Method and apparatus in node used for wireless communication

Abstract

The invention discloses a method and an apparatus in a node used for wireless communication. A first node receives a first information block, the first information block indicating a first symbol set; determining a target RO group, and sending a random access preamble in the target RO group; the first symbol set comprises at least one symbol which is configured as a downlink symbol by TDD uplink and downlink configuration signaling and is used for uplink transmission; the target RO group comprises at least one RO, and the ROs in the target RO group are all associated to a first SSB index; whether the target RO group includes ROs in the first symbol set depends on the number of ROs included by the target RO group. The random access process design is optimized, the scene that the RO on the SBFD symbol is used for enhanced random access is supported, the problem that RO configuration conflicts with the SBFD symbol is solved, and the access time delay is reduced while uplink coverage is improved.

Description

Technical Field

[0001] The present application relates to a transmission method and device in a wireless communication system, and in particular to a method and device for a random access process. Background Art

[0002] In the future, the application scenarios of wireless communication systems will become more and more diversified, and different application scenarios will put forward different performance requirements for the system. In order to meet the different performance requirements of various application scenarios, the 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) #72 plenary meeting decided to study the new radio (NR) (or 5G) technology, and the WI (Work Item) of the new radio (NR) technology was passed at the 3GPP RAN #75 plenary meeting, and the standardization work on NR began.

[0003] In the existing NR system, spectrum resources are statically divided into FDD (Frequency Division Duplexing) spectrum and TDD (Time Division Duplexing) spectrum. For TDD spectrum, both base stations and UE (User Equipment) work in half-duplex mode. This half-duplex mode avoids self-interference and can alleviate the impact of cross-link interference (CLI), but it also brings problems such as reduced resource utilization and increased latency. In response to these problems, supporting flexible duplex mode or variable link direction (uplink or downlink or flexible) on TDD spectrum or FDD spectrum has become a possible solution. In the 3GPP RAN#88e meeting and the 3GPP Rel-18 (Release-18, Version 18) workshop, supporting more flexible duplex mode or full-duplex mode in NR Rel-18 has received widespread attention and discussion, especially the SubBand non-overlapping Full Duplex (SBFD) mode on the gNB (NR Node B) side. Communications in this mode will be severely interfered with, including self-interference and CLI. To solve the interference problem, advanced interference cancellation techniques are needed, including antenna isolation, beamforming, RF (Radio Frequency) level interference cancellation, and digital interference cancellation.

[0004] With the continuous development of wireless communications, the requirements for uplink coverage are getting higher and higher. PRACH (Physical Random Access CHannel) transmission is a very important part in the initial access and beam failure recovery processes. Therefore, Rel-18 established the "Further NR coverage enhancements" work project to further enhance the uplink coverage of PRACH. Among them, PRACH repetition, that is, multiple PRACH transmissions, is an important research direction. Summary of the invention

[0005] In the current standard, the UE (User Equipment) has selected an SSB before sending a random access preamble. The UE selects an RO and preamble from the RO set and preambles associated with the selected SSB. The base station determines the SSB selected by the UE based on the association between the RO detected in the preamble and the SSB, and then determines the downlink transmission beam. The association relationship between the SSB index mapping to the valid RO supports three situations: many-to-one, one-to-one and one-to-many. In TDD mode, the RO configured by the base station is not necessarily valid. The UE still needs to determine whether an RO can be used to send a preamble in combination with the frame structure; among them, when the UE has received the frame structure configuration tdd-UL-DL-ConfigurationCommon signaling, the valid RO includes the RO on the UL (UpLink) symbol.

[0006] For multiple PRACH transmissions, NR plans to introduce RO groups. Each RO in an RO group is mapped to the same SSB index. Multiple PRACH transmissions for a RACH (Random Access CHannel) attempt are performed in an RO group, where the number of valid ROs included in an RO group is equal to one of the configured multiple PRACH transmission times.

[0007] In multiple PRACH transmissions in the SBFD scenario, in addition to UL symbols, SBFD symbols can also be used by SBFD-aware UE for uplink transmission. Therefore, when the RO configured by the base station overlaps with the SBFD symbol, whether the SSB index can be mapped to the RO on the SBFD symbol and whether the RO on the SBFD symbol can send a preamble are issues that need to be resolved.

[0008] In response to the above problems, the present application discloses a solution. It should be noted that although the original intention of the present application is for SBFD scenarios, the present application can also be applied to other non-SBFD scenarios; further, the use of a unified design scheme for different scenarios (such as other non-SBFD scenarios, including but not limited to capacity enhancement systems, coverage enhancement systems, short-range communication systems, unlicensed frequency domain communications, IoT (Internet of Things), URLLC (Ultra Reliable Low Latency Communication) networks, Internet of Vehicles, etc.) can also help reduce hardware complexity and costs. In the absence of conflict, the embodiments and features in any node of the present application can be applied to any other node. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.

[0009] In particular, the interpretation of the terminology, nouns, functions, and variables in this application (if not otherwise specified) can refer to the definitions in the 3GPP specification protocols TS38 series and TS37 series. If necessary, reference can be made to 3GPP standards TS38.211, TS38.212, TS38.213, TS38.214, TS38.215, TS38.300, TS38.304, TS38.305, TS38.321, TS38.331, TS37.355, TS38.423 to assist in understanding this application.

[0010] As an example, the interpretation of the terms in the present application refers to the definitions of the TS38 series of specification protocols of 3GPP.

[0011] As an example, the interpretation of the terms in the present application refers to the definitions of the TS37 series of specification protocols of 3GPP.

[0012] As an embodiment, the interpretation of the terms in the present application refers to the definition of the standard protocol of IEEE (Institute of Electrical and Electronics Engineers).

[0013] The present application discloses a method in a first node used for wireless communication, which includes:

[0014] receiving a first information block, the first information block indicating a first set of symbols;

[0015] determining a target RO group, and sending a random access preamble in the target RO group;

[0016] Among them, the first symbol set includes at least one symbol configured as a downlink symbol by TDD uplink and downlink configuration signaling and used for uplink transmission; the target RO group includes at least one RO, and the ROs in the target RO group are all associated with the first SSB index; whether the target RO group includes the RO in the first symbol set depends on the number of ROs included in the target RO group.

[0017] As an embodiment, the problem to be solved by the present application includes: in a full-duplex scenario, how the first node determines an RO group for random access.

[0018] As an embodiment, the problems to be solved by the present application include: in a full-duplex scenario, when the RO used for random access overlaps with the full-duplex symbol, whether the RO overlapping with the full-duplex symbol, that is, the RO occupying the full-duplex symbol, can be included in the RO group selected by the first node and used to send a random access preamble.

[0019] As an embodiment, the characteristics of the above method include: in a full-duplex scenario, the present application determines whether the RO occupying the full-duplex symbol can be included in the RO group selected by the first node and used to send the random access preamble based on the number of ROs included in the RO group used to send the random access preamble, thereby solving the above problem.

[0020] As an embodiment, the characteristics of the above method include: the full-duplex symbol described in the present application includes a SBFD symbol.

[0021] As an embodiment, the characteristics of the above method include: the present application is applicable to multiple PRACH transmissions in a full-duplex scenario.

[0022] As an embodiment, the benefits of the above method include: good forward compatibility.

[0023] As an embodiment, the benefits of the above method include: improving the success rate of random access.

[0024] As an embodiment, the benefits of the above method include: supporting multiple PRACH transmissions in a full-duplex scenario can further increase uplink coverage and reduce transmission delay.

[0025] As an embodiment, the benefits of the above method include: determining whether an RO occupying a full-duplex symbol can be selected to send a random access preamble according to the number of ROs included in the RO group can reduce resource waste and redundancy and reduce network costs.

[0026] According to one aspect of the present application, the above method is characterized in that when the number of ROs included in the target RO group is not greater than a first integer, the first node determines whether the target RO group includes the ROs in the first symbol set; when the number of ROs included in the target RO group is greater than a first integer, the target RO group does not include the ROs in the first symbol set; and the first integer is a positive integer.

[0027] As an embodiment, the problems to be solved by the present application include: in a full-duplex scenario, when the RO used for random access overlaps with the full-duplex symbol, whether the RO overlapping with the full-duplex symbol, that is, the RO occupying the full-duplex symbol, can be included in the RO group selected by the first node and used to send a random access preamble.

[0028] As an embodiment, the characteristics of the above method include: the present application introduces a first integer, and determines whether the target RO group includes ROs occupying full-duplex symbols, that is, ROs overlapping with full-duplex symbols, through the relationship between the number of ROs included in the target RO group and the first integer, thereby solving the above problem.

[0029] As an embodiment, the characteristics of the above method include: the number of ROs included in the RO group is equal to one of the configured multiple times of PRACH transmission, the more ROs included in the RO group, the more PRACH resources are occupied, and the more opportunities to send PRACH in one RACH attempt, so as to obtain better uplink coverage and lower transmission delay.

[0030] As an embodiment, the characteristics of the above method include: when the number of ROs included in the target RO group is not greater than the first integer, whether the target RO group includes ROs occupying full-duplex symbols is determined by the first node in the present application.

[0031] As an embodiment, the benefits of the above method include: when the number of ROs included in the target RO group is not greater than the first integer, the first node in the present application can determine whether the target RO group includes ROs occupying full-duplex symbols based on the measured interference and other schemes, which is conducive to improving the reliability and robustness of transmission and adapting to changing scenarios.

[0032] As an embodiment, the benefits of the above method include: when the number of ROs included in the target RO group is not greater than the first integer, the number of multiple PRACH transmissions is relatively small, and the first node can further improve uplink coverage and reduce transmission delay by using ROs occupying full-duplex symbols.

[0033] As an embodiment, the benefits of the above method include: compared with half-duplex symbols, the interference environment on full-duplex symbols is more complex. Therefore, when the number of ROs included in the target RO group is greater than the first integer, the target RO group does not include ROs occupying full-duplex symbols, which can reduce the implementation complexity while ensuring uplink coverage.

[0034] As an embodiment, the benefits of the above method include: when a RO on a full-duplex symbol initiates random access, in order to ensure that the random access is as successful as possible, the UE may need higher power to send a random access preamble in the RO group. Therefore, when the number of ROs included in the target RO group is greater than the first integer, the RO occupying the full-duplex symbol is not included, so that the UE can send the random access preamble with relatively small power, which is beneficial to energy saving on the UE side.

[0035] According to one aspect of the present application, the above method is characterized in that it includes:

[0036] receiving a second information block;

[0037] Among them, the number of ROs included in the target RO group is greater than the first integer, and the target RO group is an RO group in a first RO group set; the first RO group set includes multiple RO groups, each of the multiple RO groups includes N ROs, and N is a configurable positive integer greater than 1; the first RO group set includes at least part of the ROs associated with the first SSB index in an SSB-RO mapping cycle; the first RO group set depends on the second information block.

[0038] As an embodiment, the problem to be solved by the present application includes: in a full-duplex scenario, how the first node determines an RO group for random access.

[0039] As an embodiment, the characteristics of the above method include: the present application solves the above problem by introducing a first RO group set, and when the number of ROs included in the target RO group is greater than a first integer, the first node determines the target RO group from the first RO group set.

[0040] As an embodiment, the characteristics of the above method include: the first RO group set includes at least one RO applicable to legacy UE.

[0041] As an embodiment, the benefits of the above method include: improving transmission reliability.

[0042] As an embodiment, the benefits of the above method include: improving the probability of successful random access.

[0043] According to one aspect of the present application, the above method is characterized in that the number of ROs included in the target RO group is not greater than the first integer, and the target RO group is an RO group in a second RO group set; the second RO group set includes at least one RO in an SSB-RO mapping cycle that is associated with the first SSB index, and the second RO group set includes at least one RO in the first symbol set; the ROs in the RO groups included in the second RO group set are all associated with the first SSB index.

[0044] As an embodiment, the problem to be solved by the present application includes: in a full-duplex scenario, how the first node determines an RO group for random access.

[0045] As an embodiment, the characteristics of the above method include: the present application solves the above problem by introducing a second RO group set. When the number of ROs included in the target RO group is not greater than a first integer, the first node determines the target RO group from the second RO group set.

[0046] As an embodiment, the characteristics of the above method include: the second RO group set includes at least one RO applicable to legacy UE.

[0047] As an embodiment, the benefits of the above method include: when the number of ROs included in the target RO group is not greater than the first integer, the number of multiple PRACH transmissions is relatively small, and the uplink coverage can be further improved and the transmission delay can be reduced by using ROs occupying full-duplex symbols.

[0048] According to one aspect of the present application, the above method is characterized in that it includes:

[0049] receiving first signaling, where the first signaling indicates a first PRACH mask index value;

[0050] Among the ROs associated with the first SSB index in the one SSB-RO mapping cycle, only the ROs indicated by the first PRACH mask index value belong to the first RO group set.

[0051] As an embodiment, the characteristics of the above method include: the present application is applicable to a contention-free random access process.

[0052] As an embodiment, the benefits of the above method include: it can effectively manage and schedule user access, thereby improving network throughput and capacity.

[0053] As an embodiment, the benefits of the above method include: dynamically adjusting access strategies and resource allocation according to network load conditions and user access requirements, thereby providing better network performance and user experience.

[0054] According to one aspect of the present application, the above method is characterized in that it includes:

[0055] receiving a target information block;

[0056] The target information block indicates that the first symbol set is used for random access, and the target RO group can include ROs in the first symbol set.

[0057] As an embodiment, the problem to be solved by the present application includes: how to determine whether the RO occupying the full-duplex symbol is valid in a full-duplex scenario.

[0058] As an embodiment, the characteristics of the above method include: in a full-duplex scenario, the present application solves the problem by explicitly or implicitly indicating in a target information block that a full-duplex symbol is used for random access.

[0059] As an embodiment, the characteristics of the above method include: the base station can flexibly indicate whether the occupied full-duplex symbols are used for random access according to the current interference environment and resource configuration.

[0060] As an embodiment, the characteristics of the above method include: when the number of ROs included in the target RO group is not greater than a first integer, the first node can determine whether the ROs in the target RO group occupy full-duplex symbols according to the target information block.

[0061] As an embodiment, the above method has the following benefits: it can be flexibly applied to different terminals, thus reducing the requirements on terminal capabilities.

[0062] As an embodiment, the benefits of the above method include: when the number of ROs included in the target RO group is not greater than the first integer, the base station can determine the SSB selected by the UE based on the target RO group and the random access preamble sent in the target RO group, and then determine the downlink transmission beam.

[0063] According to one aspect of the present application, the above method is characterized in that, when the number of ROs included in the target RO group is greater than the first integer, the mapping method between the ROs in the first RO group set and the first SSB index is a first mapping method; when the number of ROs included in the target RO group is not greater than the first integer, the mapping method between the ROs in the second RO group set and the first SSB index is a second mapping method; the first mapping method is different from the second mapping method.

[0064] As an embodiment, the benefits of the above method include: different mapping methods are used when the RO group includes different RO numbers, which can avoid the situation where the base station cannot determine the SSB selected by the UE based on the RO group and the random access preamble sent in the RO group due to the many-to-many mapping between the SSB and the RO group, and thus cannot determine the downlink transmission beam. This is conducive to the base station to correctly determine the downlink transmission beam and improve the robustness of the transmission.

[0065] As an embodiment, the benefits of the above method include: reducing the complexity of mapping between SSB and RO groups, facilitating implementation and network maintenance, and reducing the requirements on the capabilities of the terminal and the network.

[0066] According to one aspect of the present application, the above method is characterized in that the first node includes a user equipment.

[0067] According to one aspect of the present application, the above method is characterized in that the first node includes a relay node.

[0068] The present application discloses a method in a second node used for wireless communication, which includes:

[0069] Sending a first information block, wherein the first information block indicates a first set of symbols;

[0070] receiving a random access preamble in a target RO group;

[0071] Among them, the sender of the first information block determines the target RO group, the first symbol set includes at least one symbol configured as a downlink symbol by TDD uplink and downlink configuration signaling and used for uplink transmission; the target RO group includes at least one RO, and the ROs in the target RO group are all associated with the first SSB index; whether the target RO group includes the RO in the first symbol set depends on the number of ROs included in the target RO group.

[0072] According to one aspect of the present application, the above method is characterized in that, when the number of ROs included in the target RO group is not greater than a first integer, the receiver of the first information block determines whether the target RO group includes the ROs in the first symbol set; when the number of ROs included in the target RO group is greater than a first integer, the target RO group does not include the ROs in the first symbol set; and the first integer is a positive integer.

[0073] According to one aspect of the present application, the above method is characterized in that it includes:

[0074] sending a second information block;

[0075] Among them, the number of ROs included in the target RO group is greater than the first integer, and the target RO group is an RO group in a first RO group set; the first RO group set includes multiple RO groups, each of the multiple RO groups includes N ROs, and N is a configurable positive integer greater than 1; the first RO group set includes at least part of the ROs associated with the first SSB index in an SSB-RO mapping cycle; the first RO group set depends on the second information block.

[0076] According to one aspect of the present application, the above method is characterized in that the number of ROs included in the target RO group is not greater than the first integer, and the target RO group is an RO group in a second RO group set; the second RO group set includes at least one RO in an SSB-RO mapping cycle that is associated with the first SSB index, and the second RO group set includes at least one RO in the first symbol set; the ROs in the RO groups included in the second RO group set are all associated with the first SSB index.

[0077] According to one aspect of the present application, the above method is characterized in that it includes:

[0078] Sending first signaling, where the first signaling indicates a first PRACH mask index value;

[0079] Among the ROs associated with the first SSB index in the one SSB-RO mapping cycle, only the ROs indicated by the first PRACH mask index value belong to the first RO group set.

[0080] According to one aspect of the present application, the above method is characterized in that it includes:

[0081] Send target information block;

[0082] The target information block indicates that the first symbol set is used for random access, and the target RO group can include ROs in the first symbol set.

[0083] According to one aspect of the present application, the above method is characterized in that, when the number of ROs included in the target RO group is greater than the first integer, the mapping method between the ROs in the first RO group set and the first SSB index is a first mapping method; when the number of ROs included in the target RO group is not greater than the first integer, the mapping method between the ROs in the second RO group set and the first SSB index is a second mapping method; the first mapping method is different from the second mapping method.

[0084] According to one aspect of the present application, the above method is characterized in that the second node is a base station.

[0085] According to one aspect of the present application, the above method is characterized in that the second node is a user equipment.

[0086] According to one aspect of the present application, the above method is characterized in that the second node is a relay node.

[0087] The present application discloses a device for a first node used for wireless communication, comprising:

[0088] A first receiver receives a first information block, wherein the first information block indicates a first set of symbols;

[0089] A first transmitter determines a target RO group and sends a random access preamble in the target RO group;

[0090] Among them, the first symbol set includes at least one symbol configured as a downlink symbol by TDD uplink and downlink configuration signaling and used for uplink transmission; the target RO group includes at least one RO, and the ROs in the target RO group are all associated with the first SSB index; whether the target RO group includes the RO in the first symbol set depends on the number of ROs included in the target RO group.

[0091] The present application discloses a device for a second node used for wireless communication, comprising:

[0092] A second transmitter sends a first information block, wherein the first information block indicates a first symbol set;

[0093] a second receiver, receiving a random access preamble in a target RO group;

[0094] Among them, the receiver of the first information block determines the target RO group; the first symbol set includes at least one symbol configured as a downlink symbol by TDD uplink and downlink configuration signaling and used for uplink transmission; the target RO group includes at least one RO, and the ROs in the target RO group are all associated with the first SSB index; whether the target RO group includes the RO in the first symbol set depends on the number of ROs included in the target RO group.

[0095] As an embodiment, compared with the traditional solution, the present application has the following advantages but not limited to:

[0096] Supports multiple PRACH transmissions in full-duplex scenarios, which can further increase uplink coverage and reduce transmission delay;

[0097] Improving transmission reliability and robustness helps adapt to changing scenarios;

[0098] Reduce resource waste and redundancy and lower network costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0099] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0100] Figure 1 A flowchart showing first node transmission according to an embodiment of the present application is shown;

[0101] Figure 2 A schematic diagram of a network architecture according to an embodiment of the present application is shown;

[0102] Figure 3 A schematic diagram showing an embodiment of a wireless protocol architecture of a user plane and a control plane according to an embodiment of the present application;

[0103] Figure 4 A schematic diagram showing a first communication device and a second communication device according to an embodiment of the present application is shown;

[0104] Figure 5 A flow chart showing transmission between a first node and a second node according to an embodiment of the present application is shown;

[0105] Figure 6 A schematic diagram showing two cases of whether the target RO group includes the RO in the first symbol set according to an embodiment of the present application;

[0106] Figure 7 A schematic diagram showing that the number of ROs included in the target RO group according to an embodiment of the present application is greater than a first integer;

[0107] Figure 8 A schematic diagram showing a relationship between a first PRACH mask index value and a first RO group set according to an embodiment of the present application;

[0108] Fig. 9 A schematic diagram showing that the number of ROs included in the target RO group according to an embodiment of the present application is not greater than a first integer;

[0109] Fig.10 A schematic diagram showing two mapping modes according to an embodiment of the present application is shown;

[0110] Fig.11 A schematic diagram showing symbols in a first symbol set according to an embodiment of the present application;

[0111] Fig.12 A structural block diagram of a processing device used in a first node according to an embodiment of the present application is shown;

[0112] Fig.13 A structural block diagram of a processing device used in a second node according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0113] 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 in the present application and the features in the embodiments can be combined with each other arbitrarily.

[0114] Example 1

[0115] Embodiment 1 illustrates a flowchart of the first node transmission according to an embodiment of the present application, as shown in the attached Figure 1 As shown in the attached Figure 1 In the example, each box represents a step. In particular, the order of the steps in the box does not represent a specific time sequence between the steps.

[0116] In step 101, the first node receives a first information block indicating a first symbol set; in step 102, a target RO group is determined, and a random access preamble is sent in the target RO group.

[0117] In embodiment 1, the first symbol set includes at least one symbol configured as a downlink symbol by TDD uplink and downlink configuration signaling and used for uplink transmission; the target RO group includes at least one RO, and the ROs in the target RO group are all associated with the first SSB index; whether the target RO group includes the RO in the first symbol set depends on the number of ROs included in the target RO group.

[0118] As an embodiment, the RO refers to: PRACH (Physical Random Access CHannel, physical random access channel) Occasion, PRACH opportunity.

[0119] As an embodiment, the RO refers to: RACH (Random Access CHannel, random access channel) Occasion, RACH opportunity.

[0120] As an embodiment, the RO refers to: RA (Random Access) Occasion, RA opportunity.

[0121] As an embodiment, the TDD refers to: Time Division Duplex.

[0122] As an embodiment, the TDD refers to: Time Division Duplexing.

[0123] As an embodiment, the SSB refers to: Synchronization Signal Block.

[0124] As an embodiment, the SSB refers to: SS (Synchronization Signal) / PBCH (Physical Broadcast CHannel) block, synchronization signal / physical broadcast channel block.

[0125] Typically, the reception occasions of PBCH, PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal) are in consecutive symbols and form an SS / PBCH block.

[0126] As an embodiment, the first information block is carried by higher layer signaling.

[0127] As an embodiment, the first information block is carried by RRC (Radio Resource Control) signaling.

[0128] As an embodiment, the first information block includes information in at least one RRC IE (Information Element).

[0129] As an embodiment, the first information block includes part or all of the fields included in an RRC IE.

[0130] As an embodiment, the first information block includes part or all of the fields included in each RRC IE in multiple RRC IEs.

[0131] As an embodiment, the first information block includes part or all of the fields included in a SIB (System Information Block).

[0132] As an embodiment, the first information block includes part or all of the fields included in the MIB (Master Information Block).

[0133] As an embodiment, the first information block includes part or all of the fields included in SIB1 (System Information Block 1).

[0134] As an embodiment, the first information block includes part or all of the fields included in RMSI (Remaining Minimum System Information).

[0135] As an embodiment, the first information block is cell-common.

[0136] As an embodiment, the first information block is cell-specific.

[0137] As an embodiment, the first information block is group-common.

[0138] As an embodiment, the first information block is user equipment (UE-dedicated).

[0139] As an embodiment, the first information block is configured per subband.

[0140] As an embodiment, the first information block is configured per (per) BWP (BandWidth Part, partial bandwidth).

[0141] As an embodiment, the name of the RRC signaling carrying the first information block includes "TDD".

[0142] As an embodiment, the name of the RRC signaling carrying the first information block includes "DL".

[0143] As an embodiment, the name of the RRC signaling carrying the first information block includes "UL".

[0144] As an embodiment, the name of the RRC signaling carrying the first information block includes "Config".

[0145] As an embodiment, the name of the RRC signaling carrying the first information block includes "SBFD".

[0146] As an embodiment, the name of the RRC signaling carrying the first information block includes "subband".

[0147] As an embodiment, the name of the RRC signaling carrying the first information block includes "duplex".

[0148] As an embodiment, the first information block is carried by MACCE (Medium Access Control layerControl Element).

[0149] As an embodiment, the first information block includes information in at least one MAC CE.

[0150] As an embodiment, the first information block is carried by dynamic signaling.

[0151] As an embodiment, the first information block is carried by physical layer signaling.

[0152] As an embodiment, the first information block is carried by DCI (Downlink Control Information).

[0153] As an embodiment, the first information block includes information in at least one RRC IE and information in at least one DCI.

[0154] As an embodiment, the first information block includes part or all of the fields in a DCI format.

[0155] As an embodiment, the first information block includes part or all of the fields in DCI format 2_X, where X is a non-negative integer.

[0156] As an embodiment, the first information block includes part or all of the fields in DCI format 2_8.

[0157] As an embodiment, the first information block is used to configure SBFD (SubBand non-overlapping Full Duplex) time slots or symbols.

[0158] As an embodiment, the first information block is used to configure a time slot or symbol supporting full-duplex.

[0159] As an embodiment, the first symbol set includes at least one symbol.

[0160] As an embodiment, the first symbol set includes multiple symbols.

[0161] As an embodiment, the first symbol set includes a plurality of symbols, and the plurality of symbols are continuous.

[0162] As an embodiment, the first symbol set includes a plurality of symbols, and at least two symbols among the plurality of symbols are discontinuous.

[0163] As an embodiment, the symbols included in the first symbol set constitute one or more time slots.

[0164] As an embodiment, the first symbol set includes some symbols in a time slot.

[0165] As an embodiment, the first symbol set includes all symbols of each time slot in at least one time slot, and includes partial symbols of each time slot in at least one time slot.

[0166] Typically, one time slot described in this application includes 14 symbols.

[0167] As an embodiment, the time domain resource occupied by the symbols included in the first symbol set is a period.

[0168] As an embodiment, the first symbol set includes at least one full-duplex symbol.

[0169] As an embodiment, the first symbol set includes at least one SBFD symbol.

[0170] As an embodiment, all symbols included in the first symbol set are full-duplex symbols.

[0171] As an embodiment, all symbols included in the first symbol set are SBFD symbols.

[0172] Typically, the full-duplex symbols described in this application include SBFD symbols.

[0173] As an embodiment, the first information block explicitly indicates the first set of symbols.

[0174] As an embodiment, the first information block implicitly indicates the first set of symbols.

[0175] As an embodiment, the first information block indicates the time domain positions of the symbols included in the first symbol set.

[0176] As an embodiment, the first information block indicates a period of symbols included in the first symbol set.

[0177] As an embodiment, the first information block indicates the time slots occupied by the symbols included in the first symbol set.

[0178] As an embodiment, the first information block indicates the time domain position of the time slot included in the first symbol set.

[0179] As an embodiment, the first information block indicates the position of the time slots included in the first symbol set in a cycle.

[0180] As an embodiment, the first information block indicates the time domain positions of the symbols included in the first symbol set.

[0181] As an embodiment, the first information block indicates the positions of symbols included in the first symbol set in a time slot.

[0182] As an embodiment, the first information block indicates the positions of symbols included in the first symbol set in a period.

[0183] As an embodiment, the first information block indicates the positions of time slots occupied by symbols included in the first symbol set.

[0184] As an embodiment, the first information block indicates the position of the time slots occupied by the symbols included in the first symbol set in a cycle.

[0185] As an embodiment, the symbol described in the present application is a single-carrier symbol.

[0186] As an embodiment, the symbol described in the present application is a multi-carrier symbol.

[0187] As an embodiment, the multi-carrier symbol described in the present application is a SC-FDMA (Single Carrier-Frequency Division Multiple Access) symbol.

[0188] As an embodiment, the multi-carrier symbol in the present application is a FBMC (Filter Bank MultiCarrier) symbol.

[0189] As an embodiment, the multi-carrier symbol described in the present application is an OFDM (Orthogonal Frequency Division Multiplexing) symbol.

[0190] As an embodiment, the symbol described in the present application is obtained after the output of a transform precoding is subjected to OFDM symbol generation.

[0191] As an embodiment, the multi-carrier symbol described in the present application is a DFT-s-OFDM (Discrete Fourier Transform-spread-OF DM) symbol.

[0192] As an embodiment, the multi-carrier symbol described in the present application includes a CP (Cyclic Prefix).

[0193] As an embodiment, the first node determines a target RO group.

[0194] As an embodiment, the first node determines the target RO group by itself.

[0195] As an embodiment, the first node determines the target RO group from a set of RO groups.

[0196] As an embodiment, the first node determines the target RO group from a set of RO groups with equal probability.

[0197] As an embodiment, the first node determines the target RO group from a set of RO groups in a relevant manner.

[0198] As an embodiment, the first node randomly determines the target RO group from a set of RO groups.

[0199] Typically, the ROs included in an RO group in the present application are orthogonal in the time domain.

[0200] Typically, at least some of the ROs included in an RO group in the present application are orthogonal in the time domain.

[0201] As an embodiment, the RO group in the present application includes multiple ROs.

[0202] As an embodiment, the RO group in the present application includes multiple ROs that are orthogonal in the time domain.

[0203] As an embodiment, the multiple ROs included in the RO group in the present application are associated with one SSB index.

[0204] As an embodiment, the multiple ROs included in the RO group in the present application adopt the same spatial transmission parameters.

[0205] As an embodiment, the preambles sent by any two ROs in the RO group in the present application are QCL.

[0206] As an embodiment, the QCL described in this application refers to: Quasi Co-Location.

[0207] As an embodiment, the QCL described in this application refers to: Quasi Co-Located.

[0208] As an embodiment, the QCL includes QCL parameters.

[0209] As an embodiment, the QCL includes a QCL assumption.

[0210] As an embodiment, the QCL types include typeA, typeB, typeC and typeD.

[0211] As an embodiment, the QCL parameters of the QCL type A include Doppler shift, Doppler spread, average delay and delay spread.

[0212] As an embodiment, the QCL parameters of the QCL type B include Doppler shift and Doppler spread.

[0213] As an embodiment, the QCL parameters of the QCL type C include Doppler shift and average delay.

[0214] As an embodiment, the QCL parameter of the QCL type D includes a spatial reception parameter (spatial Rx parameter).

[0215] As an embodiment, the QCL includes at least one of Doppler shift, Doppler spread, average delay, delay spread, spatial Tx parameter or spatial Rx parameter.

[0216] As an embodiment, the specific definitions of the typeA, the typeB, the typeC and the typeD refer to Chapter 5.1.5 of 3GPP (3rd Generation Partner Project) TS (Technical Specification) 38.214.

[0217] As an embodiment, the target RO group includes at least one RO.

[0218] As an embodiment, the number of ROs included in the target RO group is predefined.

[0219] As an embodiment, the number of ROs included in the target RO group is indicated by the sender of the first information block.

[0220] As an embodiment, the number of ROs included in the target RO group is configured by the sender of the first information block.

[0221] As an embodiment, the target RO group includes N ROs, where N is a configurable positive integer greater than 1.

[0222] As a sub-embodiment of this embodiment, the value of N is configured through RRC signaling.

[0223] As a sub-embodiment of this embodiment, the value of N is indicated by MAC CE.

[0224] As an embodiment, the target RO group includes 2 ROs.

[0225] As an embodiment, the target RO group includes 4 ROs.

[0226] As an embodiment, the target RO group includes 8 ROs.

[0227] As an embodiment, the target RO group includes 16 ROs.

[0228] As an embodiment, the target RO group includes 32 ROs.

[0229] As an embodiment, the ROs included in the target RO group may be used for legacy PRACH transmission.

[0230] As an embodiment, the legacy PRACH transmission described in the present application refers to a single PRACH transmission.

[0231] As an embodiment, the legacy PRACH transmission described in the present application refers to PRACH transmission before Rel-18 (Release-18).

[0232] As an embodiment, the ROs in the target RO group are only used for multiple PRACH transmissions.

[0233] As an embodiment, the ROs in the target RO group are only used for PRACH repetition.

[0234] As an embodiment, the ROs in the target RO group are only used for PRACH transmission in Rel-18 and later.

[0235] As an embodiment, the RO described in the present application occupies at least one symbol in the time domain.

[0236] As an embodiment, the RO described in the present application occupies at least one subcarrier in the frequency domain.

[0237] As an embodiment, the RO described in this application occupies at least one RE (Resource Element).

[0238] Typically, one RE occupies one symbol in the time domain and one subcarrier in the frequency domain.

[0239] As an embodiment, the frequency domain resources occupied by the RO described in this application belong to a UL (UpLink) carrier.

[0240] As an embodiment, the frequency domain resources occupied by the RO described in the present application belong to a UL carrier or a DL (DownLink) carrier.

[0241] As an embodiment, the UL carrier described in the present application includes a normal uplink (Normal UL, NUL) carrier.

[0242] As an embodiment, the UL carrier described in the present application includes a supplementary uplink (Supplementary UL, SUL) carrier.

[0243] As an embodiment, the RO described in this application corresponds to one or more preambles.

[0244] As an embodiment, the RO described in the present application corresponds to one or more leading indexes.

[0245] As an embodiment, the RO described in the present application corresponds to one or more leading sequences.

[0246] As an embodiment, the RO described in the present application is allowed to be used to transmit one or more preambles.

[0247] As an embodiment, the RO described in the present application is allowed to be used to transmit one or more preamble indexes.

[0248] As an embodiment, the RO described in the present application is allowed to be used to transmit one or more preamble sequences.

[0249] As an embodiment, the RO described in the present application is configured to transmit one or more preambles.

[0250] As an embodiment, the RO described in the present application is configured to transmit one or more preamble indexes.

[0251] As an embodiment, the RO described in the present application is configured to transmit one or more preamble sequences.

[0252] As an embodiment, the preamble described in the present application includes a random access preamble.

[0253] As an embodiment, the preamble described in the present application includes a preamble sequence.

[0254] As an embodiment, the preamble described in the present application includes a pseudo-random sequence.

[0255] As an embodiment, the preamble described in the present application includes a ZC (Zaddoff Chu) sequence.

[0256] As an embodiment, the first node sends the random access preamble in the target RO group.

[0257] As an embodiment, the first node sends the random access preamble on each RO in the target RO group.

[0258] As an embodiment, the first node sends the same random access preamble on each RO in the target RO group.

[0259] As a sub-embodiment of this embodiment, the same random access preamble refers to: the same preamble sequence.

[0260] As a sub-embodiment of this embodiment, the same random access preamble refers to: the same preamble index.

[0261] As an embodiment, the first node sends the random access preamble on each RO in the target RO group using the same power.

[0262] As an embodiment, the first node does not apply power ramping when sending the random access preamble on any two ROs in the target RO group.

[0263] As an embodiment, the random access preamble sent by the first node in the target RO group is used for legacy PRACH transmission.

[0264] As an embodiment, the random access preamble sent by the first node in the target RO group is only used for multiple PRACH transmissions.

[0265] As an embodiment, the random access preamble sent by the first node in the target RO group is only used for PRACH repetition.

[0266] As an embodiment, the random access preamble sent by the first node in the target RO group is selected by a MAC entity of the first node from among random access preambles used for contention based random access (Contention Based Random Access, CBRA).

[0267] As an embodiment, the random access preamble sent by the first node in the target group RO is allocated by the sender of the first information block.

[0268] As an embodiment, the random access preamble sent by the first node in the target group RO is configured by the sender of the first information block.

[0269] As an embodiment, the random access preamble sent by the first node in the target group RO is indicated by the sender of the first information block.

[0270] As an embodiment, the first symbol set includes at least one symbol configured as a downlink symbol by the TDD uplink and downlink configuration signaling and used for uplink transmission.

[0271] As an embodiment, the TDD uplink and downlink configuration signaling includes higher layer signaling.

[0272] As an embodiment, the TDD uplink and downlink configuration signaling includes semi-static signaling.

[0273] As an embodiment, the TDD uplink and downlink configuration signaling includes cell common signaling.

[0274] As an embodiment, the TDD uplink and downlink configuration signaling includes UE group common signaling.

[0275] As an embodiment, the TDD uplink and downlink configuration signaling includes UE-specific signaling.

[0276] As an embodiment, the link direction configuration configured by the TDD uplink and downlink configuration signaling is applicable to the entire frequency band occupied by the service cell to which it belongs.

[0277] As an embodiment, the link direction configuration configured by the TDD uplink and downlink configuration signaling is applicable to the entire carrier to which it belongs.

[0278] As an embodiment, the TDD uplink and downlink configuration signaling includes RRC signaling.

[0279] As an embodiment, the TDD uplink and downlink configuration signaling includes one or more RRC IEs.

[0280] As an embodiment, the TDD uplink and downlink configuration signaling includes multiple RRC IEs.

[0281] As an embodiment, the TDD uplink and downlink configuration signaling includes one or more fields of each RRC IE in multiple RRC IEs.

[0282] As an embodiment, the TDD uplink and downlink configuration signaling is an RRC IE.

[0283] As an embodiment, the TDD uplink and downlink configuration signaling is one or more fields in an RRC IE.

[0284] As an embodiment, the TDD uplink and downlink configuration signaling includes TDD-UL-DL-ConfigCommon IE.

[0285] As an embodiment, the TDD uplink and downlink configuration signaling includes TDD-UL-DL-ConfigDedicatedIE.

[0286] As an embodiment, the TDD uplink and downlink configuration signaling includes TDD-UL-DL-ConfigCommon IE and TDD-UL-DL-ConfigDedicated IE.

[0287] As an embodiment, the TDD uplink and downlink configuration signaling includes at least the former of TDD-UL-DL-ConfigCommon IE and TDD-UL-DL-ConfigDedicated IE.

[0288] As an embodiment, the TDD uplink and downlink configuration signaling includes a TDD-UL-DL-Pattern field.

[0289] As an embodiment, the TDD uplink and downlink configuration signaling indicates the downlink time slot and downlink symbol within the period.

[0290] As an embodiment, at least one time slot in the TDD uplink and downlink configuration signaling indication period is a downlink time slot and / or at least one symbol is a downlink symbol.

[0291] As an embodiment, the TDD uplink and downlink configuration signaling indicates at least one time slot format, and the at least one time slot format is used to determine at least one downlink symbol.

[0292] As an embodiment, the TDD uplink and downlink configuration signaling is used to indicate at least one time slot including only downlink symbols and at least one downlink symbol after the time slot including only downlink symbols from one cycle.

[0293] As an embodiment, the TDD uplink and downlink configuration signaling indicates the number of starting downlink time slots within a cycle, the number of downlink symbols immediately following the starting downlink time slot, and the cycle length.

[0294] As an embodiment, the TDD uplink and downlink configuration signaling is used to indicate at least one pattern, and any pattern indicated by the TDD uplink and downlink configuration signaling provides a time slot configuration cycle length, the number of time slots including only downlink symbols, the number of downlink symbols, the number of time slots including only uplink symbols, and the number of uplink symbols.

[0295] As an embodiment, the TDD uplink and downlink configuration signaling is used to indicate at least one pattern, and the at least one pattern indicated by the TDD uplink and downlink configuration signaling provides at least one time slot including only downlink symbols and at least one downlink symbol that does not belong to a time slot including only downlink symbols in a period.

[0296] As an embodiment, the TDD uplink and downlink configuration signaling includes MAC CE.

[0297] As an embodiment, the TDD uplink and downlink configuration signaling includes dynamic signaling.

[0298] As an embodiment, the TDD uplink and downlink configuration signaling includes physical layer signaling.

[0299] As an embodiment, the TDD uplink and downlink configuration signaling includes layer 1 (Layer 1, L1) signaling.

[0300] As an embodiment, the TDD uplink and downlink configuration signaling includes DCI.

[0301] As an embodiment, the CRC (Cyclic Redundancy Check) of the TDD uplink and downlink configuration signaling is scrambled by a cell-common RNTI (Radio Network Temporary Identifier).

[0302] As an embodiment, the CRC of the TDD uplink and downlink configuration signaling is scrambled by the common RNTI of the UE group.

[0303] As an embodiment, the CRC of the TDD uplink and downlink configuration signaling is scrambled by SFI (Slot Format Indicator)-RNTI.

[0304] As an embodiment, the TDD uplink and downlink configuration signaling DCI is SFI.

[0305] As an embodiment, the format adopted by the TDD uplink and downlink configuration signaling is DCI format2_0.

[0306] As an embodiment, the TDD uplink and downlink configuration signaling includes RRC layer signaling and physical layer signaling.

[0307] As an embodiment, the TDD uplink and downlink configuration signaling is carried jointly by RRC layer signaling and physical layer signaling.

[0308] As a sub-embodiment of this embodiment, the RRC signaling includes at least the former of TDD-UL-DL-ConfigCommon IE and TDD-UL-DL-ConfigDedicated IE.

[0309] As a sub-embodiment of this embodiment, the physical layer signaling includes a partial or entire field of a DCI.

[0310] As a sub-embodiment of this embodiment, the physical layer signaling is SFI.

[0311] As an embodiment, the first information block includes the TDD uplink and downlink configuration signaling.

[0312] As an embodiment, the first information block is carried by the TDD uplink and downlink configuration signaling.

[0313] As an embodiment, the first information block includes part of the information in the TDD uplink and downlink configuration signaling.

[0314] As an embodiment, the first information block and the TDD uplink and downlink configuration signaling belong to different domains of the same RRC IE.

[0315] As a sub-embodiment of this embodiment, the benefits of the above method include: saving signaling overhead.

[0316] As an embodiment, the first information block and the TDD uplink and downlink configuration signaling belong to different RRC IEs.

[0317] As a sub-embodiment of this embodiment, the benefits of the above method include: flexible indication.

[0318] As an embodiment, the first SSB index is an SSB Index.

[0319] As an embodiment, the first SSB index is an SSB-Index.

[0320] As an embodiment, the first SSB index is a non-negative integer.

[0321] As an embodiment, the first SSB index is no greater than 7.

[0322] As an embodiment, the first SSB index is no greater than 63.

[0323] As an embodiment, the first SSB index identifies an SSB.

[0324] As an embodiment, the SSB identified by the first SSB index is transmitted within an SSB period.

[0325] As an embodiment, the SSB identified by the first SSB index is transmitted in a SSB burst set (discovery burst).

[0326] As an embodiment, the information of one SSB cycle described in the present application is carried by SIB1.

[0327] As an embodiment, the duration of one SSB cycle described in the present application is 5 ms (millisecond).

[0328] As an embodiment, the SSB transmitted in an SSB cycle described in the present application is indicated by the sender of the first information block.

[0329] As an embodiment, the SSB transmitted in an SSB cycle described in the present application is configured by the sender of the first information block.

[0330] As an embodiment, the period information of an SSB burst set described in the present application is carried by SIB1.

[0331] As an embodiment, the period of an SSB burst set described in the present application is 5ms.

[0332] As an embodiment, the SSB transmitted in an SSB burst set described in the present application is indicated by the sender of the first information block.

[0333] As an embodiment, the SSB transmitted in an SSB burst set described in the present application is configured by the sender of the first information block.

[0334] As an embodiment, the first node assumes that the period of an SSB burst set described in the present application is equal to an SSB period described in the present application.

[0335] As an embodiment, the first SSB index is mapped to at least one RO.

[0336] As an embodiment, all ROs in the target RO group are associated with the first SSB index.

[0337] As an embodiment, the first SSB index is mapped to a RO in the target RO group.

[0338] As an embodiment, each RO in the target RO group is associated with the first SSB index.

[0339] As an embodiment, the first SSB index is mapped to each RO in the target RO group.

[0340] As an embodiment, the target RO group is associated with the first SSB index.

[0341] As an embodiment, the first SSB index is mapped to the target RO group.

[0342] As an embodiment, the first node determines the target RO group from an RO group set, and each RO group in the RO group set is associated with the first SSB index.

[0343] As an embodiment, the random access preamble sent by the first node in any RO in the target RO group is associated with the first SSB index.

[0344] As an embodiment, the first SSB index is mapped to the random access preamble transmitted in any RO in the target RO group.

[0345] As an embodiment, the random access preamble sent by the first node in the target RO group is associated with the first SSB index.

[0346] As an embodiment, the first SSB index is mapped to the random access preamble transmitted in the target RO group.

[0347] As an embodiment, the receiver of the random access preamble can determine the first SSB index based on the RO in the target RO group and the random access preamble sent in the target RO group.

[0348] As an embodiment, the receiver of the random access preamble can determine the first SSB index based on the target RO group and the random access preamble sent in the target RO group.

[0349] As an embodiment, whether the target RO group includes the ROs in the first symbol set depends on the number of ROs included in the target RO group.

[0350] As an embodiment, the target RO group includes ROs in the first symbol set.

[0351] As an embodiment, the target RO group does not include ROs in the first symbol set.

[0352] As an embodiment, the target RO group includes ROs in the first symbol set and ROs outside the first symbol set.

[0353] As an embodiment, the “RO in the first symbol set” means that the time domain resources occupied by the RO include the first symbol set.

[0354] As an embodiment, the “RO in the first symbol set” means that the time domain resources occupied by the RO belong to the first symbol set.

[0355] As an embodiment, the “RO in the first symbol set” means that the time domain resources occupied by the RO overlap with the first symbol set.

[0356] As an embodiment, the “RO in the first symbol set” means that at least one symbol among the symbols occupied by the RO belongs to the first symbol set.

[0357] As an embodiment, the “RO in the first symbol set” means that all symbols occupied by the RO belong to the first symbol set.

[0358] As an embodiment, the “RO outside the first symbol set” means that the time domain resources occupied by the RO do not include the first symbol set.

[0359] As an embodiment, the “RO outside the first symbol set” means that the time domain resources occupied by the RO do not belong to the first symbol set.

[0360] As an embodiment, the “RO outside the first symbol set” means that the time domain resources occupied by the RO are orthogonal to the first symbol set.

[0361] As an embodiment, the “RO outside the first symbol set” means that the symbol occupied by the RO does not belong to the first symbol set.

[0362] As an embodiment, the “RO outside the first symbol set” means that the RO does not occupy a symbol in the first symbol set.

[0363] As an embodiment, when the number of ROs included in the target RO group is not greater than a first integer, the first node determines whether the target RO group includes ROs in the first symbol set; when the number of ROs included in the target RO group is greater than a first integer, the target RO group does not include ROs in the first symbol set; the first integer is a positive integer.

[0364] As a sub-embodiment of this embodiment, the benefits of the above method include: when the number of ROs included in the target RO group is not greater than the first integer, the first node in the present application can determine whether the target RO group includes ROs occupying full-duplex symbols based on measured interference and other schemes, which is conducive to improving the reliability and robustness of transmission and adapting to ever-changing scenarios.

[0365] As a sub-embodiment of this embodiment, the benefits of the above method include: compared with half-duplex symbols, the interference environment on full-duplex symbols is more complex. Therefore, when the number of ROs included in the target RO group is greater than the first integer, the target RO group does not include ROs occupying full-duplex symbols, which can reduce the implementation complexity while ensuring uplink coverage.

[0366] Typically, when the number of ROs included in the target RO group is not greater than a first integer, the target RO group includes the ROs in the first symbol set; when the number of ROs included in the target RO group is greater than a first integer, the target RO group does not include the ROs in the first symbol set; the first integer is a positive integer.

[0367] As an embodiment, the benefits of the above method include: when the number of ROs included in the target RO group is not greater than the first integer, the target RO group includes ROs occupying full-duplex symbols, which can further improve uplink coverage and reduce latency.

[0368] As an embodiment, when the number of ROs included in the target RO group is greater than a second integer and not greater than a first integer, the first node determines whether the target RO group includes ROs in the first symbol set; when the number of ROs included in the target RO group is not greater than the second integer or greater than the first integer, the target RO group does not include ROs in the first symbol set; the first integer and the second integer are both positive integers.

[0369] Typically, when the number of ROs included in the target RO group is greater than a second integer and not greater than a first integer, the target RO group includes ROs in the first symbol set; when the number of ROs included in the target RO group is not greater than the second integer or greater than the first integer, the target RO group does not include ROs in the first symbol set; the first integer and the second integer are both positive integers.

[0370] As an embodiment, the benefits of the above method include: when the second integer is equal to 1, the target RO group includes only 1 RO, the method is applicable to a single PRACH transmission, and the RO transmission random access preamble occupying the full-duplex symbol is not used. It has good backward compatibility and can be applicable to terminals with different capabilities.

[0371] As an embodiment, when the number of ROs included in the target RO group is not greater than a first integer, the target RO group does not include ROs in the first symbol set; when the number of ROs included in the target RO group is greater than a first integer, the first node determines whether the target RO group includes ROs in the first symbol set; the first integer is a positive integer.

[0372] As a sub-embodiment of this embodiment, the benefits of the above method include: when the number of ROs in the target RO group is not greater than the first integer, the first node does not use the ROs occupying full-duplex symbols to improve the success rate of the random access process.

[0373] As a sub-embodiment of this embodiment, the benefits of the above method include: using RO and PRACH repeated transmissions in the first symbol set can improve uplink coverage and reduce latency, and when the number of ROs in the target RO group is greater than the first integer, the first node determines whether sending a random access preamble in the RO occupying full-duplex symbols can achieve a balance between resource utilization and uplink coverage.

[0374] Typically, when the number of ROs included in the target RO group is not greater than a first integer, the target RO group does not include ROs in the first symbol set; when the number of ROs included in the target RO group is greater than a first integer, the target RO group includes ROs in the first symbol set; the first integer is a positive integer.

[0375] As a sub-embodiment of this embodiment, the benefits of the above method include: when the number of ROs in the target RO group is greater than the first integer, not sending a random access preamble in a RO occupying a full-duplex symbol can avoid PRACH resource waste and save power.

[0376] As an embodiment, when the number of ROs included in the target RO group is greater than a second integer and not greater than a first integer, the target RO group does not include ROs in the first symbol set; when the number of ROs included in the target RO group is not greater than the second integer or greater than the first integer, the first node determines whether the target RO group includes ROs in the first symbol set; the first integer and the second integer are both positive integers.

[0377] Typically, when the number of ROs included in the target RO group is greater than a second integer and not greater than a first integer, the target RO group does not include ROs in the first symbol set; when the number of ROs included in the target RO group is not greater than the second integer or greater than the first integer, the target RO group includes ROs in the first symbol set; the first integer and the second integer are both positive integers.

[0378] As a sub-embodiment of this embodiment, the benefits of the above method include: when the second integer is equal to 1, the target RO group includes only 1 RO, the method is applicable to a single PRACH transmission, and the present application enhances and optimizes the random access process design, improves uplink coverage, and reduces transmission delay.

[0379] Example 2

[0380] Embodiment 2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application, as shown in the attached Figure 2 shown.

[0381] Attached Figure 2The network architecture of LTE (Long-Term Evolution), LTE-A (Long-Term Evolution Advanced) and future 5G systems is described. The network architecture of LTE, LTE-A and future 5G systems is called EPS (Evolved Packet System). The 5GNR or LTE network architecture may be referred to as 5GS (5G System) / EPS200 or some other appropriate terminology. 5GS / EPS200 may include one or more UEs 201, a UE 241 communicating with UE 201 via a sidelink, NG-RAN (Next Generation Radio Access Network) 202, 5G-CN (5G Core Network) / EPC (Evolved Packet Core) 210, HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and Internet service 230. 5GS / EPS200 may be interconnected with other access networks, but these entities / interfaces are not shown for simplicity. Figure 2As shown, the 5GS / EPS200 provides packet-switched services, however, those skilled in the art will readily appreciate that the various concepts presented throughout this application can be extended to networks that provide circuit-switched services. NG-RAN 202 includes NR Node B (gNB) 203 and other gNBs 204. gNB 203 provides user and control plane protocol terminations toward UE 201. gNB 203 can be connected to other gNBs 204 via an Xn interface (e.g., backhaul). gNB 203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), a TRP (Transmitter Receiver Point), or some other suitable term. gNB 203 provides an access point to 5G-CN / EPC 210 for UE 201. Examples of UE 201 include cellular phones, smart phones, Session Initiation Protocol (SIP) phones, laptop computers, Personal Digital Assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband physical network devices, machine type communication devices, land vehicles, cars, wearable devices, or any other similar functional devices. Those skilled in the art may also refer to UE 201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term. gNB 203 is connected to 5G-CN / EPC 210 via S1 / NG interface. 5G-CN / EPC 210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMF 214, S-GW (Service Gateway) / UPF (User Plane Function) 212 and P-GW (Packet Data Network Gateway) / UPF 213.MME / AMF / SMF 211 is a control node that handles signaling between UE 201 and 5G-CN / EPC 210. In general, MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through S-GW / UPF 212, and S-GW / UPF 212 itself is connected to P-GW / UPF 213. P-GW provides UE IP address allocation and other functions. P-GW / UPF 213 is connected to Internet services 230. Internet services 230 include operator-corresponding Internet protocol services, which may specifically include Internet, Intranet, IMS (IP Multimedia Subsystem) and packet switching services.

[0382] As an embodiment, the first node in the present application includes the UE 201.

[0383] As an embodiment, the second node in the present application includes the gNB 203.

[0384] As an embodiment, the UE 201 supports relay transmission.

[0385] As an embodiment, the UE 201 includes a mobile phone.

[0386] As an embodiment, the UE 201 is a vehicle including a car.

[0387] As an embodiment, the gNB 203 is a macro cell base station.

[0388] As an embodiment, the gNB 203 is a micro cell base station.

[0389] As an embodiment, the gNB 203 is a pico cell base station.

[0390] As an embodiment, the gNB 203 is a home base station (Femtocell).

[0391] As an embodiment, the gNB 203 is a base station device that supports a large delay difference.

[0392] As an embodiment, the gNB 203 is a flying platform device.

[0393] As an embodiment, the gNB 203 is a satellite device.

[0394] As an embodiment, the gNB 203 is a test device (e.g., a transceiver that simulates some functions of a base station, a signaling tester).

[0395] As an embodiment, the wireless link from the UE 201 to the gNB 203 is an uplink, and the uplink is used to perform uplink transmission.

[0396] As an embodiment, the wireless link from the gNB 203 to the UE 201 is a downlink, and the downlink is used to perform downlink transmission.

[0397] As an embodiment, the wireless link between the UE 201 and the gNB 203 includes a cellular network link.

[0398] As an embodiment, the UE 201 and the gNB 203 are connected via a Uu air interface.

[0399] As an embodiment, the sender of the first information block includes the gNB 203.

[0400] As an embodiment, the receiver of the first information block includes the UE 201.

[0401] As an embodiment, the sender of the random access preamble includes the UE 201.

[0402] As an embodiment, the recipient of the random access preamble includes the gNB 203.

[0403] As an embodiment, the gNB 203 supports SBFD.

[0404] As an embodiment, the gNB 203 supports a more flexible duplex mode or a full-duplex mode.

[0405] As an embodiment, the UE 201 supports SBFD.

[0406] As an embodiment, the UE 201 supports a more flexible duplex mode or a full-duplex mode.

[0407] As an embodiment, the UE 201 supports enhanced PRACH transmission.

[0408] As an embodiment, the UE 201 supports PRACH repetition.

[0409] As an embodiment, the gNB 203 supports enhanced PRACH transmission.

[0410] As an embodiment, the gNB 203 supports PRACH repetition.

[0411] Example 3

[0412] Embodiment 3 illustrates a schematic diagram of an embodiment of a wireless protocol architecture of a user plane and a control plane according to an embodiment of the present application, as shown in the attached figure. Figure 3 shown.

[0413] Figure 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300, Figure 3The radio protocol architecture of the control plane 300 for a first communication node device (RSU (Road Side Unit) in UE or V2X (Vehicle to Everything), vehicle-mounted device or vehicle-mounted communication module) and a second node device (gNB, RSU in UE or V2X, vehicle-mounted device or vehicle-mounted communication module), or between two UEs is shown in three layers: Layer 1 (Layer 1, L1), Layer 2 (Layer 2, L2) and Layer 3 (Layer 3, L3). L1 is the lowest layer and implements various PHY (PHYsical layer) signal processing functions. L1 will be referred to as PHY 301 in this article. L2 305 is above PHY 301 and is responsible for the link between the first node device and the second node device, or between two UEs through PHY 301. L2305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304, which 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 inter-zone mobility support for the first communication node device between the second communication node device. 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 caused by HARQ (Hybrid Automatic Repeat reQuest process number). 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 communication node devices. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in L3 in the control plane 300 is responsible for obtaining radio resources (ie, radio bearers) and configuring lower layers using RRC signaling between the second communication node device and the first communication node device.The radio protocol architecture of the user plane 350 includes layer 1 (L1) and layer 2 (L2). The radio protocol architecture for the first communication node device and the second communication 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 L2355, the RLC sublayer 353 in L2355, and the MAC sublayer 352 in L2355, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead. L2355 in the user plane 350 also includes a SDAP (Service Data Adaptation Protocol) sublayer 356, which is responsible for mapping between QoS (Quality of Service) flows and data radio bearers (DRBs) to support the diversity of services. Although not shown in the figure, the first communication node device may have several upper layers above L2355, including a network layer (e.g., IP (Internet Protocol) layer) terminating at the P-GW on the network side and an application layer terminating at the other end of the connection (e.g., a remote UE, a server, etc.).

[0414] As an example, Figure 3 The wireless protocol architecture in is applicable to the first node in this application.

[0415] As an example, Figure 3 The wireless protocol architecture in is applicable to the second node in this application.

[0416] As an embodiment, the first information block is generated in the RRC 306.

[0417] As an embodiment, the first information block is generated in the MAC sublayer 302 or the MAC sublayer 352.

[0418] As an embodiment, the first information block is generated by the PHY 301 or PHY 351.

[0419] As an embodiment, the random access preamble is generated by the PHY 301 or PHY 351.

[0420] As an embodiment, the higher layer in the present application refers to a layer above the physical layer.

[0421] As an embodiment, the higher layer in the present application includes a MAC layer.

[0422] As an embodiment, the higher layer in the present application includes an RRC layer.

[0423] Example 4

[0424] Embodiment 4 illustrates a schematic diagram of a first communication device and a second communication device according to an embodiment of the present application, as shown in the attached figure. Figure 4 Attached Figure 4 is a block diagram of a first communication device 410 and a second communication device 450 communicating with each other in an access network.

[0425] The first communication device 410 includes a controller / processor 475 , a memory 476 , a receive processor 470 , a transmit processor 416 , a multi-antenna receive processor 472 , a multi-antenna transmit processor 471 , a transmitter / receiver 418 and an antenna 420 .

[0426] The second communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmit processor 468, a receive processor 456, a multi-antenna transmit processor 457, a multi-antenna receive processor 458, a transmitter / receiver 454 and an antenna 452.

[0427] In transmission from the first communication device 410 to the second communication device 450, at the first communication device 410, upper layer data packets from the core network are provided to the controller / processor 475. The controller / processor 475 implements the functionality of L2. In the DL, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and allocation of radio resources to the second communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for HARQ operations, retransmission of lost packets, and signaling to the second communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for L1 (i.e., physical layer). The transmit processor 416 implements coding and interleaving to facilitate forward error correction (FEC) at the second communication device 450, as well as mapping of signal constellations based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-PSK, M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding on the coded and modulated symbols, including codebook-based precoding and non-codebook-based precoding and beamforming processing, to generate one or more parallel streams. The transmit processor 416 then maps each parallel stream to a subcarrier, multiplexes the modulated symbols with a reference signal (e.g., pilot) in the time domain and / or frequency domain, and then uses an Inverse Fast Fourier Transform (IFFT) to generate a physical channel carrying a time domain multi-carrier symbol stream. The multi-antenna transmit processor 471 then performs a transmit analog precoding / beamforming operation on the time domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream, and then provides it to different antennas 420.

[0428] In the transmission from the first communication device 410 to the second communication device 450, at the second communication device 450, each receiver 454 receives a signal through its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the RF carrier and converts the RF stream into a baseband multi-carrier symbol stream and provides it to the receiving processor 456. The receiving processor 456 and the multi-antenna receiving processor 458 implement various signal processing functions of L1. The multi-antenna receiving processor 458 performs a receiving analog precoding / beamforming operation on the baseband multi-carrier symbol stream from the receiver 454. The receiving processor 456 uses a fast Fourier transform (FFT) to convert the baseband multi-carrier symbol stream after the receiving analog precoding / beamforming operation from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receiving processor 456, where the reference signal will be used for channel estimation, and the data signal is recovered after multi-antenna detection in the multi-antenna receiving processor 458 to any parallel stream with the second communication device 450 as the destination. The symbols on each parallel stream are demodulated and recovered in the receiving processor 456, and soft decisions are generated. The receiving processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the first communication device 410 on the physical channel. The upper layer data and control signals are then provided to the controller / processor 459. The controller / processor 459 implements the functions of L2. The controller / processor 459 may be associated with a memory 460 storing program codes and data. The memory 460 may be referred to as a computer-readable medium. In DL, the controller / processor 459 provides multiplexing, packet reassembly, decryption, header decompression, and control signal processing between the transmission and logical channels to recover the upper layer data packets from the core network. The upper layer data packets are then provided to all protocol layers above L2. Various control signals may also be provided to L3 for L3 processing. The controller / processor 459 is also responsible for error detection using an acknowledgment (ACK) and / or a negative acknowledgment (NACK) protocol to support HARQ operations.

[0429] In the transmission from the second communication device 450 to the first communication device 410, at the second communication device 450, a data source 467 is used to provide upper layer data packets to the controller / processor 459. The data source 467 represents all protocol layers above L2. Similar to the transmission function at the first communication device 410 described in DL, the controller / processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on the radio resource allocation of the first communication device 410, and implements L2 functions for the user plane and the control plane. The controller / processor 459 is also responsible for HARQ operations, retransmission of lost packets, and signaling to the first communication device 410. The transmit processor 468 performs modulation mapping and channel coding processing, and the multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing. Then, the transmit processor 468 modulates the generated parallel stream into a multi-carrier / single-carrier symbol stream, which is then provided to different antennas 452 via the transmitter 454 after analog precoding / beamforming operations in the multi-antenna transmit processor 457. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency symbol stream, and then provides it to the antenna 452.

[0430] In the transmission from the second communication device 450 to the first communication device 410, the function at the first communication device 410 is similar to the reception function at the second communication device 450 described in the transmission from the first communication device 410 to the second communication device 450. Each receiver 418 receives a radio frequency signal through its corresponding antenna 420, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to the multi-antenna reception processor 472 and the reception processor 470. The reception processor 470 and the multi-antenna reception processor 472 jointly implement the functions of L1. The controller / processor 475 implements the L2 functions. The controller / processor 475 can be associated with a memory 476 storing program codes and data. The memory 476 can be referred to as a computer-readable medium. The controller / processor 475 provides demultiplexing between transmission and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover the upper layer data packets from the second communication device 450. The upper layer data packets from the controller / processor 475 can be provided to the core network. The controller / processor 475 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.

[0431] As an embodiment, the second communication device 450 includes: at least one processor and at least one memory, the at least one memory includes 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 communication device 450 device at least receives a first information block, the first information block indicates a first symbol set; determines a target RO group, and sends a random access preamble in the target RO group; the first symbol set includes at least one symbol configured as a downlink symbol by TDD uplink and downlink configuration signaling and used for uplink transmission; the target RO group includes at least one RO, and the ROs in the target RO group are all associated with a first SSB index; whether the target RO group includes the RO in the first symbol set depends on the number of ROs included in the target RO group. .

[0432] As an embodiment, the second communication device 450 includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates actions when executed by at least one processor, and the actions include: receiving a first information block; determining a target RO group, and sending a random access preamble in the target RO group.

[0433] As an embodiment, the first communication device 410 includes: at least one processor and at least one memory, the at least one memory includes 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 first communication device 410 device at least sends a first information block, the first information block indicates a first symbol set; receives a random access preamble in a target RO group; the receiver of the first information block determines the target RO group; the first symbol set includes at least one symbol configured as a downlink symbol by TDD uplink and downlink configuration signaling and used for uplink transmission; the target RO group includes at least one RO, and the ROs in the target RO group are all associated with a first SSB index; whether the target RO group includes the ROs in the first symbol set depends on the number of ROs included in the target RO group.

[0434] As an embodiment, the first communication device 410 includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates actions when executed by at least one processor, and the actions include: sending a first information block; receiving a random access preamble in a target RO group.

[0435] As an embodiment, the first node in the present application includes the second communication device 450.

[0436] As an embodiment, the second node in the present application includes the first communication device 410.

[0437] As an embodiment, at least one of {the antenna 420, the transmitter 418, the transmit processor 416, the multi-antenna transmit processor 471, the controller / processor 475, and the memory 476} is used to send a first information block; and at least one of {the antenna 452, the receiver 454, the receive processor 456, the multi-antenna receive processor 458, the controller / processor 459, the memory 460, and the data source 467} is used to receive a first information block.

[0438] As an embodiment, at least one of {the antenna 452, the transmitter 454, the transmit processor 468, the multi-antenna transmit processor 457, the controller / processor 459, the memory 460, and the data source 467} is used to determine a target RO group and send a random access preamble in the target RO group; and at least one of {the antenna 420, the receiver 418, the receive processor 470, the multi-antenna receive processor 472, the controller / processor 475, and the memory 476} is used to receive a random access preamble in the target RO group.

[0439] Example 5

[0440] Embodiment 5 illustrates a flow chart of transmission between a first node and a second node according to an embodiment of the present application. Figure 5 In the embodiment, the first node U1 communicates with the second node N2 via a wireless link, and the steps in blocks F51, F52 and F53 are optional. It is particularly noted that the sequence in this embodiment does not limit the signal transmission sequence and implementation sequence in this application.

[0441] For the first node U1, a first information block is received in step S510; a second information block is received in step S5110; a target information block is received in step S5120; a first signaling is received in step S5130; a target RO group is determined in step S511, and a random access preamble is sent in the target RO group.

[0442] For the second node N2, a first information block is sent in step S520, and a second information block is sent in step S5210; a target information block is sent in step S5220; a first signaling is sent in step S5230; and a random access preamble is received in the target RO group in step S521.

[0443] In Example 5, the first symbol set includes at least one symbol configured as a downlink symbol by TDD uplink and downlink configuration signaling and used for uplink transmission; the target RO group includes at least one RO, and the ROs in the target RO group are all associated with the first SSB index; whether the target RO group includes the RO in the first symbol set depends on the number of ROs included in the target RO group.

[0444] As an embodiment, the first node U1 is the first node in this application.

[0445] As an embodiment, the second node N2 is the second node in this application.

[0446] As an embodiment, the air interface between the second node N2 and the first node U1 includes a wireless interface between a base station device and a user equipment.

[0447] As an embodiment, the air interface between the second node N2 and the first node U1 includes a wireless interface between a relay node device and a user equipment.

[0448] As an embodiment, the air interface between the second node N2 and the first node U1 includes a wireless interface between user equipments.

[0449] As an example, Figure 5 The steps in box F51 exist; the method applied to the first node in the present application includes: receiving a second information block.

[0450] As an embodiment, the number of ROs included in the target RO group is greater than the first integer in the present application, and the target RO group is an RO group in a first RO group set; the first RO group set includes multiple RO groups, each RO group in the multiple RO groups includes N ROs, and N is a configurable positive integer greater than 1; the first RO group set includes at least part of the ROs associated with the first SSB index in an SSB-RO mapping loop; the first RO group set depends on the second information block.

[0451] As an embodiment, the second information block is carried by higher layer signaling.

[0452] As an embodiment, the second information block is carried by RRC signaling.

[0453] As an embodiment, the second information block includes information in at least one RRC IE.

[0454] As an embodiment, the second information block includes part or all of the fields included in an RRC IE.

[0455] As an embodiment, the second information block includes part or all of the fields included in each RRC IE in multiple RRC IEs.

[0456] As an embodiment, the first information block includes part or all of the fields included in a SIB1.

[0457] As an embodiment, the second information block includes part or all of the fields in the RACH-ConfigCommon IE.

[0458] As an embodiment, the second information block includes part or all of the fields in the RACH-ConfigDedicatedIE.

[0459] As an embodiment, the second information block includes part or all of the fields in the RACH-ConfigGeneric IE.

[0460] As an embodiment, the second information block includes part or all of the fields in the RACH-ConfigCommonTwoStepRA IE.

[0461] As an embodiment, the second information block includes part or all of the fields in the RACH-ConfigGenericTwoStepRA IE.

[0462] As an embodiment, the second information block indicates the time domain information of the RO configured for the first node U1.

[0463] As an embodiment, the second information block indicates a PRACH configuration index, and the PRACH configuration index indicates time domain information of the RO configured for the first node.

[0464] As a sub-embodiment of this embodiment, the PRACH configuration index indicates a row of the random access configuration table, the row of the random access configuration table indicates the PRACH configuration period, the offset of the PRACH configuration period, the subframe number where the RO is located, the number of PRACH time slots included in a subframe, the time division multiplexing number of the RO in a PRACH time slot and the number of symbols occupied by a RO; the PRACH configuration period, the offset of the PRACH configuration period, the subframe number where the RO is located, the number of PRACH time slots included in the subframe and the time division multiplexing number of the RO in the PRACH time slot jointly indicate the time domain information of the RO configured by the first node U1.

[0465] As an embodiment, the second information block indicates frequency domain information of the RO configured for the first node U1.

[0466] As a sub-embodiment of this embodiment, the second information indicates the RO frequency domain starting position, the number of RBs occupied in the frequency domain and the frequency division multiplexing number; the RO frequency domain starting position, the number of RBs occupied in the frequency domain and the frequency division multiplexing number jointly indicate the frequency domain information of the RO configured by the first node U1.

[0467] As an embodiment, the second information block indicates the number of SSBs to which one RO can be mapped.

[0468] As an embodiment, the time domain information of the RO configured on the first node U1, the frequency domain information of the RO configured on the first node and the number of SSBs to which the one RO can be mapped jointly indicate the ROs in the first RO set.

[0469] As an embodiment, the second information block indicates the code domain information of the RO configured for the first node U1.

[0470] As a sub-embodiment of this embodiment, the code domain resources include a preamble.

[0471] As a sub-embodiment of this embodiment, the code domain resources include orthogonal sequences.

[0472] As an embodiment, the second information block indicates the number of RO groups included in the first RO group set.

[0473] As an embodiment, the second information block explicitly indicates the first RO group set.

[0474] As an embodiment, the second information block implicitly indicates the first RO group set.

[0475] As an embodiment, the second information block configures the first RO group set.

[0476] As an embodiment, the second information block indicates time domain resources occupied by any RO in the first RO group set.

[0477] As an embodiment, the second information block indicates frequency domain resources occupied by any RO in the first RO group set.

[0478] As an embodiment, the second information block indicates code domain resources occupied by any RO in the first RO group set.

[0479] As an embodiment, the second information block indicates time domain resources occupied by any RO group in the first RO group set.

[0480] As an embodiment, the second information block indicates frequency domain resources occupied by any RO group in the first RO group set.

[0481] As an embodiment, the second information block indicates code domain resources occupied by any RO group in the first RO group set.

[0482] As an embodiment, the RO associated with the first SSB index in the SSB-RO mapping cycle is for legacy UEs.

[0483] As an embodiment, the RO associated with the first SSB index in the SSB-RO mapping cycle is for Rel-17 UE.

[0484] As an embodiment, the RO associated with the first SSB index in the SSB-RO mapping cycle is for UE versions before Rel-17.

[0485] As an embodiment, the SSB-RO mapping cycle means that all SSBs transmitted within one SSB cycle are mapped to RO once.

[0486] As an embodiment, the SSB-RO mapping cycle means that all SSBs transmitted in an SSB burst are mapped to RO once.

[0487] As an embodiment, the one SSB-RO mapping cycle is used to determine the mapping relationship between all SSB indexes and ROs in a time window.

[0488] As an embodiment, the one SSB-RO mapping cycle is used to determine at least one of the time domain position or the frequency domain position of the RO mapped to all SSB indexes in a time window.

[0489] As an embodiment, the order in which an SSB index is mapped to an RO in the SSB-RO mapping cycle is:

[0490] - First, in increasing order of preamble indexes within a single RO;

[0491] - Second, sort the frequency-division multiplexed ROs in ascending order according to the frequency domain resource index;

[0492] - Third, the ROs time-division multiplexed in each PRACH time slot are sorted in ascending order according to the time domain resource index;

[0493] - Fourth, in ascending order of PRACH time slot index.

[0494] As an embodiment, the method of mapping an SSB index to RO in an SSB-RO mapping cycle is the first mapping method in this application.

[0495] As an embodiment, the order in which an SSB index is mapped to an RO in the SSB-RO mapping cycle is:

[0496] - First, sort the frequency-division multiplexed ROs in ascending order according to the frequency domain resource index;

[0497] - Second, the ROs time-division multiplexed in each PRACH time slot are sorted in ascending order according to the time domain resource index;

[0498] -Third, in ascending order of PRACH time slot index.

[0499] As an embodiment, an association period includes at least the one SSB-RO mapping cycle.

[0500] As an embodiment, the one SSB-RO mapping cycle corresponds to the one association period.

[0501] As an embodiment, the one SSB-RO mapping cycle corresponds to a cycle formed by all ROs associated with an SSB index in the one association period.

[0502] As an embodiment, the one SSB-RO mapping cycle includes a plurality of RO group sets consisting of all ROs associated with one SSB index in one association period.

[0503] As an embodiment, one association cycle includes multiple RO group sets associated with one SSB index, and any RO group set in the multiple RO group sets corresponds to one SSB-RO mapping cycle.

[0504] As a sub-embodiment of this embodiment, any RO group set among the multiple RO group sets indexes the ROs in an ascending manner.

[0505] As a sub-embodiment of this embodiment, the indexing method of ROs in any two RO group sets among the multiple RO group sets is repeated.

[0506] As a sub-embodiment of this embodiment, the number of ROs included in any RO group set among the multiple RO group sets is indicated by high-layer signaling or by DCI.

[0507] As an embodiment, one association period corresponds to Q1 SSB indexes mapped to at least one minimum period corresponding to RO, and Q1 is a positive integer greater than 1.

[0508] As a sub-embodiment of this embodiment, Q1 is

[0509] As a sub-embodiment of this embodiment, Q1 is the total number of SSB indexes configured by the sender of the first information block.

[0510] As a sub-embodiment of this embodiment, Q1 is the total number of SSB indexes configured by the first node.

[0511] As a sub-embodiment of this embodiment, Q1 is the total number of SSBs transmitted in one SSB cycle described in this application.

[0512] As a sub-embodiment of this embodiment, the Q1 is the total number of SSBs transmitted in an SSB burst set described in this application.

[0513] As an embodiment, the association period is an integer multiple of a PRACH configuration period including at least one SSB-RO mapping cycle.

[0514] As a sub-embodiment of this embodiment, the PRACH configuration period is configured by the sender of the first information block.

[0515] As a sub-embodiment of this embodiment, the PRACH configuration period is indicated by the sender of the first information block.

[0516] As a sub-embodiment of this embodiment, the association period is no greater than 160ms.

[0517] As a sub-embodiment of this embodiment, the one association period is predefined.

[0518] As a sub-embodiment of this embodiment, the mapping between the association period and the PRACH configuration period refers to Table 8.1-1 in 3GPP TS38.213.

[0519] As an embodiment, there is one RO in the association cycle that is not mapped to the SSB.

[0520] As an embodiment, all ROs in the one association cycle are mapped to SSB.

[0521] As an example, Figure 5 The step in box F51 does not exist.

[0522] As an example, Figure 5 The steps in box F52 exist; the method applied to the first node in the present application includes: receiving a target information block.

[0523] As an embodiment, the target information block indicates that the first symbol set is used for random access, and the target RO group can include ROs in the first symbol set.

[0524] As an embodiment, the target information block is carried by higher layer signaling.

[0525] As an embodiment, the target information block is carried by RRC signaling.

[0526] As an embodiment, the target information block includes information in at least one RRC IE.

[0527] As an embodiment, the target information block includes part or all of the fields included in an RRC IE.

[0528] As an embodiment, the target information block includes part or all of the fields included in each RRC IE in multiple RRC IEs.

[0529] As an embodiment, the target information block includes part or all of the fields included in a SIB1.

[0530] As an embodiment, the name of the RRC signaling carrying the target information block includes "SIB".

[0531] As an embodiment, the name of the RRC signaling carrying the target information block includes "SBFD".

[0532] As an embodiment, the name of the RRC signaling carrying the target information block includes "Config".

[0533] As an embodiment, the name of the RRC signaling carrying the target information block includes "RACH".

[0534] As an embodiment, the name of the RRC signaling carrying the target information block includes "RA".

[0535] As an embodiment, the name of the RRC signaling carrying the target information block includes "Generic".

[0536] As an embodiment, the name of the RRC signaling carrying the target information block includes "Common".

[0537] As an embodiment, the name of the RRC signaling carrying the target information block includes "Dedicated".

[0538] As an embodiment, the name of the RRC signaling carrying the target information block includes "TwoStep".

[0539] As an embodiment, the name of the RRC signaling carrying the target information block includes "duplex".

[0540] As an embodiment, the receivers of the target information block do not include legacy UEs.

[0541] As an embodiment, the target information block is unavailable to legacy UE.

[0542] As an embodiment, the target information block implicitly indicates that the first set of symbols is used for random access.

[0543] As an embodiment, the target information block explicitly indicates that the first set of symbols is used for random access.

[0544] As an embodiment, the target information block is configured in the RO in the first symbol set.

[0545] As an embodiment, the target information block is only configured in the RO in the first symbol set.

[0546] As an embodiment, the target information block indicates that the RO in the first symbol set can be used to send a random access preamble.

[0547] As an embodiment, the target information block indicates that the RO in the first symbol set can be used to send a random access preamble when a given condition is met.

[0548] As a sub-embodiment of this embodiment, the given conditions include: maximum transmission power.

[0549] As a sub-embodiment of this embodiment, the given conditions include: priority rules.

[0550] As a sub-embodiment of this embodiment, the given conditions include: UE processing time requirements.

[0551] As a sub-embodiment of this embodiment, the advantage of the above method is that the first node U1 can determine whether the RO in the first symbol set can be used to send a random access preamble according to actual conditions, can be flexibly applied to different environments, and better handle cross-link interference.

[0552] As an embodiment, the feature "the first symbol set is used for random access" means that RO is configured on the symbols included in the first symbol set.

[0553] As an embodiment, the feature "the first symbol set is used for random access" means that the RO configured on the symbols included in the first symbol set is a valid RO.

[0554] As an embodiment, the feature "the first symbol set is used for random access" means that when the time domain resources occupied by the RO configured by the first node overlap with the first symbol set, the RO configured by the first node is a valid RO.

[0555] As an embodiment, the feature "the first symbol set is used for random access" means that the RO on the first symbol set can be mapped to an SSB index in an SSB-RO mapping loop.

[0556] As an embodiment, the feature "the first symbol set is used for random access" means that the RO on the first symbol set can be mapped to an SSB index in a non-legacy SSB-RO mapping loop.

[0557] As an embodiment, the target information block is used to determine the RO associated with the first SSB index in a non-legacy SSB-RO mapping cycle.

[0558] As an embodiment, the target information block is used to indicate the RO group associated with the first SSB index in a non-legacy SSB-RO mapping cycle.

[0559] As an embodiment, the target information block is used to indicate the RO associated with the first SSB index in the SSB-RO mapping loop in the first symbol set.

[0560] As an embodiment, the target information block is used to indicate the RO associated with all SSB indexes in a non-legacy SSB-RO mapping cycle.

[0561] As a sub-embodiment of this embodiment, when the first symbol set is used for random access, the ROs in the first symbol set included in the first RO group belong to the ROs associated with the first SSB index in a non-legacy SSB-RO mapping cycle.

[0562] As an embodiment, the method of mapping an SSB index to RO in the non-legacy SSB-RO mapping cycle is the second mapping method in this application.

[0563] As an embodiment, the non-legacy SSB-RO mapping cycle is an SSB-RO mapping cycle for Rel-18.

[0564] As an embodiment, the non-legacy SSB-RO mapping cycle is an SSB-RO mapping cycle for Rel-18 and later versions.

[0565] As an embodiment, the non-legacy SSB-RO mapping cycle is an SSB-RO mapping cycle for Rel-19 and later versions.

[0566] As an embodiment, the non-legacy SSB-RO mapping cycle is invisible to Rel-11 and earlier versions.

[0567] As an embodiment, the non-legacy SSB-RO mapping cycle is not available for Rel-11 and earlier versions.

[0568] As an example, Figure 5 The step in box F52 does not exist.

[0569] As a sub-embodiment of this embodiment, the first symbol set is not used for random access.

[0570] As a sub-embodiment of this embodiment, whether the first symbol set is used for random access is a default.

[0571] As a sub-embodiment of this embodiment, whether the first symbol set is used for random access is predefined.

[0572] As a sub-embodiment of this embodiment, whether the first set of symbols is used for random access is implementation-dependent.

[0573] As an embodiment, the feature "the first symbol set is not used for random access" means that RO is not configured on the symbols included in the first symbol set.

[0574] As an embodiment, the feature "the first symbol set is not used for random access" means that the RO configured on the symbols included in the first symbol set is not a valid RO.

[0575] As an embodiment, the feature "the first symbol set is not used for random access" means that when the time domain resources occupied by the RO configured for the first node overlap with the first symbol set, the RO configured for the first node is not a valid RO.

[0576] As an embodiment, the feature "the first symbol set is not used for random access" means that the RO on the first symbol set cannot be mapped to an SSB index in an SSB-RO mapping loop.

[0577] As an example, Figure 5 The steps in box F53 exist; the method applied to the first node in the present application includes: receiving a first signaling.

[0578] As an embodiment, the first signaling indicates a first PRACH mask index value, and among the ROs associated with the first SSB index in the one SSB-RO mapping cycle, only the ROs indicated by the first PRACH mask index value belong to the first RO group set in the present application.

[0579] As an embodiment, the PRACH mask index value refers to: PRACH mask index value.

[0580] As an embodiment, the first signaling is higher layer signaling.

[0581] As an embodiment, the first signaling is RRC layer signaling.

[0582] As an embodiment, the first signaling includes at least one RRC IE.

[0583] As an embodiment, the first signaling includes part or all of the fields included in an RRC IE.

[0584] As an embodiment, the first signaling includes part or all of the fields included in each RRC IE in multiple RRC IEs.

[0585] As an embodiment, the first signaling includes part or all of the fields included in a ReconfigurationWithSync IE.

[0586] As an embodiment, the first signaling includes part or all of the fields in the RACH-ConfigDedicated IE.

[0587] As an embodiment, the first signaling includes part or all of the fields in the CFRA IE.

[0588] As an embodiment, the first signaling includes part or all of the fields in the CFRA-TwoStep IE.

[0589] As an embodiment, the first signaling includes part or all of the fields in the SI-RequestConfig IE.

[0590] As an embodiment, the first signaling includes part or all of the fields in the SI-RequestResources IE.

[0591] As an embodiment, the first signaling includes a ra-ssb-OccasionMaskIndex field.

[0592] As an embodiment, the first signaling is layer 1 signaling.

[0593] As an embodiment, the first signaling is physical layer signaling.

[0594] As an embodiment, the first signaling is a PDCCH (Physical Downlink Control CHannel) order.

[0595] As an embodiment, the first signaling is an enhanced PDCCH order.

[0596] As an embodiment, the first signaling includes a DCI or one or more fields.

[0597] As an embodiment, the first signaling is DCI, and the format of the DCI is DCI format 0_1.

[0598] As an embodiment, the first signaling is DCI, the DCI includes a Random Access Preamble index field, and the Random Access Preamble index field included in the DCI is not zero.

[0599] As an embodiment, the first signaling is DCI, the DCI includes a Frequency domain resourceassignment field, and the Frequency domain resource assignment field included in the DCI is set to all 1s.

[0600] As an embodiment, the first signaling triggers the first node U1 to send the random access preamble in the target RO group.

[0601] As an embodiment, the first signaling indicates the first PRACH mask index value.

[0602] As an embodiment, the first signaling is RRC signaling, the RRC signaling includes a ra-ssb-OccasionMaskIndex field, and the ra-ssb-OccasionMaskIndex field included in the RRC signaling indicates the first PRACH mask index value.

[0603] As an embodiment, the first signaling is DCI, the DCI includes a PRACH mask index field (Field), and the PRACH mask index field included in the DCI indicates the first PRACH mask index value.

[0604] As an embodiment, the first signaling indicates the first SSB index.

[0605] As an embodiment, the first signaling is RRC signaling, the RRC signaling includes the ssb field in the CFRA-SSB-ResourceIE, and the ssb field in the CFRA-SSB-Resource IE included in the RRC signaling indicates the first SSB index.

[0606] As an embodiment, the first signaling is DCI, the DCI includes an SS / PBCH index field, and the SS / PBCH index field included in the DCI indicates the first SSB index.

[0607] As an embodiment, the first signaling indicates the index value of the random access preamble in the target RO.

[0608] As an embodiment, the first signaling is RRC signaling, the RRC signaling includes a ra-PreambleIndex field in a CFRA-SSB-ResourceIE, and the ra-PreambleIndex field in the CFRA-SSB-Resource IE included in the RRC signaling indicates an index value of the random access preamble sent in the target RO.

[0609] As an embodiment, the first signaling is DCI, the DCI includes a Random Access Preamble index field, and the Random Access Preamble index field included in the DCI indicates an index value of the random access preamble sent in the target RO.

[0610] As an embodiment, the first signaling is DCI, and the SSB-RO mapping cycle in the present application refers to the first available SSB-RO mapping cycle after the first node U1 decodes the first signaling.

[0611] As a sub-embodiment of this embodiment, the SSB-RO mapping cycle includes the legacy SSB-RO mapping cycle described in this application.

[0612] As a sub-embodiment of this embodiment, the SSB-RO mapping cycle includes the non-legacy SSB-RO mapping cycle described in this application.

[0613] As an example, Figure 5 The step in box F53 does not exist.

[0614] As a sub-embodiment of this embodiment, the sending of the random access preamble by the first node U1 in the target RO group is triggered by the RRC layer or the MAC entity.

[0615] As a sub-embodiment of this embodiment, the sending of the random access preamble by the first node U1 in the target RO group is not triggered by a PDCCH order.

[0616] As a sub-embodiment of this embodiment, the random access preamble sent by the first node U1 in the target RO group is a random access preamble for CBRA.

[0617] As an example, Figure 5 In the above, box F51, box F51 and box F53 do not exist, the step S510 is before the step S511, and the step S520 is before the step S521.

[0618] As an example, Figure 5 The steps in box F51 in exist, the step S5210 is before the step S521, and the step S5110 is before the step S511.

[0619] As a sub-embodiment of this embodiment, step S5210 is before step S520, and step S5110 is before step S510.

[0620] As a sub-embodiment of this embodiment, step S5210 is after step S520, and step S5110 is after step S510.

[0621] As a sub-embodiment of this embodiment, the first information block and the second information block both include RRC signaling, the first information block and the second information block include different fields of the same RRC IE, the step S5210 and the step S520 occur simultaneously, and the step S5110 and the step S510 occur simultaneously.

[0622] As an example, Figure 5 The steps in box F52 exist, step S5220 is before step S521, and step S5120 is before step S511.

[0623] As a sub-embodiment of this embodiment, step S5220 is before step S520, and step S5120 is before step S510.

[0624] As a sub-embodiment of this embodiment, step S5220 is after step S520, and step S5120 is after step S510.

[0625] As a sub-embodiment of this embodiment, the first information block and the target information block both include RRC signaling, the first information block and the target information block include different fields of the same RRC IE, the step S5220 and the step S520 occur simultaneously, and the step S5120 and the step S510 occur simultaneously.

[0626] As an example, Figure 5 The steps in box F53 exist, the step S5230 is before the step S521, and the step S5130 is before the step S511.

[0627] As a sub-embodiment of this embodiment, step S5230 is before step S520, and step S5130 is before step S510.

[0628] As a sub-embodiment of this embodiment, step S5230 is after step S520, and step S5130 is after step S510.

[0629] As a sub-embodiment of this embodiment, the first information block and the first signaling both include RRC signaling, the first information block and the first signaling include different fields of the same RRC IE, the step S5230 and the step S520 occur simultaneously, and the step S5130 and the step S510 occur simultaneously.

[0630] As an example, Figure 5The steps in box F51 and box F52 exist at the same time, and the step S5210 and the step S5220 are both before the step S521; the step S5110 and the step S5120 are both before the step S511.

[0631] As an example, Figure 5 The steps in box F51 and box F53 exist at the same time, and the step S5210 and the step S5230 are both before the step S521; the step S5110 and the step S5130 are both before the step S511.

[0632] As an example, Figure 5 The steps in box F52 and box F53 exist at the same time, and the step S5220 and the step S5230 are both before the step S521; the step S5120 and the step S5130 are both before the step S511.

[0633] As an example, Figure 5 The steps in box F52, box F52 and box F53 exist at the same time, the step S5210, the step S5220 and the step S5230 are all before the step S521; the step S5110, the step S5120 and the step S5130 are all before the step S511.

[0634] As an embodiment, the first information block is transmitted on a downlink physical control channel (ie, a downlink channel that can only be used to carry physical layer control signaling).

[0635] As an embodiment, the physical layer channel occupied by the first information block includes PDCCH.

[0636] As an embodiment, the first information block is transmitted on a downlink physical data channel (ie, a downlink channel that can be used to carry physical layer data).

[0637] As an embodiment, the physical layer channel occupied by the first information block includes PDSCH.

[0638] As an embodiment, the transmission channel occupied by the first information block includes DL-SCH (DownLink-Shared CHannel).

[0639] As an embodiment, the second information block is transmitted on a downlink physical data channel (ie, a downlink channel that can be used to carry physical layer data).

[0640] As an embodiment, the physical layer channel occupied by the second information block includes PDSCH.

[0641] As an embodiment, the transmission channel occupied by the second information block includes DL-SCH.

[0642] As an embodiment, the target information block is transmitted on a downlink physical data channel (ie, a downlink channel that can be used to carry physical layer data).

[0643] As an embodiment, the physical layer channel occupied by the target information block includes PDSCH.

[0644] As an embodiment, the transmission channel occupied by the target information block includes DL-SCH.

[0645] As an embodiment, the first signaling is transmitted on a downlink physical control channel (ie, a downlink channel that can only be used to carry physical layer control signaling).

[0646] As an embodiment, the physical layer channel occupied by the first signaling includes PDCCH.

[0647] As an embodiment, the first signaling is transmitted on a downlink physical data channel (ie, a downlink channel that can be used to carry physical layer data).

[0648] As an embodiment, the physical layer channel occupied by the first signaling includes PDSCH.

[0649] As an embodiment, the physical layer channel occupied by the random access preamble sent in the target RO group includes PRACH.

[0650] Example 6

[0651] Embodiment 6 illustrates two cases of whether the target RO group includes the RO in the first symbol set according to an embodiment of the present application, as shown in the attached figure. Figure 6 As shown in the attached Figure 6 In the embodiment, case (a) indicates that when the number of ROs included in the target RO group is not greater than the first integer, the first node determines whether the target RO group includes the ROs in the first symbol set; case (b) indicates that when the number of ROs included in the target RO group is greater than the first integer, the target RO group does not include the ROs in the first symbol set.

[0652] In Embodiment 6, the first integer is a positive integer.

[0653] As an embodiment, when the number of ROs included in the target RO group is not greater than a first integer, the first node determines whether the target RO group includes the ROs in the first symbol set; when the number of ROs included in the target RO group is greater than a first integer, the target RO group does not include the ROs in the first symbol set; the first integer is a positive integer.

[0654] As an embodiment, the first integer is equal to 1.

[0655] As an embodiment, the first integer is equal to 2 or 4.

[0656] As an embodiment, the first integer is fixed.

[0657] As an embodiment, the first integer is predefined.

[0658] As an embodiment, the first integer is configured through high-level signaling.

[0659] As an embodiment, when the number of ROs included in the target RO group is not greater than the first integer, the target RO group includes the ROs in the first symbol set.

[0660] As an embodiment, when the number of ROs included in the target RO group is not greater than the first integer, the target RO group includes ROs in the first symbol set that are outside the first symbol set.

[0661] As an embodiment, when the number of ROs included in the target RO group is not greater than the first integer, the target RO group can include ROs in the first symbol set.

[0662] As an embodiment, when the number of ROs included in the target RO group is not greater than the first integer, the first node in the present application determines by itself whether the target RO group includes the ROs in the first symbol set.

[0663] As an embodiment, when the number of ROs included in the target RO group is not greater than the first integer, whether the target RO group includes the ROs in the first symbol set is implementation-dependent.

[0664] As an embodiment, when the number of ROs included in the target RO group is not greater than the first integer, the first node determines that the target RO group includes ROs in the first symbol set.

[0665] As an embodiment, when the number of ROs included in the target RO group is not greater than the first integer, the first node determines that the target RO group does not include ROs in the first symbol set.

[0666] As an embodiment, when the number of ROs included in the target RO group is not greater than the first integer, the target RO group can include ROs in the first symbol set, and in the present application, the first node determines whether the target RO group includes ROs in the first symbol set.

[0667] As an embodiment, when the number of ROs included in the target RO group is greater than a second integer and not greater than the first integer, the first node determines whether the target RO group includes the ROs in the first symbol set; otherwise, the target RO group does not include the ROs in the first symbol set; the second integer is a positive integer.

[0668] As a sub-embodiment of this embodiment, when the number of ROs included in the target RO group is greater than the second integer and not greater than the first integer, the first node in the present application determines by itself whether the target RO group includes the ROs in the first symbol set.

[0669] As a sub-embodiment of this embodiment, when the number of ROs included in the target RO group is greater than a second integer and not greater than the first integer, the first node in the present application determines that the target RO group includes ROs in the first symbol set.

[0670] As a sub-embodiment of this embodiment, when the number of ROs included in the target RO group is greater than a second integer and not greater than the first integer, the first node in the present application determines that the target RO group does not include ROs in the first symbol set.

[0671] As a sub-embodiment of this embodiment, the second integer is equal to 1.

[0672] As an embodiment, when the number of ROs included in the target RO group is greater than the first integer, the target RO group cannot include ROs in the first symbol set.

[0673] As an embodiment, when the number of ROs included in the target RO group is greater than the first integer, the target RO group only includes ROs outside the first symbol set.

[0674] Example 7

[0675] Embodiment 7 illustrates a schematic diagram in which the number of ROs included in the target RO group according to an embodiment of the present application is greater than a first integer, as shown in the attached figure. Figure 7 As shown in the attached Figure 7 In the figure, a diamond-shaped cross-filled rectangle represents an RO group; a cross-filled rectangle represents an RO in a first symbol set, a diagonally filled rectangle represents an RO associated with a first SSB index in an SSB-RO mapping cycle, and a gray-bottom filled rectangle represents an RO in a target RO group; wherein a gray-bottom diagonally filled rectangle represents an RO associated with the first SSB index in the SSB-RO mapping cycle included in the target RO group; it is worth noting that the number of ROs included in the target RO group is only an illustrative example and does not represent the actual number of ROs included in the target RO group.

[0676] In Example 7, the number of ROs included in the target RO group is greater than the first integer, and the target RO group is an RO group in a first RO group set; the first RO group set includes multiple RO groups, each RO group in the multiple RO groups includes N ROs, and N is a configurable positive integer greater than 1; the first RO group set includes at least part of the ROs associated with the first SSB index in an SSB-RO mapping cycle.

[0677] As an embodiment, the number of ROs included in the target RO group is greater than the first integer, and the target RO group is an RO group in a first RO group set; the first RO group set includes multiple RO groups, each RO group in the multiple RO groups includes N ROs, and N is a configurable positive integer greater than 1; the first RO group set includes at least part of the ROs associated with the first SSB index in an SSB-RO mapping loop.

[0678] As an embodiment, when the number of ROs included in the target RO group is greater than the first integer, the first node selects the target RO group from the first RO group set by itself.

[0679] As an embodiment, when the number of ROs included in the target RO group is greater than the first integer, the first node implements the relevant selection of the target RO group from the first RO group set.

[0680] As an embodiment, when the number of ROs included in the target RO group is greater than the first integer, the first node selects the target RO group from the first RO group set with equal probability.

[0681] As an embodiment, when the number of ROs included in the target RO group is greater than the first integer, the first node randomly selects the target RO group from the first RO group set.

[0682] As an embodiment, the first RO group set includes multiple RO groups, each of the multiple RO groups includes N ROs, and N is a configurable positive integer greater than 1.

[0683] As an embodiment, the first RO group set is configured through high-layer signaling.

[0684] As an embodiment, the first RO group set includes at least one RO in the first symbol set.

[0685] As an embodiment, the first RO group set only includes ROs outside the first symbol set.

[0686] As an embodiment, the first RO group set only includes ROs associated with the first SSB index in one SSB-RO mapping cycle.

[0687] As an embodiment, the first RO group set includes at least one RO in the first symbol set and at least one RO outside the first symbol set.

[0688] As an embodiment, there is at least one RO group in the first RO group set that only includes ROs outside the first symbol set.

[0689] As an embodiment, there is at least one RO group in the first RO group set including ROs in the first symbol set and ROs outside the first symbol set.

[0690] As an embodiment, the target RO group includes at least one RO in the first symbol set.

[0691] As an embodiment, the target RO group only includes ROs outside the first symbol set.

[0692] As an embodiment, the target RO group includes ROs in the first symbol set and ROs outside the first symbol set.

[0693] As an embodiment, the first RO group set includes a portion of ROs associated with the first SSB index in an SSB-RO mapping cycle.

[0694] As an embodiment, the target RO group includes at least part of the ROs associated with the first SSB index in an SSB-RO mapping cycle.

[0695] As an embodiment, the first RO group set includes all ROs associated with the first SSB index in one SSB-RO mapping cycle.

[0696] As an embodiment, the target RO group includes all ROs associated with the first SSB index in an SSB-RO mapping cycle.

[0697] Example 8

[0698] Embodiment 8 illustrates a schematic diagram of the relationship between the first PRACH mask index value and the first RO group set according to an embodiment of the present application, as shown in the attached figure. Figure 8 As shown in the attached Figure 8 In the embodiment, the first signaling indicates a first PRACH mask index value; among the ROs associated with the first SSB index in an SSB-RO mapping cycle, only the ROs indicated by the first PRACH mask index value belong to the first RO group set, and the ROs associated with the first SSB index in the SSB-RO mapping cycle are represented as RO#1, ..., RO#m, ..., RO#M, where M is a positive integer greater than 1.

[0699] As an embodiment, the first signaling indicates a first PRACH mask index value, and among the ROs associated with the first SSB index in the one SSB-RO mapping cycle, only the ROs indicated by the first PRACH mask index value belong to the first RO group set.

[0700] As an embodiment, the first PRACH mask index value indicates at least one RO group.

[0701] As an embodiment, the first PRACH mask index value indicates at least one RO group.

[0702] As an embodiment, the first PRACH mask index value indicates all ROs in the RO associated with the first SSB index in the one SSB-RO mapping cycle.

[0703] As an embodiment, the first PRACH mask index value indicates a portion of the ROs in the RO associated with the first SSB index in the one SSB-RO mapping cycle.

[0704] As an embodiment, the first SSB index is associated with L1 RO group sets, the ROs in any RO group set in the L1 RO group sets are sorted, and the first RO group set includes the ROs indicated by the first PRACH mask index value in any RO group set in the L1 RO group sets.

[0705] As a sub-embodiment of this embodiment, L1 is equal to 1.

[0706] As a sub-embodiment of this embodiment, L1 is greater than 1.

[0707] As a sub-embodiment of this embodiment, there are two RO group sets in the L1 RO group sets, and the ROs included in them are overlapping.

[0708] As a sub-embodiment of this embodiment, there are two RO group sets in the L1 RO group sets, and the ROs included therein are orthogonal.

[0709] As a sub-embodiment of this embodiment, there are two RO group sets in the L1 RO group sets including the same number of ROs.

[0710] As a sub-embodiment of this embodiment, there are two RO group sets in the L1 RO group sets, and the numbers of ROs included are different.

[0711] As a sub-embodiment of this embodiment, the number of RO groups included in any RO group set of the L1 RO group sets is no more than 8.

[0712] As a sub-embodiment of this embodiment, the first mask index value indicates one RO group set among L1 RO group sets.

[0713] As a sub-embodiment of this embodiment, all ROs included in the L1 RO group sets belong to the RO associated with the first SSB index in the one SSB-RO mapping cycle.

[0714] As a sub-embodiment of this embodiment, all ROs included in the L1 RO group sets belong to ROs associated with the first SSB index in an association cycle.

[0715] As a sub-embodiment of this embodiment, all ROs included in the L1 RO group sets belong to ROs associated with the first SSB index in an associated pattern period.

[0716] As an embodiment, in the SSB-RO mapping loop, there are M ROs associated with the first SSB index, where M is a positive integer greater than 1, and the M ROs are indexed in a given order. The RO whose remainder obtained by taking the index modulo a given integer among the M ROs and corresponds to the first PRACH mask index value belongs to the first RO group set.

[0717] As a sub-embodiment of this embodiment, the given integer is fixed, or the given integer is configured through high-layer signaling.

[0718] As a sub-embodiment of this embodiment, the given integer depends on the association period in the present application.

[0719] As a sub-embodiment of this embodiment, the given sequential index is indexed in ascending order of frequency domain resources first and then in ascending order of time domain resources.

[0720] As a sub-embodiment of this embodiment, the given sequential index is indexed in ascending order of time domain resources first and then in ascending order of frequency domain resources.

[0721] Example 9

[0722] Embodiment 9 illustrates a schematic diagram in which the number of ROs included in the target RO group according to an embodiment of the present application is not greater than a first integer, as shown in the attached figure. Fig. 9 As shown in the attached Fig. 9 In the figure, a rectangle filled with diamond crosses represents an RO group; a rectangle filled with crosses represents an RO in a first symbol set, a rectangle filled with upper diagonal lines represents an RO associated with a first SSB index in an SSB-RO mapping cycle, and a rectangle filled with gray background represents an RO in a target RO group; wherein, a rectangle filled with upper diagonal lines with gray background represents an RO associated with the first SSB index in the SSB-RO mapping cycle included in the target RO group; a rectangle filled with crosses with gray background represents an RO in the first symbol set included in the target RO group; it is worth noting that the number of ROs included in the target RO group is only an illustrative example and does not represent the actual number of ROs included in the target RO group.

[0723] In Example 9, the number of ROs included in the target RO group is not greater than the first integer, and the target RO group is an RO group in a second RO group set; the second RO group set includes at least one RO in an RO associated with the first SSB index in an SSB-RO mapping cycle, and the second RO group set includes at least one RO in the first symbol set; the ROs in the RO groups included in the second RO group set are all associated with the first SSB index.

[0724] As an embodiment, when the number of ROs included in the target RO group is not greater than the first integer, the first node selects the target RO group from the second RO group set by itself.

[0725] As an embodiment, when the number of ROs included in the target RO group is not greater than the first integer, the first node implements the relevant selection of the target RO group from the second RO group set.

[0726] As an embodiment, when the number of ROs included in the target RO group is not greater than the first integer, the first node selects the target RO group from the second RO group set with equal probability.

[0727] As an embodiment, when the number of ROs included in the target RO group is not greater than the first integer, the first node randomly selects the target RO group from the second RO group set.

[0728] As an embodiment, the second RO group set includes multiple RO groups, each of the multiple RO groups includes N ROs, and N is a configurable positive integer greater than 1.

[0729] As an embodiment, the second RO group set is configured through high-layer signaling.

[0730] As an embodiment, the second RO group set includes at least one RO in the first symbol set.

[0731] As an embodiment, the second RO group set includes at least one RO in the first symbol set and at least one RO outside the first symbol set.

[0732] As an embodiment, there is at least one RO group in the second RO group set including ROs in the first symbol set and ROs outside the first symbol set.

[0733] As an embodiment, the second RO group set includes at least one RO group and includes one RO in the RO associated with the first SSB index in at least one SSB-RO mapping cycle, and includes at least one RO in the first symbol set.

[0734] As an embodiment, the target RO group includes at least one RO in the first symbol set.

[0735] As an embodiment, the target RO group includes ROs in the first symbol set and ROs outside the first symbol set.

[0736] As an embodiment, the ROs included in the second RO group set overlap with the ROs included in the first RO group set in this application.

[0737] As an embodiment, at least one RO among the ROs included in the second RO group set belongs to the RO included in the first RO group set.

[0738] As an embodiment, at least one RO among the ROs included in the first RO group set belongs to the RO included in the second RO group set.

[0739] As an embodiment, any RO in the first RO group set in the present application is one of the ROs included in the second RO group set.

[0740] As an embodiment, at least one RO in the second RO group set is an RO other than all ROs included in the first RO group set in the present application.

[0741] Example 10

[0742] Embodiment 10 illustrates a schematic diagram of two mapping methods according to an embodiment of the present application, as shown in the attached figure. Fig.10 As shown in the attached Fig.10 In the above, case (a) indicates that when the number of ROs included in the target RO group is greater than the first integer, the mapping method between the ROs in the first RO group set and the first SSB index is the first mapping method; case (b) indicates that when the number of ROs included in the target RO group is not greater than the first integer, the mapping method between the ROs in the second RO group set and the first SSB index is the second mapping method.

[0743] In embodiment 10, the first mapping method is different from the second mapping method.

[0744] As an embodiment, the first mapping method corresponds to the mapping method of Legacy SSB-RO.

[0745] As an embodiment, the first mapping method corresponds to the mapping method of SSB-RO in Rel-17 version.

[0746] As an embodiment, the first mapping method corresponds to the mapping method of SSB-RO in TS 38.213.

[0747] As an embodiment, the first mapping mode corresponds to:

[0748] - First, in increasing order of preamble indexes within a single RO;

[0749] - Second, sort the frequency-division multiplexed ROs in ascending order according to the frequency domain resource index;

[0750] - Third, the ROs time-division multiplexed in each PRACH time slot are sorted in ascending order according to the time domain resource index;

[0751] - Fourth, in ascending order of PRACH time slot index.

[0752] As an embodiment, the second mapping method corresponds to a non-legacy SSB-RO mapping method.

[0753] As an embodiment, the second mapping method corresponds to the mapping method of SSB-RO in Rel-18 version.

[0754] As an embodiment, the second mapping method corresponds to the SSB-RO mapping method corresponding to versions after Rel-18.

[0755] As an embodiment, the second mapping method corresponds to the mapping method of SSB-RO in TS 38.213.

[0756] As an embodiment, the second mapping mode corresponds to:

[0757] - First, in increasing order of preamble indexes within a single RO;

[0758] - Second, the ROs time-division multiplexed in each PRACH time slot are sorted in ascending order according to the time domain resource index;

[0759] - Third, sort the frequency-division multiplexed ROs in ascending order according to the frequency domain resource index;

[0760] - Fourth, in ascending order of PRACH time slot index.

[0761] Embodiment 11

[0762] Embodiment 11 illustrates a schematic diagram of symbols in a first symbol set according to an embodiment of the present application, as shown in the attached figure. Fig.11 As shown in the attached Fig.11 In the attached Fig.11 In the figure, the horizontal axis represents time and the vertical axis represents frequency; the area filled with vertical lines represents the time domain resources occupied by downlink symbols in time, the area filled with horizontal lines represents the time domain resources occupied by uplink symbols in time, the unfilled area represents the time domain resources occupied by flexible symbols in time, the area filled with solid gray represents the first subband, and the area occupied by the first subband represents the frequency domain resources in the downlink symbols and flexible symbols that can be used for uplink transmission in frequency.

[0763] In Embodiment 11, the first category of symbols includes symbols configured as downlink symbols by TDD uplink and downlink configuration signaling and used for uplink transmission, and the first symbol set includes the first category of symbols.

[0764] As an embodiment, the first category of symbols also includes symbols configured as flexible symbols by TDD uplink and downlink configuration signaling and used for uplink transmission.

[0765] As an embodiment, in the present application, the meaning that a symbol is configured as a downlink symbol includes: the type of the symbol is DL.

[0766] As an embodiment, in the present application, the meaning that a symbol is configured as an uplink symbol includes: the type of the symbol is UL.

[0767] As an embodiment, in the present application, a symbol being configured as a flexible symbol means that: the type of the symbol is F (flexible).

[0768] As an embodiment, the first subband occupies at least one RB (Resource Block) set in the frequency domain.

[0769] As a sub-embodiment of this embodiment, the one RB set is a group of continuous RBs.

[0770] As a sub-embodiment of this embodiment, the RB set is configured by a higher layer parameter "IntraCellGuardBandsPerSCS".

[0771] As a sub-embodiment of this embodiment, the RB set is configured by a higher layer parameter "intraCellGuardBandsUL-List".

[0772] As a sub-embodiment of this embodiment, a guard band exists between two adjacent RB sets.

[0773] As an embodiment, there are guard bands on both sides of the first sub-band in the frequency domain.

[0774] As an embodiment, a guard band exists on one side of the first sub-band in the frequency domain.

[0775] As an embodiment, there are no guard bands on both sides of the first sub-band in the frequency domain.

[0776] As a sub-embodiment of the above three embodiments, the guard band is not used for uplink transmission or downlink transmission.

[0777] As an embodiment, the first subband occupies at least one RB in the frequency domain.

[0778] As a sub-embodiment of this embodiment, the at least one RB includes one RB.

[0779] As a sub-embodiment of this embodiment, the at least one RB includes multiple consecutive RBs.

[0780] As an embodiment, the RB in the present application includes a PRB (Physical Resource Block).

[0781] As an embodiment, the RB in this application refers to PRB.

[0782] Typically, one RB occupies 12 consecutive subcarriers in the frequency domain.

[0783] As an embodiment, the first subband occupies multiple subcarriers in the frequency domain.

[0784] As an embodiment, the first subband belongs to a UL carrier.

[0785] As an embodiment, the frequency domain resources occupied by the first subband belong to a UL carrier.

[0786] As an embodiment, the first subband belongs to a DL carrier.

[0787] As an embodiment, the frequency domain resources occupied by the first subband belong to a DL carrier.

[0788] As an embodiment, the first subband belongs to a BWP.

[0789] As an embodiment, the first subband belongs to a UL BWP.

[0790] As an embodiment, the frequency domain resources occupied by the first subband belong to a UL BWP.

[0791] As an embodiment, the first subband belongs to a DL BWP.

[0792] As an embodiment, the frequency domain resources occupied by the first subband belong to a DL BWP.

[0793] As an embodiment, there are overlapping frequency domain resources between the first subband and a UL BWP.

[0794] As an embodiment, there are no overlapping frequency domain resources between the first subband and a UL BWP.

[0795] As an embodiment, the first sub-band includes a SBFD sub-band.

[0796] As an embodiment, the first sub-band is a SBFD sub-band.

[0797] As an embodiment, one SBFD subband described in the present application is used for uplink transmission.

[0798] As an embodiment, one SBFD subband described in the present application can (or may or is allowed to) be used for uplink transmission.

[0799] As an embodiment, the one SBFD subband described in the present application is a UL subband.

[0800] As an embodiment, the first symbol set includes a positive integer number of symbols greater than 1.

[0801] As an embodiment, the first symbol set includes the first category of symbols.

[0802] As an embodiment, the first symbol set only includes the first category of symbols.

[0803] As an embodiment, the first symbol set includes full-duplex symbols.

[0804] As an embodiment, the first symbol set includes SBFD symbols.

[0805] As an embodiment, the symbols in the first symbol set are configured for SBFD.

[0806] As an embodiment, the first symbol set includes downlink symbols used for uplink transmission indicated by the TDD uplink and downlink configuration signaling.

[0807] As an embodiment, the first symbol set includes flexible symbols used for uplink transmission indicated by the TDD uplink and downlink configuration signaling.

[0808] As an embodiment, the symbols in the first symbol set are all downlink symbols used for uplink transmission indicated by TDD uplink and downlink configuration signaling.

[0809] As an embodiment, any symbol in the first symbol set is a downlink symbol used for uplink transmission indicated by the TDD uplink and downlink configuration signaling or a flexible symbol used for uplink transmission indicated by the TDD uplink and downlink configuration.

[0810] As an embodiment, the symbols in the first symbol set are configured to be able to (or can or are allowed to) be uplink transmitted in the first subband.

[0811] As an embodiment, the symbols in the first symbol set are indicated to be able to (or may or are allowed to) be uplink transmitted in the first subband.

[0812] As an embodiment, the symbols in the first symbol set are configured to actually be uplink transmitted in the first subband.

[0813] As an embodiment, the symbols in the first symbol set are indicated to actually be uplink transmitted in the first subband.

[0814] As an embodiment, the first subband is indicated to be enabled on a symbol in the first symbol set.

[0815] As an embodiment, the RO occupying the frequency domain resources of the first subband in the first symbol set may be selected to send a random access preamble.

[0816] As an embodiment, ROs in the first symbol set that occupy frequency domain resources outside the first subband cannot be selected to send a random access preamble.

[0817] As an embodiment, the RO in the first symbol set occupying frequency domain resources overlapping the first subband and the initial BWP may be selected to send a random access preamble.

[0818] As an embodiment, the RO in the first symbol set occupying frequency domain resources overlapping the first subband and the active BWP may be selected to send a random access preamble.

[0819] As an embodiment, the symbols in the first symbol set are used for sending and receiving simultaneously.

[0820] As an embodiment, the symbols in the first symbol set support simultaneous uplink transmission and downlink transmission.

[0821] As an embodiment, the sender of the first information block simultaneously receives and sends wireless signals on symbols in the first symbol set.

[0822] As an embodiment, the sender of the first information block simultaneously performs uplink transmission and downlink transmission on the symbols in the first symbol set.

[0823] As an embodiment, the sender of the first information block receives a wireless signal on a frequency domain resource included in the first subband of the symbols in the first symbol set, and sends a wireless signal on a frequency domain resource other than the frequency domain resources included in the first subband.

[0824] As an embodiment, the sender of the first information block performs uplink transmission on the frequency domain resources included in the first subband of the symbols in the first symbol set, and performs downlink transmission on the frequency domain resources outside the frequency domain resources included in the first subband.

[0825] Example 12

[0826] Embodiment 12 illustrates a structural block diagram of a processing device used in a first node according to an embodiment of the present application, as shown in the attached figure. Fig.12 As shown in the attached Fig.12 In the embodiment, the processing device 1200 in the first node includes a first receiver 1201 and a first transmitter 1202.

[0827] In Embodiment 12, the first receiver 1201 receives a first information block, where the first information block indicates a first symbol set; the first transmitter 1202 determines a target RO group and sends a random access preamble in the target RO group.

[0828] In Example 12, the first symbol set includes at least one symbol configured as a downlink symbol by TDD uplink and downlink configuration signaling and used for uplink transmission; the target RO group includes at least one RO, and the ROs in the target RO group are all associated with the first SSB index; whether the target RO group includes the RO in the first symbol set depends on the number of ROs included in the target RO group.

[0829] As an embodiment, when the number of ROs included in the target RO group is not greater than a first integer, the first node determines whether the target RO group includes the ROs in the first symbol set; when the number of ROs included in the target RO group is greater than a first integer, the target RO group does not include the ROs in the first symbol set; the first integer is a positive integer.

[0830] As an embodiment, the first receiver 1201 receives a second information block, the number of ROs included in the target RO group is greater than the first integer, and the target RO group is an RO group in a first RO group set; the first RO group set includes multiple RO groups, each of the multiple RO groups includes N ROs, and N is a configurable positive integer greater than 1; the first RO group set includes at least part of the ROs associated with the first SSB index in an SSB-RO mapping loop; the first RO group set depends on the second information block.

[0831] As an embodiment, the number of ROs included in the target RO group is not greater than the first integer, and the target RO group is an RO group in a second RO group set; the second RO group set includes at least one RO in an SSB-RO mapping loop that is associated with the first SSB index, and the second RO group set includes at least one RO in the first symbol set; the ROs in the RO groups included in the second RO group set are all associated with the first SSB index.

[0832] As an embodiment, the first receiver 1201 receives a first signaling, wherein the first signaling indicates a first PRACH mask index value; among the ROs associated with the first SSB index in the one SSB-RO mapping cycle, only the ROs indicated by the first PRACH mask index value belong to the first RO group set.

[0833] As an embodiment, the first receiver 1201 receives a target information block; the target information block indicates that the first symbol set is used for random access, and the target RO group can include ROs in the first symbol set.

[0834] As an embodiment, when the number of ROs included in the target RO group is greater than the first integer, the mapping method between the ROs in the first RO group set and the first SSB index is a first mapping method; when the number of ROs included in the target RO group is not greater than the first integer, the mapping method between the ROs in the second RO group set and the first SSB index is a second mapping method; the first mapping method is different from the second mapping method.

[0835] As an embodiment, when the number of ROs included in the target RO group is not greater than a first integer, the target RO group does not include ROs in the first symbol set; when the number of ROs included in the target RO group is greater than a first integer, the first node determines whether the target RO group includes ROs in the first symbol set; the first integer is a positive integer.

[0836] As a sub-embodiment of this embodiment, the benefits of the above method include: when the number of ROs in the target RO group is not greater than the first integer, the first node does not use the ROs occupying full-duplex symbols to improve the success rate of the random access process.

[0837] As a sub-embodiment of this embodiment, the benefits of the above method include: using RO and PRACH repeated transmissions in the first symbol set can improve uplink coverage and reduce latency, and when the number of ROs in the target RO group is greater than the first integer, the first node determines whether sending a random access preamble in the RO occupying full-duplex symbols can achieve a balance between resource utilization and uplink coverage.

[0838] Typically, when the number of ROs included in the target RO group is not greater than a first integer, the target RO group does not include ROs in the first symbol set; when the number of ROs included in the target RO group is greater than a first integer, the target RO group includes ROs in the first symbol set; the first integer is a positive integer.

[0839] As a sub-embodiment of this embodiment, the benefits of the above method include: when the number of ROs in the target RO group is greater than the first integer, not sending a random access preamble in a RO occupying a full-duplex symbol can avoid PRACH resource waste and save power.

[0840] As an embodiment, the symbols in the first symbol set are used for sending and receiving simultaneously.

[0841] As an embodiment, the symbols in the first symbol set support simultaneous uplink transmission and downlink transmission.

[0842] As an embodiment, the sender of the first information block simultaneously receives and sends wireless signals on symbols in the first symbol set.

[0843] As an embodiment, the sender of the first information block simultaneously performs uplink transmission and downlink transmission on the symbols in the first symbol set.

[0844] As an embodiment, the first node is user equipment.

[0845] As an embodiment, the first node is a relay node device.

[0846] As an embodiment, the first receiver 1201 includes at least one of {antenna 452, receiver 454, receiving processor 456, multi-antenna receiving processor 458, controller / processor 459, memory 460, data source 467} in Embodiment 4.

[0847] As an embodiment, the first transmitter 1202 includes at least one of {antenna 452, transmitter 454, transmit processor 468, multi-antenna transmit processor 457, controller / processor 459, memory 460, data source 467} in Embodiment 4.

[0848] Example 13

[0849] Embodiment 13 illustrates a structural block diagram of a processing device used in a second node according to an embodiment of the present application, as shown in the attached figure. Fig.13 As shown in the attached Fig.13 In the embodiment, the processing device 1300 in the second node includes a second transmitter 1301 and a second receiver 1302.

[0850] In Embodiment 13, the second transmitter 1301 sends a first information block, where the first information block indicates a first symbol set; and the second receiver 1302 receives a random access preamble in a target RO group.

[0851] In Example 13, the receiver of the first information block determines the target RO group; the first symbol set includes at least one symbol configured as a downlink symbol by TDD uplink and downlink configuration signaling and used for uplink transmission; the target RO group includes at least one RO, and the ROs in the target RO group are all associated with the first SSB index; whether the target RO group includes the RO in the first symbol set depends on the number of ROs included in the target RO group.

[0852] As an embodiment, when the number of ROs included in the target RO group is not greater than a first integer, the receiver of the first information block determines whether the target RO group includes the ROs in the first symbol set; when the number of ROs included in the target RO group is greater than a first integer, the target RO group does not include the ROs in the first symbol set; the first integer is a positive integer.

[0853] As an embodiment, the second transmitter 1301 sends a second information block, the number of ROs included in the target RO group is greater than the first integer, and the target RO group is an RO group in a first RO group set; the first RO group set includes multiple RO groups, each of the multiple RO groups includes N ROs, and N is a configurable positive integer greater than 1; the first RO group set includes at least part of the ROs associated with the first SSB index in an SSB-RO mapping loop; the first RO group set depends on the second information block.

[0854] As an embodiment, the number of ROs included in the target RO group is not greater than the first integer, and the target RO group is an RO group in a second RO group set; the second RO group set includes at least one RO in an SSB-RO mapping loop that is associated with the first SSB index, and the second RO group set includes at least one RO in the first symbol set; the ROs in the RO groups included in the second RO group set are all associated with the first SSB index.

[0855] As an embodiment, the second transmitter 1301 sends a first signaling, wherein the first signaling indicates a first PRACH mask index value; among the ROs associated with the first SSB index in the one SSB-RO mapping cycle, only the ROs indicated by the first PRACH mask index value belong to the first RO group set.

[0856] As an embodiment, the second transmitter 1301 sends a target information block; the target information block indicates that the first symbol set is used for random access, and the target RO group can include ROs in the first symbol set.

[0857] As an embodiment, when the number of ROs included in the target RO group is greater than the first integer, the mapping method between the ROs in the first RO group set and the first SSB index is a first mapping method; when the number of ROs included in the target RO group is not greater than the first integer, the mapping method between the ROs in the second RO group set and the first SSB index is a second mapping method; the first mapping method is different from the second mapping method.

[0858] As an embodiment, when the number of ROs included in the target RO group is not greater than a first integer, the target RO group does not include ROs in the first symbol set; when the number of ROs included in the target RO group is greater than a first integer, the receiver of the first information block determines whether the target RO group includes ROs in the first symbol set; the first integer is a positive integer.

[0859] As a sub-embodiment of this embodiment, the benefits of the above method include: when the number of ROs in the target RO group is not greater than the first integer, not using ROs occupying full-duplex symbols can improve the success rate of the random access process.

[0860] As a sub-embodiment of this embodiment, the benefits of the above method include: using RO and PRACH repeated transmissions in the first symbol set can improve uplink coverage and reduce latency, and when the number of ROs in the target RO group is greater than the first integer, the receiver of the first information block determines whether sending a random access preamble in the RO occupying full-duplex symbols can achieve a balance between resource utilization and uplink coverage.

[0861] Typically, when the number of ROs included in the target RO group is not greater than a first integer, the target RO group does not include ROs in the first symbol set; when the number of ROs included in the target RO group is greater than a first integer, the target RO group includes ROs in the first symbol set; the first integer is a positive integer.

[0862] As a sub-embodiment of this embodiment, the benefits of the above method include: when the number of ROs in the target RO group is greater than the first integer, not sending a random access preamble in a RO occupying a full-duplex symbol can avoid PRACH resource waste and save power.

[0863] As an embodiment, the symbols in the first symbol set are used for sending and receiving simultaneously.

[0864] As an embodiment, the symbols in the first symbol set support simultaneous uplink transmission and downlink transmission.

[0865] As an embodiment, the second node simultaneously receives and sends wireless signals on symbols in the first symbol set.

[0866] As an embodiment, the second node simultaneously performs uplink transmission and downlink transmission on symbols in the first symbol set.

[0867] As an embodiment, the second node is a base station device.

[0868] As an embodiment, the second node is user equipment.

[0869] As an embodiment, the second node is a relay node device.

[0870] As an embodiment, the second transmitter 1301 includes at least one of {antenna 420, transmitter 418, transmit processor 416, multi-antenna transmit processor 471, controller / processor 475, memory 476} in Embodiment 4.

[0871] As an embodiment, the second receiver 1302 includes at least one of {antenna 420, receiver 418, receiving processor 470, multi-antenna receiving processor 472, controller / processor 475, memory 476} in Embodiment 4.

[0872] A person of ordinary skill in the art can understand that all or part of the steps in the above method can be completed by instructing the 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 function module, and the present application is not limited to any specific form of software and hardware combination. The user equipment, terminal and UE in the present application include but are not limited to drones, communication modules on drones, remote-controlled aircraft, aircraft, small aircraft, mobile phones, tablet computers, notebooks, vehicle-mounted communication equipment, transportation tools, vehicles, RSUs, wireless sensors, Internet cards, Internet of Things terminals, RFID (Radio Frequency Identification, Radio Frequency Identification Technology) terminals, NB-IoT (Narrow Band Internet of Things, Narrow Band Internet of Things) terminals, MTC (Machine Type Communication, Machine Type Communication) terminals, eMTC (enhanced MTC, enhanced MTC) terminals, data cards, Internet cards, vehicle-mounted communication equipment, low-cost mobile phones, low-cost tablet computers and other wireless communication devices. The base stations or system equipment in this application include but are not limited to macrocell base stations, microcell base stations, small cell base stations, home base stations, relay base stations, eNB (evolved Node B), gNB, TRP, GNSS (Global Navigation Satellite System), relay satellites, satellite base stations, aerial base stations, RSU, drones, test equipment, such as transceivers that simulate some functions of base stations or signaling testers and other wireless communication equipment.

[0873] It should be understood by those skilled in the art that the present invention may be implemented in other specified forms without departing from its core or essential features. Therefore, the embodiments disclosed herein should be considered illustrative rather than restrictive in any way. The scope of the invention is determined by the appended claims rather than the preceding description, and all modifications within their equivalent meanings and regions are considered to be included therein.

Claims

1. A first node used for wireless communication, characterized in that: include: A first receiver receives a first information block, wherein the first information block indicates a first set of symbols; A first transmitter determines a target RO group and sends a random access preamble in the target RO group; Among them, the first symbol set includes at least one symbol configured as a downlink symbol by TDD uplink and downlink configuration signaling and used for uplink transmission; the target RO group includes at least one RO, and the ROs in the target RO group are all associated with the first SSB index; whether the target RO group includes the RO in the first symbol set depends on the number of ROs included in the target RO group.

2. The first node according to claim 1, characterized in that: When the number of ROs included in the target RO group is not greater than a first integer, the first node determines whether the target RO group includes the ROs in the first symbol set; when the number of ROs included in the target RO group is greater than a first integer, the target RO group does not include the ROs in the first symbol set; the first integer is a positive integer.

3. The first node according to claim 2, characterized in that: include: The first receiver receives a second information block; Among them, the number of ROs included in the target RO group is greater than the first integer, and the target RO group is an RO group in a first RO group set; the first RO group set includes multiple RO groups, each of the multiple RO groups includes N ROs, and N is a configurable positive integer greater than 1; the first RO group set includes at least part of the ROs associated with the first SSB index in an SSB-RO mapping cycle; the first RO group set depends on the second information block.

4. The first node according to claim 2, characterized in that: The number of ROs included in the target RO group is not greater than the first integer, and the target RO group is an RO group in a second RO group set; the second RO group set includes at least one RO associated with the first SSB index in an SSB-RO mapping cycle, and the second RO group set includes at least one RO in the first symbol set; the ROs in the RO groups included in the second RO group set are all associated with the first SSB index.

5. The first node according to claim 3, characterized in that: include: The first receiver receives a first signaling, where the first signaling indicates a first PRACH mask index value; Among the ROs associated with the first SSB index in the one SSB-RO mapping cycle, only the ROs indicated by the first PRACH mask index value belong to the first RO group set.

6. The first node according to any one of claims 1 to 5, characterized in that: include: The first receiver receives a target information block; The target information block indicates that the first symbol set is used for random access, and the target RO group can include ROs in the first symbol set.

7. The first node according to claim 3 or 4, characterized in that: When the number of ROs included in the target RO group is greater than the first integer, the mapping manner between the ROs in the first RO group set and the first SSB index is a first mapping manner; When the number of ROs included in the target RO group is not greater than the first integer, the mapping method between the ROs in the second RO group set and the first SSB index is a second mapping method; the first mapping method is different from the second mapping method.

8. A second node used for wireless communication, characterized in that: include: A second transmitter sends a first information block, wherein the first information block indicates a first symbol set; a second receiver, receiving a random access preamble in a target RO group; Among them, the receiver of the first information block determines the target RO group; the first symbol set includes at least one symbol configured as a downlink symbol by TDD uplink and downlink configuration signaling and used for uplink transmission; the target RO group includes at least one RO, and the ROs in the target RO group are all associated with the first SSB index; whether the target RO group includes the RO in the first symbol set depends on the number of ROs included in the target RO group.

9. A method for a first node used in wireless communication, characterized in that: include: receiving a first information block, the first information block indicating a first set of symbols; determining a target RO group, and sending a random access preamble in the target RO group; Among them, the first symbol set includes at least one symbol configured as a downlink symbol by TDD uplink and downlink configuration signaling and used for uplink transmission; the target RO group includes at least one RO, and the ROs in the target RO group are all associated with the first SSB index; whether the target RO group includes the RO in the first symbol set depends on the number of ROs included in the target RO group.

10. A method for a second node used in wireless communication, characterized in that: include: Sending a first information block, wherein the first information block indicates a first set of symbols; receiving a random access preamble in a target RO group; Among them, the receiver of the first information block determines the target RO group; the first symbol set includes at least one symbol configured as a downlink symbol by TDD uplink and downlink configuration signaling and used for uplink transmission; the target RO group includes at least one RO, and the ROs in the target RO group are all associated with the first SSB index; whether the target RO group includes the RO in the first symbol set depends on the number of ROs included in the target RO group.

Images