Link direction configuration in sub-band full duplex

Abstract

Example embodiments of the present disclosure are directed to link direction configuration in SBFD. A method comprises receiving, from a second apparatus, at least one measurement configuration; performing at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell based on the at least one measurement configuration; transmitting, to the second apparatus, at least one measurement report associated with a result of the at least one measurement; and receiving, from the second apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one SBFD time resource.

Description

LINK DIRECTION CONFIGURATION IN SUB-BAND FULL DUPLEXFIELD

[0001] 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 for link direction configuration in sub-band full-duplex (SBFD).BACKGROUND

[0002] A communication network may serve as a facility that enables communications between two or more communication devices or provides communication devices access to a data network. A mobile or wireless communication network is one example of a communication network. A communication device may be provided with a service by an application server. The communication network may operate in accordance with standards such as those provided by Third Generation Partnership Project (3 GPP) or European Telecommunications Standards Institute (ETSI). Examples of standards provided by 3GPP are the so-called 3GPP standards for cellular technology generations, such as 3GPP standards for 4G technology, 5G technology, 6G technology etc.

[0003] A sub-band full-duplex (SBFD) mode is a duplex communication approach that assigns uplink and downlink signals to separate resources (also referred to as sub-bands) for transmission. In this mode, uplink and downlink signals may be transmitted simultaneously in different frequency bands, thereby improving spectrum utilization and communication efficiency.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, at least one measurement configuration; perform at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell based on the at least one measurement configuration; transmit, to the second apparatus, at least one measurement reportassociated with a result of the at least one measurement; and receive, from the second apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[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, at least one measurement configuration; receive, from the first apparatus, at least one measurement report associated with a result of at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell; and in accordance with a determination that a first set of conditions among at least one set of conditions is satisfied based on the result of the at least one measurement, transmit, to the first apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[0006] In a third aspect of the present disclosure, there is provided a method. The method comprises: receiving, from a second apparatus, at least one measurement configuration; performing at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell based on the at least one measurement configuration; transmitting, to the second apparatus, at least one measurement report associated with a result of the at least one measurement; and receiving, from the second apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[0007] In a fourth aspect of the present disclosure, there is provided a method. The method comprises: transmitting, to a first apparatus, at least one measurement configuration; receiving, from the first apparatus, at least one measurement report associated with a result of at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell; and in accordance with a determination that a first set of conditions among at least one set of conditions is satisfied based on the result of the at least one measurement, transmitting to the first apparatus, a first indication of activating a first link direction configuration, the first link directionconfiguration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[0008] In a fifth aspect of the present disclosure, there is provided a first apparatus. The first apparatus comprises means for receiving, from a second apparatus, at least one measurement configuration; means for performing at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell based on the at least one measurement configuration; means for transmitting, to the second apparatus, at least one measurement report associated with a result of the at least one measurement; and means for receiving, from the second apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[0009] In a sixth aspect of the present disclosure, there is provided a second apparatus. The second apparatus comprises means for transmitting, to a first apparatus, at least one measurement configuration; means for receiving, from the first apparatus, at least one measurement report associated with a result of at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell; and means for in accordance with a determination that a first set of conditions among at least one set of conditions is satisfied based on the result of the at least one measurement, transmitting to the first apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one subband full duplex, SBFD, time resource.

[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 at least the method according to the third aspect.

[0011] In an eighth 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 at least the method according to the fourth aspect.

[0012] 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

[0013] Some example embodiments will now be described with reference to the accompanying drawings, where:

[0014] FIG. 1 illustrates an example communication environment in which example embodiments of the present disclosure can be implemented;

[0015] FIG. 2A illustrates example Time Division Duplexing according to some example embodiments of the present disclosure;

[0016] FIG. 2B illustrates example Frequency Division Duplexing according to some example embodiments of the present disclosure;

[0017] FIG. 2C illustrates example sub-band full duplex according to some example embodiments of the present disclosure;

[0018] FIG. 3A illustrates schematic diagrams of two different arrangements of SBFD resources according to some example embodiments of the present disclosure;

[0019] FIG. 3B illustrates a block of SBFD resources and non-SBFD resources according to some example embodiments of the present disclosure;

[0020] FIG. 4A illustrates a schematic diagram of an example of cross link interference (CLI) according to some example embodiments of the present disclosure;

[0021] FIG. 4B illustrates a schematic diagram of an example of inter-cell UE-to-UE CLI according to some example embodiments of the present disclosure;

[0022] FIG. 5A illustrates a signaling flow of link direction coordination according to some example embodiments of the present disclosure;

[0023] FIG. 5B illustrates a signaling flow of link direction coordination according to some example embodiments of the present disclosure;

[0024] FIG. 6 illustrates a schematic diagram of an example of a SBFD configuration according to some example embodiments of the present disclosure;

[0025] FIG. 7A illustrates a schematic diagram of an example of a SBFD frame structure and a link direction configuration according to some example embodiments of the present disclosure;

[0026] FIG. 7B illustrates a schematic diagram of a SBFD frame structure and a link direction configuration according to some example embodiments of the present disclosure;

[0027] FIG. 7C illustrates a schematic diagram of a SBFD frame structure and a link direction configuration according to some example embodiments of the present disclosure;

[0028] FIG. 8A illustrates a signaling flow of a first alternative implementation according to some example embodiments of the present disclosure;

[0029] FIG. 8B illustrates a signaling flow of a second alternative implementation according to some example embodiments of the present disclosure;

[0030] FIG. 9A illustrates a flowchart of a method implemented at a first apparatus in accordance with some example embodiments of the present disclosure;

[0031] FIG. 9B illustrates a flowchart of a method implemented at a second apparatus in accordance with some example embodiments of the present disclosure;

[0032] FIG. 10A illustrates a flowchart of a method implemented at a first apparatus in accordance with some further example embodiments of the present disclosure;

[0033] FIG. 10B illustrates a flowchart of a method implemented at a second apparatus in accordance with some further example embodiments of the present disclosure;

[0034] FIG. 11 A illustrates a flowchart of a method implemented at a first apparatus in accordance with some yet further example embodiments of the present disclosure;

[0035] FIG. 1 IB illustrates a flowchart of a method implemented at a second apparatus in accordance with some yet further example embodiments of the present disclosure;

[0036] FIG. 12 illustrates a simplified block diagram of a device that is suitable for implementing example embodiments of the present disclosure; and

[0037] FIG. 13 illustrates a block diagram of an example computer readable medium in accordance with some example embodiments of the present disclosure.

[0038] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION

[0039] Principle of the present disclosure will now be described with reference to someexample embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. Embodiments described herein can be implemented in various manners other than the ones described below.

[0040] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.

[0041] References in the present disclosure to “one embodiment,” “an embodiment,” “an example embodiment,” and the like indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

[0042] It shall be understood that although the terms “first,” “second,”..., etc. in front of noun(s) 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 and they do not limit the order of the noun(s). For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.

[0043] As used herein, “at least one of the following: ” and “at least one of ” and similar wording, where the list of two or more elements are joined by “and” or “or”, mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements.

[0044] As used herein, unless stated explicitly, performing a step “in response to A” does not indicate that the step is performed immediately after “A” occurs and one or more intervening steps may be included.

[0045] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises”, “comprising”, “has”, “having”, “includes” and / or “including”, when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.

[0046] As used in this application, the term “circuitry” may refer to one or more or all of the following:(a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) and(b) combinations of hardware circuits and software, such as (as applicable):(i) a combination of analog and / or digital hardware circuit(s) with software / firmware and(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(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.

[0047] 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.

[0048] 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), 5.5G, the sixth generation (6G) 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.

[0049] As used herein, the term “network 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 header (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.

[0050] 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 (loT) 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.

[0051] 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 combination of the time, frequency, space and / or code domain 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.

[0052] FIG. 1A illustrates an example communication environment 100 in which example embodiments of the present disclosure can be implemented. As shown in FIG.1, the communication environment 100 comprises one or more network devices, such as a network device 110-1, a network device 110-2, and one or more terminal devices such as a terminal device 120 and a terminal device 130. For the purpose of discussion, the network device 110-1 and network device 110-2 are collectively or individually referredto as network devices 110 or RAN network devices.

[0053] In some example embodiments, the network device 110-1 may be a RAN network device of a serving cell 140, for example, a gNB of the serving cell 140 for the terminal device 120. The network device 110-2 may be a RAN network device of a neighbor cell 150, for example, a gNB of the neighbor cell 150 for the terminal device 130. In some embodiments, the neighbor cell 150 may be a candidate for LTM of the terminal device 120. In some embodiments, the cell 140 may be a candidate for LTM of the terminal device 130. The terminal device 120, for example, may be a UE served by the serving cell 140. The terminal device 130, for example, may be a UE served by the neighbor cell 150. The cell 150 may be a potential candidate to become a new serving cell for the terminal device 120.

[0054] In some example embodiments, a network device of a serving cell for a terminal device may include one or more distributed units (DUs), e.g., one or more gNB-DUs, and one or more central units (CUs), e.g., one or more gNB-CUs. For example, the network device 110 may include a CU 112-1, and one or more DUs 114-1, 114-2. The network device 110-2 may include a CU 112-2, and one or more DUs DU 114-3, 114-4. The CU 112-1 and CU 112-2 are collectively or individually referred to as CUs 112. The DU 114-1, 114-2, 114-3, 114-4 are collectively or individually referred to as DUs 114.

[0055] In some example embodiments, a DU may be connected to the terminal device 120, and each DU may serve one or more cells. Depending on whether the serving cell and a candidate target cell are associated with the same CU, the LTM procedure may include an intra-CU LTM procedure or an inter-CU LTM procedure. If the candidate target cell(s) and the serving cell are associated with the same CU, the intra-CU LTM procedure is applied. If the candidate target cell(s) and the serving cell are associated with different CUs, the inter-CU LTM procedure is applied.

[0056] In the following, for the purpose of illustration, some example embodiments may be described with the network device 110-1 or the network device 110-2 operating as a network device. However, in some example embodiments, operations described in connection with a terminal device may be implemented at a network device or other device, and operations described in connection with a network device may be implemented at a terminal device or other device.

[0057] It is to be understood that the number of devices and their connections shown inFIG. 1 are only for the purpose of illustration without suggesting any limitation. The communication environment 100 may include any suitable number of devices configured to implementing example embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional devices may be located in the cell 102, and one or more additional cells may be deployed in the communication environment 100. It is noted that although illustrated as a network device, the network device 110 may be another device than a network device. Although illustrated as a terminal device, the terminal device 120 or 130 may be another device than a terminal device.

[0058] In the following, for the purpose of illustration, some example embodiments are described with the terminal device operating as a UE and the network device operating as a base station. However, in some example embodiments, operations described in connection with a terminal device may be implemented at a network device or other device, and operations described in connection with a network device may be implemented at a terminal device or other device.

[0059] In some example embodiments, a transmission direction from the network device to the terminal device is referred to as a downlink (DL), while a transmission direction from the terminal device to the network device is referred to as an uplink (UL). In DL, the network device is a transmitting (TX) device (or a transmitter) and the terminal device is a receiving (RX) device (or a receiver). In UL, the terminal device is a TX device (or a transmitter) and the network device is a RX device (or a receiver).

[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, 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] For duplexing evolution including the SBFD, two duplexing modes are supported, including Frequency Division Duplexing (FDD) for paired bands and Time Division Duplexing (TDD) for unpaired bands. FIG. 2A illustrates example Time Division Duplexing according to some example embodiments of the present disclosure. In TDD, as shown in FIG. 2A, the time domain resources are split between downlink and uplink. Allocation of a limited time duration for the uplink in TDD would result in reduced coverage, increased latency, and reduced capacity. FIG. 2B illustrates example Frequency Division Duplexing according to some example embodiments of the present disclosure. In FDD, as shown in FIG. 2B, uplink and downlink transmission are allowed at the same time over different frequency bands which is separated by a guard band 220. Frequency bands are generally inflexible to change which may result in higher complexity and high cost.

[0062] Motivated by this, one of the objectives of the evolution of duplexing operation in the communication systems that addresses the challenges above is to allow simultaneous downlink and uplink transmission on different physical resource blocks (PRBs) / sub-bands within an unpaired carrier. FIG. 2C illustrates example sub-band full duplex. The intention of SBFD is to allow more UL transmission opportunities compared to the typical DL-heavy TDD configurations used in today’s TDD deployments. This bring benefits in terms of UL coverage and UL latency especially in wide area macro networks where many UEs are in power-limited conditions in the UL direction. As shown in FIG. 2C, downlink and uplink are operated simultaneously on the same time division duplex carrier on different frequency resources in SBFD. This duplexing scheme may be also referred to as cross division duplexing (xDD) scheme or flexible division duplexing (FDU).

[0063] FIG. 3A illustrates schematic diagrams of two different arrangements of SBFD resources, that is, DU / UD resources (left) and DUD resources (right). Some high-level principles on SBFD operation may be defined as follows. Simultaneous transmission and reception (on non-overlapping set of RBs) is assumed at the gNB side, while half-duplex operation is assumed the UE side. There is only one UL subband within a DU (UD) resource and one or at most two DL subbands within a TDD resource. In FIG. 3A, a U refers to an uplink slot or symbol, a D refers to a downlink slot or symbol. In some embodiments, one slot may correspond to 14 OFDM symbols. A SBFD subband is defined as one RB or more consecutive RBs which are used for the same transmission direction(either UL or DL). In a SBFD resource, UL transmission only take place within the UL subband, and DL receptions take place within the one or two DL subbands only. It is assumed that both time and frequency locations of subbands for SBFD operation are known to SBFD-aware UEs, while this information is not available for legacy UEs. In the context of the present disclosure, the term “UE” refers to SBFD-aware UE, unless the contrary is explicitly stated.

[0064] As shown in FIG. 3 A, one or more RBs may be used as a guard band between the UL and DL subbands to facilitate rejection of cross-link interference. Similarly, a guard time or period of one or more OFDM symbols may take place for the transition between different symbol or slot types.

[0065] FIG. 3B illustrates a block diagram 300B of SBFD resources and non-SBFD resources. As can be seen in FIG. 3B, there are two types of slots, i.e., SBFD slots 301 and non-SBFD slots 302 and 303, for both UL and DL transmissions. In the SBFD slots 301, the non-overlapping DL subbands and UL subbands both exist which enable UL and DL transmissions simultaneously within a wideband cell. In non-SBFD slots 302 and 303, the entire band is used for either DL or UL transmission. It is noted that in the context of the present disclosure, non-SBFD slots are also referred to as legacy slots, full DL slots, and UL slots.

[0066] In SBFD slots, a guard band is expected to be placed between DL and UL subbands. In the guard band the time and frequency resources are reserved that there is no UL or DL transmission. Guard resources 305 may extend to the non-SBFD slots 302. The guard band provides better isolation between UL and DL transmission and may reduce the impact of the self-interference between DL transmissions and UL reception at the gNB as well as cross-link interference (CLI) between UE to UE links, and gNB to gNB links. By enabling simultaneous uplink and downlink transmission, SBFD may improve spectrum efficiently and reduce latency.

[0067] Currently in the communication systems, the SBFD frame structure is not dynamic. In other words, in a SBFD frame, in terms of which slots or symbols are SBFD or non-SBFD and in terms of which RBs are designated to UL subbands, guard band and DL subbands are static or preconfigured. The SBFD resources are informed by cellspecific configuration and cannot be reverted by UE-specific signaling.

[0068] There have been discussions about whether the gNB will indicate the linkdirection to the UE and the option is listed as an optional operation. In a first option, the UE may determine the link direction based on configured or scheduled transmissions or receptions. Additionally, if applicable, the UE may determine the link direction based on collision handling. In a second option, the gNB may indicate the UE with link direction explicitly.

[0069] The main benefits of informing a link direction are that frequent reception to transmission switching at the UE in SBFD symbols is avoided, therefore saves power consumption and time which has to be considered by the gNB in the scheduling, and collision handling at the UE in case UL and DL signals are scheduled.

[0070] Currently, new types of interference of communication within SBFD resources are present when compared to traditional TDD systems. FIG. 4A illustrates a schematic diagram of an example of cross link interference. As can be seen in FIG. 4A, there are mainly five types of interference of UEs and gNBs.

[0071] Regarding a gNB itself, there may be self-interference 401 at the gNB due to the simultaneous transmissions and receptions in different antenna panels and inter-sector interference 402 due to the simultaneous transmissions and receptions in different sectors of the gNB with a plurality of sectors. In a scenario of two adjacent gNBs providing two cells, there may be gNB-to-gNB interference 403 due to simultaneous transmissions in different link directions by different gNBs. For example, the DL transmission of a gNB may interfere with the UL transmission of another gNB.

[0072] Regarding two UEs in one cell provided by a gNB, there may be UE-to-UE intracell interference 404 due to simultaneous transmissions and receptions by different UEs in the same cell. For example, a UE transmitting in uplink may interfere with another UE receiving in downlink of the same cell. In a scenario of two adjacent gNBs, there may be UE-to-UE inter-cell interference 405 due to simultaneous transmissions and receptions by different UEs in different cells. For example, a UE transmitting in uplink in a cell provided by a serving gNB may interfere with another UE receiving in downlink in a cell provided by a neighbor gNB.

[0073] The intra-cell or inter-cell interference may be solved by coordination between the gNBs or within the gNB. The present disclosure focuses on the UE-to-UE cross link interference (CLI). A first measurement method consists of a UE subject to CLI (also known as victim UE) measuring CLI-RSSI over certain time / frequency resource. The UEis able to detect the presence of CLI, but it cannot identify the source of the interference, i.e., the aggressor UE. A second measurement method helps in the identification of the aggressor UE by supporting sounding reference signal (SRS)-reference signal received power (RSRP) measurements, where the SRS is being transmitted by the aggressor UE.

[0074] FIG. 4B illustrates a schematic diagram of an example of inter-cell UE-to-UE CLI in the environment 100. As shown in FIG. 4B, inter-cell UE-to-UE CLI occurs when two adjacent terminal devices 120 and 130 from two different cells of the network devices 110-1 and 110-3 are assigned with different link directions simultaneously. The terminal device that is transmitting in UL might cause interference or even block the terminal device that is receiving DL signals from the neighbor gNB. In FIG. 4B, the scheduling of terminal devices in the SBFD slot is marked with an X. The terminal device that is transmitting in UL will cause CLI to the terminal device that is receiving in DL due to spurious emissions from the UL subband into the DL subband.

[0075] The inter-cell UE-to-UE CLI is even worse in edge of the cells, where terminal devices are transmitting with higher power compared to the terminal devices in the center of the cells due to power control, while other terminal devices from a neighbor cell may be receiving in DL with a relatively low transmission power. The UE subject to the intercell UE-to-UE CLI may suffer a signal to interference plus noise ratio (SINR) degradation due to CLI.

[0076] Usually, the UE-to-UE CLI may occur to UEs in the edge area of the cell due to simultaneous transmissions and receptions. However, the UE may not be able to change the transmission direction in the SBFD resources which is already determined by the UE based on configured or scheduled transmission or indicated by the gNB. Currently, there is no defined coordination mechanism for managing link direction between UEs and gNBs.

[0077] In accordance with some example embodiments of the present disclosure, there is provided a first solution for link direction coordination in SBFD. According to the solution, a terminal device receives at least one measurement configuration from a network device and perform at least one measurement with respect to a serving cell of the terminal device and / or at least one neighbor cell based on the at least one measurement configuration. The terminal device transmits at least one measurement report associated with a result of the at least one measurement to the network device and receives a first indication of activating a first link direction configuration from the network device. Thefirst link direction configuration indicating a link direction pattern on at least one SBFD time resource.

[0078] In accordance with some example embodiments of the present disclosure, there is provided a second solution for link direction coordination in SBFD. According to the present disclosure, a terminal device receives at least one measurement configuration and at least one set of conditions from a network device and performs at least one measurement with respect to a serving cell of the terminal device and / or at least one neighbor cell based on the at least one measurement configuration. In accordance with a determination that a first set of conditions among the at least one set of conditions is satisfied based on a result of the at least one measurement, the terminal device transmits indication information indicative of the first set of conditions being satisfied to the network device and receives a first indication of activating a first link direction configuration from the network device.

[0079] In accordance with some example embodiments of the present disclosure, there is provided a third solution for link direction coordination in SBFD. According to the present disclosure, a terminal device receives at least one measurement configuration and at least one set of conditions from a network device and performs at least one measurement with respect to a serving cell of the terminal device and / or at least one neighbor cell based on the at least one measurement configuration. In accordance with a determination that a first set of conditions among the at least one set of conditions is satisfied based on a result of the at least one measurement, the terminal device activates a first link direction configuration of the at least one link direction configuration. The terminal device may then transmit to the network device an indication that the first link direction configuration is activated.

[0080] The solutions provided herein enable coordinating or informing the link direction between the terminal device and the network device, thus the network can adjust their scheduling during SBFD symbols / slots accordingly. Further, the activation or deactivation of the link direction configuration may mitigate cross link interference in the inter-cell or intra-cell interference scenario.

[0081] It may be either the network device or the terminal device to determine activation of a link direction configuration in SBFD. In the first solution, the network device may determine whether the conditions are satisfied and then determine whether to activate ordeactivate the link direction configuration. In the second solution, the terminal device may determine whether the conditions are satisfied and inform the network device, and then the network device may determine whether to activate the link direction configuration. In the third solution, the terminal device may determine whether the conditions are satisfied and autonomously activate or deactivate the link direction configuration.

[0082] It should be noted that in the context of the present disclosure, the solutions of the present disclosure are described according to some examples of inter-cell UE-to-UE CLI, while the solution of the present disclosure is also applicable to the intra-cell UE-to-UE CLI.

[0083] Example embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0084] FIGS. 5A-5C illustrate some signaling flows 500A-500C of link direction coordination according to some example embodiments of the present disclosure. For the purpose of illustration, the signaling flow 500A is described with respect to FIG. 1. The signaling flow 500A involves the terminal device 120 and the network device 110-1 and 110-2. The terminal device 120 may be an SBFD aware terminal device, for example, an SBFD aware UE. The network device 110-1 provides a serving cell for the terminal device 120, and the network device 110-2 provides a neighbor cell which may be a serving cell for another terminal device. It would be appreciated that although one neighbor cell is mentioned here, there may be more than one neighbor cell of the serving cell may be taken into account.

[0085] As a common part in the signaling flows 500A-500C, in some example embodiments, the network device 110-1 and the network device 110-2 may exchange their preferred link direction configurations for terminal devices in their cells. The network device 110-1 may determine (502) a first link direction configuration in a communication procedure with at least one network device 110-2 providing the at least one neighbor cell. As used herein, a link direction configuration may indicate a link direction pattern on at least one SBFD time resource. The link direction pattern may indicate an uplink direction or a downlink direction is configured or allowed in a SBFD time resource. The network device 110-1 may determine the first link direction configuration to be activated for the terminal device 120 based on information receivedfrom the network device 110-2 (also referred to as a neighbor network device).

[0086] In some example embodiments, the network device 110-1 may transmit (504) at least one link direction configuration to be applied in the serving cell to the network device 110-2, and the at least one link direction configuration may include at least the first link direction configuration. Correspondingly, the network device 110-2 may receive (506) the at least one link direction configuration from the network device 110-1. The least one link direction configuration, or the first link direction configuration may be considered as preferred link direction (PLD) configuration in the cell of the network device 110-1, each indicating a preferred link direction in a SBFD time resource. In some examples, multiple PLD configurations may be configured between the network devices 110-1 and 110-2, while only one can be activated.

[0087] The network devices may communicate over the Xn interface and exchange the information signaling required for multiple purposes such as: handover information transfer, measurements configuration, random-access resources exchange, load balancing, frame information, etc. In some example embodiments, the Xn interface may also be used to also convey the SBFD-specific signaling. For example, the link direction configuration may be transmitted by the network device 110-1 to the network device 110-2 over an Xn interface. In some example embodiments, the link direction configuration may be transmitted over an Fl interface in a case of gNB architecture split. In some example embodiments, the link configuration may be added as a part of an existing information element (IE) “Intended TDD DL-UL Configuration NR”. In some example embodiments, the link configuration may be a new and independent IE.

[0088] Reference is now made to FIG. 6. FIG. 6 illustrates a schematic diagram of an example of a SBFD configuration according to some example embodiments of the present disclosure. As shown in FIG. 6, there are 10 slots in the SBFD configuration period 601. The link direction configuration may be indicated in the time domain by a starting slot index or a starting symbol index within the slot index. For example, the SBFD slots are slots 1 to 3, and 6 to 8. The network device 110-1 may inform that which slots or symbols, for example, the slot 602 and the slot 603 which are highlighted with a solid black rectangle, are configured to perform transmission or reception in only one direction by using the same structure. For example, the symbols 0 to 10 within slot 602 are configured to DL and the symbols 0 to 14 within slot 603 are configured to UL. The network device110-1 may schedule the terminal device 120 in the serving cell to perform DL transmission in slot 602 and UL transmission in slot 603.

[0089] In some example embodiments, the SBFD slot or symbol may not include information about the link direction, and the network device 110-1 may schedule the terminal device 120 in any link direction.

[0090] In some example embodiments, the network devices 110-1 may interpret the link direction configuration as the activated link direction which is enforced only to terminal devices which are identified as cell-edge terminal devices 120 and are currently subject to UE-to-UE CLI. Otherwise, the network devices 110-1 can freely use both link directions within a given SBFD time resource.

[0091] Through the above example embodiments, the neighbor network devices 110-1 and 110-2 may firstly coordinate a preferred link direction for some of the symbols or slots in the TDD-UL-DL SBFD configuration. In some example embodiments, the deactivation criteria for the link direction configuration may also be exchanged between the neighbor network devices 110-1 and 110-2, such as: a timer, validity frame counter, or receiving a new preferred link direction indication. Specifically, the network device 110-1 may transmit, to the network device 110-2, an activation time period for a link direction configuration. In some example embodiments, the activation time period may be in terms of number of frames, slots or symbols. In some example embodiments, the activation time period may be in terms of a timer in milliseconds, where the timer is counted by the time in which the link direction configuration is received or agreed. The expiry of the activation time period may indicate deactivation of the corresponding link direction configuration.

[0092] In some example embodiments, the activation of a link direction configuration may be done by the network, based on the measurement reports sent by the terminal device. Upon receiving the measurement report, the network device may decide whether the terminal device is a candidate for preferred link direction (PLD) activation.

[0093] Reference is made back to FIG. 5A to illustrate such example embodiments. The network device 110-1 may transmit (508) the at least one link direction configuration(s) to the terminal device 120. Correspondingly, the terminal device 120 may receive (512) the at least one link direction configuration (s) from the network device 110-1. In some example embodiments, the network device 110-1 may indicate the terminal device 120with information about the preferred link direction (PLD) configuration among the at least one link direction configuration. In some example embodiments, the at least one link direction configuration may be transmitted via radio resource control (RRC) signaling. In some example embodiments, the RRC signaling may include more than one link direction patterns for a given SBFD time resource, and each of the patterns may be identified by a PLD ID. Optionally, the network device 110-1 may transmit an indication of activating a PLD configuration.

[0094] In some example embodiments, the at least one link direction configuration may include the link direction that the terminal device 120 may assume on at least one SBFD time resource. In some example embodiments, the link direction configuration may be provided with different granularities. In one of such example embodiments, the link direction configuration may indicate a link direction on a frame configuration including at least one SBFD time resource. In a simple example, a single link direction may be configured, and it is applied to all the SBFD slots configured for the terminal device 120.

[0095] FIG. 7A illustrates a schematic diagram of an example of a SBFD configuration and an example link direction configuration for the SBFD configuration according to some example embodiments of the present disclosure. As shown in FIG. 7A, the link direction configuration may indicate a link direction on a frame configuration including at least one SBFD time resource. As shown in FIG. 7A, the SBFD frame structure 700 indicates 4 SBFD slots 701-704. In the SBFD frame structure 700, the SBFD configurations (represented as TDD-UL-DL-Configuration) indicates that SBFD subbands are configured from the 7th symbol of the first slot 701 to the 14th symbol of the fourth slot 704, and the fifth slot 705 are configured as UL slot. In such cases, a single link direction may be determined and applied to all the configured SBFD slots. When such a link direction is received and activated, only DL transmission is expected or allowed within all of the SBFD slots 701A-704A.

[0096] In some other example embodiments, the link direction preference is associated with the SBFD slots and / or symbols. For example, the link direction can be provided with slot level granularity. Or alternatively, the link direction could be indicated on a symbol level granularity, which will increase the scheduling flexibility at a cost of a higher volume of exchanged information. The SBFD symbols or slots within the TDD frame are assumed to be known and exchanged across the cells of the network devices 110-1 and110-2, and is also known by the terminal device 120. For example, a link direction configuration may indicate a link direction on at least one SBFD slot. For another example, a link direction configuration may indicate a link direction on at least one SBFD symbol or on at least one SBFD symbol and at least one SBFD slot.

[0097] FIG. 7B illustrates a schematic diagram of a SBFD configuration and an example link direction configuration for the SBFD configuration according to some example embodiments of the present disclosure. As shown in FIG. 7B, the link direction configuration may indicate a link direction on at least one SBFD slot. When such a link direction configuration is received and activated, only DL reception is expected or allowed within the SBFD slots 70 IB and 702B, while only UL transmission is allowed within the SBFD slots 703B and 704B.

[0098] FIG. 7C illustrates a schematic diagram of a SBFD frame structure and a link direction configuration according to some example embodiments of the present disclosure. As shown in FIG. 7C, the link direction configuration may indicate a link direction on at least one symbol or on at least one symbol and at least one slot. When such a link direction is received and activated, only DL transmission is expected or allowed within the SBFD slot 701C. Only DL transmission is expected or allowed within the symbols within the first part 706 of the SBFD slot 702C. For example, the first part 706 may include the first 7 symbols of the SBFD slot 702C. Only UL transmission is expected or allowed within the symbols within the second part 707 of the SBFD slot 702C. For example, the second part 707 may include the last 7 symbols of the SBFD slot 702C. Only UL transmission is expected or allowed within the SBFD slots 703C and 704C.

[0099] It is beneficial that the terminal device 120 is aware of the link direction that it should expected to be served within the SBFD slots. First, because the terminal device 120 will simplify its complexity if it knows in advance which type of signal (DL or UL) to expect for a given symbol / slot. Moreover, the link direction indication would assist the terminal device 120 on determining whether it should transmit or receive certain periodic or semi-persistent signals.

[0100] For instance, the terminal device 120 may be configured with UL configured grant resources (periodic UL resources) that periodically overlaps with a SBFD slot. Additionally, the terminal device 120 may receive a link direction configuration that a given SBFD slot should be used for DL reception due to at least one set of conditions aresatisfied. Thus, the terminal device 120 won’t perform the UL transmission on the given slot. It should be noted that this doesn’t require any dynamic signaling indication from the network device 110-1, but rather a semi-static configuration of the link direction. Without receiving an indication of performing DL transmission within the given SBFD slot, the terminal device 120 might still perform the UL transmission and thus causing harm to a terminal device 130 in the neighbor cell. This could be prevented if the network device 110-1 sends a DL grant which would overrule the UL configured grant. However, if the terminal device 120 has no DL data scheduled or no DL signal is scheduled (e.g., CSLRS), the terminal device 120 will transmit in UL as default.

[0101] Reference is made back to FIG. 5A. The network device 110-1 transmits (514) at least one measurement configuration to the terminal device 120. Correspondingly, the terminal device 120 receives (516) at least one measurement configuration from the network device 110-1. The terminal device 120 perform (518) at least one measurement with respect to at least one of a serving cell of the terminal device 120 or at least one neighbor cell based on the at least one measurement configuration.

[0102] In some example embodiments, the at least one measurement configuration may be configured as periodic, semi -persistent or aperiodic.

[0103] In some example embodiments, the at least one measurement configuration may include a first measurement configuration for measuring a channel quality of the serving cell. In some example embodiments, the first measurement configuration may include configuration for measuring a synchronization signal (SS) reference signal received power (RSRP) and / or a channel state information (CSI) RSRP in the serving cell. For example, the first measurement configuration may include measurement resources. The terminal device 120 may thus measure a first measurement, e.g., SS-RSRP and / or CSI-RSRP in the serving cell of the network device 110-1 based on the first measurement configuration. The result of the first measurement may indicate whether the terminal device 120 is in the edge area of the serving cell 140 provided by the network device 110-1. It would be appreciated that there may be other measurement metrics that may be configured and obtained by the terminal device 120 to indicate the channel quality, such as the reference signal received quality (RSRQ), reference signal strength indicator (RS SI), SINR, etc.

[0104] In some example embodiments, the at least one measurement configuration mayinclude a second measurement configuration for measuring a CLI in at least one of the serving cell or the at least one neighbor cell. In some example embodiments, the second measurement configuration may include configuration for measuring a CLI received signal strength indicator (RS SI) or a sounding reference signal (SRS) RSRP. For example, the second measurement configuration may include measurement resources. The terminal device 120 may thus measure CLI-RSSI and / or SRS-RSRP based on the second measurement configuration. The result of the second measurement may indicate the level of an interference between the terminal device 120 and other terminal devices (e.g., terminal devices in the neighbor cell 150 of the network device 110-2). It would be appreciated that there may be other measurement metrics that may be configured and obtained by the terminal device 120 to indicate the CLI.

[0105] The terminal device 120 transmits (522) the at least one measurement report associated with a result of the at least one measurement to the network device 110-1. Correspondingly, the network device 110-1 receives (524) the at least one measurement report from the terminal device 120.

[0106] In some example embodiments, the terminal device 120 may transmit, to the network device 110-1, preference information indicating at least one of the following: a preferred link direction on the at least one SBFD time resource, or an indication of a preferred link direction pattern on the at least one SBFD time resource. The preference information may be determined based on a type of traffic of the terminal device 120. Correspondingly, the network device 110-1 receive the preference information from the terminal device 120.

[0107] The network device 110-1 may determine a link direction configuration based on the result of the at least one measurement. For example, the network device 110-1 may determine a link direction configuration with more UL SBFD time resources if the channel quality of the serving cell getting worse. For example, the network device 110-1 may determine a link direction configuration with less UL SBFD time resources if the CLI is getting worse.

[0108] As shown in the signaling flow 500A, the network device 110-1 determines (525) whether a first set of conditions among at least one set of conditions is satisfied based on the result of the at least one measurement. The at least one set of conditions may include at least one first condition associated with at least one first measurement on the channelquality of the serving cell, or at least one second condition associated with at least one second measurement on the CLI.

[0109] The network device 110-1 may determine that at least one first condition is satisfied if the channel quality of the serving cell is below a quality threshold based on the at least one first measurement. The network device 110-1 may determine that the at least one second condition is satisfied if a power of the CLI is above a power threshold based on the at least one second measurement.

[0110] In some example embodiments, a condition may be configured to be associated with a threshold. The threshold may be configured to be specific to a certain type of measurement, such as the SS-RSRP, CSI-RSRP, CLI-RSSI, and / or SRS-RSRP. A satisfaction of the condition may be determined if a relationship between a measurement and the associated threshold. Thus, depending on the types of measurements to be considered, a set of conditions may include respective associated conditions or thresholds for those measurements.[OHl] In some example embodiments, the network device 110-1 may determine that at least one first condition is satisfied if the first measurement (e.g., the measured SS-RSRP or CSI-RSRP) is lower than a first quality threshold (e.g., a SS-RSRP threshold or a CSI-RSRP threshold), which may indicate that the terminal device 120 is in the cell edge. Alternatively, or in addition, the network device 110-1 may further determine that at least one second condition is satisfied if the second measurement (e.g., the measured CLI-RSSI or SRS-RSRP which may indicate a power or level of CLI) is higher than a second power threshold (e.g., a CLI-RSSI threshold or an SRS-RSRP threshold), which may indicate that the terminal device 120 is experiencing high level of CLI. Then the network device 110-1 may determine that a first link direction configuration is to be activated for the terminal device 120, in order to avoid mitigating the CLI of the terminal device 120. The first link direction configuration may be selected for activation as it is the one coordinated with the neighbor cells.

[0112] In some example embodiments, the at least one set of conditions may include a plurality of sets of conditions associated with activation or deactivation of a plurality of link direction configurations. For example, different thresholds or trigger conditions may be associated with activating or deactivating different link direction configurations. If the first set of conditions is associated with activation of the first link direction configuration,then the satisfaction of the first set of conditions may imply the activation of the first link direction configuration among all the candidate link direction configurations.

[0113] In some example embodiments, the network device 110-1 may transmit (504) the at least one set of conditions to the network device 110-2 to assist the network device 110-2 on the determination of whether the UE served by the network device 110-2 is satisfied the at least one condition. Correspondingly, the network device 110-2 may receive (506) the at least one set of conditions from the network device 110-1.

[0114] The network device 110-1 transmits (526) a first indication of activating the first link direction configuration to the terminal device 120 if a first set of conditions among at least one set of conditions is satisfied based on the result of the at least one measurement, the first link direction configuration indicating a link direction pattern on at least one SBFD time resource. Correspondingly, the terminal device 120 receives (528) the first indication of activating a first link direction configuration from the network device 110-1.

[0115] In some example embodiments, the network device 110-1 may determine a link direction configuration with more UL SBFD time resources if the channel quality of the serving cell getting worse. For example, the network device 110-1 may determine a link direction configuration with less UL SBFD time resources if the CLI is getting worse.

[0116] In some example embodiments, the network device 110-1 may determine the link direction configuration for activation according to the above-mentioned preference information received from the terminal device 120.

[0117] In some example embodiments, the first indication may include a PLD ID if a plurality of link direction configurations has been configured to the terminal device 120. For instance, three PLD ID are provided with a corresponding preferred link direction pattern [DDDUU, DDUUU, DUUUU] each triggered when reaching a RSRP equal or lower than [-100, -120, -140] dBm. This would force the UE to use more slots for UL transmission as it gets farther and farther from the serving cell.

[0118] After the activation, the terminal device 120 may apply the activated link direction configuration. Based on the activated first link direction configuration, the terminal device 120 may perform (532) uplink or downlink communication between the terminal device 120 and the network device 110-1 on a respective one of the at least oneSBFD time resource. Correspondingly, the network device 110-1 may perform (534) uplink or downlink communication between the terminal device 120 and the network device 110-1 on a respective one of the at least one SBFD time resource.

[0119] In some example embodiments, the network device 110-1 may transmit information about activating the first link direction configuration to the network device 110-2. Correspondingly, the network device 110-2 may receive the information about activating the first link direction configuration from the network device 110-1. The network device 110-2 may also activate the first link direction configuration. Alternatively, the information about activating the first link direction configuration may not need to be transmitted to the network device 110-2 if the link direction configuration is configured periodic or valid for certain time between the network devices.

[0120] In some example embodiments, deactivation of the first link direction configuration may be determined (535) the terminal device 120, the network device 110-1, and / or the network device 110-2 based on an agreed criteria.

[0121] Specifically, the terminal device 120 may deactivate the first link direction configuration in response to receiving an indication of deactivating the first link direction configuration from the network device 110-1. For example, the terminal device 120 may deactivate the first link direction configuration in response to receiving a second indication of deactivating the first link direction configuration or a third indication of activating a second link direction configuration indicating at least one further link direction pattern on at least one SBFD time resource from the network device 110-1. In another example, the terminal device 120 may deactivate the first link direction configuration in response to expiry of a timer being started upon activation of the first link direction configuration. The timer may be configured by the network device 110-1, e.g., as an activation time period for the first direction configuration. For example, the terminal device 120 may deactivate the first link direction configuration in response to expiry of a timer being started upon activation of the first link direction configuration. For example, the terminal device 120 may deactivate the first link direction configuration in response to the maximum number of frames that has been reached.

[0122] The network device 110-1 may deactivate the first link direction configuration based at least one of the following: receiving a fourth indication of deactivating the first link direction configuration from at least one network device 110-2, transmitting a fifthindication of deactivating the first link direction configuration to the at least one network device 110-2, expiry of a timer being started upon activation of the first link direction configuration, or activation of a second link direction configuration. In some example embodiments, if it is the network device 110-1 which is responsible for determining whether a deactivation condition is satisfied. Then in response to deactivation of the first link direction configuration, the network device 110-1 may transmit the second indication of deactivating the first link direction configuration to the terminal device 120, to inform the terminal device 120 of the deactivation.

[0123] In some example embodiments, the terminal device 120 may transmit the measurement report to the network device 110-1 periodically or in any other suitable way. The at least one set of conditions may further comprise a second set of conditions associated with deactivation of the first link direction configuration. Then the network device 110-1 may determine whether the second set of conditions is satisfied or the first set of conditions are no longer satisfied based on a result of at least one further measurement reported from the terminal device 120. If it is determined that the second set of conditions is satisfied or the first set of conditions are no longer satisfied, then the network device 110-1 may transmit, to the terminal device 120, a second indication of deactivating the first link direction configuration.

[0124] In some examples, the second set of conditions may be configured with the same or different thresholds as in the first set of conditions, but the satisfaction of the second set of conditions is different from that of the first set of conditions. For example, the network device 110-1 may determine that at least one condition in the second set is satisfied if a first measurement (e.g., the measured SS-RSRP or CSI-RSRP) is higher than a third quality threshold (e.g., a SS-RSRP threshold or a CSI-RSRP threshold), which may indicate that the terminal device 120 is not in the cell edge. Alternatively, or in addition, the network device 110-1 may further determine that at least one further condition in the second set is satisfied if a second measurement (e.g., the measured CLI-RSSI or SRS-RSRP) is lower than a fourth power threshold (e.g., a CLI-RSSI threshold or an SRS-RSRP threshold), which may indicate that the terminal device 120 is not experiencing high CLI. In this case, the network device 110-1 may determine to deactivate the first link direction configuration.

[0125] In some example embodiments, the network device 110-2 may also determinewhether the first link direction configuration is now deactivated in the cell of the network device 110-1, e.g., if the activation time period for the first link configuration is provided by the network device 110-1 previously.

[0126] In the example embodiments related to the signaling flow 500B, the terminal device may be configured with the conditions related to the measurements. Instead of reporting the measurements, the e terminal device may assess the whether the conditions are satisfied and report a result of the assessment to the network device. Then the activation of a link direction configuration may be determined by the network device, based on the reported result of the assessment.

[0127] Reference is now made to FIG. 5B. In the signaling flow 500B, the acts 502-512 of FIG. 5B are the same as those in FIG. 5 A and description thereof is omitted herein.

[0128] The network device 110-1 transmits (536) at least one measurement configuration and at least one set of conditions to the terminal device 120. Correspondingly, the terminal device 120 receives (538) the at least one measurement configuration and at least one set of conditions from the network device 110-1. The measurement configuration and the conditions are similar as those discussed above with reference to FIG. 5A.

[0129] The terminal device 120 performs (542) at least one measurement with respect to at least one of a serving cell of the terminal device 120 or at least one neighbor cell based on the at least one measurement configuration.

[0130] The terminal device 120 determines (544) whether a first set of conditions among at least one set of conditions is satisfied based on the result of the at least one measurement. The at least one set of conditions may include at least one first condition associated with at least one first measurement on the channel quality of the serving cell, or at least one second condition associated with at least one second measurement on the CLI.

[0131] The determination of satisfaction of the conditions by the terminal device 120 may be similar as the determination performed by the network device 110-1 as discussed above. The difference is that the conditions (e.g., the respective thresholds) are now configured to and used by the terminal device 120.

[0132] For example, the terminal device 120 may determine that at least one firstcondition is satisfied if the channel quality of the serving cell is below a quality threshold based on the at least one first measurement. The terminal device 120 may determine that the at least one second condition is satisfied if a power of the CLI is above a power threshold based on the at least one second measurement.

[0133] In some example embodiments, the terminal device 120 may determine that the first set of conditions is satisfied if the measured SS-RSRP or CSI-RSRP is below a first quality threshold based on the at least one first measurement. In some example embodiments, the terminal device 120 may determine that the first set of conditions is satisfied if the measured CLI-RSSI or SRS-RSRP is above a second power threshold based on the at least one second measurement. In some example embodiments, a different threshold may be configured to each of the measurement configurations respectively.

[0134] The terminal device 120 transmits (546), to the network device 110-1, indication information indicative of the first set of conditions being satisfied if a first set of conditions among the at least one set of conditions is satisfied based on a result of the at least one measurement. Correspondingly, the network device 110-1 receives (548) the indication information from the terminal device 120.

[0135] In some example embodiments, the indication information may be an indication with a single bit, to indicate that satisfaction of the first set of conditions, if the first set of conditions is the only set of conditions configured to the terminal device 120. In some example embodiments, if more than one set of conditions (which may be associated with different link direction configurations) is configured to the terminal device 120, the terminal device 120 may indicate to the network device 110-1 which one of those sets of conditions is satisfied.

[0136] In some example embodiments, the terminal device 120 may or may not transmit the result of the at least one measurement to the network device 110-1.

[0137] The network device 110-1 may determine a link direction configuration based on the indication information received from the terminal device 120 which indicates that the first set of conditions being satisfied. The satisfaction of the first set of conditions may be in a cell edge and / or suffering from high CLI. For such a terminal device, a link direction pattern may be configured for the SBFD time resources of the terminal device.

[0138] For example, the network device 110-1 may determine a link directionconfiguration with more UL SBFD time resources if the channel quality of the serving cell getting worse. For another example, the network device 110-1 may determine a link direction configuration with less UL SBFD time resources if the CLI is getting worse.

[0139] In some example embodiments, the indication information may include a preferred link direction configuration index PLD ID if the terminal device 120 is configured with a plurality of link direction configurations. The network device 110-1 may determine a link direction configuration to be activated according to the link direction configuration index PLD ID.

[0140] In some example embodiments, a PLD ID corresponds to a link direction configuration with more UL resources may be determined to be activated if the measured channel quality getting worse. For example, a PLD ID with corresponding preferred link direction pattern [DDDUU, DDUUU, DUUUU] each triggered when reaching a RSRP equal or lower than [-100, -120, -140] dBm. This would force the terminal device 120 to use more slots for UL transmission as it gets farther and farther from the serving cell.

[0141] In some example embodiments, the terminal device 120 may transmit, to the network device 110-1, preference information indicating at least one of the following: a preferred link direction on the at least one SBFD time resource, or an indication of a preferred link direction pattern on the at least one SBFD time resource. The preference information is determined based on a type of traffic of the terminal device 120. Correspondingly, the network device 110-1 may receive the preference information from the terminal device 120. In some example embodiments, the preference information may be included in or indicated by the indication information. In some example embodiments, the network device 110-1 may determine the link direction configuration for activation according to the preference information received from the terminal device 120.

[0142] The network device 110-1 transmits (552) a first indication of activating a first link direction configuration to the terminal device 120. Correspondingly, the terminal device 120 receives (554) the first indication from the network device 110-1. The first link direction configuration indicating a link direction pattern on at least one SBFD time resource. In some example embodiments, the link direction pattern indicated by the first link direction configuration may include at least one of a link direction on a frame configuration comprising at least one SBFD time resource, a link direction on a SBFD slot, or a link direction on a SBFD symbol. In some example embodiments, the linkdirection configuration may be transmitted via RRC signaling.

[0143] The acts 532-535 of FIG. 5B are the same as those in FIG. 5A and description thereof is omitted herein.

[0144] In some example embodiments, the terminal device 120 may perform the measurement periodically or in any other suitable way. The at least one set of conditions may further comprise a second set of conditions associated with deactivation of the first link direction configuration. Then the terminal device 120 may determine whether the second set of conditions is satisfied or the first set of conditions are no longer satisfied based on a result of at least one further obtained measurement. If it is determined that the second set of conditions is satisfied or the first set of conditions are no longer satisfied, then the terminal device 120 may transmit, to the network device 110-1, indication information indicative of the second set of conditions being satisfied or the first set of conditions is not satisfied. Upon receiving such indication information, the network device 110-1 may determine that the terminal device 120 is not in the cell edge and / or not experiencing high CLI. The network device 110-1 may transmit to the terminal device 120 a second indication of deactivating the first link direction configuration.

[0145] In the example embodiments related to the signaling flow 500C, the activation of a link direction configuration may be autonomously determined by the terminal device. For example, if the terminal device 120 receive, e.g., from the network device 110-1, a third indication of activating a second link direction configuration different from the current first link direction configuration, the terminal device 120 may determine that the first link direction configuration is deactivated. In some examples, the terminal device 120 may start a timer upon activation of the first link direction configuration and determine to deactivate the first link direction configuration if the timer is expired.

[0146] In the signaling flow 500C, the acts 502-538 of FIG. 5C are the same as those in FIG. 5B and description thereof is omitted herein.

[0147] Different from the signaling flow 500B, after determining that a first set of conditions among the at least one set of conditions is satisfied based on a result of the at least one measurement, the terminal device 120 activates (556) the first link direction configuration of the at least one link direction configuration itself, without confirmation from the network device.

[0148] In some example embodiments, the terminal device 120 may transmit (558) a first indication that the first link configuration of the at least one of link direction configuration is activated to the network device 110-1, to allow the network device 110-1 be aware of the active status of the first link direction configuration. This indication may be a single bit indication, or alternatively, it can contain a preferred PLD configuration index (if the UE is configured with multiple PLD to begin with), or the UE can simply report the measurements and start assuming PLD configuration by the time of the reporting. Correspondingly, the network device 110-1 may receive (562) the first indication from the terminal device 120. In some example embodiments, the first indication may be an indication with a single bit. In some example embodiments, the first indication may an indication with the index of the link direction configuration PLD ID.

[0149] The acts 532-535 of FIG. 5C are the same as those in FIG. 5A and description thereof is omitted herein.

[0150] In some example embodiments, the terminal device 120 may perform the measurement periodically or in any other suitable way. The at least one set of conditions may further comprise a second set of conditions associated with deactivation of the first link direction configuration. Then the terminal device 120 may determine whether the second set of conditions is satisfied or the first set of conditions are no longer satisfied based on a result of at least one further obtained measurement. If it is determined that the second set of conditions is satisfied or the first set of conditions are no longer satisfied, then the terminal device 120 may transmit, to the network device 110-1, a second indication of deactivating the first link direction configuration.

[0151] In some examples, the second set of conditions may be configured with the same or different thresholds as in the first set of conditions, but the satisfaction of the second set of conditions is different from that of the first set of conditions. For example, the terminal device 120 may determine that at least one condition in the second set is satisfied if a first measurement (e.g., the measured SS-RSRP or CSLRSRP) is higher than a third quality threshold (e.g., a SS-RSRP threshold or a CSLRSRP threshold), which may indicate that the terminal device 120 is not in the cell edge. Alternatively, or in addition, the terminal device 120 may further determine that at least one further condition in the second set is satisfied if a second measurement (e.g., the measured CLI-RSSI or SRS-RSRP) is lower than a fourth power threshold (e.g., a CLI-RSSI threshold or an SRS-RSRP threshold), which may indicate that the terminal device 120 is not experiencing high CLI. In this case, the terminal device 120 may determine to deactivate the first link direction configuration.

[0152] In some example embodiments, as discussed in the signaling flow 500A, it may be the network device 110-1 which determine when to activate another link direction configuration (e.g., a second link direction configuration). The terminal device 120 may receive, from the network device 110-1, a third indication of activating a second link direction configuration and then decide to deactivate the current first link direction configuration. As another example, the terminal device 120 may start a timer upon activation of the first link direction configuration and determine to deactivate the first link direction configuration if the timer is expired.

[0153] FIG. 8A illustrates a signaling flow 800A of a first alternative implementation according to some example embodiments of the present disclosure. For the purpose of illustration, the signaling flow 800A is described with respect to FIG. 1. The signaling flow 800A involves the terminal device 120 and the network device 110-1 and 110-2. The terminal device 120 may be an SBFD aware terminal device, for example, an SBFD aware UE. The network device 110-1 provides a serving cell for the terminal device 120, and the network device 110-2 provides a neighbor cell which may be a serving cell for another terminal device.

[0154] The network device 110-1 may transmit (802) the proposed PLD configuration to the network device 110-2. The network device 110-2 may transmit (804) an acknowledgement to the network device 110-1.

[0155] The network devices 110-1 and 110-2 may firstly coordinate a preferred link direction for at least one SBFD time resource in the SBFD configuration. The preferred link direction may be configured (but not activated) for some or all terminal devices in the cell using UE-specific or cell-specific signaling. Optionally or additionally, deactivation criteria can also be exchanged between the network devices 110-1 and 110-2, such as: a timer, validity frame counter, or receiving a new preferred link direction indication.

[0156] The network device 110-1 may transmit (806) at least one configured PLD configuration to the terminal device 120. In some example embodiments, the network device 110-1 may transmit a plurality of PLD configurations to the terminal device 120.

[0157] The network device 110-1 may transmit (808) at least one measurement configuration to the terminal device 120. The terminal device 120 may perform (812) at least one measurements based on the at least one measurement configuration. The at least one measurements include at least one of SS-RSRP or CSI-RSRP, or at least one of CLI-RSSI or SRS-RSRP.

[0158] The terminal device 120 may transmit (814) the measurement report to the network device 110-1. The network device 110-1 may perform (616) assessment of whether the triggering conditions have been met. In response to that at least one of the trigging conditions has been met, the network device 110-1 may active the PLD configuration and transmit (818) an indication of activating the PLD configuration to the terminal device 120. The network device 110-1 may assess that the triggering conditions is met if measured SS-RSRP or CSI-RSRP is lower than a first configured threshold or the measured CLI-RSSI or SRS-RSRP is higher than a second configured threshold.

[0159] The activation of the PLD configuration is done by the network device 110-1 based on the measurement reports transmitted by the terminal device 120. Upon receiving the measurement report, the network device 110-1 decides whether the terminal device is a candidate for PLD activation.

[0160] The terminal device 120 may apply the PLD configuration after the reception of the activation indication. Optionally, the network device 110-1 may transmit a message to the network device 110-2 to inform about the activation of the PLD configuration. The PLD configuration will also be applied by the network device 110-2. Alternatively, there is no activation message required across the network devices if the PLD configuration is assumed to be periodical or valid for a certain time between cells. It should be noted that the PLD configurations are only applied to the terminal device satisfying at least one of the activating conditions, and other terminal device will continue using SBFD without link direction scheduling restrictions.

[0161] The terminal device 120 and the network device 110-1 may perform (822) deactivation of the PLD configuration if the configured conditions have been met.

[0162] In some example embodiments, if a timer or a valid frame counter is configured to the terminal device 120 or the network device 110-1, the terminal device 120 or the network device 110-1 may determine to deactivate the PLD configuration when a timer expired, or a maximum number of the valid frames is reached.

[0163] In some example embodiments, the network device 110-1 may determine to deactivate the PLD configuration and transmit a deactivating indication to the terminal device 120 if the measurement result from the terminal device 120 does not satisfy the triggering conditions.

[0164] In some example embodiments, the network device 110-1 may determine to deactivate the PLD configuration and transmit a deactivating indication to the terminal device 120 upon receiving a deactivating indication from the network device 110-2.

[0165] The network device 110-1 may and the network device 110-2 may perform (824) deactivation of the PLD configuration if the configured conditions have been met.

[0166] In some example embodiments, the network device 110-1 may transmit a deactivating indication to the network device 110-2 if the terminal device 120 or the network device 110-1 has determined to deactivate the PLD configuration.

[0167] In some example embodiments, the network device 110-2 may transmit a deactivating indication to the network device 110-1 if the network device 110-2 has determined to deactivate the PLD configuration. In some example embodiments, the network device 110-2 may transmit a deactivating indication to the network device 110-1 if a new PLD configuration has been proposed and agreed with the network device 110-1.

[0168] FIG. 8B illustrates a signaling flow 800B of a second alternative implementation according to some example embodiments of the present disclosure. For the purpose of illustration, the signaling flow 800B is described with respect to FIG. 1. The signaling flow 800B involves the terminal device 120 and the network device 110-1 and 110-2. The terminal device 120 may be an SBFD aware terminal device, for example, an SBFD aware UE. The network device 110-1 provides a serving cell for the terminal device 120, and the network device 110-2 provides a neighbor cell which may be a serving cell for another terminal device.

[0169] The acts 802-508 of FIG. 8B are the same as those in FIG. 8A and description thereof is omitted herein. The network device 110-1 may transmit (826) the configured thresholds to the terminal device 120. The configured thresholds may include a first configured threshold for the channel quality and a second configured threshold for the CLI.

[0170] The terminal device 120 may perform (828) an assessment that whether the measured SS-RSRP or CSI-RSRP is lower than a first configured threshold. The terminal device 120 may perform (832) an assessment that whether the measured CLI-RSSI or SRS-RSRP is higher than a second configured threshold.

[0171] The terminal device 120 may assess that the triggering conditions is met if measured SS-RSRP or CSI-RSRP is lower than a first configured threshold (i.e., whether the terminal device 120 is at the edge area of the serving cell) or the measured CLI-RSSI or SRS-RSRP is higher than a second configured threshold (i.e., whether the terminal device 120 is being interfered by the CLI).

[0172] The terminal device 120 may perform (834) an assessment that whether at least one of the thresholds is met and transmit (836) information that the configured conditions for the PLC configuration have been met to the network device 110-1.

[0173] The terminal device 120 and the network device 110-1 may apply (838) the configured PLD.

[0174] The terminal device 120 may apply the PLD configuration. Optionally, the network device 110-1 may transmit a message to the network device 110-2 to inform about the activation of the PLD configuration. The PLD configuration will also be applied by the network device 110-2. Alternatively, there is no activation message required across the network devices if the PLD configuration is assumed to be periodical or valid for a certain time between cells. It should be noted that the PLD configurations are only applied to the terminal device satisfying at least one of the activating conditions, and other terminal device will continue using SBFD without link direction scheduling restrictions.

[0175] The terminal device 120 may perform (842) an assessment that whether the measured SS-RSRP or CSI-RSRP is higher than a third configured threshold and the terminal device 120 may perform (844) an assessment that whether the measured CLI-RSSI or SRS-RSRP is lower than a fourth configured threshold. In some example embodiments, the third threshold may be different from the first threshold and the fourth threshold may be different from the second threshold.

[0176] The terminal device 120 may perform (846) an assessment that whether at least one of the third configured threshold and the fourth configured threshold is met and transmit (836) information that the configured conditions for the PLC configuration areno longer met to the network device 110-1.

[0177] The network device 110-1 and the terminal device 120 may perform (852) deactivation of the PLD configuration if the configured conditions are met.

[0178] In some example embodiments, if a timer or a valid frame counter is configured to the terminal device 120 or the network device 110-1, the terminal device 120 or the network device 110-1 may determine to deactivate the PLD configuration when a timer expired, or a maximum number of the valid frames is reached.

[0179] In some example embodiments, the network device 110-1 may determine to deactivate (854) the PLD configuration and transmit a deactivating indication to the terminal device 120 if the measurement result from the terminal device 120 does not satisfy the triggering conditions. In some example embodiments, the terminal device 120 may determine to deactivate the PLD configuration and transmit a deactivating indication to the terminal device 120 if the measurement result does not satisfy the triggering conditions and expect an acknowledgement form the network device 110-1.

[0180] In some example embodiments, the network device 110-2 may transmit a deactivating indication to the network device 110-1 if the network device 110-2 has determined to deactivate the PLD configuration. In some example embodiments, the network device 110-2 may transmit a deactivating indication to the network device 110-1 if a new PLD configuration has been proposed and agreed with the network device 110-1.

[0181] The common part of both implementations of FIG. 8 A and 8B is that the network devices 110-1 and 110-2 may firstly coordinate a PLD configuration for at least one SBFD time resource in the SBFD configuration. The preferred link direction may be configured (but not activated) for some or all UEs in the cell using UE-specific or cell-specific signaling. Optionally, deactivation criteria can also be exchanged between the neighbor cells, such as: a timer, validity frame counter, or receiving a new preferred link direction indication.

[0182] The two alternative implementations differ in that the PLD configuration is activated by the network device 110-1 or the terminal device 120. In the first alternative implementation, the activation is done by the network device 110-1, based on the measurement reports sent by the terminal device 120. Upon receiving the measurementreport, the network device 110-1 decides whether the terminal device is a candidate for PLD activation. In the second alternative implementation, the activation is autonomously determined by the terminal device 120, based on the measurements and thresholds configured by the network device 110-1. In this case, the terminal device 120 may send a link direction activation to the network device 110-1. This activation may be a single bit indication, or alternatively, it may include a preferred PLD configuration index (if the terminal device 120 is configured with multiple PLD configurations), or the terminal device 120 may simply report the measurements and start assuming PLD configuration by the time of the reporting.

[0183] In both alternative implementations, after the activation, the terminal device 120 will apply the PLD configuration, and optionally the network device 110-1 will send a message to the network device 110-2, informing about the activation. The PLD configuration will also be applied by the network device 110-2. Alternatively, no activation message is required across network devices 110-1 and 110-2 if the PLD configuration is assumed periodic or valid for certain time between cells. The deactivation occurs based on the agreed criteria. It should be noted that the link direction coordination only applies to terminal device which satisfies the configured conditions while other terminal devices will continue using SBFD without link direction scheduling restrictions.

[0184] FIG. 9A shows a flowchart of an example method 900A implemented at a first apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 900A will be described from the perspective of the first apparatus, which may be the terminal device 120 in FIG. 1.

[0185] At block 910, the first apparatus receives, from a second apparatus, at least one measurement configuration.

[0186] At block 920, the first apparatus performs at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell based on the at least one measurement configuration.

[0187] At block 930, the first apparatus transmits, to the second apparatus, at least one measurement report associated with a result of the at least one measurement.

[0188] At block 940, the first apparatus receives, from the second apparatus, a first indication of activating a first link direction configuration, the first link directionconfiguration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[0189] In some example embodiments, the method 900A further comprises: performing uplink or downlink communication on a respective one of the at least one SBFD time resource based on the activated first link direction configuration.

[0190] In some example embodiments, the method 900A further comprises: deactivating the first link direction configuration in response to at least one of: receiving, from the second apparatus, a second indication of deactivating the first link direction configuration, or receiving, from the second apparatus, a third indication of activating a second link direction configuration, the second link direction configuration indicating at least one further link direction pattern on at least one SBFD time resource, or expiry of a timer, the timer being started upon activation of the first link direction configuration.

[0191] In some example embodiments, the first link direction configuration is received from the second apparatus via radio resource control, RRC, signaling.

[0192] In some example embodiments, the method 900A further comprises: receiving, from the second apparatus, a plurality of link direction configurations comprising at least the first link direction configuration; and wherein the first indication comprises an index of the first link direction configuration among the plurality of link direction configurations.

[0193] In some example embodiments, the at least one measurement configuration comprises at least one of: a first measurement configuration for measuring a channel quality of the serving cell, or a second measurement configuration for measuring a cross link interference, CLI, in at least one of the serving cell or the at least one neighbor cell.

[0194] In some example embodiments, the at least one measurement comprises at least one of the following: at least one first measurement on the channel quality of the serving cell which is measured based on the first measurement configuration, or at least one second measurement on the CLI which is measured based on the second measurement configuration.

[0195] In some example embodiments, the method 900A further comprises: transmitting, to the second apparatus, preference information indicating at least one of the following: a preferred link direction on the at least one SBFD time resource, or an indication of apreferred link direction pattern on the at least one SBFD time resource.

[0196] In some example embodiments, the link direction pattern indicated by the first link direction configuration comprises at least one of the following: a link direction on a frame configuration comprising at least one SBFD time resource, a link direction on a SBFD slot, or a link direction on a SBFD symbol.

[0197] In some example embodiments, the first apparatus is or is comprised in a terminal device, and wherein the second apparatus is or is comprised in a network device.

[0198] FIG. 9B shows a flowchart of an example method 900B implemented at a second apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 900B will be described from the perspective of the second apparatus, which may be the network device 110-1 in FIG. 1.

[0199] At block 910, the second apparatus transmits to a first apparatus, at least one measurement configuration.

[0200] At block 920, the second apparatus receives, from the first apparatus, at least one measurement report associated with a result of at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell.

[0201] At block 930, in accordance with a determination that a first set of conditions among at least one set of conditions is satisfied based on the result of the at least one measurement, the second apparatus transmits to the first apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[0202] In some example embodiments, the method 900B further comprises: performing uplink or downlink communication between the first apparatus and the second apparatus on a respective one of the at least one SBFD time resource based on the first link direction configuration.

[0203] In some example embodiments, the at least one measurement configuration comprises at least one of: a first measurement configuration for measuring a channel quality of the serving cell, or a second measurement configuration for measuring a cross link interference, CLI, in at least one of the serving cell or the at least one neighbor cell,and wherein the at least one set of conditions comprises at least one of the following: at least one first condition associated with at least one first measurement on the channel quality of the serving cell, or at least one second condition associated with at least one second measurement on the CLI.

[0204] In some example embodiments, the method 900B further comprises: in accordance with a determination, determining on the at least one first measurement, that the channel quality of the serving cell is below a quality threshold, determining that the at least one first condition is satisfied; and in accordance with a determination, determining on the at least one second measurement, that a power of the CLI is above a power threshold, determining that the at least one second condition is satisfied.

[0205] In some example embodiments, the method 900B further comprises: determining that the first link direction configuration is to be deactivated based on at least one of the following: receiving, from at least one third apparatus providing the at least one neighbor cell, a fourth indication of deactivating the first link direction configuration, transmitting, to the at least one third apparatus, a fifth indication of deactivating the first link direction configuration, expiry of a timer, the timer being started upon activation of the first link direction configuration, or activation of a second link direction configuration; and transmitting, to the first apparatus, a second indication of deactivating the first link direction configuration.

[0206] In some example embodiments, the first link direction configuration is transmitted to the first apparatus via radio resource control, RRC, signaling.

[0207] In some example embodiments, the method 900B further comprises: transmitting, to the first apparatus, a plurality of link direction configurations comprising at least the first link direction configuration; and wherein the first indication comprises an index of the first link direction configuration among the plurality of link direction configurations.

[0208] In some example embodiments, the method 900B further comprises: receiving, from the first apparatus, preference information indicating at least one of the following: a preferred link direction on the at least one SBFD time resource, or an indication of a preferred link direction pattern on the at least one SBFD time resource.

[0209] In some example embodiments, the link direction pattern indicated by the first link direction configuration comprises at least one of the following: a link direction on aframe configuration comprising at least one SBFD time resource, a link direction on a SBFD slot, or a link direction on a SBFD symbol.

[0210] In some example embodiments, the method 900B further comprises: determining the first link direction configuration to be activated in the serving cell based on information received from at least one third apparatus providing the at least one neighbor cell.

[0211] In some example embodiments, the method 900B further comprises: transmitting, to the at least one third apparatus, at least one link direction configuration to be applied in the serving cell, the at least one link direction configuration comprising at least the first link direction configuration; and receiving acknowledgement of the at least one link direction configuration from the at least one third apparatus.

[0212] In some example embodiments, the method 900B further comprises: transmitting, to the at least one third apparatus, an activation time period associated with the first link direction configuration to be activated in the serving cell.

[0213] In some example embodiments, the method 900B further comprises: transmitting, to the at least one third apparatus, the at least one set of conditions to be applied for activation or deactivation of the first link direction configuration.

[0214] FIG. 10A shows a flowchart of an example method 1000 A implemented at a first apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 1000A will be described from the perspective of the first apparatus, which may be the terminal device 120 in FIG. 1.

[0215] At block 1010, receiving, from a second apparatus, at least one measurement configuration and at least one set of conditions.

[0216] At block 1020, performing at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell based on the at least one measurement configuration.

[0217] At block 1030, in accordance with a determination that a first set of conditions among the at least one set of conditions is satisfied based on a result of the at least one measurement, transmitting to the second apparatus, indication information indicative of the first set of conditions being satisfied.

[0218] At block 1040, receiving, from the second apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[0219] In some example embodiments, the method 1000A further comprises: performing uplink or downlink communication between the first apparatus and the second apparatus on a respective one of the at least one SBFD time resource based on the activated first link direction configuration.

[0220] In some example embodiments, the at least one set of conditions comprises a plurality of sets of conditions associated with activation or deactivation of a plurality of link direction configurations, and wherein the first set of conditions is associated with activation of the first link direction configuration.

[0221] In some example embodiments, the at least one measurement configuration comprises at least one of a first measurement configuration for measuring a channel quality of the serving cell, or a second measurement configuration for measuring a cross link interference, CLI, in at least one of the serving cell or the at least one neighbor cell, and wherein each set of conditions among the at least one set of conditions comprises at least one of the following: at least one first condition associated with at least one first measurement on the channel quality of the serving cell, or at least one second condition associated with at least one second measurement on the CLI.

[0222] In some example embodiments, the at least one measurement comprises at least one of the following: at least one first measurement on the channel quality of the serving cell which is measured based on the first measurement configuration, or at least one second measurement on the CLI which is measured based on the second measurement configuration.

[0223] In some example embodiments, the method 1000A further comprises: determining that the first set of conditions is satisfied based on at least one of the following: a determination, based on the at least one first measurement, that the channel quality of the serving cell is below a first quality threshold; and a determination, based on the at least one second measurement, that a power of the CLI is above a second power threshold.

[0224] In some example embodiments, the method 1000A further comprises: in accordance with a determination that the second set of conditions is satisfied based on a result of at least one further measurement, transmit, to the second apparatus, indication information indicative of the second set of conditions being satisfied; and receive, from the second apparatus, a second indication of deactivating the first link direction configuration.

[0225] In some example embodiments, the method 1000A further comprises: deactivating the first link direction configuration in response to at least one of: receiving, from the second apparatus, a third indication of activating a second link direction configuration, the second link direction configuration indicating at least one further link direction pattern on at least one SBFD time resource, or expiry of a timer, the timer being started upon activation of the first link direction configuration.

[0226] In some example embodiments, the method 1000A further comprises: transmitting, to the second apparatus, preference information indicating at least one of the following: a preferred link direction on the at least one SBFD time resource, or an indication of a preferred link direction pattern on the at least one SBFD time resource.

[0227] In some example embodiments, the first link direction configuration is received from the second apparatus via radio resource control, RRC, signaling.

[0228] In some example embodiments, the method 1000 A further comprises: receiving, from the second apparatus, a plurality of link direction configurations comprising at least the first link direction configuration; and wherein the first indication comprises an index of the first link direction configuration among the plurality of link direction configurations.

[0229] In some example embodiments, the link direction pattern indicated by the first link direction configuration comprises at least one of the following: a link direction on a frame configuration comprising at least one SBFD time resource, a link direction on a SBFD slot, or a link direction on a SBFD symbol.

[0230] In some example embodiments, the first apparatus is or is comprised in a terminal device, and wherein the second apparatus is or is comprised in a network device.

[0231] FIG. 10B shows a flowchart of an example method 1000B implemented at a second apparatus in accordance with some example embodiments of the presentdisclosure. For the purpose of discussion, the method 1000B will be described from the perspective of the second apparatus, which may be the network device 110-1 in FIG. 1.

[0232] At block 1010, the second apparatus transmits, to a first apparatus, at least one measurement configuration and at least one set of conditions.

[0233] At block 1020, the second apparatus receives, from the first apparatus, indication information indicative of a first set of conditions among the at least one set of conditions being satisfied.

[0234] At block 1030, the second apparatus transmits, to the first apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[0235] In some example embodiments, the method 1000B further comprises: performing uplink or downlink communication between the first apparatus and the second apparatus on a respective one of the at least one SBFD time resource based on the first link direction configuration.

[0236] In some example embodiments, the method 1000B further comprises: based on reception of the indication information indicative of a first set of conditions being satisfied, determining that the first link direction configuration is to be activated for the first apparatus.

[0237] In some example embodiments, the method 1000B further comprises: determining that the first link direction configuration is to be deactivated based on at least one of the following: receiving, from at least one third apparatus providing the at least one neighbor cell, a fourth indication of deactivating the first link direction configuration, transmitting, to the at least one third apparatus, a fifth indication of deactivating the first link direction configuration, expiry of a timer, the timer being started upon activation of the first link direction configuration, or activation of a second link direction configuration; and transmitting, to the first apparatus, a second indication of deactivating the first link direction configuration.

[0238] In some example embodiments, the first link direction configuration is transmitted to the first apparatus via radio resource control, RRC, signaling.

[0239] In some example embodiments, the method 1000B further comprises: transmitting, to the first apparatus, a plurality of link direction configurations comprising at least the first link direction configuration; and wherein the first indication comprises an index of the first link direction configuration among the plurality of link direction configurations.

[0240] In some example embodiments, the method 1000B further comprises: receiving, from the first apparatus, preference information indicating at least one of the following: a preferred link direction on the at least one SBFD time resource, or an indication of a preferred link direction pattern on the at least one SBFD time resource.

[0241] In some example embodiments, the link direction pattern indicated by the first link direction configuration comprises at least one of the following: a link direction on a frame configuration comprising at least one SBFD time resource, a link direction on a SBFD slot, or a link direction on a SBFD symbol.

[0242] In some example embodiments, the method 1000B further comprises: determining the first link direction configuration to be activated in the serving cell based on information received from at least one third apparatus providing the at least one neighbor cell.

[0243] In some example embodiments, the method 1000B further comprises: transmitting, to the at least one third apparatus, at least one link direction configuration to be applied in the serving cell, the at least one link direction configuration comprising at least the first link direction configuration; and receiving acknowledgement of the at least one link direction configuration from the at least one third apparatus.

[0244] In some example embodiments, the method 1000B further comprises: transmitting, to the at least one third apparatus, an activation time period associated with the first link direction configuration to be activated in the serving cell.

[0245] In some example embodiments, the method 1000B further comprises: transmitting, to the at least one third apparatus, the at least one set of conditions to be applied for activation or deactivation of the first link direction configuration.

[0246] FIG. 11 A shows a flowchart of an example method 1 lOOAimplemented at a first apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 1 lOOAwill be described from the perspective of thefirst apparatus, which may be the terminal device 120 in FIG. 1.

[0247] At block 1110, the first apparatus receives, from a second apparatus, at least one measurement configuration and at least one set of conditions.

[0248] At block 1120, the first apparatus performs at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell based on the at least one measurement configuration.

[0249] At block 1130, in accordance with a determination that a first set of conditions among the at least one set of conditions is satisfied based on a result of the at least one measurement, the first apparatus activates e a first link direction configuration of the at least one link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[0250] In some example embodiments, the method 1100A further comprises: transmitting, to the second apparatus, a first indication that the first link configuration of the at least one of link direction configuration is activated.

[0251] In some example embodiments, the method 1100A further comprises: receiving, from the second apparatus, at least one link direction configuration comprising at least the first link direction configuration.

[0252] In some example embodiments, the method 1100A further comprises: in accordance with a determination that the first set of conditions associated with activation of the first link direction configuration is satisfied, activate the first link direction configuration.

[0253] In some example embodiments, the method 1100A further comprises: in accordance with a determination that the second set of conditions is satisfied based on a result of at least one further measurement, deactivate the first link direction configuration; and transmit, to the second apparatus, a second indication that the first link direction configuration is deactivated.

[0254] In some example embodiments, the method 1100A further comprises: deactivating the first link direction configuration in response to at least one of: receiving, from the second apparatus, a third indication of activating a second link direction configuration, the second link direction configuration indicating at least one further linkdirection pattern on at least one SBFD time resource, receiving, from the second apparatus, a third indication of deactivating the first link direction configuration, or expiry of a timer, the timer being started upon activation of the first link direction configuration.

[0255] In some example embodiments, the method 1100A further comprises: performing uplink or downlink communication between the first apparatus and the second apparatus on a respective one of the at least one SBFD time resource based on the activated first link direction configuration.

[0256] In some example embodiments, the at least one measurement configuration comprises at least one of a first measurement configuration for measuring a channel quality of the serving cell, or a second measurement configuration for measuring a cross link interference, CLI, in at least one of the serving cell or the at least one neighbor cell, and wherein each set of conditions among the at least one set of conditions comprises at least one of the following: at least one first condition associated with at least one first measurement on the channel quality of the serving cell, or at least one second condition associated with at least one second measurement on the CLI.

[0257] In some example embodiments, the at least one measurement comprises at least one of the following: at least one first measurement on the channel quality of the serving cell which is measured based on the first measurement configuration, or at least one second measurement on the CLI which is measured based on the second measurement configuration.

[0258] In some example embodiments, the method 1100A further comprises: determining that the first set of conditions is satisfied based on at least one of the following: a determination, based on the at least one first measurement, that the channel quality of the serving cell is below a first quality threshold; and a determination, based on the at least one second measurement, that a power of the CLI is above a second power threshold.

[0259] In some example embodiments, the first link direction configuration is received from the second apparatus via radio resource control, RRC, signaling

[0260] In some example embodiments, the link direction pattern indicated by the first link direction configuration comprises at least one of the following: a link direction on a frame configuration comprising at least one SBFD time resource, a link direction on aSBFD slot, or a link direction on a SBFD symbol.

[0261] In some example embodiments, the first apparatus is or is comprised in a terminal device, and wherein the second apparatus is or is comprised in a network device.

[0262] FIG. 11B shows a flowchart of an example method 1100B implemented at a second apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 1100B will be described from the perspective of the second apparatus, which may be the network device 110-1 in FIG. 1.

[0263] At block 1110, the second apparatus transmits, to a first apparatus, at least one link direction configuration, the at least one link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[0264] At block 1120, the second apparatus transmits, to the first apparatus, at least one measurement configuration and at least one set of conditions.

[0265] At block 1130, the second apparatus receives, from the first apparatus, a first indication that the first link configuration of the at least one of link direction configuration is activated.

[0266] In some example embodiments, the method 1100B further comprises: performing uplink or downlink communication between the first apparatus and the second apparatus on a respective one of the at least one SBFD time resource based on the first link direction configuration.

[0267] In some example embodiments, the method 1100B further comprises: receiving, from the first apparatus, a second indication that the first link direction configuration is deactivated.

[0268] In some example embodiments, the method 1100B further comprises: determining that the first link direction configuration is to be deactivated based on at least one of the following: receiving, from at least one third apparatus providing the at least one neighbor cell, a fourth indication of deactivating the first link direction configuration, transmitting, to the at least one third apparatus, a fifth indication of deactivating the first link direction configuration, expiry of a timer, the timer being started upon activation of the first link direction configuration, or transmitting, to the first apparatus, a third indication of deactivating the first link direction configuration.

[0269] In some example embodiments, the first apparatus is further caused to: transmitting, to the first apparatus, at least one link direction configuration comprising at least the first link direction configuration.

[0270] In some example embodiments, the first link direction configuration is transmitted to the first apparatus via radio resource control, RRC, signaling.

[0271] In some example embodiments, the link direction pattern indicated by the first link direction configuration comprises at least one of the following: a link direction on a frame configuration comprising at least one SBFD time resource, a link direction on a SBFD slot, or a link direction on a SBFD symbol.

[0272] In some example embodiments, the method 1100B further comprises: transmitting, to at least one third apparatus providing the at least one neighbor cell, at least one link direction configuration to be applied in the serving cell, the at least one link direction configuration comprising at least the first link direction configuration; and receiving acknowledgement of the at least one link direction configuration from the at least one third apparatus.

[0273] In some example embodiments, the method 1100B further comprises: transmitting, to the at least one third apparatus, an activation time period associated with the at least one link direction configuration to be applied in the serving cell.

[0274] In some example embodiments, the method 1100B further comprises: transmitting, to the at least one third apparatus, the at least one set of conditions to be applied for activation or deactivation of the first link direction configuration.

[0275] In some example embodiments, a first apparatus capable of performing any of the method 900A (for example, the terminal device 120 in FIG. 1) may comprise means for performing the respective operations of the method 900A. 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 terminal device 120 in FIG. 1.

[0276] In some example embodiments, the first apparatus comprises means for receiving, from a second apparatus, at least one measurement configuration; means for performing at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell based on the at least one measurement configuration; meansfor transmitting, to the second apparatus, at least one measurement report associated with a result of the at least one measurement; and means for receiving, from the second apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[0277] In some example embodiments, the first apparatus further comprises: means for performing uplink or downlink communication on a respective one of the at least one SBFD time resource based on the activated first link direction configuration.

[0278] In some example embodiments, the first apparatus further comprises: means for deactivating the first link direction configuration in response to at least one of: receiving, from the second apparatus, a second indication of deactivating the first link direction configuration, or receiving, from the second apparatus, a third indication of activating a second link direction configuration, the second link direction configuration indicating at least one further link direction pattern on at least one SBFD time resource, or expiry of a timer, the timer being started upon activation of the first link direction configuration.

[0279] In some example embodiments, the first link direction configuration is received from the second apparatus via radio resource control, RRC, signaling.

[0280] In some example embodiments, the first apparatus further comprises: means for receiving, from the second apparatus, a plurality of link direction configurations comprising at least the first link direction configuration; and wherein the first indication comprises an index of the first link direction configuration among the plurality of link direction configurations.

[0281] In some example embodiments, the at least one measurement configuration comprises at least one of: a first measurement configuration for measuring a channel quality of the serving cell, or a second measurement configuration for measuring a cross link interference, CLI, in at least one of the serving cell or the at least one neighbor cell.

[0282] In some example embodiments, the at least one measurement comprises at least one of the following: at least one first measurement on the channel quality of the serving cell which is measured based on the first measurement configuration, or at least one second measurement on the CLI which is measured based on the second measurement configuration.

[0283] In some example embodiments, the first apparatus further comprises: means for transmitting, to the second apparatus, preference information indicating at least one of the following: a preferred link direction on the at least one SBFD time resource, or an indication of a preferred link direction pattern on the at least one SBFD time resource.

[0284] In some example embodiments, the link direction pattern indicated by the first link direction configuration comprises at least one of the following: a link direction on a frame configuration comprising at least one SBFD time resource, a link direction on a SBFD slot, or a link direction on a SBFD symbol.

[0285] In some example embodiments, the first apparatus is or is comprised in a terminal device, and wherein the second apparatus is or is comprised in a network device.

[0286] In some example embodiments, a second apparatus capable of performing any of the method 900B (for example, the network device 110-1 in FIG. 1) may comprise means for performing the respective operations of the method 900B. 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 network device 110-1 in FIG. 1.

[0287] In some example embodiments, the second apparatus comprises means for transmitting, to a first apparatus, at least one measurement configuration; means for receiving, from the first apparatus, at least one measurement report associated with a result of at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell; and means for in accordance with a determination that a first set of conditions among at least one set of conditions is satisfied based on the result of the at least one measurement, transmitting to the first apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[0288] In some example embodiments, the second apparatus further comprises: means for performing uplink or downlink communication between the first apparatus and the second apparatus on a respective one of the at least one SBFD time resource based on the first link direction configuration.

[0289] In some example embodiments, the at least one measurement configurationcomprises at least one of: a first measurement configuration for measuring a channel quality of the serving cell, or a second measurement configuration for measuring a cross link interference, CLI, in at least one of the serving cell or the at least one neighbor cell, and wherein the at least one set of conditions comprises at least one of the following: at least one first condition associated with at least one first measurement on the channel quality of the serving cell, or at least one second condition associated with at least one second measurement on the CLI.

[0290] In some example embodiments, the second apparatus further comprises: means for in accordance with a determination, determining Ing on the at least one first measurement, that the channel quality of the serving cell is below a quality threshold, determining that the at least one first condition is satisfied; and means for in accordance with a determination, determining Ing on the at least one second measurement, that a power of the CLI is above a power threshold, determining that the at least one second condition is satisfied.

[0291] In some example embodiments, the second apparatus further comprises: means for determining that the first link direction configuration is to be deactivated based on at least one of the following: receiving, from at least one third apparatus providing the at least one neighbor cell, a fourth indication of deactivating the first link direction configuration, transmitting, to the at least one third apparatus, a fifth indication of deactivating the first link direction configuration, expiry of a timer, the timer being started upon activation of the first link direction configuration, or activation of a second link direction configuration; and means for transmitting, to the first apparatus, a second indication of deactivating the first link direction configuration.

[0292] In some example embodiments, the first link direction configuration is transmitted to the first apparatus via radio resource control, RRC, signaling.

[0293] In some example embodiments, the second apparatus further comprises: means for transmitting, to the first apparatus, a plurality of link direction configurations comprising at least the first link direction configuration; and wherein the first indication comprises an index of the first link direction configuration among the plurality of link direction configurations.

[0294] In some example embodiments, the second apparatus further comprises: means for receiving, from the first apparatus, preference information indicating at least one ofthe following: a preferred link direction on the at least one SBFD time resource, or an indication of a preferred link direction pattern on the at least one SBFD time resource.

[0295] In some example embodiments, the link direction pattern indicated by the first link direction configuration comprises at least one of the following: a link direction on a frame configuration comprising at least one SBFD time resource, a link direction on a SBFD slot, or a link direction on a SBFD symbol.

[0296] In some example embodiments, the second apparatus further comprises: means for determining the first link direction configuration to be activated in the serving cell based on information received from at least one third apparatus providing the at least one neighbor cell.

[0297] In some example embodiments, the second apparatus further comprises: means for transmitting, to the at least one third apparatus, at least one link direction configuration to be applied in the serving cell, the at least one link direction configuration comprising at least the first link direction configuration; and means for receiving acknowledgement of the at least one link direction configuration from the at least one third apparatus.

[0298] In some example embodiments, the second apparatus further comprises: means for transmitting, to the at least one third apparatus, an activation time period associated with the first link direction configuration to be activated in the serving cell.

[0299] In some example embodiments, the second apparatus further comprises: means for transmitting, to the at least one third apparatus, the at least one set of conditions to be applied for activation or deactivation of the first link direction configuration.

[0300] In some example embodiments, a first apparatus capable of performing any of the method 1000A (for example, the terminal device 120 in FIG. 1) may comprise means for performing the respective operations of the method 1000 A. 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 terminal device 120 in FIG. 1.

[0301] In some example embodiments, the first apparatus comprises means for receiving, from a second apparatus, at least one measurement configuration and at least one set of conditions; means for performing at least one measurement with respect to at least one ofa serving cell of the first apparatus or at least one neighbor cell based on the at least one measurement configuration; means for in accordance with a determination that a first set of conditions among the at least one set of conditions is satisfied based on a result of the at least one measurement, transmitting to the second apparatus, indication information indicative of the first set of conditions being satisfied; and means for receiving, from the second apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one subband full duplex, SBFD, time resource.

[0302] In some example embodiments, the first apparatus further comprises: means for performing uplink or downlink communication between the first apparatus and the second apparatus on a respective one of the at least one SBFD time resource based on the activated first link direction configuration.

[0303] In some example embodiments, the at least one set of conditions comprises a plurality of sets of conditions associated with activation or deactivation of a plurality of link direction configurations, and wherein the first set of conditions is associated with activation of the first link direction configuration.

[0304] In some example embodiments, the at least one measurement configuration comprises at least one of a first measurement configuration for measuring a channel quality of the serving cell, or a second measurement configuration for measuring a cross link interference, CLI, in at least one of the serving cell or the at least one neighbor cell, and wherein each set of conditions among the at least one set of conditions comprises at least one of the following: at least one first condition associated with at least one first measurement on the channel quality of the serving cell, or at least one second condition associated with at least one second measurement on the CLI.

[0305] In some example embodiments, the at least one measurement comprises at least one of the following: at least one first measurement on the channel quality of the serving cell which is measured based on the first measurement configuration, or at least one second measurement on the CLI which is measured based on the second measurement configuration.

[0306] In some example embodiments, the first apparatus further comprises: means for determining that the first set of conditions is satisfied based on at least one of the following: a determination, based on the at least one first measurement, that the channelquality of the serving cell is below a first quality threshold; and a determination, based on the at least one second measurement, that a power of the CLI is above a second power threshold.

[0307] In some example embodiments, the first apparatus further comprises: in accordance with a determination that the second set of conditions is satisfied based on a result of at least one further measurement, transmit, to the second apparatus, indication information indicative of the second set of conditions being satisfied; and receive, from the second apparatus, a second indication of deactivating the first link direction configuration.

[0308] In some example embodiments, the first apparatus further comprises: means for deactivating the first link direction configuration in response to at least one of: receiving, from the second apparatus, a third indication of activating a second link direction configuration, the second link direction configuration indicating at least one further link direction pattern on at least one SBFD time resource, or expiry of a timer, the timer being started upon activation of the first link direction configuration.

[0309] In some example embodiments, the first apparatus further comprises: means for transmitting, to the second apparatus, preference information indicating at least one of the following: a preferred link direction on the at least one SBFD time resource, or an indication of a preferred link direction pattern on the at least one SBFD time resource.

[0310] In some example embodiments, the first link direction configuration is received from the second apparatus via radio resource control, RRC, signaling.

[0311] In some example embodiments, the first apparatus further comprises: means for receiving, from the second apparatus, a plurality of link direction configurations comprising at least the first link direction configuration; and wherein the first indication comprises an index of the first link direction configuration among the plurality of link direction configurations.

[0312] In some example embodiments, the link direction pattern indicated by the first link direction configuration comprises at least one of the following: a link direction on a frame configuration comprising at least one SBFD time resource, a link direction on a SBFD slot, or a link direction on a SBFD symbol.

[0313] In some example embodiments, the first apparatus is or is comprised in a terminaldevice, and wherein the second apparatus is or is comprised in a network device.

[0314] In some example embodiments, a second apparatus capable of performing any of the method 1000B (for example, the network device 110-1 in FIG. 1) may comprise means for performing the respective operations of the method 1000B. 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 network device 110-1 in FIG. 1.

[0315] In some example embodiments, the second apparatus comprises means for transmitting, to a first apparatus, at least one measurement configuration and at least one set of conditions; means for receiving, from the first apparatus, indication information indicative of a first set of conditions among the at least one set of conditions being satisfied; and means for transmitting, to the first apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[0316] In some example embodiments, the second apparatus further comprises: means for performing uplink or downlink communication between the first apparatus and the second apparatus on a respective one of the at least one SBFD time resource based on the first link direction configuration.

[0317] In some example embodiments, the second apparatus further comprises: means for based on reception of the indication information indicative of a first set of conditions being satisfied, determining that the first link direction configuration is to be activated for the first apparatus.

[0318] In some example embodiments, the second apparatus further comprises: means for determining that the first link direction configuration is to be deactivated based on at least one of the following: receiving, from at least one third apparatus providing the at least one neighbor cell, a fourth indication of deactivating the first link direction configuration, transmitting, to the at least one third apparatus, a fifth indication of deactivating the first link direction configuration, expiry of a timer, the timer being started upon activation of the first link direction configuration, or activation of a second link direction configuration; and means for transmitting, to the first apparatus, a second indication of deactivating the first link direction configuration.

[0319] In some example embodiments, the first link direction configuration is transmitted to the first apparatus via radio resource control, RRC, signaling.

[0320] In some example embodiments, the second apparatus further comprises: means for transmitting, to the first apparatus, a plurality of link direction configurations comprising at least the first link direction configuration; and wherein the first indication comprises an index of the first link direction configuration among the plurality of link direction configurations.

[0321] In some example embodiments, the second apparatus further comprises: means for receiving, from the first apparatus, preference information indicating at least one of the following: a preferred link direction on the at least one SBFD time resource, or an indication of a preferred link direction pattern on the at least one SBFD time resource.

[0322] In some example embodiments, the link direction pattern indicated by the first link direction configuration comprises at least one of the following: a link direction on a frame configuration comprising at least one SBFD time resource, a link direction on a SBFD slot, or a link direction on a SBFD symbol.

[0323] In some example embodiments, the second apparatus further comprises: means for determining the first link direction configuration to be activated in the serving cell based on information received from at least one third apparatus providing the at least one neighbor cell.

[0324] In some example embodiments, the second apparatus further comprises: means for transmitting, to the at least one third apparatus, at least one link direction configuration to be applied in the serving cell, the at least one link direction configuration comprising at least the first link direction configuration; and means for receiving acknowledgement of the at least one link direction configuration from the at least one third apparatus.

[0325] In some example embodiments, the second apparatus further comprises: means for transmitting, to the at least one third apparatus, an activation time period associated with the first link direction configuration to be activated in the serving cell.

[0326] In some example embodiments, the second apparatus further comprises: means for transmitting, to the at least one third apparatus, the at least one set of conditions to be applied for activation or deactivation of the first link direction configuration.

[0327] In some example embodiments, a first apparatus capable of performing any of the method 1100A (for example, the terminal device 120 in FIG. 1) may comprise means for performing the respective operations of the method 11A00. 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 terminal device 120 in FIG. 1.

[0328] In some example embodiments, the first apparatus comprises means for receiving, from a second apparatus, at least one measurement configuration and at least one set of conditions; means for performing at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell based on the at least one measurement configuration; and means for in accordance with a determination that a first set of conditions among the at least one set of conditions is satisfied based on a result of the at least one measurement, activating e a first link direction configuration of the at least one link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

[0329] In some example embodiments, the first apparatus further comprises: means for transmitting, to the second apparatus, a first indication that the first link configuration of the at least one of link direction configuration is activated.

[0330] In some example embodiments, the first apparatus further comprises: means for receiving, from the second apparatus, at least one link direction configuration comprising at least the first link direction configuration.

[0331] In some example embodiments, the first apparatus further comprises: in accordance with a determination that the first set of conditions associated with activation of the first link direction configuration is satisfied, activate the first link direction configuration.

[0332] In some example embodiments, the first apparatus further comprises: in accordance with a determination that the second set of conditions is satisfied based on a result of at least one further measurement, deactivate the first link direction configuration; and transmit, to the second apparatus, a second indication that the first link direction configuration is deactivated.

[0333] In some example embodiments, the first apparatus further comprises: means fordeactivating the first link direction configuration in response to at least one of receiving, from the second apparatus, a third indication of activating a second link direction configuration, the second link direction configuration indicating at least one further link direction pattern on at least one SBFD time resource, receiving, from the second apparatus, a third indication of deactivating the first link direction configuration, or expiry of a timer, the timer being started upon activation of the first link direction configuration.

[0334] In some example embodiments, the first apparatus further comprises: means for performing uplink or downlink communication between the first apparatus and the second apparatus on a respective one of the at least one SBFD time resource based on the activated first link direction configuration.

[0335] In some example embodiments, the at least one measurement configuration comprises at least one of a first measurement configuration for measuring a channel quality of the serving cell, or a second measurement configuration for measuring a cross link interference, CLI, in at least one of the serving cell or the at least one neighbor cell, and wherein each set of conditions among the at least one set of conditions comprises at least one of the following: at least one first condition associated with at least one first measurement on the channel quality of the serving cell, or at least one second condition associated with at least one second measurement on the CLI.

[0336] In some example embodiments, the at least one measurement comprises at least one of the following: at least one first measurement on the channel quality of the serving cell which is measured based on the first measurement configuration, or at least one second measurement on the CLI which is measured based on the second measurement configuration.

[0337] In some example embodiments, the first apparatus further comprises: means for determining that the first set of conditions is satisfied based on at least one of the following: a determination, based on the at least one first measurement, that the channel quality of the serving cell is below a first quality threshold; or a determination, based on the at least one second measurement, that a power of the CLI is above a second power threshold.

[0338] In some example embodiments, the first link direction configuration is received from the second apparatus via radio resource control, RRC, signaling

[0339] In some example embodiments, the link direction pattern indicated by the first link direction configuration comprises at least one of the following: a link direction on a frame configuration comprising at least one SBFD time resource, a link direction on a SBFD slot, or a link direction on a SBFD symbol.

[0340] In some example embodiments, the first apparatus is or is comprised in a terminal device, and wherein the second apparatus is or is comprised in a network device.

[0341] In some example embodiments, a second apparatus capable of performing any of the method 1100B (for example, the network device 110-1 in FIG. 1) may comprise means for performing the respective operations of the method 1100B. 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 network device 110-1 in FIG. 1.

[0342] In some example embodiments, the second apparatus comprises means for transmitting, to a first apparatus, at least one link direction configuration, the at least one link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource; means for transmitting, to the first apparatus, at least one measurement configuration and at least one set of conditions; and means for receiving, from the first apparatus, a first indication that the first link configuration of the at least one of link direction configuration is activated.

[0343] In some example embodiments, the second apparatus further comprises: means for performing uplink or downlink communication between the first apparatus and the second apparatus on a respective one of the at least one SBFD time resource based on the first link direction configuration.

[0344] In some example embodiments, the second apparatus further comprises: means for receiving, from the first apparatus, a second indication that the first link direction configuration is deactivated.

[0345] In some example embodiments, the second apparatus further comprises: means for determining that the first link direction configuration is to be deactivated based on at least one of the following: receiving, from at least one third apparatus providing the at least one neighbor cell, a fourth indication of deactivating the first link direction configuration, transmitting, to the at least one third apparatus, a fifth indication ofdeactivating the first link direction configuration, means for expiry of a timer, the timer being started upon activation of the first link direction configuration, or means for transmitting, to the first apparatus, a third indication of deactivating the first link direction configuration.

[0346] In some example embodiments, the first apparatus is further caused to: means for transmitting, to the first apparatus, at least one link direction configuration comprising at least the first link direction configuration.

[0347] In some example embodiments, the first link direction configuration is transmitted to the first apparatus via radio resource control, RRC, signaling.

[0348] In some example embodiments, the link direction pattern indicated by the first link direction configuration comprises at least one of the following: a link direction on a frame configuration comprising at least one SBFD time resource, a link direction on a SBFD slot, or a link direction on a SBFD symbol.

[0349] In some example embodiments, the second apparatus further comprises: means for transmitting, to at least one third apparatus providing the at least one neighbor cell, at least one link direction configuration to be applied in the serving cell, the at least one link direction configuration comprising at least the first link direction configuration; and means for receiving acknowledgement of the at least one link direction configuration from the at least one third apparatus.

[0350] In some example embodiments, the second apparatus further comprises: means for transmitting, to the at least one third apparatus, an activation time period associated with the at least one link direction configuration to be applied in the serving cell.

[0351] In some example embodiments, the second apparatus further comprises: means for transmitting, to the at least one third apparatus, the at least one set of conditions to be applied for activation or deactivation of the first link direction configuration.

[0352] FIG. 12 is a simplified block diagram of a device 1200 that is suitable for implementing example embodiments of the present disclosure. The device 1200 may be provided to implement a communication device, for example, the terminal device 120 or the network device 110 as shown in FIG. 1. As shown, the device 1200 includes one or more processors 1210, one or more memories 1220 coupled to the processor 1210, and one or more communication modules 1240 coupled to the processor 1210.

[0353] The communication module 1240 is for bidirectional communications. The communication module 1240 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 1240 may include at least one antenna.

[0354] The processor 1210 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 1200 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.

[0355] The memory 1220 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) 1224, 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 randomaccess memory (RAM) 1222 and other volatile memories that will not last in the powerdown duration.

[0356] A computer program 1230 includes computer executable instructions that are executed by the associated processor 1210. The instructions of the program 1230 may include instructions for performing operations / acts of some example embodiments of the present disclosure. The program 1230 may be stored in the memory, e.g., the ROM 1224. The processor 1210 may perform any suitable actions and processing by loading the program 1230 into the RAM 1222.

[0357] The example embodiments of the present disclosure may be implemented by means of the program 1230 so that the device 1200 may perform any process of the disclosure as discussed with reference to FIG. 2 to FIG. 11B. The example embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.

[0358] In some example embodiments, the program 1230 may be tangibly contained ina computer readable medium which may be included in the device 1200 (such as in the memory 1220) or other storage devices that are accessible by the device 1200. The device 1200 may load the program 1230 from the computer readable medium to the RAM 1222 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).

[0359] FIG. 13 shows an example of the computer readable medium 1300 which may be in form of CD, DVD or other optical storage disk. The computer readable medium 1300 has the program 1230 stored thereon.

[0360] 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.

[0361] 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 belocated in both local and remote storage media.

[0362] 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.

[0363] 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.

[0364] 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 randomaccess memory (RAM), a read-only memory (ROM), an erasable programmable readonly memory (EPROM or Flash memory), an optical fiber, a portable compact disc readonly memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0365] 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 contextof 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.

[0366] 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

WHAT IS CLAIMED IS:

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 at least to:receive, from a second apparatus, at least one measurement configuration; perform at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell based on the at least one measurement configuration;transmit, to the second apparatus, at least one measurement report associated with a result of the at least one measurement; andreceive, from the second apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

2. The first apparatus of claim 1, wherein the first apparatus is further caused to: perform uplink or downlink communication on a respective one of the at least one SBFD time resource based on the activated first link direction configuration.

3. The first apparatus of claim 1 or 2, wherein the first apparatus is further caused to: deactivate the first link direction configuration in response to at least one of:receiving, from the second apparatus, a second indication of deactivating the first link direction configuration, orreceiving, from the second apparatus, a third indication of activating a second link direction configuration, the second link direction configuration indicating at least one further link direction pattern on at least one SBFD time resource, orexpiry of a timer, the timer being started upon activation of the first link direction configuration.

4. The first apparatus of any of claims 1 to 3, wherein the first link direction configuration is received from the second apparatus via radio resource control, RRC, signaling.

5. The first apparatus of any of claims 1 to 4, wherein the first apparatus is further caused to:receive, from the second apparatus, a plurality of link direction configurations comprising at least the first link direction configuration; andwherein the first indication comprises an index of the first link direction configuration among the plurality of link direction configurations.

6. The first apparatus of any of claims 1 to 5, wherein the at least one measurement configuration comprises at least one ofa first measurement configuration for measuring a channel quality of the serving cell, ora second measurement configuration for measuring a cross link interference, CLI, in at least one of the serving cell or the at least one neighbor cell.

7. The first apparatus of claim 6, wherein the at least one measurement comprises at least one of the following:at least one first measurement on the channel quality of the serving cell which is measured based on the first measurement configuration, orat least one second measurement on the CLI which is measured based on the second measurement configuration.

8. The first apparatus of any of claims 1 to 7, wherein the first apparatus is further caused to:transmit, to the second apparatus, preference information indicating at least one of the following:a preferred link direction on the at least one SBFD time resource, or an indication of a preferred link direction pattern on the at least one SBFD time resource.

9. The first apparatus of any of claims 1 to 7, wherein the link direction pattern indicated by the first link direction configuration comprises at least one of the following:a link direction on a frame configuration comprising at least one SBFD time resource, a link direction on a SBFD slot, or68a link direction on a SBFD symbol.

10. The first apparatus of any of claims 1 to 9, wherein the first apparatus is or is comprised in a terminal device, and wherein the second apparatus is or is comprised in a network device.

11. 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 at least to:transmit, to a first apparatus, at least one measurement configuration; receive, from the first apparatus, at least one measurement report associated with a result of at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell; andin accordance with a determination that a first set of conditions among at least one set of conditions is satisfied based on the result of the at least one measurement, transmit, to the first apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

12. The second apparatus of claim 11, wherein the second apparatus is further caused to:perform uplink or downlink communication between the first apparatus and the second apparatus on a respective one of the at least one SBFD time resource based on the first link direction configuration.

13. The second apparatus of claim 11 or 12, wherein the at least one measurement configuration comprises at least one of:a first measurement configuration for measuring a channel quality of the serving cell, ora second measurement configuration for measuring a cross link interference, CLI, in at least one of the serving cell or the at least one neighbor cell, andwherein the at least one set of conditions comprises at least one of the following:at least one first condition associated with at least one first measurement on the channel quality of the serving cell, orat least one second condition associated with at least one second measurement on the CLI.

14. The second apparatus of claim 13, wherein the second apparatus is caused to: in accordance with a determination, based on the at least one first measurement, that the channel quality of the serving cell is below a quality threshold, determining that the at least one first condition is satisfied; andin accordance with a determination, based on the at least one second measurement, that a power of the CLI is above a power threshold, determining that the at least one second condition is satisfied.

15. The second apparatus of any of claims 11 to 14, wherein the second apparatus is further caused to:determine that the first link direction configuration is to be deactivated based on at least one of the following:receiving, from at least one third apparatus providing the at least one neighbor cell, a fourth indication of deactivating the first link direction configuration,transmitting, to the at least one third apparatus, a fifth indication of deactivating the first link direction configuration,expiry of a timer, the timer being started upon activation of the first link direction configuration, oractivation of a second link direction configuration; andtransmit, to the first apparatus, a second indication of deactivating the first link direction configuration.

16. The second apparatus of any of claims 11 to 15, wherein the first link direction configuration is transmitted to the first apparatus via radio resource control, RRC, signaling.

17. The second apparatus of any of claims 11 to 16, wherein the second apparatus is further caused to:transmit, to the first apparatus, a plurality of link direction configurations comprising70at least the first link direction configuration; andwherein the first indication comprises an index of the first link direction configuration among the plurality of link direction configurations.

18. The second apparatus of any of claims 11 to 17, wherein the second apparatus is further caused to:receive, from the first apparatus, preference information indicating at least one of the following:a preferred link direction on the at least one SBFD time resource, oran indication of a preferred link direction pattern on the at least one SBFD time resource.

19. The second apparatus of any of claims 11 to 17, wherein the link direction pattern indicated by the first link direction configuration comprises at least one of the following: a link direction on a frame configuration comprising at least one SBFD time resource, a link direction on a SBFD slot, ora link direction on a SBFD symbol.

20. The second apparatus of any of claims 11 to 19, wherein the second apparatus provides the serving cell of the first apparatus, and the second apparatus is further caused to:determine the first link direction configuration to be activated in the serving cell based on information received from at least one third apparatus providing the at least one neighbor cell.

21. The second apparatus of claim 20, wherein the second apparatus is further caused to:transmit, to the at least one third apparatus, at least one link direction configuration to be applied in the serving cell, the at least one link direction configuration comprising at least the first link direction configuration; andreceive acknowledgement of the at least one link direction configuration from the at least one third apparatus.

22. The second apparatus of claim 20 or 21, wherein the second apparatus is further71caused to:transmit, to the at least one third apparatus, an activation time period associated with the first link direction configuration to be activated in the serving cell.

23. The second apparatus of any of claims 20 to 22, wherein the second apparatus is further caused to:transmit, to the at least one third apparatus, the at least one set of conditions to be applied for activation or deactivation of the first link direction configuration.

24. A method comprising:receiving, from a second apparatus, at least one measurement configuration; performing at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell based on the at least one measurement configuration;transmitting, to the second apparatus, at least one measurement report associated with a result of the at least one measurement; andreceiving, from the second apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

25. A method comprising:transmitting, to a first apparatus, at least one measurement configuration; receiving, from the first apparatus, at least one measurement report associated with a result of at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell; andin accordance with a determination that a first set of conditions among at least one set of conditions is satisfied based on the result of the at least one measurement, transmitting to the first apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

26. A first apparatus comprising:means for receiving, from a second apparatus, at least one measurement72configuration;means for performing at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell based on the at least one measurement configuration;means for transmitting, to the second apparatus, at least one measurement report associated with a result of the at least one measurement; andmeans for receiving, from the second apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

27. A second apparatus comprising:means for transmitting, to a first apparatus, at least one measurement configuration;means for receiving, from the first apparatus, at least one measurement report associated with a result of at least one measurement with respect to at least one of a serving cell of the first apparatus or at least one neighbor cell; andmeans for in accordance with a determination that a first set of conditions among at least one set of conditions is satisfied based on the result of the at least one measurement, transmitting to the first apparatus, a first indication of activating a first link direction configuration, the first link direction configuration indicating a link direction pattern on at least one sub-band full duplex, SBFD, time resource.

28. A computer readable medium comprising instructions stored thereon for causing an apparatus at least to perform the method of claim 24 or the method of claim 25.

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