Wireless communications methods for random access in user equipment, base stations, and sub-band full duplex, sbfd, symbols / slots

Abstract

A wireless communication method of random access in a sub-band full duplex (SBFD) symbol / slot, a user equipment (UE) and a base station are disclosed. The wireless communication method of random access in a SBFD symbol / slot is performed by the UE, comprising: receiving a configuration related to time domain resource for transmitting a physical random channel access (PRACH) preamble in a SBFD symbol / slot; and performing transmission of the PRACH preamble in the SBFD symbol / slot. The configuration related to time domain resource for transmitting the PRACH preamble in the SBFD symbol / slot comprises: a time domain parameter configuration for transmitting a random access preamble in the SBFD symbol / slot provided by a higher layer, and / or a time domain resource configuration table for the random access preamble transmission provided by the higher layer.

Description

Technical Field

[0001] This disclosure relates to the field of wireless communication systems, and more specifically, to a wireless communication method, user equipment (UE), and base station for random access in sub-band full-duplex SBFD symbols / slots. Background Technology

[0002] Several issues exist regarding the timing (RO) configuration of the Random Access Channel (RACH). However, there is currently no consensus on the applicability of current specification rules. Therefore, further research is needed to address these and other issues related to random access in SBFD symbols / slots. Summary of the Invention

[0003] One object of this disclosure is to provide a wireless communication method, user equipment (UE), and base station for random access in sub-band full-duplex SBFD symbols / slots, to address problems in the prior art and other issues.

[0004] In a first aspect of this disclosure, a wireless communication method for random access in a sub-band full-duplex SBFD symbol / slot is provided, executed by a user equipment (UE), comprising: receiving configuration related to time-domain resources for transmitting a Physical Random Channel Access (PRACH) preamble in the SBFD symbol / slot; and performing transmission of the PRACH preamble in the SBFD symbol / slot; wherein the configuration related to the time-domain resources for transmitting the PRACH preamble in the SBFD symbol / slot includes: time-domain parameter configuration for transmitting the random access preamble in the SBFD symbol / slot provided by a higher layer, and / or a time-domain resource configuration table for transmitting the random access preamble provided by the higher layer.

[0005] In a second aspect of this disclosure, a wireless communication method for random access in a sub-band full-duplex SBFD symbol / slot is provided, executed by a user equipment (UE), comprising: performing a physical random channel access (PRACH) transmission in the RO based on a synchronization signal block SSB-to-RO mapping for a random access channel RACH timing RO in the SBFD symbol / slot.

[0006] In a third aspect of this disclosure, a wireless communication method for random access in a subband full-duplex SBFD symbol / slot is provided, executed by a user equipment (UE), comprising: performing physical random channel access (PRACH) transmission in a random access channel (RACH) based on at least one random access channel (RACH) timing RO verification rule to ensure the validity of the RO in the SBFD symbol / slot.

[0007] In a fourth aspect of this disclosure, a wireless communication method for random access in a subband full-duplex SBFD symbol / slot is provided, executed by a user equipment (UE), comprising: transmitting a Physical Random Channel Access (PRACH) preamble in the SBFD symbol / slot, wherein a Physical Uplink Control Channel (PUCCH) for carrying a Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) message is mapped to UL resources of the uplink UL subband in the SBFD symbol / slot.

[0008] In a fifth aspect of this disclosure, a wireless communication method for random access in a sub-band full-duplex SBFD symbol / slot is provided, executed by a base station, comprising: sending to a user equipment (UE) a configuration related to time-domain resources for transmitting a Physical Random Channel Access (PRACH) preamble in the SBFD symbol / slot; and requesting the UE to perform transmission of the PRACH preamble in the SBFD symbol / slot; wherein the configuration related to the time-domain resources for transmitting the PRACH preamble in the SBFD symbol / slot includes: time-domain parameter configuration for transmitting the random access preamble in the SBFD symbol / slot provided by a higher layer, and / or a time-domain resource configuration table for transmitting the random access preamble provided by the higher layer.

[0009] In a sixth aspect of this disclosure, a wireless communication method for random access in a sub-band full-duplex SBFD symbol / slot is provided, executed by a base station, comprising: requesting a user equipment (UE) to perform a physical random channel access (PRACH) transmission in the RO based on a synchronization signal block SSB-to-RO mapping for a random access channel RACH timing RO in the SBFD symbol / slot.

[0010] In a seventh aspect of this disclosure, a wireless communication method for random access in a sub-band full-duplex SBFD symbol / slot is provided, executed by a base station, comprising: requesting a user equipment (UE) to perform physical random channel access (PRACH) transmission in a RO based on at least one random access channel (RACH) timing RO verification rule to ensure the validity of the RO in the SBFD symbol / slot.

[0011] In an eighth aspect of this disclosure, a wireless communication method for random access in a subband full-duplex SBFD symbol / slot is provided, executed by a base station, comprising: requesting a user equipment (UE) to transmit a Physical Random Channel Access (PRACH) preamble in the SBFD symbol / slot, wherein a Physical Uplink Control Channel (PUCCH) for carrying a Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) message is mapped to UL resources of the uplink UL subband in the SBFD symbol / slot.

[0012] In a ninth aspect of this disclosure, a user equipment (UE) is provided, comprising a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to perform the methods described above.

[0013] In a tenth aspect of this disclosure, a base station is provided comprising a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to perform the methods described above.

[0014] In the eleventh aspect of this disclosure, a non-transitory machine-readable storage medium is provided, on which instructions are stored, which, when executed by a computer, cause the computer to perform the above-described method.

[0015] In a twelfth aspect of this disclosure, a chip is provided that includes a processor configured to invoke and run a computer program stored in a memory, such that a device on which the chip is mounted performs the methods described above.

[0016] In a thirteenth aspect of this disclosure, a computer-readable storage medium is provided, wherein a computer program is stored that causes a computer to perform the above-described methods.

[0017] In the fourteenth aspect of this disclosure, a computer program product is provided, comprising a computer program that causes a computer to perform the above-described methods.

[0018] In the fifteenth aspect of this disclosure, a computer program is provided that causes a computer to perform the above-described method. Attached Figure Description

[0019] To more clearly illustrate the embodiments or related technologies of this disclosure, the accompanying drawings involved in the embodiments are briefly described below. Obviously, the drawings are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram illustrating a time-domain resource example of the PRACH configuration index in the current specification.

[0021] Figure 2 This is a schematic diagram illustrating an example of a PUCCH-ResourceCommon public resource configured for initial / random access.

[0022] Figure 3 This is a schematic diagram illustrating an example of using PUCCH configured in Puch-ResourceCommon in SBFD symbols / slots (DUD subband mode).

[0023] Figure 4This is a schematic diagram illustrating an example of using PUCCH configured in Puch-ResourceCommon in SBFD symbols / slots (DU subband mode).

[0024] Figure 5 This is a block diagram illustrating communication between one or more user equipment (UE) and a base station in a communication network system according to embodiments of the present disclosure.

[0025] Figure 6A This is a flowchart illustrating a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the user equipment (UE) side according to an embodiment of this disclosure.

[0026] Figure 6B This is a flowchart illustrating a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the user equipment (UE) side according to an embodiment of this disclosure.

[0027] Figure 6C This is a flowchart illustrating a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the user equipment (UE) side according to an embodiment of this disclosure.

[0028] Figure 6D This is a flowchart illustrating a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the user equipment (UE) side according to an embodiment of this disclosure.

[0029] Figure 7A This is a flowchart illustrating a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the base station side, according to an embodiment of this disclosure.

[0030] Figure 7B This is a flowchart illustrating a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the base station side, according to an embodiment of this disclosure.

[0031] Figure 7C This is a flowchart illustrating a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the base station side, according to an embodiment of this disclosure.

[0032] Figure 7D This is a flowchart illustrating a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the base station side, according to an embodiment of this disclosure.

[0033] Figure 8 This is a schematic diagram illustrating an example of a time slot within a subframe with a 15kHz subcarrier spacing (SCS) according to an embodiment of this disclosure.

[0034] Figure 9 This is a schematic diagram illustrating an example of the number of time slots within a frame with a 30kHz subcarrier spacing (SCS) according to an embodiment of this disclosure.

[0035] Figure 10 This is a schematic diagram illustrating an example of a one-to-one mapping of ROs of SBFD symbols / slots to ROs of non-SBFD symbols / slots according to embodiments of this disclosure.

[0036] Figure 11 This is a schematic diagram illustrating an example of the PRB offset of the PUCCH common resource in the SBFD symbol / slot, representing a reference UL subband start PRB according to an embodiment of this disclosure.

[0037] Figure 12 This is a schematic diagram illustrating an example of the PRB offset of the PUCCH common resource in the SBFD symbol / slot of the reference initial UL bandwidth portion BWP according to an embodiment of this disclosure.

[0038] Figure 13 This is a block diagram of a wireless communication system according to an embodiment of the present disclosure. Detailed Implementation

[0039] The technical solutions, structural features, objectives, and effects of this disclosure are described in detail below with reference to the accompanying drawings. Specifically, the terminology used in the embodiments of this disclosure is only used to describe the purpose of a particular embodiment and is not intended to limit this disclosure.

[0040] The exponential growth in the number of diverse use cases and UEs in next-generation wireless communication systems has led to an explosive increase in data traffic, placing high demands on spectrum efficiency. To meet these requirements, TDD systems are widely deployed in commercial NR systems. TDD systems use a single spectrum (band) for downlink (DL) and uplink (UL) in different time slots, making more efficient use of available spectrum compared to frequency division duplex (FDD) systems.

[0041] In conventional TDD systems, time-domain resources are divided into downlink DL, uplink UL, and flexible time slots / symbols / time slots, where flexible time slots / symbols / time slots can be used as DL, UL, or as a guard interval for DL-UL handover. In conventional TDD, allocating a limited time length for the uplink leads to reduced coverage, increased latency, and reduced capacity. To address the limitations of conventional TDD operations, the 3GPP RAN Working Group approved a research project in Rel-18 [1] focusing on the feasibility of simultaneous DL and UL operations within the conventional TDD band, i.e., full-duplex, or more specifically, non-overlapping subband full-duplex operation. In SBFD operation, the gNB operates in full-duplex mode, i.e., simultaneous DL and UL transmissions occur only on the gNB side, while the UE operates in half-duplex mode. In Rel-18, a baseline for SBFD operation was established, and the following consensus was reached in TR 38.858: 1. SBFD on the gNB side. 2. Half-duplex operation on the UE side. 3. FR1 and FR2-1. 4. Existing TDD slot formats can be used to configure SBFD operation. For example, UL subbands can be configured in DL or flexible symbols / slots. 5. Semi-static cell common signaling, such as TDD-UL-DL-ConfigCommon and TDD-UL-DL-ConfigDedicated, can be used to indicate / configure the time and frequency location of SBFD operation to RRC connected UEs. 6. SBFD operation option 4, where the time and frequency location of the subband used for SBFD operation is known to SBFD-aware UEs. 7. Coexistence between non-SBFD-aware UEs (including legacy UEs) and SBFD-aware UEs in cells where SBFD operation is performed on the gNB side. 8. SBFD schemes within a single configured DL and UL BWP pair with aligned center frequencies. 9. A UL subband used for SBFD operation within SBFD symbols (excluding legacy UL symbols / slots) on a TDD carrier.

[0042] In addition, at RAN plenary session #102, a work item on NR duplex operation (subband full-duplex SBFD) [1] was approved. The goal of this work item is to standardize SBFD operation on the gNB side within a TDD carrier. One of the goals is to define SBFD operation for RRC connected UEs to enable random access in SBFD symbols / slots, while also studying the potential benefits of extending random access operation in SBFD symbols / slots to RRC idle and inactive UEs, specifically as follows: Standardize SBFD operation to support random access in SBFD symbols / slots for RRC connected UEs.

[0043] The main objectives of supporting RRC connected-mode UEs for random access in SBFD symbols / slots are: 1. To enhance cell coverage. 2. To enhance PRACH capacity by allowing more ROs. 3. To reduce random access latency by introducing more ROs.

[0044] The primary goals of random access in SBFD symbols / slots are to improve cell coverage, enhance PRACH capacity, and reduce initial / random access latency. However, random access in SBFD symbols / slots / slots / cycles may face the following problems.

[0045] Question 1: How to enhance the existing random access configuration table for unpaired spectrum? For random access, the UE is configured with a “PRACH configuration index” for preamble transmission via a higher layer. These indices indicate the preamble format sequence (e.g., long sequence and short sequence) and the time-domain resources used for preamble transmission. In the current specification, there are three tables (Tables 6.3.3.2-2 to 6.3.3.2-4 in TS 38.211) that define the PRACH configuration index and its time-domain resources based on frequency range (FR1 and FR2) and duplex type (unpaired spectrum, paired spectrum / supplementary uplink) [TS 38.211]. According to the specification, "Random access preambles can only be transmitted in the time-domain resources obtained from Tables 6.3.3.2-3 to 6.3.3.2-4, and depend on FR1 or FR2 and the spectrum type defined in [8, TS38.104]. The PRACH configuration indexes in Tables 6.3.3.2-3 to 6.3.3.2-4 are given by the higher-layer parameter prach-ConfigurationIndex for Table 6.3.3.2-3, or by msgA-PRACH-ConfigurationIndex if configured; for Tables 6.3.3.2-2 and 6.3.3.2-4, they are given by the higher-layer parameter prach-ConfigurationIndex, or by msgA-PRACH-ConfigurationIndex if configured."

[0046] The time-domain resources (subframe indices) in the existing specification tables [TS 38.211 Tables 6.3.3.2-2 to 6.3.3.2-4] are designed to align with uplink time slots in TDD-UL-DL mode. These tables were specifically created for PRACH configuration and transmission in FR1 / FR2 unpaired spectrum. However, when it comes to RRC connected UEs or RRC idle / inactive UEs performing SBFD random access operations on TDD carriers in unpaired spectrum, it is inappropriate to use the same tables for PRACH transmission in SBFD symbols / time slots (UL subbands). This is because SBFD symbols / time slots are configured in TDD D / F symbols / time slots, while the current tables are designed to place PRACH within UL symbols / time slots. An example of this situation is as follows: Figure 1 As shown, PRACH configuration indices 4 and 5 are used in conjunction with the common time slot mode DDDSUDDSUU. Therefore, a different method is needed to accurately allocate the time-domain resources for PRACH transmissions within SBFD symbols / time slots.

[0047] Question 2: SSB to RO mapping in SBFD symbols / slots: In NR, SSBs are associated with different beams, and the UE selects a beam and uses that beam to transmit PRACH. To allow the network to determine which beam the UE has selected, the current specification defines a mapping between SSBs and RACH timings (ROs). By detecting which RO the UE transmits PRACH on, the network can determine which SSB beam the UE has selected. The rules for SSB-to-RO mapping are defined in [TS38.213] as follows: "SS / PBCH block indices provided by ssb-PositionsInBurst in SIB1 or ServingCellConfigCommon are mapped to valid PRACH timings in the following order, where the parameters are described in [4, TS 38.211]: 1. First, in ascending order of the preamble index within a single PRACH timing. 2. Second, in ascending order of the frequency resource index of the frequency-multiplexed PRACH timing. 3. Third, in ascending order of the time-domain resource index of the time-multiplexed PRACH timing within a PRACH slot. 4. Fourth, in ascending order of the PRACH slot index."

[0048] This mapping between SSB and RACH timing is defined by the following two RRC parameters [TS 38.331] msg1-FDM and ssb-perRACH-OccasionAndCB-PreamblesPerSSB, and is configured to the UE via ssb-perRACH-OccasionAndCB-PreamblesPerSSB.

[0049] When RACH configurations are set separately for SBFD symbols / slots and non-SBFD symbols / slots, the number of msg1-FDMs in the SBFD symbol / slot is determined based on the bandwidth of the UL subband. Existing specifications define the mapping between ROs and SSBs for RACH configurations in SBFD symbols / slots. However, this mapping may affect the SSB-RO mapping for legacy UEs that do not support ROs configured in SBFD symbols / slots. Legacy UEs may not be aware of the specific mapping used for SBFD symbols / slots, which could lead to confusion. Furthermore, SBFD-aware UEs can utilize ROs configured in both SBFD symbols / slots (within the UL subband) and non-SBFD UL symbols / slots. Using the same RO-SSB mapping for both SBFD symbols / slots and non-SBFD symbols / slots could cause confusion for SBFD-aware UEs.

[0050] Question 3: RO verification in SBFD symbols / slots: If the RACH timing RO is configured over a long time period, the RO may overlap with the SSB, or, in the case of TDD-UL-DL configuration, the RO may overlap with the DL symbol / slot. To avoid this, the current specification defines several rules to specify which ROs are valid (which the UE can use to transmit msg1). Based on TS 38.311, the RO verification rules are as follows: For unpaired spectrum, if the UE is not provided with tdd-UL-DL-ConfigurationCommon, the PRACH timing in the PRACH slot is valid if it does not precede the SS / PBCH block in that PRACH slot and is received at least N symbols after the last SS / PBCH block. gap It begins with a symbol, where N gap Provided by Table 8.1-2 of TS 38.213, and if channelAccessMode="semiStatic" is provided, it does not overlap with a set of consecutive symbols preceding the start of the next channel occupancy time, where the UE does not transmit [15, TS 37.213]. The candidate SS / PBCH block index for the SS / PBCH block corresponds to the SS / PBCH block index provided by ssb-PositionsInBurst in SIB1 or ServingCellConfigCommon, as described in Clause 4.1. If the UE is provided with tdd-UL-DL-ConfigurationCommon, the PRACH timing in the PRACH slot is valid if it is within a UL symbol / slot, or if it does not precede the SS / PBCH block in that PRACH slot and is at least N after the last downlink symbol. gap It begins with a symbol and is at least N symbols after the last SS / PBCH block symbol.gap It begins with a symbol, where N gap Provided by Table 8.1-2 of TS 38.213, and if channelAccessMode="semiStatic" is provided, it does not overlap with a set of consecutive symbols preceding the start of the next channel occupancy time, during which no transmissions should occur, as described in [15, TS 37.213]. The candidate SS / PBCH block index for the SS / PBCH block corresponds to the SS / PBCH block index provided by ssb-PositionsInBurst in SIB1 or ServingCellConfigCommon, as described in Clause 4.1. For preamble format B4 [4, TS 38.211], N gap =0. N gap This is the time interval (in symbols) between RO and SSB or between RO and DL symbols. Its value is given in Table 8.1-2 of TS 38.213.

[0051] Table 8.1-2 of TS 38.213: N for different preambles SCS μ gap value:

[0052] Since the above rules are defined for ROs configured in traditional UL symbols / time slots, they may not apply to ROs configured in SBFD symbols / time slots. This is because the bandwidth and timing of the UL subbands differ from those of traditional UL symbols / time slots. Furthermore, the N mentioned in Table 8.1-2 of TS 38.213 in the current specification... gap The values ​​are designed according to the TDD-UL-DL slot format and may not be suitable for considering RO verification configured in SBFD symbols / slots.

[0053] Question 4: PUCCH carrying HARQ-ACK information for Msg4 / MsgB: During the initial access process, the HARQ-ACK information for Msg4 (4-step initial access) or MsgB (2-step initial access) is carried in the PUCCH using the UCI. According to specification 38.211, "If the UE does not have a dedicated PUCCH resource configuration (provided by PUCCH-ResourceSet in PUCCH-Config), a PUCCH resource set is provided via pucch-ResourceCommon, which is indexed to a row in Table 9.2.1-1 of TS 38.213, used for a PUCCH resource set of size..." The initial UL BWP of each PRB transmits HARQ-ACK information on the PUCCH. For operations in FR2-2, pucch-ResourceCommon can also provide N for the PUCCH resource set. RB The number of RBs; otherwise N RB =1.

[0054] In summary, before the UE is provided with dedicated PUCCH resource configuration, it utilizes one of the cell-specific PUCCH resource sets provided in the PUCCH-Common configuration (as shown in Table 1 [TS 38.213 Table 9.2.1-1]) to transmit HARQ-ACK information. The UE uses frequency hopping to transmit PUCCH at both edges of the UE's initial UL-BWP, where the frequency offset between the first and second hops is determined based on the BWP size, the PUCCH resource index, and the PRB offset from TS 38.213 Table 9.2.1-1 (TS 38.213), as follows: Figure 2 As shown.

[0055] Table 1: (TS 38.213 Table 9.2.1-1: PUCCH resource set before dedicated PUCCH resource configuration):

[0056] If the HARQ-ACK for Msg4 / MsgB is transmitted in an SBFD symbol / slot, and Table 1 of the existing specification (TS 38.213 Table 9.2.1-1: PUCCH resource set before dedicated PUCCH resource configuration) is used, then the PUCCH for the HARQ-ACK of Msg4 / MsgB will be located in a frequency resource outside the UL subband, such as... Figure 3 As shown. Similarly, if frequency hopping for PUCCH is enabled, the second hop of PUCCH may be located in frequency resources outside the UL subband, such as... Figure 3 (DUD sub-band mode) and Figure 4 As shown in (DU / UD sub-band mode).

[0057] At the 3GPP RAN1#116 meeting, several issues concerning random access for RRC-connected SBFD-aware UEs in SBFD symbols / slots were discussed, and the following agreement was reached:

[0058] In the existing technology, several issues regarding RO configuration, the validity of ROs in SBFD symbols / slots, and the transmission of Msg2, Msg3, and Msg4 in SBFD symbols / slots have been identified and agreed upon. However, there is currently no consensus on the applicability of the current specification rules and configurations to random access in SBFD symbols / slots. Further research is needed to address issues related to enhancing several physical layer parameters in the current specification for configuring ROs in SBFD symbols / slots, defining independent SSB-to-RO mappings for ROs in SBFD symbols / slots, and carrying Msg-B / Msg-4 HARQ-ACKs on PUCCHs located within UL subbands in SBFD symbols / slots.

[0059] Some embodiments of this disclosure propose SBFD operation in an idle / inactive UE to improve PRACH and Msg3 coverage, reduce initial / random access latency, and increase the flexibility of initial / random access by offloading random access from fixed UL time slots to SBFD symbols / time slots. The proposed solutions are summarized as follows: 1. Define the time-domain resources for the UE to transmit the PRACH preamble in the SBFD symbols / time slots. 2. Introduce a new table for the time-domain resources for the UE to transmit the PRACH preamble in the SBFD UL subband. 3. Introduce a new index in the current specification PRACH time-domain table to allocate time-domain resources for transmitting the PRACH preamble in the SBFD UL subband. 4. Introduce multiple SSB-to-RO mappings to distinguish between the existing SSB-to-RO mappings in the specification and the SSB-to-RO mappings of ROs configured in semi-persistent transmission symbols / time slots. 5. Introduce RO verification rules to ensure the validity of ROs in SBFD symbols / time slots. 6. Several solutions are proposed, focusing on placing the PUCCH and its frequency hopping within the UL subband bandwidth of the SBFD symbol / slot, which can be used to carry Msg4 / MsgB HARQ-ACK in random access.

[0060] Some embodiments of this disclosure discuss random access in SBFD symbols / slots and have the following advantages: 1. Enhanced cell coverage. 2. Enhanced PRACH capacity by allowing more ROs. 3. Reduced random access latency by introducing more ROs. 4. Improved PRACH and MSG3 coverage.

[0061] Figure 5This disclosure illustrates one or more user equipment (UE) 10s and a base station 20 (e.g., gNB) for communication in a communication network system 40 according to an embodiment of the present disclosure. The communication network system 40 includes one or more UEs 10s and a base station 20. UE 10s are configured to receive SBFD configuration from the base station 20 via a System Information Block (SIB). For example, by receiving the SBFD configuration from the base station in the SIB, wherein the SBFD configuration includes time-frequency resources for SBFD operations in TDD cycles, TDD DL, or flexible symbols / slots, at least one idle / inactive UE is configured to perform DL or UL transmissions based on the SBFD configuration. This can solve problems in the prior art and other issues. For example, this can improve Physical Random Channel Access (PRACH) and / or MSG3 coverage and / or reduce initial / random access latency. The one or more UEs 10s may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13. The base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23. The processor 11 or 21 may be configured to implement the suggested functions, processes, and / or methods described in this specification. A layer of the wireless interface protocol may be implemented in the processor 11 or 21. The memory 12 or 22 is operatively coupled to the processor 11 or 21 and stores various information to operate the processor 11 or 21. The transceiver 13 or 23 is operatively coupled to the processor 11 or 21, and the transceiver 13 or 23 transmits and / or receives radio signals.

[0062] In this disclosure, base station 20 can be an entity used to send or receive information, such as a gNB. Base station 20 can also be an eNodeB, a Transmitter-Receiver Point (TRP), a NodeB in next-generation communications, or an access point in Wi-Fi. UE 10 is an entity on the user side used to send or receive information, such as a mobile phone UE. UE 10 can also be referred to as a terminal, UE, mobile station, or mobile terminal. UE 10 can be a mobile phone, tablet, VR, AR, wireless terminal for industrial control, wireless terminal for autonomous driving, wireless terminal for remote medical surgery, wireless terminal for smart grids, wireless terminal for transportation safety, wireless terminal for smart cities, wireless terminal for smart homes, etc. Furthermore, terminals and base stations can be deployed on land, including indoors, outdoors, handheld, and vehicle-mounted, or on water, in the air, on airplanes, drones, or on satellites.

[0063] Figures 6A to 6D This disclosure illustrates a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the user equipment (UE) side, according to some embodiments of the present disclosure. Figures 7A to 7DThis disclosure illustrates a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the base station side, according to some embodiments of the present disclosure.

[0064] Figure 6A This disclosure illustrates a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to a user equipment (UE) side, according to an embodiment of the present disclosure. The wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, applied to the UE side, includes: operation 601A, receiving configuration related to time-domain resources for transmitting a Physical Random Channel Access (PRACH) preamble in the SBFD symbols / slots; and operation 602A, performing transmission of the PRACH preamble in the SBFD symbols / slots; wherein the configuration related to the time-domain resources for transmitting the PRACH preamble in the SBFD symbols / slots includes: time-domain parameter configuration provided by a higher layer for transmitting the random access preamble in the SBFD symbols / slots, and / or a time-domain resource configuration table provided by the higher layer for transmitting the random access preamble. The processor 11 is also configured to execute the wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the UE side in some of the following embodiments.

[0065] In some embodiments, the UE is provided with explicit configuration of time-domain parameters for transmitting random access preambles in the SBFD symbols / slots. This explicit configuration includes at least one of the following parameters: a preamble format for random access in the SBFD symbols / slots; a frame number / subframe number containing an SBFD operation or the SBFD symbol / slot; a start symbol within the slot, configured based on the start duration of the SBFD operation within the slot; the number of PRACH slots within the subframe, depending on the number or duration of the SBFD operation within the subframe, and configured based on the SBFD period in the time domain; the number of time-domain PRACH opportunities within the PRACH slots; and the PRACH duration. Specifically, in some examples, there are two different approaches. The first approach includes explicit configuration of the time-domain parameters. This approach does not use tables. The second approach includes configuration of PRACH configuration indexes, where each index is associated with a specific row in a table containing time-domain parameters as described in some embodiments.

[0066] In some embodiments, in the time-domain resource configuration table for the random access preamble transmission, the PRACH configuration index is associated with a subframe in a time-division duplex (TDD) mode containing the SBFD symbols / slots. In some embodiments, in the time-domain resource configuration table for the random access preamble transmission, each PRACH configuration index is associated with a time-domain resource. In some embodiments, each PRACH configuration index is associated with the preamble format, frame number / subframe number, start symbol within a slot, number of PRACH slots within a subframe, number of time-domain PRACH events within a PRACH slot, and PRACH duration.

[0067] In some embodiments, the time-domain resource configuration table for the random access preamble transmission includes PRACH configuration indices 0-262 for the time-domain resources used to transmit the PRACH preamble in the SBFD symbols / time slots. In some embodiments, the time-domain resource configuration table for the random access preamble transmission includes PRACH configuration indices 262-524 for the time-domain resources used to transmit the PRACH preamble in the SBFD symbols / time slots.

[0068] Figure 6B This disclosure illustrates a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the user equipment (UE) side, according to an embodiment of the present disclosure. The wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, applied to the UE side, includes: operation 601B, performing a physical random channel access (PRACH) transmission in the RO based on a synchronization signal block SSB-to-RO mapping for a random access channel RACH timing RO in the SBFD symbol / slot. The processor 11 is also configured to perform the wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the UE side in some of the embodiments described below.

[0069] In some embodiments, the SSB-to-RO mapping for ROs in the SBFD symbol / slot reuses existing specification rules, and independent SSB-to-RO mappings are defined for ROs configured in the SBFD symbol / slot and non-SBFD symbol / slot. In some embodiments, ROs in the SBFD symbol / slot are grouped with ROs in the non-SBFD symbol / slot, and the RO group is mapped to the SSB. In some embodiments, ROs in the SBFD symbol / slot are grouped with at least one RO in the non-SBFD symbol / slot based on ascending order of RO indexes. In some embodiments, ROs in the SBFD symbol / slot are grouped with at least one RO in the non-SBFD symbol / slot based on ROs that are frequency division multiplexed (FDMed) within a time instance. In some embodiments, ROs in the SBFD symbol / slot are mapped to at least one RO in the non-SBFD symbol / slot. In some embodiments, ROs in the SBFD symbol / slot are mapped to the at least one RO in the non-SBFD symbol / slot in a one-to-one, one-to-many, many-to-one, or many-to-many manner.

[0070] Figure 6C This disclosure illustrates a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the user equipment (UE) side, according to embodiments of the present disclosure. This wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, applied to the UE side, includes: operation 601C, performing a Physical Random Channel Access (PRACH) transmission in the RO based on at least one random access channel RACH timing RO verification rule to ensure the validity of the RO in the SBFD symbol / slot. The processor 11 is also configured to execute the wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the UE side in some of the embodiments described below.

[0071] In some embodiments, the at least one RO verification rule includes at least one of the following rules: ROs configured within the bandwidth of the uplink UL subband are valid; for ROs crossing the boundary between the SBFD symbol / slot and non-SBFD symbol / slot, these ROs are considered valid when configured within the bandwidth of the UL subband; for ROs crossing the boundary between the SBFD symbol / slot and non-SBFD symbol / slot, these ROs are considered invalid when their bandwidth exceeds the limit of the UL subband; for ROs within the SBFD symbol / slot and within the UL subband, if these ROs overlap with the Synchronization Signal Block (SSB), they are not considered valid ROs; for ROs in the SBFD symbol / slot, if the RO does not precede the Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block in the PRACH slot, and is at least N N after the last non-SBFD downlink symbol.gap It begins with a symbol and is at least N symbols after the last SS / PBCH block symbol. gap The RO is valid when it begins with a symbol. In some examples, N gap This is the time interval (in symbols) between RO and SSB or between RO and DL symbols. Its value is given in Table 8.1-2 of TS 38.213.

[0072] Figure 6D This disclosure illustrates a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the user equipment (UE) side, according to an embodiment of the present disclosure. The wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, applied to the UE side, includes: operation 601D, performing the transmission of a Physical Random Channel Access (PRACH) preamble in the SBFD symbols / slots, wherein the Physical Uplink Control Channel (PUCCH) for carrying a Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) message is mapped to the UL resources of the uplink UL sub-band in the SBFD symbols / slots. The processor 11 is also configured to perform the wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the UE side in some of the embodiments described below.

[0073] In some embodiments, the message is Msg4 or MsgB. In some embodiments, cell-specific PUCCHs for SBFD symbols / slots are configured to the UE via higher-layer signaling, and the higher-layer signaling indicates indices in a table, wherein each index is associated with the PUCCH format, first symbol, number of symbols, PRB offset, and initial CS index set. In some examples, the higher-layer signaling is separate signaling for configuring cell-specific PUCCH resources for SBFD symbols. In some embodiments, the physical resource block PRB offset of the cell-specific / public PUCCH resource set provided by the higher layers is defined based on the bandwidth of the UL subband.

[0074] In some embodiments, the PRB offset of the cell-specific / public PUCCH resource set is located within the bandwidth of the UL subband, and the PRB offset set (RB offset UL subband) includes [0, 3, 2, 4, (UL subband size) / 4]. In some embodiments, the PRB offset is defined based on the bandwidth of the initial UL bandwidth portion BWP corresponding to the UL subband. In some embodiments, the PUCCH resource is located within the bandwidth of the UL subband, and for downlink, uplink, and downlink DUD SBFD subband modes, the PRB offset set includes: {(BWP size) / 3, (BWP size) / 3+3, (BWP size) / 3+2, (BWP size) / 3+4, (BWP size) / 2}. In some embodiments, the PUCCH resource is located within the bandwidth of the UL subband, and for downlink, uplink DU or uplink, downlink UD SBFD subband modes, the PRB offset set includes: {(BWP size) / 2, (BWP size) / 2+3, (BWP size) / 2+2, (BWP size) / 2+4, (BWP size) / 2}. In some embodiments, the starting point of the PUCCH is configured by higher layers. In some embodiments, a first intra-slot frequency hopping is enabled for the PUCCH located within cell-specific / common resources in the SBFD symbol / slot, and independent intra-slot frequency hopping is configured for the PUCCH located within cell-specific / common resources in the SBFD symbol / slot by higher layers.

[0075] Figure 7A This disclosure illustrates a wireless communication method for random access in sub-band full-duplex SBFD symbols / time slots applied to a base station side, according to embodiments of the present disclosure. The wireless communication method for random access in sub-band full-duplex SBFD symbols / time slots, applied to the base station side, includes: operation 701A, sending a configuration related to time-domain resources for transmitting a Physical Random Channel Access (PRACH) preamble in the SBFD symbols / time slots to a User Equipment (UE); and operation 702A, requesting the UE to perform transmission of the PRACH preamble in the SBFD symbols / time slots; wherein the configuration related to the time-domain resources for transmitting the PRACH preamble in the SBFD symbols / time slots includes: time-domain parameter configuration for transmitting the random access preamble in the SBFD symbols / time slots provided by a higher layer, and / or a time-domain resource configuration table for transmitting the random access preamble provided by the higher layer. The processor 21 is also configured to execute the wireless communication method for random access in sub-band full-duplex SBFD symbols / time slots applied to the base station side in some of the following embodiments.

[0076] In some embodiments, the UE is provided with an explicit configuration of time-domain parameters for transmitting random access preambles in the SBFD symbols / slots. The explicit configuration includes at least one of the following parameters: a preamble format for random access in the SBFD symbols / slots; a frame number / subframe number containing an SBFD operation or the SBFD symbol / slot; a start symbol within the slot, configured according to the start duration of the SBFD operation within the slot; the number of PRACH slots within the subframe, the number of PRACH slots depending on the number or duration of the SBFD operation within the subframe, and configured according to the SBFD period in the time domain; the number of time-domain PRACH opportunities within the PRACH slots; and the PRACH duration.

[0077] In some embodiments, in the time-domain resource configuration table for the random access preamble transmission, the PRACH configuration index is associated with a subframe in a time-division duplex (TDD) mode containing the SBFD symbols / slots. In some embodiments, in the time-domain resource configuration table for the random access preamble transmission, each PRACH configuration index is associated with a time-domain resource. In some embodiments, each PRACH configuration index is associated with the preamble format, frame number / subframe number, start symbol within a slot, number of PRACH slots within a subframe, number of time-domain PRACH events within a PRACH slot, and PRACH duration.

[0078] In some embodiments, the time-domain resource configuration table for the random access preamble transmission includes PRACH configuration indices 0-262 for the time-domain resources used to transmit the PRACH preamble in the SBFD symbols / time slots. In some embodiments, the time-domain resource configuration table for the random access preamble transmission includes PRACH configuration indices 262-524 for the time-domain resources used to transmit the PRACH preamble in the SBFD symbols / time slots.

[0079] Figure 7BThis disclosure illustrates a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to a base station side. The wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, applied to the base station side, includes: operation 701B, requesting a user equipment (UE) to perform a physical random channel access (PRACH) transmission in the RO based on a synchronization signal block SSB-to-RO mapping for a random access channel (RACH) timing RO in the SBFD symbol / slot. The processor 21 is also configured to perform the wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the base station side in some of the embodiments described below.

[0080] In some embodiments, the SSB-to-RO mapping for ROs in the SBFD symbol / slot reuses existing specification rules, and independent SSB-to-RO mappings are defined for ROs configured in the SBFD symbol / slot and non-SBFD symbol / slot. In some embodiments, ROs in the SBFD symbol / slot are grouped with ROs in the non-SBFD symbol / slot, and the RO group is mapped to the SSB. In some embodiments, ROs in the SBFD symbol / slot are grouped with at least one RO in the non-SBFD symbol / slot based on ascending order of the RO index.

[0081] In some embodiments, the ROs in the SBFD symbols / slots are grouped with at least one RO in the non-SBFD symbols / slots based on the ROs in frequency division multiplexing (FDMed) within a time instance. In some embodiments, the ROs in the SBFD symbols / slots are mapped to at least one RO in the non-SBFD symbols / slots. In some embodiments, the ROs in the SBFD symbols / slots are mapped to the at least one RO in the non-SBFD symbols / slots in a one-to-one, one-to-many, many-to-one, or many-to-many manner.

[0082] Figure 7C This disclosure illustrates a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to a base station side. The wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, applied to the base station side, includes: operation 701C, requesting a user equipment (UE) to perform physical random channel access (PRACH) transmission in a RO based on at least one random access channel (RACH) timing RO verification rule, to ensure the validity of the RO in the SBFD symbol / slot. The processor 21 is also configured to perform the wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the base station side in some of the following embodiments.

[0083] In some embodiments, the at least one RO verification rule includes at least one of the following rules: ROs configured within the bandwidth of the uplink UL subband are valid; for ROs crossing the boundary between the SBFD symbol / slot and non-SBFD symbol / slot, these ROs are considered valid when configured within the bandwidth of the UL subband; for ROs crossing the boundary between the SBFD symbol / slot and non-SBFD symbol / slot, these ROs are considered invalid when their bandwidth exceeds the limit of the UL subband; for ROs within the SBFD symbol / slot and within the UL subband, if these ROs overlap with the Synchronization Signal Block (SSB), they are not considered valid ROs; for ROs in the SBFD symbol / slot, if the RO does not precede the Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block in the PRACH slot, and is at least N N after the last non-SBFD downlink symbol. gap It begins with a symbol and is at least N symbols after the last SS / PBCH block symbol. gap The RO is valid when the symbol is first used.

[0084] Figure 7D This disclosure illustrates a wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to a base station side. The wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, applied to the base station side, includes: operation 701D, requesting a user equipment (UE) to perform the transmission of a Physical Random Channel Access (PRACH) preamble in an SBFD symbol / slot, wherein the Physical Uplink Control Channel (PUCCH) for carrying a Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) message is mapped to the UL resources of the uplink UL sub-band in the SBFD symbol / slot. The processor 21 is also configured to execute the wireless communication method for random access in sub-band full-duplex SBFD symbols / slots applied to the base station side in some of the following embodiments.

[0085] In some embodiments, the message is Msg4 or MsgB. In some embodiments, the cell-specific PUCCH for SBFD symbols / slots is configured to the UE via higher-layer signaling, and the higher-layer signaling indicates an index in a table, wherein each index is associated with the PUCCH format, the first symbol, the number of symbols, the PRB offset, and the initial CS index set. In some embodiments, the physical resource block PRB offset of the cell-specific / public PUCCH resource set provided by the higher layers is defined based on the bandwidth of the UL subband.

[0086] In some embodiments, the PRB offset of the cell-specific / public PUCCH resource set is located within the bandwidth of the UL subband, and the PRB offset set (RB offset UL subband) includes [0, 3, 2, 4, (UL subband size) / 4]. In some embodiments, the PRB offset is defined based on the bandwidth of the initial UL bandwidth portion BWP corresponding to the UL subband. In some embodiments, the PUCCH resource is located within the bandwidth of the UL subband, and for downlink, uplink, and downlink DUD SBFD subband modes, the PRB offset set includes: {(BWP size) / 3, (BWP size) / 3+3, (BWP size) / 3+2, (BWP size) / 3+4, (BWP size) / 2}. In some embodiments, the PUCCH resource is located within the bandwidth of the UL subband, and for downlink, uplink DU or uplink, downlink UD SBFD subband modes, the PRB offset set includes: {(BWP size) / 2, (BWP size) / 2+3, (BWP size) / 2+2, (BWP size) / 2+4, (BWP size) / 2}. In some embodiments, the starting point of the PUCCH is configured by higher layers. In some embodiments, a first intra-slot frequency hopping is enabled for the PUCCH located within cell-specific / common resources in the SBFD symbol / slot, and independent intra-slot frequency hopping is configured for the PUCCH located within cell-specific / common resources in the SBFD symbol / slot by higher layers.

[0087] Some embodiments of this disclosure focus on random access for RRC connected UEs during the subband full-duplex SBFD time length. The goal is to provide the UE with more opportunities to transmit PRACH UL during the SBFD time length, thereby reducing latency associated with initial / random access. Furthermore, the solutions outlined below can also be applied to random access for RRC idle / inactive UEs during the SBFD time length.

[0088] Example 1: Time-domain resources for transmitting random access preambles in SBFD symbols / slots: Some embodiments of this disclosure provide time-domain resources for transmitting random access preambles in SBFD symbols / slots. In other words, this embodiment of the disclosure proposes enhancements to the current specification's time-domain resources to make them suitable for transmitting random access preambles in SBFD symbols / slots. The following enhancements can be made.

[0089] 1. Explicit configuration of time-domain parameters for random access preamble transmission: In this embodiment, the time-domain resources for the UE to transmit random access preambles in SBFD symbols / slots are proposed to be explicitly configured to the UE via higher-layer signaling. This means that the UE is not limited to using the time-domain resources for random access preamble transmission defined in the existing specification TS 38.211 [Tables 6.3.3.2-3 to 6.3.3.2-4].

[0090] Therefore, the following time-domain parameters (1)-(6) can be configured to the UE by the higher layer for random access preamble transmission in SBFD symbols / slots: (1) Preamble format: Since there is no new preamble format for random access in SBFD symbols / slots, the existing specification format can be used.

[0091] (2) Frame number / subframe number: This parameter is limited to those frames / subframe numbers that contain SBFD operations or SBFD symbols / slots.

[0092] (3) Start symbol in time slot: This parameter can be configured according to the start duration of the SBFD operation in the time slot.

[0093] (4) Number of PRACH slots in a subframe: This parameter depends on the number or duration of SBFD operations in the subframe and can be configured according to the SBFD period in the time domain.

[0094] (5) Number of time-domain PRACH opportunities within a PRACH time slot.

[0095] (6) PRACH duration (in symbols / slots).

[0096] Explicit configuration of time-domain resources used for transmitting random access preambles is not limited to the PRACH configuration index of existing specifications. Instead, it can be explicitly configured based on the duration of SBFD symbols / slots within TDD. This approach effectively addresses the problem defined in the problem section. However, this approach may increase higher-layer signaling overhead.

[0097] 2. A new table for time-domain resource allocation for random access preamble transmission: In this embodiment, this disclosure proposes that random access preambles be transmitted in SBFD symbols / slots using time-domain resources obtained from Table 2 or Table 3, which are configured via the higher-level parameter prach-configurationIndex-V19 (a new configuration in PRACH-ConfigGeneric). By using this method, the PRACH configuration index is associated with those subframes containing SBFD symbols / slots in TDD mode. This allows for greater flexibility in allocating time-domain resources for random access preamble transmission in SBFD symbols / slots.

[0098] The time-domain resources used for transmitting random access preambles in SBFD symbols / slots are affected by the slot pattern and subcarrier spacing. For example, in... Figure 8 In the DDDSUDU time-slot mode commonly used in a 10ms radio frame with a 15kHz SCS, the subframes that can be configured for SBFD symbols / slots are subframes {0, 1, 2, 5, 6}. Therefore, the PRACH configuration index should correspond to those subframes that can contain SBFD symbols / slots to ensure the correct allocation of time-domain resources.

[0099] Furthermore, in the case of 30kHz SCS and slotted mode DDDSUDDSUU, the subframes that can be configured for SBFD operation are subframes {#0, #1, #2, #3, #5, #6, #7, #8}, such as Figure 9 As shown. These subframes can be viewed as time-domain resources in Tables 3 and 4, indicating the possible time slots in which the UE can transmit the random access preamble in SBFD symbols / time slots.

[0100] To define the time-domain resource table for the random access preamble associated with SBFD symbols / slots (i.e., in the UL subband), this embodiment proposes the following two options: Option 1: Define a new table where each PRACH configuration index is associated with a temporal resource, such as preamble format, frame / subframe number, start symbol / slot, number of PRACH slots within a subframe, number of temporal PRACH events within a PRACH slot, and PRACH duration.

[0101] For example, for the PRACH configuration index of FR1 and unpaired spectrum for random access in SBFD symbols / slots, a long PRACH sequence based on format 0 can be defined in Table 2. This table will provide the UE with the necessary information to correctly allocate and transmit random access preambles in SBFD symbols / slots using the specified time-domain resources.

[0102] Table 2: Random access configurations for FR1 and unpaired spectrum during SBFD duration:

[0103] High-level instructions for configuring time-domain resources in PRACH: When defining a new table for a new PRACH configuration index, the new PRACH configuration index can be configured in RACH configGeneric to indicate the associated PRACH configuration index to SBFD-aware UEs. Here is a configuration example:

[0104] Option 2: This option proposes including a new PRACH configuration index in the current specification table, which targets the time-domain resources for PRACH preamble transmission in SBFD symbols / slots (i.e., in UL subbands). An example of this option is shown in Table 3.

[0105] Table 3: Random access configurations for FR1 and unpaired spectrum during SBFD duration:

[0106] High-level signaling: If a new PRACH configuration has been defined and included in the current table, a new PRACH configuration index can be configured in RACHconfigGeneric to indicate the associated PRACH configuration index to the UE. A configuration example is shown below:

[0107] Example 2: SSB to RO mapping of RO in SBFD symbols / slots: During initial access, when a UE transmits PRACH in a configured RO, the network is unaware of which beam the UE is using for transmission. To allow the network to determine which beam the UE has selected, the current specification defines a specific mapping between SSB and RACH timing ROs. By detecting which RO the UE used to transmit PRACH, the network can understand the SSB beam selected by the UE. However, the current SSB-to-RO mapping is based on ROs configured in UL symbols / slots, meaning that this mapping may not be available when the RO is configured in SBFD symbols / slots. To address these issues, this embodiment proposes the following solution: SSB to RO mapping is performed for SBFD symbols / slots by reusing current legacy rules (for reference): This embodiment of the disclosure proposes reusing existing specification rules to define SSB-RO mappings for ROs configured in SBFD symbols / slots. This results in two SSB-RO mappings: one associated with the SSB-RO mapping in the SBFD symbol / slot, and another associated with the SSB-RO mapping in non-SBFD symbols / slots (ROs in conventional UL symbols). In this embodiment, we assume that independent ROs are configured in both SBFD symbols / slots and non-SBFD symbols / slots.

[0108] Group ROs of SBFD and non-SBFD symbols / slots and map them to SSBs according to the current rules: In this embodiment of the present disclosure, ROs configured in SBFD symbols / slots can be grouped with ROs configured in non-SBFD symbols / slots, and existing specification rules can be reused to map SSB to RO group mappings. ROs can be grouped in the following ways: (1) RO group based on RO index: ROs in SBFD symbols / slots are grouped together with ROs in non-SBFD symbols / slots based on ascending RO index. These RO groups are then mapped to each SSB in the SSB burst based on ascending order. For example, four ROs configured in SBFD symbols / slots are grouped together with four ROs configured in non-SBFD symbols / slots, and the RO groups are mapped to SSBs, as shown in Table 4.

[0109] Table 4: Index-based mapping of SBFD RO and non-SBFD RO groups to SSB:

[0110] Typically, the number of Returning Objects (ROs) configured in an SBFD symbol / slot may be less than the number configured in a non-SBFD symbol / slot. In cases where the number of ROs configured in an SBFD symbol / slot is less than the number configured in a non-SBFD symbol / slot, multiple ROs in an SBFD symbol / slot can be grouped together with one RO in a non-SBFD symbol / slot based on an ascending index. These RO groups can then be mapped to SSB groups according to existing specifications. Examples are shown in Table 5.

[0111] Table 5: Mapping of multiple SSB RO groups to a non-SBFD RO to SSB based on an index:

[0112] (2) RO groups based on the number of ROs in FDMed within a time instance: ROs in SBFD symbols / slots are grouped based on whether they are FDMed ROs within a time instance or not. In the current specification, msg1-FDM can select {1, 2, 4, 8} ROs in a time instance. For example, if there are 2 FDMed ROs in an SBFD symbol / slot and 4 FDMed ROs in a non-SBFD symbol / slot, they can be grouped together and mapped to an SSB, as shown in Table 6.

[0113] Table 6: RO groups and their mapping to SSB for FDMed ROs in SBFD and non-SBFD symbols / slots:

[0114] SBFD RO mapping to non-SBFD RO: In this embodiment, an RO configured in an SBFD symbol / time slot can be mapped to an RO configured in a non-SBFD symbol / time slot (traditional UL symbol / time slot). Since an RO configured in a traditional UL symbol / time slot can be mapped to an SSB according to existing specifications, an RO in an SBFD symbol / time slot mapped to an RO in a non-SBFD symbol / time slot can be assumed to be mapped to a similar RO-to-SSB mapping.

[0115] For example, consider four ROs configured in an SBFD symbol / slot and four ROs configured in a non-SBFD symbol / slot. Each RO in an SBFD symbol can be mapped to each RO in a non-SBFD mapping (e.g., a one-to-one mapping), such as... Figure 10 As shown. Thus, the SSB mapped to the RO in a non-SBFD symbol (traditional UL symbol) can be considered for the RO in the SBFD symbol, such as... Figure 10 As shown.

[0116] In some embodiments, the mapping of ROs in SBFD symbols / slots to ROs in non-SBFD symbols / slots can be performed without specifying the number of ROs associated with their index or time instance within the FDMed. This means that the mapping can be one-to-one, one-to-many, many-to-one, or many-to-many, without being constrained by index-based or FDM-based mapping.

[0117] It is worth noting that when an RO in a non-SBFD symbol / slot (traditional UL symbol) is used by both SBFD-aware UEs and traditional UEs, that RO is mapped to an SSB according to existing specifications. For both SBFD-aware UEs and traditional UEs, the same SSB-to-RO mapping can be considered.

[0118] Example 3: RO Validation Rules: This disclosure proposes the following verification rules for RO configurations in SBFD symbols / slots: 1. ROs configured within the bandwidth of the UL subband are valid. 2. For ROs crossing SBFD and non-SBFD symbol / slot boundaries, they are considered valid if they are within the bandwidth of the UL subband. 3. For ROs crossing SBFD and non-SBFD symbol / slot boundaries, they are considered invalid if their bandwidth exceeds the UL subband limit. 4. For ROs within SBFD symbols / slots and within the UL subband, they are not considered valid ROs if they overlap with SSBs. 5. For ROs in SBFD symbols / slots, they are considered valid if the RO does not precede the SS / PBCH block in the PRACH slot and is at least N N after the last non-SBFD downlink symbol. gap It begins with a symbol and is at least N symbols after the last SS / PBCH block symbol. gapThe RO is valid when a symbol is first used. For N gap The values ​​can be the existing specification values ​​given in Table 8.1-2 of TS38.213.

[0119] Example 4: PUCCH carrying HARQ-ACK for MsgB / Msg4 in SBFD symbols / slots: To address the issues associated with HARQ-ACK for transmitting Msg4 / MsgB in SBFD symbols / slots, this part of the disclosure proposes a solution in which the PUCCH can be contained in the UL resources of the UL subband: the PUCCH used to carry HARQ-ACK for Msg4 / MsgB can be mapped to the UL resources of the UL subband.

[0120] Note: The UE is not provided with dedicated PUCCH resource configuration, but instead uses one of the cell-specific PUCCH resource sets provided in PUCCH-ResourceCommon.

[0121] Refer to UL sub-bands to define the frequency resources for cell-specific / public PUCCH: This embodiment of the disclosure proposes defining the frequency resources of a cell-specific / public PUCCH based on the bandwidth and frequency location of the UL subband, which can be used by the UE during initial access in SBFD symbols / slots to carry HARQ-ACK for Msg4 / MsgB. To specify the cell-specific / public resources of the PUCCH in SBFD symbols / slots, a new table can be introduced to indicate the frequency resources within the UL subband. This embodiment proposes the following two options: Option 1: The RB offset of the cell-specific / public PUCCH resource set is defined based on the bandwidth of the UL subband, such as... Figure 11 As shown. In other words, the starting point of the RB offset is the starting RB of the UL subband in the D / F symbol / slot. By doing so, when the UE in the SBFD symbol / slot uses the cell-specific / public PUCCH to transmit the HARQ-ACK for Msg4 / MsgB, the PUCCH will be within the bandwidth of the UL subband.

[0122] Table 7 shows the proposed PRB offset, which is within the UL subband bandwidth and is used for cell-specific / public PUCCH resources during initial access.

[0123] Table 7: PRB Offset of PUCCH Common Resources in UL Subbands within Reference SBFD Symbols / Slots:

[0124] Higher-layer signaling instructing the UE on cell-specific / public PUCCH resources: In addition to the defined RB offset start point and a new table of cell-specific / common PUCCH resource sets for transmitting Msg4 / MsgB HARQ-ACK in SBFD symbols / slots, this disclosure proposes that this new table can be configured to SBFD-aware UEs via higher-layer signaling (i.e., PUCCH-ConfigCommon). This configuration is crucial for distinguishing between cell-specific / common PUCCH resources for SBFD-aware UEs and legacy UEs during initial access. This PUCCH cell-specific / common configuration will include indications of PUCCH cell-specific / common resources specifically for SBFD-aware UEs. The UE can be informed of the specific PUCCH resources used for SBFD symbols / slots during initial access to ensure HARQ-ACK transmission is within the UL subband.

[0125]

[0126] explain: pucch-ResourceCommonSBFD: This field in the higher layer indicates the index of 16 rows in the table, where each row configures a set of cell-specific / public PUCCH resources / parameters for the UE in the SBFD symbol / slot. The UE uses these PUCCH resources on the UL subband located in the initial DL BWP during initial access. When the network provides a dedicated PUCCH-Configuration for this SBFD symbol / slot, the SBFD-aware UE applies this dedicated configuration, instead of the configuration provided in the table for SBFD-aware UEs.

[0127] Option 2: The RB offset is defined based on the bandwidth of the initial UL BWP corresponding to the UL subband. In this embodiment, a set of RB offsets for cell-specific / public PUCCH resources is defined based on the bandwidth of the initial UL BWP so that the PUCCH resources are within the bandwidth of the UL subband, such as... Figure 12 As shown.

[0128] During initial access, the new RB offset values ​​used for PUCCH in cell-specific / public resources and located within the UL subband bandwidth are shown in Table 8. These are defined based on the initial UL bandwidth for DUD subband mode, as shown in Table 8; and for DU subband mode, as shown in Table 9.

[0129] Table 8: PRB Offset of PUCCH Common Resources in UL Subbands in Reference SBFD Symbols / Slots (DUD Subband Mode):

[0130] Table 9: PRB Offset of PUCCH Common Resources in UL Subbands (DU Subband Mode) in Reference SBFD Symbols / Slots:

[0131] Higher-layer signaling instructing the UE on cell-specific / public PUCCH resources: In this scenario, the index for the cell-specific / public PUCCH used to transmit HARQ-ACK in SBFD symbols / slots can be the same as for a traditional UE. However, an additional RB offset can be configured for the cell-specific / public PUCCH resources for an SBFD-aware UE to ensure that the PUCCH cell-specific / public resources are within the bandwidth of the UL subband. The new RB offset for cell-specific / public PUCCH resources is configured for an SBFD-aware UE as follows:

[0132] explain: SBFD_PRBOffset: This parameter indicates the PRB offset of the cell-specific / public PUCCH associated with the initial UL BWP, so that the PUCCH is located within the SBFD UL subband. The values ​​{n1, n2, n3, n4, n5, n6, n7, n8, n9, n10, n11, n12, n13, n14} correspond to the PUCCH locations as shown in Table 10.

[0133] Table 10: PRB offset values ​​for SBFD symbols / slots in PUCCH resource common areas:

[0134] The explicit start point of PUCCH in PUCCH configCommon: This embodiment of the disclosure proposes configuring an explicit start point for the PUCCH used to carry Msg4 / MsgB HARQ-ACK in SBFD symbols / slots. The gNB can configure this PUCCH start point in PUCCH-configCommon. Thus, the PUCCH used by an SBFD-aware UE to transmit Msg4 / MsgB HARQ-ACK during initial access will be located within the bandwidth of the UL subband. An example of an explicit PUCCH start point is shown below. When the PUCCH start point is explicitly configured by higher layers, the PRB offset defined in existing specifications can be used for the PUCCH in common resources during random access.

[0135] An example of an explicit starting point for PUCCH is shown below:

[0136] In-slot frequency hopping of PUCCH in cell-specific / public resources within SBFD symbols / slots: During initial access, if intra-slot frequency hopping is enabled for the PUCCH in the cell-specific / common resources for Msg4 / MsgB HARQ-ACK in the SBFD symbol, the second hop of the PUCCH will be outside the bandwidth of the UL BWP, as explained in detail in the Problems section. To keep the second hop of the PUCCH within the frequency resources of the UL subband in the SBFD symbol / slot, this embodiment of the disclosure proposes configuring independent intra-slot frequency hopping for the cell-specific / common PUCCH in the SBFD symbol / slot in PUCCH-configCommon, as shown in the following example:

[0137] In summary, some embodiments of this disclosure propose SBFD operation in an idle / inactive UE 10 to improve PRACH and / or MSG3 coverage, reduce initial / random access delay, and / or increase initial / random access flexibility by offloading random access from fixed UL time slots to SBFD symbols / time slots. The proposed solutions are summarized as follows: 1. Several rules are proposed to avoid overlap between PO and SBFD symbols / time slots. Furthermore, dynamic conversion from SBFD symbols / time slots to traditional symbols / time slots and flexible subbands are used to address the overlap between paging and SBFD symbols / time slots. 2. New limits on the maximum number of FDMed ROs and a new offset of the minimum RO relative to PRB#0 are proposed in the frequency domain to place MSG1 within the UL subband. Additionally, independent RO configuration parameters, such as independent frequency resources, offsets, and UL power control parameters, are proposed for ROs in SBFD symbols / time slots in SIB1. 3. SBFD modes and flexible subbands in the time domain are proposed to allow timely transmission of MSG2. 4. New frequency hopping ranges and / or independent parameters in the RAR UL license can be proposed to allow accurate transmission of MSG3 in SBFD symbols / slots. Some embodiments of this disclosure discuss SBFD operation in idle / inactive states and can have at least one of the following advantages: 1. Reduced initial / random access delay. 2. Improved PRACH and / or MSG3 coverage. 3. Increased flexibility of random / initial access by offloading random access from fixed UL slots to SBFD symbols / slots.

[0138] Figure 13 This is a block diagram of a wireless communication system 700 according to an embodiment of the present disclosure. The embodiments described herein can be implemented into the system using any suitably configured hardware and / or software. Figure 13System 700 is shown, comprising radio frequency (RF) circuitry 710, baseband circuitry 720, application circuitry 730, memory / storage device 740, display 750, camera 760, sensor 770, and input / output (I / O) interface 780, which are coupled to each other at least as shown. Application circuitry 730 may include circuitry, such as, but not limited to, one or more single-core or multi-core processors. The processor may include any combination of general-purpose processors and special-purpose processors (e.g., graphics processors, application processors, or digital signal processors). The processor may be coupled to the memory / storage device and configured to execute instructions stored in the memory / storage device to enable various applications and / or operating systems running on the system.

[0139] While this disclosure has been described in conjunction with embodiments that are considered to be the most practical and preferred, it should be understood that this disclosure is not limited to the disclosed embodiments, but is intended to cover various arrangements without departing from the broadest interpretation of the appended claims.

Claims

1. A wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, executed by a user equipment (UE), comprising: Receive configuration related to time-domain resources used for transmitting the Physical Random Channel Access PRACH preamble in SBFD symbols / slots; as well as The transmission of the PRACH preamble is performed in the SBFD symbol / slot; The configuration related to the time-domain resources used for transmitting the PRACH preamble in the SBFD symbols / slots includes: time-domain parameter configuration provided by a higher layer for transmitting the random access preamble in the SBFD symbols / slots, and / or time-domain resource configuration table provided by the higher layer for transmitting the random access preamble.

2. The wireless communication method according to claim 1, wherein, The UE is provided with an explicit configuration of time-domain parameters for transmitting random access preambles in the SBFD symbols / slots, the explicit configuration including at least one of the following parameters: Preamble format used for random access in the SBFD symbols / slots; The frame number / subframe number that includes the SBFD operation or the SBFD symbol / slot; The start symbol within the time slot is configured according to the start duration of the SBFD operation within the time slot; The number of PRACH slots in a subframe depends on the number or duration of SBFD operations in the subframe, and the number of PRACH slots in a subframe is configured according to the SBFD period in the time domain; The number of time-domain PRACH opportunities within a PRACH slot; and PRACH duration.

3. The wireless communication method according to claim 1, wherein, In the time-domain resource configuration table used for the transmission of the random access preamble, the PRACH configuration index is associated with a subframe in the time-division duplex (TDD) mode that contains the SBFD symbol / slot.

4. The wireless communication method according to claim 3, wherein, In the time-domain resource configuration table used for the random access preamble transmission, each PRACH configuration index is associated with a time-domain resource.

5. The wireless communication method according to claim 4, wherein, Each PRACH configuration index is associated with the preamble format, frame number / subframe number, start symbol within the slot, number of PRACH slots within the subframe, number of temporal PRACH events within the PRACH slot, and PRACH duration.

6. The wireless communication method according to claim 3, wherein, In the time-domain resource configuration table used for the transmission of the random access preamble, there is a PRACH configuration index 0-262 for the time-domain resources used to transmit the PRACH preamble in the SBFD symbol / slot.

7. The wireless communication method according to claim 3, wherein, In the time-domain resource configuration table used for the transmission of the random access preamble, there are PRACH configuration indices 262-524 for the time-domain resources used to transmit the PRACH preamble in the SBFD symbol / slot.

8. A wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, executed by a user equipment (UE), comprising: Based on the synchronization signal block SSB-to-RO mapping for the random access channel RACH timing RO in the SBFD symbol / slot, the transmission of physical random channel access PRACH is performed in the RO.

9. The wireless communication method according to claim 8, wherein, The SSB-to-RO mapping for ROs in the SBFD symbols / slots reuses existing specification rules and defines independent SSB-to-RO mappings for ROs configured in the SBFD symbols / slots and non-SBFD symbols / slots.

10. The wireless communication method according to claim 8, wherein, The ROs in the SBFD symbols / time slots are grouped together with the ROs in the non-SBFD symbols / time slots, and the RO group is mapped to the SSB.

11. The wireless communication method according to claim 10, wherein, The ROs in the SBFD symbols / slots are grouped together with at least one RO in the non-SBFD symbols / slots based on the ascending order of the RO index.

12. The wireless communication method according to claim 8, wherein, The ROs in the SBFD symbols / slots are grouped together based on the ROs in frequency division multiplexing (FDMed) within the time instance and at least one RO in the non-SBFD symbols / slots.

13. The wireless communication method according to claim 8, wherein, The RO in the SBFD symbol / slot is mapped to at least one RO in the non-SBFD symbol / slot.

14. The wireless communication method according to claim 13, wherein, The ROs in the SBFD symbols / slots are mapped to at least one RO in the non-SBFD symbols / slots in a one-to-one, one-to-many, many-to-one, or many-to-many manner.

15. A wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, executed by a user equipment (UE), comprising: The transmission of Physical Random Channel Access (PRACH) is performed in the RO based on at least one random access channel (RACH) timing RO verification rule to ensure the validity of the RO in the SBFD symbol / slot.

16. The wireless communication method according to claim 15, wherein, The at least one RO verification rule includes at least one of the following rules: RO configured within the bandwidth of the uplink UL subband is valid; For ROs that cross the boundaries of the SBFD symbols / slots and non-SBFD symbols / slots, they are considered valid when they are configured within the bandwidth of the UL subband; For ROs that cross the boundaries of the SBFD symbols / slots and non-SBFD symbols / slots, they are considered invalid if their bandwidth exceeds the limit of the UL subband. For ROs within the SBFD symbol / slot and the UL subband, if these ROs overlap with the synchronization signal block SSB, they are not considered valid ROs. For the RO in the SBFD symbol / slot, when the RO does not precede the synchronization signal / physical broadcast channel SS / PBCH block in the PRACH slot, and is at least N after the last non-SBFD downlink symbol. gap It begins with a symbol and is at least N symbols after the last SS / PBCH block symbol. gap The RO is valid when the symbol is first used.

17. A wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, executed by a user equipment (UE), comprising: Transmission of the Physical Random Channel Access (PRACH) preamble is performed in the SBFD symbol / slot, wherein the Physical Uplink Control Channel (PUCCH) for carrying the Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) message is mapped to the UL resources of the uplink UL subband in the SBFD symbol / slot.

18. The wireless communication method according to claim 17, wherein, The message is either Msg4 or MsgB.

19. The wireless communication method according to claim 17, wherein, Cell-specific PUCCHs for SBFD symbols / slots are configured to the UE via higher-layer signaling, and the higher-layer signaling indicates indexes in a table, wherein each index is associated with the PUCCH format, first symbol, number of symbols, PRB offset, and initial CS index set.

20. The wireless communication method according to claim 17, wherein, The physical resource block (PRB) offset of the cell-specific / public PUCCH resource set provided by the upper layer is defined based on the bandwidth of the UL subband.

21. The wireless communication method according to claim 20, wherein, The PRB offset of the cell-specific / public PUCCH resource set is located within the bandwidth of the UL subband, and the PRB offset set (i.e., the RB offset of the UL subband) includes [0, 3, 2, 4, (UL subband size) / 4].

22. The wireless communication method according to claim 17, wherein, The PRB offset is defined based on the bandwidth of the initial UL bandwidth portion BWP corresponding to the UL subband.

23. The wireless communication method according to claim 22, wherein, The PUCCH resource is located within the bandwidth of the UL subband, and for downlink, uplink, and downlink DUD SBFD subband modes, the PRB offset set includes: {(BWP size) / 3, (BWP size) / 3+3, (BWP size) / 3+2, (BWP size) / 3+4, (BWP size) / 2}.

24. The wireless communication method according to claim 22, wherein, The PUCCH resource is located within the bandwidth of the UL subband, and for downlink, uplink DU or uplink, downlink UD SBFD subband modes, the PRB offset set includes: {(BWP size) / 2, (BWP size) / 2+3, (BWP size) / 2+2, (BWP size) / 2+4, (BWP size) / 2}.

25. The wireless communication method according to claim 17, wherein, The starting point of the PUCCH is configured at a higher level.

26. The wireless communication method according to claim 17, wherein, Enable first intra-slot frequency hopping for the PUCCH located in the cell-specific / public resources of the SBFD symbol / slot, and configure independent intra-slot frequency hopping for the PUCCH located in the cell-specific / public resources of the SBFD symbol / slot through higher layers.

27. A wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, executed by a base station, comprising: Send configuration related to time-domain resources for transmitting the Physical Random Channel Access (PRACH) preamble in SBFD symbols / slots to the User Equipment (UE); as well as The UE is requested to perform the transmission of the PRACH preamble in the SBFD symbol / slot; The configuration related to the time-domain resources used for transmitting the PRACH preamble in the SBFD symbols / slots includes: time-domain parameter configuration provided by a higher layer for transmitting the random access preamble in the SBFD symbols / slots, and / or time-domain resource configuration table provided by the higher layer for transmitting the random access preamble.

28. The wireless communication method according to claim 27, wherein, The UE is provided with an explicit configuration of time-domain parameters for transmitting random access preambles in the SBFD symbols / slots, the explicit configuration including at least one of the following parameters: Preamble format used for random access in the SBFD symbols / slots; The frame number / subframe number that includes the SBFD operation or the SBFD symbol / slot; The start symbol within the time slot is configured according to the start duration of the SBFD operation within the time slot; The number of PRACH slots in a subframe depends on the number or duration of SBFD operations in the subframe, and the number of PRACH slots in a subframe is configured according to the SBFD period in the time domain; The number of time-domain PRACH opportunities within a PRACH slot; and PRACH duration.

29. The wireless communication method according to claim 27, wherein, In the time-domain resource configuration table used for the transmission of the random access preamble, the PRACH configuration index is associated with a subframe in the time-division duplex (TDD) mode that contains the SBFD symbol / slot.

30. The wireless communication method according to claim 29, wherein, In the time-domain resource configuration table used for the random access preamble transmission, each PRACH configuration index is associated with a time-domain resource.

31. The wireless communication method according to claim 30, wherein, Each PRACH configuration index is associated with the preamble format, frame number / subframe number, start symbol within the slot, number of PRACH slots within the subframe, number of temporal PRACH events within the PRACH slot, and PRACH duration.

32. The wireless communication method according to claim 29, wherein, In the time-domain resource configuration table used for the transmission of the random access preamble, there is a PRACH configuration index 0-262 for the time-domain resources used to transmit the PRACH preamble in the SBFD symbol / slot.

33. The wireless communication method according to claim 29, wherein, In the time-domain resource configuration table used for the transmission of the random access preamble, there are PRACH configuration indices 262-524 for the time-domain resources used to transmit the PRACH preamble in the SBFD symbol / slot.

34. A wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, executed by a base station, comprising: The user equipment (UE) is requested to perform physical random channel access (PRACH) transmission in the RO based on the synchronization signal block SSB-to-RO mapping for the random access channel (RACH) timing RO in the SBFD symbol / slot.

35. The wireless communication method according to claim 34, wherein, The SSB-to-RO mapping for ROs in the SBFD symbols / slots reuses existing specification rules and defines independent SSB-to-RO mappings for ROs configured in the SBFD symbols / slots and non-SBFD symbols / slots.

36. The wireless communication method according to claim 34, wherein, The ROs in the SBFD symbols / time slots are grouped together with the ROs in the non-SBFD symbols / time slots, and the RO group is mapped to the SSB.

37. The wireless communication method according to claim 36, wherein, The ROs in the SBFD symbols / slots are grouped together with at least one RO in the non-SBFD symbols / slots based on the ascending order of the RO index.

38. The wireless communication method according to claim 34, wherein, The ROs in the SBFD symbols / slots are grouped together based on the ROs in frequency division multiplexing (FDMed) within the time instance and at least one RO in the non-SBFD symbols / slots.

39. The wireless communication method according to claim 34, wherein, The RO in the SBFD symbol / slot is mapped to at least one RO in the non-SBFD symbol / slot.

40. The wireless communication method according to claim 39, wherein, The ROs in the SBFD symbols / slots are mapped to at least one RO in the non-SBFD symbols / slots in a one-to-one, one-to-many, many-to-one, or many-to-many manner.

41. A wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, executed by a base station, comprising: The User Equipment (UE) is requested to perform Physical Random Channel Access (PRACH) transmission in the RO based on at least one Random Access Channel (RACH) timing RO verification rule to ensure the validity of the RO in the SBFD symbol / slot.

42. The wireless communication method according to claim 41, wherein, The at least one RO verification rule includes at least one of the following rules: RO configured within the bandwidth of the uplink UL subband is valid; For ROs that cross the boundaries of the SBFD symbols / slots and non-SBFD symbols / slots, they are considered valid when they are configured within the bandwidth of the UL subband; For ROs that cross the boundaries of the SBFD symbols / slots and non-SBFD symbols / slots, they are considered invalid if their bandwidth exceeds the limit of the UL subband. For ROs within the SBFD symbol / slot and the UL subband, if these ROs overlap with the synchronization signal block SSB, they are not considered valid ROs. For the RO in the SBFD symbol / slot, when the RO does not precede the synchronization signal / physical broadcast channel SS / PBCH block in the PRACH slot, and is at least N after the last non-SBFD downlink symbol. gap It begins with a symbol and is at least N symbols after the last SS / PBCH block symbol. gap The RO is valid when the symbol is first used.

43. A wireless communication method for random access in sub-band full-duplex SBFD symbols / slots, executed by a base station, comprising: The user equipment (UE) is requested to transmit the physical random channel access (PRACH) preamble in the SBFD symbol / slot, wherein the physical uplink control channel (PUCCH) used to carry the hybrid automatic repeat request acknowledgment (HARQ-ACK) message is mapped to the UL resources of the uplink UL subband in the SBFD symbol / slot.

44. The wireless communication method according to claim 43, wherein, The message is either Msg4 or MsgB.

45. The wireless communication method according to claim 43, wherein, Cell-specific PUCCHs for SBFD symbols / slots are configured to the UE via higher-layer signaling, and the higher-layer signaling indicates indexes in a table, wherein each index is associated with the PUCCH format, first symbol, number of symbols, PRB offset, and initial CS index set.

46. ​​The wireless communication method according to claim 43, wherein, The physical resource block (PRB) offset of the cell-specific / public PUCCH resource set provided by the upper layer is defined based on the bandwidth of the UL subband.

47. The wireless communication method according to claim 46, wherein, The PRB offset of the cell-specific / public PUCCH resource set is located within the bandwidth of the UL subband, and the PRB offset set (i.e., the RB offset of the UL subband) includes [0, 3, 2, 4, (UL subband size) / 4].

48. The wireless communication method according to claim 43, wherein, The PRB offset is defined based on the bandwidth of the initial UL bandwidth portion BWP corresponding to the UL subband.

49. The wireless communication method according to claim 48, wherein, The PUCCH resource is located within the bandwidth of the UL subband, and for downlink, uplink, and downlink DUD SBFD subband modes, the PRB offset set includes: {(BWP size) / 3, (BWP size) / 3+3, (BWP size) / 3+2, (BWP size) / 3+4, (BWP size) / 2}.

50. The wireless communication method according to claim 48, wherein, The PUCCH resource is located within the bandwidth of the UL subband, and for downlink, uplink DU or uplink, downlink UD SBFD subband modes, the PRB offset set includes: {(BWP size) / 2, (BWP size) / 2+3, (BWP size) / 2+2, (BWP size) / 2+4, (BWP size) / 2}.

51. The wireless communication method according to claim 43, wherein, The starting point of the PUCCH is configured at a higher level.

52. The wireless communication method according to claim 43, wherein, Enable first intra-slot frequency hopping for the PUCCH located in the cell-specific / public resources of the SBFD symbol / slot, and configure independent intra-slot frequency hopping for the PUCCH located in the cell-specific / public resources of the SBFD symbol / slot through higher layers.

53. A user equipment (UE), comprising: Memory; transceiver; as well as The processor is coupled to the memory and the transceiver; The UE is configured to perform the method as described in any one of claims 1 to 26.

54. A base station, comprising: Memory; transceiver; as well as The processor is coupled to the memory and the transceiver; The base station is configured to perform the method as described in any one of claims 27 to 52.

Images