Subband full-duplex configuration
The SBFD configuration with UE-specific guardbands addresses UL coverage and latency issues in TDD systems by enabling efficient resource allocation and interference mitigation, enhancing communication performance in unpaired wideband NR cells.
Patent Information
- Application Number
- PCT/CN2024/086194
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-04-04
- Publication Date
- 2025-10-09
AI Technical Summary
Existing communication networks face challenges in improving UL coverage and latency in TDD systems due to limited time duration allocation for uplink, leading to reduced capacity and increased interference in unpaired wideband NR cells.
Implementing a subband full-duplex (SBFD) configuration with UE-specific guardbands larger than cell-specific guardbands, allowing simultaneous DL and UL transmission on different physical resource blocks, and enabling UEs to report their filtering/RF capabilities for inter-subband and in-band emission interference mitigation.
Enhances UL coverage and reduces interference by optimizing resource utilization through UE-specific configurations, improving communication efficiency and capacity in unpaired wideband NR cells.
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Figure CN2024086194_09102025_PF_FP_ABST
Abstract
Description
SUBBAND FULL-DUPLEX CONFIGURATIONFIELD
[0001] Various example embodiments relate to the field of telecommunication and in particular, to a terminal device, a network device, methods, apparatuses and a computer readable medium for subband full-duplex (SBFD) configurations.BACKGROUND
[0002] A communication network can be seen 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.
[0003] Such communication networks operate in accordance with standards, such as those promulgated by 3GPP (Third Generation Partnership Project) or ETSI (European Telecommunications Standards Institute) . Examples of such standards include the so-called 5G (5th Generation) standard or other standards promulgated by 3GPP.SUMMARY
[0004] In general, example embodiments of the present disclosure provide a solution for SBFD configurations.
[0005] In a first aspect, there is provided a terminal device. The terminal device comprises at least one processor and at least one memory storing instructions. When executed by the at least one processor, the instructions cause the terminal device at least to: receive, from a network device, a first configuration specific to the terminal device; and determine a first frequency structure for sub-band full duplex (SBFD) at least based on the first configuration, wherein at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively.
[0006] In a second aspect, there is provided a terminal device. The terminal device comprises at least one processor and at least one memory storing instructions. When executed by the at least one processor, the instructions cause the terminal device at least to: receive, from a network device, an indication of requirements for guardband of a cell of the network device; and transmit, to the network device, information of a capability related to the terminal device supporting a guardband in the case that the capability of the terminal device satisfies the requirements for guardband.
[0007] In a third aspect, there is provided a network device. The network device comprises at least one processor and at least one memory storing instructions. When executed by the at least one processor, the instructions cause the network device at least to: determine a first configuration specific to a terminal device, wherein the first configuration is associated with a first frequency structure for sub-band full duplex (SBFD) , and at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively; and transmit the first configuration to the terminal device.
[0008] In a fourth aspect, there is provided a network device. The network device comprises at least one processor and at least one memory storing instructions. When executed by the at least one processor, the instructions cause the network device at least to: transmit, to a terminal device, an indication of requirements for guardband of a cell of the network device; and receive, from the terminal device, information of a capability related to the terminal device supporting a guardband, wherein the capability of the terminal device satisfies the requirements for guardband.
[0009] In a fifth aspect, there is provided a method performed by a terminal device. The method comprises: receiving, from a network device, a first configuration specific to the terminal device; and determining a first frequency structure for sub-band full duplex (SBFD) at least based on the first configuration, wherein at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively.
[0010] In a sixth aspect, there is provided a method performed by a terminal device. The method comprises: receiving, from a network device, an indication of requirements for guardband of a cell of the network device; and transmitting, to the network device, information of a capability related to the terminal device supporting a guardband in the case that the capability of the terminal device satisfies the requirements for guardband.
[0011] In a seventh aspect, there is provided a method performed by a network device. The method comprises: determining a first configuration specific to a terminal device, wherein the first configuration is associated with a first frequency structure for sub-band full duplex (SBFD) , and at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively; and transmitting the first configuration to the terminal device.
[0012] In an eighth aspect, there is provided a method performed by a network device. The method comprises: transmitting, to a terminal device, an indication of requirements for guardband of a cell of the network device; and receiving, from the terminal device, information of a capability related to the terminal device supporting a guardband, wherein the capability of the terminal device satisfies the requirements for guardband.
[0013] In a ninth aspect, there is provided an apparatus. The apparatus comprises means for receiving, from a network device, a first configuration specific to the terminal device; and means for determining a first frequency structure for sub-band full duplex (SBFD) at least based on the first configuration, wherein at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively.
[0014] In a tenth aspect, there is provided an apparatus. The apparatus comprises means for receiving, from a network device, an indication of requirements for guardband of a cell of the network device; and means for transmitting, to the network device, information of a capability related to the terminal device supporting a guardband in the case that the capability of the terminal device satisfies the requirements for guardband.
[0015] In an eleventh aspect, there is provided an apparatus. The apparatus comprises means for determining a first configuration specific to a terminal device, wherein the first configuration is associated with a first frequency structure for sub-band full duplex (SBFD) , and at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively; and means for transmitting the first configuration to the terminal device.
[0016] In a twelfth aspect, there is provided an apparatus. The apparatus comprises means for transmitting, to a terminal device, an indication of requirements for guardband of a cell of the network device; and means for receiving, from the terminal device, information of a capability related to the terminal device supporting a guardband, wherein the capability of the terminal device satisfies the requirements for guardband.
[0017] In a thirteenth aspect, there is provided a non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the method according to any one of the above fifth to eighth aspects.
[0018] In an fourteenth aspect, there is provided a computer program product comprising program instructions for performing at least the method according to any one of the above fifth to eighth aspects.
[0019] In a fifteenth aspect, there is provided a computer program comprising instructions, which, when executed by an apparatus, cause the apparatus at least to perform at least the method according to any one of the above fifth to eighth aspects.
[0020] In a sixteenth aspect, there is provided a terminal device. The terminal device comprises: receiving circuitry configured to receive, from a network device, a first configuration specific to the terminal device; and determining circuitry configured to determine a first frequency structure for sub-band full duplex (SBFD) at least based on the first configuration, wherein at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively.
[0021] In a seventeenth aspect, there is provided a terminal device. The terminal device comprises: receiving circuitry configured to receive, from a network device, an indication of requirements for guardband of a cell of the network device; and transmitting circuitry configured to transmit, to the network device, information of a capability related to the terminal device supporting a guardband in the case that the capability of the terminal device satisfies the requirements for guardband.
[0022] In an eighteenth aspect, there is provided a network device. The network device comprises: determining circuitry configured to determine a first configuration specific to a terminal device, wherein the first configuration is associated with a first frequency structure for sub-band full duplex (SBFD) , and at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively; and transmitting circuitry configured to transmit the first configuration to the terminal device.
[0023] In a nineteenth aspect, there is provided a network device. The network device comprises: transmitting circuitry configured to transmit, to a terminal device, an indication of requirements for guardband of a cell of the network device; and receiving circuitry configured to receive, from the terminal device, information of a capability related to the terminal device supporting a guardband, wherein the capability of the terminal device satisfies the requirements for guardband.
[0024] 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
[0025] Some example embodiments will now be described with reference to the accompanying drawings, in which:
[0026] Fig. 1A illustrates an example communication system in which embodiments of the present disclosure may be implemented;
[0027] Fig. 1B illustrates a schematic diagram illustrating frequency-time resource partitioning with SBFD as compared to FDD and TDD;
[0028] Fig. 1C illustrates a schematic diagram illustrating SBFD slots and non-SBFD slots;
[0029] Fig. 2 illustrates an example signaling chart of an example process according to some embodiments of the present disclosure;
[0030] Fig. 3 illustrates a schematic diagram illustrating a signaling flow on subband capability and reporting according to some embodiments of the present disclosure;
[0031] Fig. 4 illustrates an example signaling chart of another example process according to some embodiments of the present disclosure;
[0032] Fig. 5A illustrates a schematic diagram illustrating an example of frequency-domain subband determination for DUD configuration according to some embodiments of the present disclosure;
[0033] Fig. 5B illustrates a schematic diagram illustrating another example of frequency-domain subband determination for DU configuration according to some embodiments of the present disclosure;
[0034] Fig. 6 illustrates a schematic diagram illustrating a signaling flow on UE-specific frequency configuration of subbands according to some embodiments of the present disclosure;
[0035] Fig. 7 illustrates a schematic diagram illustrating a method implemented at a terminal device according to some other embodiments of the present disclosure;
[0036] Fig. 8 illustrates a schematic diagram illustrating a method implemented at a network device according to some other embodiments of the present disclosure;
[0037] Fig. 9 illustrates a schematic diagram illustrating another method implemented at a terminal device according to some other embodiments of the present disclosure;
[0038] Fig. 10 illustrates a schematic diagram illustrating another method implemented at a network device according to some other embodiments of the present disclosure;
[0039] Fig. 11 illustrates a simplified block diagram of an apparatus that is suitable for implementing embodiments of the present disclosure; and
[0040] Fig. 12 illustrates a block diagram of an example computer readable medium in accordance with some embodiments of the present disclosure.
[0041] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0042] Principles of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. The disclosure described herein can be implemented in various manners other than the ones described below.
[0043] 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.
[0044] 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.
[0045] It shall be understood that although the terms “first” and “second” etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.
[0046] 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. As used herein, “at least one of the following: <a list of two or more elements>” and “at least one of <a list of two or more elements>” and similar wording, where the list of two or more elements are joined by “and” or “or” , mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements.
[0047] As used in this application, the term “circuitry” may refer to one or more or all of the following:
[0048] (a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) and
[0049] (b) combinations of hardware circuits and software, such as (as applicable) :
[0050] (i) a combination of analog and / or digital hardware circuit (s) with software / firmware and
[0051] (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
[0052] (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.
[0053] 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.
[0054] As used herein, the term “communication network” refers to a network following any suitable communication standards, such as 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) , the future 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.
[0055] 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) , a NR NB (also referred to as a gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a relay, a low power node such as a femto, a pico, and so forth, depending on the applied terminology and technology.
[0056] 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. In the following description, the terms “terminal device” , “communication device” , “terminal” , “user equipment” and “UE” may be used interchangeably.
[0057] Some embodiments may relate to duplexing evolution, including subband non-overlapping full duplex (SBFD) . 3GPP 5G NR currently supports two duplexing modes: FDD for paired bands and TDD for unpaired bands. In TDD, the time domain resource is 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.
[0058] Motivated by this, 3GPP conducted a Rel-18 study item on the evolution of duplexing operation in NR that addresses the challenges above. One of the objectives of the study item is to allow simultaneous DL and UL transmission on different physical resource blocks (PRBs) / subbands within an unpaired wideband NR cell. This may be referred to as subband non-overlapping full duplex (SBFD) . In the context of the present disclosure, the duplexing scheme of SBFD may also be referred to as a cross-division duplexing (xDD) scheme or a flexible duplexing (FDU) scheme.
[0059] The main purpose of the SBFD scheme is to improve UL coverage and latency. The coverage improvement comes from cell-edge UEs to be able to transmit much more frequent over time as compared to traditional TDD where typically around 1 out of 5 slots are used for UL transmission. Currently, the default assumption in 3GPP is that the base station (e.g., gNB) will support full-duplex operation, i.e. can transmit (in DL) and receive (in UL) simultaneously in separate resource blocks (RBs) of the NR carrier, while the UE remains half-duplex, i.e. can either transmit or receive at a certain time. Some relevant objectives of the Rel-19 work item on duplex evolution are as following:
[0060] The topic of semi-static indication of the frequency location of the SBFD subbands is under discussion and the following has been agreed:
[0061] Cell-specific or cell-common configurations may be supported for time-domain locations of the SBFD subbands. In addition, cell-specific or cell-common configurations may be supported for frequency-domain locations of the SBFD subbands. In the following description, the terms “cell-common configuration” and “cell-specific configuration” may be used interchangeably to refer to a configuration specific to the cell and not specific to the UE. A cell-specific configuration is generally available and common to all the UEs in that cell.
[0062] Some example embodiments of the present disclosure relate to the signaling of UE-specific frequency subband configuration. Especially, a method with low signaling overhead is proposed to allow certain UEs to operate with a guardband that is larger than (or different from) the nominal cell-specific guardband. The network device may transmit a UE-specific configuration specific to the UE. The UE may determine a frequency structure for SBFD at least based on the received UE-specific configuration. A guardband in the determined frequency structure for SBFD is larger than the corresponding cell-specific guardband. In the following description, the term “UE-specific configuration” may refer to a configuration signalled to a specific UE, thus allowing to indicate different information to different UEs.
[0063] In addition, studies on additional support of UE-specific configuration on time and / or frequency locations are also needed. Among others, one of the motivations is the UE-dependent RF implementation, where different UEs may have different filtering capabilities thus leaking more or less energy to adjacent resource blocks or subbands. Those UEs with high adjacent-RB leakage ratio (or poor filtering capabilities) should require larger separation between the UL and DL subbands (i.e., a larger guardband) in order to avoid inter-subband cross-link interference.
[0064] Some example embodiments of the present disclosure provide a solution on how the UE provides, to the gNB, knowledge on its filtering / RF capabilities in terms of inter-subband or in-band emission interference mitigation. Especially, a UE receives an indication of guardband requirements of the gNB. If a capability of the UE satisfies the guardband requirements of the gNB, the UE transmits information of the capability of the UE to the gNB. In this way, a scheme for inter-subband or in-band emission interference mitigation may be designed.
[0065] Principles and embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Reference is first made to Fig. 1A, which illustrates an example communication system 100 in which embodiments of the present disclosure may be implemented. The system 100 includes a terminal device 110 and a network device 120. The terminal device 110 is capable of connecting and communicating in an UL or DL with the network device 120 as long as the terminal device 110 is located within the corresponding cells of the network device 120. In communication systems, an UL refers to a link in a direction from a terminal device 110 to a network device 120, and a DL refers to a link in a direction from the network device 120 to the terminal device 110. The network device 120 may transmit scheduling information scheduling an uplink transmission to the terminal device 110, and the terminal device 110 may transmit a uplink transmission or a plurality of repetitions of the uplink transmission to the network device 120.
[0066] Communications in the communication system 100 may be implemented according to any proper communication protocol (s) , comprising, but not limited to, cellular communication protocols of the first generation (1G) , the second generation (2G) , the third generation (3G) , the fourth generation (4G) , the fifth generation (5G) and the sixth generation (6G) and on the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and / or any other protocols currently known or to be developed in the future. Moreover, the communication may utilize any proper wireless communication technology, comprising but not limited to: Code Division Multiple Access (CDMA) , Frequency Division Multiple Access (FDMA) , Time Division Multiple Access (TDMA) , Frequency Division Duplex (FDD) , Time Division Duplex (TDD) , Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Division Multiple (OFDM) , Discrete Fourier Transform spread OFDM (DFT-s-OFDM) and / or any other technologies currently known or to be developed in the future.
[0067] It is to be understood that the numbers of devices (i.e., the terminal device 110 and the network device 120) and their connection relationships and types shown in Fig. 1A are only for the purpose of illustration without suggesting any limitation. For example, the communication system 100 may include any suitable numbers of devices adapted for implementing embodiments of the present disclosure. For example, while Fig. 1A depicts the terminal device 110 as a mobile phone, the terminal device 110 may be any type of user equipment.
[0068] Based on what has been discussed above, some contents will be further described below with reference to the accompanying drawings. Fig. 1B illustrates a schematic diagram illustrating frequency-time resource partitioning with SBFD as compared to FDD and TDD. Fig. 1C illustrates a schematic diagram illustrating SBFD slots and non-SBFD slots. During the SBFD slots, the non-overlapping DL subbands and UL subband (s) both exist. During the non-SBFD slots, the entire band is used for DL or UL (i.e., legacy / full DL / UL slots) . It is to be noted that SBFD slots and non-SBFD slots are illustrated with reference to Fig. 1C, however, the present disclosure is also applied for SBFD mini-slots and non-SBFD mini-slots, or SBFD symbols and non-SBFD symbols, or other time units not listed here. As shown in Fig. 1C, there may be a guardband between the DL subband and the UL subband in the SBFD slots. The UL subband may be placed in the middle of the carrier (also known as DUD configuration) , with two corresponding guardbands (of the same or different sizes) separating the UL subband with the two DL subbands. It should be understood that although the SBFD slots are illustrated to have a DUD frequency resource partitioning, it is not intended to be limiting of example embodiments. In some examples, from configuration point of view, the UL subband may be placed in one side of the carrier (DU or UD configuration) in which a single guardband is needed between the UL and DL subband.
[0069] Fig. 2 illustrates an example signaling chart illustrating an example process 200 according to some embodiments of the present disclosure. For the purpose of discussion, the example 200 will be described with reference to Fig. 1A, and the process 200 may involve the terminal device 110 and the network device 120 as shown in Fig. 1A. It would be appreciated that although the process 200 has been described in the communication system 100 of Fig. 1A, this process may be likewise applied to other communication scenarios.
[0070] As shown in Fig. 2, the network device 120 transmits (202) , to the terminal device 110, an indication 204 of requirements for guardband of a cell of the network device 120. The terminal device 110 receives (206) the indication 204 of requirements for guardband of the cell of the network device 120 from the network device 120. The terminal device 110 determines (208) whether the capability of the terminal device 110 satisfies the requirements for guardband. If a capability of the terminal device 110 satisfies the requirements for guardband, the terminal device 110 transmits (210) information 212 of the capability related to the terminal device 110 supporting a guardband to the network device 120. The network device 120 receives (214) the information 212 of the capability related to the terminal device 110 supporting a guardband from the terminal device 110.
[0071] In some embodiments, the capability may be associated with a size of a bandwidth part. Alternatively or additionally, the capability may be associated with a waveform. Alternatively or additionally, the capability may be associated with a carrier. In other words, the UE capability on guardband may be defined per carrier / BWP / utilized waveform.
[0072] In some embodiments, the terminal device 110 may cease accessing the cell of the network device 120 if the capability of the terminal device 110 does not satisfy the requirements for guardband. In other words, the terminal device 110 may perform baring based on its capability
[0073] In some embodiments, the requirements for guardband may include a guardband size threshold required by the network device 120. If the guardband size supported by the terminal device 110 is no greater than the guardband size threshold, the terminal device 110 may determine (218) that the capability of the terminal device 110 satisfies the requirements for guardband. The information 212 of the capability may include the guardband size supported by the terminal device 110. If the guardband size supported by the terminal device 110 is greater than the guardband size threshold, the terminal device 110 may determine that the capability of the terminal device 110 does not satisfy the requirements for guardband and may be barred to access the cell.
[0074] In some embodiments, the network device 120 may determine a SBFD configuration specific to the terminal device 110 at least based on the information 212 of the capability. The network device 120 may transmit the SBFD configuration specific to the terminal device 110 to the terminal device 110.
[0075] In a more specific example, the terminal device 110 supports a minimum guardband size of M RBs and a guardband size less than M RBs would result in severe inter-subband cross-link interference. The network device 120 requires a maximum guardband size of N RBs. If M ≤ N, the terminal device 110 may access the cell. The terminal device 110 may report its capability on guardband (e.g., the minimum guardband size of M RBs) to the network device 120. The capability on guardband may be associated with at least one of a specific carrier, a specific BWP or the utilized waveform (e.g., OFDM waveform) . The network device 120 may then transmit a UE-specific SBFD configuration to the terminal device 110. If M > N, the terminal device 110 may be barred to access the cell.
[0076] Fig. 3 illustrates a schematic diagram illustrating a signaling flow 300 on subband capability and reporting according to some embodiments of the present disclosure. The flow 300A may be a more specific example of the process 200 of Fig. 2. The terminal device 110 may be called as UE and the network device 120 may be called as gNB for short. The UE 110 may be a SBDF aware UE.
[0077] As shown in Fig. 3, at 302, the SBFD aware UE 110 may receive information from one cell of the gNB 120 on barring for cell access. The information may contain the requested guardband for SBFD per the candidate BWP size, waveform and / or carrier. At 304, the UE may determine whether its supported guardband can satisfy the requested guardband of the cell.
[0078] The SBFD aware UE 110 may access into the cell only when its supported guardband can satisfy the requested guardband of the cell. The serving cell may request or expect the capability of the UE accessing the cell to support a guardband equal or smaller than a guardband threshold. The serving cell may bar a UE not supportive of a guardband equal or smaller than a guardband threshold by SIB. The serving cell may hand the UE over to another cell that has less requirement on guardband capability (e.g., a cell having a guardband threshold larger than the guardband supported by the UE) . By barring UE access on a cell based on the SBFD capability of the UE, the utilization efficiency of resources for UL transmission may be improved.
[0079] Generally, the UE may support a small guardband for a carrier / BWP with a small size (e.g. in FR1) and a large guardband for a carrier with a large size (e.g. in FR2) . There should be more complexity / difficulty for filtering with large carrier and not all UE has the same capability on the processing of guardband with same size. Thus, a UE-specific configuration adaptive to the UE capability may be needed so as to improve the utilization efficiency of resources for UL transmission.
[0080] If the guardband supported by the UE 110 can satisfy the requested guardband of the cell, at 306, the SBFD aware UE 110 may access into the cell and report to gNB 120 UE- specific capability on guardband for SBFD for at least one of BWP size, waveform or carrier. At 308, the gNB 120 receives the guardband capability of the UE 110 and determines a proper configuration of guardband for the UE 110 based on the guardband capability of the UE 110, and / or gNB measurements, UE-to-UE interference, etc. At 310, the gNB 120 transmits information of UE-specific SBFD configuration to the UE 110. The location and size of the guardband in the SBFD may be directly indicated or derived from the information of UE-specific SBFD configuration. At 312, the UE 110 may perform SBFD-based transmission / reception (Tx / Rx) according to the UE-specific SBFD configuration.
[0081] In this way, a scheme for the UE providing knowledge on the UE’s filtering / RF capabilities in terms of inter-subband or in-band emission interference mitigation to the gNB is designed. The UE may perform barring of cell access based on the gNB requested guardband and the UE capability per carrier / BWP and utilized waveform. The UE may provide, to the gNB, knowledge on its filtering / RF capabilities in terms of inter-subband or in-band emission interference mitigation per carrier / BWP / utilized waveform. The UE may receive a network configuration on UE-specific guardband. The network configuration on UE-specific guardband may be associated with the reported UE capability per carrier / BWP and utilized waveform. The UE may then perform SBFD-based communication based on the network configuration.
[0082] Fig. 4 illustrates an example signaling chart illustrating another example process 400 according to some embodiments of the present disclosure. For the purpose of discussion, the example 400 will be described with reference to Fig. 1A, and the process 400 may involve the terminal device 110 and the network device 120 as shown in Fig. 1A. It would be appreciated that although the process 400 has been described in the communication system 100 of Fig. 1A, this process may be likewise applied to other communication scenarios. The process 400 may be performed in combination with the process 200 or independent of the process 200.
[0083] As shown in Fig. 4, the network device 120 determines (402) a first configuration 406 specific to the terminal device 110. The network device 120 transmits (404) the first configuration 406 specific to the terminal device 110 to the terminal device 110. In other words, the first configuration 406 may be a UE-specific configuration. The terminal device 110 receives (408) the first configuration 406 from the network device 120 and determines (410) a first frequency structure for SBFD at least based on the first configuration 406. At least one guardband in the first frequency structure for SBFD is larger than at least one cell- specific guardband, respectively.
[0084] In some embodiments, the terminal device 110 may further receive a second configuration from the network device 120. The second configuration may be a cell-specific configuration. The terminal device 110 may determine a second frequency structure for SBFD based on the second configuration. The second frequency structure for SBFD may include the at least one cell-specific guardband. The first frequency structure for SBFD may be determined based on the second frequency structure for SBFD and the first configuration 406. In other words, the UE-specific frequency structure for SBFD may be determined based on the cell-specific structure frequency structure for SBFD and the UE-specific configuration. In some implementations, the terminal device 110 may receive the cell-specific configuration before or simultaneously with receiving the UE-specific configuration. The terminal device 110 may determine the UE-specific frequency structure for SBFD based on both the cell-specific configuration and the UE-specific configuration. In some embodiments, the terminal device 110 may communicate with the network device 120 based on the first frequency structure for SBFD.
[0085] In some embodiments, when determining the first frequency structure for SBFD, the terminal device 110 may determine an uplink subband in the first frequency structure for SBFD by substracting at least one portion of a cell-specific uplink subband in the second frequency structure for SBFD from the cell-specific uplink subband based on the first configuration 406. In some embodiments, the terminal device 110 may determine the at least one guardband in the first frequency structure for SBFD by extending the at least one cell-specific guardband to the at least one portion. If a RB belongs to a cell-specific uplink subband in the second frequency structure for SBFD but does not belong to the uplink subband in the first frequency structure for SBFD, the resource block RB belongs to the at least one guardband.
[0086] In some embodiments, when determining the first frequency structure for SBFD, the terminal device 110 may determine at least one downlink subband in the first frequency structure for SBFD by substracting at least one portion of at least one cell-specific downlink subband in the second frequency structure from the at least one cell-specific downlink subband, respectively, based on the first configuration 406. In some embodiments, the terminal device 110 may determine the at least one guardband in the first frequency structure for SBFD by extending the at least one cell-specific guardband to the at least one portion. If a RB belongs to a cell-specific downlink subband in the second frequency structure for SBFD but does not belong to the downlink subband in the first frequency structure for SBFD, the resource block RB belongs to the at least one guardband.
[0087] In a specific example, the terminal device 110 may derive a UE-specific SBFD subband configuration by substracting one or two additional guardbands from the cell-specific UL subband. An UE-specific guardband may be an extension of the cell-specific UL guardband towards the corresponding substracted portion of the cell-specific UL subband. In other words, an UE-specific guardband may cover both the cell-specific UL guardband and the corresponding substracted portion of the cell-specific UL subband. In another specific example, the terminal device 110 may derive a UE-specific SBFD subband configuration by substracting one additional guardband from a cell-specific DL subband. An UE-specific guardband may be an extension of the cell-specific DL guardband towards the corresponding substracted portion of the cell-specific DL subband. In other words, an UE-specific guardband may cover both the cell-specific DL guardband and the corresponding substracted portion of the cell-specific DL subband.
[0088] In some embodiments, the first configuration 406 may include a value for one size difference. Each of the at least one portion has a size equal to the value for the size difference. In other words, a portion whose size is equal to the size difference value may be substracted from the cell-specific UL subband or the cell-specific DL subband. The UE-specific guardband may be cover both the cell-specific guardband and the corresponding substracted portion of the cell-specific subband. In an example, for a DUD configuration, two portions with the same size may be substracted from both sides of the cell-specific UL subband. In another example, two portions with the same size may be substracted from the two cell-specific DL subbands.
[0089] In some embodiments, the first configuration 406 may include a value for a first size difference and a value for a second size difference. A first one of the at least one portion has a size equal to the value for the first size difference. A second one of the at least one portion has a size equal to the value for the second size difference. In other words, two portions with corresponding sizes may be substracted from two sides of the cell-specific UL subband or the two cell-specific DL subbands. Each UE-specific guardband may be cover both the corresponding cell-specific guardband and the corresponding substracted portion of the cell-specific subband.
[0090] Fig. 5A illustrates a schematic diagram illustrating an example of frequency-domain subband determination for DUD configuration according to some embodiments of the present disclosure. As shown in Fig. 5A, a cell-specific SBFD configuration (left in Fig. 5A) and a UE-specific SBFD configuration determined (right in Fig. 5A) are shown. The cell-specific SBFD configuration is a DUD configuration including two DL subbands, an UL subband and two guardbands between the DL subbands and the UL subband. The sizes (in number of RBs) of the first cell-specific DL subband, the first cell-specific guardband, the cell-specific UL subband, the second cell-specific guardband and the second cell-specific DL subband are and respectively. It should be understood that the terms “first” and “second” here are only used to distinguish the subbands without suggesting any limitations.
[0091] The UE-specific SBFD configuration may be determined based on the cell-specific SBFD configuration and the UE-specific configuration information. The UE-specific configuration information may include a ‘delta’ ΔGB1 between the first cell-specific guardband and the first UE-specific guardband and a ‘delta’ ΔGB2 between the second cell-specific guardband and the second UE-specific guardband. The locations and sizes of the UE-specific DL subbands are the same with the corresponding cell-specific DL subbands, i.e., and Two portions of the cell-specific UL subband with sizes of ΔGB1 and ΔGB2 are substracted, i.e., The two guardbands are extended accordingly, i.e., and The size differences ΔGB1 and ΔGB2 may the same or different. Thus, the network device may signal ΔGB1 and ΔGB2 (or and ) , which the terminal device uses to determine the UE-specific configuration of DL subband (s) , guardband (s) and UL subband. In some other implementations, the UE-specific configuration information may include only one ‘delta’ ΔGB between the cell-specific guardband and a corresponding UE-specific guardband. Thus, the sizes of the two UE-specific guardbands and the UE-specific UL subband for the DUD configuration may be determined as follows: and
[0092] Referring back to Fig. 4, in some embodiments, the first configuration 406 may include a value for one guardband size. Each of the at least one portion has a size equal to a difference between the value for the guardband size and a size of each of the at least one cell-specific guardband. In other words, each substracted portion of the corresponding cell-specific guardbands may have a size equal to the UE-specific guardband size and the corresponding cell-specific guardband. In the example of FIG. 5A, a value of a guardband size is indicated in the UE-specific configuration information. The sizes of the two UE-specific guardbands and the UE-specific UL subband may be determined as follows: and
[0093] In some embodiments, the first configuration 406 may include a value for a first guardband size and a value for a second guardband size. A first one of the at least one portion has a size equal to a difference between the value for the first guardband size and a size of a first one of the at least one cell-specific guardband. A second one of the at least one portion has a size equal to a difference between the value for the second guardband size and a size of a second one of the at least one cell-specific guardband. In other words, two guardband size for the DUD configuration may be indicated in the UE-specific configuration information. The corresponding cell-specific cell-specific UL or DL subbands may be substracted accordingly.
[0094] In some embodiments, when determining the first frequency structure for SBFD, the terminal device 110 may determine an uplink subband in the first frequency structure for SBFD based on the first configuration 406. In some embodiments, the terminal device 110 may determine the at least one guardband in the first frequency structure for SBFD based on the second frequency structure for SBFD and the uplink subband in the first frequency structure for SBFD. If a RB belongs to a cell-specific uplink subband in the second frequency structure for SBFD but does not belong to the uplink subband in the first frequency structure for SBFD, the resource block RB belongs to the at least one guardband.
[0095] In some embodiments, the first configuration 406 may include a value for a size of the uplink subband in the first frequency structure for SBFD. In other words, the UE-specific UL subband size may be indicated in the UE-specific configuration information. The corresponding cell-specific cell-specific UL subbands may be substracted accordingly.
[0096] Fig. 5B illustrates a schematic diagram illustrating another example of frequency-domain subband determination for DU configuration according to some embodiments of the present disclosure. The UE-specific SBFD configuration may be determined based on the cell-specific SBFD configuration and the UE-specific configuration information. The network device may signal a UE-specific configuration of the UL subband which the terminal device uses to determine the UE-specific configuration of guardband (s) and DL subband (s) . The UE-specific configuration information may include a value of a UE-specific UL subband size The locations and sizes of the UE-specific DL subband are the same with the cell-specific DL subband, i.e., A portions of the cell-specific UL subband is substracted, i.e., The guardband is extended accordingly, i.e.,
[0097] Referring back to Fig. 4, in some embodiments, the first configuration 406 may include a start RB and a size of the uplink subband in the first frequency structure for SBFD. Alternatively, the first configuration 406 may include a resource indicator value (RIV) which includes a start RB and a size of the uplink subband in the first frequency structure for SBFD. In this way, the location and size of the UE-specific UL subband may be determined based on the first configuration 406. RBs belonging to the cell-specific UL subband but not belonging to the UE-specific UL subband may be included in the UE-specific guardband (s) .
[0098] In some embodiments, the first configuration 406 may include a value for a size difference between the cell-specific uplink subband and the uplink subband in the first frequency structure for SBFD. In other words, a sum size of the portion (s) to be substracted from the cell-specific uplink subband may be indicated in the UE-specific configuration information.
[0099] In some embodiments, the first configuration 406 may include a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband, the at least one guardband may include one guardband, and the at least one cell-specific guardband may include one cell-specific guardband. When determining the uplink subband in the first frequency structure for SBFD, a portion with a size equal to a size difference between the cell-specific uplink subband and the uplink subband may be substracted from the cell-specific uplink subband. The at least one guardband in the first frequency structure for SBFD may be determined by extending the cell-specific guardband to the portion of the cell-specific uplink subband.
[0100] In some embodiments, the at least one guardband may include a first guardband and a second guardband, and the at least one cell-specific guardband may include a first cell-specific guardband and a second cell-specific guardband. When determining the uplink subband in the first frequency structure for SBFD, a first portion may be substracted from a first side of the cell-specific uplink subband, and a second portion may be substracted from a second side of the cell-specific uplink subband. The at least one guardband in the first frequency structure for SBFD may be determined by extending the first cell-specific guardband to the first portion of the cell-specific uplink subband and extending the second cell-specific guardband to the second portion of the cell-specific uplink subband.
[0101] In some embodiments, the first configuration 406 may include a value for a size of the uplink subband in the first frequency structure for SBFD or a value for a size difference between the cell-specific uplink subband and the uplink subband in the first frequency structure for SBFD. For example, a value of a UL subband size or the ‘delta’ between the cell-specific UL subband and UE-specific UL subband size may be indicated in the UE-specific configuration information.
[0102] In some embodiments, if a value for a size difference between the cell-specific uplink subband and the uplink subband in the first frequency structure for SBFD is an even value, a size of the first portion and a size of the second portion may be equal to half of the value for the size difference. For example, for the DUD configuration, RBs are substracted on each side of the cell-specific UL subband, wherein is an even value.
[0103] In some embodiments, if a value for a size difference between the cell-specific uplink subband and the uplink subband in the first frequency structure for SBFD is an odd value, a sum of a size of the first portion and a size of the second portion may be equal to the value for the size difference, and the size of the first portion may be different from the size of the second portion by one. For example, for the DUD configuration, floor RBs are substracted on one side of the cell-specific UL subband and floor RBs are substracted on the other side of the cell-specific UL subband, wherein is an odd value.
[0104] In some embodiments, when determining the first frequency structure for SBFD, the terminal device 110 may determine at least one downlink subband in the first frequency structure for SBFD based on the first configuration 406. The terminal device 110 may determine the at least one guardband in the first frequency structure for SBFD based on the second frequency structure for SBFD and the at least one downlink subband. A resource block (RB) belongs to the at least one guardband in the case that the RB belongs to at least one cell-specific downlink subband in the second frequency structure for SBFD but does not belong to the at least one downlink subband in the first frequency structure for SBFD.
[0105] In some embodiments, the first configuration 406 may include a value for a size of each of the at least one downlink subband in the first frequency structure for SBFD. In some embodiments, the first configuration 406 may include a start RB and a size of each of the at least one downlink subband in the first frequency structure for SBFD. In some embodiments, the first configuration 406 may include at least one RIV. Each RIV includes a start RB and a size of one of the downlink subband.
[0106] In some embodiments, the first configuration 406 may include a value for one size difference. A difference between a size of each of the at least one cell-specific downlink subband and a size of each of the at least one downlink subband in the first frequency structure for SBFD equals to the size difference.
[0107] In some embodiments, the first configuration 406 may include a value for a first size difference and a value for a second size difference. A difference between a size of a first one of the at least one cell-specific downlink subband and a size of a second one of the at least one downlink subband in the first frequency structure for SBFD equals to the first size difference. A difference between a size of a second one of the at least one cell-specific downlink subband and a size of a second one of the at least one downlink subband in the first frequency structure for SBFD equals to the second size difference.
[0108] In some embodiments, prior to receiving the first configuration 406, the terminal device 110 may transmit, to the network device 120, information of a capability related to the terminal device 110 supporting a guardband. The capability may be associated with a size of a bandwidth part. Alternatively or additionally, the capability may be associated with a waveform. Alternatively or additionally, the capability may be associated with a carrier.
[0109] In some embodiments, the network device 120 may receive the information of the capability related to the terminal device 110 supporting a guardband and determine the first configuration 406 based on the information of the capability. In some implemetations, the information of the capability may include a guardband size supported by the terminal device 110. A size of each of the at least one guardband in the first frequency structure for SBFD is no less than the guardband size supported by the terminal device 110.
[0110] In some embodiments, the terminal device 110 may receive, from the network device 120, an indication of requirements for guardband of the network device 120. The terminal device 110 may transmit the information of the capability if the capability of the terminal device 110 satisfies the requirements for guardband. In some embodiments, the terminal device 110 may cease accessing a cell of the network device 120 in the case that the capability of the terminal device 110 does not satisfy the requirements for guardband.
[0111] In some implementations, the information of the capability may include a guardband size supported by the terminal device 110. The requirements for guardband may include a guardband size threshold required by the network device 120. The terminal device 110 may determine that the capability of the terminal device 110 satisfies the requirements for guardband if the guardband size supported by the terminal device 110 is no larger than the guardband size threshold.
[0112] Fig. 6 illustrates a schematic diagram illustrating a signaling flow 600 on subband capability and reporting according to some embodiments of the present disclosure. The flow 600 may be a more specific example of the process 400 of Fig. 4. The terminal device 110 may be called as UE and the network device 120 may be called as the gNB for short. The UE 110 may be a SBDF aware UE.
[0113] As shown in Fig. 6, at 602, the UE 110 receives a cell-specific configuration of the frequency locations of one or more of UL subbands, DL subbands, guardbands. and may represent the number of RBs in each subband. It should be noted that, in case of DUD configuration, there could be different guardband sizes and and / or different DL subband sizes and
[0114] In some implementations, the frequency locations of UL subband and DL subband (s) are explicitly configured. Guardband (s) if any are implicitly derived as the RBs which are not within UL subband or DL subband (s) . Alternatively, the frequency location of UL subband and the number of RBs for guardband (s) , if any, are explicitly configured. DL subband (s) are implicitly derived as RBs which are not within UL subband or guardband (s) .
[0115] At 604, the UE 110 receives dedicated information containing a UE-specific value. At 606, the UE 110 derives the UE-specific SBFD subband configuration based on the dedicated information containing the UE-specific value.
[0116] In a first alternative implementation, the UE-specific value in the dedicated information at 604 may include a value of a guardband size (in number of RBs) (applicable to DU, UD or DUD configuration) , or two separate values of guardband sizes and (applicable to DUD configuration) . The signaled guardband size (s) are expected to be larger or equal than the corresponding cell-specific guardband size (s) i.e., Alternatively, the UE-specific value in the dedicated information at 604 may include a ‘delta’ between the cell-specific guardband and UE-specific guardband ΔGB (or ΔGB1, ΔGB2 in case of DUD configuration with different guardband sizes) .
[0117] The UE 110 derives UE-specific SBFD subband configuration by substracting the additional guardband from the initially-configured UL subband. In other words, the UE-specific SBFD guardband is an extension of the cell-specific guardband towards the UL subband. This helps keeping the DL subband (s) being aligned across all UEs to simplify other operations like resource-block group (RBG) determination, cell-common CSI-RS transmissions, etc.
[0118] In a specific example, the UE-specific value in the dedicated information at 604 may include a ‘delta’ between the cell-specific guardband and UE-specific guardband ΔGB .
[0119] Thus, the determination may be as follows:
[0120] For DU or UD configuration, N=1; while for DUD configuration, N=2.
[0121] For DUD configuration, if different guardband sizes are indicated, the UE-specific value in the dedicated information at 604 may include two ‘delta’ between the cell-specific guardbands and UE-specific guardbands ΔGB1, ΔGB2 . The determination may be as follows:
[0122] In some examples, the UE is indicated with a value of a guardband size (in number of RBs) or an integer indicating the difference or ‘delta’ between the cell-specific guardband and UE-specific guardband. With such implementations, very low signaling (as low as a single integer indicating the delta between UE-specific and cell-common guardband) is required.
[0123] In a second alternative implementation, the UE-specific value in the dedicated information at 604 may include a value of a UL subband size The value of the UL subband size is sufficient for DU or UD configuration under the assumption that the UL subband always starts or ends in the in the first or last RB of the cell resource grid. Alternatively, the UE-specific value in the dedicated information at 604 may include a tuple (start RB and subband size or number of RBs ) of the UL subband. The start RB and RB length of the UL subband may be used for all of DU, UD, or DUD configurations. A resource indicator value (RIV) may be used for this purpose as it provides a way to indicate start RB and RB length with a single integer, i.e. ) . It should be noted that that there could be a restriction that the indicated UE-specific RBs shall be a subset of the cell-common RBs. In other words, the UE 110 does not expect that the UE-specific UL subband configuration indicates RBs not belonging to the cell-common UL subband configuration. The implementation of the value of a UL subband size may be considered a specific case of the implementation of the tuple or the RIV where is implicitly determined to be 0 or the last RB in the carrier. Alternatively, the UE-specific value in the dedicated information at 604 may include the ‘delta’ between the cell-specific UL subband and UE-specific UL subband size
[0124] The UE 110 may derive the UE-specific SBFD subband configuration based on the UE-specific value in the dedicated information at 604. If the UE-specific value includes a tuple of the UL subband, the UE 110 may derive the UE-specific SBFD subband configuration based on and The UE 110 assumes that a RB that belongs to the UL subband according the cell-common configuration, but does not belong to the UL subband according to the UE-specific configuration, is a guardband RB while the DL subband (s) remain the same) . The determination may be as follows:
[0125] For the case where is provided, the UE 110 may determine based on the For the case where or is provided, in case of DU or UD configuration, the UL subband is derived as while
[0126] For the case where or is provided, in case of DUD configuration, the UE 110 may derive the UE-specific subband by subtracting RBs on each side of the cell-common UL subband for even values of ΔUL. For the case where or is provided, in case of DUD configuration, if the ΔUL is an odd value, the UE 110 may derive the UE-specific subband by substracting floor RBs on one side of the UL subband and substracting floor RBs on the other side of the UL subband. In an example, floor RBs are substracted on the side of the UL subband with lower RB index and floor RBs are substracted on the side of the UL subband with higher RB index. In another example, floor RBs are substracted on the side of the UL subband with lower RB index and floor RBs are substracted on the side of the UL subband with higher RB index. Correspondingly, the two guardbands on each side of the UL subband increase by floor and floor respectively.
[0127] In some examples, the UE is indicated with a UE-specific configuration of the UL subband, where the UE-specific UL subband is a subset of the RBs of the cell-specific UL subband. The ‘delta’ RBs between the corresponding subbands of the UE-specific configuration and cell-specific configuration are assumed to be additional guardband RBs for the UE.
[0128] At 608, the UE 110 operates according to the received UE-specific subband configuration. For example, the UE 110 may only receive signals in the (UE-specific) DL subbands and may only transmit signals in the (UE-specific) UL subbands. The UE-specific subband configuration may be further used for the purposes of ‘rate-matching’ . For example, the UE 110 may exclude resource blocks (RB) not belonging to the DL subbands from a DL reception (e.g. a PDSCH containing data or a DL reference signal, CSI-RS) . Same applies for UL direction, where the UE 110 excludes any RB not belonging to the UL-subband from the UL transmission.
[0129] For the UE Tx / Rx behaviour at 608, the guardbands / UL / DL subbands are UE-specific and may be different for different UEs. The UE-specific guardbands / UL / DL subbands may be signaled differently compared to the cell-common ones.
[0130] This Tx / Rx behavior Tx / Rx behaviour at 608 needs to be replicated at the side of gNB 120 as well. In other words, the gNB 120 needs to determine in parallel the UE-specific subband configuration and transmit / receive to / from that particular UE 110 accordingly.
[0131] In both alternatives, the RBs in the DL subband (s) remain the same as in the cell-specific configuration. Having the DL subband aligned across all UEs helps to simplify other operations such as resource-block group (RBG) determination, cell-common CSI-RS transmissions, SSB, CORESET configurations, etc. With such implementations, the UE behavior may be more flexible and intuitive. Other configurations, processes and signallings are also possible. In one example, the UE-specific guardband may be an extension of the cell-specific guardband towards the DL subband. The UL subband remains the same while the DL subband is reduced. In another example, the UE 110 receives UE-specific information of DL subband configuration. The ‘delta’ RBs between the UE-specific and cell-specific configuration are assumed to be additional guardband RBs for the UE. The UL subband remains the same while the DL subband is reduced.
[0132] In some examples, the UE-specific frequency subband configuration may be provided taking, among others, UE-specific filtering / RF capabilities into account. In this way, a simple and low-overhead mechanism for UE-specific frequency configuration to deal with different UE RF capabilities is proposed.
[0133] Fig. 7 illustrates a schematic diagram illustrating a method 700 implemented at a terminal device according to some other embodiments of the present disclosure. For the purpose of discussion, the method 700 will be described from the perspective of the terminal device 110 as shown in Fig. 1A.
[0134] As shown in Fig. 7, at block 710, the terminal device 110 receives, from the network device, an indication of requirements for guardband of a cell of the network device. At block 720, the terminal device 110 determines whether the capability of the terminal device satisfies the requirements for guardband. If yes, the method 700 proceeds to block 730. At block 730, the terminal device 110 transmits, to the network device, information of a capability related to the terminal device supporting a guardband.
[0135] In some embodiments, the capability may be associated with at least one of the following: a size of a bandwidth part; a waveform; or a carrier.
[0136] In some embodiments, after transmitting the information of the capability, the terminal device 110 may receive, from the network device, a SBFD configuration specific to the terminal device.
[0137] In some embodiments, the terminal device 110 may cease accessing the cell of the network device in the case that the capability of the terminal device does not satisfy the requirements for guardband.
[0138] In some embodiments, the information of the capability may include a guardband size supported by the terminal device, and the requirements for guardband may include a guardband size threshold required by the network device. The terminal device 110 may determine that the capability of the terminal device satisfies the requirements for guardband in the case that the guardband size supported by the terminal device is no greater than the guardband size threshold.
[0139] With the method 700, the terminal device may provide to the network device knowledge on its capability related to SBFD, which improves the resource efficiency and performance of the communication.
[0140] Fig. 8 illustrates a schematic diagram illustrating a method 800 implemented at a network device according to some other embodiments of the present disclosure. For the purpose of discussion, the method 800 will be described from the perspective of the network device 120 as shown in Fig. 1A.
[0141] As shown in Fig. 8, at block 810, the network device 120 transmits, to the terminal device, an indication of requirements for guardband of a cell of the network device. At block 820, the network device 120 receives, from the terminal device 110, information of a capability related to the terminal device supporting a guardband. The capability of the terminal device satisfies the requirements for guardband.
[0142] In some embodiments, the capability may be associated with at least one of the following: a size of a bandwidth part; a waveform; or a carrier.
[0143] In some embodiments, the network device 120 may determine a SBFD configuration specific to the terminal device at least based on the information of the capability, and transmit, to the terminal device, the SBFD configuration specific to the terminal device.
[0144] In some embodiments, an access of the terminal device to the cell of the network device is ceased in the case that the capability of the terminal device does not satisfy the requirements for guardband.
[0145] In some embodiments, the information of the capability may include a guardband size supported by the terminal device, and the requirements for guardband may include a guardband size threshold required by the network device. The capability of the terminal device satisfies the requirements for guardband in the case that the guardband size supported by the terminal device is no greater than the guardband size threshold.
[0146] With the method 800, the network device may have knowledge on the capability of the terminal dvice related to SBFD, which improves the resource efficiency and performance of the communication.
[0147] Fig. 7 illustrates a schematic diagram illustrating a method 900 implemented at a terminal device according to some other embodiments of the present disclosure. For the purpose of discussion, the method 900 will be described from the perspective of the terminal device 110 as shown in Fig. 1A.
[0148] As shown in Fig. 9, at block 910, the terminal device 110 receives, from the network device, a first configuration specific to the terminal device. At block 920, the terminal device 110 determines a first frequency structure for sub-band full duplex, SBFD, at least based on the first configuration. At least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively.
[0149] In some embodiments, the terminal device 110 may receive, from the network device, a second configuration. The second configuration is a cell-specific configuration. The terminal device 110 may determine a second frequency structure for SBFD based on the second configuration. The second frequency structure for SBFD comprises the at least one cell-specific guardband. The first frequency structure for SBFD is determined based on the second frequency structure for SBFD and the first configuration.
[0150] In some embodiments, when determining the first frequency structure for SBFD, the terminal device 110 may determine an uplink subband in the first frequency structure for SBFD by substracting at least one portion of a cell-specific uplink subband in the second frequency structure for SBFD from the cell-specific uplink subband based on the first configuration.
[0151] In some embodiments, when determining the first frequency structure for SBFD, the terminal device 110 may determine at least one downlink subband in the first frequency structure for SBFD by substracting at least one portion of at least one cell-specific downlink subband in the second frequency structure from the at least one cell-specific downlink subband, respectively, based on the first configuration.
[0152] In some embodiments, when determining the first frequency structure for SBFD, the terminal device 110 may further determine the at least one guardband in the first frequency structure for SBFD by extending the at least one cell-specific guardband to the at least one portion.
[0153] In some embodiments, the first configuration may include a value for one size difference. Each of the at least one portion has a size equal to the value for the size difference.
[0154] In some embodiments, the first configuration may include a value for a first size difference and a value for a second size difference. A first one of the at least one portion has a size equal to the value for the first size difference, and a second one of the at least one portion has a size equal to the value for the second size difference;
[0155] In some embodiments, the first configuration may include a value for one guardband size. Each of the at least one portion has a size equal to a difference between the value for the guardband size and a size of each of the at least one cell-specific guardband.
[0156] In some embodiments, the first configuration may include a value for a first guardband size and a value for a second guardband size. A first one of the at least one portion has a size equal to a difference between the value for the first guardband size and a size of a first one of the at least one cell-specific guardband, and a second one of the at least one portion has a size equal to a difference between the value for the second guardband size and a size of a second one of the at least one cell-specific guardband.
[0157] In some embodiments, when determining the first frequency structure for SBFD, the terminal device 110 may determine an uplink subband in the first frequency structure for SBFD based on the first configuration.
[0158] In some embodiments, when determining the first frequency structure for SBFD, the terminal device 110 may further determine the at least one guardband in the first frequency structure for SBFD based on the second frequency structure for SBFD and the uplink subband.
[0159] In some embodiments, a RB belongs to the at least one guardband in the case that the RB belongs to a cell-specific uplink subband in the second frequency structure for SBFD but does not belong to the uplink subband in the first frequency structure for SBFD.
[0160] In some embodiments, the first configuration may include a value for a size of the uplink subband.
[0161] In some embodiments, the first configuration may include a start RB and a size of the uplink subband.
[0162] In some embodiments, the first configuration may include a resource indicator value, RIV, comprising a start RB and a size of the uplink subband.
[0163] In some embodiments, the first configuration may include a value for a size difference between the cell-specific uplink subband and the uplink subband in the first frequency structure for SBFD.
[0164] In some embodiments, the first configuration may include a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband. The at least one guardband may include one guardband, and the at least one cell-specific guardband may include one cell-specific guardband. When determining the uplink subband in the first frequency structure for SBFD, the terminal device 110 may substract a portion with a size equal to a size difference between the cell-specific uplink subband and the uplink subband from the cell-specific uplink subband.
[0165] In some embodiments, when determining the first frequency structure for SBFD, the terminal device 110 may further determine the at least one guardband in the first frequency structure for SBFD by extending the cell-specific guardband to the portion of the cell-specific uplink subband.
[0166] In some embodiments, the at least one guardband may include a first guardband and a second guardband, and the at least one cell-specific guardband may include a first cell-specific guardband and a second cell-specific guardband. When determining the uplink subband in the first frequency structure for SBFD, the terminal device 110 may substract a first portion from a first side of the cell-specific uplink subband, and substract a second portion from a second side of the cell-specific uplink subband.
[0167] In some embodiments, when determining the first frequency structure for SBFD, the terminal device 110 may further determine the at least one guardband in the first frequency structure for SBFD by: extending the first cell-specific guardband to the first portion of the cell-specific uplink subband; and extending the second cell-specific guardband to the second portion of the cell-specific uplink subband.
[0168] In some embodiments, the first configuration may include a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband. In the case that a value for a size difference between the cell-specific uplink subband and the uplink subband is an even value, a size of the first portion and a size of the second portion are equal to half of the value for the size difference.
[0169] In some embodiments, the first configuration may include a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband. In the case that a value for a size difference between the cell-specific uplink subband and the uplink subband is an odd value, a sum of a size of the first portion and a size of the second portion is equal to the value for the size difference, and the size of the first portion is different from the size of the second portion by one.
[0170] In some embodiments, when determining the first frequency structure for SBFD, the terminal device 110 may determine at least one downlink subband in the first frequency structure for SBFD based on the first configuration.
[0171] In some embodiments, when determining the first frequency structure for SBFD, the terminal device 110 may further determine the at least one guardband in the first frequency structure for SBFD based on the second frequency structure for SBFD and the at least one downlink subband.
[0172] In some embodiments, a RB belongs to the at least one guardband in the case that the RB belongs to at least one cell-specific downlink subband in the second frequency structure for SBFD but does not belong to the at least one downlink subband in the first frequency structure for SBFD.
[0173] In some embodiments, the first configuration may include a value for a size of each of the at least one downlink subband.
[0174] In some embodiments, the first configuration may include a start RB and a size of each of the at least one downlink subband.
[0175] In some embodiments, the first configuration may include at least one RIV, each comprising a start RB and a size of one of the downlink subband.
[0176] In some embodiments, the first configuration may include a value for one size difference, wherein a difference between a size of each of the at least one cell-specific downlink subband and a size of each of the at least one downlink subband in the first frequency structure for SBFD equals to the size difference.
[0177] In some embodiments, the first configuration may include a value for a first size difference and a value for a second size difference. A difference between a size of a first one of the at least one cell-specific downlink subband and a size of a second one of the at least one downlink subband in the first frequency structure for SBFD equals to the first size difference. A difference between a size of a second one of the at least one cell-specific downlink subband and a size of a second one of the at least one downlink subband in the first frequency structure for SBFD equals to the second size difference.
[0178] In some embodiments, the terminal device 110 may communicate with the network device based on the first frequency structure for SBFD.
[0179] In some embodiments, prior to receiving the first configuration, the terminal device 110 may transmit, to the network device, information of a capability related to the terminal device supporting a guardband.
[0180] In some embodiments, the capability may be associated with at least one of the following: a size of a bandwidth part; a waveform; or a carrier.
[0181] In some embodiments, the terminal device 110 may receive, from the network device, an indication of requirements for guardband of the network device. The information of the capability is transmitted in the case that the capability of the terminal device satisfies the requirements for guardband.
[0182] In some embodiments, the terminal device 110 may cease accessing a cell of the network device in the case that the capability of the terminal device does not satisfy the requirements for guardband.
[0183] In some embodiments, the information of the capability may include a guardband size supported by the terminal device, and the requirements for guardband may include a guardband size threshold required by the network device. The terminal device may determine that the capability of the terminal device satisfies the requirements for guardband in the case that the guardband size supported by the terminal device is no larger than the guardband size threshold.
[0184] In some embodiments, the information of the capability may include a guardband size supported by the terminal device, and a size of each of the at least one guardband in the first frequency structure for SBFD is no less than the guardband size supported by the terminal device.
[0185] With the method 900, a UE-specific frequency configuration related to SBFD may be signaled and a UE-specific guardband larger than the cell-specific guardband may be configured, which improves the performance of the communication.
[0186] Fig. 8 illustrates a schematic diagram illustrating a method 800 implemented at a network device according to some other embodiments of the present disclosure. For the purpose of discussion, the method 800 will be described from the perspective of the network device 120 as shown in Fig. 1A.
[0187] As shown in Fig. 10, at block1010, the network device 120 determines a first configuration specific to a terminal device. The first configuration is associated with a first frequency structure for SBFD and at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively. At block1020, the network device 120 transmits the first configuration to the terminal device.
[0188] In some embodiments, the network device 120 may determine a second configuration, wherein the second configuration is a cell-specific configuration and is associated with a second frequency structure for SBFD, and the second frequency structure for SBFD comprises the at least one cell-specific guardband; and transmit the second configuration to the terminal device. The first frequency structure for SBFD is determined based on the second frequency structure for SBFD and the first configuration.
[0189] In some embodiments, the first frequency structure for SBFD may include an uplink subband determined by substracting at least one portion of a cell-specific uplink subband in the second frequency structure for SBFD from the cell-specific uplink subband based on the first configuration.
[0190] In some embodiments, the first frequency structure for SBFD may include at least one downlink subband determined by substracting at least one portion of at least one cell-specific downlink subband in the second frequency structure from the at least one cell- specific downlink subband, respectively, based on the first configuration.
[0191] In some embodiments, the first frequency structure for SBFD may further include at least one guardband determined by extending the at least one cell-specific guardband to the at least one portion.
[0192] In some embodiments, the first configuration may include a value for one size difference. Each of the at least one portion has a size equal to the value for the size difference.
[0193] In some embodiments, the first configuration may include a value for a first size difference and a value for a second size difference. A first one of the at least one portion has a size equal to the value for the first size difference, and a second one of the at least one portion has a size equal to the value for the second size difference;
[0194] In some embodiments, the first configuration may include a value for one guardband size. Each of the at least one portion has a size equal to a difference between the value for the guardband size and a size of each of the at least one cell-specific guardband.
[0195] In some embodiments, the first configuration may include a value for a first guardband size and a value for a second guardband size. A first one of the at least one portion has a size equal to a difference between the value for the first guardband size and a size of a first one of the at least one cell-specific guardband, and a second one of the at least one portion has a size equal to a difference between the value for the second guardband size and a size of a second one of the at least one cell-specific guardband.
[0196] In some embodiments, the first frequency structure for SBFD may include an uplink subband determined based on the first configuration.
[0197] In some embodiments, the first frequency structure for SBFD may further include at least one guardband determined based on the second frequency structure for SBFD and the uplink subband.
[0198] In some embodiments, a RB belongs to the at least one guardband in the case that the RB belongs to a cell-specific uplink subband in the second frequency structure for SBFD but does not belong to the uplink subband in the first frequency structure for SBFD.
[0199] In some embodiments, the first configuration may include a value for a size of the uplink subband.
[0200] In some embodiments, the first configuration may include a start RB and a size of the uplink subband.
[0201] In some embodiments, the first configuration may include a resource indicator value, RIV, comprising a start RB and a size of the uplink subband.
[0202] In some embodiments, the first configuration may include a value for a size difference between the cell-specific uplink subband and the uplink subband in the first frequency structure for SBFD.
[0203] In some embodiments, the first configuration may include a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband, the at least one guardband may include one guardband, and the at least one cell-specific guardband may include one cell-specific guardband. The uplink subband in the first frequency structure for SBFD is determined by substracting a portion with a size equal to a size difference between the cell-specific uplink subband and the uplink subband from the cell-specific uplink subband.
[0204] In some embodiments, the guardband in the first frequency structure for SBFD is determined by extending the cell-specific guardband to the portion of the cell-specific uplink subband.
[0205] In some embodiments, the at least one guardband may include a first guardband and a second guardband, and the at least one cell-specific guardband may include a first cell-specific guardband and a second cell-specific guardband. The uplink subband in the first frequency structure for SBFD is determined by substracting a first portion from a first side of the cell-specific uplink subband; and substracting a second portion from a second side of the cell-specific uplink subband.
[0206] In some embodiments, the at least one guardband in the first frequency structure for SBFD is determined by extending the first cell-specific guardband to the first portion of the cell-specific uplink subband; and extending the second cell-specific guardband to the second portion of the cell-specific uplink subband.
[0207] In some embodiments, the first configuration may include a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband. In the case that a value for a size difference between the cell-specific uplink subband and the uplink subband is an even value, a size of the first portion and a size of the second portion are equal to half of the value for the size difference.
[0208] In some embodiments, the first configuration may include a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband. In the case that a value for a size difference between the cell-specific uplink subband and the uplink subband is an odd value, a sum of a size of the first portion and a size of the second portion is equal to the value for the size difference, and the size of the first portion is larger than the size of the second portion by one.
[0209] In some embodiments, the first frequency structure for SBFD may include at least one downlink subband determined based on the first configuration.
[0210] In some embodiments, the first frequency structure for SBFD may further include at least one guardband determined based on the second frequency structure for SBFD and the at least one downlink subband.
[0211] In some embodiments, a RB belongs to the at least one guardband in the case that the RB belongs to at least one cell-specific downlink subband in the second frequency structure for SBFD but does not belong to the at least one downlink subband in the first frequency structure for SBFD.
[0212] In some embodiments, the first configuration may include a value for a size of each of the at least one downlink subband.
[0213] In some embodiments, the first configuration may include a start RB and a size of each of the at least one downlink subband.
[0214] In some embodiments, the first configuration may include at least one RIV, each comprising a start RB and a size of one of the downlink subband.
[0215] In some embodiments, the first configuration may include a value for one size difference, wherein a difference between a size of each of the at least one cell-specific downlink subband and a size of each of the at least one downlink subband in the first frequency structure for SBFD equals to the size difference.
[0216] In some embodiments, the first configuration may include a value for a first size difference and a value for a second size difference. A difference between a size of a first one of the at least one cell-specific downlink subband and a size of a second one of the at least one downlink subband in the first frequency structure for SBFD equals to the first size difference. A difference between a size of a second one of the at least one cell-specific downlink subband and a size of a second one of the at least one downlink subband in the first frequency structure for SBFD equals to the second size difference.
[0217] In some embodiments, the network device 120 may communicate with the terminal device based on the first frequency structure for SBFD.
[0218] In some embodiments, prior to transmitting the first configuration, the network device 120 may receive, from the terminal device, information of a capability related to the terminal device supporting a guardband.
[0219] In some embodiments, the capability may be associated with at least one of the following: a size of a bandwidth part; a waveform; or a carrier.
[0220] In some embodiments, the network device 120 may transmit, to the terminal device, an indication of requirements for guardband of the network device. The information of the capability is received in the case that the capability of the terminal device satisfies the requirements for guardband.
[0221] In some embodiments, an access of the terminal device to the cell of the network device is ceased in the case that the capability of the terminal device does not satisfy the requirements for guardband.
[0222] In some embodiments, the information of the capability may include a guardband size supported by the terminal device, and the requirements for guardband may include a guardband size threshold required by the network device. The capability of the terminal device satisfies the requirements for guardband in the case that the guardband size supported by the terminal device is no greater than the guardband size threshold.
[0223] In some embodiments, the information of the capability may include a guardband size supported by the terminal device, and a size of each of the at least one guardband in the first frequency structure for SBFD is no less than the guardband size supported by the terminal device.
[0224] With the method 1000, a UE-specific frequency configuration related to SBFD may be signaled and a UE-specific guardband larger than the cell-specific guardband may be configured, which improves the performance of the communication.
[0225] In some embodiments, an apparatus capable of performing any of the method 700 (for example, the terminal device 110) may comprise means for performing the respective steps of the method 700. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0226] In some embodiments, the apparatus comprises: means for receiving, from a network device, an indication of requirements for guardband of a cell of the network device; and means for transmitting, to the network device, information of a capability related to the terminal device supporting a guardband in the case that the capability of the terminal device satisfies the requirements for guardband.
[0227] In some embodiments, the capability may be associated with at least one of the following: a size of a bandwidth part; a waveform; or a carrier.
[0228] In some embodiments, the apparatus may further comprise: means for receiving, from the network device, a SBFD configuration specific to the terminal device after transmitting the information of the capability.
[0229] In some embodiments, the apparatus may further comprise: means for ceasing accessing the cell of the network device in the case that the capability of the terminal device does not satisfy the requirements for guardband.
[0230] In some embodiments, the information of the capability may include a guardband size supported by the terminal device, and the requirements for guardband may include a guardband size threshold required by the network device. The apparatus may further comprise: means for determining that the capability of the terminal device satisfies the requirements for guardband in the case that the guardband size supported by the terminal device is no greater than the guardband size threshold.
[0231] In some embodiments, the apparatus further comprises means for performing other steps in some embodiments of the method 700. In some embodiments, the means comprises at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the apparatus.
[0232] In some embodiments, an apparatus capable of performing any of the method 800 (for example, the network device 120) may comprise means for performing the respective steps of the method 800. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0233] In some embodiments, the apparatus comprises: means for transmitting, to a terminal device, an indication of requirements for guardband of a cell of the network device; and means for receiving, from the terminal device, information of a capability related to the terminal device supporting a guardband, wherein the capability of the terminal device satisfies the requirements for guardband.
[0234] In some embodiments, the capability may be associated with at least one of the following: a size of a bandwidth part; a waveform; or a carrier.
[0235] In some embodiments, the apparatus may further comprise: means for determining a SBFD configuration specific to the terminal device at least based on the information of the capability, and means for transmitting, to the terminal device, the SBFD configuration specific to the terminal device.
[0236] In some embodiments, an access of the terminal device to the cell of the network device is ceased in the case that the capability of the terminal device does not satisfy the requirements for guardband.
[0237] In some embodiments, the information of the capability may include a guardband size supported by the terminal device, and the requirements for guardband may include a guardband size threshold required by the network device. The capability of the terminal device satisfies the requirements for guardband in the case that the guardband size supported by the terminal device is no greater than the guardband size threshold.
[0238] In some embodiments, the apparatus further comprises means for performing other steps in some embodiments of the method 800. In some embodiments, the means comprises at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the apparatus.
[0239] In some embodiments, an apparatus capable of performing any of the method 900 (for example, the terminal device 110) may comprise means for performing the respective steps of the method 900. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0240] In some embodiments, the apparatus comprises: means for from a network device, a first configuration specific to the terminal device; and means for determining a first frequency structure for sub-band full duplex, SBFD, at least based on the first configuration, wherein at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively.
[0241] In some embodiments, the apparatus may further comprise: means for receiving, from the network device, a second configuration. The second configuration is a cell- specific configuration. The apparatus may further comprise: means for determining a second frequency structure for SBFD based on the second configuration. The second frequency structure for SBFD comprises the at least one cell-specific guardband. The first frequency structure for SBFD is determined based on the second frequency structure for SBFD and the first configuration.
[0242] In some embodiments, the means for determining the first frequency structure for SBFD comprises means for determining an uplink subband in the first frequency structure for SBFD by substracting at least one portion of a cell-specific uplink subband in the second frequency structure for SBFD from the cell-specific uplink subband based on the first configuration.
[0243] In some embodiments, the means for determining the first frequency structure for SBFD comprises means for determining at least one downlink subband in the first frequency structure for SBFD by substracting at least one portion of at least one cell-specific downlink subband in the second frequency structure from the at least one cell-specific downlink subband, respectively, based on the first configuration.
[0244] In some embodiments, the means for determining the first frequency structure for SBFD further comprises means for determining the at least one guardband in the first frequency structure for SBFD by extending the at least one cell-specific guardband to the at least one portion.
[0245] In some embodiments, the first configuration may include a value for one size difference. Each of the at least one portion has a size equal to the value for the size difference.
[0246] In some embodiments, the first configuration may include a value for a first size difference and a value for a second size difference. A first one of the at least one portion has a size equal to the value for the first size difference, and a second one of the at least one portion has a size equal to the value for the second size difference;
[0247] In some embodiments, the first configuration may include a value for one guardband size. Each of the at least one portion has a size equal to a difference between the value for the guardband size and a size of each of the at least one cell-specific guardband.
[0248] In some embodiments, the first configuration may include a value for a first guardband size and a value for a second guardband size. A first one of the at least one portion has a size equal to a difference between the value for the first guardband size and a size of a first one of the at least one cell-specific guardband, and a second one of the at least one portion has a size equal to a difference between the value for the second guardband size and a size of a second one of the at least one cell-specific guardband.
[0249] In some embodiments, the means for determining the first frequency structure for SBFD comprises means for determining an uplink subband in the first frequency structure for SBFD based on the first configuration.
[0250] In some embodiments, the means for determining the first frequency structure for SBFD further comprises means for determining the at least one guardband in the first frequency structure for SBFD based on the second frequency structure for SBFD and the uplink subband.
[0251] In some embodiments, a RB belongs to the at least one guardband in the case that the RB belongs to a cell-specific uplink subband in the second frequency structure for SBFD but does not belong to the uplink subband in the first frequency structure for SBFD.
[0252] In some embodiments, the first configuration may include a value for a size of the uplink subband.
[0253] In some embodiments, the first configuration may include a start RB and a size of the uplink subband.
[0254] In some embodiments, the first configuration may include a resource indicator value, RIV, comprising a start RB and a size of the uplink subband.
[0255] In some embodiments, the first configuration may include a value for a size difference between the cell-specific uplink subband and the uplink subband in the first frequency structure for SBFD.
[0256] In some embodiments, the first configuration may include a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband. The at least one guardband may include one guardband, and the at least one cell-specific guardband may include one cell-specific guardband. The means for determining the uplink subband in the first frequency structure for SBFD comprises means for substracting a portion with a size equal to a size difference between the cell-specific uplink subband and the uplink subband from the cell-specific uplink subband.
[0257] In some embodiments, the means for determining the first frequency structure for SBFD further comprises means for determining the at least one guardband in the first frequency structure for SBFD by extending the cell-specific guardband to the portion of the cell-specific uplink subband.
[0258] In some embodiments, the at least one guardband may include a first guardband and a second guardband, and the at least one cell-specific guardband may include a first cell-specific guardband and a second cell-specific guardband. The means for determining the uplink subband in the first frequency structure for SBFD comprises means for substracting a first portion from a first side of the cell-specific uplink subband, and means for substracting a second portion from a second side of the cell-specific uplink subband.
[0259] In some embodiments, the means for determining the first frequency structure for SBFD further comprises means for determining the at least one guardband in the first frequency structure for SBFD by: extending the first cell-specific guardband to the first portion of the cell-specific uplink subband; and extending the second cell-specific guardband to the second portion of the cell-specific uplink subband.
[0260] In some embodiments, the first configuration may include a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband. In the case that a value for a size difference between the cell-specific uplink subband and the uplink subband is an even value, a size of the first portion and a size of the second portion are equal to half of the value for the size difference.
[0261] In some embodiments, the first configuration may include a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband. In the case that a value for a size difference between the cell-specific uplink subband and the uplink subband is an odd value, a sum of a size of the first portion and a size of the second portion is equal to the value for the size difference, and the size of the first portion is different from the size of the second portion by one.
[0262] In some embodiments, the means for determining the first frequency structure for SBFD comprises means for determining at least one downlink subband in the first frequency structure for SBFD based on the first configuration.
[0263] In some embodiments, the means for determining the first frequency structure for SBFD further comprises means for determining the at least one guardband in the first frequency structure for SBFD based on the second frequency structure for SBFD and the at least one downlink subband.
[0264] In some embodiments, a RB belongs to the at least one guardband in the case that the RB belongs to at least one cell-specific downlink subband in the second frequency structure for SBFD but does not belong to the at least one downlink subband in the first frequency structure for SBFD.
[0265] In some embodiments, the first configuration may include a value for a size of each of the at least one downlink subband.
[0266] In some embodiments, the first configuration may include a start RB and a size of each of the at least one downlink subband.
[0267] In some embodiments, the first configuration may include at least one RIV, each comprising a start RB and a size of one of the downlink subband.
[0268] In some embodiments, the first configuration may include a value for one size difference, wherein a difference between a size of each of the at least one cell-specific downlink subband and a size of each of the at least one downlink subband in the first frequency structure for SBFD equals to the size difference.
[0269] In some embodiments, the first configuration may include a value for a first size difference and a value for a second size difference. A difference between a size of a first one of the at least one cell-specific downlink subband and a size of a second one of the at least one downlink subband in the first frequency structure for SBFD equals to the first size difference. A difference between a size of a second one of the at least one cell-specific downlink subband and a size of a second one of the at least one downlink subband in the first frequency structure for SBFD equals to the second size difference.
[0270] In some embodiments, the apparatus may further comprise: means for communicating with the network device based on the first frequency structure for SBFD.
[0271] In some embodiments, the apparatus may further comprise: means for transmitting, to the network device, information of a capability related to the terminal device supporting a guardband prior to receiving the first configuration.
[0272] In some embodiments, the capability may be associated with at least one of the following: a size of a bandwidth part; a waveform; or a carrier.
[0273] In some embodiments, the apparatus may further comprise: means for receiving, from the network device, an indication of requirements for guardband of the network device. The information of the capability is transmitted in the case that the capability of the terminal device satisfies the requirements for guardband.
[0274] In some embodiments, the apparatus may further comprise: means for ceasing accessing a cell of the network device in the case that the capability of the terminal device does not satisfy the requirements for guardband.
[0275] In some embodiments, the information of the capability may include a guardband size supported by the terminal device, and the requirements for guardband may include a guardband size threshold required by the network device. The apparatus may further comprise: means for determining that the capability of the terminal device satisfies the requirements for guardband in the case that the guardband size supported by the terminal device is no larger than the guardband size threshold.
[0276] In some embodiments, the information of the capability may include a guardband size supported by the terminal device, and a size of each of the at least one guardband in the first frequency structure for SBFD is no less than the guardband size supported by the terminal device.
[0277] In some embodiments, the apparatus further comprises means for performing other steps in some embodiments of the method 900. In some embodiments, the means comprises at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the apparatus.
[0278] In some embodiments, an apparatus capable of performing any of the method 1000 (for example, the network device 120) may comprise means for performing the respective steps of the method 1000. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0279] In some embodiments, the apparatus comprises: means for determining a first configuration specific to a terminal device, wherein the first configuration is associated with a first frequency structure for sub-band full duplex, SBFD, and at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively; and means for transmitting the first configuration to the terminal device.
[0280] In some embodiments, the apparatus may further comprise: means for determining a second configuration, wherein the second configuration is a cell-specific configuration and is associated with a second frequency structure for SBFD, and the second frequency structure for SBFD comprises the at least one cell-specific guardband; and means for transmitting the second configuration to the terminal device. The first frequency structure for SBFD is determined based on the second frequency structure for SBFD and the first configuration.
[0281] In some embodiments, the first frequency structure for SBFD may include an uplink subband determined by substracting at least one portion of a cell-specific uplink subband in the second frequency structure for SBFD from the cell-specific uplink subband based on the first configuration.
[0282] In some embodiments, the first frequency structure for SBFD may include at least one downlink subband determined by substracting at least one portion of at least one cell-specific downlink subband in the second frequency structure from the at least one cell-specific downlink subband, respectively, based on the first configuration.
[0283] In some embodiments, the first frequency structure for SBFD may further include at least one guardband determined by extending the at least one cell-specific guardband to the at least one portion.
[0284] In some embodiments, the first configuration may include a value for one size difference. Each of the at least one portion has a size equal to the value for the size difference.
[0285] In some embodiments, the first configuration may include a value for a first size difference and a value for a second size difference. A first one of the at least one portion has a size equal to the value for the first size difference, and a second one of the at least one portion has a size equal to the value for the second size difference;
[0286] In some embodiments, the first configuration may include a value for one guardband size. Each of the at least one portion has a size equal to a difference between the value for the guardband size and a size of each of the at least one cell-specific guardband; or
[0287] In some embodiments, the first configuration may include a value for a first guardband size and a value for a second guardband size. A first one of the at least one portion has a size equal to a difference between the value for the first guardband size and a size of a first one of the at least one cell-specific guardband, and a second one of the at least one portion has a size equal to a difference between the value for the second guardband size and a size of a second one of the at least one cell-specific guardband.
[0288] In some embodiments, the first frequency structure for SBFD may include an uplink subband determined based on the first configuration.
[0289] In some embodiments, the first frequency structure for SBFD may further include at least one guardband determined based on the second frequency structure for SBFD and the uplink subband.
[0290] In some embodiments, a RB belongs to the at least one guardband in the case that the RB belongs to a cell-specific uplink subband in the second frequency structure for SBFD but does not belong to the uplink subband in the first frequency structure for SBFD.
[0291] In some embodiments, the first configuration may include a value for a size of the uplink subband.
[0292] In some embodiments, the first configuration may include a start RB and a size of the uplink subband.
[0293] In some embodiments, the first configuration may include a resource indicator value, RIV, comprising a start RB and a size of the uplink subband.
[0294] In some embodiments, the first configuration may include a value for a size difference between the cell-specific uplink subband and the uplink subband in the first frequency structure for SBFD.
[0295] In some embodiments, the first configuration may include a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband, the at least one guardband may include one guardband, and the at least one cell-specific guardband may include one cell-specific guardband. The uplink subband in the first frequency structure for SBFD is determined by substracting a portion with a size equal to a size difference between the cell-specific uplink subband and the uplink subband from the cell-specific uplink subband.
[0296] In some embodiments, the guardband in the first frequency structure for SBFD is determined by extending the cell-specific guardband to the portion of the cell-specific uplink subband.
[0297] In some embodiments, the at least one guardband may include a first guardband and a second guardband, and the at least one cell-specific guardband may include a first cell-specific guardband and a second cell-specific guardband. The uplink subband in the first frequency structure for SBFD is determined by substracting a first portion from a first side of the cell-specific uplink subband; and substracting a second portion from a second side of the cell-specific uplink subband.
[0298] In some embodiments, the at least one guardband in the first frequency structure for SBFD is determined by extending the first cell-specific guardband to the first portion of the cell-specific uplink subband; and extending the second cell-specific guardband to the second portion of the cell-specific uplink subband.
[0299] In some embodiments, the first configuration may include a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband. In the case that a value for a size difference between the cell-specific uplink subband and the uplink subband is an even value, a size of the first portion and a size of the second portion are equal to half of the value for the size difference.
[0300] In some embodiments, the first configuration may include a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband. In the case that a value for a size difference between the cell-specific uplink subband and the uplink subband is an odd value, a sum of a size of the first portion and a size of the second portion is equal to the value for the size difference, and the size of the first portion is larger than the size of the second portion by one.
[0301] In some embodiments, the first frequency structure for SBFD may include at least one downlink subband determined based on the first configuration.
[0302] In some embodiments, the first frequency structure for SBFD may further include at least one guardband determined based on the second frequency structure for SBFD and the at least one downlink subband.
[0303] In some embodiments, a RB belongs to the at least one guardband in the case that the RB belongs to at least one cell-specific downlink subband in the second frequency structure for SBFD but does not belong to the at least one downlink subband in the first frequency structure for SBFD.
[0304] In some embodiments, the first configuration may include a value for a size of each of the at least one downlink subband.
[0305] In some embodiments, the first configuration may include a start RB and a size of each of the at least one downlink subband.
[0306] In some embodiments, the first configuration may include at least one RIV, each comprising a start RB and a size of one of the downlink subband.
[0307] In some embodiments, the first configuration may include a value for one size difference, wherein a difference between a size of each of the at least one cell-specific downlink subband and a size of each of the at least one downlink subband in the first frequency structure for SBFD equals to the size difference.
[0308] In some embodiments, the first configuration may include a value for a first size difference and a value for a second size difference. A difference between a size of a first one of the at least one cell-specific downlink subband and a size of a second one of the at least one downlink subband in the first frequency structure for SBFD equals to the first size difference. A difference between a size of a second one of the at least one cell-specific downlink subband and a size of a second one of the at least one downlink subband in the first frequency structure for SBFD equals to the second size difference.
[0309] In some embodiments, the apparatus may further comprise: means for communicating with the terminal device based on the first frequency structure for SBFD.
[0310] In some embodiments, the apparatus may further comprise: means for receiving, from the terminal device, information of a capability related to the terminal device supporting a guardband prior to transmitting the first configuration.
[0311] In some embodiments, the capability may be associated with at least one of the following: a size of a bandwidth part; a waveform; or a carrier.
[0312] In some embodiments, the apparatus may further comprise: means for transmitting, to the terminal device, an indication of requirements for guardband of the network device. The information of the capability is received in the case that the capability of the terminal device satisfies the requirements for guardband.
[0313] In some embodiments, an access of the terminal device to the cell of the network device is ceased in the case that the capability of the terminal device does not satisfy the requirements for guardband.
[0314] In some embodiments, the information of the capability may include a guardband size supported by the terminal device, and the requirements for guardband may include a guardband size threshold required by the network device. The capability of the terminal device satisfies the requirements for guardband in the case that the guardband size supported by the terminal device is no greater than the guardband size threshold.
[0315] In some embodiments, the information of the capability may include a guardband size supported by the terminal device, and a size of each of the at least one guardband in the first frequency structure for SBFD is no less than the guardband size supported by the terminal device.
[0316] In some embodiments, the apparatus further comprises means for performing other steps in some embodiments of the method 1000. In some embodiments, the means comprises at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the apparatus.
[0317] Fig. 11 is a simplified block diagram of a device 1100 that is suitable for implementing embodiments of the present disclosure. The device 1100 may be provided to implement the communication device, for example the terminal device 110, or the network device 120 as shown in Fig. 1A. As shown, the device 1100 includes one or more processors 1110, one or more memories 1120 coupled to the processor 1110, and one or more communication modules 1140 coupled to the processor 1110.
[0318] The communication module 1140 is for bidirectional communications. The communication module 1140 has at least one antenna to facilitate communication. The communication interface may represent any interface that is necessary for communication with other network elements.
[0319] The processor 1110 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 1100 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.
[0320] The memory 1120 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) 1124, an electrically programmable read only memory (EPROM) , a flash memory, a hard disk, a compact disc (CD) , a digital video disk (DVD) , and other magnetic storage and / or optical storage. Examples of the volatile memories include, but are not limited to, a random access memory (RAM) 1122 and other volatile memories that will not last in the power-down duration.
[0321] A computer program 1130 includes computer executable instructions that are executed by the associated processor 1110. The program 1130 may be stored in the ROM 820. The processor 1110 may perform any suitable actions and processing by loading the program 1130 into the RAM 1120.
[0322] The embodiments of the present disclosure may be implemented by means of the program 1130 so that the device 1100 may perform any process of the disclosure as discussed with reference to Figs. 2 to 10. The embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
[0323] In some embodiments, the program 1130 may be tangibly contained in a computer readable medium which may be included in the device 1100 (such as in the memory 1120) or other storage devices that are accessible by the device 1100. The device 1100 may load the program 1130 from the computer readable medium to the RAM 1122 for execution. The computer readable medium may include any types of tangible non-volatile storage, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like. Fig. 12 shows an example of the computer readable medium 1200 in form of CD or DVD. The computer readable medium has the program 1130 stored thereon.
[0324] 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, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While 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.
[0325] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out and of the methods, 700, 800, 900 or 1000 as described above with reference to Figs. 7-10. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
[0326] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes 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 codes, 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.
[0327] In the context of the present disclosure, the computer program codes 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.
[0328] The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. 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) .
[0329] Further, while 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, while 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. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.
[0330] Although the present disclosure has been described in languages specific to structural features and / or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims
1.A terminal device comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the terminal device at least to:receive, from a network device, a first configuration specific to the terminal device; anddetermine a first frequency structure for sub-band full duplex, SBFD, at least based on the first configuration, wherein at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively.2.The terminal device of claim 1, wherein the terminal device is further caused to:receive, from the network device, a second configuration, wherein the second configuration is a cell-specific configuration; anddetermine a second frequency structure for SBFD based on the second configuration, wherein the second frequency structure for SBFD comprises the at least one cell-specific guardband;wherein the first frequency structure for SBFD is determined based on the second frequency structure for SBFD and the first configuration.3.The terminal device of claim 2, wherein determining the first frequency structure for SBFD comprises:determining an uplink subband in the first frequency structure for SBFD by substracting at least one portion of a cell-specific uplink subband in the second frequency structure for SBFD from the cell-specific uplink subband based on the first configuration.4.The terminal device of claim 2, wherein determining the first frequency structure for SBFD comprises:determining at least one downlink subband in the first frequency structure for SBFD by substracting at least one portion of at least one cell-specific downlink subband in the second frequency structure from the at least one cell-specific downlink subband, respectively, based on the first configuration.5.The terminal device of claim 3 or 4, wherein determining the first frequency structure for SBFD further comprises:determining the at least one guardband in the first frequency structure for SBFD by extending the at least one cell-specific guardband to the at least one portion.6.The terminal device of claim 3 or 4, wherein the first configuration comprises one of the following:a value for one size difference, wherein each of the at least one portion has a size equal to the value for the size difference;a value for a first size difference and a value for a second size difference, wherein a first one of the at least one portion has a size equal to the value for the first size difference, and a second one of the at least one portion has a size equal to the value for the second size difference;a value for one guardband size, wherein each of the at least one portion has a size equal to a difference between the value for the guardband size and a size of each of the at least one cell-specific guardband; ora value for a first guardband size and a value for a second guardband size, wherein a first one of the at least one portion has a size equal to a difference between the value for the first guardband size and a size of a first one of the at least one cell-specific guardband, and a second one of the at least one portion has a size equal to a difference between the value for the second guardband size and a size of a second one of the at least one cell-specific guardband.7.The terminal device of claim 2, wherein determining the first frequency structure for SBFD comprises:determining an uplink subband in the first frequency structure for SBFD based on the first configuration.8.The terminal device of claim 7, wherein determining the first frequency structure for SBFD further comprises:determining the at least one guardband in the first frequency structure for SBFD based on the second frequency structure for SBFD and the uplink subband.9.The terminal device of claim 8, wherein a resource block, RB, belongs to the at least one guardband in the case that the RB belongs to a cell-specific uplink subband in the second frequency structure for SBFD but does not belong to the uplink subband in the first frequency structure for SBFD.10.The terminal device of claim 7, wherein the first configuration comprises one of the following:a value for a size of the uplink subband;a start RB and a size of the uplink subband;a resource indicator value, RIV, comprising a start RB and a size of the uplink subband; ora value for a size difference between the cell-specific uplink subband and the uplink subband in the first frequency structure for SBFD.11.The terminal device of claim 10, wherein the first configuration comprises a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband, the at least one guardband comprises one guardband, and the at least one cell-specific guardband comprises one cell-specific guardband,wherein determining the uplink subband in the first frequency structure for SBFD comprises:substracting a portion with a size equal to a size difference between the cell-specific uplink subband and the uplink subband from the cell-specific uplink subband.12.The terminal device of claim 11, wherein determining the first frequency structure for SBFD further comprises:determining the at least one guardband in the first frequency structure for SBFD by extending the cell-specific guardband to the portion of the cell-specific uplink subband.13.The terminal device of claim 10, wherein the at least one guardband comprises a first guardband and a second guardband, and the at least one cell-specific guardband comprises a first cell-specific guardband and a second cell-specific guardband,wherein determining the uplink subband in the first frequency structure for SBFD comprises:substracting a first portion from a first side of the cell-specific uplink subband; andsubstracting a second portion from a second side of the cell-specific uplink subband.14.The terminal device of claim 13, wherein determining the first frequency structure for SBFD further comprises:determining the at least one guardband in the first frequency structure for SBFD by:extending the first cell-specific guardband to the first portion of the cell-specific uplink subband; andextending the second cell-specific guardband to the second portion of the cell-specific uplink subband.15.The terminal device of claim 13 or 14, wherein the first configuration comprises a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband, and in the case that a value for a size difference between the cell-specific uplink subband and the uplink subband is an even value, a size of the first portion and a size of the second portion are equal to half of the value for the size difference.16.The terminal device of claim 13 or 14, wherein the first configuration comprises a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband, and in the case that a value for a size difference between the cell-specific uplink subband and the uplink subband is an odd value, a sum of a size of the first portion and a size of the second portion is equal to the value for the size difference, and the size of the first portion is different from the size of the second portion by one.17.The terminal device of claim 2, wherein determining the first frequency structure for SBFD comprises:determining at least one downlink subband in the first frequency structure for SBFD based on the first configuration.18.The terminal device of claim 17, wherein determining the first frequency structure for SBFD further comprises:determining the at least one guardband in the first frequency structure for SBFD based on the second frequency structure for SBFD and the at least one downlink subband.19.The terminal device of claim 18, wherein a RB belongs to the at least one guardband in the case that the RB belongs to at least one cell-specific downlink subband in the second frequency structure for SBFD but does not belong to the at least one downlink subband in the first frequency structure for SBFD.20.The terminal device of claim 17, wherein the first configuration comprises one of the following:a value for a size of each of the at least one downlink subband;a start RB and a size of each of the at least one downlink subband;at least one RIV, each comprising a start RB and a size of one of the downlink subband;a value for one size difference, wherein a difference between a size of each of the at least one cell-specific downlink subband and a size of each of the at least one downlink subband in the first frequency structure for SBFD equals to the size difference; ora value for a first size difference and a value for a second size difference, wherein a difference between a size of a first one of the at least one cell-specific downlink subband and a size of a second one of the at least one downlink subband in the first frequency structure for SBFD equals to the first size difference, and a difference between a size of a second one of the at least one cell-specific downlink subband and a size of a second one of the at least one downlink subband in the first frequency structure for SBFD equals to the second size difference.21.The terminal device of any of claims 1-20, wherein the terminal device is further caused to:communicate with the network device based on the first frequency structure for SBFD.22.The terminal device of any of claims 1-21, wherein the terminal device is further caused to:prior to receiving the first configuration, transmit, to the network device, information of a capability related to the terminal device supporting a guardband.23.The terminal device of claim 22, wherein the capability is associated with at least one of the following:a size of a bandwidth part;a waveform; ora carrier.24.The terminal device of claim 22 or 23, wherein the terminal device is further caused to:receive, from the network device, an indication of requirements for guardband of the network device;wherein the information of the capability is transmitted in the case that the capability of the terminal device satisfies the requirements for guardband.25.The terminal device of claim 24, wherein the terminal device is further caused to:cease accessing a cell of the network device in the case that the capability of the terminal device does not satisfy the requirements for guardband.26.The terminal device of claim 24, wherein the information of the capability comprises a guardband size supported by the terminal device, and the requirements for guardband comprises a guardband size threshold required by the network device, and wherein the terminal device is further caused to:determine that the capability of the terminal device satisfies the requirements for guardband in the case that the guardband size supported by the terminal device is no larger than the guardband size threshold.27.The terminal device of claim 22, wherein the information of the capability comprises a guardband size supported by the terminal device, and a size of each of the at least one guardband in the first frequency structure for SBFD is no less than the guardband size supported by the terminal device.28.A terminal device comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the terminal device at least to:receive, from a network device, an indication of requirements for guardband of a cell of the network device; andtransmit, to the network device, information of a capability related to the terminal device supporting a guardband in the case that the capability of the terminal device satisfies the requirements for guardband.29.The terminal device of claim 28, wherein the capability is associated with at least one of the following:a size of a bandwidth part;a waveform; ora carrier.30.The terminal device of claim 28 or 29, wherein the terminal device is further caused to:after transmitting the information of the capability, receive, from the network device, a sub-band full duplex, SBFD, configuration specific to the terminal device.31.The terminal device of claim 28 or 29, wherein the terminal device is further caused to:cease accessing the cell of the network device in the case that the capability of the terminal device does not satisfy the requirements for guardband.32.The terminal device of any of claims 28-30, wherein the information of the capability comprises a guardband size supported by the terminal device, and the requirements for guardband comprises a guardband size threshold required by the network device, and wherein the terminal device is further caused to:determine that the capability of the terminal device satisfies the requirements for guardband in the case that the guardband size supported by the terminal device is no greater than the guardband size threshold.33.A network device comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the network device at least to:determine a first configuration specific to a terminal device, wherein the first configuration is associated with a first frequency structure for sub-band full duplex, SBFD, and at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively; andtransmit the first configuration to the terminal device.34.The network device of claim 33, wherein the network device is further caused to:determine a second configuration, wherein the second configuration is a cell-specific configuration and is associated with a second frequency structure for SBFD, and the second frequency structure for SBFD comprises the at least one cell-specific guardband;transmit the second configuration to the terminal device; andwherein the first frequency structure for SBFD is determined based on the second frequency structure for SBFD and the first configuration.35.The network device of claim 34, wherein the first frequency structure for SBFD comprises:an uplink subband determined by substracting at least one portion of a cell-specific uplink subband in the second frequency structure for SBFD from the cell-specific uplink subband based on the first configuration.36.The network device of claim 34, wherein the first frequency structure for SBFD comprises:at least one downlink subband determined by substracting at least one portion of at least one cell-specific downlink subband in the second frequency structure from the at least one cell-specific downlink subband, respectively, based on the first configuration.37.The network device of claim 35 or 36, wherein the first frequency structure for SBFD further comprises:at least one guardband determined by extending the at least one cell-specific guardband to the at least one portion.38.The network device of claim 35 or 36, wherein the first configuration comprises one of the following:a value for one size difference, wherein each of the at least one portion has a size equal to the value for the size difference;a value for a first size difference and a value for a second size difference, wherein a first one of the at least one portion has a size equal to the value for the first size difference, and a second one of the at least one portion has a size equal to the value for the second size difference;a value for one guardband size, wherein each of the at least one portion has a size equal to a difference between the value for the guardband size and a size of each of the at least one cell-specific guardband; ora value for a first guardband size and a value for a second guardband size, wherein a first one of the at least one portion has a size equal to a difference between the value for the first guardband size and a size of a first one of the at least one cell-specific guardband, and a second one of the at least one portion has a size equal to a difference between the value for the second guardband size and a size of a second one of the at least one cell-specific guardband.39.The network device of claim 34, wherein the first frequency structure for SBFD comprises:an uplink subband determined based on the first configuration.40.The network device of claim 39, wherein the first frequency structure for SBFD further comprises:at least one guardband determined based on the second frequency structure for SBFD and the uplink subband.41.The network device of claim 40, wherein a resource block, RB, belongs to the at least one guardband in the case that the RB belongs to a cell-specific uplink subband in the second frequency structure for SBFD but does not belong to the uplink subband in the first frequency structure for SBFD.42.The network device of claim 40, wherein the first configuration comprises one of the following:a value for a size of the uplink subband;a start RB and a size of the uplink subband;a resource indicator value, RIV, comprising a start RB and a size of the uplink subband; ora value for a size difference between the cell-specific uplink subband and the uplink subband in the first frequency structure for SBFD.43.The network device of claim 42, wherein the first configuration comprises a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband, the at least one guardband comprises one guardband, and the at least one cell-specific guardband comprises one cell-specific guardband,wherein the uplink subband in the first frequency structure for SBFD is determined by substracting a portion with a size equal to a size difference between the cell-specific uplink subband and the uplink subband from the cell-specific uplink subband.44.The network device of claim 43, wherein the guardband in the first frequency structure for SBFD is determined by extending the cell-specific guardband to the portion of the cell-specific uplink subband.45.The network device of claim 42, wherein the at least one guardband comprises a first guardband and a second guardband, and the at least one cell-specific guardband comprises a first cell-specific guardband and a second cell-specific guardband,wherein the uplink subband in the first frequency structure for SBFD is determined by substracting a first portion from a first side of the cell-specific uplink subband; and substracting a second portion from a second side of the cell-specific uplink subband.46.The network device of claim 45, wherein the at least one guardband in the first frequency structure for SBFD is determined by extending the first cell-specific guardband to the first portion of the cell-specific uplink subband; and extending the second cell-specific guardband to the second portion of the cell-specific uplink subband.47.The network device of claim 45 or 46, wherein the first configuration comprises a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband, and in the case that a value for a size difference between the cell-specific uplink subband and the uplink subband is an even value, a size of the first portion and a size of the second portion are equal to half of the value for the size difference.48.The network device of claim 45 or 46, wherein the first configuration comprises a value for a size of the uplink subband or a value for a size difference between the cell-specific uplink subband and the uplink subband, and in the case that a value for a size difference between the cell-specific uplink subband and the uplink subband is an odd value, a sum of a size of the first portion and a size of the second portion is equal to the value for the size difference, and the size of the first portion is larger than the size of the second portion by one.49.The network device of claim 34, wherein the first frequency structure for SBFD comprises:at least one downlink subband determined based on the first configuration.50.The network device of claim 49, wherein the first frequency structure for SBFD further comprises:at least one guardband determined based on the second frequency structure for SBFD and the at least one downlink subband.51.The network device of claim 50, wherein a RB belongs to the at least one guardband in the case that the RB belongs to at least one cell-specific downlink subband in the second frequency structure for SBFD but does not belong to the at least one downlink subband in the first frequency structure for SBFD.52.The network device of claim 49, wherein the first configuration comprises one of the following:a value for a size of each of the at least one downlink subband;a start RB and a size of each of the at least one downlink subband;at least one resource indicator value, RIV, each comprising a start RB and a size of one of the downlink subband;a value for one size difference, wherein a difference between a size of each of the at least one cell-specific downlink subband and a size of each of the at least one downlink subband in the first frequency structure for SBFD equals to the size difference; ora value for a first size difference and a value for a second size difference, wherein a difference between a size of a first one of the at least one cell-specific downlink subband and a size of a second one of the at least one downlink subband in the first frequency structure for SBFD equals to the first size difference, and a difference between a size of a second one of the at least one cell-specific downlink subband and a size of a second one of the at least one downlink subband in the first frequency structure for SBFD equals to the second size difference.53.The network device of any of claims 33-52, wherein the network device is further caused to:communicate with the terminal device based on the first frequency structure for SBFD.54.The network device of any of claims 33-53, wherein the network device is further caused to:prior to transmitting the first configuration, receive, from the terminal device, information of a capability related to the terminal device supporting a guardband.55.The network device of claim 54, wherein the capability is associated with at least one of the following:a size of a bandwidth part;a waveform; ora carrier.56.The network device of claim 54 or 55, wherein the network device is further caused to:transmit, to the terminal device, an indication of requirements for guardband of the network device;wherein the information of the capability is received in the case that the capability of the terminal device satisfies the requirements for guardband.57.The network device of claim 56, wherein an access of the terminal device to the cell of the network device is ceased in the case that the capability of the terminal device does not satisfy the requirements for guardband.58.The network device of claim 56 or 57, wherein the information of the capability comprises a guardband size supported by the terminal device, and the requirements for guardband comprises a guardband size threshold required by the network device, and wherein the capability of the terminal device satisfies the requirements for guardband in the case that the guardband size supported by the terminal device is no greater than the guardband size threshold.59.The network device of claim 54, wherein the information of the capability comprises a guardband size supported by the terminal device, and a size of each of the at least one guardband in the first frequency structure for SBFD is no less than the guardband size supported by the terminal device.60.A network device comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the network device at least to:transmit, to a terminal device, an indication of requirements for guardband of a cell of the network device; andreceive, from the terminal device, information of a capability related to the terminal device supporting a guardband, wherein the capability of the terminal device satisfies the requirements for guardband.61.The network device of claim 60, wherein the capability is associated with at least one of the following:a size of a bandwidth part;a waveform; ora carrier.62.The network device of claim 60 or 61, wherein the network device is further caused to:determine a sub-band full duplex, SBFD, configuration specific to the terminal device at least based on the information of the capability; andtransmit, to the terminal device, the SBFD configuration specific to the terminal device.63.The network device of claim 60 or 61, wherein an access of the terminal device to the cell of the network device is ceased in the case that the capability of the terminal device does not satisfy the requirements for guardband.64.The network device of any of claims 60-62, wherein the information of the capability comprises a guardband size supported by the terminal device, and the requirements for guardband comprises a guardband size threshold required by the network device, and wherein the capability of the terminal device satisfies the requirements for guardband in the case that the guardband size supported by the terminal device is no greater than the guardband size threshold.65.A method performed by a terminal device, comprising:receiving, from a network device, a first configuration specific to the terminal device; anddetermining a first frequency structure for sub-band full duplex, SBFD, at least based on the first configuration, wherein at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively.66.A method performed by a terminal device, comprising:receiving, from a network device, an indication of requirements for guardband of a cell of the network device; andtransmitting, to the network device, information of a capability related to the terminal device supporting a guardband in the case that the capability of the terminal device satisfies the requirements for guardband.67.A method performed by a network device, comprising:determining a first configuration specific to a terminal device, wherein the first configuration is associated with a first frequency structure for sub-band full duplex, SBFD, and at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively; andtransmitting the first configuration to the terminal device.68.A method performed by a network device, comprising:transmitting, to a terminal device, an indication of requirements for guardband of a cell of the network device; andreceiving, from the terminal device, information of a capability related to the terminal device supporting a guardband, wherein the capability of the terminal device satisfies the requirements for guardband.69.An apparatus comprising:means for receiving, from a network device, a first configuration specific to the terminal device; andmeans for determining a first frequency structure for sub-band full duplex, SBFD, at least based on the first configuration, wherein at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively.70.An apparatus comprising:means for receiving, from a network device, an indication of requirements for guardband of a cell of the network device; andmeans for transmitting, to the network device, information of a capability related to the terminal device supporting a guardband in the case that the capability of the terminal device satisfies the requirements for guardband.71.An apparatus comprising:means for determining a first configuration specific to a terminal device, wherein the first configuration is associated with a first frequency structure for sub-band full duplex, SBFD, and at least one guardband in the first frequency structure for SBFD is larger than at least one cell-specific guardband, respectively; andmeans for transmitting the first configuration to the terminal device.72.An apparatus comprising:means for transmitting, to a terminal device, an indication of requirements for guardband of a cell of the network device; andmeans for receiving, from the terminal device, information of a capability related to the terminal device supporting a guardband, wherein the capability of the terminal device satisfies the requirements for guardband.73.A computer readable medium comprising program instructions that, when executed by an apparatus, cause the apparatus to perform at least one of the methods of claims 63-66.
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