UE305may generate sidelink grants, and may transmit the grants in SCI330. A sidelink grant may indicate, for example, one or more parameters (e.g., transmission parameters) to be used for an upcoming sidelink transmission, such as one or more resource blocks to be used for the upcoming sidelink transmission on the PSSCH320(e.g., for TBs335), one or more subframes to be used for the upcoming sidelink transmission, and/or a modulation and coding scheme (MCS) to be used for the upcoming sidelink transmission. In some aspects, a UE305may generate a sidelink grant that indicates one or more parameters for semi-persistent scheduling (SPS), such as a periodicity of a sidelink transmission. Additionally, or alternatively, the UE305may generate a sidelink grant for event-driven scheduling, such as for an on-demand sidelink message.

FIG.4is a diagram illustrating an example400of sidelink communications and access link communications, in accordance with the present disclosure.

As shown inFIG.4, a transmitter (Tx)/receiver (Rx) UE405and an Rx/Tx UE410may communicate with one another via a sidelink, as described above in connection withFIG.3. As further shown, in some sidelink modes, a network node415may communicate with the Tx/Rx UE405via a first access link. Additionally, or alternatively, in some sidelink modes, the network node415may communicate with the Rx/Tx UE410via a second access link. The Tx/Rx UE405and/or the Rx/Tx UE410may correspond to one or more UEs described elsewhere herein, such as the UE305-1and305-2ofFIG.3. A direct link between UEs405and410(e.g., via a PC5 interface) may be referred to as a sidelink, and a direct link between a network node415and a UE405and/or410(e.g., via a Uu interface) may be referred to as an access link. Sidelink communications may be transmitted via the sidelink, and access link communications may be transmitted via the access link. An access link communication may be a downlink communication (from a network node415to a UE405and/or410) and/or an uplink communication (from a UE405and/or410to a network node415).

In some cases, the network node415may utilize configured grants (CGs) for scheduling and/or allocating resources for sidelink communications. For example, a transmitting UE (e.g., the Tx/Rx UE405) can request a set of resources. If a grant can be obtained from the network node415, then the requested resources are reserved in a periodic manner. The network node415can configure the Tx/Rx UE405with periodic CG occasions (e.g., sidelink transmission opportunities). Each CG occasion can be associated with the resources granted by the network node415(e.g., specifying specific periodic slots in the time domain and/or specific sub-channels in the frequency domain for sidelink communications). The Tx/Rx UE405can transmit a PSCCH and/or a PSSCH in an upcoming CG occasion. In some cases, the Tx/Rx UE405can report a CG sidelink transmission to the network node415to request a dynamic grant for retransmissions.

Sidelink CGs for Mode 1 channel access (e.g., where a network node, a hub UE, and/or the like, grants the CGs to UEs for sidelink communications) can allocate specific resources associated with the CGs. In some cases, the Tx/Rx UE405can be configured with a CG that indicates a set of time-frequency resources for the Tx/Rx UE405to use for sidelink transmissions. The set of time-frequency resources can be per CG occasion. The CG occasions can be configured periodically (e.g., CG occasions can be configured to occur according to a periodic schedule). The Tx/Rx UE405can receive both time domain resources and frequency domain resources associated with the sidelink CG using radio resource control (RRC) signaling.

In some cases, the network node415can allocate CGs for Mode 2 channel access. The Tx/Rx UE405can select resources from the allocated CG resources for use in transmitting a sidelink communication. For example, the Tx/Rx UE405can establish a direct PC5 sidelink connection with the Rx/Tx UE410. To transmit data on the PC5 link (e.g., via broadcast, multicast or unicast) in such a way as to minimize collisions, the Tx/Rx UE405can request resources from the network node415such as, for example, by transmitting assistance information to the network node415.

In some cases, for example, the assistance information can indicate a periodicity of TBs, a TB maximum size, and/or quality of service (QoS) information, among other examples. The network node415can configure the resources as a CG based on the request. In some cases, the network node415can configure a first type of CG (referred to as a “CG type 1”) and/or a second type of CG (referred to as a “CG type 2”). CG type 1 is a type of CG in which the allocated resources can be utilized by the requesting UE immediately and until the CG is released by the network node415. CG type 2 is a type of CG in which the allocated resources can be used by the requesting UE only after the CG is activated by the network node415(e.g., via an activation message transmitted from the network node415to the requesting UE) and only until the CG is deactivated by the network node415(e.g., via a deactivation message transmitted from the network node415to the requesting UE).

In some cases, however, as shown inFIG.4, the Tx/Rx UE405can move out of a network service region420associated with the network node415. The network service region420is a geographical region within which the Tx/Rx UE405can receive service from the network node415. A Tx/Rx UE405can receive service from the network node415if the network node415can transmit communications to the Tx/Rx UE405and/or receive communications from the Tx/Rx UE405. Therefore, when the Tx/Rx UE405is located outside of the network service region420, the Tx/Rx UE405can be unable to request and/or receive CGs from the network node415for sidelink communications. As a result, allowing UEs to move into and out of network service regions as the UEs and/or the network nodes providing the network services move can cause disruptions in sidelink communications, thereby having a negative impact on network performance.

Some aspects of the techniques and apparatuses described herein may provide for requesting sidelink resources for sidelink communications outside of a network service region. For example, in some aspects, a UE may determine a prediction that the UE will leave a network service region. The UE may transmit assistance information to a network node based at least in part on the prediction and may receive an allocation of a set of sidelink resources before the UE leaves the network service region. In this way, the UE can obtain sidelink resources to use for sidelink communications while the UE is outside of the network service region, thereby reducing sidelink communication disruptions and having a positive impact on network performance.

In some aspects, a first UE may determine that the first UE is already located outside of a network service region. In some aspects, the first UE may determine that a second UE is within the network service region and may establish a unicast connection with the second UE. For instance, the first UE may determine that the second UE is within a network service region based at least in part on a value of in-coverage field of a sidelink-synchronization signal block (S-SSB) transmitted by the second UE. The first UE may transmit an indication of a sidelink resource preference to the second UE, which may transmit assistance information, based on the resource preference, to the network node. The network node can transmit an allocation of resources to the second UE, which may transmit an indication of the resources to the first UE. In this way, the UE can obtain sidelink resources to use for sidelink communications while the UE is outside of the network service region, thereby reducing sidelink communication disruptions and having a positive impact on network performance.

FIG.5is a diagram illustrating an example500associated with requesting sidelink resources for sidelink communications outside of a network service region, in accordance with the present disclosure. As shown inFIG.5, a UE502, a UE504, and a network node506may communicate with one another. The UE502and the UE504may communicate with one another via a sidelink network. The UE502and/or the UE504may communicate with the network node506via an access link. In some aspects, the UE502and/or the UE504may be, be similar to, include, or be included in the UE120depicted inFIG.2. In some aspects, the network node506may be, be similar to, include, or be included in the base station110depicted inFIGS.1and2.

As shown by reference number508, the UE502may determine a prediction that the UE502will leave a network service region. In some aspects, the UE502may determine the prediction that the UE502will leave the network service region based at least in part on a determination that the UE502is located near a cell edge, an environmental metric based at least in part on a radar device, historical information associated with movement of the UE502, location information associated with a global navigation satellite system, and/or location information associated with a map, among other examples.

For example, in some aspects, the UE502may determine, based on location services available from the network node506and/or measurements corresponding to signals received from the network node506, that the UE502is located near a cell edge. The cell may correspond to the network service region. In some aspects, the UE502may determine that the UE502is moving closer to the cell edge, and thus may determine a prediction that the UE502will move outside of the cell (e.g., the network service region) within a predicted amount of time. In some aspects, the UE502may request sidelink resources based at least in part on the predicted amount of time satisfying a threshold.

In some aspects, the UE502may determine a prediction that the UE502will leave a network service region using a radio detection and ranging (referred to as “radar”) device and/or a light detection and ranging (LIDAR) device, or other similar device for determining ranges and/or proximity to objects, among other examples. In some aspects, for example, the UE502may determine an environmental metric based at least in part on the radar (or other range or object detection) device. The environmental metric may be, for example, a distance between the UE502and an object such as a wall. In some aspects, for example, the UE502may determine, based at least in part on the environmental metric, that the UE502is moving toward an indoor environment. In some aspects, the UE502may determine a prediction that the environmental metric will satisfy an environmental metric criterion within a predicted amount of time. In some aspects, the UE502may request sidelink resources based at least in part on the predicted amount of time satisfying a threshold.

In some aspects, as indicated above, the UE502may determine the prediction based at least in part on historical information associated with movement of the UE502, location information associated with a global navigation satellite system, and/or location information associated with a map. For example, in some aspects, the UE502may use a global navigation satellite system to determine a position and/or velocity of the UE502. The velocity of the UE502may include speed and information associated with the direction in which the UE502is moving and/or the direction in which the network service region is moving relative to the UE502. The UE502may use the position and/or velocity information to determine a prediction that the UE502will be moving outside of the network service area. In some aspects, the UE502may determine, based at least in part on a map, a prediction that the UE502will move to a region represented in the map that corresponds to a region outside of the network service region. In some aspects, the UE502may store historical location information, historical velocity information, historical map information, historical network service connection information, and/or any other historical information about the movements of the UE502. Based at least in part on the historical information, the UE502may determine a prediction that the UE502is moving toward a region that, historically, has been associated with a region outside of a network service area. In some aspects, for example, the UE502may determine patterns of motion associated with the UE502and associated patterns of network service loss.

As shown by reference number510, the UE502may transmit, and the network node506may receive, assistance information. The assistance information may be a request for sidelink resources. In some aspects, the assistance information may include, for example, an indication of preferred sidelink resources. The UE502may transmit the assistance information while the UE502is located in a network service region and based at least in part on the prediction that the UE502will leave the network service region. As shown by reference number512, the network node506may transmit, and the UE502may receive, based at least in part on the assistance information, an allocation of a set of sidelink resources. The allocation may include at least one of a Type 1 configured grant or a Type 2 configured grant.

As shown by reference number514, the UE502may detect a collision associated with the set of sidelink resources. In some aspects, the detection of the collision may be based at least in part on a detection that an amount of energy associated with the set of sidelink resources satisfies an energy threshold. In some aspects, the detection of the collision is based at least in part on a detection that a block error rate (BLER) associated with the set of sidelink resources satisfies a BLER threshold. In some aspects, the UE502may monitor for collisions associated with the set of sidelink resources continuously, continually, and/or periodically. For example, the UE502may compare energy associated with sidelink resources even after a communication with the UE504is established. In some aspects, the UE502may monitor for collisions until the UE502moves into a network service region and/or until a collision is detected.

As shown by reference number516, the UE502may determine, using an autonomous resource selection operation (e.g., the Mode 2 selection operation described above in connection withFIG.3), an additional set of sidelink resources based at least in part on the detection of the collision associated with the set of sidelink resources. As shown by reference number518, the UE502may communicate with the UE504based at least in part on the set of sidelink resources and/or the additional set of sidelink resources.

FIG.6is a diagram illustrating an example600associated with requesting sidelink resources for sidelink communications outside of a network service region, in accordance with the present disclosure. As shown inFIG.6, a UE602, a UE604, and a network node606may communicate with one another. The UE602and the UE604may communicate with one another via a sidelink network. The UE602and/or the UE604may communicate with the network node606via an access link. In some aspects, the UE602and/or the UE604may be, be similar to, include, or be included in the UE502and/or the UE502depicted inFIG.5. In some aspects, the network node606may be, be similar to, include, or be included in the network node506depicted inFIG.5.

As shown by reference number610, the UE602may determine that the UE604is within a network service region (e.g., associated with the network node606). As shown by reference number612, the UE602and the UE604may establish a unicast communication connection with one another. As shown by reference number614, the UE602may transmit, and the UE604may receive, an indication of a sidelink resource preference. The indication of the sidelink preference may include a request for sidelink resources and may be based at least in part on the determination that the UE604is within the network service region. In some aspects, the UE602may establish the unicast connection and transmit the indication of the sidelink preference based at least in part on the UE602being located outside of a network service region, based at least in part on the UE602determining that the UE602has not been allocated enough resources from a network node (e.g., the network node606) to facilitate a scheduled, or potentially-scheduled, task, and/or based at least in part on the UE602using a relay device to communicate with another UE and/or the network node606, among other examples.

As shown by reference number616, the UE604may transmit, and the network node606may receive assistance information indicating the sidelink resource preference. As shown by reference number618, the network node606may transmit, and the UE604may receive, an allocation of a set of sidelink resources. As shown by reference number620, the UE604may transmit, and the UE602may receive, an indication of the allocation of the set of sidelink resources. The UE604may transmit the indication of the allocation of the set of sidelink resources based at least in part on receiving the indication of the sidelink resource preference.

In some aspects, if the UE602determines that the unicast connection with the UE604is lost prior to receiving the indication of the set of sidelink resources and/or an indication of an activation message associated with the set of sidelink resources, the UE602may revert to an autonomous resource selection operation (e.g., the Mode 2 resource selection operation described above in connection withFIG.3).

As shown by reference number622, the network node606may transmit, and the UE604may receive, at least one of an activation message associated with the set of sidelink resources or a deactivation message associated with the set of sidelink resources. As shown by reference number624, the UE604may transmit, and the UE602may receive, at least one of an indication of the activation message or an indication of the deactivation message.

As shown by reference number626, the UE602may detect a collision associated with the set of sidelink resources. For example, the UE602may perform a collision detection operation associated with the set of sidelink resources. In some aspects, the UE602may perform the collision detection operation based at least in part on a determination of a failure of a unicast communication connection with the UE604. In some aspects, the detection of the collision is based at least in part on a detection of an amount of energy associated with the set of sidelink resources that satisfies an energy threshold. In some aspects, the detection of the collision is based at least in part on a detection of a BLER associated with the set of sidelink resources that satisfies a BLER threshold.

As shown by reference number628, the UE602may determine, using an autonomous resource selection operation, an additional set of sidelink resources based at least in part on detection of a collision associated with the set of sidelink resources. As described above, the UE602may monitor for collisions continuously and/or continually (e.g., until the UE602moves into a network service region and/or until a collision is detected). As shown by reference number630, the UE602may communicate with at least one of the UE604or an additional UE608based at least in part on the set of sidelink resources and/or the additional set of sidelink resources.

FIG.7is a diagram illustrating an example process700performed, for example, by a UE, in accordance with the present disclosure. Example process700is an example where the UE (e.g., UE502) performs operations associated with requesting sidelink resources for sidelink communications outside of a network service region.

As shown inFIG.7, in some aspects, process700may include transmitting assistance information while the UE is located in a network service region and based at least in part on a prediction that the UE will leave the network service region (block710). For example, the UE (e.g., using communication manager1008and/or transmission component1004, depicted inFIG.10) may transmit assistance information while the UE is located in a network service region and based at least in part on a prediction that the UE will leave the network service region, as described above.

As further shown inFIG.7, in some aspects, process700may include receiving, based at least in part on the assistance information, an allocation of a set of sidelink resources (block720). For example, the UE (e.g., using communication manager1008and/or reception component1002, depicted inFIG.10) may receive, based at least in part on the assistance information, an allocation of a set of sidelink resources, as described above.

In a first aspect, process700includes communicating with an additional UE based at least in part on the set of sidelink resources. In a second aspect, alone or in combination with the first aspect, the prediction that the UE will leave the network service region is based at least in part on at least one of a determination that the UE is located near a cell edge, an environmental metric based at least in part on a radar device, historical information associated with movement of the UE, location information associated with a global navigation satellite system, or location information associated with a map. In a third aspect, alone or in combination with one or more of the first and second aspects, the allocation comprises at least one of a Type 1 configured grant or a Type 2 configured grant.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, process700includes determining, using an autonomous resource selection operation, an additional set of sidelink resources based at least in part on a detection of a collision associated with the set of sidelink resources. In a fifth aspect, alone or in combination with the fourth aspect, the detection of the collision is based at least in part on a detection that an amount of energy associated with the set of sidelink resources satisfies an energy threshold. In a sixth aspect, alone or in combination with one or more of the fourth or fifth aspects, the detection of the collision is based at least in part on a detection that a BLER associated with the set of sidelink resources satisfies a BLER threshold.

FIG.8is a diagram illustrating an example process800performed, for example, by a first UE, in accordance with the present disclosure. Example process800is an example where the first UE (e.g., UE602) performs operations associated with requesting sidelink resources for sidelink communications outside of a network service region.

As shown inFIG.8, in some aspects, process800may include transmitting an indication of a sidelink resource preference to a second UE based at least in part on a determination that the second UE is within a network service region (block810). For example, the first UE (e.g., using communication manager1008and/or transmission component1004, depicted inFIG.10) may transmit an indication of a sidelink resource preference to a second UE based at least in part on a determination that the second UE is within a network service region, as described above.

As further shown inFIG.8, in some aspects, process800may include receiving, from the second UE and based at least in part on transmitting the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources (block820). For example, the first UE (e.g., using communication manager1008and/or reception component1002, depicted inFIG.10) may receive, from the second UE and based at least in part on transmitting the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources, as described above.

In a first aspect, process800includes establishing a unicast communication connection with the second UE. In a second aspect, alone or in combination with the first aspect, process800includes receiving, from the second UE, at least one of an activation indication associated with the set of sidelink resources or a deactivation indication associated with the set of sidelink resources. In a third aspect, alone or in combination with one or more of the first and second aspects, process800includes performing a collision detection operation associated with the set of sidelink resources based at least in part on a determination of a failure of a unicast communication connection with the second UE.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, process800includes determining, using an autonomous resource selection operation, an additional set of sidelink resources based at least in part on detection of a collision associated with the set of sidelink resources. In a fifth aspect, alone or in combination with the fourth aspect, the detection of the collision is based at least in part on a detection of an amount of energy associated with the set of sidelink resources that satisfies an energy threshold. In a sixth aspect, alone or in combination with one or more of the fourth or fifth aspects, the detection of the collision is based at least in part on a detection of a BLER associated with the set of sidelink resources that satisfies a BLER threshold. In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, process800includes communicating with at least one of the second UE or a third UE based at least in part on the set of sidelink resources.

FIG.9is a diagram illustrating an example process900performed, for example, by a first UE, in accordance with the present disclosure. Example process900is an example where the first UE (e.g., UE604) performs operations associated with requesting sidelink resources for sidelink communications outside of a network service region.

As shown inFIG.9, in some aspects, process900may include receiving an indication of a sidelink resource preference from a second UE (block910). For example, the first UE (e.g., using communication manager1008and/or reception component1002, depicted inFIG.10) may receive an indication of a sidelink resource preference from a second UE, as described above.

As further shown inFIG.9, in some aspects, process900may include transmitting, to the second UE and based at least in part on receiving the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources (block920). For example, the first UE (e.g., using communication manager1008and/or transmission component1004, depicted inFIG.10) may transmit, to the second UE and based at least in part on receiving the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources, as described above.

In a first aspect, process900includes transmitting, to a network node, assistance information indicating the sidelink resource preference, and receiving, from the network node, the allocation of the set of sidelink resources. In a second aspect, alone or in combination with the first aspect, process900includes establishing a unicast communication connection with the second UE. In a third aspect, alone or in combination with one or more of the first and second aspects, process900includes receiving, from a network node, at least one of an activation message associated with the set of sidelink resources or a deactivation message associated with the set of sidelink resources, and transmitting, to the second UE, at least one of an indication of the activation message or an indication of the deactivation message.

FIG.10is a diagram of an example apparatus1000for wireless communication. The apparatus1000may be a UE, or a UE may include the apparatus1000. In some aspects, the apparatus1000includes a reception component1002and a transmission component1004, which may be in communication with one another (for example, via one or more buses and/or one or more other components). As shown, the apparatus1000may communicate with another apparatus1006(such as a UE, a network node, or another wireless communication device) using the reception component1002and the transmission component1004. As further shown, the apparatus1000may include the communication manager1008. The communication manager1008may include one or more of a determination component1010or a collision detection component1012, among other examples.

The transmission component1004may transmit assistance information while the UE is located in a network service region and based at least in part on a prediction that the UE will leave the network service region. In some aspects, the determination component1010may determine the prediction that the UE will leave the network service region. In some aspects, the determination component1010may include one or more antennas, a modem, a transmit processor, a controller/processor, a memory, a radar device1014, or a combination thereof, of the UE described in connection withFIG.2. In some aspects, the determination component1010may include the reception component1002and/or the transmission component1004.

The reception component1002may receive, based at least in part on the assistance information, an allocation of a set of sidelink resources. The communication manager1008, the reception component1002, and/or the transmission component1004may communicate with an additional UE based at least in part on the set of sidelink resources. In some aspects, the communication manager1008may include one or more antennas, a modem, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described in connection withFIG.2. In some aspects, the communication manager1008may be, be similar to, include, or be included in, the communication manager140, depicted inFIGS.1and2. In some aspects, the communication manager1008may include the reception component1002and/or the transmission component1004.

The determination component1010may determine, using an autonomous resource selection operation, an additional set of sidelink resources based at least in part on a detection of a collision associated with the set of sidelink resources. The transmission component1004may transmit an indication of a sidelink resource preference to a second UE based at least in part on a determination that the second UE is within a network service region. The reception component1002may receive, from the second UE and based at least in part on transmitting the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources.

The communication manager1008, the reception component1002, and/or the transmission component1004may establish a unicast communication connection with the second UE. The reception component1002may receive, from the second UE, at least one of an activation indication associated with the set of sidelink resources or a deactivation indication associated with the set of sidelink resources. The collision detection component1012may perform a collision detection operation associated with the set of sidelink resources based at least in part on a determination of a failure of a unicast communication connection with the second UE. In some aspects, the collision detection component1012may include one or more antennas, a modem, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described in connection withFIG.2. In some aspects, the collision detection component1012may include the reception component1002and/or the transmission component1004.

The determination component1010may determine, using an autonomous resource selection operation, an additional set of sidelink resources based at least in part on detection of a collision associated with the set of sidelink resources. The communication manager1008, the reception component1002, and/or the transmission component1004may communicate with at least one of the second UE or a third UE based at least in part on the set of sidelink resources.

The reception component1002may receive an indication of a sidelink resource preference from a second UE. The transmission component1004may transmit, to the second UE and based at least in part on receiving the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources.

The transmission component1004may transmit, to a network node, assistance information indicating the sidelink resource preference. The reception component1002may receive, from the network node, the allocation of the set of sidelink resources. The communication manager1008, the reception component1002, and/or the transmission component1004may establish a unicast communication connection with the second UE. The reception component1002may receive, from a network node, at least one of an activation message associated with the set of sidelink resources or a deactivation message associated with the set of sidelink resources. The transmission component1004may transmit, to the second UE, at least one of an indication of the activation message or an indication of the deactivation message.

Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: transmitting assistance information while the UE is located in a network service region and based at least in part on a prediction that the UE will leave the network service region; and receiving, based at least in part on the assistance information, an allocation of a set of sidelink resources.

Aspect 2: The method of Aspect 1, further comprising communicating with an additional UE based at least in part on the set of sidelink resources.

Aspect 3: The method of either of Aspects 1 or 2, wherein the prediction that the UE will leave the network service region is based at least in part on at least one of: a determination that the UE is located near a cell edge, an environmental metric based at least in part on a radar device, historical information associated with movement of the UE, location information associated with a global navigation satellite system, or location information associated with a map.

Aspect 4: The method of any of Aspects 1-3, wherein the allocation comprises at least one of a Type 1 configured grant or a Type 2 configured grant.

Aspect 5: The method of any of Aspects 1-4, further comprising determining, using an autonomous resource selection operation, an additional set of sidelink resources based at least in part on a detection of a collision associated with the set of sidelink resources.

Aspect 6: The method of Aspect 5, wherein the detection of the collision is based at least in part on a detection that an amount of energy associated with the set of sidelink resources satisfies an energy threshold.

Aspect 7: The method of either of Aspects 5 or 6, wherein the detection of the collision is based at least in part on a detection that a block error rate (BLER) associated with the set of sidelink resources satisfies a BLER threshold.

Aspect 8: A method of wireless communication performed by a first user equipment (UE), comprising: transmitting an indication of a sidelink resource preference to a second UE based at least in part on a determination that the second UE is within a network service region; and receiving, from the second UE and based at least in part on transmitting the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources.

Aspect 9: The method of Aspect 8, further comprising establishing a unicast communication connection with the second UE.

Aspect 10: The method of either of Aspects 8 or 9, further comprising receiving, from the second UE, at least one of an activation indication associated with the set of sidelink resources or a deactivation indication associated with the set of sidelink resources.

Aspect 11: The method of any of Aspects 8-10, further comprising performing a collision detection operation associated with the set of sidelink resources based at least in part on a determination of a failure of a unicast communication connection with the second UE.

Aspect 12: The method of any of Aspects 8-11, further comprising determining, using an autonomous resource selection operation, an additional set of sidelink resources based at least in part on detection of a collision associated with the set of sidelink resources.

Aspect 13: The method of Aspect 12, wherein the detection of the collision is based at least in part on a detection of an amount of energy associated with the set of sidelink resources that satisfies an energy threshold.

Aspect 14: The method of either of Aspects 12 or 13, wherein the detection of the collision is based at least in part on a detection of a block error ratio (BLER) associated with the set of sidelink resources that satisfies a BLER threshold.

Aspect 15: The method of any of Aspects 8-14, further comprising communicating with at least one of the second UE or a third UE based at least in part on the set of sidelink resources.

Aspect 16: A method of wireless communication performed by a first user equipment (UE), comprising: receiving an indication of a sidelink resource preference from a second UE; and transmitting, to the second UE and based at least in part on receiving the indication of the sidelink resource preference, an indication of an allocation of a set of sidelink resources.

Aspect 17: The method of Aspect 16, further comprising: transmitting, to a network node, assistance information indicating the sidelink resource preference; and receiving, from the network node, the allocation of the set of sidelink resources.

Aspect 18: The method of either of Aspects 16 or 17, further comprising establishing a unicast communication connection with the second UE.

Aspect 19: The method of any of Aspects 16-18, further comprising: receiving, from a network node, at least one of an activation message associated with the set of sidelink resources or a deactivation message associated with the set of sidelink resources; and transmitting, to the second UE, at least one of an indication of the activation message or an indication of the deactivation message.