Cross-link interference (CLI) measurement management
By configuring thresholds and using DCI to manage CLI measurements and reporting in SBFD, the method addresses CLI challenges, enhancing measurement accuracy and network performance in 5G NR systems.
Patent Information
- Application Number
- PCT/CN2024/092482
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-11-13
AI Technical Summary
In 5G NR systems with sub-band non-overlapping full duplex (SBFD) operation, cross-link interference (CLI) measurements are challenging due to reduced coverage, increased latency, and capacity issues, particularly in managing device-to-device CLI measurements and reporting.
A method and apparatus for managing CLI measurements by configuring thresholds and indications for skipping or adjusting device-to-device CLI measurements and reporting, using DCI to handle collisions between CSI and SRS transmissions, and coordinating CLI measurement resources.
Enhances CLI measurement accuracy and reduces reporting delays by optimizing CLI measurement and reporting processes in SBFD environments, improving network performance.
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Figure CN2024092482_13112025_PF_FP_ABST
Abstract
Description
CROSS-LINK INTERFERENCE (CLI) MEASUREMENT MANAGEMENT
[0001] FIELDS
[0002] Various example embodiments of the present disclosure generally relate to the field of telecommunication and, in particular, to methods, devices, apparatuses and computer readable storage medium of cross-link interference (CLI) measurement management.BACKGROUND
[0003] In some communication systems such as fifth generation (5G) new radio (NR) system, various duplexing modes are supported. For example, frequency division duplexing (FDD) for paired bands and time division duplexing (TDD) for unpaired bands are supported. In TDD, the time domain resource is split between downlink (DL) and uplink (UL) . Allocation of a limited time duration for the uplink in TDD may result in reduced coverage, increased latency, and reduced capacity. To address these issues, an evolution of duplexing operation has been proposed. In some mechanism, sub-band non-overlapping full duplex (SBFD) such as simultaneous DL and UL transmission on different physical resource blocks (PRBs) or sub-bands within an unpaired wideband NR cell is proposed. SBFD introduces various kinds of cross-link interferences (CLI) in SBFD operation. How to perform a CLI measurement in SBFD has become a concerning problem.SUMMARY
[0004] In a first aspect of the present disclosure, there is provided a first apparatus. The first apparatus comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus to: receive, from a second apparatus, information comprising at least one of: a first indication of skipping a measurement of a device-to-device cross-link interference (CLI) , a second indication of a change of a device-to-device CLI measurement metric, a third indication of a resource for the device-to-device CLI measurement, or a configuration of a threshold for determining reporting of the measurement of the device-to-device CLI; and perform, based on the information, one of: a skip of the measurement of device-to-device CLI; a skip of a reporting of the measurement of the device-to-device CLI; or the measurement of device-to-device CLI based on at least one of: the changed device-to-device CLI measurement metric, or the indicated resource for the device-to-device CLI, wherein a transmission from the second apparatus to the first apparatus is in a resource configured for sub-band non-overlapping full-duplex (SBFD) .
[0005] In a second aspect of the present disclosure, there is provided a second apparatus. The second apparatus comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the second apparatus to perform at least one of: transmitting, to at least a first apparatus, a configuration of a threshold for determining reporting of a measurement of a device-to-device cross-link interference (CLI) ; based on a first collision resulting in a skip of a channel state information measurement of the first apparatus for a first occasion, transmitting, to a third apparatus, an indication of skipping a transmission of a sounding reference signal for the first occasion; or based on a second collision resulting in a skip of a sounding reference signal transmission of a third apparatus on a second occasion, transmitting, to the first apparatus, information regarding a measurement of a device-to-device CLI.
[0006] In a third aspect of the present disclosure, there is provided a method. The method comprises: receiving, from a second apparatus, information comprising at least one of: a first indication of skipping a measurement of a device-to-device cross-link interference (CLI) , a second indication of a change of a device-to-device CLI measurement metric, a third indication of a resource for the device-to-device CLI measurement, or a configuration of a threshold for determining reporting of the measurement of the device-to-device CLI; and performing, based on the information, one of: a skip of the measurement of device-to-device CLI; a skip of a reporting of the measurement of the device-to-device CLI; or thing measurement of device-to-device CLI based on at least one of: the changed device-to-device CLI measurement metric, or the indicated resource for the device-to-device CLI, wherein a transmission from the second apparatus to the first apparatus is in a resource configured for sub-band non-overlapping full-duplex (SBFD) .
[0007] In a fourth aspect of the present disclosure, there is provided a method. The method comprises: transmitting, to at least a first apparatus, a configuration of a threshold for determining reporting of a measurement of a device-to-device cross-link interference (CLI) ; based on a first collision resulting in a skip of a channel state information measurement of the first apparatus for a first occasion, transmitting to a third apparatus, an indication of skipping a transmission of a sounding reference signal for the first occasion; or based on a second collision resulting in a skip of a sounding reference signal transmission of a third apparatus on a second occasion, transmitting to the first apparatus, information regarding a measurement of a device-to-device CLI.
[0008] In a fifth aspect of the present disclosure, there is provided a first apparatus. The first apparatus comprises means for receiving, from a second apparatus, information comprising at least one of: a first indication of skipping a measurement of a device-to-device cross-link interference (CLI) , a second indication of a change of a device-to-device CLI measurement metric, a third indication of a resource for the device-to-device CLI measurement, or a configuration of a threshold for determining reporting of the measurement of the device-to-device CLI; and means for performing, based on the information, one of: a skip of the measurement of device-to-device CLI; a skip of a reporting of the measurement of the device-to-device CLI; or the measurement of device-to-device CLI based on at least one of: the changed device-to-device CLI measurement metric, or the indicated resource for the device-to-device CLI, wherein a transmission from the second apparatus to the first apparatus is in a resource configured for sub-band non-overlapping full-duplex (SBFD) .
[0009] In a sixth aspect of the present disclosure, there is provided a second apparatus. The second apparatus comprises means for transmitting, to at least a first apparatus, a configuration of a threshold for determining reporting of a measurement of a device-to-device cross-link interference (CLI) ; means for based on a first collision resulting in a skip of a channel state information measurement of the first apparatus for a first occasion, transmitting to a third apparatus, an indication of skipping a transmission of a sounding reference signal for the first occasion; or means for based on a second collision resulting in a skip of a sounding reference signal transmission of a third apparatus on a second occasion, transmitting to the first apparatus, information regarding a measurement of a device-to-device CLI.
[0010] In a seventh aspect of the present disclosure, there is provided a computer readable medium. The computer readable medium comprises instructions stored thereon for causing an apparatus to perform the method according to the third or fourth aspect.
[0011] It is to be understood that the Summary section is not intended to identify key or essential features of embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Some example embodiments will now be described with reference to the accompanying drawings, where:
[0013] FIG. 1 illustrates an example communication environment in which example embodiments of the present disclosure can be implemented;
[0014] FIG. 2A illustrates an example diagram of frequency-time resource partitioning for FDD;
[0015] FIG. 2B illustrates an example diagram of frequency-time resource partitioning for TDD;
[0016] FIG. 2C illustrates an example diagram of frequency-time resource partitioning for SBFD;
[0017] FIG. 2D illustrates an example of SBFD slots and non-SBFD slots;
[0018] FIG. 3A illustrates several examples of co-channel cross-link interference types in SBFD deployment;
[0019] FIG. 3B illustrates further examples of co-channel cross-link interference types in SBFD deployment;
[0020] FIG. 4 illustrates a periodic channel state information (CSI) measurements with periodic sounding reference signal (SRS) reference signal received power (RSRP) ;
[0021] FIG. 5 illustrates a signaling flow for CLI measurement management according to some example embodiments of the present disclosure;
[0022] FIG. 6A illustrates an example indication of SRS absence and skipping of associated CSI report according to some example embodiments of the present disclosure;
[0023] FIG. 6B illustrates an example indication of SRS absence and CSI reporting without CLI for that given occurrence according to some example embodiments of the present disclosure;
[0024] FIG. 7 illustrates an example indication of SRS absence and change of SRS-RSRP to CLI received signal strength indicator (RSSI) according to some example embodiments of the present disclosure;
[0025] FIG. 8 illustrates an example indication of SRS absence and indication of second CLI measurement resources according to some example embodiments of the present disclosure;
[0026] FIG. 9 illustrates an example SRS cancellation due to handling resulting in CSI skipping at the victim UE according to some example embodiments of the present disclosure;
[0027] FIG. 10 illustrates a signaling flow for CSI and CLI measurements and reporting skipping for measurement according to some example embodiments of the present disclosure;
[0028] FIG. 11 illustrates a signaling flow for CLI measurement skipping while CSI measurements and reporting are performed according to some example embodiments of the present disclosure;
[0029] FIG. 12 illustrates a signaling flow for CSI and CLI measurements with change in measurement metric according to some example embodiments of the present disclosure;
[0030] FIG. 13 illustrates a signaling flow for CSI and CLI measurements performed using secondary CLI measurement resources according to some example embodiments of the present disclosure;
[0031] FIG. 14 illustrates a signaling flow for UE autonomous determination of SRS presence and decision for partial of full CSI report according to some example embodiments of the present disclosure;
[0032] FIG. 15 illustrates a signaling flow for SRS skipping indication at aggressor UE according to some example embodiments of the present disclosure;
[0033] FIG. 16 illustrates a collision handing in aperiodic CSI and aperiodic SRS according to some example embodiments of the present disclosure;
[0034] FIG. 17 illustrates a flowchart of a method implemented at a first apparatus according to some example embodiments of the present disclosure;
[0035] FIG. 18 illustrates a flowchart of a method implemented at a second apparatus according to some example embodiments of the present disclosure;
[0036] FIG. 19 illustrates a simplified block diagram of a device that is suitable for implementing example embodiments of the present disclosure; and
[0037] FIG. 20 illustrates a block diagram of an example computer readable medium in accordance with some example embodiments of the present disclosure.
[0038] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0039] Principle of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. Embodiments described herein can be implemented in various manners other than the ones described below.
[0040] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0041] References in the present disclosure to “one embodiment, ” “an embodiment, ” “an example embodiment, ” and the like indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
[0042] It shall be understood that although the terms “first, ” “second” and the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.
[0043] As used herein, “at least one of the following: <a list of two or more elements>” and “at least one of <a list of two or more elements>” and similar wording, where the list of two or more elements are joined by “and” or “or” , mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements.
[0044] As used herein, unless stated explicitly, performing a step “in response to A” does not indicate that the step has to be performed immediately after “A” occurs and one or more intervening steps may be included.
[0045] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a” , “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” , “comprising” , “has” , “having” , “includes” and / or “including” , when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.
[0046] As used in this application, the term “circuitry” may refer to one or more or all of the following:
[0047] (a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) and
[0048] (b) combinations of hardware circuits and software, such as (as applicable) :
[0049] (i) a combination of analog and / or digital hardware circuit (s) with software / firmware and
[0050] (ii) any portions of hardware processor (s) with software (including digital signal processor (s) ) , software, and memory (ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and
[0051] (c) hardware circuit (s) and or processor (s) , such as a microprocessor (s) or a portion of a microprocessor (s) , that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation.
[0052] This definition of circuitry applies to all uses of this term in this application, including in any claims. As a further example, as used in this application, the term circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
[0053] As used herein, the term “communication network” refers to a network following any suitable communication standards, such as New Radio (NR) , Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , Narrow Band Internet of Things (NB-IoT) and so on. Furthermore, the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, and / or any other protocols either currently known or to be developed in the future. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned system.
[0054] As used herein, the term “network device” or “network access device” refers to a node in a communication network via which a terminal device accesses the network and receives services therefrom. The network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , an NR NB (also referred to as a gNB) , a Remote Radio Unit (RRU) , a radio head (RH) , a remote radio head (RRH) , a relay, an Integrated Access and Backhaul (IAB) node, a low power node such as a femto, a pico, a non-terrestrial network (NTN) or non-ground network device such as a satellite network device, a low earth orbit (LEO) satellite and a geosynchronous earth orbit (GEO) satellite, an aircraft network device, and so forth, depending on the applied terminology and technology. In some example embodiments, radio access network (RAN) split architecture comprises a Centralized Unit (CU) and a Distributed Unit (DU) at an IAB donor node. An IAB node comprises a Mobile Terminal (IAB-MT) part that behaves like a UE toward the parent node, and a DU part of an IAB node behaves like a base station toward the next-hop IAB node.
[0055] The term “terminal device” refers to any end device that may be capable of wireless communication. By way of example rather than limitation, a terminal device may also be referred to as a communication device, user equipment (UE) , a Subscriber Station (SS) , a Portable Subscriber Station, a Mobile Station (MS) , or an Access Terminal (AT) . The terminal device may include, but not limited to, a mobile phone, a cellular phone, a smart phone, voice over IP (VoIP) phones, wireless local loop phones, a tablet, a wearable terminal device, a personal digital assistant (PDA) , portable computers, desktop computer, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, vehicle-mounted wireless terminal devices, wireless endpoints, mobile stations, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , USB dongles, smart devices, wireless customer-premises equipment (CPE) , an Internet of Things (IoT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device and applications (e.g., remote surgery) , an industrial device and applications (e.g., a robot and / or other wireless devices operating in an industrial and / or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and / or industrial wireless networks, and the like. The terminal device may also correspond to a Mobile Termination (MT) part of an IAB node (e.g., a relay node) . In the following description, the terms “terminal device” , “communication device” , “terminal” , “user equipment” and “UE” may be used interchangeably.
[0056] As used herein, the term “resource, ” “transmission resource, ” “resource block, ” “physical resource block” (PRB) , “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, for example, a communication between a terminal device and a network device, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like. In the following, unless explicitly stated, a resource in both frequency domain and time domain will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.
[0057] As briefly mentioned above, various duplexing modes such as FDD and TDD are supported in the communication networks. In TDD, the time domain resource is split between downlink (DL) and uplink (UL) . Allocation of a limited time duration for the uplink in TDD may result in reduced coverage, increased latency, and reduced capacity. To address these challenges, simultaneous DL and UL transmission on different PRBs or sub-bands within an unpaired wideband NR cell is proposed. As used herein, the set of PRBs assigned to a specific link direction is known as subband, and this new way of duplexing is referred to as “SBFD” . As used herein, the term “SBFD” may also be referred to as cross division duplexing (xDD) or flexible division duplexing (FDU) .
[0058] Principles and implementations of the present disclosure will be described in detail below with reference to FIGS. 1-11. FIG. 1 illustrates an example communication environment 100 in which example embodiments of the present disclosure can be implemented. In the communication environment 100, a plurality of communication apparatuses, including a first apparatus 110, a second apparatus 120 and a third apparatus 130 can communicate with each other. In some example embodiments, there may be additional apparatuses such as a fourth apparatus 140 in the communication environment. The fourth apparatus 140 may communicate with the second apparatus 120.
[0059] The communication environment 100 may support various of duplexing modes, such as FDD and TDD. In some example embodiments, SBFD may be supported by the first apparatus 110, the second apparatus 120 and the third apparatus 130.
[0060] In some example embodiments, if the first apparatus 110 and the third apparatus 130 are terminal devices and the second apparatus 120 is a network device serving the terminal devices, a link from the second apparatus 120 to the first apparatus 110 (or the third apparatus 130) is referred to as a downlink (DL) , and a link from the first apparatus 110 (or the third apparatus 130) to the second apparatus 120 is referred to as an uplink (UL) . In DL, the second apparatus 120 is a transmitting (TX) device (or a transmitter) and the first apparatus 110 (or the third apparatus 130) is a receiving (RX) device (or a receiver) . In UL, the first apparatus 110 (or the third apparatus 130) is a TX device (or a transmitter) and the second apparatus 120 is a RX device (or a receiver) .
[0061] In some example embodiments, if the first apparatus 110 and the third apparatus 130 are in an SBFD mode. Assuming that a transmission from the third apparatus 130 to the second apparatus 120 and a transmission from the second apparatus 120 to the first apparatus 110 is in SBFD, the first apparatus 110 may be referred to as a “victim apparatus” or “victim device” , and the third apparatus 130 may be referred to as an “aggressor apparatus” or “aggressor device” . In embodiments where the first and third apparatuses are terminal devices or UEs, the first apparatus 110 may be referred to as “victim terminal device” or “victim UE” , and the third apparatus 130 may be referred to as “aggressor terminal device” or “aggressor UE” .
[0062] In some example embodiments, there may be more than one victim apparatus or more than one aggressor apparatus. For example, the fourth apparatus 140 may be another victim apparatus of the aggressor third apparatus 130. For another example, the fourth apparatus 140 may be another aggressor apparatus of the victim first apparatus 110.
[0063] It is to be understood that the roles of these apparatuses may be varied. For example, in a first time period, the first apparatus 110 may be a victim apparatus and the third apparatus 130 may be an aggressor apparatus. In a different second time period, the first apparatus 110 may become an aggressor apparatus, and the third apparatus 130 or the fourth apparatus 140 may become a victim apparatus. In a third time period, if the second apparatus 120 performs uplink transmission and the first apparatus 110 does not perform any downlink or uplink transmission, the first apparatus 110 may be referred to as a listening apparatus. As used herein, the listening apparatus may be a listening terminal device or a listening UE.
[0064] It is to be understood that the number of apparatuses and their connections shown in FIG. 1 are only for the purpose of illustration without suggesting any limitation. The communication environment 100 may include any suitable number of apparatuses configured to implementing example embodiments of the present disclosure.
[0065] In the following, for purpose of illustration, some example embodiments are described with the first apparatus 110 operating as a first terminal device, the second apparatus 120 operating as a network node (also referred to as a network device) and the third apparatus 130 operating as a second terminal device. However, in some example embodiments, operations described in connection with a terminal device may be implemented at a network node or other device, and operations described in connection with a network node may be implemented at a terminal device or other device.
[0066] In addition, for purpose of illustration, some example embodiments are described with the first apparatus 110 operating as a victim UE or listening UE and the third apparatus 130 operating as an aggressor UE. However, in some example embodiments, operations described in connection with a victim UE or a listening UE may be implemented at an aggressor UE or other device, and operations described in connection with an aggressor UE may be implemented at a victim UE, a listening UE or other device.
[0067] Communications in the communication environment 100 may be implemented according to any proper communication protocol (s) , comprising, but not limited to, cellular communication protocols of the first generation (1G) , the second generation (2G) , the third generation (3G) , the fourth generation (4G) , the fifth generation (5G) , the sixth generation (6G) , and the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and / or any other protocols currently known or to be developed in the future. Moreover, the communication may utilize any proper wireless communication technology, comprising but not limited to: Code Division Multiple Access (CDMA) , Frequency Division Multiple Access (FDMA) , Time Division Multiple Access (TDMA) , Frequency Division Duplex (FDD) , Time Division Duplex (TDD) , Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Division Multiple (OFDM) , Discrete Fourier Transform spread OFDM (DFT-s-OFDM) and / or any other technologies currently known or to be developed in the future.
[0068] As discussed, various of duplexing modes, such as FDD and TDD are supported. FIG. 2A illustrates an example diagram 210 of frequency-time resource partitioning for FDD. As illustrated, the resources for the DL transmission and UL transmission may be partitioned by frequency. That is, the DL transmission and UL transmission use resources in different frequency sub-bands.
[0069] FIG. 2B illustrates an example diagram 230 of frequency-time resource partitioning for TDD. As illustrated, the resources for the DL transmission and UL transmission may be partitioned by time. That is, the DL transmission and UL transmission use resources corresponding to different time slots.
[0070] FIG. 2C illustrates an example diagram 250 of frequency-time resource partitioning for SBFD. As illustrated, in SBFD, simultaneous DL and UL transmission on different PRBs or sub-bands are supported. Each sub-band for DL transmission is not overlapped with a sub-band for UL transmission.
[0071] In some example embodiments, a plurality of time slots supporting SBFD may be divided into two slot types, that is an SBFD slot type and a non-SBFD slot type. As used herein, the term “SBFD slot” refers to a slot during which the non-overlapping DL sub-band (s) and UL sub-band (s) both exist. As used herein, the term “non-SBFD slot” refers to a slot during which the entire band is used for either DL or UL. The non-SBFD slot may be also referred to as a legacy slot or a full DL / UL slot. FIG. 2D illustrates an example diagram showing a plurality of slots, including SBFD slot (s) 270, and non-SBFD slots 260 and 280.
[0072] In some mechanisms, several SBFD operation modes have been studied including whether time and frequency locations of subbands for SBFD operation are known to the SBFD-aware UE or not. It has, however, been agreed in the third generation partnership project (3GPP) radio access network (RAN) 1#110 meeting that at least the operation mode with time and frequency locations of subbands for SBFD operation being known to the SBFD-aware UE is prioritized. This means that SBFD slots should be known by the (SBFD-aware) UE in one way or another. For example, the UE might receive the SBFD configuration by the network as part of the cell-specific configuration.
[0073] SBFD introduces several new types of CLI, such as co-channel inter-subband CLI from non-overlapping frequency resources. This interference may be better classified depending on the source of the interference. FIG. 3A illustrates several examples of co-channel cross-link interference types in SBFD deployment. As illustrated, a UE 310 and a UE 330 are served by a gNB 320, and a UE 340 and a UE 360 are served by a gNB 350. In the showing time instant, the UE 310 performs a UL transmission to the gNB 320, and the UE 330 receives DL transmission from the gNB 320. Likewise, the UE 340 transmits a UL transmission to the gNB 350, and the UE 360 receives a DL transmission from the gNB 360. It is assumed that a same frequency domain partitioning may be applied in the SBFD deployment.
[0074] In the environment of FIG. 3A, the co-channel inter-subband CLI from non-overlapping frequency resources may include a gNB self-interference between DL and UL. The co-channel inter-subband CLI from non-overlapping frequency resources may further include intra-cell UE-to-UE co-channel inter-subband CLI between the UE 310 and the UE 330. In addition, the co-channel inter-subband CLI from non-overlapping frequency resources may include inter-cell UE-to-UE co-channel inter-subband CLI such as the CLI between the UE 330 and the UE 340 and gNB-to-gNB co-channel inter-subband CLI between the gNB 320 and the gNB 350.
[0075] In case of different frequency domain partitioning in neighbor cells, the system may also suffer from co-channel CLI from overlapping frequency resources. FIG. 3B illustrates further examples of co-channel CLI types in SBFD deployment. In FIG. 3B, it is assumed that the gNB 320 and the gNB 350 may apply different frequency domain partitioning. As illustrated, the environment or system may suffer the gNB-to-gNB inter-cell co-channel CLI from overlapping frequency resources and the UE-to-UE inter-cell co-channel CLI from overlapping frequency resources.
[0076] Several examples of CLI in SBFD operation have been described with respect to FIG. 3A and FIG. 3B. The importance of these new interference types has been extensively studied by system-level simulations during the 3GPP study item. In the present disclosure, it focuses on the UE-to-UE CLI, especially the intra-cell UE-to-UE co-channel inter-subband CLI.
[0077] Several studies and experiments have been conducted for the DL UE throughput for an urban macro scenario adopting SBFD. In such scenario, the UEs are dropped in confined areas (such as clusters) , so that the UE-to-UE CLI is present. Comparing the DL user perceived throughput (UPT) for SBFD and TDD with different configurations, it was detected that DL throughput such as UPT for SBFD with any of the SBFD configurations is lower than that of the static TDD. The DL performance degradation is especially noticeable on a lower percentile DL average UPT such as 5th-percentile DL average UPT, which represents the UEs deployed at a cell edge. That is, in case that a cell-edge UE is transmitting with high transmit power while another (for example nearby) cell-edge UE is receiving in DL, the CLI level may be quite high and significantly impact the DL throughput of the cell-edge UE.
[0078] In some mechanisms, the serving gNB needs to be aware of the DL UE CLI conditions, such that the gNB can apply CLI mitigation schemes. Therefore, CLI measurements are needed for an optimal SBFD operation. For example, UE-to-UE CLI measurements are needed.
[0079] In some mechanisms, since the study item in duplex evolution, there has been discussions on improving the existing CLI measurements by introducing layer one (L1) / layer two (L2) CLI measurements, which are expected to provide faster CLI awareness to the serving gNB.
[0080] A mechanism is to enable L1 / L2 CLI measurement is to re-use the CSI framework. This means that the CLI measurements will be included as part of the CSI measurements. The expectation is that the CSI configuration would include certain resources where the CLI would be measured. The UE could report the CLI as an independent metric or as part of the existing CSI metrics (e.g., channel quality indicator (CQI) and / or L1-signal to interference plus noise ratio (SINR) ) .
[0081] Moreover, there are discussions on how the UE should perform the CLI measurements within a SBFD slot. In one method, the UE measures RSRP of the aggressor UE within the UL subband, and in a second method the UE measures RSSI within the UE subband.
[0082] In some mechanisms, L1 / L2 based UE-to-UE co-channel CLI measurement and reporting is proposed. Measurement resources may be periodic, semi-persistent, or aperiodic, e.g., SRS, CLI-RSSI measurement resources, CLI-interference measurement resource (IMR) , CSI-interference measurement (IM) . Reference signals for measurement may be periodic, semi-persistent, or aperiodic with dedicated usage for CLI measurement. Measurement reporting may be periodic, semi-persistent, aperiodic and event-triggered reporting on physical uplink control channel (PUCCH) or physical uplink shared channel (PUSCH) . The reporting quantity may be for example SRS-RSRP, CLI-RSSI, CQI, L1-SINR, or the like.
[0083] However, how the UE could be configured to perform the L1 / L2 CLI measurements needs to be considered. The present disclosure focuses on L1 / L2 UE-to-UE CLI measurements performed over the UL subband and how those may be integrated into the existing CSI framework. The idea scope spans also to collision handling for half-duplex UEs and the implications to the CSI measurements and reporting.
[0084] In the following description, it is assumed that a victim UE measures the UE-to-UE CLI by measuring the RSRP of a one or more aggressor UEs. As used herein, the term “CLI measurements” may refer to the SRS-RSRP CLI measurements. The scope of the idea is intra-cell CLI measurements.
[0085] In some frameworks for CSI, the serving gNB configures the CSI-RS resources where the UE is expected to measure. Now with the addition of the CLI measurements, the serving gNB shall coordinate not only the CSI-RS transmission, but also the aggressor UE SRS transmission.
[0086] Examples of the configurations of CSI resources and CSI reporting are shown in Table 1 below, which may refer to a predefined standard.
[0087] Table 1
[0088] CSI-RS (CSI measurement resources) may be periodic, and therefore, the most straightforward configuration is to also assume that the aggressor SRS (CLI measurement resources) are periodic with the same periodicity.
[0089] Regarding collision handling, i.e., what should be the UE behavior when DL and UL transmissions are allocated over the same SBFD symbol. There are different cases under study. One case being the collision created by a dynamically scheduled DL and a semi-static.
[0090] In some mechanisms, dynamically scheduled DL reception and semi-statically configured UL transmission are compared, for example, dynamic physical downlink shared channel (PDSCH) or CSI-RS collides with configured SRS, PUCCH, or configured grant (CG) PUSCH. In the SBFD symbol for SBFD-aware UEs, it is proposed to reuse the existing collision handling principles and timeline in NR for operation on flexible symbols on a single carrier in unpaired spectrum, i.e. UL transmission is cancelled if cancellation timeline is met. In addition, in some mechanisms, semi-statically configured DL reception is compared with dynamically configured UL transmission.
[0091] The problem to solve is how to handle cases in which a victim UE is configured with periodic CSI+CLI measurements and the aggressor UEs is configured with SRS transmissions. For certain CSI+CLI measurements, the aggressor UE is scheduled by a dynamic PDSCH / PUSCH / PUCCH (with higher priority than SRS) and the aggressor UE faces a collision. A new victim UE behavior is needed to be able to cope with these situations, otherwise, the UE could report an inaccurate CSI report.
[0092] FIG. 4 illustrates a diagram 400 of a periodic CSI measurement with periodic SRS-RSRP. Ideally, the CSI+CLI periodic measurements would occur as shown in FIG.
[0093] 4. However, due to half-duplex UEs certain SRS or CSI occasions at aggressor and victim UEs respectively can be missing.
[0094] In order to solve at least part of the above problems or other potential problems, according to the present solution on CLI measurement management, a second apparatus (for example, a network device) transmits, to at least a first apparatus (for example, a terminal device or a victim UE) , a configuration of a threshold for determining reporting of a measurement of a device-to-device CLI. Based on a first collision resulting in a skip of a channel state information measurement of the first apparatus for a first occasion, the second apparatus transmits, to a third apparatus such as an aggressor UE, an indication of skipping a transmission of a sounding reference signal for the first occasion. In this way, the third apparatus can know when to skip transmitting the SRS. Based on a second collision resulting in a skip of a sounding reference signal transmission of a third apparatus on a second occasion, the second apparatus transmits, to the first apparatus, information regarding a measurement of a device-to-device CLI. In this way, the first apparatus can be informed about whether to and / or how to perform the device-to-device CLI measurement.
[0095] FIG. 5 illustrates a signaling flow 500 for CLI measurement according to some example embodiments of the present disclosure. The signaling flow 500 involves the first apparatus 110, the second apparatus 120 and the third apparatus 130 in FIG. 1. For purpose of illustration, the signaling flow 500 will be described with respect to FIG. 1. For purpose of discussion, some example embodiments are described where the first apparatus 110 is implemented as a victim UE, the second apparatus 120 is implemented as a network device and the third apparatus 130 is implemented as an aggressor UE. It is assumed that the second apparatus 120 is in full control of the scheduling decisions at both the aggressor and victim UEs.
[0096] It is assumed that in the signaling flow 500, an SBFD mode is enabled or initiated. For example, the second apparatus 120 may transmit SBFD configuration to the first apparatus 110 and the third apparatus 130. The first apparatus 110 and the third apparatus 130 may receive the SBFD configuration. The SBFD configuration may indicate the SBFD slots or symbols and / or the non-SBFD slots or symbols. The SBFD configuration may further include SBFD CLI measurement configuration. For example, the SBFD CLI measurement configuration may be transmitted via system information block (SIB) or radio resource control (RRC) or any other suitable signaling. As used herein, an apparatus receiving the SBFD configuration may be referred to as an “SBFD” aware apparatus. That is, the first apparatus 110 is an SBFD aware apparatus.
[0097] By way of example, the SBFD configuration may include but is not limited to: a frequency band; a number of slots or symbols where the frequency band is split into a plurality of subbands and where at least one subband is used for DL transmissions and at least one subband is used for UL transmissions, i.e., SBFD slots / symbols, and locations of the number of slots / symbols in a radio frame; a number of slots / symbols wherein the entire frequency band is used for DL transmissions or UL transmissions or Flexible transmissions, i.e., non-SBFD slots / symbols, and locations of the number of slots / symbols in a radio frame, or some measurement and report configurations. It is to be understood these parameter or configurations are only for purpose of discussion. The SBFD configuration may include any suitable parameter or configuration. Scope of the present disclosure is not limited here.
[0098] In operation, the second apparatus 120 transmits (510) , to at least the first apparatus 110, a configuration of a threshold for determining reporting of a measurement of a device-to-device CLI. The first apparatus 110 receives (520) the configuration. The second apparatus 120 may also transmit the configuration of the threshold to other devices or UEs such as the third apparatus 130. The configuration may be transmitted via RRC or any other suitable signaling or message.
[0099] The second apparatus 120 may detect collision (s) . For example, if the second apparatus 120 detect (570) a first collision resulting in a skip of a CSI measurement of the first apparatus 110 for a first occasion, the second apparatus 120 transmits (580) , to the third apparatus 130 such as an aggressor UE, an indication of skipping a transmission of an SRS for the first occasion. The third apparatus 130 receives (590) the indication. The third apparatus 130 may skip (595) the transmission of SRS for the first occasion, accordingly. In this way, the third apparatus 130 can know when to skip transmitting the SRS.
[0100] By way of example, the indication of skipping the transmission of SRS may be via downlink control information (DCI) or any other suitable signaling or message. As used herein, the indication of skipping the transmission of SRS may also be referred to as “SRS skipping indication” .
[0101] If the second apparatus 120 detects (530) a second collision resulting in a skip of a sounding reference signal transmission of the third apparatus 130 on a second occasion, the second apparatus 120 transmits (540) , to the first apparatus 110, information regarding a measurement of a device-to-device CLI. The first apparatus 110 receives (550) the information. The first apparatus 110 performs (560) an action based on the received configuration and / or the received message. In this way, the first apparatus 110 can be informed about whether to and / or how to perform the device-to-device CLI measurement. The information may be via DCI or any other suitable signaling or message.
[0102] The collision handling occurs on a time transmission interval (TTI) basis and therefore, RRC reconfiguration may be slow to be used as a solution. By informing the first apparatus 110 and / or the third apparatus 130 via DCI, the delay can be reduced.
[0103] In some example embodiments, the information regarding the measurement of the device-to-device CLI may include at least one of: a first indication of skipping a measurement of a device-to-device CLI for the second occasion, a second indication of a change of a device-to-device CLI measurement metric for the second occasion, or a third indication of a resource for the device-to-device CLI measurement for the second occasion. The first apparatus 110 performs (560) , based on the information, one of: a skip of the measurement of device-to-device CLI, a skip of a reporting of the measurement of the device-to-device CLI, or the measurement of device-to-device CLI based on at least one of:the changed device-to-device CLI measurement metric, or the indicated resource for the device-to-device CLI. Further details of the performance of the first apparatus 110 will be described with respect to the following figures.
[0104] The second apparatus 120 may be aware of the victim UE CLI measurement configuration as well as the aggressor UE scheduling decisions. In case that there is a collision handling in which the periodic SRS from the third apparatus 130 (that is, the aggressor UE) is not transmitted, the second apparatus 120 detects (530) the second collision at the second occasion. The second apparatus 120 may indicate the first apparatus 110 (that is, the victim UE) to not measure CLI for a given CSI measurement occasion.
[0105] In some example embodiments, the information comprises the first indication of skipping the measurement of device-to-device CLI for a second occasion and skipping a measurement report for a third occasion associated with the second occasion. Such first indication may be referred to as CLI measurement and reporting skipping indication or CSI measurement skipping indication. The first apparatus 110 may skip the measurement of device-to-device CLI for the second occasion; skip a measurement of channel state information (CSI) for the second occasion; and skip a report of the measurement of device-to-device CLI and the measurement of CSI for the third occasion.
[0106] FIG. 6A illustrates an example diagram 600 of an indication of SRS absence and skipping of associated CSI report according to some example embodiments of the present disclosure. As shown, the SRSs at occasions 610 and 630 are skipped by the third apparatus 130 due to collisions. CSI measurement skip indications 620 and 640 are received by the first apparatus 110. The first apparatus 110 may skip the CSI measurements and the associated reporting at occasions 625 and 645 corresponding to the occasions 610 and 630. Such indication may reduce the measurements and reporting complexity at the UE, save bits that can be used for PUSCH if CSI is reported in PUSCH.
[0107] In some example embodiments, if the first indication further indicates to skip a measurement reporting for the third occasion associated with the second occasion, the second apparatus 120 may skip a transmission of a CSI-RS for the second occasion. In this way, the signaling overhead can be further reduced.
[0108] In some example embodiments, the information comprises the first indication of skipping the measurement of device-to-device CLI for the second occasion. Such first indication may be referred to as CLI measurement skipping indication or CSI measurement without CLI indication. The first apparatus 110 may skip the measurement of device-to-device CLI for the second occasion; perform a measurement of channel state information (CSI) for the second occasion; and transmit a report of the measurement of CSI without the measurement of device-to-device CLI to the second apparatus 120 at a third occasion associated with the second occasion.
[0109] FIG. 6B illustrates an example diagram 650 of an indication of SRS absence and skipping of associated CSI report according to some example embodiments of the present disclosure. As shown, the SRSs at occasions 610 and 630 are skipped by the third apparatus 130 due to collisions. CSI measurement skip indications 620 and 640 are received by the first apparatus 110. The first apparatus 110 may continue performing the CSI measurements without the CLI. As shown, the report at occasions 665 and 675 are without CLI measurements. Such indication may reduce the measurements and reporting complexity at the UE, and may save bits that can be used for PUSCH if CSI is reported in PUSCH.
[0110] In some example embodiments, the information comprises the second indication of the change of the device-to-device CLI measurement metric for an occasion. The first apparatus 110 may perform the measurement of the device-to-device CLI for the occasion based on a received signal strength indicator; and transmit a report at least including the measurement of the device-to-device CLI to the second apparatus 120. The second indication may be referred to as CLI (measurement) metric change indication or SRS absence and CLI metric change indication.
[0111] As part of the dynamic TDD standardization, 2 types of UE-to-UE cross-link interference measurements were standardized. One consists of measuring the RSRP of a SRS, also known as SRS-RSRP, and the other consists of measuring the RSSI of a given set of resources, also known as CLI-RSSI.
[0112] SRS reference signal received power (SRS-RSRP) is defined as linear average of the power contributions (in [W] ) of the resource elements carrying sounding reference signals (SRS) . SRS RSRP shall be measured over the configured resource elements within the considered measurement frequency bandwidth in the configured measurement time occasions.
[0113] For frequency range 1, the reference point for the SRS-RSRP shall be the antenna connector of the UE. For frequency range 2, SRS-RSRP shall be measured based on the combined signal from antenna elements corresponding to a given receiver branch. For frequency range 1 and 2, if receiver diversity is in use by the UE, the reported SRS-RSRP value shall not be lower than the corresponding SRS-RSRP of any of the individual receiver branches. SRS-RSRP measurement may be applicable for RRC_CONNECTED intra-frequency.
[0114] CLI-RSSI is defined as linear average of the total received power (in [W] ) observed only in the configured OFDM symbols of the configured measurement time resource (s) , in the configured measurement bandwidth from all sources, including co-channel serving and non-serving cells, adjacent channel interference, thermal noise etc.
[0115] For frequency range 1, the reference point for the RSSI shall be the antenna connector of the UE. For frequency range 2, CLI-RSSI shall be measured based on the combined signal from antenna elements corresponding to a given receiver branch. For frequency range 1 and 2, if receiver diversity is in use by the UE, the reported CLI-RSSI value shall not be lower than the corresponding CLI-RSSI of any of the individual receiver branches. CLI-RSSI may be applicable for RRC_CONNECTED intra-frequency.
[0116] As used herein, the second indication of the change of the device-to-device CLI measurement metric for an occasion may indicate to change the SRS-RSRP measurement metric to the CLI-RSSI measurement metric.
[0117] For example, if the SRS of the aggressor UE is not present, then the victim UE can’ t measure SRS-RSRP over those resources. Instead of skipping the CSI measurements / report as shown above, alternatively, the second apparatus 120 may indicate that the UE shall perform RSSI measurements over the same resources and continue with the reporting as usual. The UE should be aware of such change in advance, otherwise, it would use SRS-RSRP and no CLI will be measured. This will result in an inaccurate CSI report. CLI-RSSI measurements are possible to perform because they don’ t require the explicit transmission of any reference signal. This reporting indicates the second apparatus 120 the total CLI received at the victim UE (instead of the CLI of a particular UE) .
[0118] FIG. 7 illustrates an example diagram 700 of the indication of SRS absence and change of SRS-RSRP to CLI RSSI according to some example embodiments of the present disclosure. As shown, based on the indications 710 and 720 for SRS absence and CLI metric change, the reports at occasions 715 and 725 may include CLI-RSSI.
[0119] In some example embodiments, the information comprises the third indication of using a secondary resource instead of a primary resource for the device-to-device CLI measurement for an occasion. The first apparatus 110 may perform the measurement of the device-to-device CLI for the occasion based on the secondary resource; and transmit a report at least including the measurement of the device-to-device CLI to the second apparatus 120. For example, the primary resource may be a primary sounding reference signal from the third apparatus 130, and the secondary resource may include at least one of:a secondary sounding reference signal from a fourth apparatus such as the fourth apparatus 140 or other UE, or a resource for CLI RSSI. The third indication may be referred to as secondary CLI (measurement) resource indication or SRS absence and secondary CLI (measurement) resource indication.
[0120] That is, the victim UE may be configured with a primary and secondary CLI resources via RRC. The embodiment is to provide “resource diversity” to the UE. As default, the UE measures CLI using the primary resources (e.g., SRS resources from a specific aggressor UE) . In the event of a collision resulting in the absence of the SRS transmission, the second apparatus 120 may indicate the victim UE to measure the CLI using the secondary CLI resources. These secondary resources may be another SRS resources, or alternatively, CLI-RSSI resources.
[0121] FIG. 8 illustrates an example diagram 800 of an indication of SRS absence and indication of second CLI measurement resources according to some example embodiments of the present disclosure. As shown, based on the indications 810 and 820 for secondary (2nd) resource (s) such as CLI-RSSI or SRS from a further UE, the first apparatus 110 may perform the CLI measurement using CLI-RSSI. The indications 810 and 820 may be referred to as SRS absence and secondary CLI measurement indications. At occasions 815 and 825, the report may include CLI measurement based on the secondary resource.
[0122] In some example embodiments, if detects (570) the first collision for the first occasion, the second apparatus 120 may skip a transmission of a CSI-RS for the first occasion.
[0123] As described, based on the first collision, the second apparatus 120 may inform the third apparatus 130 such as the aggressor UE to skip the SRS transmission. For example, there may be cases in which the victim UE (such as, the first apparatus 110) is not able to perform the CSI measurements (as a result of collision handling) if, for instance, a dynamic UL grant points to the same slot / symbols of the CSI measurement. In this case, the SRS transmission of the aggressor UE won’ t be used, at least for this UE. If CLI measurements of this particular UE is the only purpose of the SRS transmission, then the second apparatus 120 shall indicate to skip the SRS transmission. This will save power to the aggressor UE (and avoid potential interference at NW, caused by the SRS transmission, for receiving the dynamic UL transmission) .
[0124] FIG. 9 illustrates an example diagram 900 of SRS cancellation due to collision handling resulting in CSI measurements skipping at the victim UE according to some example embodiments of the present disclosure. As shown, collisions 920 and 940 result in CSI skipping. SRS cancellation indications may be transmitted to the third apparatus 130. The SRS transmissions at occasions 910 and 930 may be skipped or cancelled.
[0125] As mentioned, in some example embodiments, the first apparatus 110 may receive the configuration of the threshold for determining reporting of the measurement of the device-to-device CLI. In such cases, the first apparatus 110 may perform the measurement of the device-to-device CLI based on a signal quality of a sounding reference signal. If the measured signal quality is less than the threshold, the first apparatus 110 may skip the measurement of device-to-device CLI.
[0126] In some example embodiments, if the measured signal quality is less than the threshold, the first apparatus 110 may skip a measurement of channel state information (CSI) ; and skip a report of the measurement of device-to-device CLI and the measurement of CSI. Alternatively, in some example embodiments, if the measured signal quality is less than the threshold, the first apparatus 110 may perform a measurement of CSI; and transmit a report of the measurement of CSI without the measurement of device-to-device CLI to the second apparatus 120. With this embodiment, dynamic indication by the second apparatus 120 is not required at the victim UE. Instead, the victim UE is configured with a threshold in RSRP. UE performs SRS-RSRP measurement regardless of whether the SRS is present or not, and the UE determines to skip or apply a partial report (without CLI) in case the SRS-RSRP is smaller than the threshold.
[0127] In some example embodiments, the first apparatus 110 may transmit, to the second apparatus 120, an indication of an absence of the measurement of device-to-device CLI in the report. For example, the first apparatus 110 may indicate the second apparatus 120 (e.g., using the most significant bit (MSB) or least significant bit (LSB) in the report, or other means) if the CLI has been “ignored” when preparing the CSI report. This is needed because the second apparatus 120 should ignore the bits in the UCI that refer to the CLI metrics, and / or understand that the other CSI metrics such as CQI or L1-SINR do not include the CLI component.
[0128] It is to be understood that in embodiments described with respect to FIGS. 5-9, the first apparatus 110 such as the victim UE may be one UE or one group UEs or all SBFD UEs or some specific UEs. The third apparatus 130 such as the aggressor UE may be one UE or one group UEs or all SBFD UEs or some specific UEs.
[0129] Group UEs may be grouped by SSB index, Beams, SBFD structures, etc. Specific UEs may be based on the status (e.g., discontinuous reception (DRX) , entended discontinuous reception (eDRX) ) or DL / UL buffer or DL / UL schedule. For example, some specific UEs have UL buffer, then they need to send the period SRS, otherwise, need not send period SRS. Some specific UEs have DL traffic and the measure slot have no UL sending, then they need to measure the CLI.
[0130] Several example embodiments regarding information regarding the CLI measurement and indication of skipping SRS transmission have been described. With these embodiments, the cases in which the collision handling results in an absence of SRS measurements (for CLI purposes) at the aggressor UE and cases in which the collision handling results in a skip of the CSI measurements at the victim UE can be improved. Further embodiments will be described with respect to FIG. 10 to FIG. 15. FIG. 10 to FIG. 15 will be described with respect to FIG. 1. For purpose of discussion, some example embodiments with respect to FIG. 10 to FIG. 15 are described where the first apparatus 110 is implemented as a victim UE, the second apparatus 120 is implemented as a network device and the third apparatus 130 is implemented as an aggressor UE. It is assumed that the second apparatus 120 is in full control of the scheduling decisions at both the aggressor and victim UEs.
[0131] FIG. 10 illustrates a signaling flow 1000 for CSI and CLI measurements and reporting skipping for measurement according to some example embodiments of the present disclosure.
[0132] The signaling flow 100 shows the case where the second apparatus 120 indicates (1010) the first apparatus 110 to not measure CSI+CLI at given measurement occasion and, additionally, indicate to not perform the reporting on the next reporting occasion. Note that these indications are independent. The first apparatus 110 skips (1030) the measurements and the reporting accordingly. The second apparatus 120 may indicate to not measure a specific measurement occasion even though the reporting still occurs (if CSI was obtained from previous measurement occasions) . As shown, the second apparatus 120 skips (1020) the CSI-RS. That is, the second apparatus 120 avoids sending the CSI-RS because it instructed the first apparatus 110 not to measure CSI+CLI. This is expected to save power to the gNB and UE.
[0133] FIG. 11 illustrates a signaling flow 1100 for CLI measurement skipping while CSI measurements and reporting are performed according to some example embodiments of the present disclosure. As shown, the second apparatus 120 may be still interested in getting the CSI experienced from the first apparatus 110. Thus, the second apparatus 120 only instructs (1110) the first apparatus 110 to not measure CLI. The first apparatus 110 receiving this new indication will not perform (1130) CLI measurements and not include information about it in the CSI report. This aspect will impact how the CSI report is constructed at the UE side. This indication may be via DCI.
[0134] FIG. 12 illustrates a signaling flow 1200 for CSI and CLI measurements with change in measurement metric according to some example embodiments of the present disclosure. As shown, the indication (1210) from the second apparatus 120 instructs the first apparatus 110 to use the same SRS resources for CLI measurements. However, the first apparatus 110 won’ t exclusively search for the presence of the SRS and measure RSRP. Instead, the first apparatus 110 will measure RSSI which doesn’ t require the presence of any specific signal. The first apparatus 110 may perform (1230) the CSI and CLI with RSSI measurements and report the measurements. With RSSI measurements simply the first apparatus 110 captures any signal that is being transmitted over those resources. The second apparatus 120 may find this information useful because it helps determining if other UEs are creating high UE-to-UE CLI. Moreover, it simply keeps the CLI reporting meaningful, otherwise, the SRS-RSRP won’ t give any information to the second apparatus 120. This indication may be via DCI.
[0135] FIG. 13 illustrates a signaling flow 1300 for CSI and CLI measurements performed using secondary CLI measurement resources according to some example embodiments of the present disclosure. The second apparatus may configure (1310) , for example, via RRC a secondary set of CLI measurement resources. For example, the configuration may be shown in Table 2 below. It is to be understood that the configuration shown in Table 2 is only for purpose of illustration, without suggesting any limitation. The parameters, values or formats shown in Table 2 may be varied.
[0136] Table 2
[0137] The UE such as the first apparatus 110 is expected to receive only one primary CLI resource indication and one or more CLI measurement resources which are secondary. If only one secondary resource, the second apparatus 120 uses 1-bit in the DCI to indicate (1320) the secondary resources. Otherwise, log2 (number_of_secondary_resources) bits are needed in the DCI. The first apparatus 110 may perform (1330) the CSI and CLI with the secondary resource and report the measurements.
[0138] FIG. 14 illustrates a signaling flow 1400 for UE autonomous determination of SRS presence and decision for partial of full CSI report according to some example embodiments of the present disclosure. As shown, the second apparatus 120 may configure (1410) via RRC an SRS-RSRP threshold which will be used at the first apparatus 110 to determine the presence of aggressor UE SRS transmission. For example, the configuration may be shown in Table 3 below. It is to be understood that the parameters, values or formats in the table are only for purpose of illustration, without suggesting any limitation. Any suitable parameter, value or format may be applied for the threshold.
[0139] Table 3
[0140] For each CLI measurement occasion, the first apparatus 110 will measure SRS-RSRP and compare the value against the minDetectabilityThreshold. If the measured SRS-RSRP is below the threshold, the first apparatus 110 may determine (1420) or assume that the SRS transmission was not present. The threshold may also be used for occasions where the SRS transmission is present, but the RSRP is so low that the first apparatus 110 decides to avoid reporting the metrics related to CLI. The first apparatus 110 may prepare (1430) full or partial CSI report depending on the presence of SRS. The first apparatus 110 may indicate (1440) if a partial CSI report is transmitted.
[0141] FIG. 15 illustrates a signaling flow 1500 for SRS skipping indication at aggressor UE according to some example embodiments of the present disclosure. In this case, the third apparatus 130 such as the aggressor UE is instructed to not perform a periodic SRS transmission on a given occasion due to a collision handling at the victim UE which results in CSI measurements skipping (1530) . That is, the second apparatus 120 may transmit (1510) an indication of skipping the SRS transmission to the third apparatus 130. The third apparatus may skip (1520) the SRS transmission. This may also imply that the second apparatus 120 avoids sending the CSI-RS because it knows that the victim UE can’ t make use of it. This indication may be via DCI.
[0142] It is to be understood that embodiments of the present disclosure are applicable to periodic, semi-persistent and aperiodic measurements and reporting. For aperiodic reporting, as currently supported in specs, the second apparatus 120 such as gNB indicates via a trigger state in the DCI which points to a specific measurement resources and reporting. The UE may receive the trigger and, additionally, one of the indications described above in case that the gNB has decided to: overrule a periodic SRS transmission with a dynamic DL; and / or to not trigger an aperiodic SRS transmission from the aggressor UE.
[0143] Under these cases, the UE may still receive a trigger state that indicates CSI plus CLI measurements but because the SRS won’ t be present, the gNB could additionally configure one of the options to handle the collision as explained above. Another alternative, which is currently possible, would be to simply configure and trigger an aperiodic CSI measurement that does not require any CLI measurements. However, there are cases where this may not be solved by configuration as shown in the following section.
[0144] Embodiments of the present disclosure can be applied to aperiodic CSI plus CLI measurements with collision handling. FIG. 16 illustrates a diagram 1600 of collision handing in aperiodic CSI and aperiodic SRS according to some example embodiments of the present disclosure. It is assumed here that the gNB wants the victim UE to perform an aperiodic CSI and CLI measurement. This requires an aperiodic SRS as well from the aggressor UE. A periodic SRS transmission may also be used.
[0145] The trigger state received by the victim UE may include CSI and CLI metrics. However, in between the activation of the aperiodic CSI and SRS transmissions, the aggressor UE has some high DL priority data to be served, for example at time instance 1610. This data is served over the slot where the aperiodic SRS was expected to be transmitted. That is, the PDSCH 1620 is prioritized over the SRS. The aggressor UE solves the collision by dropping the SRS and therefore the victim UE should be informed about that, for example, at T2 shown in FIG. 16. In this example, the UE is instructed to not perform any CLI measurements as part of the CSI. That is, an indication 1630 of only CSI measurements may be transmitted to the victim UE. The CSI measurements report 1640 is without CLI measurement. In this way, such case can be handled in the same manner as the periodic and semi-persistent cases.
[0146] Several example embodiments regarding indication of CLI measurement skipping, CLI reporting skipping, CLI measurement metric changing, CLI measurement resource changing, and / or SRS transmission skipping have been described. These embodiments can be applied separately, or in any combination. With these embodiments, the UE can adjust its measurements and reporting based on information or configuration from gNB, ensuring that accurate CSI reports are provided despite the presence of the aggressor UE's dynamic transmissions.
[0147] It is to be understood that although some example embodiments are described with a single aggressor such as the third apparatus 130, there may be one or more aggressor apparatuses in the environment. For example, the fourth apparatus 140 may also be an aggressor apparatus to the first apparatus 110. There may also be more than one victim apparatus with respect to the third apparatus 130. The number of the victim apparatus and the number of the aggressor apparatus are not limited.
[0148] FIG. 17 shows a flowchart of an example method 1700 implemented at a first apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 1700 will be described from the perspective of the first apparatus 110 in FIG. 1.
[0149] At block 1710, the first apparatus 110 receives, from a second apparatus, information comprising at least one of: a first indication of skipping a measurement of a device-to-device cross-link interference (CLI) , a second indication of a change of a device-to-device CLI measurement metric, a third indication of a resource for the device-to-device CLI measurement, or a configuration of a threshold for determining reporting of the measurement of the device-to-device CLI.
[0150] At block 1720, the first apparatus 110 performs, based on the information, one of: a skip of the measurement of device-to-device CLI, a skip of a reporting of the measurement of the device-to-device CLI, or the measurement of device-to-device CLI based on at least one of: the changed device-to-device CLI measurement metric, or the indicated resource for the device-to-device CLI. A transmission from the second apparatus to the first apparatus is in a resource configured for sub-band non-overlapping full-duplex (SBFD) .
[0151] In some example embodiments, the method 1700 further comprises: skipping the measurement of device-to-device CLI for the first occasion; skipping a measurement of channel state information (CSI) for the first occasion; and skipping a report of the measurement of device-to-device CLI and the measurement of CSI for the second occasion.
[0152] In some example embodiments, the method 1700 further comprises: skipping the measurement of device-to-device CLI for the first occasion; performing a measurement of channel state information (CSI) for the first occasion; and transmitting a report of the measurement of CSI without the measurement of device-to-device CLI to the second apparatus at a second occasion associated with the first occasion.
[0153] In some example embodiments, the method 1700 further comprises: performing the measurement of the device-to-device CLI for the occasion based on a received signal strength indicator; and transmitting a report at least including the measurement of the device-to-device CLI to the second apparatus.
[0154] In some example embodiments, the method 1700 further comprises: performing the measurement of the device-to-device CLI for the occasion based on the secondary resource; and transmitting a report at least including the measurement of the device-to-device CLI to the second apparatus.
[0155] In some example embodiments, the primary resource comprises a primary sounding reference signal from a third apparatus, and the secondary resource comprises at least one of: a secondary sounding reference signal from a fourth apparatus, or a resource for CLI received signal strength indicator.
[0156] In some example embodiments, the method 1700 further comprises: performing the measurement of the device-to-device CLI based on a signal quality of a sounding reference signal; and based on the measured signal quality being less than the threshold, skipping the measurement of device-to-device CLI.
[0157] In some example embodiments, the method 1700 further comprises: based on the measured signal quality being less than the threshold, skipping a measurement of channel state information (CSI) ; and skipping a report of the measurement of device-to-device CLI and the measurement of CSI.
[0158] In some example embodiments, the method 1700 further comprises: based on the measured signal quality being less than the threshold, performing a measurement of channel state information (CSI) ; and transmitting a report of the measurement of CSI without the measurement of device-to-device CLI to the second apparatus.
[0159] In some example embodiments, the method 1700 further comprises: transmitting, to the second apparatus, an indication of an absence of the measurement of device-to-device CLI in the report.
[0160] In some example embodiments, the information is received via at least one of: downlink control information, or a radio resource control message.
[0161] FIG. 18 shows a flowchart of an example method 1800 implemented at a second apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 1800 will be described from the perspective of the second apparatus 120 in FIG. 1.
[0162] At block 1810, the second apparatus 120 transmits, to at least a first apparatus, a configuration of a threshold for determining reporting of a measurement of a device-to-device cross-link interference (CLI) .
[0163] At block 1820, based on a first collision resulting in a skip of a channel state information measurement of the first apparatus for a first occasion, the second apparatus 120 transmits to a third apparatus, an indication of skipping a transmission of a sounding reference signal for the first occasion.
[0164] At block 1830, based on a second collision resulting in a skip of a sounding reference signal transmission of a third apparatus on a second occasion, the second apparatus 120 transmits to the first apparatus, information regarding a measurement of a device-to-device CLI.
[0165] In some example embodiments, the information regarding the measurement of the device-to-device CLI comprises at least one of: a first indication of skipping a measurement of a device-to-device cross-link interference (CLI) for the second occasion, a second indication of a change of a device-to-device CLI measurement metric for the second occasion, or a third indication of a resource for the device-to-device CLI measurement for the second occasion.
[0166] In some example embodiments, the method 1800 further comprises: skipping a transmission of a channel state information (CSI) reference signal (RS) for the second occasion.
[0167] In some example embodiments, the primary resource comprises a primary sounding reference signal from the third apparatus, and the secondary resource comprises at least one of: a secondary sounding reference signal from a fourth apparatus, or a resource for CLI received signal strength indicator.
[0168] In some example embodiments, the method 1800 further comprises: receiving, from the first apparatus, a report of a measurement of channel state information (CSI) without the measurement of device-to-device CLI at a third occasion associated with the second occasion.
[0169] In some example embodiments, the method 1800 further comprises: receiving, from the first apparatus, an indication of an absence of the measurement of device-to-device CLI in the report of the measurement of CSI.
[0170] In some example embodiments, the method 1800 further comprises: based on the first collision, skipping a transmission of a channel state information (CSI) reference signal (RS) for the first occasion.
[0171] In some example embodiments, a transmission from the second apparatus to the first apparatus and a transmission from the third apparatus to the second apparatus is sub-band non-overlapping full-duplex (SBFD) .
[0172] In some example embodiments, a first apparatus capable of performing any of the method 1700 (for example, the first apparatus 110 in FIG. 1) may comprise means for performing the respective operations of the method 1700. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module. The first apparatus may be implemented as or included in the first apparatus 110 in FIG. 1.
[0173] In some example embodiments, the first apparatus comprises means for receiving, from a second apparatus, information comprising at least one of: a first indication of skipping a measurement of a device-to-device cross-link interference (CLI) , a second indication of a change of a device-to-device CLI measurement metric, a third indication of a resource for the device-to-device CLI measurement, or a configuration of a threshold for determining reporting of the measurement of the device-to-device CLI; and means for performing, based on the information, one of: a skip of the measurement of device-to- device CLI; a skip of a reporting of the measurement of the device-to-device CLI; or the measurement of device-to-device CLI based on at least one of: the changed device-to-device CLI measurement metric, or the indicated resource for the device-to-device CLI, wherein a transmission from the second apparatus to the first apparatus is in a resource configured for sub-band non-overlapping full-duplex (SBFD) .
[0174] In some example embodiments, the first apparatus further comprises: means for skipping the measurement of device-to-device CLI for the first occasion; means for skipping a measurement of channel state information (CSI) for the first occasion; and means for skipping a report of the measurement of device-to-device CLI and the measurement of CSI for the second occasion.
[0175] In some example embodiments, the first apparatus further comprises: means for skipping the measurement of device-to-device CLI for the first occasion; means for performing a measurement of channel state information (CSI) for the first occasion; and means for transmitting a report of the measurement of CSI without the measurement of device-to-device CLI to the second apparatus at a second occasion associated with the first occasion.
[0176] In some example embodiments, the first apparatus further comprises: means for performing the measurement of the device-to-device CLI for the occasion based on a received signal strength indicator; and means for transmitting a report at least including the measurement of the device-to-device CLI to the second apparatus.
[0177] In some example embodiments, the first apparatus further comprises: means for performing the measurement of the device-to-device CLI for the occasion based on the secondary resource; and means for transmitting a report at least including the measurement of the device-to-device CLI to the second apparatus.
[0178] In some example embodiments, the primary resource comprises a primary sounding reference signal from a third apparatus, and the secondary resource comprises at least one of: a secondary sounding reference signal from a fourth apparatus, or a resource for CLI received signal strength indicator.
[0179] In some example embodiments, the first apparatus further comprises: means for performing the measurement of the device-to-device CLI based on a signal quality of a sounding reference signal; and means for based on the measured signal quality being less than the threshold, skipping the measurement of device-to-device CLI.
[0180] In some example embodiments, the first apparatus further comprises: based on the measured signal quality being less than the threshold, means for skipping a measurement of channel state information (CSI) ; and means for skipping a report of the measurement of device-to-device CLI and the measurement of CSI.
[0181] In some example embodiments, the first apparatus further comprises: based on the measured signal quality being less than the threshold, means for performing a measurement of channel state information (CSI) ; and means for transmitting a report of the measurement of CSI without the measurement of device-to-device CLI to the second apparatus.
[0182] In some example embodiments, the first apparatus further comprises: means for transmitting, to the second apparatus, an indication of an absence of the measurement of device-to-device CLI in the report.
[0183] In some example embodiments, the information is received via at least one of: downlink control information, or a radio resource control message.
[0184] In some example embodiments, a second apparatus capable of performing any of the method 1800 (for example, the second apparatus 120 in FIG. 1) may comprise means for performing the respective operations of the method 1800. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module. The second apparatus may be implemented as or included in the second apparatus 120 in FIG. 1.
[0185] In some example embodiments, the second apparatus comprises means for transmitting, to at least a first apparatus, a configuration of a threshold for determining reporting of a measurement of a device-to-device cross-link interference (CLI) ; means for based on a first collision resulting in a skip of a channel state information measurement of the first apparatus for a first occasion, transmitting to a third apparatus, an indication of skipping a transmission of a sounding reference signal for the first occasion; or means for based on a second collision resulting in a skip of a sounding reference signal transmission of a third apparatus on a second occasion, transmitting to the first apparatus, information regarding a measurement of a device-to-device CLI.
[0186] In some example embodiments, the information regarding the measurement of the device-to-device CLI comprises at least one of: a first indication of skipping a measurement of a device-to-device cross-link interference (CLI) for the second occasion, a second indication of a change of a device-to-device CLI measurement metric for the second occasion, or a third indication of a resource for the device-to-device CLI measurement for the second occasion.
[0187] In some example embodiments, the second apparatus further comprises: means for skipping a transmission of a channel state information (CSI) reference signal (RS) for the second occasion.
[0188] In some example embodiments, the primary resource comprises a primary sounding reference signal from the third apparatus, and the secondary resource comprises at least one of: a secondary sounding reference signal from a fourth apparatus, or a resource for CLI received signal strength indicator.
[0189] In some example embodiments, the second apparatus further comprises: means for receiving, from the first apparatus, a report of a measurement of channel state information (CSI) without the measurement of device-to-device CLI at a third occasion associated with the second occasion.
[0190] In some example embodiments, the second apparatus further comprises: means for receiving, from the first apparatus, an indication of an absence of the measurement of device-to-device CLI in the report of the measurement of CSI.
[0191] In some example embodiments, the second apparatus further comprises: means for based on the first collision, skipping a transmission of a channel state information (CSI) reference signal (RS) for the first occasion.
[0192] In some example embodiments, a transmission from the second apparatus to the first apparatus and a transmission from the third apparatus to the second apparatus is sub-band non-overlapping full-duplex (SBFD) .
[0193] FIG. 19 is a simplified block diagram of a device 1900 that is suitable for implementing example embodiments of the present disclosure. The device 1900 may be provided to implement a communication device, for example, the first apparatus 110 or the second apparatus 120 as shown in FIG. 1. As shown, the device 1900 includes one or more processors 1910, one or more memories 1920 coupled to the processor 1910, and one or more communication modules 1940 coupled to the processor 1910.
[0194] The communication module 1940 is for bidirectional communications. The communication module 1940 has one or more communication interfaces to facilitate communication with one or more other modules or devices. The communication interfaces may represent any interface that is necessary for communication with other network elements. In some example embodiments, the communication module 1940 may include at least one antenna.
[0195] The processor 1910 may be of any type suitable to the local technical network and may include one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 1900 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
[0196] The memory 1920 may include one or more non-volatile memories and one or more volatile memories. Examples of the non-volatile memories include, but are not limited to, a Read Only Memory (ROM) 1924, an electrically programmable read only memory (EPROM) , a flash memory, a hard disk, a compact disc (CD) , a digital video disk (DVD) , an optical disk, a laser disk, and other magnetic storage and / or optical storage. Examples of the volatile memories include, but are not limited to, a random-access memory (RAM) 1922 and other volatile memories that will not last in the power-down duration.
[0197] A computer program 1930 includes computer executable instructions that are executed by the associated processor 1910. The instructions of the program 1930 may include instructions for performing operations / acts of some example embodiments of the present disclosure. The program 1930 may be stored in the memory, e.g., the ROM 1924. The processor 1910 may perform any suitable actions and processing by loading the program 1930 into the RAM 1922.
[0198] The example embodiments of the present disclosure may be implemented by means of the program 1930 so that the device 1900 may perform any process of the disclosure as discussed with reference to FIG. 5 to FIG. 18. The example embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
[0199] In some example embodiments, the program 1930 may be tangibly contained in a computer readable medium which may be included in the device 1900 (such as in the memory 1920) or other storage devices that are accessible by the device 1900. The device 1900 may load the program 1930 from the computer readable medium to the RAM 1922 for execution. In some example embodiments, the computer readable medium may include any types of non-transitory storage medium, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like. The term “non-transitory, ” as used herein, is a limitation of the medium itself (i.e., tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM vs. ROM) .
[0200] FIG. 20 shows an example of the computer readable medium 2000 which may be in form of CD, DVD or other optical storage disk. The computer readable medium 2000 has the program 1930 stored thereon.
[0201] Generally, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, and other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. Although various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representations, it is to be understood that the block, apparatus, system, technique or method described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
[0202] Some example embodiments of the present disclosure also provide at least one computer program product tangibly stored on a computer readable medium, such as a non-transitory computer readable medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target physical or virtual processor, to carry out any of the methods as described above. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
[0203] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. The program code may be provided to a processor or controller of a general-purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program code, when executed by the processor or controller, cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
[0204] In the context of the present disclosure, the computer program code or related data may be carried by any suitable carrier to enable the device, apparatus or processor to perform various processes and operations as described above. Examples of the carrier include a signal, computer readable medium, and the like.
[0205] The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random-access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
[0206] Further, although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, although several specific implementation details are contained in the above discussions, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Unless explicitly stated, certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, unless explicitly stated, various features that are described in the context of a single embodiment may also be implemented in a plurality of embodiments separately or in any suitable sub-combination.
[0207] Although the present disclosure has been described in languages specific to structural features and / or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims
1.A first apparatus comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus to:receive, from a second apparatus, information comprising at least one of:a first indication of skipping a measurement of a device-to-device cross-link interference (CLI) ,a second indication of a change of a device-to-device CLI measurement metric,a third indication of a resource for the device-to-device CLI measurement, ora configuration of a threshold for determining reporting of the measurement of the device-to-device CLI; andperform, based on the information, one of:a skip of the measurement of device-to-device CLI;a skip of a reporting of the measurement of the device-to-device CLI; orthe measurement of device-to-device CLI based on at least one of: the changed device-to-device CLI measurement metric, or the indicated resource for the device-to-device CLI,wherein a transmission from the second apparatus to the first apparatus is in a resource configured for sub-band non-overlapping full-duplex (SBFD) .2.The first apparatus of claim 1, wherein the information comprises the first indication of skipping the measurement of device-to-device CLI for a first occasion and skipping a measurement report for a second occasion associated with the first occasion, and the first apparatus is caused to:skip the measurement of device-to-device CLI for the first occasion;skip a measurement of channel state information (CSI) for the first occasion; andskip a report of the measurement of device-to-device CLI and the measurement of CSI for the second occasion.3.The first apparatus of claim 1, wherein the information comprises the first indication of skipping the measurement of device-to-device CLI for a first occasion, and the first apparatus is caused to:skip the measurement of device-to-device CLI for the first occasion;perform a measurement of channel state information (CSI) for the first occasion; andtransmit a report of the measurement of CSI without the measurement of device-to-device CLI to the second apparatus at a second occasion associated with the first occasion.4.The first apparatus of claim 1, wherein the information comprises the second indication of the change of the device-to-device CLI measurement metric for an occasion, and the first apparatus is caused to:perform the measurement of the device-to-device CLI for the occasion based on a received signal strength indicator; andtransmit a report at least including the measurement of the device-to-device CLI to the second apparatus.5.The first apparatus of claim 1, wherein the information comprises the third indication of using a secondary resource instead of a primary resource for the device-to-device CLI measurement for an occasion, and the first apparatus is caused to:perform the measurement of the device-to-device CLI for the occasion based on the secondary resource; andtransmit a report at least including the measurement of the device-to-device CLI to the second apparatus.6.The first apparatus of claim 5, wherein the primary resource comprises a primary sounding reference signal from a third apparatus, and the secondary resource comprises at least one of: a secondary sounding reference signal from a fourth apparatus, or a resource for CLI received signal strength indicator.7.The first apparatus of claim 1, wherein the information comprises the configuration of the threshold for determining reporting of the measurement of the device-to-device CLI, and the first apparatus is caused to:perform the measurement of the device-to-device CLI based on a signal quality of a sounding reference signal; andbased on the measured signal quality being less than the threshold, skip the measurement of device-to-device CLI.8.The first apparatus of claim 7, wherein the first apparatus is further caused to: based on the measured signal quality being less than the threshold,skip a measurement of channel state information (CSI) ; andskip a report of the measurement of device-to-device CLI and the measurement of CSI.9.The first apparatus of claim 7, wherein the first apparatus is further caused to: based on the measured signal quality being less than the threshold,perform a measurement of channel state information (CSI) ; andtransmit a report of the measurement of CSI without the measurement of device-to-device CLI to the second apparatus.10.The first apparatus of claim 3 or 9, wherein the first apparatus is further caused to:transmit, to the second apparatus, an indication of an absence of the measurement of device-to-device CLI in the report.11.The first apparatus of any of claims 1-10, wherein the information is received via at least one of: downlink control information, or a radio resource control message.12.A second apparatus comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the second apparatus to perform at least one of:transmitting, to at least a first apparatus, a configuration of a threshold for determining reporting of a measurement of a device-to-device cross-link interference (CLI) ;based on a first collision resulting in a skip of a channel state information measurement of the first apparatus for a first occasion, transmitting, to a third apparatus, an indication of skipping a transmission of a sounding reference signal for the first occasion; orbased on a second collision resulting in a skip of a sounding reference signal transmission of a third apparatus on a second occasion, transmitting, to the first apparatus, information regarding a measurement of a device-to-device CLI.13.The second apparatus of claim 12, wherein the information regarding the measurement of the device-to-device CLI comprises at least one of:a first indication of skipping a measurement of a device-to-device cross-link interference (CLI) for the second occasion,a second indication of a change of a device-to-device CLI measurement metric for the second occasion, ora third indication of a resource for the device-to-device CLI measurement for the second occasion.14.The second apparatus of claim 13, wherein the first indication further indicates to skip a measurement reporting for a third occasion associated with the second occasion, and the second apparatus is further caused to:skip a transmission of a channel state information (CSI) reference signal (RS) for the second occasion.15.The second apparatus of claim 13, wherein the primary resource comprises a primary sounding reference signal from the third apparatus, and the secondary resource comprises at least one of: a secondary sounding reference signal from a fourth apparatus, or a resource for CLI received signal strength indicator.16.The second apparatus of claim 13, wherein the second apparatus is further caused to:receive, from the first apparatus, a report of a measurement of channel state information (CSI) without the measurement of device-to-device CLI at a third occasion associated with the second occasion.17.The second apparatus of claim 16, wherein the second apparatus is further caused to:receive, from the first apparatus, an indication of an absence of the measurement of device-to-device CLI in the report of the measurement of CSI.18.The second apparatus of any of claims 12-17, wherein the second apparatus is caused to:based on the first collision, skip a transmission of a channel state information (CSI) reference signal (RS) for the first occasion.19.The second apparatus of any of claims 12-18, wherein a transmission from the second apparatus to the first apparatus and a transmission from the third apparatus to the second apparatus is sub-band non-overlapping full-duplex (SBFD) .20.A method comprising:receiving, at a first apparatus from a second apparatus, information comprising at least one of:a first indication of skipping a measurement of a device-to-device cross-link interference (CLI) ,a second indication of a change of a device-to-device CLI measurement metric,a third indication of a resource for the device-to-device CLI measurement, ora configuration of a threshold for determining reporting of the measurement of the device-to-device CLI; andperforming, based on the information, one of:a skip of the measurement of device-to-device CLI.a skip of a reporting of the measurement of the device-to-device CLI, orthe measurement of device-to-device CLI based on at least one of: the changed device-to-device CLI measurement metric, or the indicated resource for the device-to-device CLI,wherein a transmission from the second apparatus to the first apparatus is in a resource configured for sub-band non-overlapping full-duplex (SBFD) .21.A method comprising at least one of:transmitting, at a second apparatus to at least a first apparatus, a configuration of a threshold for determining reporting of a measurement of a device-to-device cross-link interference (CLI) ;based on a first collision resulting in a skip of a channel state information measurement of the first apparatus for a first occasion, transmitting to a third apparatus, an indication of skipping a transmission of a sounding reference signal for the first occasion; orbased on a second collision resulting in a skip of a sounding reference signal transmission of a third apparatus on a second occasion, transmitting to the first apparatus, information regarding a measurement of a device-to-device CLI.22.A first apparatus comprising:means for receiving, from a second apparatus, information comprising at least one of:a first indication of skipping a measurement of a device-to-device cross-link interference (CLI) ,a second indication of a change of a device-to-device CLI measurement metric,a third indication of a resource for the device-to-device CLI measurement, ora configuration of a threshold for determining reporting of the measurement of the device-to-device CLI; andmeans for performing, based on the information, one of:a skip of the measurement of device-to-device CLI;a skip of a reporting of the measurement of the device-to-device CLI; orthe measurement of device-to-device CLI based on at least one of: the changed device-to-device CLI measurement metric, or the indicated resource for the device-to-device CLI,wherein a transmission from the second apparatus to the first apparatus is in a resource configured for sub-band non-overlapping full-duplex (SBFD) .23.A second apparatus comprising:means for transmitting, to at least a first apparatus, a configuration of a threshold for determining reporting of a measurement of a device-to-device cross-link interference (CLI) ;means for based on a first collision resulting in a skip of a channel state information measurement of the first apparatus for a first occasion, transmitting to a third apparatus, an indication of skipping a transmission of a sounding reference signal for the first occasion; ormeans for based on a second collision resulting in a skip of a sounding reference signal transmission of a third apparatus on a second occasion, transmitting to the first apparatus, information regarding a measurement of a device-to-device CLI.24.A computer readable medium comprising instructions stored thereon for causing an apparatus at least to perform the method of claim 20 or the method of claim 21.
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