A method and apparatus in a node for wireless communication

Abstract

A method and apparatus in a node for wireless communication are disclosed. The node receives a first information block indicating a plurality of PRACH opportunities; the node receives a second information block indicating a target sub-band and at least one full duplex symbol; a first PRACH opportunity is one of the plurality of PRACH opportunities indicated by the first information block, the first PRACH opportunity has an overlap between a time domain and the at least one full duplex symbol indicated by the second information block; a synchronization broadcast signal is mapped to a valid PRACH opportunity of the plurality of PRACH opportunities, a validity of the first PRACH opportunity depends on a relationship between the first PRACH opportunity and the target sub-band in a frequency domain. The present application improves random access capacity.

Description

A method and device in a node for wireless communication

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on February 6, 2024, with application number 202410172173.5 and invention name “A method and device in a node for wireless communication”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to a transmission method and apparatus in a wireless communication system, and more particularly to a transmission scheme and apparatus with flexible transmission direction configuration in wireless communication. Background Art

[0003] The application scenarios of future wireless communication systems are becoming increasingly diverse, and different scenarios place varying performance requirements on the systems. To meet the diverse performance demands of various application scenarios, the 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) Plenary #72 decided to conduct research on New Radio (NR) (or 5G). The 3GPP RAN #75 Plenary approved the WI (Work Item) for New Radio (NR), initiating standardization work on NR. The 3GPP RAN #86 Plenary decided to initiate work on the SI (Study Item) and WI (Work Item) for NR Rel-17, and the 3GPP RAN #94e Plenary approved the SI and WI for NR Rel-18. The 3GPP RAN #102 Plenary decided to initiate work on the SI and WI for NR Rel-19.

[0004] NR Rel-19 includes Wi-Fi that supports non-overlapping sub-band full duplex (SBFD). Non-overlapping sub-band full duplex is also one of the technologies that 6G may support. Summary of the Invention

[0005] In existing NR systems, spectrum resources are statically divided into FDD and TDD spectrum. For TDD spectrum, both base stations and user equipment operate in half-duplex mode. This half-duplex mode avoids self-interference and mitigates the impact of cross-link interference, but it also reduces resource utilization and increases latency. To address these issues, supporting flexible duplex modes in either TDD or FDD spectrum is a possible solution.

[0006] In response to the problem of random access configuration in supporting flexible duplex mode, the present application discloses a solution. It should be noted that in the description of the present application, the flexible duplex mode is only used as a typical application scenario or example; the present application is also applicable to 6G networks or other scenarios facing similar problems (for example, scenarios where the link direction changes, or other scenarios that support multi-level configuration of transmission directions, or base stations or user equipment with stronger capabilities, such as scenarios that support full-duplex in the same frequency, or for different application scenarios, such as eMBB, URLLC, non-terrestrial networks, synaesthesia integrated networks, smart metasurfaces, and terahertz networks, similar technical effects can also be achieved. In addition, the use of a unified solution for different scenarios (including but not limited to eMBB, URLLC, non-terrestrial networks, synaesthesia integrated networks, smart metasurfaces, and terahertz networks) or different application parameters can also help reduce hardware complexity and cost. In the absence of conflict, the embodiments and features of the embodiments of the present application used for the first node can be applied to the device used for the second node in the present application, and vice versa.

[0007] The present application discloses a method in a first node for wireless communication, characterized by comprising:

[0008] receiving a first information block indicating a plurality of PRACH opportunities;

[0009] receiving a second information block, the second information block indicating a target sub-band and at least one full-duplex symbol;

[0010] The first PRACH opportunity is one of the multiple PRACH opportunities indicated by the first information block, and the first PRACH opportunity overlaps in the time domain with at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0011] As an embodiment, by continuing to use the definition of valid PRACH (Physical Random Access Channel) opportunity, the configuration of PRACH opportunities in full-duplex time domain symbols is achieved, which simplifies the design while ensuring backward compatibility.

[0012] As an embodiment, the validity judgment of a PRACH opportunity is made dependent on the relationship with the target sub-band, thereby ensuring effective mapping between the PRACH opportunity and the synchronized broadcast signal, while ensuring the transmission performance of the PRACH.

[0013] According to one aspect of the present application, the above method is characterized in that the validity of the first PRACH opportunity also depends on the relationship between the interval length of the first PRACH opportunity in the time domain and between adjacent non-full-duplex symbols and a first threshold, and the first threshold is configured or predefined and / or related to the user equipment capability.

[0014] According to one aspect of the present application, the above method is characterized in that the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity and at least one boundary of the target sub-band in the frequency domain is not less than a second threshold. It is a condition for the validity of the first PRACH opportunity, and the second threshold is predefined or configured.

[0015] According to one aspect of the present application, the above method is characterized in that any valid PRACH opportunity among the multiple PRACH opportunities is located in an uplink symbol in the time domain, or in a full-duplex symbol in the time domain, or in a flexible symbol in the time domain.

[0016] According to one aspect of the present application, the above method is characterized in that the multiple PRACH opportunities belong to a reference sub-band in the frequency domain, the target sub-band and the reference sub-band are non-orthogonal, and the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band.

[0017] According to one aspect of the present application, the above method is characterized in that the second PRACH opportunity is one of the multiple PRACH opportunities, and the second PRACH opportunity is located in the flexible symbol in the time domain but not in the full-duplex symbol; when the second PRACH opportunity belongs to the target sub-band in the frequency domain, the second PRACH opportunity is valid; when the second PRACH opportunity does not belong to the target sub-band in the frequency domain and the second PRACH opportunity is not located before the synchronization broadcast signal belonging to the same PRACH time slot in the time domain and the start of the second PRACH opportunity is at least M symbols later than the previous downlink symbol and the previous synchronization broadcast signal, the second PRACH opportunity is valid, and M is a non-negative integer related to the subcarrier spacing of the random access preamble.

[0018] According to one aspect of the present application, the above method is characterized in that the PRACH opportunities among the multiple PRACH opportunities that are located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration in the time domain and the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are each mapped to a synchronized broadcast signal.

[0019] The present application discloses a method in a second node for wireless communication, characterized by comprising:

[0020] sending a first information block, the first information block indicating a plurality of PRACH opportunities;

[0021] sending a second information block, wherein the second information block indicates a target sub-band and at least one full-duplex symbol;

[0022] The first PRACH opportunity is one of the multiple PRACH opportunities indicated by the first information block, and the first PRACH opportunity overlaps in the time domain with at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0023] According to one aspect of the present application, the above method is characterized in that the validity of the first PRACH opportunity also depends on the relationship between the interval length of the first PRACH opportunity in the time domain and between adjacent non-full-duplex symbols and a first threshold, and the first threshold is configured or predefined and / or related to the user equipment capability.

[0024] According to one aspect of the present application, the above method is characterized in that the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity and at least one boundary of the target sub-band in the frequency domain is not less than a second threshold. It is a condition for the validity of the first PRACH opportunity, and the second threshold is predefined or configured.

[0025] According to one aspect of the present application, the above method is characterized in that any valid PRACH opportunity among the multiple PRACH opportunities is located in an uplink symbol in the time domain, or in a full-duplex symbol in the time domain, or in a flexible symbol in the time domain.

[0026] According to one aspect of the present application, the above method is characterized in that the multiple PRACH opportunities belong to a reference sub-band in the frequency domain, the target sub-band and the reference sub-band are non-orthogonal, and the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band.

[0027] According to one aspect of the present application, the above method is characterized in that the second PRACH opportunity is one of the multiple PRACH opportunities, and the second PRACH opportunity is located in the flexible symbol in the time domain but not in the full-duplex symbol; when the second PRACH opportunity belongs to the target sub-band in the frequency domain, the second PRACH opportunity is valid; when the second PRACH opportunity does not belong to the target sub-band in the frequency domain and the second PRACH opportunity is not located before the synchronization broadcast signal belonging to the same PRACH time slot in the time domain and the start of the second PRACH opportunity is at least M symbols later than the previous downlink symbol and the previous synchronization broadcast signal, the second PRACH opportunity is valid, and M is a non-negative integer related to the subcarrier spacing of the random access preamble.

[0028] According to one aspect of the present application, the above method is characterized in that the PRACH opportunities among the multiple PRACH opportunities that are located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration in the time domain and the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are each mapped to a synchronized broadcast signal.

[0029] The present application discloses a first node device for wireless communication, characterized by comprising:

[0030] A first receiver receives a first information block, wherein the first information block indicates a plurality of PRACH opportunities;

[0031] The first receiver receives a second information block, the second information block indicating a target sub-band and at least one full-duplex symbol;

[0032] The first PRACH opportunity is one of the multiple PRACH opportunities indicated by the first information block, and the first PRACH opportunity overlaps in the time domain with at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0033] The present application discloses a second node device for wireless communication, characterized by comprising:

[0034] A first transmitter sends a first information block, where the first information block indicates a plurality of PRACH opportunities;

[0035] The first transmitter transmits a second information block, wherein the second information block indicates a target sub-band and at least one full-duplex symbol;

[0036] The first PRACH opportunity is one of the multiple PRACH opportunities indicated by the first information block, and the first PRACH opportunity overlaps in the time domain with at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0038] FIG1 shows a flow chart of a first information block and a second information block according to an embodiment of the present application;

[0039] FIG2 shows a schematic diagram of a network architecture according to an embodiment of the present application;

[0040] FIG3 shows a schematic diagram of a wireless protocol architecture of a user plane and a control plane according to an embodiment of the present application;

[0041] FIG4 shows a schematic diagram of a first node device and a second node device according to an embodiment of the present application;

[0042] FIG5 shows a wireless signal transmission flow chart according to an embodiment of the present application;

[0043] FIG6 shows a schematic diagram of a first threshold according to an embodiment of the present application;

[0044] FIG7 shows a schematic diagram of a second threshold according to an embodiment of the present application;

[0045] FIG8 shows a schematic diagram of multiple PRACH opportunities according to an embodiment of the present application;

[0046] FIG9 is a schematic diagram showing the relationship between a target sub-band and a reference sub-band according to an embodiment of the present application;

[0047] FIG10 shows a schematic diagram of a second PRACH opportunity according to an embodiment of the present application;

[0048] FIG11 shows a schematic diagram of mapping multiple PRACH opportunities and synchronized broadcast signals according to an embodiment of the present application;

[0049] FIG12 shows a structural block diagram of a processing device in a first node device according to an embodiment of the present application;

[0050] FIG13 shows a structural block diagram of a processing device in a second node device according to an embodiment of the present application. DETAILED DESCRIPTION

[0051] The technical solution of the present application will be further described in detail below in conjunction with the accompanying drawings. It should be noted that, unless there is a conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

[0052] Example 1

[0053] Example 1 illustrates a flowchart 100 of a first information block and a second information block according to an embodiment of the present application, as shown in FIG1 . In FIG1 , each box represents a step, and it is particularly important to emphasize that the order of the boxes in the figure does not limit the temporal sequence of the steps represented.

[0054] In embodiment 1, the first node device in the present application receives a first information block in step 101, and the first information block indicates multiple PRACH opportunities; the first node device in the present application receives a second information block in step 102, and the second information block indicates a target sub-band and at least one full-duplex symbol; wherein the first PRACH opportunity is one of the multiple PRACH opportunities indicated by the first information block, and the first PRACH opportunity overlaps in the time domain with the at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0055] As an embodiment, the first information block includes higher-layer information or higher-layer parameter configuration.

[0056] As an embodiment, the first information block includes one or more IEs (Information Elements) included in RRC (Radio Resource Control) layer signaling, or the first information block includes one or more fields (Field) included in RRC layer signaling. As a subsidiary embodiment of the above embodiment, the first information block including RRC layer information can reduce signaling overhead.

[0057] As an embodiment, the first information block includes part or all of the fields included in a SIB.

[0058] As an embodiment, the first information block is cell common (Cell Common) or the first information block is cell specific (Cell specific).

[0059] As an embodiment, the first information block is group common.

[0060] As an embodiment, the first information block is user equipment specific (UE specific or UE dedicated).

[0061] As an embodiment, the first information block is configured per subband. As a subsidiary embodiment of the above embodiment, configuring the first information block per subband can improve the configuration flexibility of PRACH opportunities in full-duplex mode.

[0062] As an embodiment, the first information block is configured for a carrier (per carrier). As a subsidiary embodiment of the above embodiment, per-carrier configuration can reduce complexity.

[0063] As an embodiment, the first information block is configured for a bandwidth part (BWP) (Per BWP). As a subsidiary embodiment of the above embodiment, the existing design can be reused for BWP configuration to reduce standardization work.

[0064] As an embodiment, the first information block includes part or all of the fields in the IE "RACH-ConfigDedicated".

[0065] As an embodiment, the first information block includes the field "CFRA" or the field "CFRA-TwoStep-r16".

[0066] As an embodiment, the first information block includes the field "msg1-FDM" or the field "msgA-RO-FDM-r16".

[0067] As an embodiment, the first information block includes part or all of the fields in the IE "rach-ConfigGeneric".

[0068] As an embodiment, the first information block includes part or all of the fields in the IE "SI-RequestConfig".

[0069] As an embodiment, the first information block includes part or all of the fields in the IE "RACH-ConfigCommon".

[0070] As an embodiment, the first information block includes part or all of the fields in the IE "BeamFailureRecoveryConfig".

[0071] As an embodiment, the first information block includes part or all of the fields in the IE "BWP-UplinkCommon".

[0072] As an embodiment, the first information block includes part or all of the fields in the IE "ServingCellConfigCommon".

[0073] As an embodiment, the first information block includes part or all of the fields in the IE "RACH-ConfigGenericTwoStepRA".

[0074] As an embodiment, the first information block includes part or all of the fields in the IE "ServingCellConfig".

[0075] As an embodiment, the first information block includes part or all of the fields in the IE "RACH-ConfigCommonTwoStepRA".

[0076] As an embodiment, the first information block includes part or all of the fields in a DCI format. As a subsidiary embodiment of the above embodiment, the first information block includes DCI to provide greater flexibility.

[0077] As an embodiment, the first information block is transmitted on a PDCCH (physical downlink control channel).

[0078] As an embodiment, any one of the multiple PRACH opportunities includes allocated or configured PRACH time-frequency resources.

[0079] As an embodiment, any one of the multiple PRACH opportunities is a PRACH time-frequency opportunity.

[0080] As an embodiment, any one of the multiple PRACH opportunities includes time-frequency resources occupied by one PRACH transmission.

[0081] As an embodiment, there are two frequency division multiplexed (FDM) PRACH opportunities among the multiple PRACH opportunities.

[0082] As an embodiment, any two PRACH opportunities among the multiple PRACH opportunities are time division multiplexed.

[0083] As an embodiment, any two PRACH opportunities among the multiple PRACH opportunities include the same time domain resources.

[0084] As an embodiment, there are two PRACH opportunities among the multiple PRACH opportunities that include different time domain resources.

[0085] As an embodiment, any two PRACH opportunities in the plurality of PRACH opportunities are for the same preamble format. As a subsidiary embodiment of the above embodiment, the advantage of this is that the design is simple.

[0086] As an embodiment, two PRACH opportunities in the plurality of PRACH opportunities are for different preamble formats. As a subsidiary embodiment of the above embodiment, the benefit of doing so is to enhance flexibility.

[0087] As an embodiment, the technical feature "the first information block indicates multiple PRACH opportunities" includes: all or part of the first information block explicitly or implicitly indicates the multiple PRACH opportunities.

[0088] As an embodiment, the technical feature "the first information block indicates multiple PRACH opportunities" includes: the first information block is used to determine the multiple PRACH opportunities.

[0089] As an embodiment, the technical feature "the first information block indicates multiple PRACH opportunities" includes: the first information block indicates the time-frequency resources included in at least one PRACH opportunity among the multiple PRACH opportunities.

[0090] As an embodiment, the technical feature "the first information block indicates multiple PRACH opportunities" includes: the first information block indicates the number of frequency-divided PRACH opportunities in the same time domain resources among the multiple PRACH opportunities.

[0091] As an embodiment, the technical feature "the first information block indicates multiple PRACH opportunities" includes: the first information block indicates the starting frequency domain resource of the lowest PRACH opportunity in the frequency domain among the multiple PRACH opportunities.

[0092] As an embodiment, the technical feature "the first information block indicates multiple PRACH opportunities" includes: the first information block indicates a PRACH configuration index (configuration index), and the PRACH configuration index indicated by the first information block configures the time domain resources of at least one PRACH opportunity of the multiple PRACH opportunities.

[0093] As an embodiment, the first information block is earlier than the second information block.

[0094] As an embodiment, the first information block is later than the second information block.

[0095] As an embodiment, the first information block and the second information block are transmitted through the same physical channel.

[0096] As an embodiment, the first information block and the second information block respectively include different IEs or fields included in the same IE.

[0097] As an embodiment, the second information block includes higher-layer information or higher-layer parameter configuration.

[0098] As an embodiment, the second information block includes one or more IEs included in RRC layer signaling, or the second information block includes one or more fields included in RRC layer signaling. As a subsidiary embodiment of the above embodiment, the second information block including RRC layer information can reduce signaling overhead.

[0099] As an embodiment, the second information block includes part or all of the fields included in a SIB.

[0100] As an embodiment, the second information block is cell common (Cell Common) or the second information block is cell specific (Cell specific).

[0101] As an embodiment, the second information block is group common.

[0102] As an embodiment, the second information block is user equipment specific (UE specific or UE dedicated).

[0103] As an embodiment, the second information block is configured for a sub-band (per subband).

[0104] As an embodiment, the second information block is configured for a carrier (per carrier). As a subsidiary embodiment of the above embodiment, configuring SBFD per carrier reduces complexity.

[0105] As an embodiment, the second information block is configured for a bandwidth part (BWP) (per BWP). As a subsidiary embodiment of the above embodiment, configuring SBFD per BWP can reuse existing designs and reduce standardization work.

[0106] As an embodiment, the second information block includes part or all of the fields in the IE "SBFDConfigDedicated-r19".

[0107] As an embodiment, the second information block includes part or all of the fields in IE "SBFDConfigCommon-r19".

[0108] As an embodiment, the second information block includes part or all of the fields in IE "SBFDConfig-r19".

[0109] As an embodiment, the second information block includes part or all of the fields in the IE "ServingCellConfigCommon".

[0110] As an embodiment, the second information block includes part or all of the fields in the IE "CellGroupConfig".

[0111] As an embodiment, the second information block includes part or all of the fields in the IE "SpCellConfig".

[0112] As an embodiment, the second information block includes part or all of the fields in the IE "SCellConfig".

[0113] As an embodiment, the second information block includes part or all of the fields in the IE "ServingCellConfigCommonSIB".

[0114] As an embodiment, the second information block includes part or all of the fields in the IE "ServingCellConfig".

[0115] As an embodiment, the second information block includes part or all of the fields in DCI (downlink control information) format 2_N, where N is a non-negative integer.

[0116] As an embodiment, the second information block includes part or all of the fields in DCI format 2_10.

[0117] As an embodiment, the second information block includes part or all of the fields in a DCI format.As a subsidiary embodiment of the above embodiment, the second information block includes DCI to provide greater flexibility.

[0118] As an embodiment, the second information block is transmitted on a PDCCH (physical downlink control channel).

[0119] As an embodiment, the second information block configures a time slot or symbol of SBFD (Subband non-overlapping Full Duplex).

[0120] As an embodiment, the second information block configures at least one of an uplink subband (UL subband), a downlink subband (DL subband) or a guard band (guardband) of the SBFD.

[0121] As an embodiment, the second information block configuration supports time slots or symbols for full duplex.

[0122] As an embodiment, the target sub-band is a full duplex sub-band.

[0123] As an embodiment, the target sub-band is a full-duplex sub-band for uplink.

[0124] As an embodiment, the target sub-band is an uplink SBFD sub-band.

[0125] As an embodiment, the target sub-band is a sub-band that can be used for uplink transmission in downlink symbols or flexible symbols.

[0126] As an embodiment, the target sub-band includes guard frequency domain resources (guard).

[0127] As an embodiment, the target sub-band does not include protected frequency domain resources.

[0128] As an embodiment, the target sub-band includes continuous frequency domain resources.

[0129] As an embodiment, an uplink BWP includes all or part of the frequency domain resources in the target sub-band. As a subsidiary embodiment of the above embodiment, the target sub-band belongs to the uplink BWP, which can maximize the reuse of existing designs and reduce design complexity.

[0130] As an embodiment, an uplink active BWP includes all or part of the frequency domain resources in the target sub-band. As a subsidiary embodiment of the above embodiment, the uplink active BWP includes part of the resources in the target sub-band to support carrier-level sub-band configuration and increase flexibility.

[0131] As an embodiment, in a time domain symbol, there are overlapping frequency domain resources between the target sub-band and the active uplink BWP.

[0132] As an embodiment, in a time domain symbol, there are no overlapping frequency domain resources between the target sub-band and the active uplink BWP.

[0133] As an embodiment, the boundary of the RB (Resource Block) included in the target sub-band is aligned with the boundary of the RB in the uplink BWP. As a subsidiary embodiment of the above embodiment, uplink resource fragmentation is avoided and coverage is improved.

[0134] As an embodiment, the target sub-band is spaced per numerology or per sub-carrier.

[0135] As an embodiment, the target sub-band is per resource grid. As a subsidiary embodiment of the above embodiment, configuring sub-band per grid improves configuration flexibility.

[0136] As an embodiment, the target sub-band is configured per BWP. As a subsidiary embodiment of the above embodiment, configuring the sub-band per BWP ensures compatibility and reduces standard complexity.

[0137] As an embodiment, the boundaries of the RBs included in the target sub-band are aligned with the boundaries of the RBs in the downlink BWP. As a subsidiary embodiment of the above embodiment, downlink resource fragmentation is avoided and scheduling flexibility is guaranteed.

[0138] As an embodiment, the second information block indicating the target sub-frequency band includes: all or part of the second information block explicitly or implicitly indicating the target sub-frequency band.

[0139] As an embodiment, the second information block indicating the target sub-band includes: the second information block indicating the starting RB (or the RB with the lowest index) of the target sub-band.

[0140] As an embodiment, the second information block indicating the target sub-band includes: the second information block indicating the number of RBs included in the target sub-band.

[0141] As an embodiment, the second information block indicating the target sub-frequency band includes: the second information block indicating the RIV (resource indicator value) corresponding to the target sub-frequency band.

[0142] As an embodiment, the second information block indicating the target sub-band includes: the second information block indicating the RIV corresponding to the target sub-band, and the starting RB of the target sub-band and the number of consecutive RBs included are used to generate the corresponding RIV.

[0143] As an embodiment, the second information block indicating the target sub-frequency band includes: the second information block indicating the SLIV (start and length indicator value) corresponding to the target sub-frequency band.

[0144] As an embodiment, the second information block indicating the target sub-band includes: the second information block indicating the SLIV corresponding to the target sub-band, and the starting RB of the target sub-band and the number of included consecutive RBs are used to generate the corresponding SLIV.

[0145] As an embodiment, the second information block indicating the target sub-band includes: the second information block indicating at least one CRB (common resource block) for one subcarrier spacing included in the target sub-band.

[0146] As an embodiment, the second information block indicates that the target sub-band includes: the second information block indicates the number of CRBs spaced between the lowest-indexed CRB included in the target sub-band and frequency point A (point A) and the number of consecutive CRBs included in the target sub-band.

[0147] In one embodiment, the second information block indicates the target sub-band, including: all or part of the second information block explicitly or implicitly indicating the number of CRBs for the reference sub-carrier spacing between the lowest index of the CRB for the reference sub-carrier spacing included in the target sub-band and frequency point A, and the number of consecutive CRBs for the reference sub-carrier spacing included in the target sub-band. As a subsidiary embodiment of the above embodiment, the reference sub-carrier spacing is equal to the sub-carrier spacing in an uplink resource grid; the benefit of doing so includes avoiding resource fragmentation. As a subsidiary embodiment of the above embodiment, the reference sub-carrier spacing is equal to the sub-carrier spacing in a downlink resource grid; the benefit of doing so is to improve scheduling flexibility. As a subsidiary embodiment of the above embodiment, the reference sub-carrier spacing is related to a frequency range (FR). As a subsidiary embodiment of the above embodiment, the reference sub-carrier spacing is predefined or configured. As an auxiliary embodiment of the above embodiment, the reference subcarrier spacing is the maximum value among the subcarrier spacings respectively targeted by the multiple configured uplink resource grids; the advantage of doing so is that alignment with uplink resources is ensured. As an auxiliary embodiment of the above embodiment, the reference subcarrier spacing is the maximum value among the subcarrier spacings respectively targeted by the multiple configured downlink resource grids; the advantage of doing so is that alignment with downlink resources is ensured. As an auxiliary embodiment of the above embodiment, the reference subcarrier spacing is the maximum value among the subcarrier spacings respectively targeted by all configured resource grids; the advantage of doing so is that alignment with both uplink and downlink resources is ensured.

[0148] As an embodiment, the second information block indicating the target sub-band includes: the second information block indicates M1 sub-bands from M1 resource grids respectively, M1 is a positive integer greater than 1, and the target sub-band is one of the M1 sub-bands. As an auxiliary embodiment of the above embodiment, the M1 resource grids are M1 uplink resource grids; the advantage of doing so is that the fragmentation of uplink resources is avoided while not increasing signaling overhead. As an auxiliary embodiment of the above embodiment, the M1 resource grids are M1 downlink resource grids; the advantage of doing so is that the fragmentation of downlink resources is avoided while not increasing signaling overhead. As an auxiliary embodiment of the above embodiment, the M1 resource grids include both uplink resource grids and downlink resource grids; the advantage of doing so is that uplink and downlink resource allocation is considered at the same time but some signaling overhead will be increased. As an auxiliary embodiment of the above embodiment, the M1 resource grids are configured.

[0149] As an embodiment, the full-duplex symbol indicated by the second information block is a time domain symbol configured with the target sub-frequency band.

[0150] As an embodiment, a full-duplex symbol is a SBFD symbol.

[0151] As an embodiment, a full-duplex symbol is an OFDM (Orthogonal Frequency Division Multiplexing) symbol.

[0152] As an embodiment, a full-duplex symbol is a time-domain symbol configured with SBFD.

[0153] As an embodiment, a full-duplex symbol is a time-domain symbol in an SBFD time slot.

[0154] As an embodiment, a full-duplex symbol is a time-domain symbol in which the SBFD subband is configured in the time domain.

[0155] As an embodiment, a full-duplex symbol is a time-domain symbol supporting full-duplex.

[0156] As an embodiment, a full-duplex symbol is a time-domain symbol to which SBFD is applicable.

[0157] As an embodiment, a full-duplex symbol is a time domain symbol capable of simultaneous uplink transmission and downlink transmission.

[0158] As an embodiment, a full-duplex symbol is a time domain symbol that can simultaneously perform uplink transmission and downlink transmission on the network side (or base station side).

[0159] As an embodiment, a full-duplex symbol is a time domain symbol that can simultaneously perform uplink transmission and downlink transmission on both the network side (or base station side) and the user equipment side.

[0160] As an embodiment, a full-duplex symbol is a time-domain symbol indicated (or provided) by signaling for configuring SBFD.

[0161] As an embodiment, one full-duplex symbol is a symbol indicated as a downlink symbol by "tdd-UL-DL-ConfigCommon".

[0162] As an embodiment, one full-duplex symbol is indicated by "tdd-UL-DL-ConfigCommon" as a downlink or flexible symbol.

[0163] As an embodiment, both downlink and flexible symbols are considered to expand configuration flexibility.

[0164] As an embodiment, only downlink symbols are considered, which simplifies system design.

[0165] As an embodiment, a full-duplex symbol is a symbol indicated as downlink by "tdd-UL-DL-ConfigCommon" but can be used for uplink transmission.

[0166] As an embodiment, the second information block indicating at least one full-duplex symbol includes: all or part of the second information block explicitly or implicitly indicating at least one full-duplex symbol.

[0167] As an embodiment, the second information block indicating at least one full-duplex symbol includes: the second information block indicating only one full-duplex symbol.

[0168] As an embodiment, the second information block indicating at least one full-duplex symbol includes: the second information block indicating multiple full-duplex symbols.

[0169] As an embodiment, the second information block indicates at least one full-duplex symbol, including: a position or index of the at least one full-duplex symbol in the time domain depends on the second information block.

[0170] As an embodiment, the second information block indicating at least one full-duplex symbol includes: the second information block indicating at least one symbol from a time window is a full-duplex symbol.

[0171] As an embodiment, the second information block indicating at least one full-duplex symbol includes: the symbol indicated (or provided) by the second information block is a full-duplex symbol.

[0172] As an embodiment, the second information block indicating at least one full-duplex symbol includes: the second information block indicating at least one downlink symbol indicated by tdd-UL-DL-ConfigCommon as a full-duplex symbol.

[0173] As an embodiment, the second information block indicating at least one full-duplex symbol includes: the symbol indicated (or provided) by the second information block and indicated by tdd-UL-DL-ConfigCommon as a downlink is a full-duplex symbol.

[0174] As an embodiment, the second information block indicating at least one full-duplex symbol includes: the symbol indicated (or provided) by the second information block and indicated by tdd-UL-DL-ConfigCommon as a downlink or flexible symbol is a full-duplex symbol.

[0175] As an embodiment, the second information block indicates at least one full-duplex symbol, including: a symbol that overlaps with the symbol indicated (or provided) by the second information block in the time domain is a full-duplex symbol.

[0176] As an embodiment, the second information block indicates at least one full-duplex symbol including: the symbol indicated as downlink by tdd-UL-DL-ConfigCommon that fully or partially overlaps in the time domain with the symbol indicated (or provided) by the second information block is a full-duplex symbol.

[0177] As an embodiment, the second information block indicates that at least one full-duplex symbol includes: symbols indicated as downlink or flexible by tdd-UL-DL-ConfigCommon that fully or partially overlap in the time domain with the symbols indicated (or provided) by the second information block are full-duplex symbols.

[0178] As an embodiment, the second information block indicates that at least one full-duplex symbol includes: a symbol indicated as downlink by tdd-UL-DL-ConfigCommon and fully or partially overlapping with the symbol indicated (or provided) by the second information block in the time domain is a full-duplex symbol.

[0179] As an embodiment, the second information block indicates that at least one full-duplex symbol includes: symbols indicated by tdd-UL-DL-ConfigCommon as downlink or flexible and fully or partially overlapping in the time domain with the symbols indicated (or provided) by the second information block are full-duplex symbols.

[0180] As an embodiment, the second information block indicates at least one full-duplex symbol, including: the second information block indicates at least one symbol according to the reference subcarrier spacing, any one time domain symbol indicated by tdd-UL-DL-ConfigCommon as a downlink that overlaps with the symbol indicated by the second information block is a full-duplex symbol, and the reference subcarrier spacing is predefined or configured by signaling. As an auxiliary embodiment of the above embodiment, the reference subcarrier spacing being predefined means that the reference subcarrier spacing is fixed. As an auxiliary embodiment of the above embodiment, the reference subcarrier spacing being predefined means that the reference subcarrier spacing is related to a frequency range (FR). As an auxiliary embodiment of the above embodiment, the reference subcarrier spacing being predefined means that the reference subcarrier spacing is related to a band index. As an auxiliary embodiment of the above embodiment, the reference subcarrier spacing being predefined means that the reference subcarrier spacing is equal to the subcarrier spacing of the initial downlink BWP (Bandwidth Part). As a subsidiary embodiment of the above embodiment, the reference subcarrier spacing is predefined, which means that the reference subcarrier spacing is equal to the subcarrier spacing of the initial uplink BWP (Bandwidth Part).

[0181] As an embodiment, the second information block indicates at least one full-duplex symbol, including: the second information block indicates at least one full-duplex symbol from a periodic time window, the periodic time window includes multiple consecutive time domain symbols, and the time length of the periodic time window is related to the period length configured in the time slot format.

[0182] As an embodiment, the second information block indicates at least one full-duplex symbol, including: the second information block indicates whether at least one symbol is applicable or associated or corresponds or targets the target sub-band from a time window, and the full-duplex symbol is a symbol that is applicable or associated or corresponds or targets the target sub-band.

[0183] As an embodiment, the second information block indicates at least one full-duplex symbol, including: the second information block includes a bitmap, any one bit in the bitmap corresponds to a time domain symbol in a periodic time window, the time domain symbol in the periodic time window corresponding to the bit with a bit value equal to "1" in the bitmap is a full-duplex symbol, and the time domain symbol in the periodic time window corresponding to the bit with a bit value equal to "0" in the bitmap is a non-full-duplex symbol. As a subsidiary embodiment of the above embodiment, the link direction of the time domain symbol in the periodic time window corresponding to the bit with a bit value equal to "0" in the bitmap is provided by tdd-UL-DL-ConfigCommon. As a subsidiary embodiment of the above embodiment, the time domain symbol in the periodic time window corresponding to the bit with a bit value equal to "0" in the bitmap is a downlink symbol or a flexible symbol. As a subsidiary embodiment of the above embodiment, any one bit in the bitmap corresponds to a time domain symbol in the periodic time window indicated as a downlink symbol or a flexible symbol by tdd-UL-DL-ConfigCommon. As a subsidiary embodiment of the above embodiment, the number of bits included in the bitmap is equal to the number of time domain symbols included in the periodic time window. As a subsidiary embodiment of the above embodiment, the number of bits included in the bitmap is equal to the number of time domain symbols corresponding to the reference subcarrier spacing included in the periodic time window, and the reference subcarrier spacing is equal to the subcarrier spacing of the uplink BWP or the downlink BWP, or the reference subcarrier spacing is equal to the subcarrier spacing adopted by the time slot format configuration. As a subsidiary embodiment of the above embodiment, the number of bits included in the bitmap is equal to a positive integer multiple of the number of time domain symbols included in the periodic time window and indicated as downlink symbols or flexible symbols by tdd-UL-DL-ConfigCommon. As a subsidiary embodiment of the above embodiment, the second information block is used to indicate at least 1 symbol per subcarrier spacing (per SCS) from the periodic time window.

[0184] As an embodiment, the second information block indicates at least one full-duplex symbol, including: the second information block includes a bitmap, any one bit in the bitmap corresponds to a time domain symbol in a periodic time window, the time domain symbol in the periodic time window corresponding to the bit with a bit value equal to "0" in the bitmap is a full-duplex symbol, and the time domain symbol in the periodic time window corresponding to the bit with a bit value equal to "1" in the bitmap is a non-full-duplex symbol. As a subsidiary embodiment of the above embodiment, the link direction of the time domain symbol in the periodic time window corresponding to the bit with a bit value equal to "1" in the bitmap is provided by tdd-UL-DL-ConfigCommon. As a subsidiary embodiment of the above embodiment, the time domain symbol in the periodic time window corresponding to the bit with a bit value equal to "1" in the bitmap is a downlink symbol or a flexible symbol. As a subsidiary embodiment of the above embodiment, any one bit in the bitmap corresponds to a time domain symbol in the periodic time window indicated as a downlink symbol or a flexible symbol by tdd-UL-DL-ConfigCommon. As a subsidiary embodiment of the above embodiment, the number of bits included in the bitmap is equal to the number of time domain symbols included in the periodic time window. As a subsidiary embodiment of the above embodiment, the number of bits included in the bitmap is equal to the number of time domain symbols corresponding to the reference subcarrier spacing included in the periodic time window, and the reference subcarrier spacing is equal to the subcarrier spacing of the uplink BWP or the downlink BWP, or the reference subcarrier spacing is equal to the subcarrier spacing adopted by the time slot format configuration. As a subsidiary embodiment of the above embodiment, the number of bits included in the bitmap is equal to a positive integer multiple of the number of time domain symbols included in the periodic time window and indicated as downlink symbols or flexible symbols by tdd-UL-DL-ConfigCommon. As a subsidiary embodiment of the above embodiment, the second information block is used to indicate at least 1 symbol per subcarrier spacing (per SCS) from the periodic time window.

[0185] As an embodiment, indicating the full-duplex symbol through a bitmap maximizes configuration flexibility.

[0186] As an embodiment, the second information block indicates at least one full-duplex symbol including: the second information block includes a SLIV, and the starting full-duplex symbol in a periodic time window and the number of consecutive symbols included are used to generate the SLIV included in the second information block.

[0187] As an embodiment, the second information block indicates that at least one full-duplex symbol includes: the second information block includes a SLIV, the starting full-duplex symbol in a periodic time window and the number of consecutive symbols included are used to generate the SLIV included in the second information block, and the symbols among the included consecutive symbols and the downlink or flexible symbols indicated by tdd-UL-DL-ConfigCommon are full-duplex symbols.

[0188] As an embodiment, the second information block indicates at least one full-duplex symbol including: the second information block includes a SLIV for a reference subcarrier spacing, the starting full-duplex symbol for the reference subcarrier spacing in a periodic time window and the number of consecutive symbols included are used to generate the SLIV included in the second information block, and the symbols overlapped with the downlink or flexible symbols indicated by tdd-UL-DL-ConfigCommon among the included consecutive symbols are full-duplex symbols. As a subsidiary embodiment of the above embodiment, the reference subcarrier spacing is equal to the subcarrier spacing of the uplink BWP or the downlink BWP, or the reference subcarrier spacing is equal to the subcarrier spacing adopted by the time slot format configuration.

[0189] As an embodiment, indicating full-duplex symbols through SLIV reduces signaling overhead while maintaining a certain degree of configuration flexibility, and is well compatible with the restriction of no more than two transition points between full-duplex symbols and non-full-duplex symbols.

[0190] As an embodiment, the first PRACH opportunity is any PRACH opportunity among the multiple PRACH opportunities that overlaps in the time domain with at least one full-duplex symbol indicated by the second information block.

[0191] As an embodiment, the first PRACH opportunity is a given PRACH opportunity among the multiple PRACH opportunities that overlaps in the time domain with at least one full-duplex symbol indicated by the second information block.

[0192] As an embodiment, the technical feature "the first PRACH opportunity overlaps in the time domain with at least one full-duplex symbol indicated by the second information block" includes: the first PRACH opportunity occupies at least one full-duplex symbol indicated by the second information block in the time domain.

[0193] As an embodiment, the technical feature "the first PRACH opportunity overlaps in the time domain between at least one full-duplex symbol indicated by the second information block and the second information block" includes: the first PRACH opportunity overlaps in the time domain between at least one full-duplex symbol indicated by tdd-UL-DL-ConfigCommon as downlink.

[0194] As an embodiment, the technical feature "the first PRACH opportunity overlaps in the time domain and at least one full-duplex symbol indicated by the second information block" includes: the first PRACH opportunity is located in the time domain in at least one full-duplex symbol indicated by the second information block and indicated as a downlink by tdd-UL-DL-ConfigCommon.

[0195] As an embodiment, the technical feature "the first PRACH opportunity overlaps in the time domain with at least one full-duplex symbol indicated by the second information block" includes: the first PRACH opportunity is located in the full-duplex symbol in the time domain.

[0196] As an embodiment, the technical feature "the first PRACH opportunity overlaps in the time domain with at least one full-duplex symbol indicated by the second information block" includes: the first PRACH opportunity completely overlaps in the time domain with at least one full-duplex symbol indicated by the second information block.

[0197] As an embodiment, the technical feature "the first PRACH opportunity overlaps in the time domain and at least one full-duplex symbol indicated by the second information block" includes: the first PRACH opportunity overlaps in full or partially in the time domain and at least one full-duplex symbol indicated by the second information block.

[0198] As an embodiment, the technical feature "there is an overlap between the first PRACH opportunity in the time domain and at least one full-duplex symbol indicated by the second information block" includes: the first PRACH opportunity includes at least one full-duplex symbol in the time domain.

[0199] As an embodiment, the technical feature "the first PRACH opportunity overlaps in the time domain and at least one full-duplex symbol indicated by the second information block" includes: the first PRACH opportunity overlaps in the time domain between the PRACH slot to which it belongs and at least one full-duplex symbol indicated by the second information block.

[0200] As an embodiment, the technical feature "the first PRACH opportunity overlaps in the time domain and between at least one full-duplex symbol indicated by the second information block" includes: the first PRACH opportunity overlaps in the time domain and between the time slot including at least one full-duplex symbol indicated by the second information block.

[0201] As an embodiment, a valid PRACH opportunity is a PRACH opportunity that can be used for PRACH transmission.

[0202] As an embodiment, a valid PRACH opportunity is a PRACH opportunity associated with a synchronized broadcast signal.

[0203] As an embodiment, a valid PRACH opportunity is a PRACH opportunity mapped by a synchronous broadcast signal.

[0204] As an embodiment, a valid PRACH opportunity is a PRACH opportunity mapped to a synchronized broadcast signal.

[0205] As an embodiment, a valid PRACH opportunity is a PRACH opportunity that can be used for uplink synchronization.

[0206] As an embodiment, the multiple PRACH opportunities include at least one valid PRACH opportunity.

[0207] As an embodiment, all PRACH opportunities included in the multiple PRACH opportunities are invalid PRACH opportunities.

[0208] As an embodiment, all PRACH opportunities included in the multiple PRACH opportunities are valid PRACH opportunities.

[0209] As an embodiment, the synchronous broadcast signal is a synchronization signal.

[0210] As an embodiment, the synchronization broadcast signal is a physical broadcast channel (PBCH).

[0211] As an embodiment, the synchronization broadcast signal includes a synchronization signal and a physical broadcast channel.

[0212] As an embodiment, the synchronization broadcast signal is a synchronization signal physical broadcast channel block (SS / PBCH block).

[0213] As an embodiment, the synchronization broadcast signal is a synchronization signal block (SSB).

[0214] As an embodiment, the synchronization broadcast signal is a 6G synchronization signal or a 6G physical broadcast channel.

[0215] As an embodiment, the technical feature of "a synchronized broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities" includes: an index or identifier of the synchronized broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities.

[0216] As an embodiment, the technical feature of "a synchronized broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities" includes: a synchronized broadcast signal is only mapped to a valid PRACH opportunity among the multiple PRACH opportunities.

[0217] As an embodiment, the technical feature of "a synchronized broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities" includes: a synchronized broadcast signal is not mapped to an invalid PRACH opportunity among the multiple PRACH opportunities.

[0218] As an embodiment, the technical feature of "the synchronous broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities" includes: the synchronous broadcast signal and the valid PRACH opportunity among the multiple PRACH opportunities are associated with each other.

[0219] As an embodiment, the technical feature of "the synchronous broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities" includes: the synchronous broadcast signal and the valid PRACH opportunities among the multiple PRACH opportunities are mapped to each other.

[0220] As an embodiment, the technical feature of "the synchronous broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities" includes: the synchronous broadcast signal and the valid PRACH opportunities among the multiple PRACH opportunities correspond to each other.

[0221] As an embodiment, the technical feature of "the synchronous broadcast signal is mapped to the valid PRACH opportunities in the multiple PRACH opportunities" includes: the synchronous broadcast signal and the valid PRACH opportunities in the multiple PRACH opportunities are mapped according to a predefined mapping rule.

[0222] As an embodiment, the technical feature of "synchronous broadcast signals are mapped to valid PRACH opportunities in the multiple PRACH opportunities" includes: the synchronous broadcast signals and the valid PRACH opportunities in the multiple PRACH opportunities are mapped in the order of first the leading index in a PRACH opportunity, then the frequency resource index of the frequency-divided PRACH opportunity, then the time domain resource index of the time-divided PRACH opportunity in a PRACH time slot, and finally the index of the PRACH time slot.

[0223] As an embodiment, the technical feature of "synchronous broadcast signals are mapped to valid PRACH opportunities among the multiple PRACH opportunities" includes: the index of the synchronous broadcast signal is mapped between the valid PRACH opportunities among the multiple PRACH opportunities in ascending order in a time window.

[0224] As an embodiment, the mapping between the synchronous broadcast signal and the valid PRACH opportunities in the multiple PRACH opportunities is used for analog beam correspondence, and the standard does not explicitly define the analog beam.

[0225] As an embodiment, the mapping between the synchronous broadcast signal and the valid PRACH opportunities in the multiple PRACH opportunities is used to associate the receiving beam and the transmitting beam, and the receiving beam and the transmitting beam are left to the implementation and are not defined by the standard.

[0226] As an embodiment, the number of valid PRACH opportunities mapped to the index of a synchronization broadcast signal is configurable or predefined.

[0227] As an embodiment, the number of indices of synchronized broadcast signals mapped to one valid PRACH opportunity is configurable or predefined.

[0228] As an embodiment, the technical feature "the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band" includes: whether the first PRACH opportunity is valid depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0229] As an embodiment, the technical feature "the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band" includes: the validity of the first PRACH opportunity is related to the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0230] As an embodiment, the technical feature "the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band" includes: the relationship between the first PRACH opportunity in the frequency domain and the target sub-band is used to determine whether the first PRACH opportunity is valid.

[0231] As an embodiment, the technical feature "the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band" includes: the validity of the first PRACH opportunity depends on whether the first PRACH opportunity belongs to the target sub-band in the frequency domain.

[0232] As an embodiment, the technical feature "the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band" includes: when the first PRACH opportunity belongs to the target sub-band in the frequency domain, the first PRACH opportunity is valid.

[0233] As an embodiment, the technical feature "the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band" includes: when the first PRACH opportunity does not belong to the target sub-band in the frequency domain, the first PRACH opportunity is invalid.

[0234] As an embodiment, the technical feature "the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band" includes: the first PRACH opportunity belonging to the target sub-band in the frequency domain is a condition for the first PRACH opportunity to be valid.

[0235] As an embodiment, the technical feature "the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band" includes: the first PRACH opportunity belonging to the target sub-band in the frequency domain is a necessary condition for the first PRACH opportunity to be valid.

[0236] As an embodiment, the technical feature "the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band" includes: the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity in the frequency domain and at least one boundary of the target sub-band is not less than a predefined or configured threshold, which is a condition for the validity of the first PRACH opportunity.

[0237] As an embodiment, the technical feature "the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band" includes: the validity of the first PRACH opportunity depends only on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0238] As an embodiment, the technical feature "the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band" includes: the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band and other conditions.

[0239] As an embodiment, the technical feature "the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band" includes: the validity of the first PRACH opportunity depends on the relative position relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0240] As an embodiment, the technical feature "the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band" includes: the validity of the first PRACH opportunity depends on whether the first PRACH opportunity belongs to the target sub-band in the frequency domain and the position of the first PRACH opportunity in the target sub-band.

[0241] As an embodiment, the conditional criteria for the first PRACH opportunity to be invalid are not defined.

[0242] As an embodiment, the standard assumes that a PRACH opportunity that does not meet the validity conditions is an invalid PRACH opportunity, and the standard does not explicitly define it.

[0243] As an embodiment, the capability indication of the user equipment supports transmission of PRACH in full-duplex symbols.

[0244] As an embodiment, the capability of the user equipment indicates whether SBFD is supported.

[0245] As an embodiment, the capability indication of the user equipment supporting the transmission of the PRACH in the full-duplex symbol depends on whether the capability indication of the user equipment supports SBFD.

[0246] Example 2

[0247] Embodiment 2 illustrates a schematic diagram of a network architecture according to the present application, as shown in FIG2 . FIG2 illustrates a network architecture 200 for 5G NR, LTE (Long-Term Evolution), and LTE-A (Long-Term Evolution Advanced) systems. The 5G NR or LTE network architecture 200 may be referred to as a 5G System (5G System) / EPS (Evolved Packet System) 200 or some other suitable terminology. The 5GS / EPS 200 may include one or more UEs (User Equipment) 201, an NG-RAN (Next Generation Radio Access Network) 202, a 5G Core Network (5G Core Network) / EPC (Evolved Packet Core) 210, an HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and Internet services 230. The 5GS / EPS may interconnect with other access networks, but for simplicity, these entities / interfaces are not shown. As shown, the 5GS / EPS provides packet-switched services. However, those skilled in the art will readily appreciate that the various concepts presented throughout this disclosure can be extended to networks providing circuit-switched services or other cellular networks. The NG-RAN includes NR / evolved Node B (gNB / eNB) 203 and other gNBs (eNBs) 204. The gNB (eNB) 203 provides user and control plane protocol termination towards the UE 201. The gNB (eNB) 203 can be connected to other gNBs (eNBs) 204 via an Xn / X2 interface (e.g., backhaul). The gNB (eNB) 203 may also be referred to as a base station, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), TRP (transmitter receive node), or some other appropriate terminology. The gNB (eNB) 203 provides an access point to the 5GC / EPC 210 for the UE 201. Examples of UE 201 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop computer, a personal digital assistant (PDA), a satellite radio, non-terrestrial base station communications, satellite mobile communications, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a drone, an aircraft, a narrowband Internet of Things device, a machine type communication device, a land vehicle, an automobile, a wearable device, a test device, a test instrument, a test tool, or any other similarly functional device.Those skilled in the art may also refer to the UE 201 as a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology. The gNB (eNB) 203 is connected to the 5GC / EPC 210 via the S1 / NG interface. The 5GC / EPC 210 includes an MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MMEs / AMFs / SMFs 214, an S-GW (Service Gateway) / UPF (User Plane Function) 212, and a P-GW (Packet Data Network Gateway) / UPF 213. MME / AMF / SMF211 is the control node that handles signaling between UE201 and 5GC / EPC210. ​​Generally, MME / AMF / SMF211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through S-GW / UPF212, which itself is connected to P-GW / UPF213. P-GW provides UE IP address allocation and other functions. P-GW / UPF213 is connected to Internet services 230. Internet services 230 include operator-specific Internet protocol services, which may specifically include the Internet, intranet, IMS (IP Multimedia Subsystem) and packet-switched streaming services.

[0248] As an embodiment, the UE201 corresponds to the first node device in this application.

[0249] As an embodiment, the UE 201 supports transmission in a flexible duplex mode.

[0250] As an embodiment, the gNB (eNB) 201 corresponds to the second node device in this application.

[0251] As an embodiment, the gNB (eNB) 201 supports transmission in flexible duplex mode.

[0252] Example 3

[0253] Embodiment 3 illustrates a schematic diagram of an embodiment of a radio protocol architecture for a user plane and a control plane according to the present application, as shown in FIG3 . FIG3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300. FIG3 illustrates the radio protocol architecture of the control plane 300 for a first node device (UE or gNB) and a second node device (gNB or UE) using three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY 301. Layer 2 (L2 layer) 305 is above PHY 301 and is responsible for the link between the first node device and the second node device via PHY 301. L2 layer 305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304. These sublayers terminate at the second node device. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security by encrypting data packets, and provides support for inter-zone mobility of the first node device between the second node devices. The RLC sublayer 303 provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets, and reordering of data packets to compensate for out-of-order reception due to HARQ. The MAC sublayer 302 provides multiplexing between logical and transport channels. The MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) in a cell between the first node devices. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3 layer) in the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the second node device and the first node device. The radio protocol architecture of the user plane 350 includes layer 1 (L1 layer) and layer 2 (L2 layer). The radio protocol architecture for the first node device and the second node device in the user plane 350 is substantially the same as the corresponding layers and sublayers in the control plane 300 for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead.The L2 layer 355 in the user plane 350 also includes an SDAP (Service Data Adaptation Protocol) sublayer 356. The SDAP sublayer 356 is responsible for mapping between QoS flows and data radio bearers (DRBs) to support service diversity. Although not shown, the first node device may have several upper layers above the L2 layer 355, including a network layer (e.g., an IP layer) terminated at the P-GW on the network side and an application layer terminated at the other end of the connection (e.g., a remote UE, a server, etc.).

[0254] As an embodiment, the wireless protocol architecture in FIG3 is applicable to the first node device in this application.

[0255] As an embodiment, the wireless protocol architecture in FIG3 is applicable to the second node device in this application.

[0256] As an embodiment, the first information block in the present application is generated in the RRC306, or MAC302, or MAC352, or the PHY301, or PHY351.

[0257] As an embodiment, the second information block in the present application is generated in the RRC306, or MAC302, or MAC352, or the PHY301, or PHY351.

[0258] Example 4

[0259] Example 4 shows a schematic diagram of a first node device and a second node device according to an embodiment of the present application, as shown in FIG4 .

[0260] The first node device (450) may include a controller / processor 490, a data source / buffer 480, a receiving processor 452, a transmitter / receiver 456 and a transmitting processor 455, and the transmitter / receiver 456 includes an antenna 460.

[0261] The second node device ( 410 ) may include a controller / processor 440 , a data source / buffer 430 , a receiving processor 412 , a transmitter / receiver 416 and a transmitting processor 415 , wherein the transmitter / receiver 416 includes an antenna 420 .

[0262] In DL (Downlink), upper layer packets are provided to the controller / processor 440. The controller / processor 440 implements the functions of the L2 layer and above. In DL, the controller / processor 440 provides packet header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first node device 450 based on various priority metrics. The controller / processor 440 is also responsible for HARQ operations, retransmission of lost packets, and high-layer signaling to the first node device 450. The high-layer information carried by the first information block and the second information block in this application is generated by the controller / processor 440. The transmit processor 415 implements various signal processing functions for the L1 layer (i.e., the physical layer), including coding, interleaving, scrambling, modulation, power control / allocation, precoding, and physical layer control signaling generation. For example, the physical layer signal carrying the first information block and the physical layer signal carrying the second information block are completed by the transmit processor 415. The generated modulated symbols are divided into parallel streams, and each stream is mapped to a corresponding multi-carrier subcarrier and / or multi-carrier symbol. The symbols are then mapped by the transmit processor 415 to the antenna 420 via the transmitter 416 and transmitted in the form of RF signals. At the receiving end, each receiver 456 receives the RF signal via its corresponding antenna 460, recovers the baseband information modulated onto the RF carrier, and provides the baseband information to the receive processor 452. The receive processor 452 implements various L1 layer signal reception processing functions. These signal reception processing functions include receiving physical layer signals carrying the first information block and the second information block, demodulating the multi-carrier symbols in the multi-carrier symbol stream based on various modulation schemes (e.g., binary phase shift keying (BPSK) and quadrature phase shift keying (QPSK)), performing descrambling, decoding, and deinterleaving to recover the data or control signals transmitted by the second node device 410 on the physical channel, and then providing the data and control signals to the controller / processor 490. Controller / processor 490 is responsible for L2 and above layers. It interprets high-level information, including the high-level information carried in the first and second information blocks. The controller / processor may be associated with memory 480, which stores program code and data. Memory 480 may be referred to as a computer-readable medium.

[0263] During uplink (UL) transmission, similar to downlink transmission, higher-layer information generated by controller / processor 490 is processed by transmit processor 455 to perform various signal transmission processing functions for the L1 layer (i.e., physical layer). Transmit processor 455 then maps the information to antenna 460 via transmitter 456 and transmits it in the form of RF signals. Receivers 416 receive the RF signals via their respective antennas 420. Each receiver 416 recovers the baseband information modulated onto the RF carrier and provides the baseband information to receive processor 412. Receive processor 412 performs various signal reception processing functions for the L1 layer (i.e., physical layer) and then provides data and / or control signals to controller / processor 440. Controller / processor 440 performs L2 layer functions, including interpreting higher-layer information. The controller / processor may be associated with a buffer 430 that stores program code and data. Buffer 430 may be a computer-readable medium.

[0264] As an embodiment, the first node device 450 apparatus includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor, and the first node device 450 apparatus at least: receives a first information block, the first information block indicates a plurality of PRACH opportunities; receives a second information block, the second information block indicates a target sub-band and at least one full-duplex symbol; wherein the first PRACH opportunity is one of the plurality of PRACH opportunities indicated by the first information block, and the first PRACH opportunity overlaps in the time domain with the at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the plurality of PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0265] As an embodiment, the first node device 450 apparatus includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generating an action when executed by at least one processor, the action including: receiving a first information block, the first information block indicating a plurality of PRACH opportunities; receiving a second information block, the second information block indicating a target sub-band and at least one full-duplex symbol; wherein the first PRACH opportunity is one of the plurality of PRACH opportunities indicated by the first information block, the first PRACH opportunity overlapping in the time domain with the at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the plurality of PRACH opportunities, the validity of the first PRACH opportunity depending on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0266] As an embodiment, the second node device 410 apparatus includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor. The second node device 410 apparatus at least: sends a first information block, the first information block indicating a plurality of PRACH opportunities; sends a second information block, the second information block indicating a target sub-band and at least one full-duplex symbol; wherein the first PRACH opportunity is one of the plurality of PRACH opportunities indicated by the first information block, the first PRACH opportunity overlaps in the time domain with the at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the plurality of PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0267] As an embodiment, the second node device 410 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generating an action when executed by at least one processor, the action including: sending a first information block, the first information block indicating a plurality of PRACH opportunities; sending a second information block, the second information block indicating a target sub-band and at least one full-duplex symbol; wherein the first PRACH opportunity is one of the plurality of PRACH opportunities indicated by the first information block, and the first PRACH opportunity overlaps in the time domain with the at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the plurality of PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0268] As an embodiment, the first node device 450 is a user equipment (UE).

[0269] As an embodiment, the first node device 450 is a user equipment supporting flexible duplex mode transmission.

[0270] As an embodiment, the second node device 410 is a base station device (gNB / eNB).

[0271] As an embodiment, the second node device 410 is a base station device that supports flexible duplex mode transmission.

[0272] As an embodiment, the receiver 456 (including the antenna 460 ), the receiving processor 452 , and the controller / processor 490 are used to receive the first information block in this application.

[0273] As an embodiment, the receiver 456 (including the antenna 460 ), the receiving processor 452 , and the controller / processor 490 are configured to receive the second information block in the present application.

[0274] As an embodiment, the transmitter 416 (including the antenna 420), the transmit processor 415 and the controller / processor 440 are used to transmit the first information block in this application.

[0275] As an embodiment, the transmitter 416 (including the antenna 420), the transmit processor 415 and the controller / processor 440 are used to transmit the second information block in this application.

[0276] Example 5

[0277] Example 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in FIG5 . In FIG5 , the second node device N500 is the base station maintaining the serving cell of the first node device U550 . It should be noted that the sequence in this example does not limit the signal transmission sequence and implementation order in this application.

[0278] For the second node device N500, the first information block is sent in step S501, and the second information block is sent in step S502;

[0279] For the first node device U550, the first information block is received in step S551, and the second information block is received in step S552.

[0280] In embodiment 5, the first information block indicates multiple PRACH opportunities; the second information block indicates a target sub-band and at least one full-duplex symbol; wherein the first PRACH opportunity is one of the multiple PRACH opportunities indicated by the first information block, and the first PRACH opportunity overlaps in the time domain with at least one full-duplex symbol indicated by the second information block; the synchronized broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0281] Example 6

[0282] Example 6 illustrates a schematic diagram of the first threshold according to an embodiment of the present application, as shown in Figure 6. In Figure 6, the wireless charging rectangle in each case represents a time slot, "DL" represents that the symbol in the time slot is a downlink symbol that is not configured with a full-duplex symbol, "UL" represents that the symbol in the time slot is an uplink symbol, "FD" represents that the symbol in the time slot is a full-duplex symbol, and the small rectangle filled with gray represents a valid PRACH opportunity; in case A, the first threshold represents the threshold of the interval length from the downlink symbol to the full-duplex symbol, in case B, the first threshold represents the threshold of the interval length from the uplink symbol to the full-duplex symbol, in case C, the first threshold represents the threshold of the interval length from the full-duplex symbol to the uplink symbol, and in case D, the first threshold represents the threshold of the interval length from the full-duplex symbol to the downlink symbol.

[0283] In embodiment 6, the effectiveness of the first PRACH opportunity in the present application also depends on the relationship between the interval length of the first PRACH opportunity in the time domain and between adjacent non-full-duplex symbols and a first threshold, wherein the first threshold is configured or predefined and / or related to the user equipment capability.

[0284] As an embodiment, the conversion delay between full-duplex time domain symbols and non-full-duplex time domain symbols is considered when judging the validity of a PRACH opportunity, thereby improving the probability of successful PRACH transmission while taking into account implementation limitations, thereby reducing the implementation complexity of transmitting PRACH on full-duplex time domain symbols.

[0285] As an embodiment, the interval length between the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol is the interval length between the start of the first PRACH opportunity in the time domain and the start of the adjacent non-full-duplex symbol.

[0286] As an embodiment, the interval length between the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol is the interval length between the start of the first PRACH opportunity in the time domain and the end of the adjacent non-full-duplex symbol.

[0287] As an embodiment, the interval length between the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol is the interval length between the end of the first PRACH opportunity in the time domain and the start of the adjacent non-full-duplex symbol.

[0288] As an embodiment, the interval length between the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol is the interval length between the end of the first PRACH opportunity in the time domain and the end of the adjacent non-full-duplex symbol.

[0289] As an embodiment, the interval length between the first PRACH opportunity in the time domain and an adjacent non-full-duplex symbol is the interval length between the first PRACH opportunity in the time domain and an adjacent non-full-duplex symbol.

[0290] As an embodiment, the interval length between the first PRACH opportunity in the time domain and an adjacent non-full-duplex symbol is the interval length between the first PRACH opportunity in the time domain and any adjacent non-full-duplex symbol.

[0291] As an embodiment, the interval length between the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol is the interval length between the PRACH time slot to which the first PRACH opportunity belongs in the time domain and the adjacent non-full-duplex symbol.

[0292] As an embodiment, the interval length between the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol is the interval length between the overlapping time slot of the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol.

[0293] In one embodiment, the interval length between the first PRACH opportunity and an adjacent non-full-duplex symbol in the time domain is the interval length between the start of the first PRACH opportunity and the last non-full-duplex symbol in the time domain. As a subsidiary embodiment of the above embodiment, the interval length between the first PRACH opportunity and the last non-full-duplex symbol is considered to meet the transmission delay requirements of different coverage areas while ensuring the transition time between non-full-duplex symbols and full-duplex symbols.

[0294] In one embodiment, the interval length between the first PRACH opportunity and an adjacent non-full-duplex symbol in the time domain is the interval length between the end of the first PRACH opportunity and the next non-full-duplex symbol in the time domain. As a subsidiary embodiment of the above embodiment, considering the interval length between the next non-full-duplex symbol ensures the transition time between full-duplex symbols and non-full-duplex symbols, thereby reducing implementation complexity.

[0295] As an embodiment, the interval length between the first PRACH opportunity and adjacent non-full-duplex symbols in the time domain is expressed in absolute time length.

[0296] As an embodiment, the interval length between the first PRACH opportunity and adjacent non-full-duplex symbols in the time domain is expressed in the number of symbols.

[0297] As an embodiment, the interval length between the first PRACH opportunity and adjacent non-full-duplex symbols in the time domain is expressed as the number of symbols corresponding to the subcarrier spacing of the preamble.

[0298] As an embodiment, the interval length between the first PRACH opportunity and adjacent non-full-duplex symbols in the time domain is expressed as the number of symbols corresponding to the subcarrier spacing of the active uplink BWP.

[0299] As an embodiment, the adjacent non-full-duplex symbol is the previous non-full-duplex symbol.

[0300] As an embodiment, the adjacent non-full-duplex symbol is the next non-full-duplex symbol.

[0301] As an embodiment, the adjacent non-full-duplex symbol is a previous non-full-duplex symbol that is closest to the adjacent non-full-duplex symbol.

[0302] As an embodiment, the adjacent non-full-duplex symbol is a non-full-duplex symbol closest to the next symbol.

[0303] As an embodiment, the adjacent non-full-duplex symbol is the previous or next downlink symbol.

[0304] As an embodiment, the adjacent non-full-duplex symbol is a downlink symbol indicated by the previous or next tdd-UL-DL-ConfigCommon.

[0305] As an embodiment, the adjacent non-full-duplex symbol is the previous or next downlink symbol that is not indicated as a full-duplex symbol.

[0306] As an embodiment, the adjacent non-full-duplex symbol is a previous or next downlink symbol indicated by tdd-UL-DL-ConfigCommon that is not indicated as a full-duplex symbol.

[0307] As an embodiment, the adjacent non-full-duplex symbol is the previous or next uplink symbol.

[0308] As an embodiment, the adjacent non-full-duplex symbol is an uplink symbol indicated by the previous or next tdd-UL-DL-ConfigCommon.

[0309] As an embodiment, the first threshold is a non-negative integer.

[0310] As an embodiment, the first threshold may be a non-integer.

[0311] As an embodiment, the unit of the first threshold is seconds or milliseconds.

[0312] As an embodiment, the first threshold represents the number of symbols.

[0313] As an embodiment, the technical feature "the validity of the first PRACH opportunity also depends on the relationship between the interval length of the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbols and the first threshold" includes: the validity of the first PRACH opportunity also depends on the size relationship between the interval length of the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbols and the first threshold.

[0314] As an embodiment, the technical feature "the validity of the first PRACH opportunity also depends on the relationship between the interval length of the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbols and the first threshold" includes: the size relationship between the interval length of the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbols and the first threshold is used to determine or judge whether the first PRACH opportunity is valid.

[0315] As an embodiment, the technical feature "the validity of the first PRACH opportunity also depends on the relationship between the interval length of the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbols and the first threshold" includes: the condition that the first PRACH opportunity is valid also includes that the interval length between the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbols is not less than (or greater than) the first threshold.

[0316] As an embodiment, the technical feature "the validity of the first PRACH opportunity also depends on the relationship between the interval length between the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol and the first threshold" includes: the validity of the first PRACH opportunity also depends on the start of the first PRACH opportunity in the time domain being N1 symbols later than the adjacent non-full-duplex symbol, where N1 is the first threshold.

[0317] As an embodiment, the technical feature "the validity of the first PRACH opportunity also depends on the relationship between the interval length of the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol and the first threshold" includes: the validity of the first PRACH opportunity also depends on the cutoff of the first PRACH opportunity in the time domain being N2 symbols earlier than the adjacent non-full-duplex symbol, where N2 is the first threshold.

[0318] As an embodiment, the technical feature "the validity of the first PRACH opportunity also depends on the relationship between the interval length of the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol and the first threshold" includes: when the first PRACH opportunity belongs to the target sub-band in the frequency domain and the start of the first PRACH opportunity in the time domain is N1 symbols later than the adjacent non-full-duplex symbol, the first PRACH opportunity is valid, and N1 is the first threshold.

[0319] As an embodiment, the technical feature "the validity of the first PRACH opportunity also depends on the relationship between the interval length of the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol and the first threshold" includes: when the first PRACH opportunity belongs to the target sub-band in the frequency domain and the end of the first PRACH opportunity in the time domain is N2 symbols earlier than the adjacent non-full-duplex symbol, the first PRACH opportunity is valid, and N2 is the first threshold.

[0320] As an embodiment, the technical feature "the validity of the first PRACH opportunity also depends on the relationship between the length of the interval between the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol and the first threshold" includes: when the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity in the frequency domain and at least one boundary of the target sub-band is not less than a configured or predefined threshold and the start of the first PRACH opportunity in the time domain is N1 symbols later than the adjacent non-full-duplex symbol, the first PRACH opportunity is valid, and N1 is the first threshold.

[0321] As an embodiment, the technical feature "the validity of the first PRACH opportunity also depends on the relationship between the length of the interval between the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol and the first threshold" includes: when the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity in the frequency domain and at least one boundary of the target sub-band is not less than a configured or predefined threshold and the end of the first PRACH opportunity in the time domain is N2 symbols earlier than the adjacent non-full-duplex symbol, the first PRACH opportunity is valid, and N2 is the first threshold.

[0322] As an embodiment, the technical feature "the validity of the first PRACH opportunity also depends on the relationship between the interval length of the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol and the first threshold" includes: when the first PRACH opportunity belongs to the target sub-band in the frequency domain and the start of the first PRACH opportunity in the time domain is N1 symbols later than the adjacent non-full-duplex symbol and the end of the first PRACH opportunity in the time domain is N2 symbols earlier than the adjacent non-full-duplex symbol, the first PRACH opportunity is valid, N1 or N2 is the first threshold, N1 is a non-negative integer, and N2 is a non-negative integer.

[0323] As an embodiment, the technical feature "the validity of the first PRACH opportunity also depends on the relationship between the length of the interval between the first PRACH opportunity in the time domain and the adjacent non-full-duplex symbol and the first threshold" includes: when the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity in the frequency domain and at least one boundary of the target sub-band is not less than a configured or predefined threshold and the start of the first PRACH opportunity in the time domain is N1 symbols later than the adjacent non-full-duplex symbol and the end of the first PRACH opportunity in the time domain is N2 symbols earlier than the adjacent non-full-duplex symbol, the first PRACH opportunity is valid, N1 or N2 is the first threshold, N1 is a non-negative integer, and N2 is a non-negative integer.

[0324] As an embodiment, the first threshold is configured or predefined.

[0325] As an embodiment, the first threshold is related to the user equipment capability

[0326] As an embodiment, the first threshold is configured and is related to the user equipment capability.

[0327] As an embodiment, the first threshold is configured including: higher layer signaling or higher layer parameters indicating the first threshold.

[0328] As an embodiment, the first threshold is configured including: the first threshold depends on higher layer signaling or higher layer parameters.

[0329] As an embodiment, the first threshold is configured to include: the first threshold depends on the subcarrier spacing, and higher layer signaling or higher layer parameters indicate the subcarrier spacing on which the first threshold depends.

[0330] As an embodiment, the first threshold is configured to include: higher layer signaling or higher layer parameters indicating whether the first threshold is equal to the value reported by the user equipment capability.

[0331] As an embodiment, the first threshold is configured to include: higher layer signaling or higher layer parameters indicating an offset value between the first threshold and a value reported by the user equipment capability.

[0332] As an embodiment, the first threshold is configured to include: a parameter for calculating the first threshold includes a first parameter value, and a higher layer signaling or a higher layer parameter indicates the first parameter value.

[0333] As an embodiment, the first threshold is configured to include: the first threshold is linearly related to a first parameter value, and a higher layer signaling or a higher layer parameter indicates the first parameter value.

[0334] As an embodiment, the first threshold being predefined includes: the first threshold being fixed.

[0335] As an embodiment, the first threshold being predefined includes: the first threshold being hard coded in the standard.

[0336] As an embodiment, the first threshold being predefined includes: a relationship between the first threshold and a value of another parameter is fixed.

[0337] As an embodiment, the first threshold being predefined includes: the corresponding relationship between the first threshold and the subcarrier spacing is fixed.

[0338] As an embodiment, the first threshold is predefined, including: a parameter for calculating the first threshold includes a first parameter value, and the first parameter value is a fixed value.

[0339] As an embodiment, the first threshold value is related to the user equipment capability, including: the first threshold value is equal to the value reported by the user equipment capability.

[0340] As an embodiment, the first threshold value is related to the user equipment capability and includes: the first threshold value is not less than the value reported by the user equipment capability.

[0341] As an embodiment, the first threshold is related to the user equipment capability and includes: a parameter for calculating the first threshold includes a first parameter value, and the first parameter value is equal to a value reported by the user equipment capability.

[0342] As an embodiment, the first threshold value is related to the user equipment capability, including: the first threshold value is linearly correlated with a first parameter value, and the first parameter value is equal to the value reported by the user equipment capability.

[0343] As an embodiment, the first threshold is related to the user equipment capability and depends on whether the user equipment capability supports SBFD or whether the user equipment capability supports transmission of PRACH in downlink full-duplex symbols.

[0344] As an embodiment, the network configures the first threshold to take into account the conversion delay between different hardware or algorithm implementations when processing full-duplex symbols and non-full-duplex symbols on the network side, thereby ensuring effective operation of network self-interference cancellation.

[0345] As an embodiment, the predefined first threshold may support setting a fixed relatively large threshold, thereby simplifying the design while ensuring that the conversion and processing delays on the network and user sides are met.

[0346] As an embodiment, associating the first threshold with the user equipment capability can ensure that the conversion and processing delay of the user equipment are met, thereby reducing the implementation complexity of the user equipment.

[0347] As an embodiment, the first threshold is associated with the user equipment capability and is configured by the network at the same time so as to optimize the setting of the first threshold while taking into account different network side implementations while ensuring that the conversion and processing delays of the user equipment are met, thereby avoiding accidental damage to valid PRACH opportunities and improving the capacity of PRACH.

[0348] As an embodiment, the first threshold is equal to the larger value compared between the first candidate interval and the second candidate interval, the first candidate interval is configured or related to the subcarrier spacing of the random access preamble, and the second candidate interval is related to the user equipment capability.

[0349] As an embodiment, the first threshold is equal to N gap The larger value compared with the first ability value, N gap It is related to the subcarrier spacing of the random access preamble, and the first capability value is related to the user equipment capability.

[0350] Example 7

[0351] Embodiment 7 illustrates a schematic diagram of a second threshold according to an embodiment of the present application, as shown in FIG7. In FIG7, the vertical axis represents frequency, the thick-line rectangle represents the target sub-band, the rectangle filled with diagonal lines represents a valid PRACH opportunity, and the second threshold represents the threshold of the frequency interval from the boundary of the target sub-band to the target sub-band.

[0352] In Example 7, the first PRACH opportunity in the present application belongs to the target sub-band in the present application in the frequency domain and the frequency domain interval between the first PRACH opportunity and at least one boundary of the target sub-band in the frequency domain is not less than a second threshold. This is a condition for the validity of the first PRACH opportunity, and the second threshold is predefined or configured.

[0353] As an embodiment, the impact of self-interference on adjacent frequency bands is considered when determining the validity of a PRACH opportunity, thereby ensuring effective transmission of the PRACH and improving random access performance.

[0354] As an embodiment, the first PRACH opportunity belonging to the target sub-band in the frequency domain includes: all frequency domain resources occupied by the first PRACH opportunity are located in the target sub-band.

[0355] As an embodiment, the first PRACH opportunity belonging to the target sub-band in the frequency domain includes: the target sub-band includes all frequency domain resources occupied by the first PRACH opportunity.

[0356] As an embodiment, the frequency domain interval between the first PRACH opportunity in the frequency domain and at least one boundary of the target sub-band is the frequency domain interval between the lowest frequency (or the lowest indexed subcarrier) of the first PRACH opportunity and at least one boundary of the target sub-band.

[0357] As an embodiment, the frequency domain interval between the first PRACH opportunity in the frequency domain and at least one boundary of the target sub-band is the frequency domain interval between the highest frequency (or the highest indexed subcarrier) of the first PRACH opportunity and at least one boundary of the target sub-band.

[0358] As an embodiment, the frequency domain interval between the first PRACH opportunity in the frequency domain and at least one boundary of the target sub-band is the frequency domain interval between the lowest frequency (or the lowest indexed sub-carrier) of the first PRACH opportunity and the lowest frequency (or the included lowest indexed sub-carrier) of the target sub-band.

[0359] As an embodiment, the frequency domain interval between the first PRACH opportunity in the frequency domain and at least one boundary of the target sub-band is the frequency domain interval between the highest frequency (or the highest indexed sub-carrier) of the first PRACH opportunity and the highest frequency (or the highest indexed sub-carrier included) of the target sub-band.

[0360] As an embodiment, the frequency domain interval of the first PRACH opportunity between the frequency domain and at least one boundary of the target sub-band includes the frequency domain interval between the lowest frequency (or the lowest indexed subcarrier) of the first PRACH opportunity and the lowest frequency (or the included lowest indexed subcarrier) of the target sub-band and the frequency domain interval between the highest frequency (or the highest indexed subcarrier) of the first PRACH opportunity and the highest frequency (or the included highest indexed subcarrier) of the target sub-band.

[0361] As an embodiment, the second threshold is a non-negative integer.

[0362] As an embodiment, the second threshold may be a non-integer.

[0363] As an embodiment, the unit of the second threshold is Hertz or kilohertz.

[0364] As an embodiment, the second threshold represents the number of subcarriers.

[0365] As an embodiment, the frequency domain interval of the first PRACH opportunity between the frequency domain and at least one boundary of the target sub-band is not less than the second threshold, which includes: the frequency domain interval of the first PRACH opportunity between the frequency domain and at least one boundary of the target sub-band is greater than the second threshold.

[0366] As an embodiment, the frequency domain interval of the first PRACH opportunity between the frequency domain and at least one boundary of the target sub-band is not less than the second threshold, which includes: the frequency domain interval of the first PRACH opportunity between the frequency domain and at least one boundary of the target sub-band is greater than or equal to the second threshold.

[0367] As an embodiment, the frequency domain interval between the first PRACH opportunity in the frequency domain and at least one boundary of the target sub-band is not less than a second threshold, including: the frequency domain interval between all frequency resources (or all subcarriers) included in the frequency domain of the first PRACH opportunity and the lowest frequency (or the lowest indexed subcarrier included) of the target sub-band is not less than the second threshold.

[0368] As an embodiment, the frequency domain interval between the first PRACH opportunity in the frequency domain and at least one boundary of the target sub-band is not less than a second threshold, including: the frequency domain interval between all frequency resources (or all subcarriers) included in the frequency domain of the first PRACH opportunity and the highest frequency (or the highest indexed subcarrier included) of the target sub-band is not less than the second threshold.

[0369] As an embodiment, the frequency domain interval of the first PRACH opportunity between the frequency domain and at least one boundary of the target sub-band is not less than the second threshold, including: the frequency domain interval between all frequency resources (or all sub-carriers) included in the frequency domain of the first PRACH opportunity and the lowest frequency of the target sub-band (or the lowest indexed sub-carrier included) is not less than the second threshold; the frequency domain interval between all frequency resources (or all sub-carriers) included in the frequency domain of the first PRACH opportunity and the highest frequency (or the highest indexed sub-carrier included) of the target sub-band is not less than the second threshold.

[0370] As an embodiment, the frequency domain interval between the first PRACH opportunity in the frequency domain and at least one boundary of the target sub-band is not less than the second threshold, including: the frequency domain interval between the highest frequency (or the highest indexed sub-carrier) of the first PRACH opportunity and the highest frequency (or the included highest indexed sub-carrier) of the target sub-band is not less than the second threshold; the frequency domain interval between the lowest frequency (or the lowest indexed sub-carrier) of the first PRACH opportunity and the lowest frequency (or the included lowest indexed sub-carrier) of the target sub-band is not less than the second threshold.

[0371] As an embodiment, the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity and at least one boundary of the target sub-band in the frequency domain is not less than the second threshold, which are conditions for the validity of the first PRACH opportunity. The conditions include: the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity and at least one boundary of the target sub-band in the frequency domain is not less than the second threshold, which are necessary conditions for the validity of the first PRACH opportunity.

[0372] As an embodiment, the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity and at least one boundary of the target sub-band in the frequency domain is not less than a second threshold. The conditions for the validity of the first PRACH opportunity include: the conditions for the validity of the first PRACH opportunity include that the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity and at least one boundary of the target sub-band in the frequency domain is not less than a second threshold.

[0373] As an embodiment, the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity in the frequency domain and at least one boundary of the target sub-band is not less than a second threshold. The conditions for the validity of the first PRACH opportunity include: the validity of the first PRACH opportunity depends on the first PRACH opportunity belonging to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity in the frequency domain and at least one boundary of the target sub-band is not less than the second threshold.

[0374] As an embodiment, the conditions for the validity of the first PRACH opportunity include: when the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity in the frequency domain and at least one boundary of the target sub-band is not less than the second threshold, the first PRACH opportunity is valid.

[0375] As an embodiment, the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity and at least one boundary of the target sub-band in the frequency domain is not less than a second threshold. The conditions for the validity of the first PRACH opportunity include: the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity and at least one boundary of the target sub-band in the frequency domain is not less than the second threshold. The second threshold is used to determine that the first PRACH opportunity is valid.

[0376] As an embodiment, the second threshold is configured including: higher layer signaling or higher layer parameters indicating the second threshold.

[0377] As an embodiment, the second threshold is configured including: the second threshold depends on higher layer signaling or higher layer parameters.

[0378] As an embodiment, the second threshold is configured to include: the second threshold depends on the subcarrier spacing, and higher layer signaling or higher layer parameters indicate the subcarrier spacing on which the second threshold depends.

[0379] As an embodiment, the second threshold is configured to include: parameters for calculating the second threshold include a second parameter value, and higher layer signaling or higher layer parameters indicate the second parameter value.

[0380] As an embodiment, the second threshold being predefined includes: the second threshold being fixed.

[0381] As an embodiment, the second threshold being predefined includes: the second threshold being hard coded in the standard.

[0382] As an embodiment, the second threshold being predefined includes: a relationship between the second threshold and a value of another parameter is fixed.

[0383] As an embodiment, the second threshold being predefined includes: the corresponding relationship between the second threshold and the subcarrier spacing is fixed.

[0384] As an embodiment, the second threshold is predefined, including: a parameter for calculating the second threshold includes a second parameter value, and the second parameter value is a fixed value.

[0385] As an embodiment, the second threshold is related to the subcarrier spacing of the leading edge.

[0386] As an embodiment, the second threshold is related to the subcarrier spacing of the target sub-band.

[0387] As an embodiment, the second threshold is related to the subcarrier spacing of the BWP.

[0388] As an embodiment, the second threshold and the subcarrier spacing of the leading element are all related to the subcarrier spacing of the target sub-band.

[0389] Example 8

[0390] Embodiment 8 illustrates a schematic diagram of multiple PRACH opportunities according to an embodiment of the present application, as shown in FIG8. In FIG8, the horizontal axis represents time, the vertical axis represents frequency, each rectangle represents one of the multiple PRACH opportunities, each rectangle filled with slashes represents a valid PRACH opportunity, "DL" represents a downlink symbol (Downlink) that is not configured with a full-duplex symbol, "UL" represents an uplink symbol (Uplink), "FD" represents a full-duplex symbol (Full duplex), and "FL" represents a flexible symbol (Flexible).

[0391] In embodiment 8, any valid PRACH opportunity among the multiple PRACH opportunities in the present application is located in an uplink symbol in the time domain, or in a full-duplex symbol in the time domain, or in a flexible symbol in the time domain.

[0392] As an embodiment, any valid PRACH opportunity among the multiple PRACH opportunities cannot be located in a downlink symbol that is not configured as a full-duplex symbol.

[0393] As an embodiment, any valid PRACH opportunity among the multiple PRACH opportunities cannot be located in a downlink symbol indicated by tdd-UL-DL-ConfigCommon that is not configured as a full-duplex symbol by the second information block.

[0394] As an embodiment, any valid PRACH opportunity among the multiple PRACH opportunities cannot overlap with a downlink symbol that is not configured as a full-duplex symbol.

[0395] As an embodiment, any PRACH opportunity among the multiple PRACH opportunities that overlaps with a downlink symbol that is not configured as a full-duplex symbol is invalid.

[0396] As an embodiment, any one valid PRACH opportunity among the multiple PRACH opportunities is located in an uplink symbol in the time domain includes: any one valid PRACH opportunity among the multiple PRACH opportunities is all located in an uplink symbol in the time domain.

[0397] As an embodiment, any valid PRACH opportunity among the multiple PRACH opportunities is located in the uplink symbol in the time domain, including: any valid PRACH opportunity among the multiple PRACH opportunities all overlap with the uplink symbol in the time domain.

[0398] As an embodiment, any one valid PRACH opportunity among the multiple PRACH opportunities is located in an uplink symbol in the time domain, including: any one valid PRACH opportunity among the multiple PRACH opportunities is all located in the uplink symbol indicated by tdd-UL-DL-ConfigCommon in the time domain.

[0399] As an embodiment, any one valid PRACH opportunity among the multiple PRACH opportunities is located in a full-duplex symbol in the time domain includes: any one valid PRACH opportunity among the multiple PRACH opportunities is all located in a full-duplex symbol in the time domain.

[0400] As an embodiment, any valid PRACH opportunity among the multiple PRACH opportunities is located in a full-duplex symbol in the time domain, including: any valid PRACH opportunity among the multiple PRACH opportunities overlaps with the full-duplex symbol in the time domain.

[0401] As an embodiment, any valid PRACH opportunity among the multiple PRACH opportunities being located in a full-duplex symbol in the time domain includes: any valid PRACH opportunity among the multiple PRACH opportunities being located in the full-duplex symbol indicated by the second information block in the time domain.

[0402] As an embodiment, any one valid PRACH opportunity among the multiple PRACH opportunities is located in a flexible symbol in the time domain includes: any one valid PRACH opportunity among the multiple PRACH opportunities is all located in a flexible symbol in the time domain.

[0403] As an embodiment, any valid PRACH opportunity among the multiple PRACH opportunities is located in a flexible symbol in the time domain, including: any valid PRACH opportunity among the multiple PRACH opportunities all overlap with the flexible symbol in the time domain.

[0404] As an embodiment, any valid PRACH opportunity among the multiple PRACH opportunities is located in a flexible symbol in the time domain, including: any valid PRACH opportunity among the multiple PRACH opportunities is all located in the flexible symbol indicated by tdd-UL-DL-ConfigCommon in the time domain.

[0405] As an embodiment, any one valid PRACH opportunity among the multiple PRACH opportunities is located in a flexible symbol in the time domain, including: any one valid PRACH opportunity among the multiple PRACH opportunities is all located in flexible symbols in the time domain that are not indicated as full-duplex symbols by the second information block.

[0406] Example 9

[0407] Embodiment 9 illustrates a schematic diagram of the relationship between a target sub-band and a reference sub-band according to an embodiment of the present application, as shown in FIG9 . In FIG9 , the vertical axis represents frequency, the frequency region between the two long dashed lines represents the reference sub-band, and the frequency region between the two short dashed lines represents the target sub-band. The target sub-band and the reference sub-band are non-orthogonal.

[0408] In Example 9, the multiple PRACH opportunities in the present application belong to a reference sub-band in the frequency domain, the target sub-band and the reference sub-band in the present application are non-orthogonal, and the first information block in the present application indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band.

[0409] As an embodiment, the design is further simplified by continuing to use the configuration signaling of the PRACH opportunity based on BWP (bandwidth part).

[0410] As an embodiment, the reference sub-band is BWP.

[0411] As an embodiment, the reference sub-band is an uplink (UL) BWP.

[0412] As an embodiment, the reference sub-band is an active uplink BWP or an initial uplink BWP.

[0413] As an embodiment, the reference sub-band includes at least one RB (resource block).

[0414] As an embodiment, the reference sub-band includes at least one RB corresponding to a subcarrier spacing.

[0415] As an embodiment, the target sub-band and the reference sub-band are non-orthogonal including: the target sub-band belongs to the reference sub-band.

[0416] As an embodiment, the target sub-band and the reference sub-band are non-orthogonal including: all frequency domain resources included in the target sub-band belong to the reference sub-band. As a subsidiary embodiment of the above embodiment, this has the advantage of simple design and compatibility with existing BWP designs.

[0417] In one embodiment, the target sub-band and the reference sub-band being non-orthogonal includes: only a portion of the frequency domain resources included in the target sub-band belong to the reference sub-band. As a subsidiary embodiment of the above embodiment, this method has the advantage of providing greater flexibility in configuring full-duplex sub-bands while more fully considering the impact of sub-interference.

[0418] As an embodiment, the target sub-band and the reference sub-band are non-orthogonal, including: the reference sub-band includes all or part of the frequency domain resources of the target sub-band.

[0419] As an embodiment, the target sub-band and the reference sub-band being non-orthogonal includes: the target sub-band being a subset of the reference sub-band.

[0420] As an embodiment, the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band, including: the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities in the time interval occupied by one PRACH opportunity and the starting frequency domain resources included in the reference sub-band.

[0421] As an embodiment, the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band, including: the first information block indicates the frequency domain interval between the lowest frequency domain PRACH opportunity among the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band.

[0422] As an embodiment, the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band, including: the first information block indicates the frequency domain interval between the starting frequency domain resources of the PRACH opportunity with the lowest frequency domain among the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band.

[0423] As an embodiment, the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band, including: the first information block indicates the frequency domain offset value between the lowest frequency domain PRACH opportunity among the multiple PRACH opportunities and the lowest PRB included in the reference sub-band.

[0424] As an embodiment, the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band, including: the first information block indicates the frequency domain offset value between the lowest frequency domain PRACH opportunity among the multiple PRACH opportunities and PRB 0 of the reference sub-band.

[0425] As an embodiment, the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band, including: the first information block indicates the number of PRBs spaced between the lowest frequency domain PRACH opportunity among the multiple PRACH opportunities and PRB 0 of the reference sub-band.

[0426] As an embodiment, the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band, including: the msg1-FrequencyStart field included in the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band.

[0427] As an embodiment, the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band, including: the msgA-RO-FrequencyStart-r16 field included in the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band.

[0428] Example 10

[0429] Embodiment 10 illustrates a schematic diagram of a second PRACH opportunity according to an embodiment of the present application, as shown in FIG10. In FIG10, in cases A and B, the horizontal axis represents time, the vertical axis represents frequency, the frequency domain area between the two dashed lines represents the target sub-band, the rectangle filled with diagonal lines represents the second PRACH opportunity, the rectangle without fill represents the time slot of the second PRACH opportunity including the previous downlink symbol that is not configured as a full-duplex symbol, and the rectangle filled with cross lines represents the symbol occupied by the synchronous broadcast signal; in case A, the second PRACH time slot belongs to the target sub-band; in case B, the second PRACH time slot does not belong to the target sub-band.

[0430] In embodiment 10, the second PRACH opportunity is one of the multiple PRACH opportunities in the present application, and the second PRACH opportunity is located in a flexible symbol in the time domain but not in a full-duplex symbol; when the second PRACH opportunity belongs to the target sub-band in the present application in the frequency domain, the second PRACH opportunity is valid; when the second PRACH opportunity does not belong to the target sub-band in the frequency domain and the second PRACH opportunity is not located before the synchronization broadcast signal belonging to the same PRACH time slot in the time domain and the start of the second PRACH opportunity is at least M symbols later than the previous downlink symbol and the previous synchronization broadcast signal, the second PRACH opportunity is valid, and M is a non-negative integer related to the subcarrier spacing of the random access preamble.

[0431] As an embodiment, different validity judgment conditions are adopted for PRACH opportunities falling into flexible symbols according to whether the frequency domain falls into the target sub-band, taking into account the impact of the full-duplex sub-band while maximally reusing the existing design, further optimizing the PRACH design.

[0432] As an embodiment, the second PRACH opportunity is any one of the multiple PRACH opportunities that is located in a flexible symbol but not in a full-duplex symbol in the time domain.

[0433] As an embodiment, the second PRACH opportunity is a given one of the multiple PRACH opportunities, which is located in a flexible symbol but not in a full-duplex symbol in the time domain.

[0434] As an embodiment, the second PRACH opportunity and the first PRACH opportunity are two different PRACH opportunities.

[0435] As an embodiment, the second PRACH opportunity is located in a flexible symbol in the time domain but not in a full-duplex symbol, including: the second PRACH opportunity is entirely located in the flexible symbol in the time domain, and the second PRACH opportunity is not entirely or partially located in a full-duplex symbol in the time domain.

[0436] As an embodiment, the second PRACH opportunity is located in a flexible symbol in the time domain but not in a full-duplex symbol, including: the second PRACH opportunity is entirely located in the flexible symbol in the time domain, and the second PRACH opportunity overlaps between the time domain and non-full-duplex symbols.

[0437] As an embodiment, the second PRACH opportunity being located in a flexible symbol but not in a full-duplex symbol in the time domain includes: the second PRACH opportunity being located entirely or partially in a non-full-duplex flexible symbol in the time domain.

[0438] As an embodiment, the second PRACH opportunity is located in a flexible symbol in the time domain but is not located in a full-duplex symbol, which includes: the second PRACH opportunity overlaps with a non-full-duplex flexible symbol in the time domain.

[0439] As an embodiment, the second PRACH opportunity is located in a flexible symbol in the time domain but not in a full-duplex symbol, including: the second PRACH opportunity overlaps with a flexible symbol that is not configured as a full-duplex symbol in the time domain.

[0440] As an embodiment, the second PRACH opportunity is located in a flexible symbol in the time domain but not in a full-duplex symbol, including: the second PRACH opportunity is located in a flexible symbol indicated by tdd-UL-DL-ConfigCommon in the time domain but not in a full-duplex symbol.

[0441] As an embodiment, the second PRACH opportunity is located in a flexible symbol in the time domain but not in a full-duplex symbol, including: the second PRACH opportunity overlaps in the time domain with a flexible symbol indicated by tdd-UL-DL-ConfigCommon that is not configured as a full-duplex symbol.

[0442] As an embodiment, the second PRACH opportunity is not located before the synchronous broadcast signal belonging to the same PRACH time slot in the time domain, which includes: the second PRACH opportunity is not earlier than (not precedes) the synchronous broadcast signal belonging to the same PRACH time slot in the time domain.

[0443] As an embodiment, the second PRACH opportunity is not located before the synchronous broadcast signal belonging to the same PRACH time slot in the time domain, which includes: the second PRACH opportunity is later than the synchronous broadcast signal belonging to the same PRACH time slot in the time domain.

[0444] As an embodiment, the second PRACH opportunity is not located before the synchronous broadcast signal belonging to the same PRACH time slot in the time domain, including: the second PRACH opportunity is not located before the synchronous broadcast signal included in the PRACH time slot to which the second PRACH opportunity belongs in the time domain.

[0445] As an embodiment, the start of the second PRACH opportunity is at least M symbols later than the previous downlink symbol and the previous synchronous broadcast signal, including: the start time of the second PRACH opportunity is at least M symbols later than the previous downlink symbol that is not configured as a full-duplex symbol and the previous synchronous broadcast signal.

[0446] As an embodiment, the start of the second PRACH opportunity is at least M symbols later than the previous downlink symbol and the previous synchronization broadcast signal, including: the start of the second PRACH opportunity is at least M symbols later than the previous downlink symbol indicated by tdd-UL-DL-ConfigCommon that is not configured as a full-duplex symbol and the previous synchronization broadcast signal.

[0447] As an embodiment, the start of the second PRACH opportunity is at least M symbols later than the previous downlink symbol and the previous synchronization broadcast signal, including: the start of the second PRACH opportunity is at least M symbols later than the previous downlink symbol indicated by tdd-UL-DL-ConfigCommon that is not configured as a full-duplex symbol and the previous synchronization broadcast signal.

[0448] As an embodiment, the previous downlink symbol of the second PRACH opportunity is a downlink symbol that is earlier than the second PRACH opportunity and is closest to the second PRACH opportunity in the time domain.

[0449] As an embodiment, the previous downlink symbol of the second PRACH opportunity is a downlink symbol that is earlier than the second PRACH opportunity and has the smallest interval with the second PRACH opportunity in the time domain.

[0450] As an embodiment, the previous downlink symbol of the second PRACH opportunity is a downlink symbol indicated by tdd-UL-DL-ConfigCommon that is earlier than the second PRACH opportunity and has the smallest interval with the second PRACH opportunity in the time domain and is not configured as a full-duplex symbol.

[0451] As an embodiment, the previous synchronization broadcast signal of the second PRACH opportunity is a synchronization broadcast signal that is earlier than the second PRACH opportunity and has the smallest interval with the second PRACH opportunity in the time domain.

[0452] As an embodiment, M is equal to N gap The value of .

[0453] As an embodiment, M is equal to one of 0, 2, 8, and 16.

[0454] As an embodiment, M is equal to one of 0 and 2.

[0455] As an embodiment, the subcarrier spacing of the random access preamble is configurable.

[0456] As an embodiment, the subcarrier spacing of the random access preamble depends on the configured random access preamble format.

[0457] As an embodiment, the M is a non-negative integer related to the subcarrier spacing of the random access preamble, including: the M is a non-negative integer that depends on the subcarrier spacing of the random access preamble.

[0458] As an embodiment, the M is a non-negative integer related to the subcarrier spacing of the random access preamble, including: the M is a non-negative integer corresponding to (or associated with) the subcarrier spacing of a configured random access preamble.

[0459] As an embodiment, the M is a non-negative integer related to the subcarrier spacing of the random access preamble, including: the M is equal to one of X1 candidate integers, the X1 candidate integers correspond one-to-one to the subcarrier spacing of the X1 random access preambles, the X1 is a positive integer greater than 1, and the M is equal to the candidate integer among the X1 candidate integers corresponding to the configured subcarrier spacing of the random access preamble.

[0460] As an embodiment, the M is a non-negative integer related to the subcarrier spacing of the random access preamble, including: the subcarrier spacing of the random access preamble is used to determine the M, and the M is a non-negative integer.

[0461] As an embodiment, the user equipment expects that all flexible symbols indicated by tdd-UL-DL-ConfigCommon in a periodic time window are configured as full-duplex symbols or none of them are configured as full-duplex symbols.

[0462] As an embodiment, the user equipment does not expect that some flexible symbols indicated by tdd-UL-DL-ConfigCommon in a periodic time window are configured as full-duplex symbols.

[0463] Example 11

[0464] Embodiment 11 illustrates a schematic diagram of mapping multiple PRACH opportunities and synchronized broadcast signals according to an embodiment of the present application, as shown in FIG11. In FIG11, each rectangle represents a transmission of a synchronized broadcast signal, the number therein represents the index value of the synchronized broadcast signal, the upper dotted ellipse represents a valid PRACH opportunity in the time domain located in a full-duplex symbol indicated as a downlink by the TDD uplink and downlink configuration among multiple PRACH opportunities, and the lower dotted ellipse represents a valid PRACH opportunity in the time domain located in a symbol other than the full-duplex symbol indicated as a downlink by the TDD uplink and downlink configuration among multiple PRACH opportunities.

[0465] In embodiment 11, the PRACH opportunities in the time domain of the multiple PRACH opportunities in the present application that are located in full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration and the PRACH opportunities that are located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are respectively mapped to the synchronous broadcast signal.

[0466] As an embodiment, PRACH opportunities and synchronous broadcast signals on downlink full-duplex symbols and symbols other than downlink full-duplex symbols are mapped separately, thereby improving PRACH capacity while avoiding adverse effects on existing users and ensuring backward compatibility.

[0467] As an embodiment, the TDD uplink / downlink configuration is an uplink / downlink TDD configuration used to determine a timeslot format.

[0468] As an embodiment, the TDD uplink and downlink configuration at least includes configuration information indicating which symbols in a periodic time window are downlink symbols, which symbols are flexible symbols, and which symbols are uplink symbols.

[0469] As an embodiment, the TDD uplink and downlink configuration is a higher-layer configuration that at least includes indication information of the link direction of the symbol.

[0470] As an embodiment, the TDD uplink and downlink configuration is an RRC layer configuration.

[0471] As an embodiment, the TDD uplink and downlink configuration is a higher-layer configuration.

[0472] As an embodiment, the TDD uplink and downlink configuration further includes indication information of the adopted subcarrier spacing.

[0473] As an embodiment, the TDD uplink and downlink configuration further includes indication information of the length of the adopted periodic time window.

[0474] As an embodiment, the TDD uplink and downlink configuration includes part or all of the fields in the IE "tdd-UL-DL-ConfigCommon".

[0475] As an embodiment, the TDD uplink and downlink configuration includes part or all of the fields in the IE "tdd-UL-DL-ConfigDedicated".

[0476] As an embodiment, only “tdd-UL-DL-ConfigCommon” is considered to simplify the design and reduce the workload of standards.

[0477] As an embodiment, both "tdd-UL-DL-ConfigCommon" and "tdd-UL-DL-ConfigDedicated" are considered, and the existing design is used to the maximum extent to ensure compatibility.

[0478] As an embodiment, the PRACH opportunity located in the full-duplex symbol indicated as downlink by the TDD uplink and downlink configuration is a PRACH opportunity in which all time domain resources occupied (or mapped) are located in the full-duplex symbol indicated as downlink by the TDD uplink and downlink configuration.

[0479] As an embodiment, the PRACH opportunity located in the full-duplex symbol indicated as downlink by the TDD uplink and downlink configuration is the PRACH opportunity overlapping between all occupied (or mapped) time domain resources and the full-duplex symbol indicated as downlink by the TDD uplink and downlink configuration.

[0480] As an embodiment, the PRACH opportunity located in the full-duplex symbol indicated as downlink by the TDD uplink and downlink configuration is a PRACH opportunity that only occupies the full-duplex symbol indicated as downlink by the TDD uplink and downlink configuration in the time domain.

[0481] As an embodiment, the PRACH opportunity located in a symbol other than a full-duplex symbol indicated as a downlink by the TDD uplink and downlink configuration includes a PRACH opportunity located in an uplink symbol or a flexible symbol not configured as a full-duplex symbol.

[0482] As an embodiment, the PRACH opportunities located in symbols other than full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration include PRACH opportunities located in symbols that are not configured as full-duplex symbols.

[0483] As an embodiment, the PRACH opportunity located in a symbol other than a full-duplex symbol indicated as a downlink by the TDD uplink and downlink configuration includes a PRACH opportunity located in a non-full-duplex symbol.

[0484] As an embodiment, the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration include all occupied (or mapped) time domain resources located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration.

[0485] As an embodiment, a PRACH opportunity located in a symbol outside the full-duplex symbol indicated as a downlink by the TDD uplink and downlink configuration includes a PRACH opportunity in which only a portion of the time domain resources occupied (or mapped) is located in a symbol outside the full-duplex symbol indicated as a downlink by the TDD uplink and downlink configuration.

[0486] As an embodiment, the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration include all occupied (or mapped) time domain resources and PRACH opportunities that overlap with symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration.

[0487] As an embodiment, a PRACH opportunity located in a symbol other than a full-duplex symbol indicated as a downlink by the TDD uplink and downlink configuration includes only a portion of the time domain resources occupied (or mapped) and a PRACH opportunity that overlaps with a symbol other than a full-duplex symbol indicated as a downlink by the TDD uplink and downlink configuration.

[0488] As an embodiment, the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration include PRACH opportunities that occupy only symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration in the time domain.

[0489] As an embodiment, the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration include PRACH opportunities that occupy both symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration and full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration in the time domain.

[0490] As an embodiment, the PRACH opportunities in the time domain of the multiple PRACH opportunities that are located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration and the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are each mapped to the synchronous broadcast signal, including: the PRACH opportunities in the time domain of the multiple PRACH opportunities that are located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration and the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are independently mapped to the synchronous broadcast signal.

[0491] As an embodiment, the PRACH opportunities in the time domain located in full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration and the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration among the multiple PRACH opportunities are each mapped to a synchronous broadcast signal, including: the PRACH opportunities in the time domain located in full-duplex symbols that are non-flexible symbols and the PRACH opportunities located in symbols other than the full-duplex symbols or flexible symbols among the multiple PRACH opportunities are each mapped to a synchronous broadcast signal.

[0492] As an embodiment, the PRACH opportunities in the time domain of the multiple PRACH opportunities located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration and the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are each mapped to the synchronous broadcast signal, including: the PRACH opportunities in the time domain of the multiple PRACH opportunities located in the full-duplex symbols indicated as downlink symbols by tdd-UL-DL-ConfigCommon and the PRACH opportunities indicated as uplink symbols or flexible symbols by tdd-UL-DL-ConfigCommon are each mapped to the synchronous broadcast signal.

[0493] As an embodiment, the PRACH opportunities in the time domain of the multiple PRACH opportunities located in full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration and the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are each mapped with a synchronized broadcast signal, including: the PRACH opportunities in the time domain of the multiple PRACH opportunities located in full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration and the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are each mapped with a synchronized broadcast signal in the same time window. As a subsidiary embodiment of the above embodiment, the advantage of doing so is that the existing association period design is adopted, reducing the standard workload.

[0494] As an embodiment, the PRACH opportunities in the time domain of the multiple PRACH opportunities located in full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration and the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are each mapped with a synchronized broadcast signal, including: the PRACH opportunities in the time domain of the multiple PRACH opportunities located in full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration and the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are each mapped with a synchronized broadcast signal in their respective time windows. As a subsidiary embodiment of the above embodiment, the advantage of doing so is that an independent association period is adopted for the PRACH opportunities in the downlink full-duplex symbols, thereby improving flexibility and optimizing PRACH capacity performance.

[0495] As an embodiment, the PRACH opportunities in the multiple PRACH opportunities that are located in the full-duplex symbols indicated as downlinks by the TDD uplink and downlink configuration in the time domain and the PRACH opportunities that are located in symbols other than the full-duplex symbols indicated as downlinks by the TDD uplink and downlink configuration are each mapped with a synchronous broadcast signal, including: the mapping of the PRACH opportunities in the multiple PRACH opportunities that are located in the full-duplex symbols indicated as downlinks by the TDD uplink and downlink configuration in the time domain and the synchronous broadcast signal and the mapping of the PRACH opportunities in symbols other than the full-duplex symbols indicated as downlinks by the TDD uplink and downlink configuration and the synchronous broadcast signal do not affect each other.

[0496] As an embodiment, the PRACH opportunities in the time domain that are located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration and the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration among the multiple PRACH opportunities are each mapped to the synchronous broadcast signal, including: the PRACH opportunities in the time domain that are located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration and the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration among the multiple PRACH opportunities are each mapped to the index of the synchronous broadcast signal.

[0497] As an embodiment, the PRACH opportunities in the multiple PRACH opportunities that are located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration in the time domain and the PRACH opportunities that are located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are each mapped to the synchronous broadcast signal, including: the PRACH opportunities in the multiple PRACH opportunities that are located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration in the time domain and the PRACH opportunities that are located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are each mapped according to the same sorting rule and the index of the synchronous broadcast signal.

[0498] As an embodiment, the PRACH opportunities in the multiple PRACH opportunities that are located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration in the time domain and the PRACH opportunities that are located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are each mapped to the synchronous broadcast signal, including: the PRACH opportunities in the multiple PRACH opportunities that are located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration in the time domain and the PRACH opportunities that are located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are each independently sorted and then mapped to the synchronous broadcast signal.

[0499] As an embodiment, the PRACH opportunities in the time domain of the multiple PRACH opportunities located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration and the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are each mapped with the synchronous broadcast signal, including: the PRACH opportunities located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are associated with the synchronous broadcast signal in sequence according to a given order, and the PRACH opportunities located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are also associated with the synchronous broadcast signal in sequence according to a given order.

[0500] As an embodiment, the PRACH opportunities in the time domain of the multiple PRACH opportunities located in the full-duplex symbol indicated as downlink by the TDD uplink and downlink configuration and the PRACH opportunities located in symbols other than the full-duplex symbol indicated as downlink by the TDD uplink and downlink configuration are mapped to the synchronous broadcast signal respectively, including: the synchronous broadcast block index and the valid PRACH opportunities in the time domain located in the full-duplex symbol indicated as downlink by the TDD uplink and downlink configuration are mapped according to the preamble index in one PRACH opportunity, the frequency resource index of the frequency-divided PRACH opportunity, and the frequency resource index of the frequency-divided PRACH opportunity. The time domain resource index of the time-divided PRACH opportunity in a PRACH time slot is finally mapped in sequence according to the mapping order of the PRACH time slot index; the synchronous broadcast block index and the valid PRACH opportunity located in the symbol other than the full-duplex symbol indicated as the downlink by the TDD uplink and downlink configuration are mapped in sequence according to the mapping order of the leading index in a PRACH opportunity, then the frequency resource index of the frequency-divided PRACH opportunity, then the time domain resource index of the time-divided PRACH opportunity in a PRACH time slot, and finally the PRACH time slot index.

[0501] As an embodiment, the PRACH opportunities in the time domain of the multiple PRACH opportunities located in the full-duplex symbol indicated as downlink by the TDD uplink and downlink configuration and the PRACH opportunities located in symbols other than the full-duplex symbol indicated as downlink by the TDD uplink and downlink configuration are mapped to the synchronous broadcast signal respectively, including: the synchronous broadcast block is indexed according to 0, 1... and the valid PRACH opportunities in the time domain located in the full-duplex symbol indicated as downlink by the TDD uplink and downlink configuration are mapped according to the preamble index in one PRACH opportunity, then according to the frequency resource index of the frequency-divided PRACH opportunity, and then according to the index of the frequency-divided PRACH opportunity. The time domain resource index of the time-divided PRACH opportunity in a PRACH time slot is finally mapped in sequence according to the mapping order of the index of the PRACH time slot; the synchronization broadcast block is mapped in sequence according to the indexes 0, 1... and the valid PRACH opportunities in the symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration according to the mapping order of the leading index in a PRACH opportunity, then the frequency resource index of the frequency-divided PRACH opportunity, then the time domain resource index of the time-divided PRACH opportunity in a PRACH time slot, and finally the index of the PRACH time slot.

[0502] Example 12

[0503] Embodiment 12 illustrates a structural block diagram of a processing device in a first node device according to an embodiment, as shown in FIG12 . In FIG12 , the first node device processing device 1200 includes a first receiver 1201. The first receiver 1201 includes the transmitter / receiver 456 (including the antenna 460), the receiving processor 452, and the controller / processor 490 in FIG4 of the present application.

[0504] In embodiment 12, the first receiver 1201 receives a first information block, which indicates multiple PRACH opportunities; the first receiver 1201 receives a second information block, which indicates a target sub-band and at least one full-duplex symbol; wherein the first PRACH opportunity is one of the multiple PRACH opportunities indicated by the first information block, and the first PRACH opportunity overlaps in the time domain with at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0505] As an embodiment, the effectiveness of the first PRACH opportunity also depends on the relationship between the interval length of the first PRACH opportunity in the time domain and between adjacent non-full-duplex symbols and a first threshold, wherein the first threshold is configured or predefined and / or related to the user equipment capability.

[0506] As an embodiment, the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity and at least one boundary of the target sub-band in the frequency domain is not less than a second threshold, which is a condition for the validity of the first PRACH opportunity, and the second threshold is predefined or configured.

[0507] As an embodiment, any valid PRACH opportunity among the multiple PRACH opportunities is located in an uplink symbol in the time domain, or in a full-duplex symbol in the time domain, or in a flexible symbol in the time domain.

[0508] As an embodiment, the multiple PRACH opportunities belong to a reference sub-band in the frequency domain, the target sub-band and the reference sub-band are non-orthogonal, and the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band.

[0509] As an embodiment, the second PRACH opportunity is one of the multiple PRACH opportunities, and the second PRACH opportunity is located in the flexible symbol in the time domain but not in the full-duplex symbol; when the second PRACH opportunity belongs to the target sub-band in the frequency domain, the second PRACH opportunity is valid; when the second PRACH opportunity does not belong to the target sub-band in the frequency domain and the second PRACH opportunity is not located before the synchronization broadcast signal belonging to the same PRACH time slot in the time domain and the start of the second PRACH opportunity is at least M symbols later than the previous downlink symbol and the previous synchronization broadcast signal, the second PRACH opportunity is valid, and M is a non-negative integer related to the subcarrier spacing of the random access preamble.

[0510] As an embodiment, the PRACH opportunities among the multiple PRACH opportunities that are located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration in the time domain and the PRACH opportunities that are located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are respectively mapped to the synchronous broadcast signal.

[0511] Example 13

[0512] Embodiment 13 illustrates a block diagram of a processing device in a second node device according to an embodiment, as shown in FIG13 . In FIG13 , the second node device processing device 1300 includes a first transmitter 1301. The first transmitter 1301 includes the transmitter / receiver 416 (including the antenna 460), the transmit processor 415, and the controller / processor 440 in FIG4 of the present application.

[0513] In embodiment 13, the first transmitter 1301 sends a first information block, which indicates multiple PRACH opportunities; the first transmitter 1301 sends a second information block, which indicates a target sub-band and at least one full-duplex symbol; wherein the first PRACH opportunity is one of the multiple PRACH opportunities indicated by the first information block, and the first PRACH opportunity overlaps in the time domain with at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

[0514] As an embodiment, the effectiveness of the first PRACH opportunity also depends on the relationship between the interval length of the first PRACH opportunity in the time domain and between adjacent non-full-duplex symbols and a first threshold, wherein the first threshold is configured or predefined and / or related to the user equipment capability.

[0515] As an embodiment, the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity and at least one boundary of the target sub-band in the frequency domain is not less than a second threshold, which is a condition for the validity of the first PRACH opportunity, and the second threshold is predefined or configured.

[0516] As an embodiment, any valid PRACH opportunity among the multiple PRACH opportunities is located in an uplink symbol in the time domain, or in a full-duplex symbol in the time domain, or in a flexible symbol in the time domain.

[0517] As an embodiment, the multiple PRACH opportunities belong to a reference sub-band in the frequency domain, the target sub-band and the reference sub-band are non-orthogonal, and the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band.

[0518] As an embodiment, the second PRACH opportunity is one of the multiple PRACH opportunities, and the second PRACH opportunity is located in the flexible symbol in the time domain but not in the full-duplex symbol; when the second PRACH opportunity belongs to the target sub-band in the frequency domain, the second PRACH opportunity is valid; when the second PRACH opportunity does not belong to the target sub-band in the frequency domain and the second PRACH opportunity is not located before the synchronization broadcast signal belonging to the same PRACH time slot in the time domain and the start of the second PRACH opportunity is at least M symbols later than the previous downlink symbol and the previous synchronization broadcast signal, the second PRACH opportunity is valid, and M is a non-negative integer related to the subcarrier spacing of the random access preamble.

[0519] As an embodiment, the PRACH opportunities among the multiple PRACH opportunities that are located in the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration in the time domain and the PRACH opportunities that are located in symbols other than the full-duplex symbols indicated as downlink by the TDD uplink and downlink configuration are respectively mapped to the synchronous broadcast signal.

[0520] Those skilled in the art will appreciate that all or part of the steps in the above method can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk or an optical disk. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment can be implemented in the form of hardware or in the form of a software functional module. The present application is not limited to any specific form of combination of software and hardware. The first node device or second node device or UE or terminal in the present application includes but is not limited to mobile phones, tablets, notebooks, network cards, low-power devices, eMTC devices, NB-IoT devices, vehicle-mounted communication equipment, aircraft, airplanes, drones, remote-controlled aircraft, test devices, test equipment, test instruments and other equipment. The base station device or base station or network side device in the present application includes but is not limited to macrocell base stations, microcell base stations, home base stations, relay base stations, eNBs, gNBs, transmission and reception nodes TRPs, relay satellites, satellite base stations, airborne base stations, test devices, test equipment, test instruments and other equipment.

[0521] Those skilled in the art will appreciate that the present invention may be implemented in other specific forms without departing from its core or essential characteristics. Therefore, the presently disclosed embodiments should be considered in all respects as illustrative and not restrictive. The scope of the invention is determined by the appended claims, not the foregoing description, and all modifications that come within the meaning and range of equivalents are intended to be embraced therein.

Claims

1. A first node device for wireless communication, characterized in that: include: A first receiver receives a first information block, wherein the first information block indicates a plurality of PRACH opportunities; The first receiver receives a second information block, the second information block indicating a target sub-band and at least one full-duplex symbol; The first PRACH opportunity is one of the multiple PRACH opportunities indicated by the first information block, and the first PRACH opportunity overlaps in the time domain with at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

2. The first node device according to claim 1, characterized in that: The validity of the first PRACH opportunity also depends on the relationship between the length of the interval between the first PRACH opportunity and adjacent non-full-duplex symbols in the time domain and a first threshold, where the first threshold is configured or predefined and / or related to user equipment capabilities.

3. The first node device according to claim 1 or 2, characterized in that: The condition that the first PRACH opportunity is valid is that the first PRACH opportunity belongs to the target sub-band in the frequency domain and the frequency domain interval between the first PRACH opportunity and at least one boundary of the target sub-band in the frequency domain is not less than a second threshold, and the second threshold is predefined or configured.

4. The first node device according to any one of claims 1 to 3, characterized in that: Any valid PRACH opportunity among the multiple PRACH opportunities is located in an uplink symbol in the time domain, or in a full-duplex symbol in the time domain, or in a flexible symbol in the time domain.

5. The first node device according to any one of claims 1 to 4, characterized in that: The multiple PRACH opportunities belong to a reference sub-band in the frequency domain, the target sub-band and the reference sub-band are non-orthogonal, and the first information block indicates the frequency domain interval between the starting frequency domain resources occupied by the multiple PRACH opportunities and the starting frequency domain resources included in the reference sub-band.

6. The first node device according to any one of claims 1 to 5, characterized in that: The second PRACH opportunity is one of the multiple PRACH opportunities, and the second PRACH opportunity is located in the flexible symbol in the time domain but not in the full-duplex symbol; when the second PRACH opportunity belongs to the target sub-band in the frequency domain, the second PRACH opportunity is valid; when the second PRACH opportunity does not belong to the target sub-band in the frequency domain and the second PRACH opportunity is not located before the synchronization broadcast signal belonging to the same PRACH time slot in the time domain and the start of the second PRACH opportunity is at least M symbols later than the previous downlink symbol and the previous synchronization broadcast signal, the second PRACH opportunity is valid, and M is a non-negative integer related to the subcarrier spacing of the random access preamble.

7. The first node device according to any one of claims 1 to 6, characterized in that: Among the multiple PRACH opportunities, PRACH opportunities located in full-duplex symbols indicated as downlink by TDD uplink and downlink configuration in the time domain and PRACH opportunities located in symbols other than full-duplex symbols indicated as downlink by TDD uplink and downlink configuration are respectively mapped to the synchronous broadcast signal.

8. A second node device for wireless communication, characterized in that: include: A first transmitter sends a first information block, where the first information block indicates a plurality of PRACH opportunities; The first transmitter transmits a second information block, wherein the second information block indicates a target sub-band and at least one full-duplex symbol; The first PRACH opportunity is one of the multiple PRACH opportunities indicated by the first information block, and the first PRACH opportunity overlaps in the time domain with at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

9. A method in a first node for wireless communication, characterized in that include: receiving a first information block indicating a plurality of PRACH opportunities; receiving a second information block, the second information block indicating a target sub-band and at least one full-duplex symbol; The first PRACH opportunity is one of the multiple PRACH opportunities indicated by the first information block, and the first PRACH opportunity overlaps in the time domain with at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

10. A method in a second node for wireless communication, characterized in that: include: sending a first information block, the first information block indicating a plurality of PRACH opportunities; sending a second information block, wherein the second information block indicates a target sub-band and at least one full-duplex symbol; The first PRACH opportunity is one of the multiple PRACH opportunities indicated by the first information block, and the first PRACH opportunity overlaps in the time domain with at least one full-duplex symbol indicated by the second information block; the synchronous broadcast signal is mapped to a valid PRACH opportunity among the multiple PRACH opportunities, and the validity of the first PRACH opportunity depends on the relationship between the first PRACH opportunity in the frequency domain and the target sub-band.

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