Devices and methods for sub-band full duplex relatedtransmission
By configuring devices to manage resource allocation and remapping across SBFD and non-SBFD slots, the solution addresses interference and latency issues in duplex communication systems, enhancing communication efficiency.
Patent Information
- Application Number
- PCT/CN2024/088135
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-10-23
AI Technical Summary
Existing duplex communication systems face challenges in managing enhanced cross-link interference during overlapping full-duplex operations, particularly in Time Division Duplex (TDD) communications, necessitating improved random access procedures across sub-band full duplex (SBFD) and non-SBFD resources.
A terminal device and network device are configured to exchange configuration information for random access and uplink transmission procedures across SBFD and non-SBFD resources, including indications for resource continuation and remapping, allowing for flexible and efficient resource allocation and reducing latency.
The proposed solution enables seamless resource management across SBFD and non-SBFD slots, reducing interference and latency in duplex communication systems.
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Figure CN2024088135_23102025_PF_FP_ABST
Abstract
Description
DEVICES AND METHODS FOR SUB-BAND FULL DUPLEX RELATEDTRANSMISSIONFIELD
[0001] Example embodiments of the present disclosure generally relate to the field of communication techniques and in particular, to devices and methods for sub-band full duplex (SBFD) related transmission.BACKGROUND
[0002] Duplex communications have been proposed and developed. Generally, there are two duplexing modes: Frequency Division Duplex (FDD) for paired bands and Time Division Duplex (TDD) for unpaired bands. SBFD has been proposed as a scheme of an enhanced duplex operation.
[0003] Now, some studies are made to shifting from non-overlapping full-duplex operations into overlapping full-duplex operations where interference between cells during TDD will be apparent. Enhanced cross-link interference (CLI) measurement schemes are thus required for overlapping duplex communications, especially in the TDD communications domain. However, to enable Random Access (RA) across SBFD and non-SBFD slots, enhancements need to be made.SUMMARY
[0004] In a first aspect, there is provided a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, configuration information for a random access procedure to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, or information about at least one resource on which the random access procedure is to be continued, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and transmit, to the network device, a message related to the random access procedure based on the configuration information.
[0005] In a second aspect, there is provided a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, configuration information for a random access procedure to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, or information about at least one resource on which the random access procedure is to be continued, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and receive, from the terminal device, a message related to the random access procedure based on the configuration information.
[0006] In a third aspect, there is provided a terminal device comprising: a processor configured to cause the terminal device to: in response to a failure of receiving, from a network device, a message in a first random access procedure performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, select a random backoff time from an updated backoff time range, the updated backoff time range being determined based on a slot configured for uplink transmission which is after the SBFD resource in time domain; and transmit, to the network device, a random access preamble for a second random access procedure after the first random access procedure at the random backoff time.
[0007] In a fourth aspect, there is provided a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, configuration information for an uplink transmission to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, or information about at least one resource on which the uplink transmission is to be performed, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and transmit, to the network device, the uplink transmission based on the configuration information.
[0008] In a fifth aspect, there is provided a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, configuration information for an uplink transmission to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, or information about at least one resource on which the uplink transmission is to be performed, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and receive, from the terminal device, the uplink transmission based on the configuration information.
[0009] In a sixth aspect, there is provided a communication method performed by a terminal device. The method comprises: receiving, from a network device, configuration information for a random access procedure to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, or information about at least one resource on which the random access procedure is to be continued, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and transmitting, to the network device, a message related to the random access procedure based on the configuration information.
[0010] In a seventh aspect, there is provided a communication method performed by a network device. The method comprises: transmitting, to a terminal device, configuration information for a random access procedure to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, or information about at least one resource on which the random access procedure is to be continued, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and receiving, from the terminal device, a message related to the random access procedure based on the configuration information.
[0011] In an eighth aspect, there is provided a communication method performed by a terminal device. The method comprises: in response to a failure of receiving, from a network device, a message in a first random access procedure performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, selecting a random backoff time from an updated backoff time range, the updated backoff time range being determined based on a slot configured for uplink transmission which is after the SBFD resource in time domain; and transmitting, to the network device, a random access preamble for a second random access procedure after the first random access procedure at the random backoff time.
[0012] In a ninth aspect, there is provided a communication method performed by a terminal device. The method comprises: receiving, from a network device, configuration information for an uplink transmission to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, or information about at least one resource on which the uplink transmission is to be performed, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and transmitting, to the network device, the uplink transmission based on the configuration information.
[0013] In a tenth aspect, there is provided a communication method performed by a network device. The method comprises: transmitting, to a terminal device, configuration information for an uplink transmission to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, or information about at least one resource on which the uplink transmission is to be performed, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and receiving, from the terminal device, the uplink transmission based on the configuration information.
[0014] In an eleventh aspect, there is provided a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to carry out the method according to the sixth, seventh, eighth, ninth, or tenth aspect.
[0015] Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Through the more detailed description of some example embodiments of the present disclosure in the accompanying drawings, the above and other objects, features and advantages of the present disclosure will become more apparent, wherein:
[0017] FIG. 1 illustrates an example communication environment in which example embodiments of the present disclosure can be implemented;
[0018] FIG. 2 illustrates a schematic diagram of an example of a random access procedure performed across SBFD slot and non-SBFD slot;
[0019] FIG. 3A illustrates a signaling flow of a random access procedure performed across SBFD slot and non-SBFD slot in accordance with some embodiments of the present disclosure;
[0020] FIG. 3B illustrates a signaling flow of uplink transmission performed across SBFD slot and non-SBFD slot in accordance with some embodiments of the present disclosure;
[0021] FIG. 4 illustrates a signaling flow of a random access procedure across SBFD in accordance with some embodiments of the present disclosure;
[0022] FIG. 5 illustrates a flowchart of a method implemented at a terminal device according to some example embodiments of the present disclosure;
[0023] FIG. 6 illustrates a flowchart of a method implemented at a network device according to some example embodiments of the present disclosure;
[0024] FIG. 7 illustrates a flowchart of a method implemented at a terminal device according to some example embodiments of the present disclosure;
[0025] FIG. 8 illustrates a flowchart of a method implemented at a terminal device according to some example embodiments of the present disclosure;
[0026] FIG. 9 illustrates a flowchart of a method implemented at a network device according to some example embodiments of the present disclosure; and
[0027] FIG. 10 illustrates a simplified block diagram of an apparatus that is suitable for implementing example embodiments of the present disclosure.
[0028] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0029] Principle of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. Embodiments described herein can be implemented in various manners other than the ones described below.
[0030] 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.
[0031] As used herein, the term ‘terminal device’ refers to any device having wireless or wired communication capabilities. Examples of the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, devices on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure / network, devices for Integrated Access and Backhaul (IAB) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eXtended Reality (XR) devices including different types of realities such as Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) , the unmanned aerial vehicle (UAV) commonly known as a drone which is an aircraft without any human pilot, devices on high speed train (HST) , or image capture devices such as digital cameras, sensors, gaming devices, music storage and playback appliances, or Internet appliances enabling wireless or wired Internet access and browsing and the like. The ‘terminal device’ can further has ‘multicast / broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4 / IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM. The term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
[0032] The term “network device” refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate. Examples of a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , and the like.
[0033] The terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
[0034] The terminal or the network device may work on several frequency ranges, e.g., FR1 (e.g., 450 MHz to 6000 MHz) , FR2 (e.g., 24.25GHz to 52.6GHz) , frequency band larger than 100 GHz as well as Tera Hertz (THz) . It can further work on licensed / unlicensed / shared spectrum. The terminal device may have more than one connection with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario. The terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
[0035] The embodiments of the present disclosure may be performed in test equipment, e.g., signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator. In some embodiments, the terminal device may be connected with a first network device and a second network device. One of the first network device and the second network device may be a master node and the other one may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs) . In some embodiments, the first network device may be a first RAT device and the second network device may be a second RAT device. In some embodiments, the first RAT device is eNB and the second RAT device is gNB. Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device. In some embodiments, first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device. In some embodiments, information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device. Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
[0036] 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. The term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’ The term ‘based on’ is to be read as ‘at least in part based on. ’ The term ‘one embodiment’ and ‘an embodiment’ are to be read as ‘at least one embodiment. ’ The term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’ The terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
[0037] In some examples, values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
[0038] As used herein, the term “resource, ” “transmission resource, ” “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like. In the following, unless explicitly stated, a resource in both frequency domain and time domain will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.
[0039] Principles and implementations of the present disclosure will be described in detail below with reference to the figures.
[0040] FIG. 1 illustrates a schematic diagram of an example communication environment 100 in which example embodiments of the present disclosure can be implemented. In the communication environment 100, a plurality of communication devices, including a terminal device 110 and a network device 120, can communicate with each other.
[0041] In the example of FIG. 1, the terminal device 110 may be a UE and the network device 120 may be a base station serving the UE. The serving area of the network device 120 may be called a cell 102.
[0042] It is to be understood that the number of devices and their connections shown in FIG. 1 are only for the purpose of illustration without suggesting any limitation. The communication environment 100 may include any suitable number of devices configured to implementing example embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional devices may be located in the cell 102, and one or more additional cells may be deployed in the communication environment 100. It is noted that although illustrated as a network device, the network device 120 may be another device than a network device. Although illustrated as a terminal device, the terminal device 110 may be other device than a terminal device.
[0043] In the following, for the purpose of illustration, some example embodiments are described with the terminal device 110 operating as a UE and the network device 120 operating as a base station. However, in some example embodiments, operations described in connection with a terminal device may be implemented at a network device or other device, and operations described in connection with a network device may be implemented at a terminal device or other device.
[0044] In some example embodiments, if the terminal device 110 is a terminal device and the network device 120 is a network device, a link from the network device 120 to the terminal device 110 is referred to as a downlink (DL) , while a link from the terminal device 110 to the network device 120 is referred to as an uplink (UL) . In DL, the network device 120 is a transmitting (TX) device (or a transmitter) and the terminal device 110 is a receiving (RX) device (or a receiver) . In UL, the terminal device 110 is a TX device (or a transmitter) and the network device 120 is a RX device (or a receiver) .
[0045] The communications in the communication environment 100 may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , New Radio (NR) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like. The embodiments of the present disclosure may be performed according to any generation communication protocols either currently known or to be developed in the future. Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
[0046] Reference is made to FIG. 2, which illustrates a schematic diagram 200 of an example of a random access procedure performed across SBFD slot and non-SBFD slot.
[0047] As shown in the example of FIG. 2, there are two resource types exist for both DL and UL transmissions, including,
[0048] ● SBFD resource (for example, SBFD slots / symbols…) , during which the non-overlapping DL sub-bands and UL sub-band (s) both exist, and
[0049] ● Non-SBFD resource (for example, Non-SBFD slots / symbols) , during which the entire band is used for DL or UL (i.e., legacy / full DL / UL / flexible slots) .
[0050] In the example of FIG. 2, there illustrates one SBFD resource 202, and two non-SBFD resources 201 and 203. Both the non-SBFD resources 201 and 203 are for uplink (UL) transmission.
[0051] In the SBFD resource 202, guard resource (s) may be used to separate UL sub-bands and DL sub-bands. The guard resource (s) may be caused as guardband (s) in some cases.
[0052] As shown in FIG. 2, when a random access (RA) procedure 211 leads to a situation where a related timer (e.g., ra-ContentionResolutionTimer) has not run out but the corresponding location is outside of UL bandwidth (BW) , remapping of RA Resource Block (RB) is required for some RA, and some RA need to be indicated if they are allowed to continue after SBFD or do they drop RA.
[0053] To solve the above and other potential issues, embodiments of the present disclosure propose solutions for controlling whether a terminal device can transmit within the SBFD slots and what to do with RA if the terminal device is not able to transmit within SBFD slots, so as to allow the terminal device to know its remapped time and frequency locations within SBFD slots.
[0054] Specifically, according to the proposed solutions, taking FIG. 2 as an example, the RA procedure 211 may be indicated with a resource 212 (named “RA continuation (CONT) ” ) in the non-SBFD resource 203 for UL transmission. In addition, another RA procedure 221 may be indicated with a resource 222 for UL transmission in the SBFD resource 202 to continue the RA procedure. In an other example, a RA procedure with message 3 reception 231 may be indicated with a resource 232 for UL transmission in the SBFD resource 202 to continue the RA procedure.
[0055] More details of embodiments of the present disclosure will be discussed with reference to FIGS. 3A to 9.
[0056] FIG. 3A illustrates a signaling flow 300A of a random access procedure performed across SBFD slot and non-SBFD slot in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 300A will be discussed with reference to FIG. 1, for example, by using the terminal device 110 (e.g., UE) and the network device 120 (e.g., gNB) .
[0057] In the signaling flow 300A, the network device 120 transmits (305) , to the terminal device 110, configuration information for a random access procedure to be performed across a SBFD resource and a non-SBFD resource. The configuration information includes an indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, and / or information about at least one resource on which the random access procedure is to be continued, and / or other necessary information. The at least one resource includes at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain.
[0058] The terminal device 110 receives (310) the configuration information from the network device 120. Accordingly, the terminal device 110 will have the knowledge about whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, for example, according to the explicit indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued. Alternatively, if the terminal device 110 receives the information about at least one resource on which the random access procedure is to be continued, it may know that the random access procedure across a SBFD resource and a non-SBFD resource is allowed based on such “implicit” way of indication.
[0059] The transmission of the configuration information may be implemented in several ways. For example, it may be included in a random access response in the random access procedure, for example, Message 2 in a 4-step random access procedure. In this case, the configuration information may be indicated by one or more bits newly-added to the random access response.
[0060] Alternatively, the configuration information may be included in downlink control information for the random access response. In this case, the configuration information may be indicated by reserved bits in the downlink control information and / or additional bits added to the downlink control information.
[0061] In some embodiments, two of reserved bits in Message 2 of a 4-step random access procedure (Msg2) DCI may be selected to be used as information bits. According to TS 38.212 7.3.1.2.1 Format 1_0, the reserved bits - (16 -A) bits for operation in a cell without shared spectrum access in frequency range 1 and frequency range 2-1, (18 -A) for operation in a cell with shared spectrum access in frequency range 1 or for operation in a cell in frequency range 2-2, where the value of A is the number of bits for the field of 'LSBs of SFN' as defined above. Wherein, the value of A may be taken as 2. In other embodiments, additional two bits can be added into reserved bits of information. On the other hand, two of the reserved bits in Msg2 RAR can be selected to be used as information bits. Current MAC RAR does not have extra reserved bits available, so a new octet may be needed.
[0062] Regarding the information about at least one resource included in the configuration information, it may include either frequency information or time information of the at least one resource, or both.
[0063] In some situations, if Msg3 ra-ContentionResolutionTimer will yield values that cross into SBFD slots, indications for remapped SBFD RBs are needed. In some embodiments, the indication frequency location for remapping may be required. In some other embodiments, the indication time location for remapping may be required.
[0064] In a case that the indication of RB indicates frequency location for remapping (mainly Message 3 in a RA procedure (Msg3) ) is required, the frequency information can be added to Msg2 DCI / RAR. In a case that a 2-bit indication whether the RA is allowed to be continued occupies 2 reserved bits in Msg2 DCI, and if there are 14 reserved bits in Msg2 DCI, 12 reserved bits may remain. the reserved bits may be enough for frequency resource remapping. If not enough, there may be a need to change to RACH-ConfigCommon for set indications of frequency resources. In some embodiments, it may be possible with 12 bits if bandwidth of SBFD is narrow enough to not allow so many options (waiting on other RAN for BW size) .
[0065] On the other hand, if the 2-bit indication is not included in Msg2 DCI, 14 reserved bits may be enough for frequency resource remapping.
[0066] In addition, it may be possible to set frequency resources to very basic design tables with default config values set in RACH-ConfigCommon, possible to limit down to 4 bits instead. Alternatively, in a case that the frequency information is added to Msg2 RAR, with 14 bits usually required for frequency, 2 information bits combined with 14 bits for frequency will form 16 bits which forms a new octet.
[0067] In some implementation, a plurality of candidate frequency positions may be predetermined, e.g., according to specification, or preconfigured based on a RRC message, system information or other suitable message from the network device. Accordingly, the frequency information may just include an indication (for example, an index) of one or more candidate frequency positions. In this way, a frequency position allocated to the terminal device 110 can be indicated in a flexible way with very few bits.
[0068] For example, exact values can be set through RRC or predetermined indicator values (like frequency hopping indicator) . Specifically, the length of the indication (1 or 2 bits) may be shortened at the cost of flexibility and it may be applicable if PUSCH can be a lot smaller in SBFD subject to RAN4 response.
[0069] In some embodiments, there may be an indication of frequency location for RA remapping (Msg4 repetition) included in the configuration information. In some embodiments, the frequency information may be indicated through Msg4 DCI. If no reserved bits are available, some additional bits may be added to DCI 1_0 for this format. Alternatively, the frequency information may be indicated through a frequency hopping-like indication. For example, exact values may be set through RRC or predetermined indicator values (like frequency hopping indicator) . Advantageously, this can shorten the length of the indication (1 or 2 bits) at the cost of flexibility, and can extend to generalized PUCCH applications. For PUCCH that is a lot smaller in SBFD subject to RAN4 response, this embodiment may be also applicable. In view of the above, the terminal device is allowed to continue RA across SBFD and non SBFD slots, leading to decreased RA latency.
[0070] In some embodiments, an indication which indicates time location for RA remapping may be required, and thus may be included in the configuration information. The main difference between such embodiments from the above-discussed embodiments is that the frequency may need to be constantly remapped, and it is possible only minor timing adjustments may be required. In a case that the time information is added to Msg2 DCI, the reserved bits in Msg2 DCI may not be enough, and may require a new DCI format like frequency hopping indicator. Alternatively, in a case that the time information is added to Msg2 RAR, depending on exact configurations, different amounts of octets may be required.
[0071] In some embodiments, for SBFD contention based random access, the following to TS 38.133 6.2.2.2.4 UE behaviour when configured with SBFD may be added:
[0072] In addition to the requirements defined in clause 6.2.2.2.1 and 6.2.2.2.2, a UE configured with SBFD carrier shall use RACH configuration for the SBFD carrier contained in the RRC dedicated signalling. If the cell for the random access procedure is configured with SBFD, the UE shall transmit or re-transmit PRACH preamble on the SBFD carrier if the SS-RSRP measured by the UE on the DL carrier is higher than the rsrp-ThresholdSSB as defined in TS 38.331.
[0073] For SBFD contention based random access, embodiments of the present disclosure propose the following.
[0074] Requirements on the SBFD UE regarding random access procedure are discussed. The random access procedure is initiated to establish uplink time synchronization for a UE which either has not acquired or has lost its uplink synchronization, or to convey UE’s request Other SI, or for beam failure recovery. The random access is specified in clause X of TS 38.213 and the control of the RACH transmission is specified in clause X of TS 38.321. Two types of procedure are defined for the random access, the 4-step RA type, and the 2-step RA type (not yet confirmed, may need taking out) . The decision on which type of procedure to adopt is as described in clause x of TS 38.321.
[0075] The SBFD UE for performing the random access procedure defined in clause X applies:
[0076] ● rsrp-ThresholdSSB as the signaled value of rsrp-ThresholdSSB + 1 dB.
[0077] ● msgA-RSRP-ThresholdSSB as the signaled value of msgA-RSRP-ThresholdSSB + 1 dB.
[0078] ● msgA-RSRP-Threshold as the signaled value of msgA-RSRP-Threshold + 1 dB.
[0079] ● rsrp-ThresholdMsg3 as the signaled value of rsrp-ThresholdMsg3 -1 dB.
[0080] ● rsrp-ThresholdSSB as the signaled value of rsrp-ThresholdSSB-SBFD + 1 dB.
[0081] ● msgA-RSRP-ThresholdSSB as the signaled value of msgA-RSRP-ThresholdSSB-SBFD + 1 dB.
[0082] ● msgA-RSRP-Threshold as the signaled value of msgA-RSRP-Threshold-SBFD + 1 dB.
[0083] ● rsrp-ThresholdMsg3 as the signaled value of rsrp-ThresholdMsg3-SBFD -1 dB.
[0084] The requirements for the 4-step RA type procedure described in clause 6.2.2.2 and the requirements for the 2-step RA type procedure described in the clause 6.2.2.3 are applicable (not sure yet) for TDD and FDD SBFD UEs. The 4-step and 2-step RA requirements for contention based random access defined in clause 6.2.2.2 and 6.2.2.3 respectively apply to HD-FDD UE with the following conditions:
[0085] The SBFD UE operating in HD-FDD mode is not expected to perform PRACH transmission on a PRACH resource of a cell if UE has not received at least one SSB associated with that PRACH resource during the last Tp period in the cell, where Tp=160 ms.
[0086] The SBFD UE operating in HD-FDD mode shall meet the PRACH requirements when performing PRACH transmission on a PRACH resource of a cell provided that the UE has received at least one SSB associated with that PRACH resource during the last Tp period before the PRACH transmission, where Tp=160 ms.
[0087] The thresholdSSB-SBFD are values based on the current SBFD configuration of the adjacent cells of the serving cell of the terminal device 110. The adjacent cells may be one or more cells immediately next to the serving cell. Alternatively, the adjacent cells may be a cell that is not necessarily immediately next to the serving cell but close to the serving cell, for example, within a certain distance with the terminal device 110 or the serving cell.
[0088] In addition to the indication whether the random access procedure is allowed to be continued and / or the information about the allowed resource, the configuration information may further include, for example, but not limited, some parameters associated with the random access procedure.
[0089] In an example, the configuration information may include a first threshold for a receiving power of a synchronization signal. The first threshold may be larger than a first reference threshold of a receiving power of a synchronization signal determined based on one or more SBFD configurations of adjacent cells of a serving cell of the terminal device.
[0090] Additionally, or alternatively, the configuration information may include a second threshold for a receiving power of a synchronization signal for a preamble in the random access procedure. The second threshold may be larger than a second reference threshold of a receiving power of a synchronization signal for a preamble determined based on one or more SBFD configurations of the adjacent cells.
[0091] Additionally, or alternatively, the configuration information may include a third threshold for a receiving power of a preamble in the random access procedure. The third threshold may be larger than a third reference threshold determined based on one or more SBFD configurations of the adjacent cells.
[0092] As a further alternative, or in addition, the configuration information may include a fourth threshold for a receiving power of a random access response in the random access procedure. The fourth threshold may be less than a fourth reference threshold determined based on one or more SBFD configurations of the adjacent cells.
[0093] Still referring to FIG. 2, based on the configuration information received (310) from the network device 120, the terminal device 110 transmits (315) , to the network device 120, a message related to the random access procedure. Accordingly, the network device 120 receives (320) such message from the terminal device 110.
[0094] In some example embodiments, the message transmitted to the network device 120 may be, for example, a connection setup request in the random access procedure, for example, Message 3 in a 4-step random access procedure. Alternatively, the message may be an acknowledgment to a connection setup response (for example, Message 4 in a 4-step random access procedure) in the random access procedure. As a further alternative, the message may include a retransmission of a preamble (e.g., Message 1 in a 4-step random access procedure or Message A in a 2-step random access procedure) in the random access procedure, or a preamble in a new random access procedure.
[0095] In view of the above, the netwrok device 120 informs the terminal device 110 (e.g., UE) if it is able to transmit inside SBFD slots for RA or to continue transmitting after SBFD slots. This allows for UE-specific configurations of RA where individual UE can be selected for continued RA in SBFD. Meanwhile, this sets a priority approach in which RA transmissions can be halted even if they are within the frequency ranges of SBFD.
[0096] Furthermore, with the indication of RB for remapping of RA resources that cross different slots, the above embodiments of the present disclosure allows UE to continue RA across SBFD and non SBFD slots, leading to decreased RA latency.
[0097] FIG. 3B illustrates a signaling flow 300B of uplink transmission performed across SBFD slot and non-SBFD slot in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 300B will be discussed with reference to FIG. 1, for example, by using the terminal device 110 (e.g., UE) and the network device 120 (e.g., gNB) .
[0098] In the signaling flow 300B, the network device 120 transmits to the network device 110 transmits (355) , to the terminal device 110, configuration information for an uplink transmission to be performed across a SBFD resource and a non-SBFD resource. The configuration information includes an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, and / or information about at least one resource on which the uplink transmission is to be performed, and / or other necessary information. The at least one resource includes at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain.
[0099] The terminal device 110 receives (360) the configuration information from the network device 120. Accordingly, the terminal device 110 will have the knowledge about whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be continued, for example, according to the explicit indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be continued. Alternatively, if the terminal device 110 receives the information about at least one resource on which the uplink transmission is to be continued, it may know that the uplink transmission across a SBFD resource and a non-SBFD resource is allowed based on such “implicit” way of indication.
[0100] The transmission of the configuration information may be implemented in several ways. For example, it may be included in downlink control information transmitted from the network device 120. In this case, the configuration information may be indicated by reserved bits in the downlink control information and / or additional bits added to the downlink control information.
[0101] Regarding the information about at least one resource included in the configuration information, it may include either frequency information or time information of the at least one resource, or both.
[0102] In some implementation, a plurality of candidate frequency positions may be predetermined, e.g., according to specification, or preconfigured based on a RRC message, system information or other suitable message from the network device 120. Accordingly, the frequency information may just include an indication (for example, an index) of one or more candidate frequency positions. In this way, a frequency position allocated to the terminal device 110 can be indicated in a flexible way with very few bits.
[0103] Based on the configuration information received (360) from the network device 120, the terminal device 110 transmits (365) the uplink transmission to the network device 120. Accordingly, the network device 120 receives (370) the uplink transmission from the terminal device 110.
[0104] FIG. 4 illustrates a signaling flow 400 of a random access procedure across SBFD in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 400 will be discussed with reference to FIG. 1, for example, by using the terminal device 110 and the network device 120.
[0105] In the signaling flow 400, the terminal device 110 first detects whether a first random access procedure performed across a SBFD resource and a non-SBFD resource is successful. In response to a failure of receiving the message in the first random access procedure, the terminal device 110 selects (405) a random backoff time from an updated backoff time range. The updated backoff time range may be determined based on a slot configured for uplink transmission which is after the SBFD resource in time domain. In some implementations, the updated backoff time range may be determined by adjusting a preconfigured backoff time range with a starting time of the slot.
[0106] The message in the first random access procedure may be, for example, a random access response in the first random access procedure, or a connection setup response in the first random access procedure.
[0107] The terminal device 110 transmits (410) , to the network device 120, a random access preamble for a second random access procedure after the first random access procedure at the random backoff time. The network device 120 receives (415) the random access preamble and thus know the second random access procedure starts.
[0108] In some example embodiments, if a random access response in the first random access procedure is not received but a timer configured for the random access response expires, the terminal device 110 may determine that the failure of receiving the message in the first random access procedure occurs.
[0109] Alternatively, or in addition, if a connection setup response in the first random access procedure is unsuccessfully received, the terminal device 110 may determine that the failure of receiving the message in the first random access procedure occurs.
[0110] In some example embodiments, the message in the first random access procedure comprises at least one of: a random access response in the first random access procedure, or a connection setup response in the first random access procedure.
[0111] In view of the above, embodiments of the present disclosure set rules for random backoff time for Random access response reception or RA procedure, which ensures contention resolution specifications works with SBFD.
[0112] In some implementations, if Msg2 response is not received, rules for random backoff time for Random access response reception may be set to ensure contention resolution specifications works with SBFD. In some embodiments, the UE may be allowed to continue RA across SBFD and non SBFD slots, so that RA latency can be decreased.
[0113] In some cases, if RA starts in frequency outside of SBFD UL BW and RACH exists in SBFD slots, the random backoff time may be changed to uniform distribution between 0 and the PREAMBLE_BACKOFF+starting Time for the next slot configured for UL in tdd-UL-DL-ConfigCommon. For example, the random backoff time may be selected from the updated backoff time range as follows:
[0114] [0+ starting Time, the PREAMBLE_BACKOFF+starting Time] ,
[0115] where PREAMBLE_BACKOFF indicates the maximum value for the random backoff time, and the updated is obtain based on a preconfigured backoff time range:
[0116] [0, the PREAMBLE_BACKOFF] .
[0117] Otherwise, the random backoff time may be selected according to a uniform distribution between 0 and the PREAMBLE_BACKOFF. This indictates that RA starting outside of SBFD slots resolves its contention resolutions scheme outside of SBFD slots. It is worth noting that temporal position doesn't change SBFD's UE behavior.
[0118] In a case that Msg4 response is not received, rules for random backoff time for RA procedure (Msg 4 Ack) may be set to ensure contention resolution specifications works with SBFD. In some cases, if RA starts in frequency outside of SBFD UL BW and RACH exists in SBFD slots, the random backoff time may be changed to uniform distribution between 0 and the PREAMBLE_BACKOFF+starting Time for the next slot configured for UL in tdd-UL-DL-ConfigCommon. In some other cases, the random backoff time may be selected according to a uniform distribution between 0 and the PREAMBLE_BACKOFF. This dictates that RA starting outside of SBFD slots resolves its contention resolutions scheme outside of SBFD slots. It is worth noting that time location will not change UE behavior for SBFD.
[0119] FIG. 5 illustrates a flowchart of a communication method 500 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 500 will be described from the perspective of the terminal device 110 in FIG. 1.
[0120] At block 510, the terminal device 110 receives, from a network device, configuration information for a random access procedure to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, or information about at least one resource on which the random access procedure is to be continued, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain.
[0121] At block 520, the terminal device 110 transmits, to the network device, a message related to the random access procedure based on the configuration information.
[0122] In some example embodiments, the configuration information is comprised in at least one of: a random access response in the random access procedure, or downlink control information for the random access response.
[0123] In some example embodiments, the configuration information is indicated by reserved bits in the downlink control information, or wherein the configuration information is indicated by one or more bits added to the random access response.
[0124] In some example embodiments, the information about at least one resource comprises at least one of frequency information or time information of the at least one resource.
[0125] In some example embodiments, the frequency information comprises an indication of at least one of candidate frequency positions, wherein the candidate frequency positions are predetermined or preconfigured based on at least one of a RRC message or system information from the network device.
[0126] In some example embodiments, the configuration information further comprises at least one of: a first threshold for a receiving power of a synchronization signal, the first threshold being larger than a first reference threshold of a receiving power of a synchronization signal determined based on one or more SBFD configurations of adjacent cells of a serving cell of the terminal device; a second threshold for a receiving power of a synchronization signal for a preamble in the random access procedure, the second threshold being larger than a second reference threshold of a receiving power of a synchronization signal for a preamble determined based on one or more SBFD configurations of the adjacent cells; a third threshold for a receiving power of a preamble in the random access procedure, the third threshold being larger than a third reference threshold determined based on one or more SBFD configurations of the adjacent cells; or a fourth threshold for a receiving power of a random access response in the random access procedure, the fourth threshold being less than a fourth reference threshold determined based on one or more SBFD configurations of the adjacent cells.
[0127] In some example embodiments, the message transmitted to the network device comprises at least one of: a connection setup request in the random access procedure, an acknowledgment to a connection setup response in the random access procedure, or a retransmission of a preamble in the random access procedure.
[0128] FIG. 6 illustrates a flowchart of a communication method 600 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 600 will be described from the perspective of the network device 120 in FIG. 1.
[0129] At block 610, the network device 120 transmits, to a terminal device, configuration information for a random access procedure to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, or information about at least one resource on which the random access procedure is to be continued, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain.
[0130] At block 620, the network device 120 receives, from the terminal device, a message related to the random access procedure based on the configuration information.
[0131] In some example embodiments, the configuration information is comprised in at least one of: a random access response in the random access procedure, or downlink control information for the random access response.
[0132] In some example embodiments, the configuration information is indicated by reserved bits in the downlink control information, or wherein the configuration information is indicated by one or more bits added to the random access response.
[0133] In some example embodiments, the information about at least one resource comprises at least one of frequency information or time information of the at least one resource.
[0134] In some example embodiments, the frequency information comprises an indication of at least one of candidate frequency positions, wherein the candidate frequency positions are predetermined or preconfigured based on at least one of a RRC message or system information from the network device.
[0135] In some example embodiments, the configuration information further comprises at least one of: a first threshold for a receiving power of a synchronization signal, the first threshold being larger than a first reference threshold of a receiving power of a synchronization signal determined based on one or more SBFD configurations of adjacent cells of a serving cell of the terminal device; a second threshold for a receiving power of a synchronization signal for a preamble in the random access procedure, the second threshold being larger than a second reference threshold of a receiving power of a synchronization signal for a preamble determined based on one or more SBFD configurations of the adjacent cells; a third threshold for a receiving power of a preamble in the random access procedure, the third threshold being larger than a third reference threshold determined based on one or more SBFD configurations of the adjacent cells; or a fourth threshold for a receiving power of a random access response in the random access procedure, the fourth threshold being less than a fourth reference threshold determined based on one or more SBFD configurations of the adjacent cells.
[0136] In some example embodiments, the message transmitted to the network device comprises at least one of: a connection setup request in the random access procedure, an acknowledgment to a connection setup response in the random access procedure, or a retransmission of a preamble in the random access procedure.
[0137] FIG. 7 illustrates a flowchart of a communication method 700 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 700 will be described from the perspective of the terminal device 110 in FIG. 1.
[0138] At block 710, the terminal device 110, in response to a failure of receiving, from a network device, a message in a first random access procedure performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, selects a random backoff time from an updated backoff time range, the updated backoff time range being determined based on a slot configured for uplink transmission which is after the SBFD resource in time domain.
[0139] At block 720, the terminal device 110 transmits, to the network device, a random access preamble for a second random access procedure after the first random access procedure at the random backoff time.
[0140] In some example embodiments, the failure of receiving the message in the first random access procedure comprises at least one of the following events: a random access response in the first random access procedure is not received but a timer configured for the random access response expires, or a connection setup response in the first random access procedure is unsuccessfully received.
[0141] In some example embodiments, the updated backoff time range is determined by adjusting a preconfigured backoff time range with a starting time of the slot.
[0142] In some example embodiments, the message in the first random access procedure comprises at least one of: a random access response in the first random access procedure, or a connection setup response in the first random access procedure.
[0143] FIG. 8 illustrates a flowchart of a communication method 800 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 800 will be described from the perspective of the terminal device 110 in FIG. 1.
[0144] At block 810, the terminal device 110 receive, from a network device, configuration information for an uplink transmission to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, or information about at least one resource on which the uplink transmission is to be performed, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain.
[0145] At block 820, the terminal device 110 transmits, to the network device, the uplink transmission based on the configuration information.
[0146] FIG. 9 illustrates a flowchart of a communication method 900 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 900 will be described from the perspective of the network device 120 in FIG. 1.
[0147] At block 910, the network device 120 transmits, to a terminal device, configuration information for an uplink transmission to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, or information about at least one resource on which the uplink transmission is to be performed, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain.
[0148] At block 920, the network device 120 receives, from the terminal device, the uplink transmission based on the configuration information.
[0149] FIG. 10 is a simplified block diagram of a device 1000 that is suitable for implementing embodiments of the present disclosure. The device 1000 can be considered as a further example implementation of any of the devices as shown in FIG. 1. Accordingly, the device 1000 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
[0150] As shown, the device 1000 includes a processor 1010, a memory 1020 coupled to the processor 1010, a suitable transceiver 1040 coupled to the processor 1010, and a communication interface coupled to the transceiver 1040. The memory 1020 stores at least a part of a program 1030. The transceiver 1040 may be for bidirectional communications or a unidirectional communication based on requirements. The transceiver 1040 may include at least one of a transmitter 1042 and a receiver 1044. The transmitter 1042 and the receiver 1044 may be functional modules or physical entities. The transceiver 1040 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones. The communication interface may represent any interface that is necessary for communication with other network elements, such as X2 / Xn interface for bidirectional communications between eNBs / gNBs, S1 / NG interface for communication between a Mobility Management Entity (MME) / Access and Mobility Management Function (AMF) / SGW / UPF and the eNB / gNB, Un interface for communication between the eNB / gNB and a relay node (RN) , or Uu interface for communication between the eNB / gNB and a terminal device.
[0151] The program 1030 is assumed to include program instructions that, when executed by the associated processor 1010, enable the device 1000 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1 to 9. The embodiments herein may be implemented by computer software executable by the processor 1010 of the device 1000, or by hardware, or by a combination of software and hardware. The processor 1010 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 1010 and memory 1020 may form processing means 1050 adapted to implement various embodiments of the present disclosure.
[0152] The memory 1020 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 1020 is shown in the device 1000, there may be several physically distinct memory modules in the device 1000. The processor 1010 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 1000 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
[0153] According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: receive, from a network device, configuration information for a random access procedure to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, or information about at least one resource on which the random access procedure is to be continued, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and transmit, to the network device, a message related to the random access procedure based on the configuration information. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
[0154] According to embodiments of the present disclosure, a network device comprising a circuitry is provided. The circuitry is configured to: transmit, to a terminal device, configuration information for a random access procedure to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, or information about at least one resource on which the random access procedure is to be continued, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and receive, from the terminal device, a message related to the random access procedure based on the configuration information. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the network device as discussed above.
[0155] According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: in response to a failure of receiving, from a network device, a message in a first random access procedure performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, select a random backoff time from an updated backoff time range, the updated backoff time range being determined based on a slot configured for uplink transmission which is after the SBFD resource in time domain; and transmit, to the network device, a random access preamble for a second random access procedure after the first random access procedure at the random backoff time. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
[0156] According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: receive, from a network device, configuration information for an uplink transmission to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, or information about at least one resource on which the uplink transmission is to be performed, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and transmit, to the network device, the uplink transmission based on the configuration information. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
[0157] According to embodiments of the present disclosure, a network device comprising a circuitry is provided. The circuitry is configured to: transmit, to a terminal device, configuration information for an uplink transmission to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, or information about at least one resource on which the uplink transmission is to be performed, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and receive, from the terminal device, the uplink transmission based on the configuration information. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the network device as discussed above.
[0158] The term “circuitry” used herein may refer to hardware circuits and / or combinations of hardware circuits and software. For example, the circuitry may be a combination of analog and / or digital hardware circuits with software / firmware. As a further example, the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions. In a still further example, the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software / firmware for operation, but the software may not be present when it is not needed for operation. As used herein, the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and / or firmware.
[0159] According to embodiments of the present disclosure, a terminal apparatus is provided. The terminal apparatus comprises means for receiving, from a network device, configuration information for a random access procedure to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: means for an indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, or means for information about at least one resource on which the random access procedure is to be continued, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and means for transmitting, to the network device, a message related to the random access procedure based on the configuration information. In some embodiments, the first apparatus may comprise means for performing the respective operations of the method 500. In some example embodiments, the first apparatus may further comprise means for performing other operations in some example embodiments of the method 500. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0160] According to embodiments of the present disclosure, a network apparatus is provided. The network apparatus comprises means for transmitting, to a terminal device, configuration information for a random access procedure to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: means for an indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, or means for information about at least one resource on which the random access procedure is to be continued, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and means for receiving, from the terminal device, a message related to the random access procedure based on the configuration information. In some embodiments, the second apparatus may comprise means for performing the respective operations of the method 600. In some example embodiments, the second apparatus may further comprise means for performing other operations in some example embodiments of the method 600. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0161] According to embodiments of the present disclosure, a terminal apparatus is provided. The terminal apparatus comprises means for in response to a failure of receiving, from a network device, a message in a first random access procedure performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, selecting a random backoff time from an updated backoff time range, the updated backoff time range being determined based on a slot configured for uplink transmission which is after the SBFD resource in time domain; and means for transmitting, to the network device, a random access preamble for a second random access procedure after the first random access procedure at the random backoff time. In some embodiments, the third apparatus may comprise means for performing the respective operations of the method 700. In some example embodiments, the third apparatus may further comprise means for performing other operations in some example embodiments 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.
[0162] According to embodiments of the present disclosure, a terminal apparatus is provided. The terminal apparatus comprises means for receiving, from a network device, configuration information for an uplink transmission to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: means for an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, or means for information about at least one resource on which the uplink transmission is to be performed, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and means for transmitting, to the network device, the uplink transmission based on the configuration information. In some embodiments, the fourth apparatus may comprise means for performing the respective operations of the method 800. In some example embodiments, the fourth apparatus may further comprise means for performing other operations in some example embodiments 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.
[0163] According to embodiments of the present disclosure, a network apparatus is provided. The network apparatus comprises means for transmitting, to a terminal device, configuration information for an uplink transmission to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: means for an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, or means for information about at least one resource on which the uplink transmission is to be performed, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and means for receiving, from the terminal device, the uplink transmission based on the configuration information. In some embodiments, the fifth apparatus may comprise means for performing the respective operations of the method 900. In some example embodiments, the fifth apparatus may further comprise means for performing other operations in some example embodiments 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.
[0164] In summary, embodiments of the present disclosure provide the following aspects.
[0165] In an aspect, it is proposed a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, configuration information for a random access procedure to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of:an indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, or information about at least one resource on which the random access procedure is to be continued, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and transmit, to the network device, a message related to the random access procedure based on the configuration information.
[0166] In some embodiments, the configuration information is comprised in at least one of:a random access response in the random access procedure, or downlink control information for the random access response.
[0167] In some embodiments, the configuration information is indicated by reserved bits in the downlink control information, or wherein the configuration information is indicated by one or more bits added to the random access response.
[0168] In some embodiments, the information about at least one resource comprises at least one of frequency information or time information of the at least one resource.
[0169] In some embodiments, the frequency information comprises an indication of at least one of candidate frequency positions, wherein the candidate frequency positions are predetermined or preconfigured based on at least one of a RRC message or system information from the network device.
[0170] In some embodiments, the configuration information further comprises at least one of: a first threshold for a receiving power of a synchronization signal, the first threshold being larger than a first reference threshold of a receiving power of a synchronization signal determined based on one or more SBFD configurations of adjacent cells of a serving cell of the terminal device; a second threshold for a receiving power of a synchronization signal for a preamble in the random access procedure, the second threshold being larger than a second reference threshold of a receiving power of a synchronization signal for a preamble determined based on one or more SBFD configurations of the adjacent cells; a third threshold for a receiving power of a preamble in the random access procedure, the third threshold being larger than a third reference threshold determined based on one or more SBFD configurations of the adjacent cells; or a fourth threshold for a receiving power of a random access response in the random access procedure, the fourth threshold being less than a fourth reference threshold determined based on one or more SBFD configurations of the adjacent cells.
[0171] In some embodiments, the message transmitted to the network device comprises at least one of: a connection setup request in the random access procedure, an acknowledgment to a connection setup response in the random access procedure, or a retransmission of a preamble in the random access procedure.
[0172] In an aspect, it is proposed a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, configuration information for a random access procedure to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether a random access procedure across a SBFD resource and a non- SBFD resource is allowed to be continued, or information about at least one resource on which the random access procedure is to be continued, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and receive, from the terminal device, a message related to the random access procedure based on the configuration information.
[0173] In some embodiments, the configuration information is comprised in at least one of: a random access response in the random access procedure, or downlink control information for the random access response.
[0174] In some embodiments, the configuration information is indicated by reserved bits in the downlink control information, or wherein the configuration information is indicated by one or more bits added to the random access response.
[0175] In some embodiments, the information about at least one resource comprises at least one of frequency information or time information of the at least one resource.
[0176] In some embodiments, the frequency information comprises an indication of at least one of candidate frequency positions, wherein the candidate frequency positions are predetermined or preconfigured based on at least one of a RRC message or system information from the network device.
[0177] In some embodiments, the configuration information further comprises at least one of: a first threshold for a receiving power of a synchronization signal, the first threshold being larger than a first reference threshold of a receiving power of a synchronization signal determined based on one or more SBFD configurations of adjacent cells of a serving cell of the terminal device; a second threshold for a receiving power of a synchronization signal for a preamble in the random access procedure, the second threshold being larger than a second reference threshold of a receiving power of a synchronization signal for a preamble determined based on one or more SBFD configurations of the adjacent cells; a third threshold for a receiving power of a preamble in the random access procedure, the third threshold being larger than a third reference threshold determined based on one or more SBFD configurations of the adjacent cells; or a fourth threshold for a receiving power of a random access response in the random access procedure, the fourth threshold being less than a fourth reference threshold determined based on one or more SBFD configurations of the adjacent cells.
[0178] In some embodiments, the message transmitted to the network device comprises at least one of: a connection setup request in the random access procedure, an acknowledgment to a connection setup response in the random access procedure, or a retransmission of a preamble in the random access procedure.
[0179] In an aspect, it is proposed a terminal device comprising: a processor configured to cause the terminal device to: in response to a failure of receiving, from a network device, a message in a first random access procedure performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, select a random backoff time from an updated backoff time range, the updated backoff time range being determined based on a slot configured for uplink transmission which is after the SBFD resource in time domain; and transmit, to the network device, a random access preamble for a second random access procedure after the first random access procedure at the random backoff time.
[0180] In some embodiments, the failure of receiving the message in the first random access procedure comprises at least one of the following events: a random access response in the first random access procedure is not received but a timer configured for the random access response expires, or a connection setup response in the first random access procedure is unsuccessfully received.
[0181] In some embodiments, the updated backoff time range is determined by adjusting a preconfigured backoff time range with a starting time of the slot.
[0182] In some embodiments, the message in the first random access procedure comprises at least one of: a random access response in the first random access procedure, or a connection setup response in the first random access procedure.
[0183] In an aspect, it is proposed a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, configuration information for an uplink transmission to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, or information about at least one resource on which the uplink transmission is to be performed, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and transmit, to the network device, the uplink transmission based on the configuration information.
[0184] In an aspect, it is proposed a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, configuration information for an uplink transmission to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of: an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, or information about at least one resource on which the uplink transmission is to be performed, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; and receive, from the terminal device, the uplink transmission based on the configuration information.
[0185] In an aspect, a terminal device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the terminal device discussed above.
[0186] In an aspect, a network device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the network device discussed above.
[0187] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0188] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0189] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0190] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0191] 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 representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods 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.
[0192] 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 the process or method as described above with reference to FIGS. 1 to 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.
[0193] 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.
[0194] The above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine readable medium may be a machine readable signal medium or a machine readable storage medium. A machine 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 machine 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.
[0195] 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.
[0196] Although the present disclosure has been described in language 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:a processor configured to cause the terminal device to:receive, from a network device, configuration information for a random access procedure to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of:an indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, orinformation about at least one resource on which the random access procedure is to be continued, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; andtransmit, to the network device, a message related to the random access procedure based on the configuration information.2.The device of claim 1, wherein the configuration information is comprised in at least one of:a random access response in the random access procedure, ordownlink control information for the random access response.3.The device of claim 2, wherein the configuration information is indicated by reserved bits in the downlink control information, orwherein the configuration information is indicated by one or more bits added to the random access response.4.The device of any of claims 1 to 3, wherein the information about at least one resource comprises at least one of frequency information or time information of the at least one resource.5.The device of claim 4, wherein the frequency information comprises an indication of at least one of candidate frequency positions, wherein the candidate frequency positions are predetermined or preconfigured based on at least one of a RRC message or system information from the network device.6.The device of any of claims 1 to 5, wherein the configuration information further comprises at least one of:a first threshold for a receiving power of a synchronization signal, the first threshold being larger than a first reference threshold of a receiving power of a synchronization signal determined based on one or more SBFD configurations of adjacent cells of a serving cell of the terminal device;a second threshold for a receiving power of a synchronization signal for a preamble in the random access procedure, the second threshold being larger than a second reference threshold of a receiving power of a synchronization signal for a preamble determined based on one or more SBFD configurations of the adjacent cells;a third threshold for a receiving power of a preamble in the random access procedure, the third threshold being larger than a third reference threshold determined based on one or more SBFD configurations of the adjacent cells; ora fourth threshold for a receiving power of a random access response in the random access procedure, the fourth threshold being less than a fourth reference threshold determined based on one or more SBFD configurations of the adjacent cells.7.The device of any of claims 1 to 6, wherein the message transmitted to the network device comprises at least one of:a connection setup request in the random access procedure,an acknowledgment to a connection setup response in the random access procedure, ora retransmission of a preamble in the random access procedure.8.A network device comprising:a processor configured to cause the network device to:transmit, to a terminal device, configuration information for a random access procedure to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of:an indication whether a random access procedure across a SBFD resource and a non-SBFD resource is allowed to be continued, orinformation about at least one resource on which the random access procedure is to be continued, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; andreceive, from the terminal device, a message related to the random access procedure based on the configuration information.9.The device of claim 8, wherein the configuration information is comprised in at least one of:a random access response in the random access procedure, ordownlink control information for the random access response.10.The device of claim 9, wherein the configuration information is indicated by reserved bits in the downlink control information, orwherein the configuration information is indicated by one or more bits added to the random access response.11.The device of any of claims 8 to 10, wherein the information about at least one resource comprises at least one of frequency information or time information of the at least one resource.12.The device of claim 11, wherein the frequency information comprises an indication of at least one of candidate frequency positions, wherein the candidate frequency positions are predetermined or preconfigured based on at least one of a RRC message or system information from the network device.13.The device of any of claims 8 to 12, wherein the configuration information further comprises at least one of:a first threshold for a receiving power of a synchronization signal, the first threshold being larger than a first reference threshold of a receiving power of a synchronization signal determined based on one or more SBFD configurations of adjacent cells of a serving cell of the terminal device;a second threshold for a receiving power of a synchronization signal for a preamble in the random access procedure, the second threshold being larger than a second reference threshold of a receiving power of a synchronization signal for a preamble determined based on one or more SBFD configurations of the adjacent cells;a third threshold for a receiving power of a preamble in the random access procedure, the third threshold being larger than a third reference threshold determined based on one or more SBFD configurations of the adjacent cells; ora fourth threshold for a receiving power of a random access response in the random access procedure, the fourth threshold being less than a fourth reference threshold determined based on one or more SBFD configurations of the adjacent cells.14.The device of any of claims 8 to 13, wherein the message transmitted to the network device comprises at least one of:a connection setup request in the random access procedure,an acknowledgment to a connection setup response in the random access procedure, ora retransmission of a preamble in the random access procedure.15.A terminal device comprising:a processor configured to cause the terminal device to:in response to a failure of receiving, from a network device, a message in a first random access procedure performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, select a random backoff time from an updated backoff time range, the updated backoff time range being determined based on a slot configured for uplink transmission which is after the SBFD resource in time domain; andtransmit, to the network device, a random access preamble for a second random access procedure after the first random access procedure at the random backoff time.16.The device of claim 15, wherein the failure of receiving the message in the first random access procedure comprises at least one of the following events:a random access response in the first random access procedure is not received but a timer configured for the random access response expires, ora connection setup response in the first random access procedure is unsuccessfully received.17.The device of claim 15 or 16, wherein the updated backoff time range is determined by adjusting a preconfigured backoff time range with a starting time of the slot.18.The device of any of claims 15 to 17, wherein the message in the first random access procedure comprises at least one of:a random access response in the first random access procedure, ora connection setup response in the first random access procedure.19.A terminal device comprising:a processor configured to cause the terminal device to:receive, from a network device, configuration information for an uplink transmission to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of:an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, orinformation about at least one resource on which the uplink transmission is to be performed, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; andtransmit, to the network device, the uplink transmission based on the configuration information.20.A network device comprising:a processor configured to cause the network device to:transmit, to a terminal device, configuration information for an uplink transmission to be performed across a sub-band full duplex (SBFD) resource and a non-SBFD resource, the configuration information comprising at least one of:an indication whether the uplink transmission across a SBFD resource and a non-SBFD resource is allowed to be performed, orinformation about at least one resource on which the uplink transmission is to be performed, wherein the at least one resource comprises at least a part of the SBFD resource or a non-SBFD resource after the SBFD resource in time domain; andreceive, from the terminal device, the uplink transmission based on the configuration information.
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