Method and apparatus related to prach in node used for wireless communication

Abstract

The present application discloses a method and apparatus related to a PRACH in a node used for wireless communication. A first transmitter uses a first PRACH occasion to send a PRACH, the first PRACH occasion being randomly selected at an equal probability from among at least a portion of PRACH occasions in a candidate PRACH occasion set. A first parameter group comprises at least one random access parameter for full-duplex symbols. When the first parameter group is configured, the candidate PRACH occasion set is a first PRACH occasion set or a second PRACH occasion set. The first PRACH occasion set comprises at least one PRACH occasion in full-duplex symbols, and PRACH occasions in the second PRACH occasion set are all PRACH occasions in non-full-duplex symbols. When the first parameter group is not configured, the candidate PRACH occasion set comprises at least one PRACH occasion in the full-duplex symbols and at least one PRACH occasion in the non-full-duplex symbols.

Description

A method and apparatus related to PRACH in a node used for wireless communication

[0001] This application claims priority to a Chinese patent application filed with the Patent Office of China on March 19, 2024, with application number 202410316915.7 and invention name “A method and device related to PRACH in a node used for wireless communication”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to a transmission method and apparatus in a wireless communication system, and in particular to a transmission method and apparatus for wireless signals in a wireless communication system supporting a cellular network. Background Art

[0003] In existing NR (New Radio) systems, spectrum resources are statically divided into FDD (Frequency Division Duplex) and TDD (Time Division Duplex) spectrum. For TDD spectrum, both base stations and user equipment (UE) operate in half-duplex mode. This half-duplex mode avoids self-interference and mitigates the impact of cross-link interference (CLI), but it also leads to reduced resource utilization and increased latency. To address these issues, supporting flexible duplex modes or variable link directions (uplink, downlink, or flexible) in TDD or FDD spectrum is a possible solution. The 3rd Generation Partnership Project (3GPP) has agreed to conduct research on duplex technologies, specifically subband non-overlapping full-duplex (SBFD) mode for gNBs (NR Node Bs). Optimizing system design accordingly is a key component of this research.

[0004] PRACH (Physical Random Access Channel) transmission is an important aspect in wireless communications. Summary of the Invention

[0005] How to optimize the transmission performance of PRACH is a key issue that needs to be considered in system design; this application discloses a solution to the above problem. It should be noted that this application can be applicable to a variety of wireless communication scenarios, such as scenarios using SBFD mode, scenarios using other types of full-duplex modes other than SBFD, scenarios using more flexible duplex modes, etc., and achieve similar technical effects. In addition, the use of a unified solution for different scenarios (including but not limited to scenarios using SBFD mode, scenarios using other types of full-duplex modes other than SBFD, and scenarios using more flexible duplex modes) can also help reduce hardware complexity and cost, or improve performance. 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 and features in the embodiments of the present application can be arbitrarily combined with each other.

[0006] Where necessary, the interpretation of the terms in this application may refer to the description of the 3GPP specification protocols TS37 series and TS38 series.

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

[0008] transmitting a PRACH using a first PRACH opportunity, where the first PRACH opportunity is randomly selected with equal probability from at least some of the PRACH opportunities in the set of candidate PRACH opportunities;

[0009] In which, the first parameter group includes at least one random access parameter for full-duplex symbols; when the first parameter group is configured, the candidate PRACH opportunity set is the first PRACH opportunity set or the second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; when the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol and at least one PRACH opportunity in the non-full-duplex symbol.

[0010] As an embodiment, the problem to be solved by the present application includes: how to determine a PRACH opportunity for PRACH transmission in a system configured with full-duplex symbols.

[0011] As an embodiment, the problem to be solved by the present application includes: how to enhance the selection of PRACH transmission resources through flexible configuration.

[0012] As an embodiment, the benefits of the above method include: improving configuration flexibility and facilitating enhanced random access performance.

[0013] As an embodiment, the above method has the following benefits: it is facilitating the use of different methods to determine the candidate PRACH opportunity set for different scenarios, thereby improving the adaptability of PRACH transmission to the transmission scenario and optimizing PRACH resource allocation.

[0014] According to one aspect of the present application, the above method is characterized in that:

[0015] When the first parameter group is configured, the first node selects the first PRACH opportunity set or the second PRACH opportunity set as the candidate PRACH opportunity set according to a first probability distribution.

[0016] As an embodiment, the benefits of the above method include: being helpful in reducing UE processing complexity.

[0017] As an embodiment, the advantages of the above method include: good compatibility with existing 3GPP protocols and small workload for standardization.

[0018] According to one aspect of the present application, the above method is characterized in that:

[0019] When the first parameter group is not configured: the PRACH opportunities in the full-duplex symbols and the PRACH opportunities in the non-full-duplex symbols in the candidate PRACH opportunity set both depend on the configuration of the first random access parameter, and the first random access parameter is a parameter for configuring the PRACH opportunities.

[0020] As an embodiment, the benefits of the above method include: improving the utilization efficiency of configuration parameters and saving signaling overhead.

[0021] According to one aspect of the present application, the above method is characterized in that:

[0022] The first parameter group is not configured, and the at least part of the PRACH opportunities in the candidate PRACH opportunity set include at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol.

[0023] According to one aspect of the present application, the above method is characterized in that:

[0024] When the first parameter group is not configured and the at least part of the PRACH opportunities in the candidate PRACH opportunity set include at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol: the first PRACH opportunity is randomly selected with equal probability from the at least part of the PRACH opportunities in the candidate PRACH opportunity set.

[0025] As an embodiment, the characteristics of the above method include: when the first parameter group is not configured, allowing at least part of the PRACH opportunities in the candidate PRACH opportunity set to include at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol; such characteristics are conducive to providing more PRACH opportunities (in different types of symbols) for random access to choose from, thereby reducing the probability of random access collision.

[0026] According to one aspect of the present application, the above method is characterized in that:

[0027] The PRACH opportunities in the first PRACH opportunity set are all PRACH opportunities in full-duplex symbols.

[0028] As an embodiment, the benefits of the above method include: it is helpful to reduce the complexity of system design.

[0029] According to one aspect of the present application, the above method is characterized in that it includes:

[0030] Receive uplink and downlink TDD configuration signaling;

[0031] Among them, when a symbol is indicated as a downlink by the uplink and downlink TDD configuration signaling and can be used for uplink transmission, this symbol is a full-duplex symbol; when a symbol is indicated as an uplink by the uplink and downlink TDD configuration signaling, this symbol is not a full-duplex symbol; when a symbol is not a full-duplex symbol, this symbol is a non-full-duplex symbol.

[0032] According to one aspect of the present application, the above method is characterized in that:

[0033] The uplink and downlink TDD configuration signaling includes at least one of tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated.

[0034] The present application discloses a method in a second node for wireless communication, comprising:

[0035] receiving a PRACH in a first PRACH opportunity, where the first PRACH opportunity is randomly selected with equal probability from at least some of the PRACH opportunities in the set of candidate PRACH opportunities;

[0036] In which, the first parameter group includes at least one random access parameter for full-duplex symbols; when the first parameter group is configured, the candidate PRACH opportunity set is the first PRACH opportunity set or the second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; when the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol and at least one PRACH opportunity in the non-full-duplex symbol.

[0037] According to one aspect of the present application, the above method is characterized in that:

[0038] When the first parameter group is configured, the candidate PRACH opportunity set is a result of being selected from the first PRACH opportunity set and the second PRACH opportunity set according to a first probability distribution.

[0039] According to one aspect of the present application, the above method is characterized in that:

[0040] When the first parameter group is not configured: the PRACH opportunities in the full-duplex symbols and the PRACH opportunities in the non-full-duplex symbols in the candidate PRACH opportunity set both depend on the configuration of the first random access parameter, and the first random access parameter is a parameter for configuring the PRACH opportunities.

[0041] According to one aspect of the present application, the above method is characterized in that:

[0042] The first parameter group is not configured, and the at least part of the PRACH opportunities in the candidate PRACH opportunity set include at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol.

[0043] According to one aspect of the present application, the above method is characterized in that:

[0044] When the first parameter group is not configured and the at least part of the PRACH opportunities in the candidate PRACH opportunity set include at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol: the first PRACH opportunity is randomly selected with equal probability from the at least part of the PRACH opportunities in the candidate PRACH opportunity set.

[0045] According to one aspect of the present application, the above method is characterized in that:

[0046] The PRACH opportunities in the first PRACH opportunity set are all PRACH opportunities in full-duplex symbols.

[0047] According to one aspect of the present application, the above method is characterized in that it includes:

[0048] Send uplink and downlink TDD configuration signaling;

[0049] Among them, when a symbol is indicated as a downlink by the uplink and downlink TDD configuration signaling and can be used for uplink transmission, this symbol is a full-duplex symbol; when a symbol is indicated as an uplink by the uplink and downlink TDD configuration signaling, this symbol is not a full-duplex symbol; when a symbol is not a full-duplex symbol, this symbol is a non-full-duplex symbol.

[0050] According to one aspect of the present application, the above method is characterized in that:

[0051] The uplink and downlink TDD configuration signaling includes at least one of tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated.

[0052] The present application discloses a first node used for wireless communication, comprising:

[0053] A first transmitter transmits a PRACH using a first PRACH opportunity, where the first PRACH opportunity is randomly selected with equal probability from at least some of the PRACH opportunities in the candidate PRACH opportunity set;

[0054] In which, the first parameter group includes at least one random access parameter for full-duplex symbols; when the first parameter group is configured, the candidate PRACH opportunity set is the first PRACH opportunity set or the second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; when the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol and at least one PRACH opportunity in the non-full-duplex symbol.

[0055] The present application discloses a second node used for wireless communication, comprising:

[0056] a second receiver, receiving a PRACH in a first PRACH opportunity, where the first PRACH opportunity is randomly selected with equal probability from at least some of the PRACH opportunities in the candidate PRACH opportunity set;

[0057] In which, the first parameter group includes at least one random access parameter for full-duplex symbols; when the first parameter group is configured, the candidate PRACH opportunity set is the first PRACH opportunity set or the second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; when the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol and at least one PRACH opportunity in the non-full-duplex symbol. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0059] FIG1 shows a processing flow chart of a first node according to an embodiment of the present application;

[0060] FIG2 shows a schematic diagram of a network architecture according to an embodiment of the present application;

[0061] FIG3 shows a schematic diagram of a wireless protocol architecture of a user plane and a control plane according to an embodiment of the present application;

[0062] FIG4 shows a schematic diagram of a first communication device and a second communication device according to an embodiment of the present application;

[0063] FIG5 shows a signal transmission flow chart according to an embodiment of the present application;

[0064] FIG6 shows a schematic diagram illustrating a candidate PRACH opportunity set when a first parameter group is configured according to an embodiment of the present application;

[0065] FIG7 shows a schematic diagram illustrating a candidate PRACH opportunity set when the first parameter group is not configured according to an embodiment of the present application;

[0066] FIG8 is a schematic diagram illustrating at least some PRACH opportunities in a candidate PRACH opportunity set according to an embodiment of the present application;

[0067] FIG9 shows a schematic diagram illustrating a full-duplex symbol and a non-full-duplex symbol according to an embodiment of the present application;

[0068] FIG10 is a schematic diagram illustrating a first parameter group according to an embodiment of the present application;

[0069] FIG11 shows a structural block diagram of a processing device in a first node device according to an embodiment of the present application;

[0070] FIG12 shows a structural block diagram of a processing device in a second node device according to an embodiment of the present application. DETAILED DESCRIPTION

[0071] The technical solution of the present application will be further described in detail below with reference to the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

[0072] Example 1

[0073] Example 1 illustrates a processing flow chart of a first node according to an embodiment of the present application, as shown in FIG1 .

[0074] In embodiment 1, the first node in the present application sends a PRACH using a first PRACH opportunity in step 101.

[0075] In embodiment 1, the first PRACH opportunity is randomly selected with equal probability from at least part of the PRACH opportunities in the candidate PRACH opportunity set; the first parameter group includes at least one random access parameter for full-duplex symbols; when the first parameter group is configured, the candidate PRACH opportunity set is the first PRACH opportunity set or the second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; when the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol and at least one PRACH opportunity in the non-full-duplex symbol.

[0076] As an embodiment, a PRACH opportunity is an opportunity for transmitting a random access channel.

[0077] As an embodiment, a PRACH opportunity is an opportunity for transmitting a random access preamble.

[0078] As an embodiment, a PRACH opportunity belongs to resources configured for PRACH transmission.

[0079] As an embodiment, the using the first PRACH opportunity to send the PRACH includes: using the first PRACH opportunity to send a random access preamble code.

[0080] As an embodiment, the sending of PRACH using the first PRACH opportunity includes: sending a random access preamble code in the first PRACH opportunity.

[0081] As an embodiment, the first node sends PRACH in the time-frequency resources configured for the first PRACH opportunity.

[0082] As an embodiment, the candidate PRACH opportunity set includes multiple PRACH opportunities.

[0083] As an embodiment, the PRACH opportunities in the candidate PRACH opportunity set are all valid PRACH opportunities.

[0084] As an embodiment, the at least part of the PRACH opportunities in the candidate PRACH opportunity set includes multiple PRACH opportunities.

[0085] As an embodiment, the first PRACH opportunity is a PRACH opportunity in the candidate PRACH opportunity set.

[0086] As an embodiment, the first node determines the candidate PRACH opportunity set.

[0087] As an embodiment, the characteristics of the above method include: the first node needs to first determine the candidate PRACH opportunity set, and determine the first PRACH opportunity based on this; such characteristics are conducive to system optimization for random access resources.

[0088] As an embodiment, the determination of the candidate PRACH opportunity set is related to whether the first parameter group is configured or not.

[0089] As an embodiment, determination of the candidate PRACH opportunity set depends on whether the first parameter group is configured or not.

[0090] As an embodiment, when the first parameter group is configured: the first node selects between the first PRACH opportunity set and the second PRACH opportunity set, and the candidate PRACH opportunity set is a result of the selection.

[0091] As an embodiment, when the first parameter group is configured, the first node independently selects the first PRACH opportunity set or the second PRACH opportunity set as the candidate PRACH opportunity set.

[0092] As an embodiment, the advantages of the above method include: high UE processing flexibility.

[0093] As an embodiment, in order to determine the candidate PRACH opportunity set, the first node first selects at least one PRACH opportunity set that can be used for the random access process to be performed from multiple PRACH opportunity sets; when the first parameter group is configured, the at least one PRACH opportunity set includes the first PRACH opportunity set and the second PRACH opportunity set; when the first parameter group is not configured, the at least one PRACH opportunity set is a PRACH opportunity set, and the candidate PRACH opportunity set is the at least one PRACH opportunity set.

[0094] As a sub-embodiment of the above embodiment, the step of first selecting the at least one PRACH opportunity set that can be used for the random access procedure to be performed from the multiple PRACH opportunity sets exists or does not exist.

[0095] As an embodiment, each of the multiple PRACH opportunity sets includes multiple PRACH opportunities.

[0096] As an embodiment, each of the multiple PRACH opportunity sets is configurable.

[0097] As an embodiment, the PRACH opportunities in each of the multiple PRACH opportunity sets are configurable.

[0098] As an embodiment, one PRACH opportunity set among the multiple PRACH opportunity sets may be configured to be usable for some random access procedures but unusable for other random access procedures.

[0099] As an embodiment, the first parameter group includes only one parameter.

[0100] As an embodiment, the first parameter group includes multiple parameters.

[0101] As an embodiment, each parameter in the first parameter group is a random access parameter.

[0102] As an embodiment, each parameter in the first parameter group is a random access parameter for full-duplex symbols.

[0103] As an embodiment, when a parameter is a parameter for configuring a PRACH opportunity in a full-duplex symbol, the parameter is a random access parameter for the full-duplex symbol.

[0104] As an embodiment, when a parameter configuration is applicable to PRACH transmission on a full-duplex symbol, the parameter is a random access parameter for the full-duplex symbol.

[0105] As an embodiment, the first node receives a signaling including configuration information of one or more parameters in the first parameter group.

[0106] As an embodiment, when at least one parameter in the first parameter group is configured, the first parameter group is configured; when any parameter in the first parameter group is not configured, the first parameter group is not configured.

[0107] As an embodiment, when a PRACH opportunity occupies at least one full-duplex symbol in the time domain, this PRACH opportunity is a PRACH opportunity in a full-duplex symbol; when a PRACH opportunity only occupies a non-full-duplex symbol in the time domain, this PRACH opportunity is a PRACH opportunity in a non-full-duplex symbol.

[0108] As an embodiment, when a PRACH opportunity includes at least one full-duplex symbol in the time domain, this PRACH opportunity is a PRACH opportunity in a full-duplex symbol; when a PRACH opportunity includes only non-full-duplex symbols in the time domain, this PRACH opportunity is a PRACH opportunity in a non-full-duplex symbol.

[0109] As an embodiment, compared with transmission in non-full-duplex symbols, transmission on full-duplex symbols may face stronger interference; for the solution disclosed in this application, the above features are conducive to providing good robustness for PRACH transmission.

[0110] As an embodiment, in the present application: a PRACH opportunity is either within full-duplex symbols or within non-full-duplex symbols.

[0111] As an embodiment, one PRACH opportunity in a full-duplex symbol is within the full-duplex symbol, and one PRACH opportunity in a non-full-duplex symbol is within the non-full-duplex symbol.

[0112] As an embodiment, when a PRACH opportunity occupies at least one non-full-duplex symbol in the time domain, this PRACH opportunity is a PRACH opportunity in a non-full-duplex symbol; when a PRACH opportunity occupies only full-duplex symbols in the time domain, this PRACH opportunity is a PRACH opportunity in a full-duplex symbol.

[0113] As an embodiment, when a PRACH opportunity includes at least one non-full-duplex symbol in the time domain, this PRACH opportunity is a PRACH opportunity in a non-full-duplex symbol; when a PRACH opportunity includes only full-duplex symbols in the time domain, this PRACH opportunity is a PRACH opportunity in a full-duplex symbol.

[0114] As an embodiment, a PRACH opportunity is either a PRACH opportunity in a full-duplex symbol or a PRACH opportunity in a non-full-duplex symbol; a PRACH opportunity in a full-duplex symbol is not a PRACH opportunity in a non-full-duplex symbol, and a PRACH opportunity in a non-full-duplex symbol is not a PRACH opportunity in a full-duplex symbol.

[0115] As an embodiment, a PRACH opportunity is a PRACH opportunity in a full-duplex symbol or a PRACH opportunity in a non-full-duplex symbol, which is viewed from a time domain perspective.

[0116] As an embodiment, the at least part of the PRACH opportunities in the candidate PRACH opportunity set includes multiple PRACH opportunities.

[0117] As an embodiment, the at least part of the PRACH opportunities in the candidate PRACH opportunity set is the candidate PRACH opportunity set.

[0118] As an embodiment, the at least part of the PRACH opportunities in the candidate PRACH opportunity set is a proper subset of the candidate PRACH opportunity set.

[0119] As an embodiment, the first node determines the first PRACH opportunity.

[0120] As an embodiment, the first node selects a first SSB, and at least part of the PRACH opportunities in the candidate PRACH opportunity set are PRACH opportunities corresponding to the first SSB.

[0121] As a sub-embodiment of the above embodiment, the first parameter group is configured, and the candidate PRACH opportunity set is the first PRACH opportunity set.

[0122] As a sub-embodiment of the above embodiment, the first parameter group is configured, and the candidate PRACH opportunity set is the second PRACH opportunity set.

[0123] As a sub-embodiment of the above embodiment, the first parameter group is not configured.

[0124] As an embodiment, the first node first selects the first SSB, then determines the candidate PRACH opportunity set, and then randomly selects the first PRACH opportunity with equal probability from at least part of the PRACH opportunities in the candidate PRACH opportunity set.

[0125] As an embodiment, the first node first determines the candidate PRACH opportunity set, then selects the first SSB, and then randomly selects the first PRACH opportunity with equal probability from at least part of the PRACH opportunities in the candidate PRACH opportunity set.

[0126] As an embodiment, the candidate PRACH opportunity set includes Q PRACH opportunity subsets; each PRACH opportunity subset in the Q PRACH opportunity subsets corresponds to at least one SS / PBCH block index, and the at least part of the PRACH opportunities in the candidate PRACH opportunity set is a PRACH opportunity subset in the Q PRACH opportunity subsets; Q is a configurable positive integer.

[0127] As an embodiment, at least part of the PRACH opportunities in the candidate PRACH opportunity set are continuous PRACH opportunities corresponding to the first SSB.

[0128] As an embodiment, at least part of the PRACH opportunities in the candidate PRACH opportunity set are configured to be mapped to the SS / PBCH block (synchronization signals / physical broadcast channel block, SSB) index of the first SSB.

[0129] As an embodiment, when the SS / PBCH block index of an SSB is configured to be mapped to at least one PRACH opportunity, the at least one PRACH opportunity is a PRACH opportunity corresponding to this SSB.

[0130] As an embodiment, the first node selects the first SSB by itself.

[0131] As an embodiment, the first node measures the SS-RSRP of multiple SSBs; if there is at least one available SSB whose corresponding SS-RSRP is higher than a first threshold, the first SSB is an SSB whose corresponding SS-RSRP is higher than the first threshold; otherwise, the first SSB is an SSB determined by the first node itself; the first threshold is configurable.

[0132] As an embodiment, the plurality of SSBs are configurable.

[0133] As an embodiment, the first parameter group is configured, the candidate PRACH opportunity set is the first PRACH opportunity set, and the multiple SSBs include more than one SSB whose corresponding SS / PBCH block index is mapped to the first PRACH opportunity set.

[0134] As an embodiment, the first parameter group is configured, the candidate PRACH opportunity set is the second PRACH opportunity set, and the multiple SSBs include more than one SSB whose corresponding SS / PBCH block index is mapped to the second PRACH opportunity set.

[0135] As an embodiment, the first parameter group is not configured, and the multiple SSBs include more than one SSB whose corresponding SS / PBCH block index is mapped to the candidate PRACH opportunity set.

[0136] As an example, an available SSB may be used to perform SSB-RSRP measurements.

[0137] As an embodiment, an available SSB is configured to be selected to determine random access resources.

[0138] As an embodiment, the first threshold is configured by RRC signaling.

[0139] As an embodiment, the first threshold is indicated by rsrp-ThresholdSSB.

[0140] As an embodiment, the first threshold is indicated by rsrp-ThresholdSSB-SUL.

[0141] As an embodiment, the first threshold is indicated by rsrp-ThresholdCSI-RS.

[0142] As an embodiment, the first threshold is configured by MAC CE (Medium Access Control layer Control Element).

[0143] As an embodiment, the first node measures the SS-RSRP of multiple SSBs; the first SSB is an SSB with the highest SS-RSRP among the multiple SSBs.

[0144] As an embodiment, the SS-RSRP of an SSB is obtained by measuring at least a portion of the SSB.

[0145] As an embodiment, the SS-RSRP of an SSB is the linear average over the power contributions of the resource elements carrying the secondary synchronization signal in the SSB.

[0146] As an embodiment, the first node selects a first SSB and randomly selects a first random access preamble with medium probability from multiple random access preambles; the first random access preamble is sent in the first PRACH opportunity.

[0147] As an embodiment, random access preamble group B (Random Access Preambles group B) is not configured, and the multiple random access preambles are all random access preambles in random access preamble group A (Random Access Preambles group A).

[0148] As an embodiment, the multiple random access preamble codes are all configured to be mapped to the SS / PBCH block index of the first SSB.

[0149] As an embodiment, the first node selects a first CSI-RS (Channel State Information Reference Signal), and at least part of the PRACH opportunities in the candidate PRACH opportunity set include PRACH opportunities (PRACH occasions) corresponding to the first CSI-RS, and the PRACH opportunities corresponding to the first CSI-RS are configured to perform non-competitive random access when the candidate beam identified by the first CSI-RS is selected.

[0150] As a sub-embodiment of the above embodiment, the first parameter group is configured, and the candidate PRACH opportunity set is the first PRACH opportunity set.

[0151] As a sub-embodiment of the above embodiment, the first parameter group is configured, and the candidate PRACH opportunity set is the second PRACH opportunity set.

[0152] As a sub-embodiment of the above embodiment, the first parameter group is not configured.

[0153] As an embodiment, the first node first selects the first CSI-RS, then determines the candidate PRACH opportunity set, and then randomly selects the first PRACH opportunity with equal probability from at least part of the PRACH opportunities in the candidate PRACH opportunity set.

[0154] As an embodiment, the first node first determines the candidate PRACH opportunity set, then selects the first CSI-RS, and then randomly selects the first PRACH opportunity with equal probability from at least part of the PRACH opportunities in the candidate PRACH opportunity set.

[0155] As an embodiment, the first node selects the first CSI-RS by itself.

[0156] As an embodiment, the first node measures the CSI-RSRP (CSI Reference Signal Received Power) of multiple CSI-RSs, and there is at least one available CSI-RS whose corresponding CSI-RSRP is higher than a second threshold, and the second threshold is configurable; the first CSI-RS is a CSI-RS whose corresponding CSI-RSRP is higher than the second threshold.

[0157] As an embodiment, an available CSI-RS may be used to perform CSI-RSRP measurement.

[0158] As an embodiment, an available CSI-RS is configured to be selected to determine random access resources.

[0159] As an embodiment, the second threshold is configured by RRC signaling.

[0160] As an embodiment, the second threshold is indicated by rsrp-ThresholdCSI-RS.

[0161] As an embodiment, the second threshold is indicated by rsrp-ThresholdCSI-RS-SUL.

[0162] As an embodiment, the second threshold is indicated by rsrp-ThresholdCSI-RS.

[0163] As an embodiment, the second threshold is configured by MAC CE (Medium Access Control layer Control Element).

[0164] As an embodiment, the first node measures the CSI-RSRP of multiple CSI-RSs; the first CSI-RS is a CSI-RS with the highest CSI-RSRP among the multiple CSI-RSs.

[0165] As an embodiment, the CSI-RSRP of a CSI-RS is obtained by measuring at least a portion of the CSI-RS.

[0166] As an embodiment, the CSI-RSRP of a CSI-RS is the linear average over the power contributions of the resource elements of the antenna ports carrying the CSI-RS configured for RSRP measurement within the considered measurement frequency bandwidth in the configured CSI-RS occasions.

[0167] As an embodiment, the multiple CSI-RSs are configurable.

[0168] As an embodiment, the multiple CSI-RSs include at least one CSI-RS configured for the candidate PRACH opportunity set.

[0169] As an embodiment, the at least part of the PRACH opportunities in the candidate PRACH opportunity set is the candidate PRACH opportunity set.

[0170] As an embodiment, the first parameter group is not configured, and the PRACH opportunities in full-duplex symbols and the PRACH opportunities in non-full-duplex symbols in the candidate PRACH opportunity set are configured by parameters other than the first parameter group.

[0171] As an embodiment, the first PRACH opportunity set does not include PRACH opportunities in non-full-duplex symbols.

[0172] As an embodiment, the benefits of the above method include: it is helpful to reduce the complexity of system design.

[0173] As an embodiment, the first PRACH opportunity set includes at least one PRACH opportunity in a non-full-duplex symbol.

[0174] As an embodiment, when the first parameter group is not configured: the at least part of the PRACH opportunities in the candidate PRACH opportunity set includes at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol.

[0175] As an embodiment, when the first parameter group is not configured: the at least part of the PRACH opportunities in the candidate PRACH opportunity set can include at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol.

[0176] As an embodiment, the first PRACH opportunity is randomly selected with equal probability from the at least part of the PRACH opportunities in the candidate PRACH opportunity set, including:

[0177] The first node randomly selects the first PRACH opportunity from the at least part of the PRACH opportunities in the candidate PRACH opportunity set with equal probability.

[0178] As an embodiment, a symbol in the present application is a symbol in the time domain.

[0179] As an embodiment, a symbol is an OFDM (Orthogonal Frequency Division Multiplex) symbol.

[0180] As an embodiment, a symbol is a symbol in a slot.

[0181] As an embodiment, there is no symbol that is both a full-duplex symbol and a non-full-duplex symbol.

[0182] As an embodiment, when a symbol is indicated by uplink and downlink TDD configuration signaling as downlink and can be used for uplink transmission, the symbol is a full-duplex symbol.

[0183] As an embodiment, the benefits of the above method include: facilitating improvement of uplink capacity.

[0184] As an embodiment, when a symbol is indicated as uplink by uplink / downlink TDD configuration signaling, the symbol is a non-full-duplex symbol.

[0185] As an embodiment, when a symbol is configured to be usable for full-duplex operation, the symbol is a full-duplex symbol; when a symbol is configured not to be used for full-duplex operation, the symbol is a non-full-duplex symbol.

[0186] As an embodiment, when a symbol is configured to be usable for full-duplex operation, the symbol is a full-duplex symbol; when a symbol is not configured to be usable for full-duplex operation, the symbol is a non-full-duplex symbol.

[0187] As an embodiment, the symbols used for SBFD operation are full-duplex symbols, not non-full-duplex symbols.

[0188] As an embodiment, the symbols not used for SBFD operation are non-full-duplex symbols, not full-duplex symbols.

[0189] As an embodiment, SBFD symbols are full-duplex symbols, and non-SBFD symbols are non-full-duplex symbols.

[0190] As an embodiment, all symbols in a full-duplex time slot are full-duplex symbols.

[0191] As an embodiment, all symbols in a non-full-duplex time slot are non-full-duplex symbols.

[0192] Example 2

[0193] Embodiment 2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application, as shown in FIG2 . FIG2 illustrates a network architecture 200 of a 5G NR (New Radio) / LTE (Long-Term Evolution) / LTE-A (Long-Term Evolution Advanced) system. The 5G NR / LTE / LTE-A network architecture 200 may be referred to as a 5G System (5G System) / EPS (Evolved Packet System) 200 or some other suitable terminology. The 5GS / EPS 200 includes at least one of a UE (User Equipment) 201, a RAN (Radio Access Network) 202, a 5G Core Network (5G Core Network) / EPC (Evolved Packet Core) 210, a Home Subscriber Server (HSS) / UDM (Unified Data Management) 220, and an Internet service 230. 5GS / EPS can interconnect with other access networks, but these entities / interfaces are not shown for simplicity. As shown, 5GS / EPS provides packet-switched services, but those skilled in the art will readily appreciate that the various concepts presented throughout this application can be extended to networks providing circuit-switched services or other cellular networks. RAN includes node 203 and other nodes 204. Node 203 provides user and control plane protocol termination towards UE 201. Node 203 can be connected to other nodes 204 via an Xn interface (e.g., backhaul) / X2 interface. Node 203 may also be referred to as a base station, base transceiver station, radio base station, radio transceiver, transceiver function, Basic Service Set (BSS), Extended Service Set (ESS), TRP (Transmitter Receiver Point), or some other appropriate terminology. Node 203 provides an access point to 5GC / EPC 210 for UE 201.Examples of UE 201 include a cellular phone, a smartphone, a Session Initiation Protocol (SIP) phone, a laptop computer, a personal digital assistant (PDA), a satellite radio, non-terrestrial base station communications, satellite mobile communications, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a drone, an aircraft, a narrowband Internet of Things device, a machine type communication device, a land vehicle, an automobile, a wearable device, or any other similarly functional device. 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 terminology. Node 203 connects to the 5GC / EPC 210 via the S1 / NG interface. The 5GC / EPC 210 includes the MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MMEs / AMFs / SMFs 214, the S-GW (Service Gateway) / UPF (User Plane Function) 212, and the P-GW (Packet Data Network Gateway) / UPF 213. The MME / AMF / SMF 211 is the control node that handles signaling between the UE 201 and the 5GC / EPC 210. Generally, the MME / AMF / SMF 211 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through the S-GW / UPF 212, which itself is connected to the P-GW / UPF 213. The P-GW provides UE IP address allocation and other functions. The P-GW / UPF 213 is connected to the Internet Services 230. The Internet Services 230 includes the operator's corresponding Internet Protocol services, which may include the Internet, Intranet, IMS (IP Multimedia Subsystem), and packet switching services.

[0194] As an embodiment, the UE201 corresponds to the first node in this application.

[0195] As an embodiment, the gNB203 corresponds to the second node in this application.

[0196] As an embodiment, the UE201 corresponds to the first node in this application, and the gNB203 corresponds to the second node in this application.

[0197] As an embodiment, the gNB203 is a macrocellular base station.

[0198] As an embodiment, the gNB203 is a micro cell base station.

[0199] As an embodiment, the gNB203 is a picocell (PicoCell) base station.

[0200] As an embodiment, the gNB203 is a home base station (Femtocell).

[0201] As an embodiment, the gNB203 is a base station device that supports large delay difference.

[0202] As an embodiment, the gNB203 is a flying platform device.

[0203] As an embodiment, the gNB203 is a satellite device.

[0204] Example 3

[0205] Embodiment 3 illustrates a schematic diagram of an embodiment of a radio protocol architecture for a user plane and a control plane according to the present application, as shown in FIG3 . FIG3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300. FIG3 illustrates the radio protocol architecture for a first communication node device (a UE, a gNB, or an RSU (Roadside Unit) in a V2X (Vehicle to Everything) network, an onboard device, or an onboard communication module) and a second communication node device (a gNB, a UE, or an RSU in a V2X network, an onboard device, or an onboard communication module), or the control plane 300 between two UEs using three layers: Layer 1 (L1), Layer 2 (L2), and Layer 3 (L3). L1 is the lowest layer and implements various PHY (physical layer) signal processing functions. L1 will be referred to herein as PHY 301. Layer 2 (L2 layer) 305 is above PHY301 and is responsible for the link between the first communication node device and the second communication node device and the two UEs through PHY301. L2 305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate at the second communication node device. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security by encrypting data packets, and provides support for inter-zone mobility of the first communication node device between the second communication node devices. The RLC sublayer 303 provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets, and reordering of data packets to compensate for out-of-order reception due to HARQ (Hybrid Automatic Repeat Request). 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) within a cell between first communication node devices. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in L3 of the control plane 300 is responsible for obtaining radio resources (i.e., 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 and second communication node devices in the user plane 350 is substantially the same as the corresponding layers and sublayers in the control plane 300, including the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355. However, the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 also includes the SDAP (Service Data Adaptation Protocol) sublayer 356, which is responsible for mapping QoS (Quality of Service) flows and data radio bearers (DRBs) to support service diversity. Although not shown, the first communication node device may have several upper layers above the L2 layer 355, including a network layer (e.g., an 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.).

[0206] As an embodiment, the wireless protocol architecture in FIG3 is applicable to the first node in this application.

[0207] As an embodiment, the wireless protocol architecture in FIG3 is applicable to the second node in this application.

[0208] As an embodiment, the uplink and downlink TDD configuration signaling in this application is generated in the RRC sublayer 306.

[0209] As an embodiment, a PRACH in the present application is generated in the PHY 301 .

[0210] As an embodiment, a PRACH in the present application is generated in the PHY 351 .

[0211] Example 4

[0212] Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to the present application, as shown in Figure 4. 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.

[0213] The first communications 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 .

[0214] 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 .

[0215] During transmission from the first communication device 410 to the second communication device 450, upper layer data packets from the core network are provided to the controller / processor 475 at the first communication device 410. The controller / processor 475 implements L2 layer functionality. During transmission from the first communication device 410 to the second communication device 450, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the second communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for 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 the L1 layer (i.e., the physical layer). The transmit processor 416 performs coding and interleaving to facilitate forward error correction (FEC) at the second communication device 450, as well as mapping signal constellations based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), and M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming on the coded and modulated symbols to generate one or more spatial streams. The transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes it with a reference signal (e.g., a pilot) in the time 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 transmit analog precoding / beamforming operations 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, which is then provided to a different antenna 420.

[0216] During 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 via 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, which is provided to the receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 implement various L1 signal processing functions. The multi-antenna receive processor 458 performs receive analog precoding / beamforming operations on the baseband multi-carrier symbol stream from the receiver 454. The receive processor 456 converts the baseband multi-carrier symbol stream, after the receive analog precoding / beamforming operations, from the time domain to the frequency domain using a Fast Fourier Transform (FFT). In the frequency domain, the physical layer data signal and reference signal are demultiplexed by the receive processor 456, where the reference signal is used for channel estimation. The data signal undergoes multi-antenna detection in the multi-antenna receive processor 458 to recover any spatial stream destined for the second communication device 450. The symbols on each spatial stream are demodulated and recovered in the receive processor 456, and soft decisions are generated. The receive processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the first communications 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 the L2 layer. The controller / processor 459 may be associated with a memory 460 that stores program code and data. The memory 460 may be referred to as a computer-readable medium. During transmission from the first communications device 410 to the second communications device 450, the controller / processor 459 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover upper layer data packets from the core network. The upper layer data packets are then provided to all protocol layers above the L2 layer. Various control signals may also be provided to the L3 layer for L3 processing.

[0217] During transmission from the second communication device 450 to the first communication device 410, a data source 467 is used at the second communication device 450 to provide upper layer data packets to the controller / processor 459. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmission functionality at the first communication device 410 described in the transmission from the first communication device 410 to the second communication device 450, the controller / processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocation, implementing L2 layer functions for the user plane and control plane. The controller / processor 459 is also responsible for retransmission of lost packets and signaling to the first communication device 410. The transmit processor 468 performs modulation mapping and channel coding, while the multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming. The transmit processor 468 then modulates the resulting spatial stream into a multi-carrier / single-carrier symbol stream. After analog precoding and beamforming operations in the multi-antenna transmit processor 457, the stream is provided to different antennas 452 via the transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a RF symbol stream before providing it to the antenna 452.

[0218] During transmission from the second communication device 450 to the first communication device 410, the functionality at the first communication device 410 is similar to the reception functionality at the second communication device 450 described for transmission from the first communication device 410 to the second communication device 450. Each receiver 418 receives RF signals via its corresponding antenna 420, converts the received RF signals into baseband signals, and provides the baseband signals to the multi-antenna receive processor 472 and the receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 collectively implement L1 layer functionality. The controller / processor 475 implements L2 layer functionality. The controller / processor 475 may be associated with a memory 476 storing program codes and data. The memory 476 may be referred to as a computer-readable medium. During transmission from the second communication device 450 to the first communication device 410, the controller / processor 475 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover upper layer data packets from the UE 450. Upper layer packets from controller / processor 475 may be provided to the core network.

[0219] As an embodiment, the first node in the present application includes the second communication device 450 , and the second node in the present application includes the first communication device 410 .

[0220] As a sub-embodiment of the above embodiment, the first node is a user equipment, and the second node is a relay node.

[0221] As a sub-embodiment of the above embodiment, the first node is a user equipment, and the second node is a base station device.

[0222] As a sub-embodiment of the above embodiment, the first node is a relay node, and the second node is a base station device.

[0223] As an embodiment, the second communication device 450 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor. The second communication device 450 device at least: uses a first PRACH opportunity to send PRACH, the first PRACH opportunity is randomly selected with equal probability from at least part of the PRACH opportunities in the candidate PRACH opportunity set; wherein the first parameter group includes at least one random access parameter for full-duplex symbols; when the first parameter group is configured, the candidate PRACH opportunity set is the first PRACH opportunity set or the second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in full-duplex symbols, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; when the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in full-duplex symbols and at least one PRACH opportunity in non-full-duplex symbols.

[0224] As a sub-embodiment of the above embodiment, the second communication device 450 corresponds to the first node in this application.

[0225] As an embodiment, the second communication device 450 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generating an action when executed by at least one processor, the action including: using a first PRACH opportunity to send PRACH, the first PRACH opportunity being randomly selected with equal probability from at least part of the PRACH opportunities in the candidate PRACH opportunity set; wherein the first parameter group includes at least one random access parameter for full-duplex symbols; when the first parameter group is configured, the candidate PRACH opportunity set is the first PRACH opportunity set or the second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; when the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol and at least one PRACH opportunity in the non-full-duplex symbol.

[0226] As a sub-embodiment of the above embodiment, the second communication device 450 corresponds to the first node in this application.

[0227] As an embodiment, the first communication device 410 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor. The first communication device 410 device at least: receives PRACH in a first PRACH opportunity, the first PRACH opportunity being randomly selected with equal probability from at least part of the PRACH opportunities in the candidate PRACH opportunity set; wherein the first parameter group includes at least one random access parameter for full-duplex symbols; when the first parameter group is configured, the candidate PRACH opportunity set is the first PRACH opportunity set or the second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in full-duplex symbols, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; when the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in full-duplex symbols and at least one PRACH opportunity in non-full-duplex symbols.

[0228] As a sub-embodiment of the above embodiment, the first communication device 410 corresponds to the second node in this application.

[0229] As an embodiment, the first communication device 410 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generating an action when executed by at least one processor, the action including: receiving PRACH in a first PRACH opportunity, the first PRACH opportunity being randomly selected with equal probability from at least part of the PRACH opportunities in the candidate PRACH opportunity set; wherein the first parameter group includes at least one random access parameter for full-duplex symbols; when the first parameter group is configured, the candidate PRACH opportunity set is the first PRACH opportunity set or the second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; when the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol and at least one PRACH opportunity in the non-full-duplex symbol.

[0230] As a sub-embodiment of the above embodiment, the first communication device 410 corresponds to the second node in this application.

[0231] As an embodiment, at least one of {the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, the controller / processor 459, the memory 460, the data source 467} is used to receive the uplink and downlink TDD configuration signaling in this application.

[0232] As an embodiment, at least one of {the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller / processor 475, the memory 476} is used to send the uplink and downlink TDD configuration signaling in this application.

[0233] As an embodiment, at least one of {the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, the controller / processor 459, the memory 460, the data source 467} is used to transmit PRACH.

[0234] As an embodiment, at least one of {the antenna 420, the receiver 418, the multi-antenna reception processor 472, the reception processor 470, the controller / processor 475, and the memory 476} is used to receive PRACH.

[0235] Example 5

[0236] Embodiment 5 illustrates a signal transmission flow chart according to an embodiment of the present application, as shown in FIG5 . In FIG5 , the first node U1 and the second node U2 communicate via an air interface. In FIG5 , the steps in the dotted box F1 are optional.

[0237] The first node U1 receives uplink and downlink TDD configuration signaling in step S511; and sends PRACH using the first PRACH opportunity in step S512.

[0238] The second node U2 sends uplink and downlink TDD configuration signaling in step S521; and receives PRACH in the first PRACH opportunity in step S522.

[0239] In embodiment 5, the first PRACH opportunity is randomly selected with equal probability from at least part of the PRACH opportunities in the candidate PRACH opportunity set; the first parameter group includes at least one random access parameter for full-duplex symbols; when the first parameter group is configured, the candidate PRACH opportunity set is the first PRACH opportunity set or the second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; when the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol and at least one PRACH opportunity in the non-full-duplex symbol.

[0240] As a sub-embodiment of embodiment 5, when the first parameter group is configured, the first node selects the first PRACH opportunity set or the second PRACH opportunity set as the candidate PRACH opportunity set according to a first probability distribution.

[0241] As a sub-embodiment of Example 5, when the first parameter group is not configured: the PRACH opportunities in the full-duplex symbols and the PRACH opportunities in the non-full-duplex symbols in the candidate PRACH opportunity set both depend on the configuration of the first random access parameter, and the first random access parameter is a parameter for configuring the PRACH opportunities.

[0242] As a sub-embodiment of Example 5, when the first parameter group is not configured and the at least part of the PRACH opportunities in the candidate PRACH opportunity set include at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol: the first PRACH opportunity is randomly selected with equal probability from the at least part of the PRACH opportunities in the candidate PRACH opportunity set.

[0243] As a sub-embodiment of embodiment 5, the PRACH opportunities in the first PRACH opportunity set are all PRACH opportunities in full-duplex symbols.

[0244] As a sub-embodiment of Example 5, when a symbol is indicated as downlink by the uplink and downlink TDD configuration signaling and can be used for uplink transmission, this symbol is a full-duplex symbol; when a symbol is indicated as uplink by the uplink and downlink TDD configuration signaling, this symbol is not a full-duplex symbol; when a symbol is not a full-duplex symbol, this symbol is a non-full-duplex symbol; the uplink and downlink TDD configuration signaling includes at least one of tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated.

[0245] The above-mentioned embodiment 5 and its various sub-embodiments can be combined with each other arbitrarily.

[0246] As an embodiment, the first node U1 is the first node in this application.

[0247] As an embodiment, the second node U2 is the second node in this application.

[0248] As an embodiment, the first node U1 is a UE.

[0249] As an embodiment, the second node U2 is a base station.

[0250] As an embodiment, the air interface between the second node U2 and the first node U1 is a Uu interface.

[0251] As an embodiment, the air interface between the second node U2 and the first node U1 includes a cellular link.

[0252] As an embodiment, the air interface between the second node U2 and the first node U1 includes a wireless interface between a base station device and a user equipment.

[0253] As an embodiment, the air interface between the second node U2 and the first node U1 includes a wireless interface between a satellite device and a user equipment.

[0254] As an embodiment, the air interface between the second node U2 and the first node U1 includes a wireless interface between a relay device and a user equipment.

[0255] As an embodiment, the first parameter group is configured, and the configuration of the first parameter group is before the sending / receiving of the uplink / downlink TDD configuration signaling.

[0256] As an embodiment, the first parameter group is configured, and the configuration of the first parameter group is after the sending / receiving of the uplink / downlink TDD configuration signaling.

[0257] As an embodiment, the first parameter group is configured, including: the second node configuring the first parameter group to the first node.

[0258] As an embodiment, the first parameter group is configured, including: the first node receives a signaling, and the signaling includes configuration information of one or more parameters in the first parameter group.

[0259] As an embodiment, the first parameter group is configured to include:

[0260] The second node sends a signaling including configuration information of one or more parameters in the first parameter group; the first node receives the signaling.

[0261] As an embodiment, the first parameter group is not configured, including: the second node does not configure the first parameter group to the first node.

[0262] As an embodiment, the steps in the dashed box F1 exist.

[0263] As an embodiment, the steps in the dashed box F1 do not exist.

[0264] Example 6

[0265] Embodiment 6 illustrates a schematic diagram of a candidate PRACH opportunity set when the first parameter group is configured according to an embodiment of the present application, as shown in FIG6 .

[0266] In embodiment 6, the first parameter group is configured; the first node selects the first PRACH opportunity set or the second PRACH opportunity set as the candidate PRACH opportunity set according to a first probability distribution; the probability that the first node selects the first PRACH opportunity set as the candidate PRACH opportunity set is P, and the probability of selecting the second PRACH opportunity set as the candidate PRACH opportunity set is 1-P; the P is greater than 0 and less than 1.

[0267] As an embodiment, the first probability distribution is configurable.

[0268] As an embodiment, the first probability distribution is an equal probability distribution.

[0269] As an embodiment, P is equal to 0.5.

[0270] As an embodiment, P is less than 0.5.

[0271] As an embodiment, P is greater than 0.5.

[0272] As an embodiment, the P is configurable.

[0273] As an embodiment, the first PRACH opportunity set includes multiple PRACH opportunities.

[0274] As an embodiment, the second PRACH opportunity set includes multiple PRACH opportunities.

[0275] As an embodiment, the first PRACH opportunity set is configurable.

[0276] As an embodiment, the second PRACH opportunity set is configurable.

[0277] As an embodiment, the PRACH opportunities in the first PRACH opportunity set are configurable.

[0278] As an embodiment, the PRACH opportunities in the second PRACH opportunity set are configurable.

[0279] As an embodiment, one PRACH opportunity in the first PRACH opportunity set is configured by RRC signaling.

[0280] As an embodiment, one PRACH opportunity in the second PRACH opportunity set is configured by RRC signaling.

[0281] As an embodiment, at least one PRACH opportunity in a full-duplex symbol in the first PRACH opportunity set depends on the configuration of parameters in the first parameter group.

[0282] As an embodiment, the first parameter group includes configuration parameters of PRACH opportunities in full-duplex symbols.

[0283] Example 7

[0284] Embodiment 7 illustrates a schematic diagram of a candidate PRACH opportunity set when the first parameter group is not configured according to an embodiment of the present application, as shown in FIG7 .

[0285] In embodiment 7, when the first parameter group is not configured: the PRACH opportunities in the full-duplex symbols and the PRACH opportunities in the non-full-duplex symbols in the candidate PRACH opportunity set all follow the configuration of at least one parameter, each of the at least one parameter is a parameter for configuring the PRACH opportunity, and the at least one parameter includes a first random access parameter.

[0286] As an embodiment, one parameter of the at least one parameter indicates a time domain resource used for a PRACH opportunity.

[0287] As an embodiment, one parameter of the at least one parameter indicates frequency domain resources used for the PRACH opportunity.

[0288] As an embodiment, one parameter of the at least one parameter indicates a PRACH configuration index (PRACH Configuration Index).

[0289] As an embodiment, the first parameter group is not configured, and the PRACH opportunities in the full-duplex symbols in the candidate PRACH opportunity set are mapped to available time-frequency resources on the full-duplex symbols according to the indication of the at least one parameter.

[0290] As an embodiment, the first parameter group is not configured, and the PRACH opportunities in the non-full-duplex symbols in the candidate PRACH opportunity set are mapped to available time-frequency resources on the non-full-duplex symbols according to the indication of the at least one parameter.

[0291] As an embodiment, the first node receives a signaling including configuration information of the at least one parameter.

[0292] As an embodiment, the second node sends a signaling, and the signaling includes configuration information of the at least one parameter.

[0293] As an embodiment, when the first parameter group is not configured: the PRACH opportunities in the full-duplex symbols and the PRACH opportunities in the non-full-duplex symbols in the candidate PRACH opportunity set both depend on the configuration of the first random access parameter, and the first random access parameter is a parameter for configuring the PRACH opportunities.

[0294] As an embodiment, the first random access parameter indicates a time domain resource used for a PRACH opportunity.

[0295] As an embodiment, the first random access parameter indicates frequency domain resources used for PRACH opportunities.

[0296] As an embodiment, the first parameter group is not configured, and the PRACH opportunities in the full-duplex symbols in the candidate PRACH opportunity set are mapped to available frequency domain resources on the full-duplex symbols according to the indication of the first random access parameter.

[0297] As an embodiment, the first parameter group is not configured, and the PRACH opportunities in the non-full-duplex symbols in the candidate PRACH opportunity set are mapped to available frequency domain resources on the non-full-duplex symbols as indicated by the first random access parameter.

[0298] As an embodiment, the first random access parameter indicates a PRACH configuration index (PRACH Configuration Index).

[0299] As an embodiment, the first node receives a signaling including configuration information of the first random access parameter.

[0300] As an embodiment, the second node sends a signaling, and the signaling includes configuration information of the first random access parameter.

[0301] Example 8

[0302] Embodiment 8 illustrates a schematic diagram of at least some PRACH opportunities in a candidate PRACH opportunity set according to an embodiment of the present application, as shown in FIG8. In FIG8, a gray filled box represents a PRACH opportunity in the at least some PRACH opportunities in the candidate PRACH opportunity set.

[0303] In embodiment 8, from the perspective of time-frequency domain, the at least part of the PRACH opportunities in the candidate PRACH opportunity set includes 4 PRACH opportunities.

[0304] As an embodiment, the at least part of the PRACH opportunities in the candidate PRACH opportunity set includes multiple PRACH opportunities.

[0305] As an embodiment, the at least part of the PRACH opportunities in the candidate PRACH opportunity set includes 2 PRACH opportunities.

[0306] As an embodiment, the at least part of the PRACH opportunities in the candidate PRACH opportunity set includes more than 4 PRACH opportunities.

[0307] As an embodiment, the at least part of the PRACH opportunities in the candidate PRACH opportunity set is the candidate PRACH opportunity set.

[0308] As an embodiment, the at least part of the PRACH opportunities in the candidate PRACH opportunity set is a proper subset of the candidate PRACH opportunity set.

[0309] As an embodiment, the at least part of the PRACH opportunities in the candidate PRACH opportunity set include consecutive PRACH opportunities.

[0310] As an embodiment, the first node selects the first SSB in this application, and at least part of the PRACH opportunities in the candidate PRACH opportunity set are PRACH opportunities corresponding to the first SSB.

[0311] As a sub-embodiment of the above embodiment, the first parameter group is configured, and the candidate PRACH opportunity set is the first PRACH opportunity set.

[0312] As a sub-embodiment of the above embodiment, the first parameter group is configured, and the candidate PRACH opportunity set is the second PRACH opportunity set.

[0313] As a sub-embodiment of the above embodiment, the first parameter group is not configured.

[0314] As an embodiment, the candidate PRACH opportunity set includes Q PRACH opportunity subsets; each PRACH opportunity subset in the Q PRACH opportunity subsets corresponds to at least one SS / PBCH block index, and the at least part of the PRACH opportunities in the candidate PRACH opportunity set is a PRACH opportunity subset in the Q PRACH opportunity subsets; Q is a configurable positive integer.

[0315] As an embodiment, at least part of the PRACH opportunities in the candidate PRACH opportunity set are continuous PRACH opportunities corresponding to the first SSB.

[0316] As an embodiment, at least part of the PRACH opportunities in the candidate PRACH opportunity set are configured to be mapped to the SS / PBCH block (synchronization signals / physical broadcast channel block, SSB) index of the first SSB.

[0317] As an embodiment, the first node selects the first CSI-RS in the present application, and the at least part of the PRACH opportunities in the candidate PRACH opportunity set include PRACH opportunities (PRACH occasions) corresponding to the first CSI-RS, and the PRACH opportunities corresponding to the first CSI-RS are configured to perform non-competitive random access when the candidate beam identified by the first CSI-RS is selected.

[0318] As a sub-embodiment of the above embodiment, the first parameter group is configured, and the candidate PRACH opportunity set is the first PRACH opportunity set.

[0319] As a sub-embodiment of the above embodiment, the first parameter group is configured, and the candidate PRACH opportunity set is the second PRACH opportunity set.

[0320] As a sub-embodiment of the above embodiment, the first parameter group is not configured.

[0321] Example 9

[0322] Embodiment 9 illustrates a schematic diagram of full-duplex symbols and non-full-duplex symbols according to an embodiment of the present application, as shown in FIG9 .

[0323] In embodiment 9, when a symbol is indicated as downlink by uplink / downlink TDD configuration signaling and can be used for uplink transmission, this symbol is a full-duplex symbol; when a symbol is indicated as uplink by uplink / downlink TDD configuration signaling, this symbol is a non-full-duplex symbol.

[0324] As an embodiment, the symbols indicated as downlink by the uplink / downlink TDD configuration signaling and available for uplink transmission are full-duplex symbols.

[0325] As an embodiment, in combination with the above features, the method disclosed in the present application is conducive to improving the transmission performance of PRACH on symbols indicated as downlink by the uplink and downlink TDD configuration signaling and available for uplink transmission.

[0326] As an embodiment, any full-duplex symbol is a symbol indicated as a downlink symbol by the uplink / downlink TDD configuration signaling and can be used for uplink transmission.

[0327] As an embodiment, there is a full-duplex symbol that is not indicated as a downlink symbol by the uplink / downlink TDD configuration signaling and can be used for uplink transmission.

[0328] As an embodiment, whether a flexible symbol is a full-duplex symbol is configurable.

[0329] As an embodiment, whether a flexible symbol is a full-duplex symbol is configured by RRC signaling.

[0330] As an embodiment, there is one flexible symbol configured as a full-duplex symbol.

[0331] As an embodiment, a symbol indicated as downlink by the uplink / downlink TDD configuration signaling and available for uplink transmission is indicated as downlink by the uplink / downlink TDD configuration signaling, and this symbol can be used for uplink transmission.

[0332] As an embodiment, there is at least one symbol indicated as a downlink symbol by the uplink / downlink TDD configuration signaling that is not a full-duplex symbol.

[0333] As an embodiment, whether a symbol indicated as a downlink symbol by the uplink / downlink TDD configuration signaling is a full-duplex symbol is configurable.

[0334] As an embodiment, whether a downlink symbol indicated by the uplink and downlink TDD configuration signaling is a full-duplex symbol is configured by RRC signaling.

[0335] As an embodiment, the symbols indicated by the uplink / downlink TDD configuration signaling as downlink symbols and unavailable for uplink transmission are not full-duplex symbols.

[0336] As an embodiment, the symbols indicated as downlink by the uplink / downlink TDD configuration signaling and available for uplink transmission are full-duplex symbols; the symbols indicated as downlink by the uplink / downlink TDD configuration signaling and unavailable for uplink transmission are non-full-duplex symbols.

[0337] As an embodiment, symbols indicated as uplink by the uplink / downlink TDD configuration signaling are not available for downlink transmission.

[0338] As an embodiment, the signal that can be used for uplink transmission includes: at least being used for PUSCH (Physical Uplink Shared CHannel, physical uplink shared channel) transmission (transmission(s)).

[0339] As an embodiment, combined with the above features, the method disclosed in this application is conducive to significantly improving the uplink capacity of the system.

[0340] As an embodiment, the signal that can be used for uplink transmission includes: at least signal that can be used for PUSCH and PUCCH (Physical Uplink Control CHannel, physical uplink control channel) transmission (transmission(s)).

[0341] As an embodiment, the data that can be used for uplink transmission includes: at least being used for PUSCH and PRACH transmission (transmission(s)).

[0342] As an embodiment, the data that can be used for uplink transmission includes: at least being used for PUCCH and PRACH transmission (transmission(s)).

[0343] As an embodiment, the data that can be used for uplink transmission includes: at least being used for PUSCH transmission, PUCCH transmission and PRACH transmission (transmission(s)).

[0344] As an embodiment, the signal that can be used for uplink transmission includes: at least one of PUSCH transmission, PUCCH transmission, PRACH (Physical Random Access CHannel) transmission (transmission(s)) and SRS (Sounding Reference Signal) transmission (transmission(s)).

[0345] As an embodiment, the signal that can be used for uplink transmission includes: signal that can be used for at least two of PUSCH transmission, PUCCH transmission, PRACH transmission and SRS transmission.

[0346] As an embodiment, the signal that can be used for uplink transmission includes: signal that can be used for at least three of PUSCH transmission, PUCCH transmission, PRACH transmission and SRS transmission.

[0347] As an embodiment, the signal that can be used for uplink transmission includes: signal that can be used for PUSCH transmission, PUCCH transmission, PRACH transmission and SRS transmission.

[0348] As an embodiment, the signal that can be used for uplink transmission includes: signal that can be used for UL-SCH (Uplink Shared Channel(s)) transmission.

[0349] As an embodiment, the uplink / downlink TDD (Time Division Duplex) configuration signaling is signaling indicating the link direction of the symbol.

[0350] As an embodiment, the uplink and downlink TDD configuration signaling indicates at least one symbol as downlink.

[0351] As an embodiment, the uplink and downlink TDD configuration signaling indicates at least one symbol as uplink.

[0352] As an embodiment, the uplink and downlink TDD configuration signaling is RRC signaling.

[0353] As an embodiment, the benefits of the above method include: high reliability of signaling transmission.

[0354] As an embodiment, the uplink and downlink TDD configuration signaling is tdd-UL-DL-ConfigurationCommon.

[0355] As an embodiment, the benefits of the above method include: the uplink and downlink TDD configuration signaling can be applicable to multiple users, which is conducive to reducing control signaling overhead.

[0356] As an embodiment, the uplink and downlink TDD configuration signaling is tdd-UL-DL-ConfigurationDedicated.

[0357] As an embodiment, the uplink and downlink TDD configuration signaling includes tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated.

[0358] As an embodiment, the uplink and downlink TDD configuration signaling includes at least one of tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated.

[0359] As an embodiment, the uplink and downlink TDD configuration signaling includes tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated.

[0360] As an embodiment, when a symbol is indicated as uplink / downlink by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated, this symbol is a symbol indicated as uplink / downlink by the uplink / downlink TDD configuration signaling.

[0361] Example 10

[0362] Embodiment 10 illustrates a schematic diagram of a first parameter group according to an embodiment of the present application, as shown in FIG10 .

[0363] In embodiment 10, the first node determines whether the first parameter group is configured.

[0364] As an embodiment, the first parameter group includes higher layer parameters.

[0365] As an embodiment, the first parameter group is an information element of the RRC layer.

[0366] As an embodiment, the first parameter group is configured to the first node by the second node; or, the first parameter group is not configured.

[0367] As an embodiment, when the information element to which the first parameter group belongs is not configured, the first parameter group is not configured.

[0368] As an embodiment, when the first node does not receive configuration information of the first parameter group, the first parameter group is not configured; when the first node receives configuration information of at least one parameter in the first parameter group, the first parameter group is configured.

[0369] As an embodiment, when at least one parameter in the first parameter group is configured, the first parameter group is configured; when any parameter in the first parameter group is not configured, the first parameter group is not configured.

[0370] As an embodiment, the first parameter group includes only one parameter.

[0371] As an embodiment, the first parameter group includes multiple parameters.

[0372] Example 11

[0373] Embodiment 11 illustrates a structural block diagram of a processing device in a first node device, as shown in FIG11. In FIG11, the first node device processing device A00 includes a first receiver A01 and a first transmitter A02.

[0374] As an embodiment, the first node device A00 is a user equipment.

[0375] As an embodiment, the first node device A00 is a relay node.

[0376] As an embodiment, the first node device A00 is a vehicle-mounted communication device.

[0377] As an embodiment, the first node device A00 is a conventional user equipment.

[0378] As an embodiment, the first node device A00 is a UE with relevant configuration supporting full-duplex operation (non-overlapping sub-bands or other types).

[0379] As an embodiment, the first receiver A01 includes at least one of the antenna 452, receiver 454, multi-antenna receiving processor 458, receiving processor 456, controller / processor 459, memory 460 and data source 467 in Figure 4 of the present application.

[0380] As an embodiment, the first receiver A01 includes at least the first five of the antenna 452, receiver 454, multi-antenna receiving processor 458, receiving processor 456, controller / processor 459, memory 460 and data source 467 in Figure 4 of the present application.

[0381] As an embodiment, the first receiver A01 includes at least the first four of the antenna 452, receiver 454, multi-antenna receiving processor 458, receiving processor 456, controller / processor 459, memory 460 and data source 467 in Figure 4 of the present application.

[0382] As an embodiment, the first receiver A01 includes at least the first three of the antenna 452, receiver 454, multi-antenna receiving processor 458, receiving processor 456, controller / processor 459, memory 460 and data source 467 in Figure 4 of the present application.

[0383] As an embodiment, the first receiver A01 includes at least the first two of the antenna 452, receiver 454, multi-antenna receiving processor 458, receiving processor 456, controller / processor 459, memory 460 and data source 467 in Figure 4 of the present application.

[0384] As an embodiment, the first transmitter A02 includes at least one of the antenna 452, transmitter 454, multi-antenna transmit processor 457, transmit processor 468, controller / processor 459, memory 460 and data source 467 in FIG4 of the present application.

[0385] As an embodiment, the first transmitter A02 includes at least the first five of the antenna 452, transmitter 454, multi-antenna transmit processor 457, transmit processor 468, controller / processor 459, memory 460 and data source 467 in FIG4 of the present application.

[0386] As an embodiment, the first transmitter A02 includes at least the first four of the antenna 452, transmitter 454, multi-antenna transmit processor 457, transmit processor 468, controller / processor 459, memory 460 and data source 467 in FIG4 of the present application.

[0387] As an embodiment, the first transmitter A02 includes at least the first three of the antenna 452, transmitter 454, multi-antenna transmit processor 457, transmit processor 468, controller / processor 459, memory 460 and data source 467 in FIG4 of the present application.

[0388] As an embodiment, the first transmitter A02 includes at least the first two of the antenna 452, transmitter 454, multi-antenna transmit processor 457, transmit processor 468, controller / processor 459, memory 460 and data source 467 in FIG4 of the present application.

[0389] As an embodiment, the first transmitter A02 uses a first PRACH opportunity to send PRACH, and the first PRACH opportunity is randomly selected with equal probability from at least part of the PRACH opportunities in the candidate PRACH opportunity set; wherein, the first parameter group includes at least one random access parameter for full-duplex symbols; when the first parameter group is configured, the candidate PRACH opportunity set is the first PRACH opportunity set or the second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; when the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol and at least one PRACH opportunity in the non-full-duplex symbol.

[0390] As an embodiment, when the first parameter group is configured, the first node selects the first PRACH opportunity set or the second PRACH opportunity set as the candidate PRACH opportunity set according to a first probability distribution.

[0391] As an embodiment, when the first parameter group is not configured: the PRACH opportunities in the full-duplex symbols and the PRACH opportunities in the non-full-duplex symbols in the candidate PRACH opportunity set both depend on the configuration of the first random access parameter, and the first random access parameter is a parameter for configuring the PRACH opportunities.

[0392] As an embodiment, the first parameter group is not configured, and the at least part of the PRACH opportunities in the candidate PRACH opportunity set includes at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol.

[0393] As an embodiment, when the first parameter group is not configured and the at least part of the PRACH opportunities in the candidate PRACH opportunity set include at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol: the first PRACH opportunity is randomly selected with equal probability from the at least part of the PRACH opportunities in the candidate PRACH opportunity set.

[0394] As an embodiment, the PRACH opportunities in the first PRACH opportunity set are all PRACH opportunities in full-duplex symbols.

[0395] As an embodiment, the first receiver A01 receives uplink and downlink TDD configuration signaling; wherein, when a symbol is indicated as downlink by the uplink and downlink TDD configuration signaling and can be used for uplink transmission, this symbol is a full-duplex symbol; when a symbol is indicated as uplink by the uplink and downlink TDD configuration signaling, this symbol is not a full-duplex symbol; when a symbol is not a full-duplex symbol, this symbol is a non-full-duplex symbol.

[0396] As an embodiment, the uplink and downlink TDD configuration signaling includes at least one of tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated.

[0397] As an embodiment, the first transmitter A02 uses a first PRACH opportunity to send PRACH, and the first PRACH opportunity is randomly selected with equal probability from at least part of the PRACH opportunities in the candidate PRACH opportunity set; wherein the first parameter group includes at least one random access parameter for full-duplex symbols; when the first parameter group is configured, the candidate PRACH opportunity set is the first PRACH opportunity set or the second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; when the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol and at least one PRACH opportunity in the non-full-duplex symbol, Both the PRACH opportunities in the full-duplex symbols and the PRACH opportunities in the non-full-duplex symbols in the candidate PRACH opportunity set depend on the configuration of the first random access parameter, which is a parameter for configuring the PRACH opportunities; when the first parameter group is not configured and the at least part of the PRACH opportunities in the candidate PRACH opportunity set include at least one PRACH opportunity in the full-duplex symbols and at least one PRACH opportunity in the non-full-duplex symbols, the first PRACH opportunity is randomly selected with equal probability from the at least part of the PRACH opportunities in the candidate PRACH opportunity set; when a symbol is indicated as downlink by the uplink and downlink TDD configuration signaling and can be used for uplink transmission, this symbol is a full-duplex symbol; when a symbol is indicated as uplink by the uplink and downlink TDD configuration signaling, this symbol is a non-full-duplex symbol.

[0398] As a sub-embodiment of the above embodiment, when the first parameter group is configured, the first node selects the first PRACH opportunity set or the second PRACH opportunity set as the candidate PRACH opportunity set according to a first probability distribution.

[0399] As a sub-embodiment of the above embodiment, the PRACH opportunities in the first PRACH opportunity set are all PRACH opportunities in full-duplex symbols.

[0400] Example 12

[0401] Embodiment 12 illustrates a structural block diagram of a processing device in a second node device, as shown in FIG12. In FIG12, the second node device processing device B00 includes a second transmitter B01 and a second receiver B02.

[0402] As an embodiment, the second node device B00 is a base station.

[0403] As an embodiment, the second node device B00 is a satellite device.

[0404] As an embodiment, the second node device B00 is a relay node.

[0405] As an embodiment, the second node device B00 is a base station supporting full-duplex operation (non-overlapping sub-bands or other types).

[0406] As an embodiment, the second node device B00 is one of a test device, a test equipment, and a test instrument.

[0407] As an embodiment, the second transmitter B01 includes at least one of the antenna 420, transmitter 418, multi-antenna transmission processor 471, transmission processor 416, controller / processor 475 and memory 476 in FIG. 4 of the present application.

[0408] As an embodiment, the second transmitter B01 includes at least the first five of the antenna 420, transmitter 418, multi-antenna transmit processor 471, transmit processor 416, controller / processor 475 and memory 476 in FIG. 4 of the present application.

[0409] As an embodiment, the second transmitter B01 includes at least the first four of the antenna 420, transmitter 418, multi-antenna transmit processor 471, transmit processor 416, controller / processor 475 and memory 476 in FIG. 4 of the present application.

[0410] As an embodiment, the second transmitter B01 includes at least the first three of the antenna 420, transmitter 418, multi-antenna transmit processor 471, transmit processor 416, controller / processor 475 and memory 476 in FIG. 4 of the present application.

[0411] As an embodiment, the second transmitter B01 includes at least the first two of the antenna 420, transmitter 418, multi-antenna transmit processor 471, transmit processor 416, controller / processor 475 and memory 476 in FIG. 4 of the present application.

[0412] As an embodiment, the second receiver B02 includes at least one of the antenna 420, receiver 418, multi-antenna reception processor 472, reception processor 470, controller / processor 475 and memory 476 in FIG. 4 of the present application.

[0413] As an embodiment, the second receiver B02 includes at least the first five of the antenna 420, receiver 418, multi-antenna reception processor 472, reception processor 470, controller / processor 475 and memory 476 in FIG. 4 of the present application.

[0414] As an embodiment, the second receiver B02 includes at least the first four of the antenna 420, receiver 418, multi-antenna reception processor 472, reception processor 470, controller / processor 475 and memory 476 in FIG. 4 of the present application.

[0415] As an embodiment, the second receiver B02 includes at least the first three of the antenna 420, receiver 418, multi-antenna receiving processor 472, receiving processor 470, controller / processor 475 and memory 476 in FIG. 4 of the present application.

[0416] As an embodiment, the second receiver B02 includes at least the first two of the antenna 420, receiver 418, multi-antenna reception processor 472, reception processor 470, controller / processor 475 and memory 476 in FIG. 4 of the present application.

[0417] As an embodiment, the second receiver B02 receives PRACH in a first PRACH opportunity, and the first PRACH opportunity is randomly selected with equal probability from at least part of the PRACH opportunities in the candidate PRACH opportunity set; wherein, the first parameter group includes at least one random access parameter for full-duplex symbols; when the first parameter group is configured, the candidate PRACH opportunity set is the first PRACH opportunity set or the second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; when the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in the full-duplex symbol and at least one PRACH opportunity in the non-full-duplex symbol.

[0418] As an embodiment, when the first parameter group is configured, the candidate PRACH opportunity set is a result of being selected from the first PRACH opportunity set and the second PRACH opportunity set according to a first probability distribution.

[0419] As an embodiment, when the first parameter group is not configured: the PRACH opportunities in the full-duplex symbols and the PRACH opportunities in the non-full-duplex symbols in the candidate PRACH opportunity set both depend on the configuration of the first random access parameter, and the first random access parameter is a parameter for configuring the PRACH opportunities.

[0420] As an embodiment, the first parameter group is not configured, and the at least part of the PRACH opportunities in the candidate PRACH opportunity set includes at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol.

[0421] As an embodiment, when the first parameter group is not configured and the at least part of the PRACH opportunities in the candidate PRACH opportunity set include at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol: the first PRACH opportunity is randomly selected with equal probability from the at least part of the PRACH opportunities in the candidate PRACH opportunity set.

[0422] As an embodiment, the PRACH opportunities in the first PRACH opportunity set are all PRACH opportunities in full-duplex symbols.

[0423] As an embodiment, the second transmitter B01 sends uplink and downlink TDD configuration signaling; wherein, when a symbol is indicated as downlink by the uplink and downlink TDD configuration signaling and can be used for uplink transmission, this symbol is a full-duplex symbol; when a symbol is indicated as uplink by the uplink and downlink TDD configuration signaling, this symbol is not a full-duplex symbol; when a symbol is not a full-duplex symbol, this symbol is a non-full-duplex symbol.

[0424] As an embodiment, the uplink and downlink TDD configuration signaling includes at least one of tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated.

[0425] Those skilled in the art will appreciate that all or part of the steps in the above method can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk or an optical disk. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment can be implemented in the form of hardware or in the form of a software functional module. This application is not limited to any specific form of combination of software and hardware. The user equipment, terminal and UE in this 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 vehicles, vehicles, RSUs, wireless sensors, internet cards, Internet of Things terminals, RFID (Radio Frequency Identification) terminals, NB-IoT (Narrow Band Internet of Things) terminals, MTC (Machine Type Communication) terminals, eMTC (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, RSUs, drones, test equipment, such as transceivers or signaling testers that simulate some functions of base stations, and other wireless communication equipment.

[0426] Those skilled in the art will appreciate that the present invention may be implemented in other specific forms without departing from its core or essential characteristics. Therefore, the presently disclosed embodiments should be considered in all respects as illustrative and not restrictive. The scope of the invention is determined by the appended claims, not the foregoing description, and all modifications that come within the meaning and range of equivalents are intended to be embraced therein.

Claims

1. A first node used for wireless communication, characterized in that: include: A first transmitter transmits a PRACH using a first PRACH opportunity, where the first PRACH opportunity is randomly selected with equal probability from at least some of the PRACH opportunities in the candidate PRACH opportunity set; The first parameter group includes at least one random access parameter for a full-duplex symbol; when the first parameter group is configured, the candidate PRACH opportunity set is a first PRACH opportunity set or a second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in a full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; When the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol.

2. The first node according to claim 1, wherein: When the first parameter group is configured, the first node selects the first PRACH opportunity set or the second PRACH opportunity set as the candidate PRACH opportunity set according to a first probability distribution.

3. The first node according to claim 1 or 2, characterized in that When the first parameter group is not configured: the PRACH opportunities in the full-duplex symbols and the PRACH opportunities in the non-full-duplex symbols in the candidate PRACH opportunity set both depend on the configuration of the first random access parameter, and the first random access parameter is a parameter for configuring the PRACH opportunities.

4. The first node according to any one of claims 1 to 3, characterized in that: When the first parameter group is not configured and the at least part of the PRACH opportunities in the candidate PRACH opportunity set include at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol: the first PRACH opportunity is randomly selected with equal probability from the at least part of the PRACH opportunities in the candidate PRACH opportunity set.

5. The first node according to any one of claims 1 to 4, characterized in that: The PRACH opportunities in the first PRACH opportunity set are all PRACH opportunities in full-duplex symbols.

6. The first node according to any one of claims 1 to 5, characterized in that: include: A first receiver receives uplink and downlink TDD configuration signaling; Among them, when a symbol is indicated as a downlink by the uplink and downlink TDD configuration signaling and can be used for uplink transmission, this symbol is a full-duplex symbol; when a symbol is indicated as an uplink by the uplink and downlink TDD configuration signaling, this symbol is not a full-duplex symbol; when a symbol is not a full-duplex symbol, this symbol is a non-full-duplex symbol.

7. The first node according to claim 6, characterized in that The uplink and downlink TDD configuration signaling includes at least one of tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated.

8. A second node used for wireless communication, characterized in that: include: a second receiver, receiving a PRACH in a first PRACH opportunity, where the first PRACH opportunity is randomly selected with equal probability from at least some of the PRACH opportunities in the candidate PRACH opportunity set; The first parameter group includes at least one random access parameter for a full-duplex symbol; when the first parameter group is configured, the candidate PRACH opportunity set is a first PRACH opportunity set or a second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in a full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; When the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol.

9. A method in a first node for wireless communication, characterized in that: include: transmitting a PRACH using a first PRACH opportunity, where the first PRACH opportunity is randomly selected with equal probability from at least some of the PRACH opportunities in the set of candidate PRACH opportunities; The first parameter group includes at least one random access parameter for a full-duplex symbol; when the first parameter group is configured, the candidate PRACH opportunity set is a first PRACH opportunity set or a second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in a full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; When the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol.

10. A method in a second node for wireless communication, characterized in that: include: receiving a PRACH in a first PRACH opportunity, where the first PRACH opportunity is randomly selected with equal probability from at least some of the PRACH opportunities in the set of candidate PRACH opportunities; The first parameter group includes at least one random access parameter for a full-duplex symbol; when the first parameter group is configured, the candidate PRACH opportunity set is a first PRACH opportunity set or a second PRACH opportunity set, the first PRACH opportunity set includes at least one PRACH opportunity in a full-duplex symbol, and the PRACH opportunities in the second PRACH opportunity set are all PRACH opportunities in non-full-duplex symbols; When the first parameter group is not configured, the candidate PRACH opportunity set includes at least one PRACH opportunity in a full-duplex symbol and at least one PRACH opportunity in a non-full-duplex symbol.

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