Interference cancellation capability awareness for sidelink communications

Abstract

The present disclosure relates to a method for wireless communication at a user equipment. The method includes determining an interference cancellation (IC) capability of a sidelink communication, wherein the sidelink communication is to be transmitted to one or more other UEs; and reporting the determined IC capability of the sidelink communication to a base station. The method also includes receiving, from the base station, an indication of resources allocated for the sidelink communication based on the reported IC capabilities; and transmitting the sidelink communication to the one or more other UEs using the allocated resources.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. patent application No. 18 / 050,589, filed by WU et al. on October 28, 2022, entitled “INTERFERENCE CANCELATION CAPABILITY AWARENESS FOR SIDELINK COMMUNICATIONS,” which is assigned to the assignee of the present invention and is expressly incorporated herein by reference in its entirety. Technical Field

[0003] The following relates to wireless communications, and in particular to techniques for interference cancellation capability awareness for sidelink communications. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems) and fifth generation (5G) systems (which may be referred to as new radio (NR) systems). These systems may employ techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations, each of which supports wireless communications for communication devices, which may be referred to as user equipment (UE).

[0005] In some aspects, two or more UEs may communicate directly using one or more sidelink channels (e.g., without using a base station as an intermediary to communicate with each other). Sidelink communication is direct communication between two (or more) UEs without the participation of a base station in the transmission and reception of data traffic. For example, UEs may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. Sidelink communication may include one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). D2D communication may be through various wireless D2D communication systems, such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR. In this case, the UE may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as performed by the base station.

[0006] 3GPP NR Rel-16 specifies three transmission types for sidelink communications: unicast, which involves direct communication between a pair of UEs; broadcast, in which a single transmitting UE transmits a message to be received by all UEs within the radio transmission range of the transmitting UE; and groupcast (or multicast), in which the transmitting UE transmits a message to a set of receiving UEs that are group members. Two resource allocation modes are specified for the NR sidelink. In mode 1 resource allocation, the base station allocates resources for sidelink transmission to the transmitting UE. The grant of the sidelink configuration can be configured for the UE for immediate use via RRC signaling. Alternatively, the base station can use a downlink control information (DCI) message to grant the UE permission to activate or deactivate the allocated resources. In mode 2 resource allocation, the transmitting UE autonomously performs resource allocation based on a sensing process.

[0007] UEs capable of interference cancellation (IC) of received sidelink communications may be improved or become available in the future. However, realization of the gains associated with such receiver IC capabilities may not be achievable with available sidelink procedures or signaling. Summary of the invention

[0008] According to the mode 1 scheduling process, the sending UE transmits a scheduling request and a sidelink buffer status report to the base station for sidelink scheduling. The base station transmits DCI to the sending UE to allocate one or more resources for sidelink communications to be sent by the sending UE. The sending UE then sends sidelink control information (SCI) and data to one or more receiving UEs in the allocated resources according to the transmission type. The SCI sent by the sending UE may also indicate the allocated resources in future time slots as reserved.

[0009] A sidelink advanced receiver is a UE that is capable of performing interference cancellation (IC) on received sidelink communications. Such a receiving UE decodes a first transmission received in a resource, performs interference cancellation, and then decodes another transmission received in the same resource. Thus, these advanced receivers are able to decode sidelink communications transmitted in overlapping resources. This is particularly useful for broadcast and multicast sidelink communications, where all transmissions may be desired signals from the perspective of the receiving UE. Therefore, IC capabilities at the receiver can significantly improve sidelink communication reliability and increase network capacity. However, according to current signaling procedures for sidelink communications, the base station is not aware of the possible IC capabilities of the receiving UE to which the sidelink communication will be sent, and therefore the IC gain associated with the receiver IC capabilities may not be achieved.

[0010] The present application relates to implementing IC-aware sidelink scheduling such as Mode 1 scheduling and signaling processes that facilitate operation of receiving UEs, taking into account different types of situations. IC gains associated with advanced receivers can be achieved by providing the base station with awareness of the IC capabilities of the receiving UEs to which the sidelink communications will be sent. For example, in the case where the sidelink communications will be sent to one or more UEs that do not have IC capabilities, the sidelink scheduling can be done in the old-fashioned way, i.e., so that the resources allocated to the transmitting UE for the sidelink communications do not overlap with those resources allocated to another transmission. However, in the case where the sidelink communications will be sent to one or more UEs capable of performing interference cancellation, the base station can schedule the sidelink communications in resources that overlap with another transmission, thereby improving capacity.

[0011] According to one aspect, a method for wireless communication at a UE is provided. The method includes determining interference cancellation (IC) capability of a sidelink communication, wherein the sidelink communication is to be sent to one or more other UEs; reporting the determined IC capability of the sidelink communication to a base station; receiving from the base station an indication of resources allocated for the sidelink communication based on the reported IC capability; and sending the sidelink communication to the one or more other UEs using the allocated resources. This may allow the base station to perceive the IC capability of the sidelink communication so that an IC gain may be achieved.

[0012] According to one aspect, an apparatus for wireless communication at a UE is provided. The apparatus includes a component for determining interference cancellation (IC) capability of a sidelink communication, wherein the sidelink communication is to be sent to one or more other UEs; a component for reporting the determined IC capability of the sidelink communication to a base station; a component for receiving from the base station an indication of resources allocated for the sidelink communication based on the reported IC capability; and a component for sending the sidelink communication to the one or more other UEs using the allocated resources.

[0013] According to one aspect, a device for wireless communication at a UE is provided. The device includes a memory and one or more processors operably coupled to the memory, the memory and the one or more processors being configured to: determine interference cancellation (IC) capability of a sidelink communication, wherein the sidelink communication is to be sent to one or more other UEs; report the determined IC capability of the sidelink communication to a base station; receive from the base station an indication of resources allocated for the sidelink communication based on the reported IC capability; and send the sidelink communication to the one or more other UEs using the allocated resources.

[0014] According to one aspect, a non-transitory computer-readable medium storing a code for wireless communication at a UE is provided. The code includes instructions that can be executed by a processor to perform the following operations: determine interference cancellation (IC) capability of a sidelink communication, wherein the sidelink communication is to be sent to one or more other UEs; report the determined IC capability of the sidelink communication to a base station; receive from the base station an indication of resources allocated for the sidelink communication based on the reported IC capability; and send the sidelink communication to the one or more other UEs using the allocated resources.

[0015] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving an indication of IC capabilities from each of the one or more other UEs to which the sidelink communication is to be sent, wherein determining the IC capabilities of the sidelink communication comprises determining the IC capabilities of the sidelink communication based on one or more received indications. This may allow the IC capabilities to be determined for a single UE to which the sidelink communication is to be unicast or for a group of UEs to which the sidelink communication is to be multicast.

[0016] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the indication of IC capability received from each of the one or more other UEs indicates whether the UE of the one or more other UEs is capable of performing interference cancellation on the received sidelink communication.

[0017] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, determining the IC capability for the sidelink communication includes determining that IC capability is present when all of the one or more other UEs are capable of performing interference cancellation on the received sidelink communication.

[0018] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the indication of IC capability received from the UE of the one or more other UEs indicates a level of IC capability of the UE of the one or more other UEs.

[0019] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the level of IC capability is symbol level interference cancellation (SLIC) capability or codeword level IC capability.

[0020] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, determining the IC capability of the sidelink communication includes determining the level of IC capability of the sidelink communication based on the level of IC capability of each of the one or more other UEs.

[0021] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the sidelink communication is a unicast sidelink communication to be sent to one other UE; the indication of IC capability is received from the one other UE to which the unicast sidelink communication is to be sent; and the determined IC capability of the unicast sidelink communication is determined based on the indication of IC capability received from the one other UE.

[0022] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the side link communication is a multicast side link communication to be sent to multiple other UEs; the indication of IC capability is received from each of the multiple other UEs to which the multicast side link communication is to be sent; and the determined IC capability of the multicast side link communication is determined based on the indication of IC capability received from the multiple other UEs.

[0023] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the sidelink communication is a broadcast sidelink communication to be sent to a plurality of other UEs; and determining the IC capability of the sidelink communication includes determining that IC capability does not exist for the broadcast sidelink communication. For example, an indication of IC capability may not be obtained from each UE to which the broadcast sidelink communication is to be sent, and because the plurality of UEs may include legacy UEs that do not support interference cancellation, IC capability may be reported as not existing, so that the base station does not use the IC assumption to schedule the broadcast sidelink communication.

[0024] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the sidelink communication is a broadcast sidelink communication to be sent to a plurality of other UEs; and determining the IC capability of the sidelink communication includes determining the IC capability of the broadcast sidelink communication based on a sidelink application associated with the broadcast sidelink communication. For example, there may be sidelink applications that target new releases or advanced UEs that have IC capabilities by default, and therefore, for sidelink communications associated with those sidelink applications, IC capabilities may be reported as present.

[0025] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the indication of the allocated resources received from the base station includes an indication of an IC assumption for the allocated resources. For example, where the indication of the IC assumption indicates that IC is assumed by the base station in scheduling, the UE may determine that there is another overlapping transmission in the resources allocated for the sidelink communication.

[0026] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: determining a modulation coding scheme (MCS) for the sidelink communication based on the IC assumption for the allocated resources; and sending the sidelink communication to the one or more other UEs using the determined MCS. For example, if the indication of the IC assumption indicates that IC is assumed by the base station in scheduling, the UE may use a lower MCS index for the sidelink communication because interference may affect decoding at one or more other UEs, even when the one or more other UEs are capable of performing interference cancellation.

[0027] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: sending an indication of the IC assumption to the one or more other UEs. This allows the one or more other UEs to determine whether to perform interference cancellation based on whether overlapping transmissions are scheduled in the resources allocated to the sidelink communication. This can avoid the situation where the one or more other UEs perform interference cancellation by default even in the absence of overlapping transmissions.

[0028] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: receiving from the base station an indication of a demodulation reference signal (DMRS) index assigned to the side link communication and an indication of a DMRS index assigned to another side link communication to which overlapping resources have been allocated. The indication of the DMRS index assigned to the side link communication may be provided in a DCI message that provides the indication of resources allocated for the side link communication. The indication of the DMRS index assigned to the side link communication may be provided in a first field of the DCI message, and the indication of the DMRS index assigned to another side link communication to which overlapping resources have been allocated may be provided in a second field of the DCI message.

[0029] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: sending the indication of the DMRS index assigned to the side link communication and the indication of the DMRS index assigned to the other side link communication to which overlapping resources have been allocated to the one or more other UEs. This may allow the one or more other UEs to perform interference cancellation without blind decoding of the overlapping transmissions.

[0030] According to one aspect, a method for wireless communication at a base station is provided. The method includes receiving a report of interference cancellation (IC) capability of a sidelink communication to be sent by the UE from a UE; allocating resources for the sidelink communication based on the reported IC capability; and sending an indication of the resources allocated for the sidelink communication to the UE.

[0031] According to one aspect, an apparatus for wireless communication at a base station is provided. The apparatus includes a component for receiving a report of interference cancellation (IC) capability of a sidelink communication to be sent by the UE from a UE; a component for allocating resources for the sidelink communication based on the reported IC capability; and a component for sending an indication of the resources allocated for the sidelink communication to the UE.

[0032] According to one aspect, an apparatus for wireless communication at a base station is provided. The apparatus includes a memory and one or more processors operably coupled to the memory, the memory and the one or more processors being configured to receive a report of interference cancellation (IC) capability of a sidelink communication to be sent by the UE from a UE; allocate resources for the sidelink communication based on the reported IC capability; and send an indication of the resources allocated for the sidelink communication to the UE.

[0033] According to one aspect, a non-transitory computer-readable medium storing code for wireless communication at a base station is provided. The code includes instructions that can be executed by a processor to perform the following operations: receiving a report of interference cancellation (IC) capability of a sidelink communication to be sent by the UE from a UE; allocating resources for the sidelink communication based on the reported IC capability; and sending an indication of the resource allocated for the sidelink communication to the UE.

[0034] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the indication of the allocated resources received from the base station includes an indication of an interference cancellation hypothesis for the allocated resources.

[0035] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, allocating resources for the side link communication includes allocating resources that at least partially overlap with resources allocated to another side link communication when the reported IC capability indicates that IC capability exists for the side link communication.

[0036] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the indication of the IC assumption indicates that interference cancellation is assumed. For example, in the case where the allocated resources at least partially overlap with the resources allocated to the other side link communication, the indication of the IC assumption may indicate that interference cancellation is assumed. In the case where the allocated resources do not overlap with the resources allocated to the other side link communication, the indication of the IC assumption may indicate that interference cancellation is not assumed.

[0037] Some examples of the methods, devices, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: assigning an orthogonal demodulation reference signal (DMRS) to the side link communication and another other side link communication to which overlapping resources are allocated. In the existing NR side link, three orthogonal cover codes have been specified for the PSCCH DMRS. The transmitting UE randomly selects one for its side link communication. When two side link transmissions happen to occur in the same resource, if the transmitting UE has selected a different cover code, the two transmissions may have orthogonal PSCCH DMRS, so the receiving UE may be able to decode at least one transmission. For side link communications with IC capability, the base station may assign orthogonal DMRS for PSCCH and / or PSSCH to overlapping transmissions to facilitate IC operation at the receiving UE.

[0038] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending to the UE an indication of the assigned DMRS index for the side link communication and an indication of the DMRS index assigned to the other side link communication.

[0039] According to one aspect, a method for wireless communication at a UE is provided. The method includes sending an indication of interference cancellation (IC) capability to another UE from which a sidelink communication is to be received; and receiving the sidelink communication from the other UE using resources allocated to the other UE based at least in part on the IC capability. For example, the resources may be allocated based at least in part on the indication of the IC capability.

[0040] According to one aspect, an apparatus for wireless communication at a base station is provided. The apparatus includes a component for sending an indication of interference cancellation (IC) capability to another UE from which a sidelink communication is to be received; and a component for receiving the sidelink communication from the other UE using resources allocated to the other UE based at least in part on the IC capability. For example, the resources may be allocated based at least in part on the indication of the IC capability.

[0041] According to one aspect, an apparatus for wireless communication at a base station is provided. The apparatus includes a memory and one or more processors operably coupled to the memory, the memory and the one or more processors being configured to send an indication of interference cancellation (IC) capability to another UE from which a sidelink communication will be received; and receive the sidelink communication from the other UE using resources allocated to the other UE based at least in part on the IC capability. For example, the resources may be allocated based at least in part on the indication of the IC capability.

[0042] According to one aspect, a non-transitory computer-readable medium storing code for wireless communication at a base station is provided. The code includes instructions that can be executed by a processor to perform the following operations: sending an indication of interference cancellation (IC) capability to another UE from which a sidelink communication will be received; and receiving the sidelink communication from the other UE using resources allocated to the other UE based at least in part on the IC capability. For example, the resources can be allocated based at least in part on the indication of the IC capability.

[0043] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving, from the other UE, an indication of an IC assumption for the allocated resources.

[0044] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for selectively performing interference cancellation on the received side link communication based on the indication of the IC assumption. For example, if the IC assumption indicates that interference cancellation is assumed, interference cancellation may be performed. Alternatively or additionally, interference cancellation may be selectively performed based on the IC capability. For example, in the absence of an indication of an IC assumption for the allocated resources received from the other UE, the UE with IC capability may perform interference cancellation by default.

[0045] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving, from the other UE, an indication of a DMRS index assigned to the sidelink communication and an indication of a DMRS index assigned to another other sidelink communication to which overlapping resources have been allocated.

[0046] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for selectively performing interference cancellation on the received sidelink communication based on the indication of the DMRS index. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 An example of a wireless communication system that supports techniques for interference cancellation capability awareness for sidelink communications is illustrated.

[0048] Figure 2 An example of a wireless communication system that supports techniques for interference cancellation capability awareness for sidelink communications in accordance with aspects of the present disclosure is illustrated.

[0049] Figure 3 An example of a process flow for techniques supporting interference cancellation capability awareness for unicast and multicast sidelink communications in accordance with aspects of the present disclosure is illustrated.

[0050] Figure 4 An example of a process flow for techniques supporting interference cancellation capability awareness for broadcast sidelink communications in accordance with aspects of the present disclosure is illustrated.

[0051] Figure 5 Devices that support techniques for interference cancellation capability awareness for sidelink communications in accordance with one or more aspects of the present disclosure are illustrated.

[0052] Figure 6 Devices that support techniques for interference cancellation capability awareness for sidelink communications in accordance with one or more aspects of the present disclosure are illustrated.

[0053] Figure 7Devices that support techniques for interference cancellation capability awareness for sidelink communications in accordance with one or more aspects of the present disclosure are illustrated.

[0054] Figures 8 to 10 A flow chart illustrating a method of supporting techniques for interference cancellation capability awareness for sidelink communications in accordance with one or more aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0055] Aspects of the disclosure are first described in the context of a wireless communication system. Additional aspects of the disclosure are described in the context of an example process flow. Aspects of the disclosure are also illustrated by and described with reference to apparatus diagrams and flow charts related to techniques for interference cancellation capability awareness for sidelink communications.

[0056] Figure 1 An example of a wireless communication system 100 that supports techniques for interference cancellation capability awareness for sidelink communications according to one or more aspects of the present disclosure is illustrated. The wireless communication system 100 includes one or more network entities 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating according to other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.

[0057] The network entities 105 may be dispersed throughout a geographic area to form the wireless communication system 100, and may include devices in different forms or with different capabilities. In various examples, the network entities 105 may be referred to as network elements, mobility elements, radio access network (RAN) nodes, or network equipment, among other nomenclature. In some examples, the network entities 105 and the UE 115 may communicate wirelessly via one or more communication links 125 (e.g., radio frequency (RF) access links). For example, the network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) within which the UE 115 and the network entity 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area within which the network entity 105 and the UE 115 may support signal communications according to one or more radio access technologies (RATs).

[0058] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. The UEs 115 may be devices in different forms or with different capabilities. Figure 1Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of supporting communication with various types of devices, such as Figure 1 Communicate with other UEs 115 or network entities 105) as shown.

[0059] As described herein, a node of the wireless communication system 100 (which may be referred to as a network node or a wireless node) may be a network entity 105 (e.g., any network entity described herein), a UE 115 (e.g., any UE described herein), a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, the node may be a UE 115. As another example, the node may be a network entity 105. As another example, a first node may be configured to communicate with a second node or a third node. In one aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a UE 115. In another aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a network entity 105. In other aspects of this example, the first node, the second node, and the third node may be different relative to these examples. Similarly, references to UE 115, network entity 105, apparatus, device, computing system, etc. may include disclosure of UE 115, network entity 105, apparatus, device, computing system, etc. as nodes. For example, a disclosure that UE 115 is configured to receive information from network entity 105 also discloses that the first node is configured to receive information from a second node.

[0060] In some examples, the network entities 105 may communicate with the core network 130, or with each other, or both. For example, the network entities 105 may communicate with the core network 130 via one or more backhaul communication links 120 (e.g., according to S1, N2, N3, or other interface protocols). In some examples, the network entities 105 may communicate with each other directly (e.g., directly between the network entities 105) or indirectly (e.g., via the core network 130) via the backhaul communication links 120 (e.g., according to X2, Xn, or other interface protocols). In some examples, the network entities 105 may communicate with each other via midhaul communication links 162 (e.g., according to a midhaul interface protocol) or fronthaul communication links 168 (e.g., according to a fronthaul interface protocol) or any combination thereof. The backhaul communication links 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., electrical links, optical fiber links), one or more wireless links (e.g., radio links, wireless optical links), etc. or various combinations thereof. UE 115 may communicate with core network 130 via communication link 155 .

[0061] One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a transceiver base station, a radio base station, an NR base station, an access point, a radio transceiver, a Node B, an evolved Node B (eNB), a next generation Node B, or a Gigabit Node B (any of which may be referred to as a gNB), a 5G NB, a next generation eNB (ng-eNB), a Home Node B, a Home Evolved Node B, or other suitable terms). In some examples, the network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, stand-alone) base station architecture, which may be configured to utilize a protocol stack physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as a base station 140).

[0062] In some examples, the network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) that may be configured to utilize a protocol stack that is physically or logically distributed between two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance), or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN)). For example, the network entity 105 may include one or more of the following: a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN intelligent controller (RIC) 175 (e.g., a near real-time RIC (near RT RIC), a non-real-time RIC (non-RT RIC)), a service management and orchestration (SMO) 180 system, or any combination thereof. The RU 170 may also be referred to as a radio head, a smart radio head, a remote radio head (RRH), a remote radio unit (RRU), or a transmit receive point (TRP). One or more components of the network entity 105 in the decomposed RAN architecture may be co-located, or one or more components of the network entity 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more network entities 105 of the decomposed RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0063] The functional split between CU 160, DU 165, and RU 170 is flexible and may support different functionalities, depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combination thereof) are performed at CU 160, DU 165, or RU 170. For example, a functional split of a protocol stack may be employed between CU 160 and DU 165 such that CU 160 may support one or more layers of a protocol stack and DU 165 may support one or more different layers of a protocol stack. In some examples, CU 160 may host higher protocol layer (e.g., Layer 3 (L3), Layer 2 (L2)) functionality and signaling (e.g., Radio Resource Control (RRC), Service Data Adaptation Protocol (SDAP), Packet Data Convergence Protocol (PDCP)). The CU 160 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 may host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160. Additionally or alternatively, a functional split of the protocol stack may be employed between the DU 165 and the RU 170, such that the DU 165 may support one or more layers of the protocol stack, and the RU 170 may support one or more different layers of the protocol stack. The DU 165 may support one or more different cells (e.g., via one or more RUs 170). In some cases, the functional split between CU 160 and DU 165 or between DU 165 and RU 170 may be within a protocol layer (e.g., some functions of a protocol layer may be performed by one of CU 160, DU 165, or RU 170, while other functions of the protocol layer are performed by a different one of CU 160, DU 165, or RU 170). CU 160 may be further functionally split into CU control plane (CU-CP) and CU user plane (CU-UP) functions. CU 160 may be connected to one or more DUs 165 via midhaul communication links 162 (e.g., F1, F1-c, F1-u), and DU 165 may be connected to one or more RUs 170 via fronthaul communication links 168 (e.g., an open fronthaul (FH) interface). In some examples, midhaul communication link 162 or fronthaul communication link 168 may be implemented according to interfaces (eg, channels) between layers of a protocol stack supported by respective network entities 105 communicating via those communication links.

[0064] In some wireless communication systems (e.g., wireless communication system 100), infrastructure and spectrum resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, thereby providing an IAB network architecture (e.g., to core network 130). In some cases, in an IAB network, one or more network entities 105 (e.g., IAB nodes 104) may be partially controlled by each other. One or more IAB nodes 104 may be referred to as donor entities or IAB donors. One or more DUs 165 or one or more RUs 170 may be controlled in part by one or more CUs 160 associated with a donor network entity 105 (e.g., donor base station 140). One or more donor network entities 105 (e.g., IAB donors) may communicate with one or more additional network entities 105 (e.g., IAB nodes 104) via supported access and backhaul links (e.g., backhaul communication links 120). The IAB node 104 may include an IAB mobile terminal (IAB-MT) controlled (e.g., scheduled) by a coupled IAB donor's DU 165. The IAB-MT may include an independent set of antennas for relaying communications with the UE 115, or may share the same antennas (e.g., of the RU 170) of the IAB node 104 for access via the DU 165 of the IAB node 104 (e.g., referred to as a virtual IAB-MT (vIAB-MT)). In some examples, the IAB node 104 may include a DU 165 that supports communication links with additional entities (e.g., IAB node 104, UE 115) within a relay chain or configuration (e.g., downstream) of the access network. In such cases, one or more components of the decomposed RAN architecture (e.g., one or more IAB nodes 104 or components of the IAB node 104) may be configured to operate according to the techniques described herein.

[0065] Where the techniques described herein are applied to the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support the techniques described herein for supporting energy transfer devices for multiple types of wireless energy. For example, some operations described as being performed by a UE 115 or a network entity 105 (e.g., a base station 140) may additionally or alternatively be performed by one or more components of the disaggregated RAN architecture (e.g., an IAB node 104, a DU 165, a CU 160, a RU 170, a RIC 175, a SMO 180).

[0066] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable term, where a "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or may be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in various objects such as appliances or vehicles, meters, etc.

[0067] The UE 115 described herein may be capable of communicating with various types of devices such as other UEs 115 which may sometimes act as relays, as well as network entities 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, etc. Figure 1 shown.

[0068] The UE 115 and the network entity 105 may wirelessly communicate with each other via one or more communication links 125 (e.g., access links) using resources associated with one or more carriers. The term "carrier" may refer to a collection of RF spectrum resources having a physical layer structure defined for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion of an RF spectrum band (e.g., a bandwidth portion (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operations, user data, or other signaling. The wireless communication system 100 may support communications with the UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used for both frequency division duplex (FDD) and time division duplex (TDD) component carriers. Communication between the network entity 105 and other devices may refer to communication between these devices and any portion (e.g., entity, sub-entity) of the network entity 105. For example, the terms "send," "receive," or "communicate" when referring to the network entity 105 may refer to any portion of a network entity 105 (e.g., base station 140, CU 160, DU 165, RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities 105).

[0069] In some examples, such as in a carrier aggregation configuration, a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute RF Channel Number (EARFCN)) and may be identified based on a channel raster for discovery by UE 115. A carrier may operate in a standalone mode, in which case initial acquisition and connection may be made by UE 115 via the carrier, or a carrier may operate in a non-standalone mode, in which case a different carrier (e.g., of the same or different radio access technology) is used to anchor the connection.

[0070] The communication link 125 shown in the wireless communication system 100 may include downlink transmissions (e.g., forward link transmissions) from the network entity 105 to the UE 115, uplink transmissions (e.g., return link transmissions) from the UE 115 to the network entity 105, or both, as well as other transmission configurations. A carrier may carry either downlink communications or uplink communications (e.g., in FDD mode), or may be configured to carry both downlink communications and uplink communications (e.g., in TDD mode).

[0071] A carrier may be associated with a particular bandwidth of the RF spectrum, and in some examples, the carrier bandwidth may be referred to as a "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of a set of bandwidths of carriers for a particular radio access technology (e.g., 1.4 megahertz (MHz), 3 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz, 40 MHz, or 80 MHz). A device of the wireless communication system 100 (e.g., a network entity 105, a UE 115, or both) may have a hardware configuration that supports communications using a particular carrier bandwidth, or may be capable of being configured to support communications using one of the carrier bandwidths in the set of carrier bandwidths. In some examples, the wireless communication system 100 may include a network entity 105 or a UE 115 that supports concurrent communications using carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate using a portion (e.g., a subband, a BWP) or all of the carrier bandwidth.

[0072] The signal waveform transmitted via the carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system using MCM technology, a resource element may refer to a resource of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, in which case the symbol period and the subcarrier spacing may be inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both), so that a relatively high number of resource elements (e.g., in the transmission duration) and a relatively high order modulation scheme may correspond to a relatively high communication rate. Wireless communication resources may refer to a combination of RF spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial resources may increase the data rate or data integrity used for communication with UE 115.

[0073] One or more parameter sets for a carrier may be supported, and a parameter set may include a subcarrier spacing ( ) and cyclic prefix. A carrier may be divided into one or more BWPs with the same or different parameter sets. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communications of a UE 115 may be constrained to one or more active BWPs.

[0074] The time interval for the network entity 105 or the UE 115 may be expressed in multiples of a basic time unit, which may be, for example, a sampling period. seconds, of which can represent the supported subcarrier spacing, and The supported discrete Fourier transform (DFT) size may be indicated. Time intervals of communication resources may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0075] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, the frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into a certain number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a certain number of symbol periods (e.g., depending on the length of the cyclic prefix appended in front of each symbol period). In some wireless communication systems 100, the time slot may be further divided into a plurality of micro-time slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0076] A subframe, a time slot, a mini-time slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in a burst of a shortened TTI (sTTI)).

[0077] Physical channels may be multiplexed according to various techniques in order to communicate using a carrier. For example, physical control channels and physical data channels may be multiplexed using one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique to signal via a downlink carrier. A control region (e.g., a control resource set (CORESET)) of a physical control channel may be defined by a set of symbol periods and may extend across a system bandwidth of a carrier or a subset of that system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more of the UEs 115 may monitor or search the control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level of the control channel candidate may refer to the amount of control channel resources (e.g., control channel elements (CCEs)) associated with the coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 , and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0078] In some examples, the network entities 105 (e.g., base stations 140, RUs 170) may be mobile and thus provide communication coverage for mobile coverage areas 110. In some examples, different coverage areas 110 associated with different technologies may overlap, but the different coverage areas 110 may be supported by the same network entity 105. In some other examples, overlapping coverage areas 110 associated with different technologies may be supported by different network entities 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of network entities 105 provide coverage for various coverage areas 110 using the same or different radio access technologies.

[0079] The wireless communication system 100 may support synchronous or asynchronous operation. For synchronous operation, the network entities 105 (e.g., base stations 140) may have similar frame timing, and transmissions from different network entities 105 may be approximately aligned in time. For asynchronous operation, the network entities 105 may have different frame timing, and in some examples, transmissions from different network entities 105 may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operation.

[0080] Some UEs 115, such as MTC or IoT devices, may be low-cost or low-complexity devices and may allow automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or with a network entity 105 (e.g., base station 140) without human intervention. In some examples, M2M communication or MTC may include communication from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application that uses the information or presents the information to a person interacting with the application. Some UEs 115 may be designed to collect information or implement automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, health care monitoring, field survival monitoring, weather and geographic event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0081] Some UEs 115 may be configured to employ an operating mode that reduces power consumption, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but does not transmit and receive concurrently). In some examples, half-duplex communication may be performed with a reduced peak rate. Other power saving techniques for UEs 115 include entering a power saving deep sleep mode when not engaged in active communications, operating using limited bandwidth (e.g., according to narrowband communications), or a combination of these techniques. For example, some UEs 115 may be configured to operate using a narrowband protocol type that is associated with a defined portion or range (e.g., a subcarrier or resource block (RB) set) within a carrier, within a guard band of a carrier, or outside a carrier.

[0082] The wireless communication system 100 may be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low-latency communication (URLLC). The UE 115 may be designed to support ultra-reliable or low-latency or critical functions. Ultra-reliable communications may include private communications or group communications and may be supported by one or more services such as push-to-talk, video, or data. Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency may be used interchangeably herein.

[0083] In some examples, a UE 115 may be configured to support communication directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., according to a peer-to-peer (P2P), D2D, or sidelink protocol). In some examples, one or more UEs 115 in a group that are performing D2D communication may be within a coverage area 110 of a network entity 105 (e.g., a base station 140, a RU 170), which may support aspects of such D2D communication configured (e.g., scheduled) by the network entity 105. In some examples, one or more UEs 115 in such a group may be outside of the coverage area 110 of the network entity 105, or may otherwise be unable or not configured to receive transmissions from the network entity 105. In some examples, a group of UEs 115 communicating via D2D communication may support a one-to-many (1:M) system, in which each UE 115 transmits to each of the other UEs 115 in the group. In some examples, network entity 105 may facilitate scheduling of resources for D2D communications. In some other examples, D2D communications may be performed between UEs 115 without involving network entity 105.

[0084] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these items. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, vehicles in the V2X system can communicate with roadside infrastructure (such as roadside units) using vehicle-to-network (V2N) communication, or communicate with the network via one or more network nodes (e.g., network entity 105, base station 140, RU 170), or both.

[0085] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing access and mobility and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) for routing packets or interconnecting to an external network. The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management of UEs 115 served by network entities 105 (e.g., base stations 140) associated with the core network 130. User IP packets may be delivered through the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to the IP services 150 of one or more network operators. IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0086] The wireless communication system 100 may operate using one or more frequency bands that may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally speaking, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from about one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features (which may be referred to as clusters), but these waves may be sufficient to penetrate structures so that macro cells provide service to UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) than communications using the lower frequencies and longer wavelengths of the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0087] The wireless communication system 100 can utilize licensed and unlicensed RF spectrum bands. For example, the wireless communication system 100 can use unlicensed bands (such as the 5 GHz Industrial, Scientific, and Medical (ISM) band) to employ License Assisted Access (LAA), LTE Unlicensed (LTE-U) radio access technology, or NR technology. When operating using unlicensed RF spectrum bands, devices such as network entity 105 and UE 115 can employ carrier sensing for conflict detection and avoidance. In some examples, operations performed using unlicensed bands can be based on carrier aggregation configuration (e.g., LAA) in conjunction with component carriers operating using licensed bands. Operations performed using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among others.

[0088] The network entity 105 (e.g., base station 140, RU 170) or UE 115 may be equipped with multiple antennas that can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of the network entity 105 or UE 115 may be located in one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with the network entity 105 may be located at different geographical locations. The network entity 105 may include an antenna array having a set of antenna ports of multiple rows and columns that the network entity 105 can use to support beamforming for communications with the UE 115. Similarly, the UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support RF beamforming for signals sent via the antenna ports.

[0089] The network entity 105 or the UE 115 may use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. Such a technology may be referred to as spatial multiplexing. The multiple signals may be sent, for example, by a transmitting device via different antennas or different combinations of antennas. Similarly, the multiple signals may be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technologies include single-user MIMO (SU-MIMO), for which multiple spatial layers are sent to the same receiving device; and multi-user MIMO (MU-MIMO), for which multiple spatial layers are sent to multiple devices.

[0090] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a network entity 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals communicated via antenna elements of an antenna array so that some signals propagating in a particular direction relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals communicated via antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each of these antenna elements may be defined by a set of beamforming weights associated with a particular direction (e.g., relative to the antenna array of the transmitting device or the receiving device or relative to some other direction).

[0091] The network entity 105 or the UE 115 may use beam scanning techniques as part of a beamforming operation. For example, the network entity 105 (e.g., base station 140, RU 170) may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be sent multiple times by the network entity 105 along different directions. For example, the network entity 105 may send signals according to different sets of beamforming weights associated with different transmission directions. Transmissions along different beam directions may be used to identify (e.g., by a transmitting device (such as the network entity 105), or by a receiving device (such as the UE 115)) beam directions for later transmission or reception by the network entity 105.

[0092] Some signals, such as data signals associated with a particular receiving device, may be transmitted by a transmitting device (e.g., transmitting network entity 105, transmitting UE 115) along a single beam direction (e.g., a direction associated with a receiving device (such as receiving network entity 105 or receiving UE 115)). In some examples, a beam direction associated with transmission along a single beam direction may be determined based on signals transmitted along one or more beam directions. For example, UE 115 may receive one or more of the signals sent by network entity 105 along different directions, and may report to network entity 105 an indication of the signal received by UE 115 with the highest signal quality or other acceptable signal quality.

[0093] In some examples, transmission by a device (e.g., by network entity 105 or UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from network entity 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured set of beams across a system bandwidth or one or more subbands. Network entity 105 may send a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)), which may or may not be precoded. UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel codebook, a linear combination codebook, a port selection codebook). Although these techniques are described with reference to signals sent along one or more directions by a network entity 105 (e.g., base station 140, RU 170), UE 115 may use similar techniques to send signals multiple times along different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115), or to send signals along a single direction (e.g., to send data to a receiving device).

[0094] A receiving device (e.g., UE 115) may perform receiving operations according to multiple receiving configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from a receiving device (e.g., network entity 105). For example, the receiving device may perform reception according to multiple receiving directions by receiving via different antenna subarrays, processing received signals according to different antenna subarrays, receiving according to different receiving beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or processing received signals according to different receiving beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as "listening" according to different receiving configurations or receiving directions. In some examples, the receiving device may use a single receiving configuration to receive along a single beam direction (e.g., when receiving a data signal). A single receive configuration may be aligned along a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0095] The wireless communication system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or PDCP layer may be IP-based. The RLC layer may perform packet segmentation and reassembly to communicate via logical channels. The MAC layer may perform priority processing and multiplexing of logical channels into transport channels. The MAC layer may also implement error detection techniques, error correction techniques, or both to support retransmission to improve link efficiency. In the control plane, the RRC layer may provide the establishment, configuration, and maintenance of an RRC connection that supports a radio bearer for user plane data between the UE 115 and the network entity 105 or the core network 130. The PHY layer may map a transport channel to a physical channel.

[0096] UE 115 and network entity 105 may support retransmission of data to increase the likelihood that the data is successfully received. Hybrid automatic repeat request (HARQ) feedback is a technique for increasing the likelihood of correctly receiving data via a communication link (e.g., communication link 125, D2D communication link 135). HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve throughput at the MAC layer under poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, a device may support same-slot HARQ feedback, in which case the device may provide HARQ feedback in a specific time slot for data received via a previous symbol in the time slot. In some other examples, the device may provide HARQ feedback in a subsequent time slot or according to some other time interval.

[0097] In some implementations, the wireless communication system 100 may support a signaling process to implement IC-aware sidelink scheduling, particularly mode 1 scheduling, that takes into account different types of situations, and to facilitate receiving UE operation so that IC gains associated with advanced receivers with IC capabilities can be achieved. For example, a transmitting UE 115 of the wireless communication system 100 may determine the IC capability of a sidelink communication, where the sidelink communication is to be transmitted to one or more receiving UEs 115 of the wireless communication system 100, and may report the determined IC capability of the sidelink communication to a network entity 105 (such as a base station 140). The IC capability of the sidelink communication may be determined by the transmitting UE based on an indication received from one or more receiving UEs 115 to which the sidelink communication is to be transmitted, or may be determined by the transmitting UE based on the transmission type of the sidelink communication. The network entity 105 (or the base station 140) may allocate resources for the sidelink communication based on the reported IC capability, and send an indication of the resources allocated for the sidelink communication to the transmitting UE 115. The transmitting UE 115 may then use the allocated resources to send the sidelink communication to the one or more receiving UEs 115. Providing the base station with awareness of the IC capabilities of sidelink communications may allow IC gains associated with the IC capabilities of advanced receivers to be achieved, thereby increasing the reliability of sidelink communications and improving network capacity.

[0098] Figure 2 An example of a wireless communication system 200 that supports techniques for interference cancellation capability awareness for sidelink communications in accordance with aspects of the present disclosure is illustrated. In some examples, aspects of the wireless communication system 200 may implement or be implemented by aspects of the wireless communication system 100. Specifically, as described herein, the wireless communication system 200 may support signaling that enables wireless devices to exchange information about interference cancellation capabilities for sidelink communications.

[0099] The wireless communication system 200 includes a base station or network entity 205, a transmitting UE 210, and a receiving UE 215. In other embodiments, the wireless communication system 200 may include multiple receiving UEs 215. Figure 2 , the transmitting UE 210 and the receiving UE 215 are illustrated as vehicles. However, each of the transmitting UE and the receiving UE may be any type of user equipment, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, a personal computer, a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc.

[0100] In some aspects, the transmitting UE 210 and the receiving UE 215 may communicate directly using one or more sidelink channels (e.g., without using the base station 205 as an intermediary to communicate with each other). For example, the UEs 210, 215 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. The sidelink communication may include one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be through various wireless D2D communication systems, such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0101] Therefore, various aspects of the present disclosure relate to a signaling process that considers different types of situations to implement IC-aware sidelink scheduling (such as mode 1 scheduling) and facilitates the operation of receiving UEs so that IC gains associated with advanced receivers with IC capabilities can be achieved. For example, a transmitting UE may determine the IC capabilities of a sidelink communication, where the sidelink communication will be sent to one or more receiving UEs, and may report the determined IC capabilities of the sidelink communication to a base station. The IC capabilities of the sidelink communication may be determined by the transmitting UE based on an indication received from one or more receiving UEs to which the sidelink communication will be sent, or may be determined by the transmitting UE based on the transmission type of the sidelink communication. The base station may allocate resources for the sidelink communication based on the reported IC capabilities, and send an indication of the resources allocated for the sidelink communication to the transmitting UE. The transmitting UE may then use the allocated resources to send the sidelink communication to one or more receiving UEs. Providing the base station with awareness of the IC capabilities of the sidelink communication may allow the IC gains associated with the IC capabilities of the advanced receiver to be achieved, thereby increasing the reliability of the sidelink communication and improving network capacity.

[0102] For example, referring to wireless communication system 200, receiving UE 215, transmitting UE 210, and base station 205 may exchange IC capability information in order to utilize the IC capability of the receiving UE (if present) to increase network capacity. Figure 2 In the embodiment of the present disclosure shown in , the sidelink communication 220 is illustrated as a unicast sidelink communication between the transmitting UE 210 and the receiving UE 215. In other embodiments, the sidelink communication may be a groupcast or broadcast sidelink communication to be sent to multiple receiving UEs.

[0103] The receiving UE 215 may send an indication 225 of IC capability to the sending UE 210 from which the sidelink communication 220 is to be received. For unicast sidelink communications, the indication of IC capability may be provided in RRC signaling, e.g., where a PC5-RRC connection has been established between the sending UE 210 and the receiving UE 215. The sending UE 210 determines the IC capability of the sidelink communication 220 and sends a report 230 of the determined IC capability of the sidelink communication to the base station 205. For example, Figure 2 , when the receiving UE 215 is capable of performing interference cancellation on the received sidelink communication, the transmitting UE 210 may determine that there is IC capability for the unicast sidelink communication, as indicated by the indication 225. If the indication 225 indicates that the receiving UE 215 is not capable of performing interference cancellation, or if the indication 225 is not received by the transmitting UE 210, the transmitting UE may determine that there is no IC capability for the sidelink communication 220.

[0104] The base station 205 receives the report 230 of the determined IC capabilities and allocates resources for sidelink communication 220 based on the reported IC capabilities. The base station then sends a resource grant 235 to the transmitting UE 210 providing an indication of the resources allocated for sidelink communication 220.

[0105] The transmitting UE 210 receives the resource grant 235 (including an indication of the resources allocated for the sidelink communication 220) and sends the sidelink communication 220 to the receiving UE using the allocated resources.

[0106] Figure 3 An example of a process flow 300 for supporting techniques for interference cancellation capability awareness for unicast or multicast sidelink communications according to aspects of the present disclosure is illustrated. In some examples, aspects of the process flow 300 may implement or be implemented by aspects of the wireless communication system 100 and the wireless communication system 200. Specifically, the process flow 300 illustrates a signaling process for implementing interference cancellation aware mode 1 sidelink scheduling.

[0107] The process flow 300 includes a base station 305, a transmitting UE 310 from which a sidelink communication is to be transmitted, and one or more receiving UEs 315 to which a sidelink communication is to be transmitted. The base station 305, the transmitting UE 310, and the receiving UE 315 may be reference Figure 1 and Figure 2 Examples of UE 115, network entity 105 and other wireless devices. For example, Figure 3 The base station 305, the sending UE 310 and the one or more receiving UEs illustrated in the figure may be respectively as follows Figure 2An example of a base station 205, a transmitting UE 210, and one or more receiving UEs 215 is shown and described.

[0108] In some examples, the operations illustrated in process flow 300 may be performed by hardware (e.g., including circuits, processing blocks, logic components, and other components), code executed by a processor (e.g., software), or any combination thereof. The following alternative examples may be implemented in which some of the steps are performed in an order different from the order described or not performed at all. In some cases, the steps may include additional features not mentioned below, or other steps may be added.

[0109] At 320, an indication of IC capability is sent from one or more receiving UEs 315 to the transmitting UE 310. In the case where the sidelink communication is a unicast sidelink communication to be sent to one receiving UE 315a, an indication of IC capability is sent from the receiving UE 315a to the transmitting UE 310. For unicast sidelink communication, the indication of IC capability may be provided in RRC signaling. In the case where the sidelink communication is a multicast sidelink communication to be sent to multiple receiving UEs 315a, 315b ... 315n, an indication of IC capability is sent from each of the multiple receiving UEs 315a, 315b ... 315n to the transmitting UE 310. For multicast sidelink communication, an indication of IC capability may be provided in RRC signaling (wherein an RRC connection is established between the receiving UE and the transmitting UE) or via a MAC control element (CE). The indication of IC capability 320 received from the receiving UE 315 or each receiving UE may indicate whether the receiving UE is capable of performing interference cancellation on the received sidelink communication. The indication of IC capability received from the or each receiving UE 315 may indicate a level of IC capability of the receiving UE 315. The level of IC capability may be symbol level IC (SLIC) capability or codeword level IC capability.

[0110] At 325, the transmitting UE 310 determines IC capabilities for the sidelink communication. Determining the IC capabilities for the sidelink communication may include determining the IC capabilities for the sidelink communication based on the one or more indications received at 320. Determining the IC capabilities for the sidelink communication may include determining that the IC capabilities are present when all receiving UEs 315 are capable of performing interference cancellation on the received sidelink communication. In the event that an indication of IC capabilities is not available or is not received from one or more receiving UEs 315, the transmitting UE 310 may determine that there is no IC capability for the sidelink communication.

[0111] For example, in the case where the sidelink communication is a unicast sidelink communication to be transmitted to one receiving UE 315a, the transmitting UE 310 may determine that there is IC capability for unicast sidelink communication when the receiving UE 315a is capable of performing interference cancellation on the received sidelink communication, as indicated at 320. In the case where the receiving UE 315a is not capable of performing interference cancellation on the received sidelink communication, as indicated at 320, the transmitting UE 310 may determine that there is no IC capability for unicast sidelink communication. In the case where the indication of IC capability received from the receiving UE 315a indicates that the receiving UE 315a is capable of codeword-level interference cancellation, the transmitting UE 310 may determine that the level of IC capability for the sidelink communication is codeword-level interference cancellation. In the case where the indication of IC capability received from the receiving UE 315a indicates that the receiving UE 315a is capable of symbol-level interference cancellation, the transmitting UE 310 may determine that the level of IC capability for the sidelink communication is symbol-level interference cancellation.

[0112] In another example, where the sidelink communication is a multicast sidelink communication to be transmitted to a plurality of receiving UEs 315a, 315b ... 315n, the transmitting UE 310 may determine that there is IC capability for the multicast sidelink communication when all receiving UEs 315a, 315b ... 315n are capable of performing interference cancellation on the received sidelink communication, as indicated at 320. Where one or more of the receiving UEs 315a, 315b ... 315n are unable to perform interference cancellation on the received sidelink communication, the transmitting UE 310 may determine that there is no IC capability for the multicast sidelink communication, as indicated at 320. Where the indication of IC capability received from the receiving UEs 315a, 315b ... 315n indicates that all receiving UEs 315a, 315b ... 315n are capable of codeword-level interference cancellation, the transmitting UE 310 may determine that the level of IC capability for the sidelink communication is codeword-level interference cancellation. In the event that the indication of IC capability received from the receiving UEs 315a, 315b ... 315n indicates that at least one of the receiving UEs 315a, 315b ... 315n is capable of symbol level interference cancellation, the transmitting UE 310 may determine that the level of IC capability for the sidelink communication is symbol level interference cancellation.

[0113] At 330, the sending UE 310 reports the determined IC capability of the side link communication to the base station 305. The report may include an indication of the level of the IC capability of the side link communication. The determined IC capability may be reported to the base station in a side link buffer status report. For example, a field may be provided in a side link buffer status report transmitted by the sending UE 310 to the base station 305, which indicates whether there is an IC capability for the side link communication and optionally indicates the level of the executable IC capability (e.g., codeword level, symbol level). Alternatively, a dedicated MAC CE may be used to report the determined IC capability. A new MAC CE may be introduced to indicate whether there is an IC capability for the side link communication, and optionally indicates the level of the executable IC capability (e.g., codeword level, symbol level). To achieve this, a new logical channel ID may be assigned to the MAC CE indicating the IC capability.

[0114] At 335, the base station 305 allocates resources for sidelink communication based on the reported IC capability. When the reported IC capability indicates that IC capability exists for sidelink communication, allocating resources for sidelink communication may include allocating resources that at least partially overlap with resources allocated to another sidelink communication.

[0115] At 340, the base station 305 sends a resource grant to the transmitting UE 310, the resource grant including an indication of the resources allocated for the sidelink communication. The indication of the allocated resources may include an indication of an interference cancellation assumption for the allocated resources. The indication of the interference cancellation assumption may be indicated using a field in the DCI transmitted from the base station 305 to the transmitting UE 310. In the case where the resources allocated for the sidelink communication include resources that at least partially overlap with the resources allocated for the other sidelink communication, the indication of the interference assumption may indicate that interference cancellation is assumed.

[0116] At 345, the base station 305 can optionally assign an orthogonal demodulation reference signal (DMRS) to the sidelink communication and the other sidelink communication to which the overlapping resources are allocated.

[0117] At 350, the base station 305 may optionally send an indication of the assigned DMRS index for the side link communication and an indication of the DMRS index assigned to the other side link communication to the transmitting UE 310. The indication may indicate the index of the selected DMRS orthogonal cover code and the cyclic shift assigned to the side link communication and the other side link communication to which overlapping resources are allocated. The indication may be included in a DCI message for scheduling the side link communication. For example, an indication of the index of the DMRS orthogonal cover code assigned to the side link communication may be provided in a first field of the DCI message, and an indication of the DMRS index assigned to the other side link communication to which overlapping resources have been allocated may be provided in a second field of the DCI message.

[0118] At 355, the transmitting UE 310 may optionally determine a modulation and coding scheme (MCS) for sidelink communications based on an interference hypothesis for the allocated resources.

[0119] At 360, the transmitting UE 310 may optionally send an indication of the IC assumption to the receiving UE 315. The indication of the interference cancellation assumption may be indicated using a field in the sidelink communication information (SCI) transmitted from the transmitting UE 310 to one or more receiving UEs 315.

[0120] At 365, the transmitting UE 310 may optionally send to one or more receiving UEs 315 an indication of the DMRS index assigned to the sidelink communication and an indication of the DMRS index assigned to the other sidelink communication to which overlapping resources have been allocated.

[0121] At 370, the transmitting UE 310 transmits the sidelink communication to one or more receiving UEs 315 using the allocated resources. In the case where the sidelink communication is a unicast sidelink communication, the transmitting UE 310 transmits the unicast sidelink communication to the receiving UE 315a. In the case where the sidelink communication is a multicast sidelink communication, the transmitting UE 310 transmits the multicast sidelink communication to the receiving UEs 315a, 315b ... 315n. Optionally, the transmitting UE 310 may transmit the sidelink communication to the receiving UE 315 using the determined MCS.

[0122] At 375, the receiving UE 315 can optionally perform interference cancellation on the received side link communication based on an indication of the IC assumption received from the transmitting UE 310. For example, an indication of the IC assumption can be received in the SCI as described above. Typically, the SCI is sent using a lower MCS than the side link communication itself, making it more robust. This allows one or more receiving UEs 315 to decode the SCI in a conventional manner and then determine whether to perform interference cancellation for data channel decoding based on the indication. The receiving UE 315 can selectively perform interference cancellation on the received side link communication based on an indication of the DMRS index optionally received from the transmitting UE 310.

[0123] Figure 4 An example of a process flow 400 for supporting techniques for interference cancellation capability awareness for broadcast sidelink communications according to aspects of the present disclosure is illustrated. In some examples, aspects of the process flow 400 may implement or be implemented by aspects of the wireless communication system 100 and the wireless communication system 200. Specifically, the process flow 400 illustrates a signaling process for implementing interference cancellation aware mode 1 sidelink scheduling.

[0124] The process flow 400 includes a base station 405, a transmitting UE 410 from which a sidelink communication is to be transmitted, and a plurality of receiving UEs 415a ... 415n to which broadcast sidelink communications are to be transmitted. The base station 405, the transmitting UE 410, and the receiving UE 415 may be reference Figure 1 and Figure 2 Examples of UE 115, network entity 105 and other wireless devices. For example, Figure 4 The base station 405, the transmitting UE 410 and the multiple receiving UEs 415a ... 415n illustrated in the figure may be respectively as follows Figure 2 An example of a base station 205, a transmitting UE 210, and one or more receiving UEs 215 is shown and described.

[0125] In some examples, the operations illustrated in process flow 400 may be performed by hardware (e.g., including circuits, processing blocks, logic components, and other components), code executed by a processor (e.g., software), or any combination thereof. The following alternative examples may be implemented in which some of the steps are performed in a different order than described or not performed at all. In some cases, the steps may include additional features not mentioned below, or other steps may be added.

[0126] At 420, the sending UE 410 determines the IC capability for the broadcast side link communication. For the broadcast side link communication, it may not be possible to obtain an indication of the IC capability from each receiving UE 415 to which the broadcast side link communication will be sent. To this end, determining the IC capability for the broadcast side link communication may include determining that there is no IC capability for the broadcast side link communication. Alternatively, the IC capability for the broadcast side link communication may be determined based on a side link application associated with the broadcast side link communication. For example, there may be a side link application that targets a new version UE that has IC capability by default. If the broadcast side link communication is associated with such a side link application, the sending UE 410 may determine that there is IC capability.

[0127] At 425, the transmitting UE 410 reports the determined IC capability of the broadcast sidelink communication to the base station 405. The determined IC capability may be reported to the base station in a sidelink buffer status report. For example, an additional field may be provided in the sidelink buffer status report transmitted by the transmitting UE 410 to the base station 405, which indicates whether there is IC capability for sidelink communication and optionally indicates the level of executable IC capability (e.g., codeword level, symbol level). Alternatively, a dedicated MAC CE may be used to report the determined IC capability. A new MAC CE may be introduced to indicate whether there is IC capability for sidelink communication and optionally indicates the level of executable IC capability (e.g., codeword level, symbol level). To achieve this, a new logical channel ID may be assigned to the MAC CE indicating the IC capability.

[0128] At 430, the base station 405 allocates resources for broadcasting the sidelink communication based on the reported IC capability. When the reported IC capability indicates that IC capability exists for the sidelink communication, allocating resources for the sidelink communication may include allocating resources that at least partially overlap with resources allocated to another sidelink communication.

[0129] At 435, the base station 405 sends a resource grant to the transmitting UE 410, the resource grant including an indication of resources allocated for broadcast sidelink communications. The indication of the allocated resources may include an indication of interference cancellation assumptions for the allocated resources. The indication of the interference cancellation assumptions may be indicated using a field in the DCI transmitted from the base station 405 to the transmitting UE 410. In the event that the resources allocated for the sidelink communications include resources that at least partially overlap with resources allocated for another sidelink communication, the indication of the interference assumptions may indicate that interference cancellation is assumed.

[0130] At 440, the base station 405 can optionally assign an orthogonal demodulation reference signal (DMRS) to the sidelink communication and the other sidelink communication to which the overlapping resources are allocated.

[0131] At 445, the base station 405 may optionally send an indication of the assigned DMRS index for the side link communication and an indication of the DMRS index assigned to the other side link communication to the transmitting UE 410. The indication may indicate the index of the selected DMRS orthogonal cover code and the cyclic shift assigned to the side link communication and the other side link communication to which overlapping resources are allocated. The indication may be included in a DCI message for scheduling the side link communication. For example, an indication of the index of the DMRS orthogonal cover code assigned to the side link communication may be provided in a first field of the DCI message, and an indication of the DMRS index assigned to the other side link communication to which overlapping resources have been allocated may be provided in a second field of the DCI message.

[0132] At 450, the transmitting UE 410 may optionally determine a modulation and coding scheme (MCS) for sidelink communications based on an interference hypothesis for the allocated resources.

[0133] At 455, the transmitting UE 410 may optionally send an indication of the IC assumption to the plurality of receiving UEs 415. The indication of the interference cancellation assumption may be indicated using a field in the SCI transmitted from the transmitting UE 410 to the receiving UEs 415.

[0134] At 460, the transmitting UE 410 may optionally transmit to the plurality of receiving UEs 415 an indication of the DMRS index assigned to the side link communication and an indication of the DMRS index assigned to the other side link communication to which overlapping resources have been allocated.

[0135] At 465, the transmitting UE 410 transmits the broadcast sidelink communication using the allocated resources to the plurality of receiving UEs 415. Alternatively, the transmitting UE 410 may transmit the sidelink communication to the receiving UEs 415 using the determined MCS.

[0136] At 470, the receiving UE 415 can optionally perform interference cancellation on the received side link communication based on an indication of the IC assumption received from the transmitting UE 410. For example, an indication of the IC assumption can be received in the SCI as described above. Typically, the SCI is sent using a lower MCS than the side link communication itself, making it more robust. This allows the receiving UE 415 to decode the SCI in a conventional manner and then determine whether to perform interference cancellation for data channel decoding based on the indication. The receiving UE 415 can selectively perform interference cancellation on the received side link communication based on an indication of the DMRS index optionally received from the transmitting UE 410.

[0137] Figure 5 A diagram 500 of a device 505 supporting techniques for interference cancellation capability awareness for sidelink communications according to aspects of the present disclosure is shown. The device 505 may be an example of aspects of a transmitting UE 310 or a transmitting UE 410 or a UE 115 as described herein. The device 505 includes a receiver 510, a transmitter 515, and a communication manager 520. The device 505 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0138] The receiver 510 may provide means for receiving information such as packets associated with various information channels (e.g., control channels, data channels, and information channels related to techniques for interference cancellation capability awareness for sidelink communications), user data, control information, or any combination thereof. The information may be communicated to other components of the device 505. The receiver 510 may utilize a single antenna or a collection of multiple antennas.

[0139] The transmitter 515 may provide means for transmitting signals generated by other components of the device 505. For example, the transmitter 515 may transmit information such as packets associated with various information channels (e.g., control channels, data channels, and information channels related to techniques for interference cancellation capability awareness for sidelink communications), user data, control information, or any combination thereof. In some examples, the transmitter 515 may be co-located with the receiver 510 in a transceiver module. The transmitter 515 may utilize a single antenna or a collection of multiple antennas.

[0140] The device or its various components may be examples of means for performing various aspects of the techniques for interference cancellation capability awareness for sidelink communications as described herein. Figure 5 In an embodiment of the present invention, the communication manager 520 includes an IC capability determination component 530, an IC capability reporting component 535, a resource allocation receiving component 540, a side link communication sending component 545, and optionally includes an IC capability receiving component 525, an MCS determination component 550, an IC hypothesis sending component 555, a DMRS index receiving component 560, and a DMRS index sending component 565. In some examples, the communication manager 520 or its various components may be configured to use or otherwise cooperate with the receiver 510, the transmitter 515, or both to perform various operations (e.g., determine, report, receive, send). For example, the communication manager 520 may receive information from the receiver 510, transmit information to the transmitter 515, or be integrated with the receiver 510, the transmitter 515, or both to obtain information, output information, or perform various other operations as described herein.

[0141] According to the examples disclosed herein, the communication manager 520 may support wireless communication at the transmitting UE. The IC capability receiving component 525 may be configured to or otherwise support a component for receiving an indication of interference cancellation capability from each of the one or more receiving UEs to which the sidelink communication will be sent. The IC capability determining component 530 may be configured to or otherwise support a component for determining the IC capability of the sidelink communication, wherein the sidelink communication will be sent to one or more receiving UEs. The IC capability reporting component 535 may be configured to or otherwise support a component for reporting the determined IC capability of the sidelink communication to the base station. The resource allocation receiving component 540 may be configured to or otherwise support a component for receiving an indication of resources allocated for the sidelink communication based on the reported IC capability from the base station. The sidelink communication sending component 545 may be configured to or otherwise support a component for sending the sidelink communication to one or more receiving UEs using the allocated resources. The MCS determining component 550 may be configured to or otherwise support a component for determining the modulation and decoding scheme of the sidelink communication based on the IC assumption of the allocated resources. The IC hypothesis transmission component 555 may be configured to or otherwise support means for transmitting an indication of the IC hypothesis to one or more receiving UEs. The DMRS index reception component 560 may be configured to or otherwise support means for receiving from a base station an indication of a demodulation reference signal DMRS index assigned to a side link communication and an indication of a DMRS index assigned to another side link communication to which overlapping resources have been allocated. The DMRS index transmission component 565 may be configured to or otherwise support means for transmitting to one or more receiving UEs an indication of a demodulation reference signal DMRS index assigned to a side link communication and an indication of a DMRS index assigned to another side link communication to which overlapping resources have been allocated.

[0142] Figure 6 A diagram 600 of a device 605 supporting techniques for interference cancellation capability awareness for sidelink communications according to aspects of the present disclosure is shown. The device 605 may be an example of aspects of a base station 305 or a base station 405 or a network entity 105 as described herein. The device 605 includes a receiver 610, a transmitter 615, and a communication manager 620. The device 605 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0143] The receiver 610 may provide means for receiving information such as packets associated with various information channels (e.g., control channels, data channels, and information channels related to techniques for interference cancellation capability awareness for sidelink communications), user data, control information, or any combination thereof. The information may be communicated to other components of the device 605. The receiver 610 may utilize a single antenna or a collection of multiple antennas.

[0144] The transmitter 615 may provide means for transmitting signals generated by other components of the device 605. For example, the transmitter 615 may transmit information such as packets associated with various information channels (e.g., control channels, data channels, and information channels related to techniques for interference cancellation capabilities for sidelink communications), user data, control information, or any combination thereof. In some examples, the transmitter 615 may be co-located with the receiver 610 in a transceiver module. The transmitter 615 may utilize a single antenna or a collection of multiple antennas.

[0145] The device or its various components may be examples of means for performing various aspects of the techniques for interference cancellation awareness for sidelink communications as described herein. Figure 6 In an embodiment of the present invention, the communication manager 620 includes an IC capability report receiving component 625, a resource allocation component 630, a resource grant sending component 635, and optionally a DMRS index assignment component 640 and a DMRS index sending component 645. In some examples, the communication manager 620 or its various components may be configured to use or otherwise cooperate with the receiver 610, the transmitter 615, or both to perform various operations (e.g., determine, report, receive, send). For example, the communication manager 620 may receive information from the receiver 610, transmit information to the transmitter 615, or integrate with the receiver 610, the transmitter 615, or both to obtain information, output information, or perform various other operations as described herein.

[0146] According to the examples disclosed herein, the communication manager 620 may support wireless communication at the base station. The IC capability report receiving component 625 may be configured to or otherwise support a component for receiving a report of the IC capability of the side link communication to be sent by the UE from the UE. The resource allocation component 630 may be configured to or otherwise support a component for allocating resources for the side link communication based on the reported IC capability. The resource grant sending component 635 may be configured to or otherwise support a component for sending an indication of the resources allocated for the side link communication to the UE. The DMRS index assignment component 640 may be configured to or otherwise support a component for assigning orthogonal DMRS to the side link communication and the other side link communication to which overlapping resources are allocated. The DMRS index sending component 645 may be configured to or otherwise support a component for sending an indication of the assigned DMRS index of the side link communication to the UE and an indication of the DMRS index assigned to the other side link communication.

[0147] Figure 7 A diagram 700 of a device 705 supporting techniques for interference cancellation capability awareness for sidelink communications in accordance with aspects of the present disclosure is shown. The device 705 may be an example of aspects of a receiving UE 315 or a receiving UE 415 or a UE 115 as described herein. The device 705 includes a receiver 710, a transmitter 715, and a communication manager 720. The device 705 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0148] The receiver 710 may provide means for receiving information such as packets associated with various information channels (e.g., control channels, data channels, and information channels related to techniques for interference cancellation capability awareness for sidelink communications), user data, control information, or any combination thereof. The information may be communicated to other components of the device 705. The receiver 510 may utilize a single antenna or a collection of multiple antennas.

[0149] The transmitter 715 may provide means for transmitting signals generated by other components of the device 705. For example, the transmitter 715 may transmit information such as packets associated with various information channels (e.g., control channels, data channels, and information channels related to techniques for interference cancellation capability awareness for sidelink communications), user data, control information, or any combination thereof. In some examples, the transmitter 715 may be co-located with the receiver 710 in a transceiver module. The transmitter 715 may utilize a single antenna or a collection of multiple antennas.

[0150] The device or its various components may be examples of means for performing various aspects of the techniques for interference cancellation capability awareness for sidelink communications as described herein. Figure 7 In an embodiment of the present invention, the communication manager 720 includes an IC capability sending component 725, a side link communication receiving component 730, and optionally an IC hypothesis receiving component 735, an IC execution component 740, and a DMRS index receiving component 745. In some examples, the communication manager 720 or its various components may be configured to use or otherwise cooperate with the receiver 710, the transmitter 715, or both to perform various operations (e.g., determine, report, receive, send). For example, the communication manager 720 may receive information from the receiver 710, transmit information to the transmitter 715, or be integrated in combination with the receiver 710, the transmitter 715, or both to obtain information, output information, or perform various other operations as described herein.

[0151] According to the examples disclosed herein, the communication manager 720 may support wireless communications at the receiving UE. The IC capability sending component 725 may be configured to or otherwise support a component for sending an indication of IC capabilities to a sending UE from which a sidelink communication will be received. The sidelink communication receiving component 730 may be configured to or otherwise support a component for receiving a sidelink communication from a sending UE using resources allocated to the sending UE based at least in part on an indication of IC capabilities. The IC assumption receiving component 735 may be configured to or otherwise support a component for receiving an indication of an IC assumption of the allocated resources from the sending UE. The IC execution component 740 may be configured to or otherwise support a component for selectively performing interference cancellation on the received sidelink communication based on the indication of the IC assumption. The DMRS index receiving component 745 may be configured to or otherwise support a component for receiving an indication of a DMRS index assigned to the sidelink communication and an indication of a DMRS index assigned to another other sidelink communication that has been allocated overlapping resources from the sending UE. IC execution component 740 may be configured or otherwise support means for selectively performing interference cancellation on received sidelink communications based on an indication of a DMRS index.

[0152] Figure 8 A flow chart of a method 800 for supporting techniques for interference cancellation capability awareness for sidelink communications according to aspects of the present disclosure is shown. The operations of the method 800 may be implemented by a transmitting UE or components thereof as described herein. For example, the operations of the method 800 may be implemented by a transmitting UE or components thereof as described in reference to Figure 1 and Figure 5 The UE 115 described herein may be executed. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0153] At 805, the method includes determining IC capabilities for sidelink communications to be sent to one or more receiving UEs. The operations of 805 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 805 may be performed as described in reference to Figure 5 The IC capability determination component 530 is executed.

[0154] At 810, the method includes reporting the determined IC capability of the sidelink communication to the base station. The operations of 810 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 810 may be performed as described in reference to Figure 5 The IC capability reporting component 535 is used to execute.

[0155] At 815, the method includes receiving from the base station an indication of resources allocated for sidelink communication based on the reported IC capabilities. The operations of 815 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 815 may be performed as described in reference to Figure 5 The resource allocation receiving component 540 executes.

[0156] At 820, the method includes sending sidelink communications to one or more other UEs using the allocated resources. The operations of 820 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 820 may be performed as described in reference to Figure 5 The side link communication sending component 545 executes.

[0157] Fig. 9 A flow chart of a method 900 for supporting techniques for interference cancellation capability awareness for sidelink communications according to aspects of the present disclosure is shown. The operations of the method 900 may be implemented by a base station or components thereof as described herein. For example, the operations of the method 900 may be implemented by a base station or components thereof as described herein. Figure 1 and Figure 6 The network entity 105 or base station described above may be executed. In some examples, the base station may execute an instruction set to control the functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the described functions.

[0158] At 905, the method includes receiving from the transmitting UE a report of the IC capabilities of the sidelink communication to be transmitted by the UE. The operations of 905 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 905 may be performed as described in reference to Figure 6 The IC capability report receiving component 625 is used to execute.

[0159] At 910, the method includes allocating resources for sidelink communication based on the reported IC capabilities. The operations of 910 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 910 may be performed as described in reference to Figure 6 The resource allocation component 630 is used to execute.

[0160] At 915, the method includes sending an indication of resources allocated for sidelink communication to the UE. The operations of 915 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 915 may be performed as described in reference to Figure 6 The resource grant sending component 635 is executed.

[0161] Fig.10 1 is a flow chart of a method 1000 for supporting techniques for interference cancellation capability awareness for sidelink communications according to aspects of the present disclosure. The operations of the method 800 may be implemented by a receiving UE or a component thereof as described herein. For example, the operations of the method 1000 may be implemented by a receiving UE or a component thereof as described in reference to Figure 1 and Figure 7 The UE 115 described herein may be executed. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0162] At 1005, the method includes sending an indication of IC capabilities to a transmitting UE from which sidelink communications will be received. The operations of 1005 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1005 may be performed as described in reference to Figure 7 The IC capability sending component 725 executes.

[0163] At 1010, the method includes receiving a sidelink communication from a transmitting UE using resources allocated to the transmitting UE based at least in part on an indication of IC capabilities. The operations of 1010 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1010 may be performed as described in reference to Figure 7 The side link communication receiving component 730 executes.

[0164] Certain aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having instructions stored (and / or encoded) thereon, which instructions can be executed by one or more processors to perform the operations described herein, such as for performing the operations described herein and Figure 8 , Fig. 9 and / or Fig.10 Instructions for the operations illustrated in .

[0165] A summary of some aspects of the disclosure is provided below.

[0166] Aspect 1 is a method for wireless communication at a UE. The method includes determining interference cancellation IC capabilities of sidelink communications, where the sidelink communications are to be sent to one or more other UEs. The method includes reporting the determined IC capabilities of the sidelink communications to a base station. The method also includes receiving from the base station an indication of resources allocated for the sidelink communications based on the reported IC capabilities. The method also includes sending the sidelink communications to the one or more other UEs using the allocated resources.

[0167] In aspect 2, the method according to aspect 1 also includes receiving an indication of IC capability from each of the one or more other UEs to which the sidelink communication will be sent, wherein determining the IC capability of the sidelink communication includes determining the IC capability of the sidelink communication based on one or more received indications.

[0168] In aspect 3, the indication of IC capability received from each of the one or more other UEs according to aspect 2 indicates whether the UE of the one or more other UEs is capable of performing interference cancellation on the received sidelink communication.

[0169] In aspect 4, determining the IC capability of the sidelink communication according to any one of aspects 2 or 3 includes determining that IC capability is present when all of the one or more other UEs are capable of performing interference cancellation on the received sidelink communication.

[0170] In aspect 5, the indication of IC capability received from the UE among the one or more other UEs according to any one of aspects 2 to 4 indicates a level of IC capability of the UE among the one or more other UEs.

[0171] In aspect 6, the level of IC capability according to aspect 5 is symbol level interference cancellation (SLIC) capability or codeword level IC capability.

[0172] In aspect 7, determining the IC capability of the sidelink communication according to aspect 5 or aspect 6 includes determining the level of IC capability of the sidelink communication based on the level of IC capability of each UE in the one or more other UEs.

[0173] Aspect 8 relates to a method according to any one of Aspects 2 to 7, wherein the sidelink communication is a unicast sidelink communication to be sent to one other UE; the indication of IC capability is received from the one other UE to which the unicast sidelink communication is to be sent; and the determined IC capability of the unicast sidelink communication is determined based on the indication of IC capability received from the one other UE.

[0174] Aspect 9 relates to a method according to any one of Aspects 2 to 7, wherein the side link communication is a multicast side link communication to be sent to multiple other UEs; the indication of IC capability is received from each of the multiple other UEs to which the multicast side link communication is to be sent; and the determined IC capability of the multicast side link communication is determined based on the indication of IC capability received from the multiple other UEs.

[0175] Aspect 10 relates to the method according to aspect 1, wherein the sidelink communication is a broadcast sidelink communication to be sent to multiple other UEs; and determining the IC capability of the sidelink communication includes determining that IC capability does not exist for the broadcast sidelink communication.

[0176] Aspect 11 relates to a method according to Aspect 1, wherein the side link communication is a broadcast side link communication to be sent to multiple other UEs; and determining the IC capability of the side link communication includes determining the IC capability of the broadcast side link communication based on a side link application associated with the broadcast side link communication.

[0177] In aspect 12, the indication of the allocated resources received from the base station according to any one of aspects 1 to 11 comprises an indication of an IC assumption for the allocated resources.

[0178] In aspect 13, the method according to aspect 12 also includes determining a modulation and coding scheme MCS for the sidelink communication based on the IC assumption for the allocated resources; and sending the sidelink communication to the one or more other UEs using the determined MCS.

[0179] In aspect 14, the method according to aspect 12 or aspect 13 further comprises sending an indication of the IC assumption to the one or more other UEs.

[0180] In aspect 15, the method according to any one of aspects 1 to 14 also includes receiving from the base station an indication of a demodulation reference signal DMRS index assigned to the side link communication and an indication of a DMRS index assigned to another side link communication to which overlapping resources have been allocated.

[0181] In aspect 16, the method according to aspect 15 also includes sending the indication of the DMRS index assigned to the side link communication and the indication of the DMRS index assigned to the other side link communication to which overlapping resources have been allocated to the one or more other UEs.

[0182] Aspect 17 is a method of wireless communication at a base station. The method includes receiving a report of IC capabilities for a sidelink communication to be sent by the UE from a UE. The method also includes allocating resources for the sidelink communication based on the reported IC capabilities. The method also includes sending an indication of the resources allocated for the sidelink communication to the UE.

[0183] In aspect 18, the indication of the allocated resources sent to the UE according to aspect 17 comprises an indication of an IC assumption for the allocated resources.

[0184] In aspect 19, allocating resources for the side link communication according to aspect 17 or aspect 18 includes allocating resources that at least partially overlap with resources allocated to another side link communication when the reported IC capability indicates that IC capability exists for the side link communication.

[0185] In aspect 20, the indication of the IC hypothesis according to aspect 18 indicates assuming interference cancellation.

[0186] Aspect 21 relates to the method according to aspect 19, further comprising assigning orthogonal DMRS to the side link communication and the other side link communication to which overlapping resources are allocated.

[0187] Aspect 22 relates to the method according to aspect 21, the method further comprising sending to the UE an indication of the assigned DMRS index for the sidelink communication and an indication of the DMRS index assigned to the other sidelink communication.

[0188] Aspect 23 is a method of wireless communication at a UE. The method includes sending an indication of IC capabilities to another UE from which a sidelink communication will be received; and receiving the sidelink communication from the other UE using resources allocated to the other UE based at least in part on the indication of IC capabilities.

[0189] Aspect 24 relates to the method according to aspect 23, the method further comprising receiving an indication of an IC assumption for the allocated resources from the other UE.

[0190] Aspect 25 relates to the method according to aspect 24, further comprising selectively performing interference cancellation on the received sidelink communication based on the indication of the IC hypothesis.

[0191] Aspect 26 relates to a method according to any one of Aspects 23 to 25, the method further comprising receiving, from the other UE, an indication of a DMRS index assigned to the sidelink communication and an indication of a DMRS index assigned to another other sidelink communication to which overlapping resources have been allocated.

[0192] Aspect 27 relates to the method according to aspect 26, the method further comprising selectively performing interference cancellation on the received sidelink communication based on the indication of the DMRS index.

[0193] Aspect 28 is an apparatus for wireless communication at a UE, the apparatus comprising at least one component for performing a method according to any one of aspects 1 to 16.

[0194] Aspect 29 is an apparatus for wireless communication at a base station, the apparatus comprising at least one component for performing a method according to any one of aspects 17 to 22.

[0195] Aspect 30 is an apparatus for wireless communication at a UE, the apparatus comprising at least one component for performing a method according to any one of aspects 23 to 27.

[0196] Aspect 31 is an apparatus for wireless communication at a UE, the apparatus comprising at least one processor and a memory coupled to the at least one processor, the at least one processor and the memory being configured to perform the method according to any one of aspects 1 to 16.

[0197] Aspect 32 is an apparatus for wireless communication at a base station, the apparatus comprising at least one processor and a memory coupled to the at least one processor, the at least one processor and the memory being configured to perform a method according to any one of aspects 17 to 22.

[0198] Aspect 33 is an apparatus for wireless communication at a UE, the apparatus comprising at least one processor and a memory coupled to the at least one processor, the at least one processor and the memory being configured to perform a method according to any one of aspects 23 to 27.

[0199] Aspect 34 is a non-transitory computer-readable medium storing instructions, which, when executed by a processor at a UE, causes the processor to perform a method according to any one of aspects 1 to 16.

[0200] Aspect 35 is a non-transitory computer-readable medium storing instructions, which, when executed by a processor at a base station, causes the processor to perform a method according to any one of aspects 17 to 22.

[0201] Aspect 36 is a non-transitory computer-readable medium storing instructions, which, when executed by a processor at a UE, causes the processor to perform a method according to any one of aspects 23 to 27.

[0202] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the various aspects.

[0203] When used herein with reference to the present disclosure, the words “comprising” and the words “having / including” are used to specify the presence of stated features, integers, steps or components, but do not exclude the presence or addition of one or more other features, integers, steps, components or groups thereof.

[0204] It should be understood that certain features of the present disclosure described in the context of separate embodiments for clarity may also be provided in combination in a single embodiment. Conversely, for brevity, various features of the present disclosure described in the context of a single embodiment may also be provided separately or in any suitable sub-combination.

Claims

1. A method for wireless communication at a user equipment (UE), the method comprising: determining interference cancellation IC capabilities for sidelink communications to be sent to one or more other UEs; reporting the determined IC capabilities of the sidelink communication to a base station; receiving, from the base station, an indication of resources allocated for the sidelink communication based on the reported IC capabilities; as well as The sidelink communication is sent to the one or more other UEs using the allocated resources.

2. The method according to claim 1, further comprising: receiving an indication of IC capabilities from each of the one or more other UEs to which the sidelink communication is to be sent; and Wherein determining the IC capabilities of the sidelink communication comprises determining the IC capabilities of the sidelink communication based on one or more received indications.

3. The method of claim 2, wherein the indication of IC capability received from each of the one or more other UEs indicates whether the UE in the one or more other UEs is capable of performing interference cancellation on the received sidelink communication.

4. The method of claim 2, wherein determining the IC capability of the sidelink communication comprises determining that IC capability is present when all of the one or more other UEs are capable of performing interference cancellation on the received sidelink communication.

5. The method of claim 2, wherein the indication of IC capability received from a UE among the one or more other UEs indicates a level of IC capability of the UE among the one or more other UEs. 6 . The method of claim 5 , wherein the level of IC capability is symbol level interference cancellation (SLIC) capability or codeword level IC capability.

7. The method of claim 5, wherein determining the IC capability of the sidelink communication comprises determining the level of IC capability of the sidelink communication based on the level of IC capability of each of the one or more other UEs.

8. The method according to claim 2, wherein: The sidelink communication is a unicast sidelink communication to be sent to one other UE; the indication of IC capability is received from the one other UE to which the unicast sidelink communication is to be sent; and The determined IC capability of the unicast sidelink communication is determined based on the indication of IC capability received from the one other UE.

9. The method according to claim 2, wherein: The sidelink communication is a multicast sidelink communication to be sent to a plurality of other UEs; The indication of IC capability is received from each of the plurality of other UEs to which the multicast sidelink communication is to be sent; and The determined IC capabilities of the multicast sidelink communication are determined based on the indications of IC capabilities received from the plurality of other UEs.

10. The method of claim 1, wherein: The sidelink communication is a broadcast sidelink communication to be sent to a plurality of other UEs; and Determining IC capability for the sidelink communication includes determining that IC capability does not exist for the broadcast sidelink communication.

11. The method according to claim 1, wherein: The sidelink communication is a broadcast sidelink communication to be sent to a plurality of other UEs; and Determining the IC capabilities of the sidelink communication includes determining the IC capabilities of the broadcast sidelink communication based on a sidelink application associated with the broadcast sidelink communication.

12. The method of claim 1, wherein: The indication of allocated resources received from the base station includes an indication of an IC assumption for the allocated resources.

13. The method according to claim 12, further comprising: determining a modulation coding scheme (MCS) for the sidelink communication based on the IC assumption for the allocated resources; as well as The sidelink communication is sent to the one or more other UEs using the determined MCS.

14. The method according to claim 12, further comprising: An indication of the IC hypothesis is sent to the one or more other UEs.

15. The method according to claim 14, further comprising: An indication of a demodulation reference signal (DMRS) index assigned to the sidelink communication and an indication of a DMRS index assigned to another sidelink communication to which overlapping resources have been allocated are received from the base station.

16. The method according to claim 15, further comprising: The indication of the demodulation reference signal (DMRS) index assigned to the sidelink communication and the indication of the DMRS index assigned to the other sidelink communication to which overlapping resources have been allocated are sent to the one or more other UEs.

17. A method for wireless communication at a base station, the method comprising: receiving, from a user equipment (UE), a report of interference cancellation (IC) capabilities for sidelink communications to be sent by the UE; allocating resources for the sidelink communication based on the reported IC capabilities; as well as An indication of the resources allocated for the sidelink communication is sent to the UE.

18. The method of claim 17, wherein the indication of the allocated resources sent to the UE comprises an indication of interference cancellation (IC) assumptions for the allocated resources.

19. The method of claim 18, wherein allocating resources for the sidelink communication comprises allocating resources that at least partially overlap with resources allocated to another sidelink communication when the reported IC capability indicates that IC capability exists for the sidelink communication.

20. The method of claim 19, wherein the indication of the IC hypothesis indicates assuming interference cancellation.

21. The method according to claim 19, further comprising: An orthogonal demodulation reference signal (DMRS) is assigned to the side link communication and the other side link communication to which overlapping resources are allocated.

22. The method according to claim 21, further comprising: An indication of the assigned DMRS index for the sidelink communication and an indication of the DMRS index assigned to the other sidelink communication are sent to the UE.

23. A method for wireless communication at a user equipment (UE), the method comprising: sending an indication of interference cancellation IC capability to another UE from which sidelink communications will be received; as well as The sidelink communication is received from the other UE using resources allocated to the other UE based at least in part on the indication of IC capabilities.

24. The method according to claim 23, further comprising: An indication of an IC assumption for the allocated resources is received from the other UE.

25. The method according to claim 24, further comprising: Interference cancellation is selectively performed on the received sidelink communications based on the indication of the IC hypothesis.

26. The method according to claim 24, further comprising: An indication of a demodulation reference signal (DMRS) index assigned to the sidelink communication and an indication of a DMRS index assigned to another other sidelink communication to which overlapping resources have been allocated are received from the other UE.

27. The method according to claim 25, further comprising: Interference cancellation is selectively performed on the received sidelink communication based on the indication of the DMRS index.

28. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: means for determining interference cancellation IC capabilities for sidelink communications to be sent to one or more other UEs; means for reporting the determined IC capabilities of the sidelink communication to a base station; means for receiving from the base station an indication of resources allocated for the sidelink communication based on the reported IC capabilities; as well as Means for transmitting the sidelink communication to the one or more other UEs using the allocated resources.

29. An apparatus for wireless communication at a base station, the apparatus comprising: means for receiving from a user equipment UE a report of interference cancellation IC capabilities of a sidelink communication to be sent by the UE; means for allocating resources for said sidelink communication based on the reported IC capabilities; as well as Means for sending an indication to the UE of the resources allocated for the sidelink communication.

30. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: means for sending an indication of interference cancellation IC capability to another UE from which sidelink communications will be received; as well as Means for receiving the sidelink communication from the other UE using resources allocated to the other UE based at least in part on the indication of IC capabilities.

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