Timing adjustment for measurement
By aligning receiving timings through network-assisted timing adjustments, accurate UE-to-UE CLI measurements are achieved, addressing the CLI challenges in SBFD operations and enhancing DL throughput for UEs.
Patent Information
- Application Number
- PCT/CN2024/076179
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-02-05
- Publication Date
- 2025-08-14
AI Technical Summary
In 5G NR systems with sub-band non-overlapping full duplex (SBFD) operation, cross-link interferences (CLI) pose challenges for accurate UE-to-UE CLI measurements, leading to reduced DL throughput, especially for cell-edge UEs, due to misaligned receiving timings.
A network device transmits timing adjustment information to a terminal device, allowing it to adjust the receiving timing of reference signals from another terminal device, enabling more accurate CLI measurements by aligning the receiving timings for improved SBFD operations.
This approach enhances the accuracy of CLI measurements, enabling better CLI mitigation strategies and improving DL throughput for UEs in SBFD environments.
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Figure CN2024076179_14082025_PF_FP_ABST
Abstract
Description
TIMING ADJUSTMENT FOR MEASUREMENT
[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 timing adjustment for measurement.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 at least to: receive, from a second apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus; determine the receiving timing of the reference signal; adjust the receiving timing of the reference signal based on the information; and perform at least one measurement of the reference signal based on the adjusted receiving timing.
[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 at least to: transmit, to a first apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus; and receive, from the first apparatus, at least one measurement result of at least one measurement of the reference signal, the at least one measurement being performed by the first apparatus based on the adjusted receiving timing of the reference signal.
[0006] In a third aspect of the present disclosure, there is provided a method. The method comprises: receiving, at a first apparatus from a second apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus; determining the receiving timing of the reference signal; adjusting the receiving timing of the reference signal based on the information; and performing at least one measurement of the reference signal based on the adjusted receiving timing.
[0007] In a fourth aspect of the present disclosure, there is provided a method. The method comprises: transmitting, at a second apparatus to a first apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus; and receiving, from the first apparatus, at least one measurement result of at least one measurement of the reference signal, the at least one measurement being performed by the first apparatus based on the adjusted receiving timing of the reference signal.
[0008] In a fifth aspect of the present disclosure, there is provided an apparatus. The first apparatus comprises means for receiving, from a second apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus; means for determining the receiving timing of the reference signal; means for adjusting the receiving timing of the reference signal based on the information; and means for performing at least one measurement of the reference signal based on the adjusted receiving timing.
[0009] In a sixth aspect of the present disclosure, there is provided an apparatus. The first apparatus comprises means for transmitting, to a first apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus; and means for receiving, from the first apparatus, at least one measurement result of at least one measurement of the reference signal, the at least one measurement being performed by the first apparatus based on the adjusted receiving timing of the reference signal.
[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. 3C illustrates an example of user equipment (UE) -to-UE demodulation reference signal (DMRS) CLI measurement timing;
[0021] FIG. 4 illustrates a signaling flow for timing adjustment for measurement according to some example embodiments of the present disclosure;
[0022] FIG. 5 illustrates an example diagram of UE-to-UE CLI in intra-cell according to some example embodiments of the present disclosure;
[0023] FIG. 6A illustrates an example of timing adjustment for UEs in different beams according to some example embodiments of the present disclosure;
[0024] FIG. 6B illustrates an example of timing adjustment for UEs in a same beam according to some example embodiments of the present disclosure;
[0025] FIG. 6C illustrates another example of timing adjustment for UEs in a same beam according to some example embodiments of the present disclosure;
[0026] FIG. 7 illustrates timing adjustment for UE level and cell level according to some example embodiments of the present disclosure;
[0027] FIG. 8 illustrates a flowchart of a method implemented at a first apparatus according to some example embodiments of the present disclosure;
[0028] FIG. 9 illustrates a flowchart of a method implemented at a second apparatus according to some example embodiments of the present disclosure;
[0029] FIG. 10 illustrates a simplified block diagram of a device that is suitable for implementing example embodiments of the present disclosure; and
[0030] FIG. 11 illustrates a block diagram of an example computer readable medium in accordance with some example embodiments of the present disclosure.
[0031] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0032] 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.
[0033] 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.
[0034] 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.
[0035] 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.
[0036] 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.
[0037] 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.
[0038] 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.
[0039] As used in this application, the term “circuitry” may refer to one or more or all of the following:
[0040] (a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) and
[0041] (b) combinations of hardware circuits and software, such as (as applicable) :
[0042] (i) a combination of analog and / or digital hardware circuit (s) with software / firmware and
[0043] (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
[0044] (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.
[0045] 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.
[0046] 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.
[0047] 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.
[0048] 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.
[0049] 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.
[0050] 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) .
[0051] Principle 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.
[0052] 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.
[0053] 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) , while 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) .
[0054] 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” .
[0055] 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.
[0056] 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 while 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.
[0057] 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.
[0058] 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.
[0059] In addition, for purpose of illustration, some example embodiments are described with the first apparatus 110 operating as a victim UE or listening UE while 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.
[0060] 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.
[0061] 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.
[0062] 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.
[0063] 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.
[0064] 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.
[0065] 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 however has 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.
[0066] 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.
[0067] 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.
[0068] 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.
[0069] 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.
[0070] 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 transmitting in 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.
[0071] 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.
[0072] In some mechanisms, the UE may adjust its downlink reference timing to perform the CLI measurement. For example, the UE capable of performing CLI measurements shall be able to measure sounding reference signal (SRS) reference signal received power (RSRP) and CLI received signal strength indicator (RSSI) within active DL bandwidth part (BWP) . However, the measurements requirements apply for TDD mode only. Such CLI measurements are only applicable for RRC_CONNECTED intra frequency: when SRS-RSRP measurement resource is fully confined within BW of DL active BWP, and / or when CLI-RSSI measurement resource is configured within active BWP. When the UE measure SRS-RSRP and CLI-RSRP, a constant offset relative to the downlink reference timing in the serving cell shall be applied. The constant offset value is derived by UE implementation and shall be at least Tc*NTA_offset.
[0073] In some mechanisms, for dynamic TDD, UE timing adjustments for measuring the UE-to-UE CLI is left for UE implementation. The focus of Release 16 was on inter-cell UE-to-UE CLI and therefore it is difficult to confirm or derive the UE-to-UE timing as it required additional inter-cell signaling. However, in SBFD, due to the simultaneous transmission and reception at the gNB, the UE-to-UE CLI issue may occur as well between UEs served by the same cell. For this type of interference, the measurement timing may be assisted by the gNB.
[0074] FIG. 3C illustrates an example of UE-to-UE demodulation reference signal (DMRS) CLI measurement timing. FIG. 3C shows the gNB timing 370 and the UEs timing 380. In the description with respect to FIG. 3C, it is assumed that UE1 is transmitting in UL and therefore is considered as an “aggressor UE” (from a CLI point of view) . In the vicinity of UE1, UE2 is receiving in DL and therefore is considered as “victim UE” . UE3 and UE4 are also considered as victim UEs, but due to the large distances between UE3 / UE4 and UE1, CLI may be expected to not play a big role.
[0075] FIG. 3C illustrates the UE-to-UE CLI measurement timing issue, for example for DMRS RSRP measurements. It is to be understood that if an SRS or any other suitable reference signal (RS) is used for CLI measurement purposes, a similar measurement timing issue may occur.
[0076] Due to proximity between UE1 and UE2, the aggressor UE Tx timing is not aligned with the (intra-cell) victim UE reception time. For example, the victim UE2 is close to aggressor UE1. However, the actual DL Rx timing of the victim UE depends on the propagation delay between itself and its serving cell. If not adjusting the UE2 DL Rx timing, several issues may happen. One issue may be that the UL DMRS transmitted at symbol#0 is missed at the UE2 and therefore accurate RSRP CLI measurement cannot be performed.
[0077] Similar issue may apply to the UL DMRS transmitted at symbol#6. The victim UE would not accurately measure the RSRP CLI conducted at its symbol #6. As depicted in Fig. 3C, the measurements should be conducted in symbol#5 instead, i.e., a timing offset with respect to the victim UE Rx timing should be applied.
[0078] This measurement misalignment might imply that the reported RSRP CLI measurement concludes that there is no CLI problem in situations where CLI is actually an issue. Similar problem occurs for UE3 and UE4.
[0079] In order to solve at least part of the above problems or other potential problems, according to the present solution on timing adjustment for measurement in SBFD, a second apparatus (for example, a network device) transmits, to a first apparatus (for example, a terminal device) , information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus (for example, another terminal device) . The first apparatus determines the receiving timing of the reference signal. The first apparatus adjusts the receiving timing of the reference signal based on the information. The first apparatus performs at least one measurement of the reference signal based on the adjusted receiving timing. In this way, a more accurate measurement of the reference signal can be achieved. The first apparatus may transmit at least one measurement result of the at least one measurement to the second apparatus. The second apparatus thus may obtain a more accurate condition of the CLI between the first apparatus and the third apparatus. In embodiments where the first and third apparatuses are in SBFD, such improved measurement can help improve the SBFD operations.
[0080] FIG. 4 illustrates a signaling flow 400 for timing adjustment in SBFD according to some example embodiments of the present disclosure. The signaling flow 400 involves the first apparatus 110 and the second apparatus 120 in FIG. 1. For purpose of illustration, the signaling flow 400 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 terminal device and the second apparatus 120 is implemented as a network device.
[0081] It is assumed that in the signaling flow 400, an SBFD mode is enabled or initiated. For example, the second apparatus 120 may transmit (410) SBFD configuration to the first apparatus 110. The first apparatus 110 may receive (415) 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.
[0082] By way of example, the SBFD configuration may include but 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 CLI RSSI 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.
[0083] In operation, the second apparatus 120 transmits (440) information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus 130. The first apparatus 110 receives (445) the information. By way of example, the information may be via downlink control information (DCI) , medium access control (MAC) control element (CE) , or any other suitable signaling or message. As used herein, the information regarding the timing adjustment may also be referred to as “timing adjustment information” .
[0084] It is to be understood that in some example embodiments, the second apparatus 120 may transmit a set of information regarding timing adjustments of a plurality of receiving timing of a plurality of reference signals from a plurality of apparatuses. Each information may be associated with a corresponding apparatus (such as a corresponding aggressor apparatus) . The set of information may be transmitted in combination, or separately.
[0085] In some example embodiments, it is assumed that in a certain time duration such as one or more SBFD slots, the third apparatus 130 transmits an uplink transmission to the second apparatus 120, while the first apparatus 110 receives a downlink transmission from the second apparatus 120. That is, a transmission from the second apparatus 120 to the first apparatus 110 and a transmission from the third apparatus 130 to the second apparatus 120 may be SBFD in these SBFD slots. Alternatively, in some example embodiments, it may assume that the third apparatus 130 transmits an uplink transmission to the second apparatus 120 while the first apparatus 110 does not perform any DL reception or UL transmission.
[0086] In some example embodiments, the reference signal from the third apparatus 130 may be DMRS, SRS, or any other suitable reference signal. For the purpose of illustration, some example embodiments will be described with the reference signal from the third apparatus 130 being the DMRS.
[0087] The first apparatus 110 determines (450) the receiving timing of the reference signal from the third apparatus 130. The first apparatus 110 adjusts (460) the receiving timing of the reference signal based on the information received (445) from the second apparatus 120.
[0088] Based on the adjusted receiving timing of the reference signal, the first apparatus 110 performs (465) at least one measurement of the reference signal. For example, the first apparatus 110 may measure RSRP or other signal quality of the reference signal such as the DMRS from the third apparatus 130. In this way, the measurement such as the intra-cell UE-to-UE co-channel inter-subband CLI measurements can be improved.
[0089] Alternatively, or in addition, in some example embodiments, the first apparatus 110 may measure SRS RSRP of the third apparatus 130. SRS-RSRP is defined as linear average of the power contributions (in [watt (W) ] ) of the resource elements carrying SRS (s) . SRS RSRP shall be measured over the configured resource elements within the considered measurement frequency bandwidth in the configured measurement time occasions.
[0090] For frequency range 1, the reference point for the SRS-RSRP shall be the antenna connector of the first apparatus 110. 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 first apparatus 110, the reported SRS-RSRP value shall not be lower than the corresponding SRS-RSRP of any of the individual receiver branches. The SRS RSRP measurement may be applicable for RRC_CONNECTED intra-frequency.
[0091] The first apparatus 110 may transmit (470) at least one measurement result of the at least one measurement to the second apparatus 120. The second apparatus 120 receives (475) the at least one measurement result. For example, the victim SBFD aware UE (s) may report CLI based on the DMRS RSRP or SRS RSRP. With the accurate measurement result, the second apparatus 120 can be aware of the CLI condition between apparatuses. For example, the network node can be aware of the UL CLI condition between UEs in the SBFD mode. The network node thus can apply proper CLI mitigation schemes. The SBFD operations thus can be improved.
[0092] As described, the second apparatus 120 informs the information regarding the timing adjustment to the first apparatus 110. In some example embodiments, the information may include a value of the timing adjustment. As used herein, the term “value of the timing adjustment” may be referred to as a “timing adjustment value” or “timing offset value” . The first apparatus 110 may simply apply the value to adjust (460) the receiving timing of the reference signal. In such cases, the value of the timing adjustment may be determined (435) by the second apparatus 120. Details regarding the determination of the value of the timing adjustment will be described with respect to FIG. 5 and FIG. 6A to FIG. 6C.
[0093] Alternatively, or in addition, in some example embodiments, the information may not include the timing adjustment value. Instead, the information may include other parameters or values for determining the timing adjustment value. The first apparatus 110 may determine (455) the value based on the information.
[0094] In some example embodiments, the information may include a first timing advance (TA) value of the third apparatus 130 relative to the second apparatus 120. For example, the first TA value may be a value configured by the second apparatus 120 for the third apparatus 130 to adjust the timing difference between the second apparatus 120 and the third apparatus 130. As used herein, the first TA value may be referred to as the TA value of the third apparatus 130. In some example embodiments, the information may include a second timing advance value for a communication between the first apparatus 110 and the second apparatus 120. As used herein, the second TA value may be referred to as the TA value of the first apparatus 110.
[0095] The first apparatus 110 may determine (455) the value based at least in part on at least one of: the first timing advance value, or the second timing advance value. By way of example, if the first apparatus 110 is further away from the second apparatus 120 such as a serving cell of the second apparatus, the first apparatus 110 may determine the first timing advance value of the third apparatus 130 as the timing adjustment value. For another example, if the third apparatus 130 is further away from the serving cell of the second apparatus 120, the first apparatus 110 may determine the second timing advance value as the timing adjustment value.
[0096] In some example embodiments, the information may further include an angle difference between a first beam associated with the first apparatus 110 and the second apparatus 120 and a second beam associated with the second apparatus 120 and the third apparatus 130. For example, the first beam may be a beam from the second apparatus 120 towards the first apparatus 110, and the second beam may be a beam from the second apparatus 120 towards the third apparatus 130. Alternatively, in another example, the first beam may be a beam from the first apparatus 110 towards the second apparatus 120, and the second beam may be a beam from the third apparatus 130 towards the second apparatus 120.
[0097] As used herein, the first beam associated with the first apparatus 110 and the second apparatus 120 may also be referred to as a beam of the first apparatus 110, and the second beam associated with the second apparatus 120 and the third apparatus 130 may also be referred to as the beam of the third apparatus 130. In the following description, for purpose of illustration, some embodiments are described with the first beam being the beam from the second apparatus 120 towards the first apparatus 110 and the second beam being the beam from the second apparatus 120 towards the third apparatus 130.
[0098] Alternatively, in some example embodiments, the information may include beam information of the second beam. For example, the beam information of the second beam may be a beam index of the second beam or angle information of the second beam. The first apparatus 110 knows the beam information of the first beam associated with the first apparatus 110 itself. The first apparatus 110 may determine the angle difference between the second beam and the first beam based on the received beam information of the second beam.
[0099] With the angle difference between the first and second beams or the beam information of the second beam, the first apparatus 110 may determine (455) the timing adjustment value further based on the angle difference or the beam information. Embodiments of the determination of the timing adjustment value will be described with respect to FIG. 5, which illustrates an example diagram 500 of UE-to-UE CLI in intra-cell according to some example embodiments of the present disclosure.
[0100] In the example of FIG. 5, the first apparatus 110 may be implemented as a UE2 520 which is a victim UE, the second apparatus 120 may be implemented as a gNB 540, and the third apparatus 130 may be implemented as a UE1 510 which is an aggressor UE. Another victim UE3 530 also exists in the environment in this example. A beam 525 is from the gNB 540 to the UE2 520. A beam 515 is from the gNB 540 to the UE1 510. A beam 535 is from the gNB 540 to the UE3 530.
[0101] As depicted, the timing adjustment value for the victim UE2 520 may be determined based on an offset between timing advances values of the UE1 510 and UE2 520, which may be referred to as “ΔT1-2” . In some example embodiment, the value ΔT1-2 or a value may be determined based on a TA value of UE2 520 (that is, TA2) , a TA value of UE1 510 (that is, TA1) , and an angle difference between the beam 515 and the beam 525. The TA value of the UE1 510 may represent 2*propagation delay or 2*distance between the gNB 540 and aggressor UE1 510. For the UE3 530, a similar offset value “ΔT1-3” or may be determined in a similar way.
[0102] In some example embodiments, the value may be determined by:
[0103] where TA1 denotes the TA value of the UE1 510 relative to the gNB 540, TA2 denotes the TA value of the UE2 520 relative to the gNB 540, and θ denotes the angle difference between the beam 515 and the beam 525.
[0104] Based on the timing adjustment value for the victim UE2 520 may be determined by:
[0105] In some example embodiments, if the UE1 510 and the UE2 520 are served in a same beam, that is, the angle difference θ is 0 degree, the timing adjustment value may be determined as If TA2 is larger than TA1, then the timing adjustment value may be determined as TA1. Otherwise, if TA2 is less than TA1, then the timing adjustment value is calculated to be TA2. It is to be understood that the TA value of UE relative to the gNB is usually associated with the distance between the UE and the gNB. If UE2 520 is further away from the gNB 540 (or the serving cell of the gNB 540) , the TA2 of UE2 520 may be larger than TA1, thus the timing adjustment value for UE2 520 may be TA1. Otherwise, if UE1 510 is further away from the gNB 540 or the serving cell, TA1 may be larger than TA2, and thus the timing adjustment value for UE2 520 may be TA2.
[0106] Several example embodiments about determining the timing adjustment value based on at least one of the TA value of the first apparatus 110, the TA value of the third apparatus 130, the angle difference between beams of the first apparatus 110 and the third apparatus 130, or the beam information of the third apparatus 130 are described with respect to FIG. 5. It is to be understood that the determination may be conducted by the first apparatus 110 and / or the second apparatus 120. For example, the first apparatus 110 such as UE2 520 in FIG. 5 may determine the timing adjustment value based on parameters such as TA1, TA2 or θ included in the received information. For another example, the second apparatus 120 such as the gNB 540 in FIG. 5 may determine (435) the timing adjustment value in a similar way and then indicate the value to the first apparatus 110 via the information.
[0107] As the TA value of UE may be associated with the distance between UE and gNB, the timing adjustment value may also be determined based on the distance between UE and gNB. Referring back to FIG. 4, in some example embodiments, the received (445) information may include a first distance between the third apparatus 130 and the second apparatus 120. Alternatively, or in addition, in some example embodiments, the information may include a second distance between the third apparatus 130 and the first apparatus 110.
[0108] Based on the first distance and / or the second distance, the first apparatus 110 may determine (455) the timing adjustment value. In an example embodiment, the information includes the second distance. The first apparatus 110 may know about its own distance (referred to as a third distance) to the second apparatus 120 and its own TA value (for example, already configured by the second apparatus 120 for communication) . The first apparatus 110 may determine (455) the timing adjustment value based on the second distance and a ratio between the TA value of the first apparatus 110 and the third distance.
[0109] In embodiments where the information includes the first distance between the third apparatus 130 and the second apparatus 120, the determination of the timing adjustment value may be similar. The first apparatus 110 may determine the second distance between the third apparatus 130 and the first apparatus 110 based on the first distance and the third distance, and then determine the timing adjustment value based on the second distance. The second distance may be determined based on the first distance, the third distance and the angle difference between the first beam of the first apparatus 110 and the second beam of the third apparatus 130 by using the trigonometric function such as the law of Cosines or any other suitable function, which will not be described in detail here. If the first apparatus 110 and the third apparatus 130 are associated with a same beam, for example, served by a same beam, the second distance may be simply determined as the difference between the first distance and the third distance.
[0110] It is to be understood that in embodiments where the information including the second distance between the third apparatus 130 and the first apparatus 110, the second distance may be determined by the second apparatus 120 based on the first distance and the third distance in a similar way.
[0111] As described, the information may include information elements such as at least one of TA value of the aggressor apparatus, beam information of the aggressor apparatus or distance information of the aggressor apparatus. With the aggressor apparatus information, the victim apparatus may perform the timing adjustment of the receiving timing of the reference signal from the aggressor apparatus. In other words, in the SBFD network, the SBFD aware UE (s) receives intra-cell aggressor UE information to assist the CLI measurement timing adjustment. This information may come in form of aggressor UEs timing advance details and the angle difference between the beams served by aggressor and victim UEs, or the aggressor UEs distance to the serving cell and the beam used for serving the aggressor UE.
[0112] After receiving this information from the network (or the serving cell) , the victim SBFD aware UEs may calculate the distance or timing offset (also referred to as the timing adjustment value) between themselves and aggressor UE (s) . The victim UE can adjust its baseline DL Rx timing to accurately measure the reference signal RSRP and report it to the network.
[0113] Alternatively, the network may itself calculate the timing offset between aggressor UE and victim UE (s) as the angle and timing advance of each serving UE is known to the network. Then, the network sends the timing offset or distance offset information to the victim UE (s) . In an example embodiment, the timing offset may be in form of a second TA for the victim UE. The victim UE may apply the first (or legacy) TA for transmission / reception with the serving cell, and apply the second TA for measuring intra-cell UE-to-UE CLI.
[0114] Various example embodiments of the information and the timing adjustment based on the information have been described. It is to be understood that the information may include one or more of the above parameters or values, the information may also include any other suitable parameter for the timing adjustment. It is to be also understood that the determination methods or calculations for the timing adjustment value are only for purpose of illustration, any other suitable calculation function or method may be applied. Scope of the present disclosure is not limited here.
[0115] FIG. 6A to FIG. 6C illustrate example diagrams 600, 630 and 660 of timing adjustment for the first apparatus 110 such as the victim UE, respectively. In the example of FIG. 6A, it is assumed that an aggressor UE1 and a victim UE2 are in different beams. As illustrated, the timing adjustment value 605 is determined as That is, the UE2 receiving (Rx) timing may be adjusted in ahead based on the timing adjustment value 605.
[0116] In the examples of FIG. 6B and FIG. 6C, it is assumed that the aggressor UE1 and the victim UE2 are in a same beam. In the example diagram 630 of FIG. 6B, the victim UE2 is further away from the serving cell, the timing adjustment value 635 may be determined as TA1, as illustrated. That is, the UE2 Rx timing may be adjusted based on TA1. In the example diagram 660 of FIG. 6C, the aggressor UE1 is further away from the serving cell, the timing adjustment value 665 may be determined as TA2, as illustrated. That is, the UE2 Rx timing may be adjusted based on TA2. With embodiments referring to FIG. 6A to FIG. 6C, the timing adjustment for the receiving timing of the reference signal is described more intuitively. As used herein, the timing adjustment value or the timing offset determined by (1) and (2) and those timing adjustment value described with respect to FIG. 6A to FIG. 6C may be referred to as “accuracy calculation timing adjustment value” or “accuracy calculation timing offset” .
[0117] 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. The second apparatus 120 may send timing adjustment information regarding the fourth apparatus 140 to the first apparatus 110, as well. For example, the second apparatus 120 may send TA and / or beam angle information of the fourth apparatus 140 to the first apparatus 110. The first apparatus 110 may perform timing adjustment for the receiving timing of the reference signal from the fourth apparatus 140.
[0118] There may also be more than one victim apparatus with respect to the third apparatus 130. The second apparatus 120 may also transmit timing adjustment information for a receiving timing of a reference signal from the third apparatus 130 to another victim apparatus. That is, the second apparatus 120 may transmit, to at least one victim apparatus, at least one information regarding timing adjustment of at least one receiving timing of at least one reference signal from at least one aggressor apparatus. The number of the victim apparatus and the number of the aggressor apparatus are not limited.
[0119] Still referring to FIG. 4, alternatively, or in addition, in some example embodiments, the information may include a first value of the timing adjustment associated with a cell serving the third apparatus 130 and a second value of the timing adjustment associated with the first apparatus 110. In other words, the second apparatus 120 may indicate, to the first apparatus 110 (or the first apparatus 110 may receive) a configuration of a cell level timing adjustment and an apparatus level (also referred to UE level or device level) timing adjustment. For the cell level timing adjustment, the downlink may refer to the transmitting timing of the aggressor (for example, the third apparatus 130) . For the apparatus level timing adjustment, the downlink may refer to the receiving timing of the victim (that is, the first apparatus 110) .
[0120] In some example embodiments, the first apparatus 110 may determine a first adjusted receiving timing of the reference signal based on the first value. The first apparatus 110 may perform (465) a first measurement of the reference signal based on the first adjusted receiving timing. The first apparatus 110 may also determine a second adjusted receiving timing of the reference signal based on the second value. The first apparatus 110 may perform (465) a second measurement of the reference signal based on the second adjusted receiving timing. The first or second measurement may be measuring RSRP of DMRS from the third apparatus 130, or the like.
[0121] In some example embodiments, the first value may be associated with a first timing advance value of the third apparatus 130 relative to the second apparatus 120. For example, the first value may be half of the TA value of the third apparatus 130. The second value may be associated with a second TA value for a communication between the first apparatus 110 and the second apparatus 120. For example, the second value may be the second TA value.
[0122] The first apparatus 110 may transmit (470) , to the second apparatus 120, at least one of: a first measurement result of the first measurement, or a second measurement result of the second measurement. In some example embodiments, the first apparatus 110 may compare these two measurement results, and report a worse result to the second apparatus 120. Alternatively, the first apparatus 110 may report both results to the second apparatus 120. By comparing the two measurement results, the first apparatus 110 and / or the second apparatus 120 may know the accuracy impact from the third apparatus 130 (that is, the aggressor impact) .
[0123] In some example embodiments, the first value may be associated with a first timing advance value of the third apparatus 130 relative to the second apparatus 120. For example, the first value may be half of the TA value of the third apparatus 130. The second value may be associated with a second TA value for a communication between the first apparatus 110 and the second apparatus 120. For example, the second value may be the second TA value. The first timing adjustment and the second timing adjustment in combination may be referred to as “rough calculation timing adjustment” or “rough calculation timing offset” . With the rough timing adjustment, less calculation may be performed.
[0124] It is to be understood that in some example embodiments, there may be more than one aggressor apparatus such as a plurality of aggressor UEs for the first apparatus 110. The second apparatus 120 may transmit configurations of a plurality of cell level timing adjustment values such as a plurality of aggressor UE TA values or a plurality of half TA values of the plurality of aggressor UEs.
[0125] FIG. 7 illustrates timing adjustment for UE level and cell level according to some example embodiments of the present disclosure. FIG. 7 shows the gNB timing 700 and the UEs timing 710. As illustrated, UL DMRS from the UE1 (the aggressor) is at #0 symbol and #7 symbol. For the second UL DMRS in #7 symbol, the cell level channel state information (CSI) for interference measurement (CSI-IM) or zero-power (ZP) CSI-RS for UL RSRP is configured in DL #7 symbol. The victim UEs (such as UE2 which is close to UE1 and UE3 which is far away from UE1) may need to measure DMRS RSRP on the symbols (#7-TA1 / 2) , where TA1 represents the TA value of the aggressor UE1. For example, UE2 may measure DMRS RSRP on symbol 720, and UE3 may measure DMRS RSRP on symbol 730 for the cell level CSI-IM.
[0126] For the UE level measurement, UL second DMRS is #7 symbol, then the cell level CSI-IM or ZP-CSI-RS for UL RSRP is configured in DL #7 symbol. In such cases, the victim UEs need to measure DMRS RSRP on the symbols # (7 -victim oneself TA value) . For example, UE2 may measure DMRS RSRP on symbol 725, that is, the symbol # (7 –TA2) , where TA2 represents the TA value of UE2. UE3 may measure DMRS RSRP on symbol 735 which is the symbol # (7 –TA3) , where TA3 represents the TA value of UE3.
[0127] By using the timing adjustment for measurement according to some example embodiments of the present disclosure, the victim apparatuses such as victim UEs can adjust the Rx timing to improve accuracy of CLI measurement. That is, the victim UEs can more accurately measure CLI such as CLI RSRP. The accuracy of intra-cell UE-to-UE co-channel inter-subband CLI measurement can thus be improved. With the accuracy measurement result, the network can perform CLI mitigation, which will be benefic for the SBFD operations.
[0128] Referring back to FIG. 4, in some example embodiments, the transmitting (440) of the information may be triggered by the first apparatus 110. By way of example, the first apparatus 110 may measure (420) a signal quality of a received signal of the first apparatus 110, such as a CLI-RSSI or DL block error ratio (BLER) . For example, the first apparatus 110 may be configured to measure (420) CLI RSSI over configured measurement resources. The RSSI measurements do not distinguish the source of the interference.
[0129] CLI-RSSI is defined as linear average of the total received power (in [W] ) observed only in the configured orthogonal frequency division multiplexing (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, and the like. The CLI-RSSI may be applicable for RRC_CONNECTED intra-frequency.
[0130] For frequency range 1, the reference point for the RSSI shall be the antenna connector of the first apparatus 110. 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 first apparatus 110, the reported CLI-RSSI value shall not be lower than the corresponding CLI-RSSI of any of the individual receiver branches. In the following description, some example embodiments are described with the signal quality of the received signal of the first apparatus 110 being the CLI-RSSI measured by the first apparatus 110.
[0131] In some example embodiments, if the signal quality such as the RSSI is greater than or equal to a threshold, the first apparatus 110 may transmit (425) , to the second apparatus 120, the signal quality (such as the RSSI) and / or a request for the information. The threshold (such as the CLI-RSSI threshold) may be predefined, configured or specified. The second apparatus 120 may receive (430) the RSSI and / or the request. In response to receiving (430) the RSSI and / or the request, the second apparatus 120 may transmit (440) the information to the first apparatus 110. In other words, if the reported CLI RSSI is higher than desired (for example, the threshold) , the second apparatus 120 such as the gNB may trigger CLI RSRP measurements to individually measure the CLI of different aggressors such as different aggressor UEs. If configuring the measurement resources, the second apparatus 120 may include the aggressor UE information such that the first apparatus 110 (such as the victim UE) may adjust its DL Rx timing for the measurements.
[0132] Alternatively, or in addition, in some example embodiments, if the signal quality such as the RSSI is less than the threshold, the first apparatus 110 may keep on the current measurement methods. For example, the first apparatus 110 may not adjust the Rx timing of DMRS. By using the current measurement and the timing adjusted measurement under different situation, such “2-step CLI measurement” may be applicable for different scenarios or different CLI conditions.
[0133] In this way, the SBFD aware UE (s) may measure and report the CLI-RSSI if the RSSI CLI or DL BLER exceeds the (predefined) threshold. Then, the network can trigger victim UE (s) to measure DMRS or SRS RSRP of a specific aggressor UE or a group of UEs.
[0134] Alternatively, in some example embodiments, the first apparatus 110 may transmit (425) the measured RSSI to the second apparatus 120 without comparing it with the threshold. The second apparatus 120 may determine whether the received RSSI exceeds the threshold. If the received RSSI exceeds the threshold, the second apparatus 120 may transmit (440) the information to the first apparatus 110. In this way, the network can trigger victim UE (s) to measure DMRS or SRS RSRP of a specific aggressor UE or a group of UEs.
[0135] By using timing adjustment for measurement for example in the SBFD network, the (intra-cell) UE-to-UE co-channel inter-subband CLI timing alignment can be achieved. The victim UE (s) Rx timing can be adjusted to improve accuracy of intra-cell UE-to-UE co-channel inter-subband CLI measurement. With the improved measurement result, the network can apply CLI mitigation schemes to improve the SBFD operations.
[0136] FIG. 8 shows a flowchart of an example method 800 implemented at a first apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 800 will be described from the perspective of the first apparatus 110 in FIG. 1.
[0137] At block 810, the first apparatus 110 receives, from a second apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus.
[0138] At block 820, the first apparatus 110 determines the receiving timing of the reference signal.
[0139] At block 830, the first apparatus 110 adjusts the receiving timing of the reference signal based on the information.
[0140] At block 840, the first apparatus 110 performs at least one measurement of the reference signal based on the adjusted receiving timing.
[0141] In some example embodiments, the information comprises at least one of: a first timing advance value of the third apparatus relative to the second apparatus, a second timing advance value for a communication between the first and second apparatuses, a first distance between the third apparatus and the second apparatus, a second distance between the third apparatus and the first apparatus, an angle difference between a first beam associated with the first and second apparatuses and a second beam associated with the second and third apparatuses, beaming information of the second beam, or a value of the timing adjustment.
[0142] In some example embodiments, the method 800 further comprises: determining a value of the timing adjustment based on the information.
[0143] In some example embodiments, the information comprises a first timing advance value of the third apparatus relative to the second apparatus and a second timing advance value for a communication between the first and second apparatuses, and the first apparatus 110 may determine the value based at least in part on at least one of: the first timing advance value, or the second timing advance value.
[0144] In some example embodiments, the information further comprises at least one of:an angle difference between a first beam associated with the first and second apparatuses and a second beam associated with the second and third apparatuses, or beam information of the second beam, and the first apparatus 110 may determine the value further based on the at least one of the angle difference or the beam information.
[0145] In some example embodiments, the method 800 further comprises: determining a second distance between the third apparatus and the first apparatus; and determining the value based on the third distance.
[0146] In some example embodiments, the method 800 further comprises: determining the second distance based at least in part on the first distance and a third distance between the first apparatus and the second apparatus.
[0147] In some example embodiments, the information further comprises at least one of: an angle difference between a first beam associated with the first and second apparatuses and a second beam associated with the second and third apparatuses, or beam information of the second beam, and the first apparatus 110 may determine the second distance further based on the at least one of the angle difference or the beam information.
[0148] In some example embodiments, the information comprises a first value of the timing adjustment associated with a cell serving the third apparatus and a second value of the timing adjustment associated with the first apparatus.
[0149] In some example embodiments, the method 800 further comprises: determining a first adjusted receiving timing of the reference signal based on the first value; performing a first measurement of the reference signal based on the first adjusted receiving timing; determining a second adjusted receiving timing of the reference signal based on the second value; performing a second measurement of the reference signal based on the second adjusted receiving timing; and transmitting, to the second apparatus, at least one of: a first measurement result of the first measurement, or a second measurement result of the second measurement.
[0150] In some example embodiments, the first value is associated with a first timing advance value of the third apparatus relative to the second apparatus, and the second value is associated with a second timing advance value for a communication between the first and second apparatuses.
[0151] In some example embodiments, the method 800 further comprises: in accordance with a determination that a signal quality of a received signal of the first apparatus is greater than or equal to a threshold, transmitting, to the second apparatus, at least one of: the signal quality or a request for the information.
[0152] In some example embodiments, the first apparatus comprises a first terminal device, the second apparatus comprises a network node, the third apparatus comprises a second terminal device. A transmission from the network node to the first terminal device and a transmission from the second terminal device to the network node is sub-band non-overlapping full-duplex.
[0153] FIG. 9 shows a flowchart of an example method 900 implemented at a second apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 900 will be described from the perspective of the second apparatus 120 in FIG. 1.
[0154] At block 910, the second apparatus 120 transmits, to a first apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus.
[0155] At block 920, the second apparatus 120 receives, from the first apparatus, at least one measurement result of at least one measurement of the reference signal, the at least one measurement being performed by the first apparatus based on the adjusted receiving timing of the reference signal.
[0156] In some example embodiments, the information comprises at least one of: a first timing advance value of the third apparatus relative to the second apparatus, a second timing advance value for a communication between the first and second apparatuses, a first distance between the third apparatus and the second apparatus, a second distance between the third apparatus and the first apparatus, an angle difference between a first beam associated with the first and second apparatuses and a second beam associated with the second and third apparatuses , beaming information of the second beam, or a value of the timing adjustment.
[0157] In some example embodiments, the method 900 further comprises: determining a value of the timing adjustment based on at least one of a first timing advance value of the third apparatus relative to the second apparatus, a second timing advance value for a communication between the first and second apparatuses, a first distance between the third apparatus and the second apparatus, a second distance between the third apparatus and the first apparatus, an angle difference between a first beam associated with the first and second apparatuses and a second beam associated with the second and third apparatuses, or beaming information of the second beam.
[0158] In some example embodiments, the method 900 further comprises: determining the value based at least in part on at least one of: the first timing advance value, or the second timing advance value.
[0159] In some example embodiments, the method 900 further comprises: determining the value further based on at least one of the angle difference or the beam information.
[0160] In some example embodiments, the method 900 further comprises: determining a second distance between the third apparatus and the first apparatus based at least in part on a first distance between the third apparatus and the second apparatus and a third distance between the first apparatus and the second apparatus.
[0161] In some example embodiments, the method 900 further comprises: determining the second distance further based on at least one of: an angle difference between a first beam associated with the first and second apparatuses and a second beam associated with the second and third apparatuses, or beam information of the second beam.
[0162] In some example embodiments, the information comprises a first value of the timing adjustment associated with a cell serving the third apparatus and a second value of the timing adjustment associated with the first apparatus.
[0163] In some example embodiments, the first value is associated with a first timing advance value of the third apparatus relative to the second apparatus, and the second value is associated with a second timing advance value for a communication between the first and second apparatuses.
[0164] In some example embodiments, the method 900 further comprises: receiving, from the first apparatus, at least one of: a signal quality of a received signal of the first apparatus or a request for the information; and in response to receiving the at least one of the signal quality or the request, transmitting the information to the first apparatus.
[0165] In some example embodiments, the first apparatus comprises a first terminal device, the second apparatus comprises a network node, the third apparatus comprises a second terminal device. A transmission from the network node to the first terminal device and a transmission from the second terminal device to the network node is sub-band non-overlapping full-duplex.
[0166] In some example embodiments, a first apparatus capable of performing any of the method 800 (for example, the first apparatus 110 in FIG. 1) may comprise means for performing the respective operations of the method 800. 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.
[0167] In some example embodiments, the first apparatus comprises means for receiving, from a second apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus; means for determining the receiving timing of the reference signal; means for adjusting the receiving timing of the reference signal based on the information; and means for performing at least one measurement of the reference signal based on the adjusted receiving timing.
[0168] In some example embodiments, the first apparatus further comprises means for performing other operations in some example embodiments of the method 800 or the first apparatus 110. In some example embodiments, the means comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the performance of the first apparatus.
[0169] In some example embodiments, a second apparatus capable of performing any of the method 900 (for example, the second apparatus 120 in FIG. 1) may comprise means for performing the respective operations of the method 900. 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.
[0170] In some example embodiments, the second apparatus comprises means for transmitting, to a first apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus; and means for receiving, from the first apparatus, at least one measurement result of at least one measurement of the reference signal, the at least one measurement being performed by the first apparatus based on the adjusted receiving timing of the reference signal.
[0171] In some example embodiments, the second apparatus further comprises means for performing other operations in some example embodiments of the method 900 or the second apparatus 120. In some example embodiments, the means comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the performance of the second apparatus.
[0172] FIG. 10 is a simplified block diagram of a device 1000 that is suitable for implementing example embodiments of the present disclosure. The device 1000 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 1000 includes one or more processors 1010, one or more memories 1020 coupled to the processor 1010, and one or more communication modules 1040 coupled to the processor 1010.
[0173] The communication module 1040 is for bidirectional communications. The communication module 1040 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 1040 may include at least one antenna.
[0174] The processor 1010 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 1000 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.
[0175] The memory 1020 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) 1024, 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) 1022 and other volatile memories that will not last in the power-down duration.
[0176] A computer program 1030 includes computer executable instructions that are executed by the associated processor 1010. The instructions of the program 1030 may include instructions for performing operations / acts of some example embodiments of the present disclosure. The program 1030 may be stored in the memory, e.g., the ROM 1024. The processor 1010 may perform any suitable actions and processing by loading the program 1030 into the RAM 1022.
[0177] The example embodiments of the present disclosure may be implemented by means of the program 1030 so that the device 1000 may perform any process of the disclosure as discussed with reference to FIG. 4 to FIG. 9. The example embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
[0178] In some example embodiments, the program 1030 may be tangibly contained in a computer readable medium which may be included in the device 1000 (such as in the memory 1020) or other storage devices that are accessible by the device 1000. The device 1000 may load the program 1030 from the computer readable medium to the RAM 1022 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) .
[0179] FIG. 11 shows an example of the computer readable medium 1100 which may be in form of CD, DVD or other optical storage disk. The computer readable medium 1100 has the program 1030 stored thereon.
[0180] 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.
[0181] 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.
[0182] 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.
[0183] 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.
[0184] 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.
[0185] 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.
[0186] 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 regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus;determine the receiving timing of the reference signal;adjust the receiving timing of the reference signal based on the information; andperform at least one measurement of the reference signal based on the adjusted receiving timing.2.The first apparatus of claim 1, wherein the information comprises at least one of:a first timing advance value of the third apparatus relative to the second apparatus,a second timing advance value for a communication between the first and second apparatuses,a first distance between the third apparatus and the second apparatus,a second distance between the third apparatus and the first apparatus,an angle difference between a first beam associated with the first and second apparatuses and a second beam associated with the second and third apparatuses,beam information of the second beam, ora value of the timing adjustment.3.The first apparatus of claim 1 or 2, wherein the first apparatus is caused to:determine a value of the timing adjustment based on the information.4.The first apparatus of claim 3, wherein the information comprises a first timing advance value of the third apparatus relative to the second apparatus and a second timing advance value for a communication between the first and second apparatuses, andthe first apparatus is further caused to determine the value based at least in part on at least one of: the first timing advance value, or the second timing advance value.5.The first apparatus of claim 4, wherein the information further comprises at least one of: an angle difference between a first beam associated with the first and second apparatuses and a second beam associated with the second and third apparatuses, or beam information of the second beam, andthe first apparatus is further caused to determine the value further based on the at least one of the angle difference or the beam information.6.The first apparatus of claim 3, wherein the first apparatus is further caused to:determine a second distance between the third apparatus and the first apparatus; anddetermine the value based on the third distance.7.The first apparatus of claim 6, wherein the information comprises a first distance between the third apparatus and the second apparatus, and the first apparatus is further caused to:determine the second distance based at least in part on the first distance and a third distance between the first apparatus and the second apparatus.8.The first apparatus of claim 7, wherein the information further comprises at least one of: an angle difference between a first beam associated with the first and second apparatuses and a second beam associated with the second and third apparatuses, or beam information of the second beam, andthe first apparatus is further caused to determine the second distance further based on the at least one of the angle difference or the beam information.9.The first apparatus of claim 1, wherein the information comprises a first value of the timing adjustment associated with a cell serving the third apparatus and a second value of the timing adjustment associated with the first apparatus.10.The first apparatus of claim 9, wherein the first apparatus is further caused to:determine a first adjusted receiving timing of the reference signal based on the first value;perform a first measurement of the reference signal based on the first adjusted receiving timing;determine a second adjusted receiving timing of the reference signal based on the second value;perform a second measurement of the reference signal based on the second adjusted receiving timing; andtransmit, to the second apparatus, at least one of: a first measurement result of the first measurement, or a second measurement result of the second measurement.11.The first apparatus of claim 9 or 10, wherein the first value is associated with a first timing advance value of the third apparatus relative to the second apparatus, and the second value is associated with a second timing advance value for a communication between the first and second apparatuses.12.The first apparatus of any of claims 1-11, wherein the first apparatus is caused to:in accordance with a determination that a signal quality of a received signal of the first apparatus is greater than or equal to a threshold, transmit, to the second apparatus, at least one of: the signal quality or a request for the information.13.The first apparatus of any of claims 1-12, wherein the first apparatus comprises a first terminal device, the second apparatus comprises a network node, the third apparatus comprises a second terminal device, and a transmission from the network node to the first terminal device and a transmission from the second terminal device to the network node is sub-band non-overlapping full-duplex.14.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:transmit, to a first apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus; andreceive, from the first apparatus, at least one measurement result of at least one measurement of the reference signal, the at least one measurement being performed by the first apparatus based on the adjusted receiving timing of the reference signal.15.The second apparatus of claim 14, wherein the information comprises at least one of:a first timing advance value of the third apparatus relative to the second apparatus,a second timing advance value for a communication between the first and second apparatuses,a first distance between the third apparatus and the second apparatus,a second distance between the third apparatus and the first apparatus,an angle difference between a first beam associated with the first and second apparatuses and a second beam associated with the second and third apparatuses,beam information of the second beam, ora value of the timing adjustment.16.The second apparatus of claim 14 or 15, wherein the second apparatus is caused to determine a value of the timing adjustment based on at least one of:a first timing advance value of the third apparatus relative to the second apparatus,a second timing advance value for a communication between the first and second apparatuses,a first distance between the third apparatus and the second apparatus,a second distance between the third apparatus and the first apparatus,an angle difference between a first beam associated with the first and second apparatuses and a second beam associated with the second and third apparatuses, orbeam information of the second beam.17.The second apparatus of claim 16, wherein the second apparatus is further caused to:determine the value based at least in part on at least one of: the first timing advance value, or the second timing advance value.18.The second apparatus of claim 17, wherein the second apparatus is further caused to:determine the value further based on at least one of the angle difference or the beam information.19.The second apparatus of claim 14 or 15, wherein the second apparatus is further caused to:determine a second distance between the third apparatus and the first apparatus based at least in part on a first distance between the third apparatus and the second apparatus and a third distance between the first apparatus and the second apparatus.20.The second apparatus of claim 19, wherein the second apparatus is further caused to:determine the second distance further based on at least one of: an angle difference between a first beam associated with the first and second apparatuses and a second beam associated with the second and third apparatuses, or beam information of the second beam.21.The second apparatus of claim 14, wherein the information comprises a first value of the timing adjustment associated with a cell serving the third apparatus and a second value of the timing adjustment associated with the first apparatus.22.The second apparatus of claim 21, wherein the first value is associated with a first timing advance value of the third apparatus relative to the second apparatus, and the second value is associated with a second timing advance value for a communication between the first and second apparatuses.23.The second apparatus of any of claims 14-22, wherein the second apparatus is caused to:receive, from the first apparatus, at least one of: a signal quality of a received signal of the first apparatus or a request for the information; andin response to receiving the at least one of the signal quality or the request, transmit the information to the first apparatus.24.The second apparatus of any of claims 14-23, wherein the first apparatus comprises a first terminal device, the second apparatus comprises a network node, the third apparatus comprises a second terminal device, and a transmission from the network node to the first terminal device and a transmission from the second terminal device to the network node is sub-band non-overlapping full-duplex.25.A method comprising:receiving, at a first apparatus from a second apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus;determining the receiving timing of the reference signal;adjusting the receiving timing of the reference signal based on the information; andperforming at least one measurement of the reference signal based on the adjusted receiving timing.26.A method comprising:transmitting, at a second apparatus to a first apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus; andreceiving, from the first apparatus, at least one measurement result of at least one measurement of the reference signal, the at least one measurement being performed by the first apparatus based on the adjusted receiving timing of the reference signal.27.A first apparatus comprising:means for receiving, from a second apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus;means for determining the receiving timing of the reference signal;means for adjusting the receiving timing of the reference signal based on the information; andmeans for performing at least one measurement of the reference signal based on the adjusted receiving timing.28.A second apparatus comprising:means for transmitting, to a first apparatus, information regarding a timing adjustment of a receiving timing of a reference signal from a third apparatus; andmeans for receiving, from the first apparatus, at least one measurement result of at least one measurement of the reference signal, the at least one measurement being performed by the first apparatus based on the adjusted receiving timing of the reference signal.29.A computer readable medium comprising instructions stored thereon for causing an apparatus at least to perform the method of claim 25 or the method of claim 26.
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