Method for interference measurement and reporting in a sidelink

Abstract

Certain aspects of the present disclosure provide techniques for interference measurement and reporting in a sidelink. One aspect provides a method of wireless communication by a first user equipment (UE), the method comprising receiving signaling indicating resources within a sidelink resource pool configured for sidelink interference measurements. The method also includes sending a first interference report to at least a second UE, the first interference report based on the interference measurements made on the indicated resources.

Description

[0001] This application claims the benefit of U.S. Patent Application No. 17 / 744,518, filed on May 13, 2022; the entire contents of which are incorporated herein by reference. Background Art

[0002] Aspects of the present disclosure relate to wireless communications and, more particularly, to techniques for interference measurement and reporting in a sidelink.

[0003] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, broadcast, or other similar types of services. These wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or other resources) with these users. Multiple access technologies may rely on any of code division, time division, frequency division, orthogonal frequency division, single carrier frequency division, or time division synchronous code division, to name just a few examples. These and other multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, and even global level.

[0004] Although wireless communication systems have made tremendous technological progress over the years, challenges still exist. For example, complex and dynamic environments can still attenuate or block signals between wireless transmitters and wireless receivers, undermining various established wireless channel measurement and reporting mechanisms for managing and optimizing the use of limited wireless channel resources. Therefore, there is a need to further improve wireless communication systems to overcome various challenges. Summary of the invention

[0005] One aspect provides a method for wireless communication by a first user equipment (UE), the method comprising: receiving signaling indicating resources within a sidelink resource pool that are configured for sidelink interference measurement; and sending a first interference report to at least a second UE, the first interference report being based on interference measurements performed on the indicated resources.

[0006] One aspect provides a method for wireless communication by a second user equipment, the method comprising: receiving a first interference report from a first UE, the first interference report being based on interference measurements performed by the first UE on resources within a sidelink resource pool that are configured for sidelink interference measurements; and using information in the first interference report to perform channel estimation on a sidelink channel between the first UE and the second UE.

[0007] Other aspects provide: an apparatus operable to, configured to, or otherwise adapted to perform the aforementioned method and those described elsewhere herein; a non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of the apparatus, cause the apparatus to perform the aforementioned method and those described elsewhere herein; a computer program product embodied on a computer-readable storage medium, the computer program product comprising code for performing the aforementioned method and those described elsewhere herein; and an apparatus comprising components for performing the aforementioned method and those described elsewhere herein. By way of example, an apparatus may include a processing system, a device having a processing system, or a processing system cooperating through one or more networks.

[0008] For purposes of illustration, the following description and drawings set forth certain features. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings depict certain features of the various aspects described herein and should not be considered to limit the scope of the disclosure.

[0010] Figure 1 is a block diagram conceptually illustrating an example wireless communication network.

[0011] Figure 2 is a block diagram conceptually illustrating aspects of examples of base stations and user equipment.

[0012] Figure 3A , Figure 3B , Figure 3C and Figure 3D Various example aspects of data structures for a wireless communication network are described.

[0013] Figure 4 A diagrammatic schematic diagram of an example vehicle-to-everything (V2X) system is shown in accordance with some aspects of the present disclosure.

[0014] Figure 5 A diagrammatic representation of an example V2X system is shown in accordance with some aspects of the present disclosure.

[0015] Figure 6 An example sidelink slot structure is depicted.

[0016] Figure 7 Illustrated are example allocations of resource pools for sidelink communications in accordance with certain aspects of the present disclosure.

[0017] Figure 8 Example sidelink deployments in accordance with certain aspects of the present disclosure are illustrated.

[0018] Fig. 9An example call flow diagram is illustrated in accordance with certain aspects of the present disclosure.

[0019] Fig.10 Example sidelink deployments according to some aspects of the present disclosure are illustrated.

[0020] Fig.11 Examples of resources used for interference measurements in accordance with certain aspects of the present disclosure are illustrated.

[0021] Fig.12 An example call flow diagram is illustrated in accordance with certain aspects of the present disclosure.

[0022] Fig.13 and Fig.14

[0013] Example processes for wireless communications in accordance with aspects of the present disclosure are depicted.

[0023] Fig.15 and Fig.16 An example communications device in accordance with aspects of the present disclosure is depicted. DETAILED DESCRIPTION

[0024] Aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for interference measurement and reporting in deployments involving sidelink communications between user equipments (UEs).

[0025] Various sidelink deployments can support applications with services that require high reliability, such as ultra-reliable low-latency communication (URLLC) services. Sidelink applications may also involve virtual reality (VR), augmented reality (AR), or extended reality (XR), which require reliable delivery of services with strict timing to avoid adverse effects on user experience. One factor that negatively affects reliability is interference from, for example, UEs that share a common resource pool (RP) for sidelink communications or other nearby UEs whose transmissions overlap with sidelink transmissions. Unfortunately, there is currently no interference measurement (IM) mechanism defined for the sidelink.

[0026] However, aspects of the present disclosure provide mechanisms that allow a UE to estimate sidelink interference parameters for the purposes of IM and sidelink IM (SL IM) reporting. SL IM reporting can help improve channel estimation and, therefore, overall reliability.

[0027] According to certain aspects, existing resources configured for sidelink communications can be used for IM purposes. For example, configured physical sidelink shared channel (PSSCH) resources and / or demodulated reference signal (DMRS) resources can be punctured or rate matched around to provide resources for interference measurement. One advantage of this method is that the puncturing or rate matching can be controlled to provide more or less resources for IM purposes, thereby allowing adaptation to operating conditions. For example, when enhanced reliability is required, more resources can be used for IM (and more interference is observed), or fewer resources can be used for IM, which means more resources can be used to increase throughput.

[0028] As described herein, a node (which may be referred to as a node, a network node, a network entity, or a wireless node) may include, may be, or may be included in (e.g., as a component of) a base station (e.g., any base station described herein), a UE (e.g., any UE described herein), a network controller, an apparatus, a device, a computing system, an integrated access and backhaul (IAB) node, a distributed unit (DU), a central unit (CU), a remote / radio unit (RU) (which may also be referred to as a remote radio unit (RRU)), and / or another processing entity configured to perform any of the techniques described herein. For example, the network node may be a UE. As another example, the network node may be a base station or a network entity. As another example, a first network node may be configured to communicate with a second network node or a third network node. In one aspect of this example, the first network node may be a UE, the second network node may be a base station, and the third network node may be a UE. In another aspect of this example, the first network node may be a UE, the second network node may be a base station, and the third network node may be a base station. In yet other aspects of this example, the first network node, the second network node, and the third network node may be different relative to these examples. Similarly, references to UE, base station, device, equipment, computing system, etc. may include disclosure of UE, base station, device, equipment, computing system, etc. as a network node. For example, a disclosure that a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node. Consistent with the present disclosure, once a specific example is expanded according to the present disclosure (e.g., a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node), a broader example of a narrower example may be interpreted in reverse, but in a broad, open-ended manner. In the above example where a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node, the first network node may refer to a first UE configured to receive information, a first base station, a first device, a first device, a first computing system, a first group of one or more components, a first processing entity, etc.; and the second network node may refer to a second UE, a second base station, a second device, a second device, a second computing system, a second group of one or more components, a second processing entity, etc.

[0029] As described herein, different terms may be used in various aspects to describe the communication of information (e.g., any information, signal, etc.). Disclosure of one communication term includes disclosure of other communication terms. For example, a first network node may be described as being configured to send information to a second network node. In this example and consistent with the present disclosure, disclosure that the first network node is configured to send information to the second network node includes disclosure that the first network node is configured to provide, transmit, output, communicate, or send information to the second network node. Similarly, in this example and consistent with the present disclosure, disclosure that the first network node is configured to send information to the second network node includes disclosure that the second network node is configured to receive, obtain, or decode information provided, transmitted, output, communicated, or sent by the first network node.

[0030] Introduction to Wireless Communication Networks

[0031] Figure 1 An example of a wireless communication network 100 is depicted in which various aspects described herein may be implemented.

[0032] In general, the wireless communication network 100 includes a base station (BS) 102, a user equipment (UE) 104, one or more core networks (such as an evolved packet core (EPC) 160 and a 5G core (5GC) network 190), which interoperate to provide wireless communication services.

[0033] BS 102 may provide an access point to EPC 160 and / or 5GC 190 for UE 104, and may perform one or more of the following functions: delivery of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracking, RAN information management (RIM), paging, positioning, delivery of warning messages, and other functions. In various contexts, a base station may include and / or be referred to as a gNB, Node B, eNB, ng-eNB (e.g., an eNB that has been enhanced to provide connectivity to both EPC 160 and 5GC 190), access point, transceiver base station, radio base station, radio transceiver, or transceiver functional unit, or a transmitting and receiving point.

[0034] A base station (such as BS102) may include components located at a single physical location or components located at various physical locations. In an example in which the base station includes components located at various physical locations, the various components may each perform various functions so that the various components together implement functionality similar to that of a base station located at a single physical location. In this way, a base station may equivalently refer to an independent base station or a base station including components located at various physical locations or virtualized locations. In some specific implementations, a base station including components located at various physical locations may be referred to as a decomposed radio access network (RAN) architecture (such as an open RAN (O-RAN) or virtualized RAN (VRAN) architecture) or may be associated with the decomposed radio access network (RAN) architecture (such as an open RAN (O-RAN) or virtualized RAN (VRAN) architecture). In some specific implementations, such components of a base station may include or refer to one or more of a central unit (CU), a distributed unit (DU), or a radio unit (RU).

[0035] BS 102 communicates wirelessly with UE 104 via communication link 120. Each of BSs 102 can provide communication coverage for a corresponding geographic coverage area 110, which may overlap in some cases. For example, a small cell 102' (e.g., a low-power base station) can have a coverage area 110' that overlaps with the coverage area 110 of one or more macro cells (e.g., a high-power base station).

[0036] The communication link 120 between the BS 102 and the UE 104 may include uplink (UL) (also referred to as a reverse link) transmissions from the UE 104 to the BS 102 and / or downlink (DL) (also referred to as a forward link) transmissions from the BS 102 to the UE 104. In various aspects, the communication link 120 may employ multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity.

[0037] Examples of UE 104 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players, cameras, game consoles, tablet computers, smart devices, wearable devices, vehicles, electric meters, gas pumps, large or small kitchen appliances, health care equipment, implants, sensors / actuators, displays, or other similar devices. Some of the UEs 104 may be Internet of Things (IoT) devices (e.g., parking meters, gas pumps, ovens, vehicles, heart monitors, or other IoT devices), always-on (AON) devices, or edge processing devices. UE 104 may also be more generally referred to as stations, mobile stations, subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, mobile phones, user agents, mobile clients, or clients.

[0038] Communications using higher frequency bands may have higher path loss and shorter range than lower frequency communications. Therefore, some base stations (e.g. Figure 1 180) may utilize beamforming 182 with UE 104 to improve path loss and range. For example, base station 180 and UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays to facilitate beamforming.

[0039] In some cases, the base station 180 may send a beamformed signal in one or more transmit directions 182' to the UE 104. The UE 104 may receive the beamformed signal from the base station 180 in one or more receive directions 182". The UE 104 may also send a beamformed signal to the base station 180 in one or more transmit directions 182". The base station 180 may also receive a beamformed signal from the UE 104 in one or more receive directions 182'. The base station 180 and the UE 104 may then perform beam training to determine the best receive direction and transmit direction for each of the base station 180 and the UE 104. It is worth noting that the transmit direction and the receive direction of the base station 180 may be the same or may be different. Similarly, the transmit direction and the receive direction of the UE 104 may be the same or may be different.

[0040] The wireless communication network 100 includes a sidelink communication component 199 that can configure one or more aspects of sidelink communication between user equipments. The wireless communication network 100 also includes a sidelink communication component 198 that can be used to configure and perform one or more aspects of sidelink communication with other user equipments.

[0041] Figure 2 Aspects of an example BS 102 and UE 104 are depicted. In general, BS 102 includes various processors (e.g., 220, 230, 238, and 240), antennas 234a-234t (collectively 234), transceivers 232a-232t (collectively 232) including modulators and demodulators, and other aspects that enable wireless transmission of data (e.g., data source 212) and wireless reception of data (e.g., data sink 239). For example, BS 102 can transmit and receive data between itself and UE 104.

[0042] BS 102 includes a controller / processor 240 that can be configured to perform various functions related to wireless communication. In the depicted example, controller / processor 240 includes a processor that can represent Figure 1 The side link communication component 241 of the side link communication component 199 of the BS 102. It is worth noting that, although depicted as one aspect of the controller / processor 240, in other specific implementations, the side link communication component 241 may additionally or alternatively be implemented in various other aspects of the BS 102.

[0043] In general, the UE 104 includes various processors (e.g., 258, 264, 266, and 280), antennas 252a-252r (collectively referred to as 252), transceivers 254a-254r (collectively referred to as 254) including modulators and demodulators, and other aspects that enable wireless transmission of data (e.g., data source 262) and wireless reception of data (e.g., data sink 260).

[0044] UE 104 includes a controller / processor 280 that can be configured to perform various functions related to wireless communication. In the depicted example, the controller / processor 280 includes a processor that can represent Figure 1 The sidelink communication component 281 of the sidelink communication component 198 of the UE 104. It is worth noting that although depicted as one aspect of the controller / processor 280, in other specific implementations, the sidelink communication component 281 may additionally or alternatively be implemented in various other aspects of the UE 104.

[0045] Figure 3A , Figure 3B , Figure 3C and Figure 3D Describes a method for use in a wireless communication network such as Figure 1 In particular, Figure 3A is a diagram 300 illustrating an example of a first subframe within a 5G (e.g., 5G NR) frame structure, Figure 3B is a diagram 330 illustrating an example of a DL channel within a 5G subframe, Figure 3Cis a diagram 350 illustrating an example of a second subframe within a 5G frame structure, and Figure 3D FIG380 is a diagram illustrating an example of UL channels within a 5G subframe.

[0046] Later in this disclosure, Figure 1 , Figure 2 and Figure 3A , Figure 3B , Figure 3C and Figure 3D for further discussion.

[0047] Introduction to mmWave Wireless Communications

[0048] In wireless communications, the electromagnetic spectrum is often subdivided into various classes, bands, channels, or other characteristics. The subdivision is usually provided based on wavelength and frequency, where frequency may also be referred to as a carrier, subcarrier, channel, tone, or subband.

[0049] 5G networks may utilize several frequency ranges, which in some cases are defined by standards (such as 3GPP standards). For example, although 3GPP technical standard TS 38.101 currently defines frequency range 1 (FR1) as including 600 MHz-6 GHz, specific uplink and downlink allocations may fall outside of this general range. Therefore, FR1 is often referred to (interchangeably) as the "below 6 GHz" band.

[0050] Similarly, although TS 38.101 currently defines frequency range 2 (FR2) as including 26 GHz-41 GHz, again, specific uplink and downlink allocations may fall outside of this general range. FR2 is sometimes referred to (interchangeably) as the "millimeter wave" ("mmW" or "mmWave") band, although it is different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified by the International Telecommunication Union (ITU) as the "millimeter wave" band because the wavelengths at these frequencies are between 1 mm and 10 mm.

[0051] Communications using mmWave / near mmWave radio frequency bands (e.g., 3 GHz-300 GHz) may have higher path loss and shorter range than lower frequency communications. Figure 1 As described, a base station (e.g., 180) configured to communicate using mmWave / near-mmWave radio frequency bands can utilize beamforming (e.g., 182) with a UE (e.g., 104) to improve path loss and range.

[0052] Overview of Sidelink Communication

[0053] In some cases, two or more slave entities (e.g., UEs) may communicate with each other using sidelink signals. Real-world applications of such sidelink communications may include public safety, proximity services, UE-to-network relay, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh networks, and / or various other suitable applications. Generally speaking, a sidelink signal may refer to a signal communicated from one slave entity (e.g., UE1) to another slave entity (e.g., UE2) without the need for the communication to be relayed by a scheduling entity (e.g., UE or BS), even though the scheduling entity may be used for scheduling purposes and / or control purposes. In some examples, licensed spectrum may be used to communicate sidelink signals (unlike wireless local area networks (WLANs) that typically use unlicensed spectrum).

[0054] Figure 4 and Figure 5 A diagrammatic illustration of an example vehicle-to-everything (V2X) system according to some aspects of the present disclosure is shown. For example, Figure 4 and Figure 5 The illustrated vehicle may communicate via a sidelink channel and may perform sidelink CSI reporting as described herein.

[0055] Figure 4 and Figure 5 The V2X system provided in provides two complementary transmission modes. Figure 4 The first transmission mode illustrated by way of example in relates to direct communication (e.g., also referred to as sidelink communication) between parties that are adjacent to each other in a local area. Figure 5 The second transmission mode illustrated by way of example in FIG. 8 involves network communication through a network, which network communication may be implemented through a Uu interface (eg, a wireless communication interface between a radio access network (RAN) and a UE).

[0056] refer to Figure 4 , a V2X system 400 (e.g., including vehicle-to-vehicle (V2V) communications) is illustrated with two vehicles 402, 404. A first transmission mode allows direct communication between different parties in a given geographic location. As illustrated, the vehicles may have a wireless communication link 406 with an individual through a PC5 interface (i.e., vehicle to pedestrian (V2P), e.g., via a UE). Communications between vehicles 402 and 404 may also occur through a PC5 interface 408. In a similar manner, communications from vehicle 402 to other highway components (e.g., roadside service units 410), such as traffic signals or signs (i.e., vehicle to infrastructure (V2I)) may occur through a PC5 interface 412. For Figure 4For each communication link illustrated in , the elements can communicate bidirectionally, so each element can be a transmitter and receiver of information. The V2X system 400 can be a self-managed system implemented without the assistance of a network entity. The self-managed system can achieve improved spectrum efficiency, reduced costs, and increased reliability because no network service interruption occurs during handover operations for moving vehicles. The V2X system can be configured to operate in a licensed or unlicensed spectrum, so any vehicle with an equipped system can access common frequencies and share information. Such coordinated / shared spectrum operations allow safe and reliable operations.

[0057] Figure 5 A V2X system 500 is shown for communicating between a vehicle 502 and a vehicle 504 via a network entity 506. These network communications may occur via discrete nodes, such as base stations, (e.g., eNBs or gNBs), which transmit information to and receive information from vehicles 502, 504 (e.g., relay information between vehicles 502, 504). Network communications via vehicle-to-network (V2N) links 508 and 510 may be used, for example, for long-range communications between vehicles, such as for communicating that there is a traffic accident at a distance ahead along a road or highway. Other types of communications may be transmitted by the nodes to the vehicles, such as traffic flow conditions, road hazard warnings, environmental / weather reports, service station availability, etc. Such data may be obtained from a cloud-based sharing service.

[0058] In some cases, two or more subordinate entities (e.g., UEs) may communicate with each other using sidelink signals. As described above, V2V and V2X communications are examples of communications that may be sent via a sidelink. When a UE is sending a sidelink communication on a subchannel of a frequency band, the UE is typically unable to receive another communication in the frequency band (e.g., another sidelink communication from another UE). Other applications of sidelink communications may include public safety or service announcement communications, communications for proximity services, communications for UE to network relay, device-to-device (D2D) communications, Internet of Everything (IoE) communications, Internet of Things (IoT) communications, mission-critical mesh communications, and other suitable applications.

[0059] Figure 6An example sidelink slot structure 600 is depicted. In general, a sidelink may refer to a direct link between one slave entity (e.g., UE1) and another slave entity (e.g., UE2). Thus, a sidelink may be used to send and receive communications (also referred to herein as "sidelink signals") without relaying the communications through a scheduling entity (e.g., BS), even though the scheduling entity may be used for scheduling purposes or control purposes. In some examples, the sidelink signals may be communicated using a licensed spectrum (unlike wireless local area networks, which typically use an unlicensed spectrum).

[0060] Various sidelink channels may be used for sidelink communications, including a physical sidelink discovery channel (PSDCH) (not shown), a physical sidelink control channel (PSCCH) 602 (spanning 3 symbols in this example), a physical sidelink shared channel (PSSCH) 604, and a physical sidelink feedback channel (PSFCH) 608. The PSDCH may carry discovery expressions that enable neighboring devices to discover each other. The PSCCH 602 may carry control signaling, such as sidelink resource configuration and other parameters for data transmission, and the PSSCH 604 may carry data transmission.

[0061] For operation on PSSCH 604, the UE performs transmission or reception in a time slot on a carrier. Transmission resources are usually reserved or allocated for sidelink transmission on a subchannel of the frequency band for a time slot period. The NR sidelink can provide support for the UE for the case where all symbols in the time slot are available for the side link and the other case where only a subset of consecutive symbols in the time slot are available for the side link.

[0062] The gap symbol 606 corresponds to a time when no signal is assigned and may be used to suspend the transmission / reception of signals within the side link time slot structure 600.

[0063] The PSFCH 608 may carry feedback such as channel state information (CSI) related to the sidelink channel quality. A sequence-based PSFCH format with one symbol (excluding the AGC training period) may be supported. The following formats are also possible: a PSFCH format based on PUCCH format 2, and a PSFCH format that spans all symbols available for the sidelink in a slot.

[0064] Figure 7 How can the resources of the common resource pool 700 be allocated to the UE (eg, Figure 1 1 and 2. The common resource pool 700 includes time slots 710, 720, and 730 (also referred to as time slots 0, 1, and 2). As described above, reference Figure 4 and Figure 5, a side link generally refers to a link between two users, or a user relay can be used in different scenarios and different applications. As previously described, when a UE sends a side link communication on a subchannel of a frequency band, the UE is generally unable to receive another communication in the frequency band (e.g., another side link communication from another UE). Thus, the side link communication may be referred to as half-duplex. Therefore, UE 0, UE 1, and UE 5, which respectively send side link communications 712, 714, and 716, cannot receive side link communications from each other. That is, UE 0 cannot receive side link communications 714 and 716. Similarly, UE 2 cannot receive side link transmissions 724 and 732 from UE 3 and UE 4, respectively. In addition, UE 3 cannot receive side link transmission 722 from UE 2, and UE 4 cannot receive side link transmission 734 from UE 2. In various aspects of the present disclosure, for a UE or wireless node that cannot receive a side link transmission, the side link transmission that cannot be received may be referred to as "erasure" because the UE has no information about the side link transmission. This is different from other cases where the UE fails to decode a transmission because in those cases the UE may retain some information about the transmission that the UE failed to decode, and the UE may combine the retained information with retransmissions received by the UE to determine the transmission that the UE failed to decode.

[0065] According to previously known techniques, in NR sidelink communications, resource allocation is based on reservation. In these techniques, resource allocation is performed in units of subchannels in the frequency domain, and resource allocation is limited to one time slot in the time domain. In previously known techniques, transmission can reserve resources in the current time slot and up to two future time slots. The reservation information can be carried in the sidelink control information (SCI).

[0066] In some cases, sidelink control information (SCI) may be sent in two stages. The first stage SCI (SCI-1) may be sent on a physical sidelink control channel (PSCCH) and contains resource reservation information and information required to decode the second stage SCI (SCI-2). SCI-2 may be sent on a physical sidelink shared channel (PSSCH) and contains information required to decode data on a shared channel (SCH) and to provide feedback (e.g., an acknowledgment (ACK) or a negative acknowledgment (NAK)) on a physical sidelink feedback channel (PSFCH).

[0067] An example use case for sidelink communications involves communication between a controller, such as a programmable logic controller (PLC), and one or more wireless devices. The type of wireless device may vary based on the type of deployment. For example, in a factory automation deployment, the PLC may communicate with sensors / actuators (S / A). Figure 8In multimedia deployments (e.g., VR, AR, or XR) as exemplified in FIG, the PLC can communicate with wearables.

[0068] In the present disclosure, both the PLC and the wearable may be generally referred to as UE. In some cases, when the PLC is transmitting to the wearable, the PLC may be referred to as a transmitter UE, and the wearable may be referred to as a receiver UE. In some cases, when the PLC is receiving transmissions from the wearable, the PLC may be referred to as a receiver UE, and the wearable may be referred to as a transmitter UE. Therefore, the designation of transmitter UE and receiver UE depends on the specific operation or environment and is not bound to the device as a permanent or constant attribute.

[0069] Figure 8 The example deployment shown in involves a PLC and two wearables (wearable 1 and wearable 2). As shown, the PLC can communicate with the gNB (e.g., via a Uu interface) and can communicate with wearable 1 and wearable 2 via a sidelink (e.g., PC5) interface.

[0070] Aspects related to interference measurement and reporting in the sidelink

[0071] Various aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for interference measurement and reporting in deployments involving sidelink communications between user equipment (UEs). The mechanisms proposed herein can help mitigate the adverse effects of interference in various sidelink deployments involving applications that require reliable sidelink communications, such as VR, AR, and XR.

[0072] According to certain aspects, existing resources configured for sidelink communications may be used for IM purposes. As will be described in more detail below, configured PSSCH and / or DMRS resources may be reused for interference measurements via puncturing and / or rate matching. Puncturing or rate matching may be controlled to provide more or less resources for IM purposes, thereby providing flexibility to adapt to operating conditions or needs. Switching between puncturing and rate matching may also be controlled.

[0073] In some cases, dedicated resources may be provided for the sidelink IM. For example, in some cases, a sidelink channel state information IM (SL-CSI-IM resource) or a sidelink zero-power CSI reference signal (SL-ZP-CSI-RS) resource may be configured for SL IM purposes.

[0074] In some cases, some sidelink reference signal (SL-RS) resources may be reused for IM reporting, for example, by puncturing. The amount of SL-RS reused for IM purposes may also be controlled to adapt to changing conditions. For example, when the UE is experiencing a low-delay extended channel with frequency selective interference (e.g., SL-RS resources spanning an entire resource block may be punctured), more SL-RS resources may be punctured and used for IM purposes (rather than for SL-RS).

[0075] Fig. 9 The call flow diagram 900 of exemplifies an example of SL IM reporting between two UEs, wearable / UE1 902 and UE2 904. In such a scenario, from the wearable's perspective, UE2 may operate as a base station (eg, of a small cell).

[0076] In the illustrated example, at 906, the wearable sends a sidelink reference signal (SL-RS) and an interference report to UE2. The SL-RS may be similar to the sounding reference signal (SRS) transmitted by the UE on the Uu (cellular) link for the base station to measure uplink channel conditions.

[0077] In one aspect, the interference report includes a thermal and interference report. In another aspect, the interference report includes an interference-only report. The interference report includes one of an interference plus noise covariance matrix, an interference power, an interference rank, or an interference eigenvalue. The number of non-zero eigenvalues ​​may determine the transmission rank. The interference report is sent in the second level of a two-level SCI (e.g., SCI-2).

[0078] In some cases, the gap symbols (e.g., such as Figure 6 The gap symbols 606 shown) can be used by UEs sharing a common side link RP to estimate thermal noise (e.g., assuming that there is no interference from other UEs sharing the RP in these gaps). UEs sharing the RP can also use the gap symbols to estimate interference from UEs that do not share the RP. Based on switching between transmit circuitry (TX) and receive (RX) circuitry, the UE can use a portion of the gap symbols to perform the above measurements.

[0079] Although not shown, UE1 may have generated an interference report based on measurements made on resources configured for IM (e.g., CSI-IM) during a previous transmission from UE2 to the wearable. Alternatively or additionally, the interference report may be generated based on punctured resources (PSSCH / DMRS) from a previous transmission from UE2 to the wearable.

[0080] As illustrated, at 908, UE2 may perform channel state information (CSI) estimation, for example, based on the SL-RS sent from the wearable. UE2 may also use interference reports to improve CSI estimates, allowing UE2 to generate whitened channel estimates by reducing / removing the effects of (colored) interference. These channel estimates may be considered improved relative to non-whitened channel estimates and may help improve performance.

[0081] In some cases, the CSI estimate produces a channel quality indicator (CQI) value, a rank indicator (RI) value, and / or a precoding matrix indicator (PMI) value. In some cases, UE2 may transmit / report this information to the wearable at 910. In other cases, rather than reporting the CQI value, RI value, and / or PMI value to the wearable, UE2 may use this information to determine transmission parameters (precoder, PMI, RI, and / or modulation and coding scheme (MCS)) for subsequent transmissions from UE2 to the wearable.

[0082] Assuming reciprocity or even symmetric interference (e.g., meaning that the impact of the interference is substantially the same at both the TX side and the RX side), the UE2 may perform channel state feedback (CSF). For example, as described above, the UE2 may take into account interference reports (from the wearable) when performing CSI estimation. If this is the case, the reports (e.g., PMI / CQI / RI) transmitted from the UE to the wearable at 910 may be used to help the wearable determine transmit parameters for subsequent transmissions to the UE2. The wearable may use the information received (at 910) when performing CSI estimation (at 912) to determine transmit parameters (for subsequent transmissions at 914). At 914, the transmission may include subsequent interference reports and / or other feedback (e.g., included in a MAC-CE or PSFCH).

[0083] In some cases, if UE2 and the wearable experience the same interference properties (e.g., as indicated by a comparison of interference parameters generated at UE2 and interference parameters in a report received from the wearable), the UE may determine whether it is useful to transmit an interference report (generated by UE2) to the wearable. In some cases, UE2 may add a flag in the SCI-2 indicating whether to include an interference report generated by UE2 (or whether the wearable should use the interference report it transmits to UE2). If a report is received from UE2, the wearable may use this information to enhance the CSI estimate (at 912), for example, using whitening.

[0084] Although Fig. 9 The example shown in FIG. 1 relates to a UE (UE2) communicating with a wearable (UE1), but in some cases, a UE (e.g., a PLC) acting as a master UE may communicate with multiple wearables. Fig.10 As shown, UE2 1004 (acting as a PLC or master UE) can communicate with a first wearable (UE1 1002) and a second wearable (UE3 1006). In some cases, in addition to transmitting a UE-specific SL-RS, UE2 can also transmit a common sidelink reference signal SL-RS (which can span RP or can be a wideband RS) to other UEs. In some cases, UE2 can signal its interference parameters (e.g., reporting the interference plus noise covariance matrix, rank as described above). In these cases, UE1 and UE3 can calculate PMI / RI / CQI (as described above) based on the estimated channel and reported interference.

[0085] Rate matching generally refers to matching the amount of data sent to the amount of resources available for sending, which can be dynamic. Puncturing refers to a form of rate matching. In puncturing, some decoded output bits are not sent to satisfy the rate matching output size. Puncturing can be thought of as a way of selecting the location (time / frequency resources) of the signal that is not sent.

[0086] According to certain aspects, existing resources configured for sidelink communications may be used for IM purposes. As will be described in more detail below, configured PSSCH and / or DMRS resources may be reused for interference measurements via puncturing and / or rate matching. Puncturing or rate matching may be controlled to provide more or less resources for IM purposes, thereby providing flexibility to adapt to operating conditions or needs. Switching between puncturing and rate matching may also be controlled.

[0087] As described above, in some cases, the configured side link resources may be punctured for IM purposes. For example, SL-RS resources may be punctured and used for IM purposes. Fig.11 Resource elements (REs) of the PSSCH 1102 and / or DMRS 1104 illustrated in the figure may be punctured and used for IM purposes. As described above, the amount of resources (e.g., SL-RS, PSSCH, and / or DMRS) reused for IM purposes may also be controlled to adapt to changing conditions or performance goals. In some cases, different puncturing patterns may be used to change the location and / or amount of punctured resources. For example, one or more patterns may indicate a relatively dense set of resources to be punctured, while one or more other patterns may indicate a relatively sparse set of resources to be punctured.

[0088] For example, for SL-RS, DMRS and / or PSSCH, there are various options (e.g., puncturing patterns) for indicating how to perform puncturing. In some cases, the transmitting UE may puncture resources for DMRS / PSSCH transmission based on one or more configured puncturing patterns.

[0089] In some cases, the UE may be configured (e.g., via PC5-RRC or MAC-CE) with a configuration for DMRS or PSSCH puncturing. In some cases, the configuration may apply across all resource pools (RPs). In some cases, a puncturing pattern may be defined for DMRS or PSSCH per RP (e.g., different RPs may have different puncturing patterns). In some cases, per-RP puncturing may be configured via Uu RRC signaling.

[0090] In some cases, multiple puncturing patterns may be defined for DMRS or for PSSCH, and the TX-UE may select one of these patterns. In some cases, the selection may be based on a suggestion from the RX-UE, transmitted on the PSFCH or MAC-CE, or piggybacked on the PSSCH. The suggestion may be indicated, for example, by providing an index (e.g., a 4-bit index for selecting one of the 16 patterns), and may be considered a suggestion because the TX-UE may make the final selection. In these cases, the TX-UE may indicate the actual selected mode to the RX-UE, for example, using PC5-RRC / MAC-CE or SCI-2 or piggybacking on the PSSCH.

[0091] There are various options for puncturing the sidelink resources. For example, according to one option, some DMRS REs or RE sets of resources per RB may be punctured, or the entire RB may be punctured using a specific defined bitmap or comb level per RB (e.g., where the comb indicates a specific subcarrier).

[0092] According to the second option, the resources for PSSCH may be punctured based on a specific comb level and comb offset (or a specific pattern). In these cases, there are various alternatives for PSSCH resource allocation. According to the first alternative, the TX-UE may rate match the PSSCH around the punctured resources. This situation may be similar to how ZP-CSI-RS resources may be used in downlink physical downlink shared channel (DL / PDSCH) transmissions. In some cases, multiple resources may be associated with the PSSCH and may be configured as described above. According to the second alternative, the TX-UE may puncture the PSSCH at the configured resources (e.g., as if those resources were lost / erased).

[0093] There are also various options for indicating whether the transmission is being transmitted with puncturing, but rate matching is enabled or not enabled (e.g., no rate matching, removing resources and associated bits). According to a first option, when the RX-UE receives the PSSCH, the SCI may include an indicator (e.g., a flag) indicating whether the scheduled channel is punctured. A first value of the indicator may indicate that puncturing is enabled, and the RX-UE may assume that the PSSCH has been punctured. A second value of the indicator may indicate that puncturing is disabled, and the RX-UE may assume that the PSSCH has not been punctured.

[0094] According to a second option, the TX-UE may use certain Radio Network Temporary Identifiers (RNTIs) for SCI (e.g., for SCI-2) or for certain SCI formats to indicate whether puncturing is applied to PSSCH / DMRS scheduled by those SCIs. According to a third option, the gNB (e.g., in reference Figure 5 1) configures rules for TX-UE and RX-UE to determine how to perform puncturing. These rules may involve a new configured RNTI, a specific DCI format, a search space, and / or a control resource set (CORESET) associated with the DCI to indicate puncturing. In these cases, puncturing may be applied to PSSCH via DCI (e.g., semi-persistent scheduling (SPS) activation DCI in SL (e.g., configured grant type 2)).

[0095] In some cases, puncturing may be enabled only for DMRS, only for PSSCH, or for both DMRS and PSSCH. In some cases, this enabling may be per RP, such that different RPs may have different types of enabled (or not enabled) puncturing. In some cases, if puncturing is enabled, the TX-UE may decide to use it or may include an indication of the decision (e.g., in SCI-2). In some cases, if both DMRS puncturing and PSSCH puncturing are enabled, the UE may decide whether to use one (or both) of them, e.g., based on some feedback from the RX-UE, based on some CSI estimates and / or TB size.

[0096] In some cases, for rate matching, SL-ZP-CSI-RS resources can be added to the PSSCH configured per resource pool. As mentioned above, SL-ZP-CSI-RS resources can be used for IM measurements. In these cases, this feature can be enabled or disabled per resource pool.

[0097] The above-mentioned techniques and options for configuring, enabling and indicating PSSCH and / or DMRS can also be applied to SL-RS puncturing. In some cases, similar to PSSCH / DMRS puncturing, different patterns for SL-RS puncturing can be used. For example, this may be useful when high-density CSI-RS is used for SL-RS. In some cases, the SL-RS puncturing pattern can be a specific comb level and comb offset for each RE. In some cases, the comb level can be applied at the RB level. In these cases, for example, every other RB of the SL-RS can be punctured, and interference can be measured across different RBs.

[0098] As described above, in some cases, dedicated sidelink resources may be provided for SL IM purposes. Such resources may be referred to as sidelink channel state information interference measurement (SL-CSI-IM) resources.

[0099] In some cases, each SL resource pool may be configured with one or more SL-CSI-IM resources. In some cases, the gNB may configure the same set of resources across all RPs. In some cases, the resource pool may be configured with multiple CSI-IM modes. In these cases, the TX-UE may select one or more of the modes in SCI-2. For example, the selection may be based on CSI, interference level measurement, transport block size (TBS), and / or whether there is a corresponding need to use all resources for data or channel estimation.

[0100] In some cases, the gNB may selectively associate (e.g., switch) a CSI-RS (SL-RS) resource with a CSI-IM resource. In these cases, when the CSI-RS and CSI-IM resources are associated, a single trigger (ID) for the TX-UE may trigger both resources. In some cases, there may be a defined reporting ID for the SL. In these cases, the RX-UE may use both the SL-RS and the SL-CSI-IM to measure the CSI and also generate interference reports.

[0101] There are various options on how to send the interference report. For example, the interference report can be sent via PSFCH, MAC-CE, or sent together with PSSCH (piggybacked on PSSCH). In terms of reporting triggers, in some cases, if the reporting configuration (with ID) has a reporting amount (flag) set to ON (indicating that interference reports are included), the UE may transmit an interference report. As mentioned above, Fig. 9 As described, interference reporting may be signaled in SCI-2 while also triggering SL-RS (and / or SL-CSI-IM) resources at another UE.

[0102] The UE may use the received interference report for various purposes. For example, the UE may use the received interference report and their own interference measurements to determine whether the interference is symmetric or at least has the same characteristics or similar characteristics. Based on this determination, the UE may decide whether it should transmit its own interference report (e.g., if the interference is determined to be symmetric, signaling overhead may be saved by not transmitting an additional interference report).

[0103] In some cases, using various signaling (e.g., PC-5 RRC / MAC-CE signaling), the UE may decide whether to include interference reporting. In other cases, the gNB may enable interference reporting, for example, using RRC / MAC-CE or DCI signaling to the UE.

[0104] As shown at 1210, Fig.12 In the example, a UE (e.g., wearable UE1) may use SCI-2 to indicate to another UE (UE2) whether it requests the other UE to transmit an interference report. As illustrated, the indication may be included with the SCI-2, while transmitting the SL-RS and indicating whether to puncture / use CSI-IM). As illustrated at 1220, UE2 may also use a flag to indicate whether the SCI-2 it transmits includes an interference report. For example, UE2 may determine that the interference is symmetric, and based on this determination, may decide not to transmit an interference report.

[0105] As described herein, aspects of the present disclosure provide mechanisms that allow a UE to estimate sidelink interference parameters for IM and sidelink IM reporting purposes, which can help improve channel estimation and thus improve overall system performance. The mechanisms described herein can allow the amount of IM resources to be adapted based on changing conditions.

[0106] Example Method

[0107] Fig.13 An example of a method 1300 for wireless communication according to aspects of the present disclosure is shown. In some aspects, a user equipment (such as Figure 1 and Figure 2 UE 104) or Fig.15 The processing system 1505 can execute the method 1300.

[0108] Method 1300 begins at step 1305 by receiving signaling indicating resources in a sidelink resource pool that are configured for sidelink interference measurement. In some cases, the operation of this step refers to the following steps. Fig.15 The resource configuration circuit described may be obtained by referring to Fig.15 The described resource configuration circuit is implemented.

[0109] Then, the method 1300 proceeds to step 1310, sending a first interference report including interference measurement information corresponding to the indicated resource to at least the second UE. In some cases, the operation of this step refers to as described in reference Fig.15 The reference measurement circuit described may be used as reference Fig.15 The described reference measurement circuit is performed.

[0110] In some aspects, the first interference report indicates at least one of an interference plus noise covariance matrix, an interference power, an interference rank, or an interference eigenvalue. In some aspects, the first interference report is sent in a second stage of a two-stage SCI.

[0111] In some aspects, the method 1300 also includes receiving, from the second UE, an SCI including information generated by the second UE based on the first interference report. In some aspects, the method 1300 also includes determining a transmit parameter using at least one of the information received with the SCI or the SL-RS. In some aspects, the method 1300 also includes sending a sidelink transmission to the second UE using the determined transmit parameter.

[0112] In some aspects, the information included in the SCI includes at least one of a second interference report generated by the second UE or an indication that the first interference report is suitable for use by the first UE to determine the transmission parameters.

[0113] In some aspects, the first UE is a primary UE, and the first UE sends a first interference report to a third UE.

[0114] In some aspects, the signaling indicates a puncturing pattern for puncturing resources of at least one of PSSCH resources, DMRS, or SL-RS. In some aspects, the puncturing pattern is indicated in a sidelink RRC signaling configuration or a MAC CE signaling configuration, and wherein the puncturing pattern is applied to multiple sidelink resource pools. In some aspects, different puncturing patterns are defined for different sidelink resource pools. In some aspects, the puncturing pattern includes a puncturing pattern selected from a plurality of configured puncturing patterns. In some aspects, the puncturing pattern is selected based on a suggestion of the first UE. In some aspects, the puncturing pattern indicates resources to be punctured within: one or more DMRS REs within an RB or one or more DMRS RE sets within an RB. In some aspects, the puncturing pattern indicates the PSSCH resources to be punctured based on at least one of a comb level or a comb offset.

[0115] In some aspects, method 1300 also includes determining whether to apply the puncturing pattern to the scheduled PSSCH. In some aspects, the determination is based on at least one of an RNTI value, an SCI content, an SCI format, or a rule. In some aspects, method 1300 also includes determining whether the puncturing pattern is applied only to DMRS, only to PSSCH, or to both DMRS and PSSCH. In some aspects, the puncturing pattern indicates a pattern of SL-RS resources to be punctured associated with a comb of REs within an RB or a specific RE within an RB. In some aspects, the puncturing pattern also indicates the RB in which the puncturing pattern is to be applied.

[0116] In some aspects, the resources indicated by the signaling include SL-CSI-IM resources. In some aspects, the signaling indicates one or more SL-CSI-IM resources configured according to the side link resource pool. In some aspects, the same set of SL-CSI-IM resources is configured across multiple side link resource pools. In some aspects, at least one side link resource pool is configured with multiple SL-CSI-IM modes. In some aspects, the first UE receives an indication of one or more of the multiple SL-CSI-IM modes via the SCI.

[0117] In some aspects, the method 1300 also includes receiving signaling from a network entity indicating that the first UE will use SL-RS, SL-CSI-IM, or both SL-RS and SL-CSI-IM for interference measurement based on the first interference report. In some aspects, the first interference report is sent in at least one of a PSFCH, a MAC CE, or a physical sidelink shared channel.

[0118] In some aspects, the method 1300 further includes: receiving a second interference report from the second UE. In some aspects, the method 1300 further includes determining whether the interference determined at the first UE and the interference determined at the second UE have the same characteristics or similar characteristics based on the first interference report and the second interference report. In some aspects, the resources indicated by the signaling include SL-ZP-CSI-RS.

[0119] In some aspects, the method 1300 further includes, prior to sending the first interference report, receiving signaling indicating whether the first UE is to send the first interference report.

[0120] In some aspects, the method 1300 also includes sending, to the second UE, an SCI including an indication of whether the second UE is to send, to the first UE, a second interference report generated by the second UE.

[0121] Fig.14 An example of a method 1400 for wireless communication according to aspects of the present disclosure is shown. In some aspects, a user equipment (such as Figure 1 and Figure 2 UE 104) or Fig.16 The processing system 1605 can execute the method 1400.

[0122] Method 1400 begins at step 1405, receiving a first interference report from a second UE, the first interference report including interference measurement information corresponding to resources in a sidelink resource pool configured for sidelink interference measurement. In some cases, the operation of this step refers to as described in reference Fig.16 The reference reporting circuit described herein may be used by reference to Fig.16 The described reference reports the circuit execution.

[0123] Then, the method 1400 proceeds to step 1410, performing channel estimation on the sidelink channel between the first UE and the second UE based on the interference measurement information. In some cases, the operation of this step refers to the following Fig.16 The channel estimation circuit described may also be implemented as shown in FIG. Fig.16 The described channel estimation circuit performs.

[0124] In some aspects, the first interference report indicates at least one of an interference plus noise covariance matrix, an interference power, an interference rank, or an interference eigenvalue. In some aspects, the first interference report is received in a second stage of a two-stage SCI.

[0125] In some aspects, the method 1400 also includes sending an SCI to the first UE, the SCI including at least one of information generated by the second UE based on the first interference report or a second interference report generated by the second UE.

[0126] In some aspects, the information included in the SCI includes at least one of a second interference report generated by the second UE or an indication that the first interference report is suitable for use by the first UE to determine the transmission parameters.

[0127] In some aspects, the method 1400 further includes receiving an indication from the first UE to send a second interference report to the second UE. In some aspects, the method 1400 further includes including the second interference report in the SCI based on the indication.

[0128] In some aspects, the method 1400 further includes: determining that the first interference report is suitable for the first UE to determine the transmission parameter by comparing the interference parameters included in the first interference report with the interference parameters generated at the second UE. In some aspects, the method 1400 further includes including in the SCI an indication that the first interference report is suitable for the first UE to determine the transmission parameter based on the comparison.

[0129] Example Wireless Communication Device

[0130] Fig.15Depicted are devices including those operable to, configured to, or adapted to perform operations for the techniques disclosed herein (such as for Fig. 9 , Fig.12 and Fig.13 In some examples, the communication device 1500 may be, for example, a device for Figure 1 and Figure 2 UE 104 is described.

[0131] The communication device 1500 includes a processing system 1505 coupled to a transceiver 1575 (e.g., a transmitter and / or a receiver). The transceiver 1575 is configured to send (or transmit) and receive signals for the communication device 1500 via an antenna 1580, such as various signals as described herein. The transceiver 1575 can communicate bidirectionally via an antenna 1580, a wired link, or a wireless link as described herein. For example, the transceiver 1575 may represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1575 may also include or be connected to a modem to modulate packets and provide the modulated packets for transmission, as well as demodulate received packets. In some examples, the transceiver 1575 may be tuned to operate at a specified frequency. For example, the modem may configure the transceiver 1575 to operate at a specified frequency and power level based on the communication protocol used by the modem.

[0132] Processing system 1505 may be configured to perform processing functions for communication device 1500, including processing signals received by and / or to be transmitted by communication device 1500. Processing system 1505 includes one or more processors 1510 coupled to computer readable media / memory 1540 via bus 1570.

[0133] In some examples, one or more processors 1510 may include one or more intelligent hardware devices (e.g., general processing components, digital signal processors (DSPs), central processing units (CPUs), graphics processing units (GPUs), microcontrollers, application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, one or more processors 1510 are configured to operate a memory array using a memory controller. In other cases, the memory controller is integrated into one or more processors 1510. In some cases, one or more processors 1510 are configured to execute computer-readable instructions stored in a memory to perform various functions. In some aspects, one or more processors 1510 include dedicated components for modem processing, baseband processing, digital signal processing, or transmission processing.

[0134] In some aspects, the computer-readable medium / memory 1540 is configured to store instructions (eg, computer-executable code) that, when executed by the one or more processors 1510, cause the one or more processors 1510 to perform Fig. 9 , Fig.12 and Fig.13 The operations illustrated may be other operations for performing the various techniques discussed herein.

[0135] In one aspect, computer readable medium / memory 1540 includes resource configuration code 1545 , interference measurement code 1550 , SCI code 1555 , transmit parameter code 1560 , and sidelink transmit code 1565 .

[0136] Examples of computer readable media / memory 1540 include random access memory (RAM), read-only memory (ROM), solid-state memory, hard disk drive, hard disk drive, etc. In some examples, computer readable media / memory 1540 is used to store computer readable, computer executable software including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, among other things, the memory includes a basic input / output system (BIOS) that controls basic hardware or software operations, such as interactions with peripheral components or devices. In some cases, a memory controller operates a memory cell. For example, a memory controller may include a row decoder, a column decoder, or both. In some cases, a memory cell within a memory stores information in the form of a logical state.

[0137] The various components of the communication device 1500 may provide for performing the methods described herein (including Fig. 9 , Fig.12 and Fig.13 Components of the method described herein.

[0138] In some examples, means for sending or transmitting (or means for outputting for sending) may include Figure 2 The transceiver 254 and / or antenna 252 and / or Fig.15 The transceiver 1575 and antenna 1580 of the communication device in.

[0139] In some examples, the means for receiving (or the means for obtaining) may include Figure 2 The transceiver 254 and / or antenna 252 and / or Fig.15 The transceiver 1575 and antenna 1580 of the communication device in.

[0140] In some examples, the means for receiving and sending may include various processing system 1505 components, such as: Fig.15 One or more processors 1510, or Figure 2 104, including a receive processor 258, a transmit processor 264, a TX MIMO processor 266, and / or a controller / processor 280 (including a sidelink communications component 281).

[0141] In one aspect, one or more processors 1510 include resource configuration circuitry 1515 , interference measurement circuitry 1520 , SCI circuitry 1525 , transmit parameter circuitry 1530 , and sidelink transmit circuitry 1535 .

[0142] According to some aspects, the resource configuration circuit 1515 receives signaling indicating resources configured for sidelink interference measurement within a sidelink resource pool. In some aspects, the signaling indicates a puncturing pattern for puncturing resources of at least one of a PSSCH resource, a DMRS, or a SL-RS. In some aspects, the puncturing pattern is indicated in a sidelink RRC signaling configuration or a MAC CE signaling configuration, and wherein the puncturing pattern is applied to multiple sidelink resource pools. In some aspects, different puncturing patterns are defined for different sidelink resource pools. In some aspects, the puncturing pattern includes a puncturing pattern selected from a set of configured puncturing patterns. In some aspects, the puncturing pattern is selected based on a suggestion of a first UE. In some aspects, the puncturing pattern indicates resources to be punctured within the following items: one or more DMRS REs within an RB or one or more DMRS RE sets within an RB. In some aspects, the puncturing pattern indicates the PSSCH resources to be punctured based on at least one of a comb level or a comb offset.

[0143] In some examples, the resource configuration circuit 1515 determines whether the puncturing pattern applies the puncturing pattern to the scheduled PSSCH. In some aspects, the determination is based on at least one of the RNTI value, the SCI content, the SCI format, or the rule. In some examples, the resource configuration circuit 1515 determines whether the puncturing pattern is applied only to DMRS, only to PSSCH, or to both DMRS and PSSCH. In some aspects, the puncturing pattern indicates the pattern of the SL-RS resources to be punctured associated with the comb teeth of the RE within the RB or the specific RE within the RB. In some aspects, the puncturing pattern also indicates the RB to which the puncturing pattern is to be applied. In some aspects, the resources indicated by the signaling include SL-CSI-IM resources. In some aspects, the signaling indicates one or more SL-CSI-IM resources configured according to the side link resource pool. In some aspects, the same SL-CSI-IM resource set is configured across multiple side link resource pools. In some aspects, at least one side link resource pool is configured with multiple SL-CSI-IM patterns. In some aspects, the first UE receives an indication of one or more of a plurality of SL-CSI-IM patterns via the SCI. In some examples, the resource configuration circuit 1515 receives signaling from a network entity indicating that the first UE will use SL-RS, SL-CSI-IM, or both SL-RS and SL-CSI-IM for interference measurement based on the first interference report. In some aspects, the resources indicated by the signaling include SL-ZP-CSI-RS.

[0144] According to some aspects, the interference measurement circuit 1520 sends a first interference report to at least a second UE, the first interference report being based on interference measurements performed on the indicated resources. In some aspects, the first interference report indicates at least one of an interference plus noise covariance matrix, an interference power, an interference rank, or an interference eigenvalue. In some aspects, the first interference report is sent in the second stage of a two-stage SCI. In some aspects, the first UE is a master UE, and the first UE sends the first interference report to the third UE. In some aspects, the first interference report is sent in at least one of a PSFCH, a MAC CE, or a physical sidelink shared channel.

[0145] In some examples, the interference measurement circuit 1520 receives a second interference report from the second UE. In some examples, the interference measurement circuit 1520 determines whether the interference determined at the first UE and the interference determined at the second UE have the same characteristics or similar characteristics based on the first interference report and the second interference report. In some examples, the interference measurement circuit 1520 receives signaling indicating whether the first UE is to send the first interference report before sending the first interference report.

[0146] According to some aspects, the SCI circuit 1525 receives from the second UE an SCI including information generated by the second UE based on the first interference report. In some aspects, the information included in the SCI includes at least one of a second interference report generated by the second UE or an indication that the first interference report is suitable for the first UE to determine a transmission parameter. In some examples, the SCI circuit 1525 sends the SCI to the second UE, the SCI including an indication of whether the second UE is to send the second interference report generated by the second UE to the first UE.

[0147] In accordance with some aspects, transmit parameter circuit 1530 determines transmit parameters using at least one of information received with the SCI or the SL-RS.

[0148] In accordance with some aspects, sidelink transmit circuitry 1535 transmits a sidelink transmission to the second UE using the determined transmit parameters.

[0149] It is worth noting that Fig.15 This is just one example, and many other examples and configurations of communication devices are possible.

[0150] Fig.16 Depicted are devices including those operable to, configured to, or adapted to perform operations for the techniques disclosed herein (such as for Fig. 9 , Fig.12 and Fig.14 In some examples, the communication device may be, for example, a communication device 1600 for Figure 1 and Figure 2 UE 104 is described.

[0151] The communication device 1600 includes a processing system 1605 coupled to a transceiver 1655 (e.g., a transmitter and / or a receiver). The transceiver 1655 is configured to send (or transmit) and receive signals for the communication device 1600 via an antenna 1660, such as various signals as described herein. The transceiver 1655 can communicate bidirectionally via an antenna 1660, a wired link, or a wireless link as described herein. For example, the transceiver 1655 may represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1655 may also include or be connected to a modem to modulate packets and provide the modulated packets for transmission, as well as demodulate received packets. In some examples, the transceiver 1655 may be tuned to operate at a specified frequency. For example, the modem may configure the transceiver 1655 to operate at a specified frequency and power level based on the communication protocol used by the modem.

[0152] The processing system 1605 may be configured to perform processing functions for the communication device 1600, including processing signals received by and / or to be transmitted by the communication device 1600. The processing system 1605 includes one or more processors 1610 coupled to a computer-readable medium / memory 1630 via a bus 1650.

[0153] In some examples, one or more processors 1610 may include one or more intelligent hardware devices (e.g., general processing components, DSPs, CPUs, GPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, one or more processors 1610 are configured to operate a memory array using a memory controller. In other cases, the memory controller is integrated into one or more processors 1610. In some cases, one or more processors 1610 are configured to execute computer-readable instructions stored in a memory to perform various functions. In some aspects, one or more processors 1610 include dedicated components for modem processing, baseband processing, digital signal processing, or transmission processing.

[0154] In some aspects, the computer-readable medium / memory 1630 is configured to store instructions (eg, computer-executable code) that, when executed by the one or more processors 1610, cause the one or more processors 1610 to perform Fig. 9 , Fig.12 and Fig.14 The operations illustrated in or other operations for performing the various techniques discussed herein.

[0155] In one aspect, computer readable medium / memory 1630 includes interference reporting code 1635 , channel estimation code 1640 , and SCI transmission code 1645 .

[0156] Examples of computer readable media / memory 1630 include RAM, ROM, solid-state memory, hard disk drive, hard disk drive, etc. In some examples, computer readable media / memory 1630 is used to store computer readable, computer executable software including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory includes BIOS, etc., which controls basic hardware or software operations, such as interactions with peripheral components or devices. In some cases, a memory controller operates a memory cell. For example, a memory controller may include a row decoder, a column decoder, or both. In some cases, a memory cell within a memory stores information in the form of a logical state.

[0157] The various components of the communication device 1600 may be provided for performing the methods described herein (including Fig. 9 , Fig.12 and Fig.14 Components of the method described herein.

[0158] In some examples, means for sending or transmitting (or means for outputting for sending) may include Figure 2 The transceiver 254 and / or antenna 252 and / or Fig.16 The transceiver 1655 and antenna 1660 of the communication device in.

[0159] In some examples, the means for receiving (or the means for obtaining) may include Figure 2 The transceiver 254 and / or antenna 252 and / or Fig.16 The transceiver 1655 and antenna 1660 of the communication device in.

[0160] In some examples, means for receiving and using may include various processing system 1605 components, such as: Fig.16 One or more processors 1610, or Figure 2 1. Aspects of the UE 104 depicted in FIG. 1 include a receive processor 258, a transmit processor 264, a TX MIMO processor 266, and / or a controller / processor 280 (including a sidelink communications component 281).

[0161] In one aspect, the one or more processors 1610 include interference reporting circuitry 1615 , channel estimation circuitry 1620 , and SCI transmission circuitry 1625 .

[0162] According to some aspects, the interference reporting circuit 1615 receives a first interference report from the first UE, and the first interference report is based on the interference measurement performed by the first UE on the resources configured for the side link interference measurement in the side link resource pool. In some aspects, the first interference report indicates at least one of the interference plus noise covariance matrix, the interference power, the interference rank, or the interference eigenvalue. In some aspects, the first interference report is received in the second stage of the two-stage SCI. In some examples, the interference reporting circuit 1615 receives an indication of sending a second interference report to the second UE from the first UE. In some examples, the interference reporting circuit 1615 includes the second interference report in the SCI based on the indication.

[0163] In accordance with some aspects, channel estimation circuit 1620 uses information in the first interference report to perform channel estimation of a sidelink channel between the first UE and the second UE.

[0164] According to some aspects, the SCI transmission circuit 1625 transmits an SCI to the first UE, the SCI including at least one of information generated by the second UE based on the first interference report or a second interference report generated by the second UE. In some aspects, the information included in the SCI includes at least one of the second interference report generated by the second UE or an indication that the first interference report is suitable for the first UE to determine a transmission parameter.

[0165] In some examples, the interference reporting circuit 1615 determines that the first interference report is suitable for the first UE to determine the transmission parameters by comparing the interference parameters included in the first interference report with the interference parameters generated at the second UE. In some examples, the SCI transmission circuit 1625 includes an indication in the SCI that the first interference report is suitable for the first UE to determine the transmission parameters based on the comparison.

[0166] It is worth noting that Fig.16 This is just one example, and many other examples and configurations of communication devices are possible.

[0167] Sample Clauses

[0168] Specific implementation examples are described in the following numbered clauses:

[0169] Clause 1: A method of wireless communication by a first user equipment, the method comprising: receiving signaling indicating resources within a sidelink resource pool that are configured for sidelink interference measurement; and sending a first interference report to a second UE including interference measurement information corresponding to the indicated resources.

[0170] Clause 2: A method as described in clause 1, wherein the interference measurement information indicates at least one of the following items: an interference plus noise covariance matrix; an interference power; an interference rank; or an interference eigenvalue.

[0171] Clause 3: A method as set forth in any one of clauses 1 and 2, wherein the first interference report is sent in a second stage of a two-stage SCI.

[0172] Clause 4: According to the method described in any one of clauses 1 to 3, the method also includes: receiving sidelink control information (SCI) including information based on the first interference report from the second UE; determining transmission parameters based on the information based on the first interference report or at least one of the sidelink reference signals (SL-RS) associated with the SCI; and sending a sidelink transmission to the second UE using the determined transmission parameters.

[0173] Clause 5: A method according to clause 4, wherein the information based on the first interference report includes at least one of the following items: a second interference report; or an indication of the first interference report that is suitable for the first UE to determine the transmission parameter.

[0174] Clause 6: A method as set forth in any of clauses 1 to 5, wherein the first UE is a primary UE; and the processor is configured to send the first interference report to a third UE.

[0175] Clause 7: A method according to any one of clauses 1 to 6, wherein the signaling indicates a puncturing pattern for puncturing resources of at least one of a physical sidelink shared channel (PSSCH), a demodulation reference signal (DMRS) or a sidelink reference signal (SL-RS).

[0176] Clause 8: A method according to clause 7, wherein the puncturing pattern is indicated in a sidelink radio resource control (RRC) signaling configuration or a medium access control (MAC) control element (CE) signaling configuration, and wherein the puncturing pattern is applied to multiple sidelink resource pools.

[0177] Clause 9: The method of clause 7, wherein a plurality of puncturing patterns are defined for different sidelink resource pools, wherein the plurality of puncturing patterns includes the puncturing pattern.

[0178] Clause 10: The method of clause 7, wherein the puncture pattern is a specific puncture pattern among a plurality of configured puncture patterns.

[0179] Clause 11: A method according to clause 10, wherein signaling indicating one of the multiple configured puncture patterns is sent to the second UE; and signaling confirming selection of the indicated one of the multiple configured puncture patterns for puncturing resources of at least one of the PSSCH, the DMRS or the SL-RS is received from the second UE.

[0180] Clause 12: A method as described in clause 7, wherein the puncturing pattern indicates resources to be punctured within: one or more DMRS resource elements (REs) within a resource block (RB); or one or more DMRS RE sets within a RB.

[0181] Clause 13: The method of clause 7, wherein the puncturing pattern indicates PSSCH resources to be punctured based on at least one of a comb level or a comb offset.

[0182] Clause 14: The method of clause 7, further comprising: determining whether the puncturing pattern is applied to a scheduled PSSCH; determining whether the puncturing pattern is applied to a scheduled PSSCH.

[0183] Clause 15: The method of clause 14, wherein the determining is based on at least one of an RNTI value, an SCI content, an SCI format, or a rule.

[0184] Clause 16: The method according to clause 14 further comprises: determining whether the puncturing pattern is applied to the scheduled PSSCH based on at least one of a radio network temporary identifier (RNTI) value, a sidelink control information (SCI) content, an SCI format or a rule.

[0185] Clause 17: A method according to clause 7, wherein the puncturing pattern indicates a pattern of SL-RS resources to be punctured, the pattern being associated with: a comb of resource elements (REs) within a resource block (RB); or a specific RE within the RB.

[0186] Clause 18: The method of clause 17, wherein the puncturing pattern further indicates RBs to which the puncturing pattern is to be applied.

[0187] Clause 19: A method according to any one of clauses 1 to 18, wherein the resources indicated by the signaling include sidelink channel state information interference measurement (SL-CSI-IM) resources; and the signaling indicates one or more SL-CSI-IM resources configured according to a sidelink resource pool.

[0188] Clause 20: The method of clause 19, wherein the same set of SL-CSI-IM resources is configured across multiple sidelink resource pools.

[0189] Clause 21: A method according to clause 19, wherein at least one side link resource pool is configured with multiple SL-CSI-IM modes, and the first UE receives an indication of one or more of the multiple SL-CSI-IM modes via the SCI.

[0190] Clause 22: The method according to Clause 19 further comprises: receiving signaling from a network entity, the signaling indicating whether the first UE will use SL-RS, SL-CSI-IM, or both SL-RS and SL-CSI-IM for the interference measurement on which the first interference report is based.

[0191] Clause 23: A method as described in any of clauses 1 to 22, wherein the first interference report is sent in at least one of a PSFCH, a MAC CE or a physical sidelink shared channel.

[0192] Clause 24: According to the method described in any one of clauses 1 to 23, the method also includes: receiving a second interference report from the second UE; and determining whether the interference determined at the first UE and the interference determined at the second UE have similar characteristics or different characteristics based on the first interference report and the second interference report.

[0193] Clause 25: A method as described in any of clauses 1 to 24, wherein the resources indicated by the signaling include sidelink zero power channel state information reference signal (SL-ZP-CSI-RS).

[0194] Clause 26: A method as described in any of clauses 1 to 25, the method further comprising: before sending the first interference report, receiving signaling indicating whether the first UE is to send the first interference report.

[0195] Clause 27: According to the method described in any one of clauses 1 to 26, the method also includes: sending sidelink control information (SCI) to the second UE, and the sidelink control information (SCI) includes an indication of whether the second UE is to send a second interference report generated by the second UE to the first UE.

[0196] Clause 28: A method for wireless communication by a first user equipment, the method comprising: receiving a first interference report from a second UE, the first interference report comprising interference measurement information corresponding to resources within a sidelink resource pool that are configured for sidelink interference measurement; and performing channel estimation on a sidelink channel between the first UE and the second UE based on the interference measurement information.

[0197] Clause 29: A method as described in clause 28, wherein the interference measurement information indicates at least one of the following: an interference plus noise covariance matrix; an interference power; an interference rank; or an interference eigenvalue.

[0198] Clause 30: A method as set forth in any of clauses 28 to 29, wherein the first interference report is received in a second stage of a two-stage SCI.

[0199] Clause 31: According to the method described in any one of clauses 28 to 30, the method further includes: sending sidelink control information (SCI) to the second UE, the sidelink control information (SCI) including at least one of information generated by the first UE based on the first interference report or a second interference report generated by the second UE.

[0200] Clause 32: A method as set out in clause 31, wherein the information included in the SCI comprises at least one of the second interference report generated by the second UE or an indication that the first interference report is suitable for use by the first UE to determine a transmission parameter.

[0201] Clause 33: The method of clause 32, further comprising: receiving an indication from the first UE to send the second interference report to the second UE; and including the second interference report in the SCI based on the indication.

[0202] Clause 34: The method according to Clause 32 further includes: determining that the first interference report is suitable for the first UE to determine the transmission parameters by comparing the interference parameters included in the first interference report with the interference parameters generated at the second UE; based on the comparison, including the indication that the first interference report is suitable for the first UE to determine the transmission parameters in the SCI.

[0203] Clause 35: A processing system, the processing system comprising: a memory, the memory comprising computer-executable instructions; one or more processors, the one or more processors configured to execute the computer-executable instructions and cause the processing system to perform the method according to any one of clauses 1-34.

[0204] Clause 36: A processing system comprising means for performing the method of any one of clauses 1 to 34.

[0205] Clause 37: A non-transitory computer readable medium comprising computer executable instructions which, when executed by one or more processors of a processing system, cause the processing system to perform the method of any one of clauses 1 to 34.

[0206] Clause 38: A computer program product embodied on a computer readable storage medium, the computer program product comprising code for performing the method according to any of clauses 1 to 34.

[0207] Clause 39: A first user equipment (UE) for wireless communication, the first user equipment (UE) comprising: a processor; and a memory coupled to the processor, wherein the processor is configured to perform the method according to any one of clauses 1 to 34.

[0208] Additional Wireless Communications Network Considerations

[0209] The techniques and methods described herein can be used in various wireless communication networks (or wireless wide area networks (WWANs)) and radio access technologies (RATs). Although various aspects may be described herein using terms typically associated with 3G, 4G, and / or 5G (e.g., 5G New Radio (NR)) wireless technologies, various aspects of the present disclosure may be equally applicable to other communication systems and standards not explicitly mentioned herein.

[0210] 5G wireless communication networks can support various advanced wireless communication services, such as enhanced mobile broadband (eMBB), millimeter wave (mmWave), machine type communication (MTC), and / or ultra-reliable, low-latency communication (URLLC) for critical missions. These services and other services may include latency requirements and reliability requirements.

[0211] return Figure 1 , aspects of the present disclosure may be performed within the example wireless communication network 100 .

[0212] In 3GPP, the term "cell" can refer to the coverage area of ​​a Node B and / or a narrowband subsystem serving that coverage area, depending on the context in which the term is used. In NR systems, the terms "cell" and BS, next-generation Node B (gNB or gNodeB), access point (AP), distributed unit (DU), carrier, or transmission and reception point are used interchangeably. A BS can provide communication coverage for a macro cell, a pico cell, a femto cell, and / or other types of cells.

[0213] A macro cell may generally cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area (e.g., a stadium) and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG) and UEs of users in the home). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS, a home BS, or a home node B.

[0214] BS 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with EPC 160 via a first backhaul link 132 (e.g., S1 interface). BS 102 configured for 5G (e.g., 5G NR or Next Generation RAN (NG-RAN)) can interface with 5GC 190 via a second backhaul link 184. BS 102 can communicate with each other directly or indirectly (e.g., through EPC 160 or 5GC 190) over a third backhaul link 134 (e.g., X2 interface). The third backhaul link 134 can generally be wired or wireless.

[0215] The small cell 102' may operate in licensed and / or unlicensed spectrum. When operating in the unlicensed spectrum, the small cell 102' may employ NR and use the same 5 GHz unlicensed spectrum used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum may improve coverage and / or increase capacity of the access network.

[0216] Some base stations such as BS 180 (e.g., gNB) may operate in traditional sub-6 GHz spectrum, in millimeter wave (mmWave) frequencies, and / or near mmWave frequencies to communicate with UE 104. When BS 180 operates in mmWave or near mmWave frequencies, BS 180 may be referred to as a mmWave base station.

[0217] The communication link 120 between BS 102 and, for example, UE 104 may be through one or more carriers. For example, for each carrier allocated in a carrier aggregation of up to Yx MHz (x component carriers) for transmission in each direction, BS 102 and UE 104 may use a spectrum of up to Y MHz (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, and other MHz) bandwidth. The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric for DL ​​and UL (e.g., more or fewer carriers may be allocated for DL ​​compared to UL). The component carrier may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0218] The wireless communication network 100 also includes a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154 in, for example, a 2.4 GHz and / or 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) prior to communication to determine whether the channel is available.

[0219] Certain UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a PSSCH, and a physical sidelink control channel (PSCCH). The D2D communication may be through a variety of wireless D2D communication systems, such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on IEEE 802.11 standards, 4G (e.g., LTE), or 5G (e.g., NR), to name just a few options.

[0220] The EPC 160 may include a mobility management entity (MME) 162, other MMEs 164, a serving gateway 166, a multimedia broadcast multicast service (MBMS) gateway 168, a broadcast multicast service center (BM-SC) 170, and a packet data network (PDN) gateway 172. The MME 162 may communicate with a home subscriber server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. In general, the MME 162 provides bearer and connection management.

[0221] Generally, user Internet Protocol (IP) packets are delivered through the Serving Gateway 166, which itself is connected to the PDN Gateway 172. The PDN Gateway 172 provides UE IP address allocation and other functions. The PDN Gateway 172 and the BM-SC 170 are connected to the IP Services 176, which may include, for example, the Internet, an Intranet, an IP Multimedia Subsystem (IMS), PS streaming services, and / or other IP services.

[0222] The BM-SC 170 may provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS delivery, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS delivery. The MBMS Gateway 168 may be used to distribute MBMS services to BSs 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts a particular service, and may be responsible for session management (start / stop) and for collecting eMBMS-related billing information.

[0223] 5GC 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. AMF 192 may communicate with a unified data management (UDM) 196.

[0224] AMF 192 is typically a control node that handles signaling between UE 104 and 5GC 190. Generally speaking, AMF 192 provides QoS flow and session management.

[0225] All user Internet Protocol (IP) packets are delivered through UPF 195, which is connected to IP Services 197 and provides IP address allocation for UEs and other functions for 5GC 190. IP Services 197 may include, for example, the Internet, an intranet, an IP Multimedia Subsystem (IMS), PS streaming services, and / or other IP services.

[0226] return Figure 2 , depicting a BS 102 and a UE 104 (eg, Figure 1 Various example components of a wireless communication network 100).

[0227] At BS 102, transmit processor 220 may receive data from data source 212 and control information from controller / processor 240. The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), and others. In some examples, the data may be for a physical downlink shared channel (PDSCH).

[0228] A Medium Access Control (MAC)-Control Element (MAC-CE) is a MAC layer communication structure that can be used for the exchange of control commands between wireless nodes. The MAC-CE can be carried in a shared channel such as a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), or a PSSCH.

[0229] The transmit processor 220 may process (e.g., encode and symbol map) data and control information to obtain data symbols and control symbols, respectively. The transmit processor 220 may also generate reference symbols (such as for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a PBCH DMRS, and a channel state information reference signal (CSI-RS)).

[0230] The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, and / or reference symbols, where applicable, and may provide an output symbol stream to a modulator (MOD) in a transceiver 232a-232t. Each modulator in the transceiver 232a-232t may process a corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The downlink signals from the modulators in the transceivers 232a-232t may be transmitted via antennas 234a-234t, respectively.

[0231] At the UE 104, antennas 252a-252r may receive downlink signals from the BS 102 and may provide received signals to demodulators (DEMODs) in transceivers 254a-254r, respectively. Each demodulator in the transceivers 254a-254r may condition (e.g., filter, amplify, downconvert, and digitize) a corresponding received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM) to obtain received symbols.

[0232] A MIMO detector 256 may obtain received symbols from all demodulators in transceivers 254a-254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 104 to a data sink 260, and provide decoded control information to a controller / processor 280.

[0233] On the uplink, at the UE 104, the transmit processor 264 may receive and process data from a data source 262 (e.g., for a physical uplink shared channel (PUSCH)) and control information from the controller / processor 280 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 264 may also generate reference symbols for reference signals (e.g., a sounding reference signal (SRS)). The symbols from the transmit processor 264 may be pre-decoded by the TX MIMO processor 266, if applicable, further processed by the modulators in the transceivers 254a-254r (e.g., for SC-FDM), and transmitted to the BS 102.

[0234] At BS 102, uplink signals from UE 104 may be received by antennas 234 a-334 t, processed by demodulators in transceivers 232 a-232 t, detected by MIMO detector 236 if applicable, and further processed by receive processor 238 to obtain decoded data and control information transmitted by UE 104. Receive processor 238 may provide the decoded data to data sink 239 and the decoded control information to controller / processor 240.

[0235] Memory 242 and memory 282 may store data and program codes for BS 102 and UE 104, respectively.

[0236] Scheduler 244 may schedule UEs for data transmission on the downlink and / or uplink.

[0237] 5G can utilize orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP) on uplink and downlink. 5G can also support half-duplex operation using time division duplex (TDD). OFDM and single carrier frequency division multiplexing (SC-FDM) divide the system bandwidth into multiple orthogonal subcarriers, which are also often referred to as tones and boxes. Each subcarrier can be modulated with data. Modulation symbols can be transmitted in the frequency domain using OFDM, and modulation symbols can be transmitted in the time domain using SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers can depend on the system bandwidth. In some examples, the minimum resource allocation (referred to as RB) can be 12 consecutive subcarriers. The system bandwidth can also be divided into subbands. For example, a subband can cover multiple RBs. NR can support a base subcarrier spacing (SCS) of 15KHz, and other SCSs (e.g., 30kHz, 60kHz, 120kHz, 240kHz, and others) can be defined for the base SCS.

[0238] As mentioned above, Figure 3A , Figure 3B , Figure 3C and Figure 3D Describes a method for use in a wireless communication network such as Figure 1 Various example aspects of data structures of a wireless communication network 100).

[0239] In various aspects, the 5G frame structure can be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated to either DL or UL. The 5G frame structure can also be time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated to both DL and UL. Figure 3A and Figure 3C In the example provided, the 5G frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (mostly DL) and subframe 3 is configured with slot format 34 (mostly UL), where D is DL, U is UL, and X is for flexible use between DL / UL. Although subframes 3 and 4 are shown as having slot formats 34 and 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are both DL and both UL, respectively. Other slot formats 2-61 include a mixture of DL, UL, and flexible symbols. The UE is configured with a slot format (dynamically configured by DL control information (DCI), or semi-statically / statically configured by RRC signaling) via a received slot format indicator (SFI). Note that the following description also applies to a 5G frame structure for TDD.

[0240] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10 ms) may be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more time slots. A subframe may also include a mini-time slot, which may include 7, 4, or 2 symbols. In some examples, each time slot may include 7 or 14 symbols, depending on the time slot configuration.

[0241] For example, for slot configuration 0, each slot may include 14 symbols, while for slot configuration 1, each slot may include 7 symbols. The symbols on the DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single-stream transmission).

[0242] The number of slots within a subframe is based on the slot configuration and parameter set. For slot configuration 0, different parameter sets (μ) 0 to 5 allow for 1, 2, 4, 8, 16, and 32 slots per subframe, respectively. For slot configuration 1, different parameter sets 0 to 2 allow for 2, 4, and 8 slots per subframe, respectively. Thus, for slot configuration 0 and parameter set μ, there are 14 symbols / slot and 2μ slots / subframe. The subcarrier spacing and symbol length / duration are a function of the parameter set. The subcarrier spacing can be equal to 2 μ × 15kHz, where μ is parameter set 0 to 5. Thus, parameter set μ=0 has a subcarrier spacing of 15kHz, while parameter set μ=5 has a subcarrier spacing of 480kHz. The symbol length / duration is inversely related to the subcarrier spacing. Figure 3A , Figure 3B , Figure 3C and Figure 3D An example is provided for slot configuration 0 with 14 symbols per slot and parameter set μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs.

[0243] A resource grid may be used to represent the frame structure. Each slot includes an RB (also referred to as a physical RB (PRB)) extending over 12 consecutive subcarriers. The resource grid is divided into a plurality of REs. The number of bits carried by each RE depends on the modulation scheme.

[0244] like Figure 3A As illustrated in FIG. , some REs carry data for UEs (eg, Figure 1 and Figure 2 The RS may include a demodulation RS (DM-RS) (denoted as Rx for one particular configuration, where 100x is the port number, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0245] Figure 3B Examples of various DL channels within a subframe of a frame are illustrated.The Physical Downlink Control Channel (PDCCH) carries DCI within one or more Control Channel Elements (CCEs), each CCE comprising nine RE Groups (REGs), each REG comprising four consecutive REs in an OFDM symbol.

[0246] The primary synchronization signal (PSS) may be in symbol 2 of a particular subframe of a frame. The PSS is transmitted by a UE (e.g., Figure 1 and Figure 2104) is used to determine subframe / symbol timing and physical layer identification.

[0247] A Secondary Synchronization Signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and radio frame timing.

[0248] Based on the physical layer identifier and the physical layer cell identifier group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the aforementioned DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block. The MIB provides the number of RBs in the system bandwidth and the system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information such as system information blocks (SIBs) that are not sent through the PBCH, and paging messages.

[0249] like Figure 3C As illustrated in , some of the REs carry DM-RSs for channel estimation at the base station (indicated as R for one specific configuration, but other DM-RS configurations are possible). The UE may send a DM-RS for a physical uplink control channel (PUCCH) and a DM-RS for a physical uplink shared channel (PUSCH). The PUSCH DM-RS may be sent in the first or first two symbols of the PUSCH. Depending on whether a short PUCCH or a long PUCCH is sent and depending on the specific PUCCH format used, the PUCCH DM-RS may be sent in different configurations. The UE may send a sounding reference signal (SRS). The SRS may be sent in the last symbol of a subframe. The SRS may have a comb structure, and the UE may send the SRS on one of the teeth of the comb. The SRS may be used by the base station for channel quality estimation to achieve frequency-dependent scheduling of the UL.

[0250] Figure 3D Examples of various UL channels within a subframe of a frame are illustrated. The PUCCH may be located at a position as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and HARQ ACK / NACK feedback. The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0251] Additional considerations

[0252] The foregoing description provides an example of interference measurement and reporting in a sidelink communication system. The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. The examples discussed herein are not limited to the scope, applicability, or aspects set forth in the claims. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. For example, without departing from the scope of the present disclosure, the functions and arrangements of the elements discussed may be changed. Various examples may omit, replace, or add various procedures or components as appropriate. For example, the described method may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, the features described for some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using other structures, functions, or structures and functions other than the various aspects of the present disclosure set forth herein or different from the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the claims.

[0253] The techniques described herein can be used for various wireless communication technologies, such as 5G (e.g., 5G NR), 3GPP Long Term Evolution (LTE), Advanced LTE (LTE-A), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and other radio technologies. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000 standards, IS-95 standards, and IS-856 standards. A TDMA network can implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks may implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA and E-UTRA are parts of Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from the organization of the "3rd Generation Partnership Project" (3GPP). cdma2000 and UMB are described in documents from the organization of the "3rd Generation Partnership Project 2" (3GPP2). NR is an emerging wireless communication technology under development.

[0254] The various illustrative logic blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or executed using a general purpose processor, a DSP, an ASIC, a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, a system on a chip (SoC), or any other such configuration.

[0255] If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus may include any number of interconnecting buses and bridges. The bus may link various circuits together, including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter, etc., to the processing system via the bus. The network adapter may be used to implement signal processing functions at the physical (PHY) layer. In user equipment (such as in Figure 1 In the example UE 104 of FIG. 1 , a user interface (e.g., a keypad, display, mouse, joystick, touch screen, biometric sensor, proximity sensor, light emitting element, and others) may also be connected to the bus. The bus may also link various other circuits, such as timing sources, peripheral equipment, voltage regulators, power management circuits, etc., which are well known in the art and therefore will not be described further. The processor may be implemented using one or more general-purpose processors and / or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuits that can execute software. Those skilled in the art will recognize how to best implement the described functionality of the processing system depending on the specific application and the overall design constraints imposed on the entire system.

[0256] If implemented in software, the function may be stored as one or more instructions or codes on a computer-readable medium or sent via a computer-readable medium. Software should be broadly interpreted as meaning instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or other. Computer-readable media include both computer storage media and communication media, including any medium that facilitates the transfer of computer programs from one place to another. The processor may be responsible for managing the bus and general processing, including executing software modules stored on a machine-readable storage medium. A computer-readable storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. In an alternative, the storage medium may be integral with the processor. By way of example, a machine-readable medium may include a transmission line, a carrier modulated by data, and / or a computer-readable storage medium having instructions stored thereon that is separated from a wireless node, all of which may be accessed by a processor through a bus interface. Alternatively or in addition thereto, a machine-readable medium or any part thereof may be integrated into a processor, such as in the case of having a cache and / or a general register stack. By way of example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read only memory), PROM (programmable read only memory), EPROM (erasable programmable read only memory), EEPROM (electrically erasable programmable read only memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. The machine-readable medium may be embodied in a computer program product.

[0257] A software module may include a single instruction, perhaps multiple instructions, and may be distributed over several different code segments, between different programs, and across multiple storage media. A computer-readable medium may include multiple software modules. A software module includes instructions that, when executed by a device such as a processor, cause a processing system to perform various functions. A software module may include a sending module and a receiving module. Each software module may reside in a single storage device or may be distributed across multiple storage devices. By way of example, when a triggering event occurs, a software module may be loaded from a hard drive into a RAM. During the execution of a software module, a processor may load some of the instructions into a cache to increase access speed. One or more cache lines may then be loaded into a general register stack for execution by the processor. When the functionality of a software module is mentioned below, it will be understood that such functionality is implemented by the processor when executing instructions from the software module.

[0258] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items (including single members). For example, "at least one of a, b, or c" is intended to cover a, b, c, ab, ac, bc, and abc, as well as any combination with multiple of the same elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0259] As used herein, the term "determining" encompasses a wide variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, a database, or another data structure), ascertaining, and the like. Additionally, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Additionally, "determining" may include resolving, selecting, choosing, establishing, and the like.

[0260] The method disclosed herein includes one or more steps or actions for implementing the method. The steps and / or actions of the method can be interchangeable with each other without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions can be modified without departing from the scope of the claims. In addition, the various operations of the method described above can be performed by any suitable component capable of performing the corresponding function. The component may include various hardware and / or software components and / or modules, including but not limited to circuits, application specific integrated circuits (ASICs) or processors. Generally speaking, in the case of the operations illustrated in the accompanying drawings, those operations may have corresponding corresponding components with similar numbers plus functional components.

[0261] As used herein, the phrase "based on" should not be interpreted as referring to a closed set of information, one or more conditions, one or more factors, etc. In other words, the phrase "based on A" (where "A" can be information, a condition, a factor, etc.) should be interpreted as "based at least on A" unless specifically stated differently.

[0262] The following claims are not intended to be limited to the various aspects shown herein, but should be given the full scope consistent with the language of the claims. Within the claims, unless explicitly stated, reference to an element in the singular form is not intended to mean "one and only one", but "one or more". Unless otherwise specifically stated, the term "some" refers to one or more. Any claim element should not be interpreted according to the provisions of 35 U.S.C. § 112 (f), unless the phrase "member for..." is used to expressly state the element, or in the case of a method claim, the phrase "step for..." is used to state the element. All structural and functional equivalents of the elements of the various aspects described throughout the present disclosure that are known or will be known later to a person of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. In addition, regardless of whether such disclosure is explicitly stated in the claims, anything disclosed herein is not intended to be disclosed to the public.

Claims

1. A first user equipment (UE) for wireless communication, the first user equipment (UE) comprising: processor; and a memory coupled to the processor, wherein the processor is configured to: receiving signaling indicating resources in a sidelink resource pool configured for sidelink interference measurement; as well as A first interference report including interference measurement information corresponding to the indicated resources is sent to the second UE.

2. The first UE according to claim 1, wherein the interference measurement information indicates at least one of the following items: Interference plus noise covariance matrix; Interference power; interference rank; or or disturbing eigenvalues.

3. The first UE of claim 1, wherein to send the first interference report, the processor is configured to send the first interference report in a second stage of a two-stage sidelink control information (SCI).

4. The first UE according to claim 1, wherein the processor is configured to: receiving sidelink control information (SCI) including information based on the first interference report from the second UE; determining a transmission parameter based on at least one of the information based on the first interference report or a sidelink reference signal (SL-RS) associated with the SCI; and A sidelink transmission is sent to the second UE using the determined transmission parameters.

5. The first UE according to claim 4, wherein the information based on the first interference report comprises at least one of the following items: A second interference report; or The first interference report is suitable for being used by the first UE to determine an indication of the transmission parameter.

6. The first UE according to claim 1, wherein: The first UE is a primary UE; and The processor is configured to send the first interference report to a third UE.

7. The first UE according to claim 1, wherein the signaling indicates a puncturing pattern for puncturing resources of at least one of a physical sidelink shared channel (PSSCH), a demodulation reference signal (DMRS), or a sidelink reference signal (SL-RS).

8. The first UE according to claim 7, wherein the puncturing pattern is indicated in a sidelink radio resource control (RRC) signaling configuration or a medium access control (MAC) control element (CE) signaling configuration, and wherein the puncturing pattern is applied to multiple sidelink resource pools.

9. The first UE according to claim 7, wherein a plurality of puncturing patterns are defined for different side link resource pools, wherein the plurality of puncturing patterns include the puncturing pattern. 10 . The first UE according to claim 7 , wherein the puncturing pattern is a specific puncturing pattern among a plurality of configured puncturing patterns.

11. The first UE according to claim 10, wherein the processor is configured to: sending signaling indicating one of the plurality of configured puncturing patterns to the second UE; and Signaling is received from the second UE confirming selection of an indicated one of the multiple configured puncture patterns for puncturing resources of at least one of the PSSCH, the DMRS or the SL-RS.

12. The first UE according to claim 7, wherein the puncturing pattern indicates resources to be punctured within: One or more DMRS resource elements (REs) within a resource block (RB); or One or more DMRS RE sets within an RB.

13. The first UE of claim 7, wherein the puncturing pattern indicates PSSCH resources to be punctured based on at least one of a comb level or a comb offset.

14. The first UE according to claim 7, wherein the processor is configured to: It is determined whether the puncturing pattern is applied to the scheduled PSSCH.

15. The first UE according to claim 14, wherein in order to determine whether the perforation pattern is applied to the scheduled PSSCH, the processor is configured to determine whether the perforation pattern is applied to the scheduled PSSCH based on at least one of a radio network temporary identifier (RNTI) value, a sidelink control information (SCI) content, an SCI format or a rule.

16. The first UE according to claim 14, wherein the processor is configured to: It is determined whether the puncturing pattern is applied only to DMRS, only to PSSCH, or to both DMRS and PSSCH.

17. The first UE according to claim 7, wherein the puncturing pattern indicates a pattern of SL-RS resources to be punctured, the pattern being associated with: the teeth of a resource element (RE) within a resource block (RB); or A specific RE within the RB.

18. The first UE according to claim 17, wherein the puncturing pattern further indicates RBs to which the pattern is to be applied.

19. The first UE according to claim 1, wherein: The resources indicated by the signaling include sidelink channel state information interference measurement (SL-CSI-IM) resources; and The signaling indicates one or more SL-CSI-IM resources configured according to the side link resource pool.

20. The first UE of claim 1, wherein, in order to send the first interference report, the processor is configured to send the first interference report in at least one of a physical sidelink feedback channel (PSFCH), a medium access control (MAC) control element (CE), or a physical sidelink shared channel (PSSCH).

21. The first UE according to claim 1, wherein the processor is configured to: receiving a second interference report from the second UE; and It is determined whether interference determined at the first UE and interference determined at the second UE have similar characteristics or different characteristics based on the first interference report and the second interference report.

22. The first UE of claim 1, wherein the resource indicated by the signaling comprises a sidelink zero-power channel state information reference signal (SL-ZP-CSI-RS).

23. The first UE according to claim 1, wherein the processor is configured to: Prior to sending the first interference report, signaling is received indicating whether the first UE is to send the first interference report.

24. The first UE according to claim 1, wherein the processor is configured to: Sidelink control information (SCI) is sent to the second UE, the sidelink control information (SCI) including an indication of whether the second UE is to send a second interference report generated by the second UE to the first UE.

25. The first UE according to claim 1, wherein the processor is configured to: The interference measurement information is generated.

26. The first UE according to claim 25, wherein in order to generate the interference measurement information, the processor is configured to: One or more measurements are performed on the indicated resources, wherein the interference information is based on the one or more measurements.

27. A first user equipment (UE) for wireless communication, the first user equipment (UE) comprising: processor; a memory coupled to the processor, wherein the processor is configured to: receiving a first interference report from a second UE, the first interference report comprising interference measurement information corresponding to resources in a sidelink resource pool configured for sidelink interference measurement; as well as Channel estimation is performed on a sidelink channel between the first UE and the second UE based on the interference measurement information.

28. The first UE according to claim 27, wherein the interference measurement information indicates at least one of the following items: Interference plus noise covariance matrix; Interference power; interference rank; or Interference eigenvalues.

29. The first UE of claim 27, wherein to receive the first interference report, the processor is configured to receive the first interference report in a second stage of two-stage sidelink control information (SCI).

30. The first UE according to claim 27, wherein the processor is configured to: Sidelink control information (SCI) is sent to the second UE, the sidelink control information (SCI) including at least one of information generated by the first UE based on the first interference report or a second interference report generated by the second UE.

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