Method and apparatus for supporting reporting of random access records in wireless communication

Abstract

Disclosed in the present application are a method and apparatus for supporting the reporting of random access records in wireless communication. A first node executes a first random access procedure; and after the first random access procedure is successful or fails, the content of a first variable is set, the first variable comprising at least one sub-variable, wherein the step of executing a first random access procedure comprises sending at least one random access preamble, the content of the first variable depends on at least the former of an SBFD symbol and a non-SBFD symbol which are associated with a random access resource used in the first random access procedure, the SBFD symbol is a symbol carrying a first sub-band used for an SBFD operation, and the first sub-band is located in a UL BWP. The present application can effectively support the reporting of random access execution records in an SBFD system, so as to optimize the network performance.

Description

A method and apparatus for supporting random access record reporting in wireless communication

[0001] This application claims priority to the Chinese patent application No. 202411257205.8, filed on September 6, 2024, entitled "A method and apparatus for supporting random access record reporting in wireless communication" and the Chinese patent application No. 202411268531.9, filed on September 10, 2024, entitled "A method and apparatus for supporting random access record reporting in wireless communication", the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to a method and apparatus in a wireless communication system, and in particular, to a method and apparatus for supporting random access (RA) record reporting in wireless communication. BACKGROUND

[0003] The application scenarios of future wireless communication systems are increasingly diversified, and different application scenarios put forward different performance requirements for the system. In order to meet the different performance requirements of various application scenarios, it is decided at the 72nd plenary meeting of 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) to study the new radio technology (NR, New Radio) (or 5G), and the new radio technology (NR, New Radio) WI (Work Item) is passed at the 75th plenary meeting of 3GPP RAN, and the standardization work of NR is started.

[0004] Random access is a common method in cellular communication, and uplink synchronization and uplink transmission resources can be obtained through a 4-step random access process or a 2-step random access process.

[0005] FD (Full Duplex) can significantly improve the spectrum efficiency and thus become a research hotspot, among which SBFD (SubBand non-overlapping Full Duplex) has particularly attracted the research interest of the industry. SUMMARY

[0006] To optimize network performance, a network can request a UE (User Equipment) to report logged information, including random access resource information used in a random access procedure. The random access resource used in a random access procedure in an SBFD scenario is more complex, and the UE needs to log additional information for reporting. This application discloses a solution. Embodiments and features in embodiments of this application can be arbitrarily combined with each other without conflict. Further, although the original intention of this application is to target the Uu air interface, this application can also be used for the PC5 interface. Further, although the original intention of this application is to target the SBFD scenario, this application is also applicable to other non-SBFD scenarios facing similar problems, achieving similar technical effects. In addition, the use of a unified solution in different scenarios also helps to reduce hardware complexity or improve compatibility. In the absence of conflict, embodiments in any node of this application and features in embodiments can be applied to any other node. In particular, the explanation of the terminology (Terminology), noun, function, and variable (if not specially stated) in this application can refer to the definition in the specification protocol TS38 series and TS37 series of 3GPP.

[0007] This application discloses a method used in a first node for wireless communication, characterized in that it comprises:

[0008] performing a first random access procedure;

[0009] setting a content of a first variable after the first random access procedure succeeds or fails, the first variable including at least one sub-variable;

[0010] wherein the performing the first random access procedure includes transmitting at least one random access preamble; the content of the first variable depends on at least a first one of SBFD symbols and non-SBFD symbols associated with random access resources used in the first random access procedure, the SBFD symbols being symbols with a first sub-band for SBFD operation, the first sub-band being located in a UL BWP.

[0011] As an embodiment, the random access resources include time-frequency resources.

[0012] As an embodiment, the random access resources include PRACH (Physical Random Access CHannel) occasions.

[0013] As an embodiment, the random access resources are the PRACH occasions.

[0014] As an embodiment, one PRACH occasion comprises one time-frequency resource block, each of the at least one random access preamble is transmitted in the one PRACH occasion.

[0015] As an embodiment, the random access resource comprises a PUSCH (Physical Uplink Shared Channel) resource associated with the PRACH occasion.

[0016] As an embodiment, the random access resource comprises the PRACH occasion and a PUSCH resource associated with the PRACH occasion.

[0017] As a sub-embodiment of the above two embodiments, the first random access procedure is a 2-step type initialized random access procedure.

[0018] As an embodiment, each of the at least one random access preamble is transmitted in one PRACH occasion, the one PRACH occasion is associated with one PUSCH resource, the one PUSCH resource is used for transmitting a MsgA (Message A) payload.

[0019] As an embodiment, one PRACH occasion comprises a plurality of symbols in time domain, one symbol of the plurality of symbols is a SBFD symbol, or is a non-SBFD (non-SBFD) symbol.

[0020] As an embodiment, one PRACH occasion comprises at least one SBFD symbol in the plurality of symbols in time domain.

[0021] As a sub-embodiment of the above embodiment, the plurality of symbols in time domain of the one PRACH occasion are all the SBFD symbols.

[0022] As a sub-embodiment of the above embodiment, the plurality of symbols in time domain of the one PRACH occasion comprises part of the SBFD symbols and the remaining part of the non-SBFD symbols.

[0023] As an embodiment, one PUSCH resource comprises at least one symbol in time domain.

[0024] As an embodiment, one PUSCH resource comprises at least one SBFD symbol in time domain.

[0025] As a sub-embodiment of the above-mentioned embodiment, the one PUSCH resource comprises the at least one symbol in time domain, and the at least one symbol comprises part of the SBFD symbols and the rest of the non-SBFD symbols; and the at least one symbol comprises a plurality of symbols.

[0026] As a sub-embodiment of the above-mentioned embodiment, the one PUSCH resource comprises the at least one symbol in time domain, and the at least one symbol comprises part of the SBFD symbols and the rest of the non-SBFD symbols; and the at least one symbol comprises a plurality of symbols.

[0027] As an embodiment, the SBFD operation is supported in the SBFD symbol.

[0028] As an embodiment, the SBFD operation is performed at a base station, or the SBFD operation is performed at the first node.

[0029] As an embodiment, the above-mentioned method can support the SBFD symbol to be applied to a random access procedure.

[0030] As an embodiment, the above-mentioned method can increase a random access resource, reduce a collision probability of a random access preamble, and further reduce a time of performing a random access procedure.

[0031] As an embodiment, a channel characteristic on the non-SBFD symbol is different from a channel characteristic on the SBFD symbol, and generally, an interference received on the SBFD symbol is much greater than an interference received on the non-SBFD symbol. The above-mentioned method records the first variable after the first random access procedure succeeds or fails, and obtains a parameter of performing a random access procedure, so as to facilitate system optimization.

[0032] According to an aspect of the present application, the above-mentioned method comprises the following features:

[0033] The content of setting the first variable comprises setting one sub-variable included in the first variable to indicate a time domain position of the SBFD symbol.

[0034] As an embodiment, the above-mentioned method records a parameter of the SBFD symbol associated with the random access resource used in the first random access procedure, so as to facilitate a network to optimize a time domain position of the SBFD symbol for a random access procedure.

[0035] According to an aspect of the present application, the above-mentioned method comprises the following features:

[0036] The content of setting the first variable comprises setting one sub-variable included in the first variable to indicate a frequency domain position and a bandwidth of the first sub-band.

[0037] As an embodiment, the method records the parameters of the first sub-band to facilitate the network to optimize the frequency domain location of the first sub-band for the random access procedure.

[0038] According to an aspect of the present application, the method features include:

[0039] The content of setting the first variable includes setting one sub-variable included in the first variable to indicate that the SBFD symbol only is included in the symbols occupied when each of the at least one random access preamble is sent.

[0040] As an embodiment, the method records the performance of the random access procedure performed using the PRACH opportunity including the SBFD symbol only to facilitate the network to optimize the parameter configuration of the random access procedure.

[0041] According to an aspect of the present application, the method features include:

[0042] The content of setting the first variable includes setting one sub-variable included in the first variable to indicate that at least one SBFD symbol is included in the symbols occupied when each of the at least one random access preamble is sent.

[0043] Wherein, at least two symbols are occupied when each of the at least one random access preamble is sent.

[0044] As an embodiment, the method records the performance of the random access procedure performed using the PRACH opportunity including the SBFD symbol to facilitate the network to optimize the parameter configuration of the random access procedure.

[0045] According to an aspect of the present application, the method features include:

[0046] The content of setting the first variable includes setting one sub-variable included in the first variable to indicate that at least one SBFD symbol is included in the symbols occupied when Q1 random access preambles included in the at least one random access preamble are sent.

[0047] Wherein, the Q1 is equal to 0, or is a positive integer greater than 0.

[0048] As an embodiment, the method records the number of times of using the PRACH opportunity including the SBFD symbol to facilitate the network to optimize the parameter configuration of the random access procedure.

[0049] According to an aspect of the present application, the method features include:

[0050] The content of the first variable includes that a sub-variable included in the first variable indicates that at least one SBFD symbol is included in symbols occupied when the first Q2 random access preambles included in the at least one random access preamble are sent, and only the non-SBFD symbol is included in symbols occupied when the last Q3 random access preambles included in the at least one random access preamble are sent.

[0051] Wherein, the Q2 and the Q3 are positive integers greater than 0 respectively; the at least one random access preamble includes at least 2 random access preambles.

[0052] As an embodiment, the above method records the fallback from the PRACH opportunity including the SBFD symbol to the PRACH opportunity including only the non-SBFD symbol, so as to facilitate the network to optimize the parameter configuration of the random access process.

[0053] According to an aspect of the present application, the above method is characterized in that:

[0054] receiving a first RRC message, the first RRC message requesting user information reporting;

[0055] sending a second RRC message, the second RRC message being a response to the first RRC message;

[0056] when the second RRC message is successfully sent, discarding the content of the first variable;

[0057] Wherein, the content of the first variable is included in the second RRC message.

[0058] As an embodiment, the first node of the above method uploads the recorded content of the first variable to the base station, so that the base station can obtain the parameters of the random access process to optimize the system configuration.

[0059] According to an aspect of the present application, the above method is characterized in that:

[0060] receiving a third RRC message, the third RRC message configuring a target PRACH opportunity set, the target PRACH opportunity set including a plurality of PRACH opportunities;

[0061] The random access resource used in the first random access procedure includes at least one PRACH opportunity, and the at least one PRACH opportunity belongs to the target PRACH opportunity set; and part of the PRACH opportunities in the target PRACH opportunity set include only the non-SBFD symbol in the time domain, and the remaining PRACH opportunities in the target PRACH opportunity set include at least one SBFD symbol in the time domain.

[0062] As an embodiment, the candidate of the random resource used in the first random access procedure includes a PRACH opportunity in the target PRACH opportunity set.

[0063] As an embodiment, the above method can effectively support the scenario that the traditional PRACH opportunity including only the uplink symbol and the PRACH opportunity including the SBFD symbol are applied to the same random access procedure.

[0064] As an embodiment, the above method adopts the mixed PRACH opportunity in the same random access procedure, which can simplify the UE or terminal implementation.

[0065] As an embodiment, the above method can increase the random access resource, reduce the collision probability of the random access preamble, and further reduce the time of performing the random access procedure

[0066] According to an aspect of the present application, the features of the above method include:

[0067] The first node is an SBFD-aware node.

[0068] As an embodiment, the SBFD-aware node supports the SBFD operation.

[0069] According to an aspect of the present application, the features of the above method include:

[0070] The at least one random access preamble belongs to a target random access preamble group, and the target random access preamble group is only available for an SBFD-aware node;

[0071] The random access resource used in the first random access procedure is associated with the SBFD symbol and the non-SBFD symbol.

[0072] As an embodiment, the above method can let the base station know in advance that the UE is SBFD-aware through the target random access preamble group, so that the base station can determine that the next transmission can be scheduled in the SBFD symbol, the transmission resource of the SBFD-aware UE can be adjusted, and the random access procedure delay can be reduced.

[0073] A terminal is disclosed, and has characteristics that

[0074] The terminal comprises one or more processors and a memory;

[0075] The memory is coupled with the one or more processors, and the memory is configured to store computer program codes including computer instructions, and the one or more processors are configured to invoke the computer instructions to cause the terminal to perform the above method in the first node. BRIEF DESCRIPTION OF DRAWINGS

[0076] Other characteristics, objectives, and advantages of the present application will become more apparent after reading the detailed description of non-limiting embodiments thereof, made with reference to the following drawings:

[0077] Fig. 1 illustrates a signal processing flowchart in a first node according to one embodiment of the present application;

[0078] Fig. 2 illustrates a schematic diagram of a network architecture according to one embodiment of the present application;

[0079] Fig. 3 illustrates a schematic diagram of a radio protocol architecture for the user and control planes according to one embodiment of the present application;

[0080] Fig. 4 illustrates a schematic diagram of hardware modules of a communication device according to one embodiment of the present application;

[0081] Fig. 5 illustrates a wireless signal transmission flowchart according to one embodiment of the present application;

[0082] Fig. 6 illustrates a schematic diagram of time domain locations of SBFD symbols according to one embodiment of the present application;

[0083] Fig. 7 illustrates a schematic diagram of a relationship between SBFD symbols and first subbands according to one embodiment of the present application;

[0084] Fig. 8 illustrates a schematic diagram of a PRACH opportunity and at least one random access preamble according to one embodiment of the present application;

[0085] Fig. 9 illustrates a schematic diagram of a PRACH opportunity and at least one random access preamble according to one embodiment of the present application;

[0086] Fig. 10 illustrates a schematic diagram of a PRACH opportunity and at least one random access preamble according to one embodiment of the present application;

[0087] Fig. 11 illustrates a schematic diagram of a PRACH opportunity and at least one random access preamble according to one embodiment of the present application;

[0088] FIG. 12 illustrates a diagram of symbols included in time domain by a target PRACH opportunity set according to an embodiment of the present application;

[0089] FIG. 13 illustrates a structural block diagram of a processing device in a first node according to an embodiment of the present application. DETAILED DESCRIPTION

[0090] The technical solutions of the present application will be further described in detail below with reference to the accompanying drawings. It should be noted that the embodiments of the present application and the features in the embodiments can be arbitrarily combined without conflict.

[0091] Embodiment 1

[0092] Embodiment 1 illustrates a signal processing flowchart in a first node according to an embodiment of the present application, as shown in FIG. 1.

[0093] In embodiment 1, the first node 100 performs a first random access procedure in step 101; in step 102, the first random access procedure is successful, or, after failure, sets the content of a first variable for the first random access procedure, the first variable including at least one sub-variable; wherein the execution of the first random access procedure includes sending at least one random access preamble; the content of the first variable depends on at least the former of the SBFD symbol and the non-SBFD symbol associated with the random access resource used in the first random access procedure, the SBFD symbol being a symbol with a first sub-band for SBFD operation, the first sub-band being located in the UL BWP.

[0094] As an embodiment, the first random access procedure is performed.

[0095] As an embodiment, the first random access procedure is triggered by the network.

[0096] As a sub-embodiment of the above-mentioned embodiment, the first node receives a PDCCH (Physical Downlink Control Channel) order indicating a random access resource for the first random access procedure.

[0097] As an embodiment, the first random access procedure is triggered by an event.

[0098] As a sub-embodiment of the above-mentioned embodiment, the event includes initial access from RRC (Radio Resource Control) IDLE.

[0099] As one sub-example of the above embodiment, the event comprises a RRC connection re-establishment procedure.

[0100] As one sub-example of the above embodiment, the event comprises a SR (Scheduling Request) failure.

[0101] As one sub-example of the above embodiment, the event comprises a beam failure recovery.

[0102] As one embodiment, the first random access procedure is a 4-step type initialized random access procedure.

[0103] As one embodiment, the first random access procedure is a 2-step type initialized random access procedure.

[0104] As one embodiment, the performing the first random access procedure comprises transmitting at least one random access preamble.

[0105] As one embodiment, any of the at least one random access preamble is transmitted in one PRACH occasion.

[0106] As one embodiment, any two of the at least one random access preamble are different; wherein the at least one random access preamble comprises at least two random access preambles.

[0107] As one embodiment, at least two of the at least one random access preamble are the same; wherein the at least one random access preamble comprises at least two random access preambles.

[0108] As one embodiment, each of the at least one random access preamble is randomly selected by the first node.

[0109] As one embodiment, each of the at least one random access preamble is indicated by a network.

[0110] As one embodiment, each of the at least one random access preamble is a signature sequence.

[0111] As one embodiment, each of the at least one random access preamble is a Gold sequence.

[0112] As one embodiment, each of the at least one random access preamble is a M-sequence.

[0113] As one embodiment, each of the at least one random access preamble is a ZC (Zadoff-Chu) sequence.

[0114] As one embodiment, sending one random access preamble is sending one time of random access preamble.

[0115] As one embodiment, the number of random access preambles included in the at least one random access preamble is no more than a threshold, the threshold is a maximum number of times of sending random access preambles configured in the first random access procedure.

[0116] As one embodiment, the first random access preamble in the at least one random access preamble is the first message sent by the performing the first random access procedure.

[0117] As one embodiment, the sending of the other random access preambles in the at least one random access preamble except the first random access preamble is triggered by the first random access procedure being not completed.

[0118] As one embodiment, the performing the first random access procedure includes sending one random access preamble, starting a random access response window after the sending of the one random access preamble, monitoring a random access response while the random access response window is running, sending a Msg3 (message 3) in an uplink grant indicated in the random access response if a random access response for the first node is monitored, and starting a random access contention resolution timer, considering the first random access procedure not completed if the random access response window expires and a random access response for the first node is not monitored, reselecting one random access preamble for sending when the number of times of sending random access preambles is less than a first preset threshold, otherwise, considering the first random access procedure failed, monitoring a UE contention resolution identity while the random access contention resolution timer is running, considering the first random access procedure successful if a UE contention resolution identity for the first node is monitored, considering the first random access procedure not completed if the random access contention resolution timer expires and a UE contention resolution identity for the first node is not monitored, reselecting one random access preamble for sending when the number of times of sending random access preambles is less than the first threshold,

[0119] otherwise, considering the first random access procedure failed; the first random access procedure is a 4-step random access procedure.

[0120] As an embodiment, the performing the first random access procedure comprises sending a MsgA (message A) comprising a random access preamble and an associated PUSCH, starting a MsgB (message B) response window after the sending of the MsgA, monitoring MsgB while the MsgB response window is running, considering the first random access procedure successful if a MsgB for the first node is monitored, considering the first random access procedure not completed if the MsgB response window expires and no MsgB for the first node is monitored, falling back to a 4-step random access procedure and reselecting a random access preamble for sending when a number of sending of random access preambles reaches a preset second threshold, the performing of the 4-step random access procedure can refer to the above-mentioned embodiments and will not be repeated here, wherein the second threshold is smaller than the first threshold.

[0121] As an embodiment, the performing the first random access procedure comprises sending a MsgA, the MsgA comprising a random access preamble and an associated PUSCH, starting a MsgB response window after the sending of the MsgA, monitoring MsgB while the MsgB response window is running, considering the first random access procedure successful if a MsgB for the first node is monitored, considering the first random access procedure not completed if the MsgB response window expires and no MsgB for the first node is monitored, re-sending the MsgA comprising a reselected random access preamble when a number of sending of random access preambles is smaller than a preset third threshold, otherwise, considering the first random access procedure failed, the first random access procedure being a 2-step random access procedure.

[0122] As an embodiment, the first random access procedure is successful, or, after being failed, setting a content of a first variable for the first random access procedure.

[0123] As an embodiment, the first random access procedure being failed is that the first random access procedure is not completed and a maximum number of sending of configured random access preambles is reached.

[0124] As an embodiment, no random access procedure other than the first random access procedure is performed in a same MAC (Medium Access Control) entity before the setting of the content of the first variable.

[0125] As an embodiment, the first variable comprises at least one sub-variable.

[0126] As an embodiment, the content of setting the first variable for the first random access procedure includes content of setting at least one sub-variable included in the first variable for the first random access procedure.

[0127] As an embodiment, the content of setting the first variable for the first random access procedure includes content of storing the first variable for the first random access procedure.

[0128] As an embodiment, the first variable is ra-ReportList.

[0129] As an embodiment, the first variable is ra-Report.

[0130] As an embodiment, the first variable is ra-InformationCommon.

[0131] As an embodiment, one sub-variable included in the first variable is msg1-FrequencyStart.

[0132] As an embodiment, one sub-variable included in the first variable is msg1-FrequencyStartCFRA.

[0133] As an embodiment, one sub-variable included in the first variable is msg1-SubcarrierSpacing.

[0134] As an embodiment, one sub-variable included in the first variable is msg1-SubcarrierSpacingCFRA.

[0135] As an embodiment, one sub-variable included in the first variable is msg1-FDM.

[0136] As an embodiment, one sub-variable included in the first variable is msg1-FDMCFRA.

[0137] As an embodiment, one sub-variable included in the first variable is perRAInfoList.

[0138] As one embodiment, the content of the first variable depends on at least the former of both SBFD symbols and non-SBFD symbols associated with random access resources used in the first random access procedure.

[0139] As one embodiment, the content of the first variable depends on at least the former of both SBFD symbols and non-SBFD symbols associated with random access resources used in the first random access procedure is that the content of the first variable is set according to at least the former of both the SBFD symbols and the non-SBFD symbols associated with the random access resources used in the first random access procedure.

[0140] As one embodiment, the content of the first variable depends on at least the former of both SBFD symbols and non-SBFD symbols associated with random access resources used in the first random access procedure is that the content of the first variable is set according to at least the former of both the SBFD symbols and the non-SBFD symbols associated with the random access resources used in the first random access procedure.

[0141] As one embodiment, the content of the first variable depends on at least the former of both SBFD symbols and non-SBFD symbols associated with random access resources used in the first random access procedure is that the content of the first variable is set according to at least the former of both the SBFD symbols and the non-SBFD symbols associated with the random access resources used in the first random access procedure.

[0142] As one embodiment, the content of the first variable depends on at least the former of both SBFD symbols and non-SBFD symbols associated with random access resources used in the first random access procedure is that the content of the first variable is set according to at least the former of both the SBFD symbols and the non-SBFD symbols associated with the random access resources used in the first random access procedure.

[0143] As one embodiment, the random access resources include at least one of both a PRACH occasion and a PUSCH resource associated with the PRACH occasion.

[0144] As one embodiment, the content of the first variable depends on at least the former of both SBFD symbols and non-SBFD symbols associated with random access resources used in the first random access procedure is that the content of the first variable is set according to at least the former of both the SBFD symbols and the non-SBFD symbols associated with the random access resources used in the first random access procedure.

[0145] As one embodiment, one PRACH occasion is used to transmit one random access preamble.

[0146] As one embodiment, one PRACH occasion and a PUSCH resource associated with the one PRACH occasion are used to transmit one MsgA, the one MsgA including one random access preamble and one MsgA payload.

[0147] As one embodiment, the random access resources are cell-specifically configured.

[0148] As one embodiment, the random access resource is UE-specifically configured.

[0149] As one embodiment, the PRACH occasion (PRACH transmission occasion) and RO (RACH occasion) are interchangeably used in this application, unless otherwise specified.

[0150] As one embodiment, the random access resource used in the first random access procedure is self-selected by the first node from network configured random access resources.

[0151] As one embodiment, the random access resource used in the first random access procedure is associated with at least the former of the SBFD symbol and the non-SBFD symbol includes: the first random access procedure respectively transmits the at least one random access preamble in at least one PRACH occasion, each PRACH occasion in the at least one PRACH occasion includes at least the former of the SBFD symbol and the non-SBFD symbol in the time domain.

[0152] As one sub-embodiment of the above-mentioned embodiment, the random access resource is actually used in the first random access procedure.

[0153] As one sub-embodiment of the above-mentioned embodiment, the random access resource is only located in the SBFD symbol in the time domain.

[0154] As one sub-embodiment of the above-mentioned embodiment, the random access resource is located in the SBFD symbol and the non-SBFD symbol in the time domain.

[0155] As one embodiment, the random access resource used in the first random access procedure is associated with at least the former of the SBFD symbol and the non-SBFD symbol includes: the first random access procedure respectively transmits the at least one random access preamble in at least one PRACH occasion, the at least one PRACH occasion belongs to a target PRACH occasion set, each PRACH occasion included in the target PRACH occasion set includes at least one SBFD symbol in the time domain, or, part of the PRACH occasions in the target PRACH occasion set include only the non-SBFD symbol in the time domain, and the remaining part of the PRACH occasions in the target PRACH occasion set include at least one SBFD symbol in the time domain.

[0156] As one sub-example of the above embodiment, the random access resource can be selected to be used in the first random access procedure.

[0157] As one sub-example of the above embodiment, the random access resource is located in time domain in only the SBFD symbol.

[0158] As one sub-example of the above embodiment, the random access resource is located in time domain in the SBFD symbol and the non-SBFD symbol.

[0159] As one sub-example of the above embodiment, the random access resource is located in time domain in only the non-SBFD symbol.

[0160] As one embodiment, the SBFD symbol is a symbol with a first sub-band for SBFD operation.

[0161] As one embodiment, the SBFD symbol includes the first sub-band used for the SBFD operation.

[0162] As one embodiment, the SBFD operation is performed on one carrier.

[0163] As one embodiment, the transmission direction on the SBFD symbol includes uplink and downlink.

[0164] As one embodiment, the SBFD operation is performed at a UE.

[0165] As one sub-example of the above embodiment, the UE supports uplink transmission and downlink reception simultaneously in one symbol.

[0166] As one embodiment, the SBFD operation is performed at a base station.

[0167] As one sub-example of the above embodiment, the base station supports downlink transmission and uplink reception simultaneously in one symbol.

[0168] As one embodiment, in a TDD (Time Division Duplex) system, when the SBFD operation is not performed at a base station, the base station transmits downlink signals in a DL (Downlink) symbol and receives uplink signals in a UL (Uplink) symbol; when the SBFD operation is performed at the base station, the base station receives uplink signals and transmits downlink signals simultaneously in a SBFD symbol.

[0169] As one embodiment, the non-SBFD symbol is a symbol without a sub-band for SBFD operation.

[0170] As an embodiment, the transmission direction on the non-SBFD symbol is unique, i.e., either uplink or downlink.

[0171] As an embodiment, the non-SBFD symbol is an uplink symbol.

[0172] As an embodiment, the uplink symbol is used for uplink transmission only.

[0173] As an embodiment, the first sub-band includes multiple RBs (resource blocks) contiguous in frequency domain.

[0174] As an embodiment, the first sub-band is located in a UL BWP.

[0175] As an embodiment, the parameters of the first sub-band are the same as those of the UL BWP.

[0176] As an embodiment, the parameters of the first sub-band are at least partially different from those of the UL BWP.

[0177] As an embodiment, the parameters include subcarrier spacing (subcarrierSpacing).

[0178] As an embodiment, the parameters include cyclic prefix (cyclicPrefix).

[0179] As an embodiment, the network configures the frequency domain location of the first sub-band.

[0180] As an embodiment, the frequency domain location includes a frequency domain start location and a bandwidth.

[0181] As an embodiment, the frequency domain location includes a frequency domain start location and a frequency domain end location.

[0182] As an embodiment, the bandwidth of the first sub-band is smaller than that of the UL BWP.

[0183] As an embodiment, the UL BWP is an active UL BWP.

[0184] As an embodiment, the UL BWP is an initial UL BWP.

[0185] As an embodiment, the UL BWP is a default UL BWP.

[0186] As an embodiment, the SBFD symbol, or the non-SBFD symbol, is a multicarrier symbol.

[0187] As one embodiment, the SBFD symbol, or the non-SBFD symbol, is an OFDM (Orthogonal Frequency Division Multiplexing) symbol.

[0188] As one embodiment, the SBFD symbol, or the non-SBFD symbol, is a single carrier symbol.

[0189] As one embodiment, the SBFD symbol, or the non-SBFD symbol, is a DFT (Discrete Fourier Transform)-S (Spread)-OFDM symbol.

[0190] As one embodiment, the SBFD symbol, or the non-SBFD symbol, is a SC (single carrier)-FDMA (frequency-division multiple access) symbol.

[0191] Embodiment 2

[0192] Embodiment 2 illustrates a network architecture diagram according to one embodiment of the present application, as shown in FIG. 2. FIG. 2 illustrates a diagram of a network architecture 200 for NR 5G, LTE (Long-Term Evolution) and LTE-A (Long-Term Evolution Advanced) systems. The NR 5G, LTE or LTE-A network architecture 200 can be referred to as a 5GS (5G System)

[0193] / EPS (Evolved Packet System) 200 or some other suitable terminology. The 5GS / EPS 200 can include one or more UEs (User Equipment) 201, NG-RAN (Next Generation - Radio Access Network) 202, 5GC (5G Core Network) / EPC (Evolved Packet Core) 210, HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and Internet services 230. The 5GS / EPS can interconnect with other access networks, but these entities / interfaces are not shown for simplicity. As illustrated, the 5GS / EPS provides packet-switched services, however, those skilled in the art will readily appreciate that the various concepts presented throughout this application can be extended to networks providing circuit-switched services or other cellular networks. The NG-RAN includes an NR Node-B (gNB) 203 and other gNBs 204. The gNB 203 provides user and control plane protocol terminations toward the UE 201. The gNB 203 can be connected to the other gNBs 204 via an Xn interface (e.g., backhaul). The gNB 203 can also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), a TRP (Transmission Reception Point), or some other suitable terminology in an NTN (Non Terrestrial Network, satellite network) network, the gNB 203 can be a satellite, an aircraft, or a ground base station relayed through a satellite. The gNB 203 provides wireless access to the 5GC / EPC 210 for the UEs 201. Examples of UEs 201 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., 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, an automotive device, an automotive communication unit, a wearable device, or any other similar functional device.A UE 201 can also be referred to 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. A gNB 203 is connected to a 5GC / EPC 210 through an S1 / NG interface. The 5GC / EPC 210 includes a MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMF 214, a S-GW (Service Gateway) / UPF (User Plane Function) 212, and a P-GW (Packet Date Network Gateway) / UPF 213. The MME / AMF / SMF 211 is a 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 IP (Internet Protocol) packets are transferred through the S-GW / UPF 212, which itself is connected to the P-GW / UPF 213. The P-GW provides UE IP address allocation as well as other functions. The P-GW / UPF 213 is connected to Internet services 230. The Internet services 230 include operator corresponding Internet protocol services, which can specifically include the Internet, an intranet, an IMS (IP Multimedia Subsystem), and a PS (Packet Switching) streaming service.

[0194] As one embodiment, the UE 201 corresponds to a first node in the present application.

[0195] As one embodiment, the NR NodeB 203 corresponds to a second node in the present application.

[0196] As one embodiment, the UE 201 supports SBFD operation.

[0197] As one embodiment, the gNB 203 supports SBFD operation.

[0198] As one embodiment, the gNB 203 is a macro cell base station.

[0199] As one embodiment, the gNB 203 is a Micro Cell base station.

[0200] As one embodiment, the gNB 203 is a Pico Cell base station.

[0201] As one embodiment, the gNB 203 is a Femto Cell base station.

[0202] As one embodiment, the gNB 203 is a base station device supporting large latency difference.

[0203] As one embodiment, the gNB 203 is a flying platform device.

[0204] As one embodiment, the gNB 203 is a satellite device.

[0205] As one embodiment, the gNB 203 is a test device (e.g. a transceiver simulating part of the functionality of a base station, a signaling tester).

[0206] As one embodiment, the wireless link from the UE 201 to the gNB 203 is an uplink, which is used to perform uplink transmission.

[0207] As one embodiment, the wireless link from the gNB 203 to the UE 201 is a downlink, which is used to perform downlink transmission.

[0208] As one embodiment, the UE 201 and the gNB 203 are connected through a Uu interface respectively.

[0209] Embodiment 3

[0210] Embodiment 3 illustrates a diagram of a radio protocol architecture for the user and control planes according to an embodiment of the application, as shown in FIG. 3. FIG. 3 is a diagram illustrating an embodiment of a radio protocol architecture for the user plane 350 and control plane 300, which exhibits the radio protocol architecture for the control plane 300 of the UE and gNB in three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (LI layer) is the lowest layer and implements various PHY (Physical layer) signal processing functions. The LI layer will be referred to in this document as the PHY 301. Layer 2 (L2 layer) 305 is above the PHY 301 and is responsible for the link between the UE and gNB by means of the PHY 301. The L2 layer 305 includes a MAC (Medium Access Control) sublayer 302, a RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304, which are terminated at the gNB on the network side. The PDCP sublayer 304 provides data ciphering and integrity protection, and also handles handover between gNBs for UEs. The RLC sublayer 303 provides segmentation and reassembly of data packets, retransmission of lost data packets through ARQ, and also provides duplicate data packet detection and protocol error detection. The MAC sublayer 302 provides mapping between logical and transport channels and multiplexing of logical channel identities. The MAC sublayer 302 is also responsible for allocating the various radio resources (e.g., resource blocks) within one cell among the UEs. The MAC sublayer 302 is also responsible for HARQ (Hybrid Automatic Repeat Request) operations. The RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3 layer) in the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the gNB and the UE. The radio protocol architecture for the user plane 350 includes Layer 1 (LI layer) and Layer 2 (L2 layer), which are substantially the same as the corresponding layers and sublayers in the control plane 300 for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead.The L2 layer 355 in the user plane 350 also includes a SDAP (Service Data Adaptation Protocol) sublayer 356, which is responsible for the mapping between QoS (Quality of Service) flows and data radio bearers (DRBs) to support the diversity of services. The radio protocol architecture in the user plane 350 for a UE can include the portions of the protocol sublayers or all of the protocol sublayers of the SDAP sublayer 356, the PDCP sublayer 354, the RLC sublayer 353, and the MAC sublayer 352 at the L2 layer. Although not shown, the UE can also have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) that is terminated at the P-GW on the network side and an application layer that is terminated at the other end of the connection (e.g., a far end UE, a server, etc.).

[0211] As one embodiment, the wireless protocol architecture in FIG. 3 is applicable to the first node in the present application.

[0212] As one embodiment, the wireless protocol architecture in FIG. 3 is applicable to the second node in the present application.

[0213] As one embodiment, the at least one random access preamble in the present application is generated at the PHY 301 or the PHY 351.

[0214] As one embodiment, the first variable in the present application is generated at the RRC 306.

[0215] As one embodiment, the second variable in the present application is generated at the RRC 306.

[0216] As one embodiment, the first RRC message in the present application is generated at the RRC 306.

[0217] As one embodiment, the second RRC message in the present application is generated at the RRC 306.

[0218] As one embodiment, the third RRC message in the present application is generated at the RRC 306.

[0219] As one embodiment, the L2 layer 305 or 355 belongs to a higher layer.

[0220] As one embodiment, the RRC sublayer 306 in the L3 layer belongs to a higher layer.

[0221] Embodiment 4

[0222] Example 4 illustrates a hardware module diagram of a communication device in accordance with one embodiment of the application, as shown in FIG. 4. FIG. 4 is a block diagram of a first communication device 450 and a second communication device 410 in communication with each other in an access network.

[0223] The first communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmit processor 468, a receive processor 456, a multiple antenna transmit processor 457, a multiple antenna receive processor 458, a transmitter / receiver 454, and an antenna 452.

[0224] The second communication device 410 includes a controller / processor 475, a memory 476, a data source 477, a receive processor 470, a transmit processor 416, a multiple antenna receive processor 472, a multiple antenna transmit processor 471, a transmitter / receiver 418, and an antenna 420.

[0225] In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper layer packets from a core network or upper layer packets from a data source 477 are provided to a controller / processor 475. The core network and the data source 477 represent all protocol layers above the L2 layer. The controller / processor 475 implements the functionality of the L2 layer. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 475 provides header compression, ciphering, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocations for the first communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmission of lost packets, and signaling to the first communication device 450. Transmit processor 416 and multiple antenna transmit processor 471 implement various signal processing functions for the LI layer (i.e., physical layer). The transmit processor 416 implements coding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, and mapping of coded bits to 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), M-quadrature amplitude modulation (M-QAM)). The multiple antenna transmit processor 471 performs digital spatial pre-coding of the coded and modulated symbols, including codebook-based and non-codebook-based pre-coding, and beamforming processing, generating one or more spatial streams. The transmit processor 416 then maps to each spatial stream to a subcarrier, multiplexes the stream with reference signals (e.g., pilot) in the time and / or frequency domain, and then performs an inverse fast Fourier transform (IFFT) to generate a time-domain multicarrier symbol stream for the physical channel. The multiple antenna transmit processor 471 then performs transmit analog pre-coding / beamforming operations on the time-domain multicarrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multiple antenna transmit processor 471 into a radio frequency stream, and then provides the radio frequency stream to a different antenna 420.

[0226] In transmissions from the second communication device 410 to the first communication device 450, at the first communication device 450, each receiver 454 receives a signal through its respective antenna 452. Each receiver 454 recovers information modulated onto an RF carrier and provides the recovered information at baseband as a stream of symbols to a receive processor 456. The receive processor 456 and a multiple access receiver processor 458 implement various signal processing functions of the Ll layer. The multiple access receiver processor 458 performs receive analog precoding / beamforming operations on the baseband multiple access symbol streams from the receivers 454. The receive processor 456 converts the baseband multiple access symbol streams from the time-domain to the frequency domain using a Fast Fourier Transform (FFT). In the frequency domain, the physical layer data signals and the reference signals are demultiplexed from the received symbol streams, with the reference signals to be used for channel estimation and the data signals to be recovered after multiple access detection in the multiple access receiver processor 458 for any spatial streams destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered by the receive processor 456 and used to generate soft decisions. The receive processor 456 then decodes and de-interleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communication device 410 on the physical channel. The upper layer data and control signals are then provided to a controller / processor 459. The controller / processor 459 implements the functions of the L2 layer. The controller / processor 459 can be associated with a memory 460 that stores program codes and data. The memory 460 can be referred to as a computer-readable medium. In transmissions from the second communication device 410 to the first communication device 450, the controller / processor 459 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer data packets from the second communication device 410. The upper layer data packets are then provided to all protocol layers above the L2 layer. Various control signals can also be provided to the L3 for L3 processing.

[0227] In the transmission from the first communication device 450 to the second communication device 410, at the first communication device 450, a data source 467 provides upper layer data packets to a controller / processor 459 using the data source 467. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmit function at the second communication device 410 described in the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 implements header compression, ciphering, packet segmentation and reordering, and multiplexing between logical and transport channels, L2 layer functionality for the user plane and control plane. The controller / processor 459 is also responsible for retransmission of lost packets, and signaling to the second communication device 410. Transmit processor 468 performs modulation mapping, channel coding processing, multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing, and then transmit processor 468 modulates the generated spatial streams into multi-carrier / single-carrier symbol streams, which are further processed by analog precoding / beamforming operations in multi-antenna transmit processor 457 and then provided to different antennas 452 via transmitters 454. Each transmitter 454 first converts the baseband symbol stream provided by multi-antenna transmit processor 457 into a radio frequency signal, and then provides the radio frequency signal to antenna 452.

[0228] In the transmission from the first communication device 450 to the second communication device 410, the functions at the second communication device 410 are similar to the receive functions at the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives a radio frequency signal through its respective antenna 420, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to multi-antenna receive processor 472 and receive processor 470. Receive processor 470 and multi-antenna receive processor 472 together implement the functionality of the L1 layer. Controller / processor 475 implements the functionality of the L2 layer. Controller / processor 475 can be associated with a memory 476 that stores program codes and data. The memory 476 can be referred to as a computer readable medium. In the transmission from the first communication device 450 to the second communication device 410, controller / processor 475 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer data packets from the first communication device 450. Upper layer data packets from controller / processor 475 can be provided to the core network or all protocol layers above the L2 layer, and various control signals can be provided to the core network or L3 for L3 processing.

[0229] As one embodiment, the first communication device 450 apparatus comprises at least one processor and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the first communication device 450 apparatus at least to perform a first random access procedure, set a content of a first variable comprising at least one sub-variable upon success of the first random access procedure or upon failure of the first random access procedure, wherein the performing the first random access procedure comprises transmitting at least one random access preamble, and wherein the content of the first variable depends on at least a first one of both a SBFD symbol and a non-SBFD symbol associated with a random access resource used in the first random access procedure, the SBFD symbol being a symbol with a first sub-band for SBFD operation, the first sub-band being located in a UL BWP.

[0230] As one embodiment, the first communication device 450 apparatus comprises a memory storing a program of computer readable instructions to produce actions when executed by at least one processor, the actions comprising performing a first random access procedure, setting a content of a first variable comprising at least one sub-variable upon success of the first random access procedure or upon failure of the first random access procedure, wherein the performing the first random access procedure comprises transmitting at least one random access preamble, and wherein the content of the first variable depends on at least a first one of both a SBFD symbol and a non-SBFD symbol associated with a random access resource used in the first random access procedure, the SBFD symbol being a symbol with a first sub-band for SBFD operation, the first sub-band being located in a UL BWP.

[0231] As one embodiment, the second communication device 410 apparatus comprises at least one processor and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the second communication device 410 apparatus at least to receive at least one random access preamble, transmit a first RRC message, receive a second RRC message, transmit a third RRC message.

[0232] As one embodiment, the second communication device 410 apparatus comprises a memory storing a program of computer readable instructions to produce actions when executed by at least one processor, the actions comprising receiving at least one random access preamble, transmitting a first RRC message, receiving a second RRC message, transmitting a third RRC message.

[0233] As one embodiment, the first communication device 450 corresponds to the first node in the present application.

[0234] As one embodiment, the second communication device 410 corresponds to a second node in the present application.

[0235] As one embodiment, the first communication device 450 is a UE.

[0236] As one embodiment, the first communication device 450 is a terminal.

[0237] As one embodiment, the first communication device 450 is a relay.

[0238] As one embodiment, the second communication device 410 is a base station device.

[0239] As one embodiment, the second communication device 410 is a distributed unit of a base station.

[0240] As one embodiment, the second communication device 410 is a piece of code in a distributed unit of a base station.

[0241] As one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmission processor 457, the transmission processor 468 or the controller / processor 459 is used to transmit at least one random access preamble in the present application.

[0242] As one embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna reception processor 472, the reception processor 470 or the controller / processor 475 is used to receive at least one random access preamble in the present application.

[0243] As one embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmission processor 471, the transmission processor 416 or the controller / processor 475 is used to transmit a first RRC message in the present application.

[0244] As one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456 or the controller / processor 459 is used to receive a first RRC message in the present application.

[0245] As one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmission processor 457, the transmission processor 468 or the controller / processor 459 is used to transmit a second RRC message in the present application.

[0246] As an embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna reception processor 472, the reception processor 470, or the controller / processor 475 is configured to receive the second RRC message in the present application.

[0247] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmission processor 471, the transmission processor 416, or the controller / processor 475 is configured to transmit the third RRC message in the present application.

[0248] As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456, or the controller / processor 459 is configured to receive the third RRC message in the present application.

[0249] Embodiment 5

[0250] Embodiment 5 illustrates a flow chart of wireless signal transmission according to an embodiment of the present application, as shown in FIG. 5. In FIG. 5, a first node N51 and a second node N52 communicate through a wireless interface. It is to be noted that the sequence in this example does not limit the sequence of signal transmission and implementation in the present application.

[0251] For the first node N51, the third RRC message is received in step S511; the first random access procedure is performed in step S512; the content of the first variable is set after the first random access procedure is successful or failed in step S513; the first RRC message is received in step S514; the second RRC message is transmitted in step S515; the content of the first variable is discarded after the second RRC message is successfully transmitted in step S516.

[0252] For the second node N52, the third RRC message is transmitted in step S521; the first RRC message is transmitted in step S522; the second RRC message is received in step S523.

[0253] It is to be noted that although not shown in FIG. 5, performing the first random access procedure includes that the first node N51 transmits the at least one random access preamble, and the second node N52 receives the at least one random access preamble.

[0254] In embodiment 5, a first random access procedure is performed; the first random access procedure is successful, or, after failure, a first variable is set, the first variable including at least one sub-variable; wherein the performing the first random access procedure includes sending at least one random access preamble; the content of the first variable depends on at least the former of both SBFD symbols and non-SBFD symbols associated with random access resources used in the first random access procedure, the SBFD symbol being a symbol with a first sub-band for SBFD operation, the first sub-band being located in a UL BWP; a first RRC message is received, the first RRC message requesting user information reporting; a second RRC message is sent, the second RRC message being a response to the first RRC message; when the second RRC message is successfully sent, the content of the first variable is discarded; wherein the second RRC message includes the content of the first variable; a third RRC message is received, the third RRC message configuring a target PRACH opportunity set, the target PRACH opportunity set including a plurality of PRACH opportunities; wherein the random access resources used in the first random access procedure include at least one PRACH opportunity, the at least one PRACH opportunity belonging to the target PRACH opportunity set; part of the PRACH opportunities in the target PRACH opportunity set include only the non-SBFD symbols in the time domain, and the remaining part of the PRACH opportunities in the target PRACH opportunity set include at least one SBFD symbol in the time domain; the first node is an SBFD-aware node; the at least one random access preamble belongs to a target random access preamble group, the target random access preamble group being available only for SBFD-aware nodes; wherein the random access resources used in the first random access procedure are associated with the SBFD symbol and the non-SBFD symbol.

[0255] As an embodiment, the second node is a base station.

[0256] As an embodiment, the second node N52 is a maintenance base station of a serving cell of the first node N51.

[0257] As an embodiment, the second node N52 is a maintenance base station of a master cell group (MCG) of the first node N51, i.e., MgNB (main gNB).

[0258] As an embodiment, the second node N52 is a maintenance base station of a secondary cell group (SCG) of the first node N51, i.e., SgNB (secondary gNB).

[0259] As one embodiment, the second node N52 is a Transmit / Receive Point (TRP) of a serving cell of the first node N51.

[0260] As one embodiment, the first node N51 is a terminal.

[0261] As one embodiment, the first node N51 is a UE.

[0262] As one embodiment, the first node N51 is a SBFD-aware node.

[0263] As one embodiment, the first node N51 supports SBFD operation.

[0264] As one sub-embodiment of the above two embodiments, the SBFD operation is performed at the second node N52, or the SBFD operation is performed at the first node N51.

[0265] As one embodiment, a third RRC message is received.

[0266] As one embodiment, the third RRC message configures a target random access resource, which is used by the first node to perform a random access procedure including the first random access procedure.

[0267] As one embodiment, the third RRC message configures a target PRACH opportunity set, which includes a plurality of PRACH opportunities.

[0268] As one embodiment, the third RRC message is carried in a SIB.

[0269] As one embodiment, the third RRC message is a cell-specific message.

[0270] As one embodiment, the third RRC message is a group-specific message.

[0271] As one embodiment, the third RRC message is a UE-specific message.

[0272] As one embodiment, the third RRC message is a higher layer message.

[0273] As one embodiment, the third RRC message includes at least one IE in RRC signaling.

[0274] As one embodiment, the third RRC message comprises at least one field in one IE in RRC signaling.

[0275] As one embodiment, the third RRC message comprises RACH-ConfigCommon.

[0276] As one embodiment, the third RRC message comprises RACH-ConfigCommonTwoStepRA.

[0277] As one embodiment, the third RRC message comprises RACH-ConfigGeneric.

[0278] As one embodiment, the third RRC message comprises RACH-ConfigGenericTwoStepRA.

[0279] As one embodiment, the third RRC message comprises RACH-ConfigDedicated.

[0280] As one embodiment, the third RRC message comprises AdditionalRACH-Config.

[0281] As one embodiment, the third RRC message indicates the location of the target PRACH opportunity set in time domain.

[0282] As one embodiment, the third RRC message indicates the subframe, the slot and the starting symbol and the number of included symbols in the slot of the target PRACH opportunity set in time domain.

[0283] As one embodiment, the target PRACH opportunity set is located in multiple slots in time domain.

[0284] As one embodiment, the target PRACH opportunity set comprises periodic PRACH opportunities in time domain.

[0285] As one embodiment, the third RRC message indicates the location of the target PRACH opportunity set in frequency domain.

[0286] As one embodiment, the third RRC message indicates that K PRACH opportunities are included in one time instance.

[0287] As an embodiment, the K is a positive integer.

[0288] As an embodiment, the K is one of 1, 2, 4 and 8.

[0289] As an embodiment, the K PRACH occasions included in the one time instance are Frequency Division Multiplexing (FDM).

[0290] As an embodiment, the K PRACH occasions included in the one time instance are consecutive in frequency domain.

[0291] As an embodiment, the third RRC message indicates a starting frequency domain location of the K PRACH occasions included in the one time instance.

[0292] As an embodiment, the third RRC message indicates an offset of a lowest PRACH occasion in frequency domain among the K PRACH occasions included in the one time instance relative to PRB (Physical Resource Block) 0.

[0293] As an embodiment, the one time instance includes a time duration in time domain of one PRACH occasion included in the target PRACH occasion.

[0294] As an embodiment, the one time instance includes a time duration in time domain of one PRACH resource included in the target PRACH occasion.

[0295] As an embodiment, the one time instance includes a time duration occupied by any random access preamble included in the at least one random access preamble.

[0296] As an embodiment, the one time instance includes at least 2 symbols.

[0297] As an embodiment, the third RRC message indicates a time duration of the one time instance.

[0298] As an embodiment, the random access resource used in the first random access procedure includes at least one PRACH occasion, and the at least one PRACH occasion belongs to the target PRACH occasion set.

[0299] As an embodiment, the at least one PRACH occasion corresponds to the at least one random access preamble.

[0300] As a sub-embodiment of the above-mentioned embodiment, the at least one random access preamble is transmitted in the at least one PRACH occasion respectively.

[0301] As an embodiment, the at least one PRACH occasion is selected from the plurality of PRACH occasions included in the target PRACH occasion set by the first node.

[0302] As an embodiment, part of the plurality of PRACH occasions included in the target PRACH occasion set comprises symbols in time domain that are all the non-SBFD symbols, and the remaining part of the plurality of PRACH occasions included in the target PRACH occasion set comprises symbols in time domain that include at least one SBFD symbol.

[0303] As an embodiment, the random access resource used in the first random access procedure is associated with at least the former of the SBFD symbol and the non-SBFD symbol comprises: the at least one PRACH occasion used in the first random access procedure is selected from the plurality of PRACH occasions included in the target PRACH occasion set.

[0304] As an embodiment, the at least one random access preamble belongs to a target random access preamble group, and the target random access preamble group is only available for SBFD-aware nodes.

[0305] As an embodiment, the target random access preamble group includes at least one random access preamble.

[0306] As an embodiment, the at least one random access preamble is preferentially selected from the target random access preamble group.

[0307] As an embodiment, each random access preamble included in the at least one random access preamble is randomly selected with equal probability from the target random access preamble group.

[0308] As an embodiment, the target random access preamble group is associated with an SBFD feature.

[0309] As an embodiment, the target random access preamble group is only available for SBFD-aware nodes.

[0310] As an embodiment, the third RRC message configures the target random access preamble group.

[0311] As an embodiment, the random access resource used in the first random access procedure is associated with the SBFD symbol and the non-SBFD symbol.

[0312] As a sub-embodiment of the above-mentioned embodiment, the random access resource is the PRACH occasion, and the PRACH occasion belongs to the target PRACH occasion set.

[0313] As an embodiment, the first node performs the first random access procedure using the target random access resource configured by the third RRC message, and sets the content of the first variable after the first random access procedure succeeds or fails.

[0314] As an embodiment, the setting of the content of the first variable includes setting one sub-variable included in the first variable to indicate that each PUSCH resource associated with at least one PRACH occasion includes only the SBFD symbol in the included symbol; wherein the at least one random access preamble is respectively sent in the at least one PRACH occasion.

[0315] As a sub-embodiment of the above-mentioned embodiment, the one sub-variable is PUSCHSBFD.

[0316] As a sub-embodiment of the above-mentioned embodiment, the value of the one sub-variable is set to true (true).

[0317] As an embodiment, the setting of the content of the first variable includes setting one sub-variable included in the first variable to indicate that each PUSCH resource associated with at least one PRACH occasion includes at least one SBFD symbol in the included symbol; wherein the at least one random access preamble is respectively sent in the at least one PRACH occasion.

[0318] As a sub-embodiment of the above-mentioned embodiment, the one sub-variable is PUSCHSBFD.

[0319] As a sub-embodiment of the above-mentioned embodiment, the value of the one sub-variable is set to true (true).

[0320] As an embodiment, the setting of the content of the first variable includes setting one sub-variable included in the first variable to indicate that M PUSCH resources respectively associated with M PRACH occasions included in at least one PRACH occasion include at least one SBFD symbol in the included symbol; wherein the at least one random access preamble is respectively sent in the at least one PRACH occasion; and the M is not greater than the number of PRACH occasions included in the at least one PRACH occasion.

[0321] As a sub-embodiment of the above-mentioned embodiment, the one sub-variable is PUSCHSBFD.

[0322] As a sub-embodiment of the above-mentioned embodiment, the value of the one sub-variable is set to true.

[0323] As a sub-embodiment of the above-mentioned embodiment, the value of the one sub-variable is set to the M.

[0324] As an embodiment, the content of the setting the first variable comprises setting one sub-variable included in the first variable to indicate a SBFD feature.

[0325] As a sub-embodiment of the above-mentioned embodiment, the value of the one sub-variable is set to SBFD.

[0326] As an embodiment, a first RRC message is received, the first RRC message requesting user information reporting.

[0327] As a sub-embodiment of the above-mentioned embodiment, the first RRC message is sent by the second node N52 after successful security activation.

[0328] As an embodiment, a second RRC message is sent, the second RRC message being a response to the first RRC message.

[0329] As a sub-embodiment of the above-mentioned embodiment, the second RRC message is sent by the first node N51 after successful security activation.

[0330] As an embodiment, the first RRC message is a UEInformationRequest.

[0331] As a sub-embodiment of the above-mentioned embodiment, the second RRC message is a UEInformationResponse.

[0332] As an embodiment, the first RRC message is a ra-ReportReq.

[0333] As a sub-embodiment of the above-mentioned embodiment, the second RRC message is a ra_Report.

[0334] As a sub-embodiment of the above-mentioned embodiment, the second RRC message is a ra_ReportList.

[0335] As an embodiment, the content of the first variable is included in the second RRC message.

[0336] As one embodiment, a second variable is set with the content of the first variable, and the second variable is included in the second RRC message.

[0337] As one embodiment, when the second RRC message is successfully sent, the content of the first variable is discarded.

[0338] As one embodiment, when the second RRC message is successfully sent, the ra-ReportList including the content of the first variable is discarded.

[0339] As one sub-embodiment of the above two embodiments, a lower layer of the first node N51 confirms that the second RRC message is successfully sent.

[0340] As one embodiment, the content of the first variable is set and the first variable is stored after the first random access procedure is successful or after the failure. After the first RRC message is received, the first node N51 feeds back the content of the first variable to the second node N52 through the second RRC message, and the second node N52 can optimize the parameter configuration of the random access procedure by obtaining the variable parameter for performing the random access procedure, thereby improving the performance of the communication system.

[0341] Embodiment 6

[0342] Embodiment 6 illustrates a schematic diagram of a time domain position of an SBFD symbol according to one embodiment of the present application, as shown in FIG. 6. The oblique line filled rectangular box in FIG. 6 represents an SBFD symbol, and the non-filled rectangular box represents a non-SBFD symbol.

[0343] As one embodiment, a symbol with the first sub-band for the SBFD operation is defined as the SBFD symbol.

[0344] As one embodiment, the SBFD symbol is defined in a downlink symbol.

[0345] As one sub-embodiment of the above embodiment, the downlink symbol is configured by TDD-UL-DL-ConfigCommon (time division duplex uplink-downlink common configuration).

[0346] As one sub-embodiment of the above embodiment, the downlink symbol is configured by TDD-UL-DL-ConfigDedicated (time division duplex uplink-downlink dedicated configuration).

[0347] As a sub-embodiment of the above-mentioned embodiment, the downlink symbol is configured as a flexible symbol by TDD-UL-DL-ConfigCommon, or by TDD-UL-DL-ConfigDedicated, and is dynamically indicated as a downlink symbol.

[0348] As an embodiment, the setting the first variable includes setting a sub-variable included in the first variable to indicate a time domain location of the SBFD symbol.

[0349] As a sub-embodiment of the above-mentioned embodiment, the sub-variable is TimeDomainLocationSBFD.

[0350] As an embodiment, setting a sub-variable included in the first variable indicates a time domain pattern, the time domain pattern indicating a time domain location of the SBFD symbol.

[0351] As a sub-embodiment of the above-mentioned embodiment, the sub-variable is TimeDomainPatternSBFD.

[0352] As an embodiment, the time domain location of the SBFD symbol is indicated by a SBFD symbol pattern in a time period.

[0353] As an embodiment, the time period includes a slot.

[0354] As an embodiment, the time period includes multiple slots.

[0355] As an embodiment, the slot includes multiple symbols.

[0356] As an embodiment, the time period is the same as dl-UL-TransmissionPeriodicity in TDD-UL-DL-ConfigCommon.

[0357] As an embodiment, the time period is an integer multiple of dl-UL-TransmissionPeriodicity in TDD-UL-DL-ConfigCommon.

[0358] As an embodiment, the SBFD symbol pattern includes a starting position and a number of consecutive symbols of the SBFD symbol in a time period.

[0359] Specifically, one time period includes 5 slots, which are D1, D2, D3, D4 and U5 respectively, wherein D represents a downlink slot, U represents an uplink slot, and each slot includes 14 symbols; the SBFD symbol pattern indicates that symbol 5 and the next 20 symbols are SBFD symbols.

[0360] As an embodiment, the SBFD symbol pattern includes a DL slot in one time period and a starting position and a number of continuous symbols of the SBFD symbol in the DL slot.

[0361] Specifically, one time period includes 5 slots, which are D1, D2, D3, D4 and U5 respectively, wherein D represents a downlink slot, U represents an uplink slot, and each slot includes 14 symbols; the SBFD pattern indicates that symbol 7 in D1 and the next 6 symbols, i.e. symbols 7-13, are SBFD symbols, and symbol 0 in D2 and the next 6 symbols, i.e. symbols 0-6, are SBFD symbols.

[0362] As an embodiment, the time domain position of the SBFD symbol is indicated by a bitmap, and each bit in the bitmap indicates whether the corresponding symbol included in one time period is an SBFD symbol or a non-SBFD symbol.

[0363] Specifically, one time period includes 1 slot, the 1 slot includes 14 symbols, the bitmap includes 14 bits, and each bit in the 14 bits indicates whether the corresponding 14 symbols are SBFD symbols or non-SBFD symbols; for example, when a bit is set to 1, it indicates an SBFD symbol, and when a bit is set to 0, it indicates a non-SBFD symbol; or when a bit is set to 1, it indicates a non-SBFD symbol, and when a bit is set to 0, it indicates an SBFD symbol.

[0364] Figure 6 of embodiment 6 illustrates 2 complete slots, each of which includes 14 symbols, wherein the 14 symbols included in the first slot are all SBFD symbols, and the first 7 symbols of the 14 symbols included in the second slot are SBFD symbols and the last 7 symbols are non-SBFD symbols.

[0365] Embodiment 7

[0366] Embodiment 7 illustrates a schematic diagram of the relationship between the SBFD symbol and the first subband according to an embodiment of the present application, as shown in Figure 7. In Figure 7, the oblique line filled rectangular box represents the first subband, the oblique grid filled rectangular box represents the guard band, and the unfilled rectangular box represents the downlink subband.

[0367] As one embodiment, a first RRC message is received.

[0368] As one embodiment, the first RRC message is carried in a SIB (System Information Block).

[0369] As one embodiment, the first RRC message is a cell-specific message.

[0370] As one embodiment, the first RRC message is a higher layer message.

[0371] As one embodiment, the first RRC message is RRC signaling.

[0372] As one embodiment, the first RRC message includes at least one IE in the RRC signaling.

[0373] As one embodiment, the first RRC message includes at least one field in one IE in the RRC signaling.

[0374] As one embodiment, the first RRC message includes some or all fields in a RRCReconfiguration IE.

[0375] As one embodiment, the first RRC message includes some or all fields in a RRCResume IE.

[0376] As one embodiment, the first RRC message includes some or all fields in a ServingCellConfig IE.

[0377] As one embodiment, the first RRC message indicates a frequency domain location of the first subband.

[0378] As one embodiment, the first RRC message indicates a time domain location of the SBFD symbol.

[0379] As one embodiment, the time domain location of the SBFD symbol is a time domain location of the first subband.

[0380] As one embodiment, the first RRC message explicitly indicates the time domain location of the SBFD symbol.

[0381] As one embodiment, the first RRC message implicitly indicates the time domain location of the SBFD symbol.

[0382] As one embodiment, a third RRC message is received, the third RRC message configuring a set of target PRACH occasions.

[0383] As an embodiment, the setting the first variable includes setting a sub-variable included in the first variable to indicate a frequency domain location and a bandwidth of the first sub-band.

[0384] As a sub-embodiment of the above embodiment, the one sub-variable is locationAndBandwidthSBFD.

[0385] As an embodiment, a transmission direction on the first sub-band is uplink.

[0386] As an embodiment, the frequency domain location of the first sub-band is indicated by a sub-band pattern, the sub-band pattern is {DUD}, or is {DU}, or is {UD}; wherein the D represents a downlink sub-band, and the U represents an uplink sub-band, i.e., the first sub-band.

[0387] As an embodiment, the sub-band pattern indicates a frequency domain starting location of the first sub-band and a number of continuous RBs (resource blocks) included in the first sub-band.

[0388] As an embodiment, the sub-band pattern indicates one of a frequency domain location of a guard band and a frequency domain location of the downlink sub-band.

[0389] As an embodiment, the first sub-band is used for uplink transmission.

[0390] As an embodiment, the downlink sub-band is used for downlink transmission.

[0391] As an embodiment, the guard band is not used for wireless transmission.

[0392] As an embodiment, setting a sub-variable included in the first variable indicates a sub-carrier spacing of the first sub-band.

[0393] As a sub-embodiment of the above embodiment, the one sub-variable is subcarrierSpacingSBFD.

[0394] As an embodiment, the first sub-band and the downlink sub-band are configured with a same sub-carrier spacing.

[0395] As an embodiment, the first sub-band and the downlink sub-band are configured with different sub-carrier spacings.

[0396] As an embodiment, frequency domain resources occupied by at least part of the at least one random access preamble are located in the first sub-band.

[0397] The downlink sub-band in Embodiment 7 is separated from the first sub-band by the guard band.

[0398] In an example of Case A of Embodiment 7, the channel bandwidth includes two downlink sub-bands and the first sub-band, where the two downlink sub-bands are located at two ends of the channel bandwidth, and the first sub-band is located at the center of the channel bandwidth.

[0399] In an example of Case B of Embodiment 7, the channel bandwidth includes one downlink sub-band and the first sub-band, which are located at two ends of the channel bandwidth, respectively.

[0400] Embodiment 8

[0401] Embodiment 8 illustrates a diagram of a PRACH occasion and at least one random access preamble according to an embodiment of the present application, as shown in FIG. 8. In FIG. 8, the oblique line filled rectangular box represents a PRACH occasion including only SBFD symbols in time domain, the non-filled rectangular box represents a PRACH occasion including only non-SBFD symbols in time domain, and the positive lattice filled rectangular box represents a PRACH occasion including one random access preamble in a first random access procedure.

[0402] As an embodiment, the content of setting the first variable includes setting one sub-variable included in the first variable to indicate that only the SBFD symbols are included in the symbols occupied when each of the at least one random access preamble is transmitted.

[0403] As a sub-embodiment of the above embodiment, the one sub-variable is ROSBFD.

[0404] As a sub-embodiment of the above embodiment, the value of the one sub-variable is set to true.

[0405] As a sub-embodiment of the above embodiment, only the SBFD symbols are included in the symbols occupied when any of the at least one random access preamble included in the first random access procedure is transmitted.

[0406] As a sub-embodiment of the above embodiment, the at least one random access preamble included in the first random access procedure is transmitted in a first type of PRACH occasion.

[0407] As an embodiment, the first type of PRACH occasion includes only the SBFD symbols in time domain.

[0408] As an embodiment, the symbols occupied when a random access preamble is transmitted are the symbols included in a PRACH occasion in time domain.

[0409] The PRACH occasions located in five non-continuous time instances in time domain are illustrated in FIG. 8 of Embodiment 8, including 4 PRACH occasions consecutively in frequency domain in each time instance from bottom to top; wherein, the 4 PRACH occasions included in the first time instance, the second time instance and the fifth time instance from left to right respectively include only the SBFD symbols in time domain; the 4 PRACH occasions included in the third time instance and the fourth time instance respectively include only the non-SBFD symbols in time domain; wherein, the non-SBFD symbols are uplink symbols.

[0410] In FIG. 8 of Embodiment 8, the sending the at least one random access preamble included in the first random access procedure includes sending 3 random access preambles, which are sent in the third PRACH occasion included in the first time instance, the first PRACH occasion included in the second time instance and the fourth PRACH occasion included in the fifth time instance respectively; wherein, the 4 PRACH occasions included in the first time instance, the second time instance and the fifth time instance respectively include only the SBFD symbols in time domain, so that one sub-variable included in the first variable is set to indicate that only the SBFD symbols are included in the symbols occupied when sending each of the at least one random access preamble.

[0411] As an embodiment, the content of setting the first variable includes setting one sub-variable included in the first variable to indicate that only the non-SBFD symbols are included in the symbols occupied when sending each of the at least one random access preamble.

[0412] As a sub-embodiment of the above-mentioned embodiment, the one sub-variable is ROnonSBFD.

[0413] As a sub-embodiment of the above-mentioned embodiment, the value of the one sub-variable is set to true (true).

[0414] As a sub-embodiment of the above-mentioned embodiment, only the non-SBFD symbols are included in the symbols occupied when sending any of the at least one random access preamble included in the first random access procedure.

[0415] As a sub-embodiment of the above-mentioned embodiment, the at least one random access preamble included in the first random access procedure is sent in the second type of PRACH occasion.

[0416] As an embodiment, the second type of PRACH occasion includes only the non-SBFD symbols in time domain.

[0417] Embodiment 9

[0418] Embodiment 9 illustrates a diagram of a PRACH occasion and at least one random access preamble according to an embodiment of the present application, as shown in FIG. 9. In FIG. 9, the oblique line filled rectangular box represents a PRACH occasion including only SBFD symbols in time domain, the non-filled rectangular box represents a PRACH occasion including only non-SBFD symbols in time domain, the vertical line filled rectangular box represents a PRACH occasion including partial SBFD symbols in time domain, and the positive grid filled rectangular box represents a PRACH occasion including one random access preamble included in the first random access procedure.

[0419] As an embodiment, the setting the content of the first variable includes setting one sub-variable included in the first variable to indicate that at least one of the SBFD symbols is included in the symbols occupied when each of the at least one random access preamble is transmitted; and wherein each of the at least one random access preamble is transmitted occupying at least two symbols.

[0420] As a sub-embodiment of the above embodiment, the one sub-variable is ROSBFD.

[0421] As a sub-embodiment of the above embodiment, the value of the one sub-variable is set to true.

[0422] As a sub-embodiment of the above embodiment, the symbols occupied when any of the at least one random access preamble included in the first random access procedure is transmitted include at least one of the SBFD symbols.

[0423] As a sub-embodiment of the above embodiment, the symbols occupied when one of the at least one random access preamble included in the first random access procedure is transmitted include only the SBFD symbols.

[0424] As a sub-embodiment of the above embodiment, the symbols occupied when one of the at least one random access preamble included in the first random access procedure is transmitted include partial SBFD symbols and partial non-SBFD symbols.

[0425] As a sub-embodiment of the above embodiment, the at least one random access preamble included in the first random access procedure is transmitted in at least one of the third type of PRACH occasion and the first type of PRACH occasion.

[0426] As an embodiment, the symbols included in the third type of PRACH occasion in time domain include partial SBFD symbols and partial non-SBFD symbols.

[0427] Figure 9 of embodiment 9 illustrates PRACH occasions located in five non-continuous time instances in time domain, including 4 PRACH occasions from bottom to top in each time instance in frequency domain; wherein the 4 PRACH occasions included in the first and second time instances from left to right respectively include only the SBFD symbols in time domain; the 4 PRACH occasions included in the third time instance include only the non-SBFD symbols in time domain; the 4 PRACH occasions included in the fourth and fifth time instances respectively include part of the SBFD symbols and part of the non-SBFD symbols in time domain; wherein the non-SBFD symbols are uplink symbols.

[0428] In Figure 9 of embodiment 9, the transmitting the at least one random access preamble included in the performing the first random access procedure includes transmitting 2 random access preambles, which are transmitted in the fourth PRACH occasion included in the second time instance and the first PRACH occasion included in the fourth time instance respectively; wherein the 4 PRACH occasions included in the second time instance include only the SBFD symbols in time domain, and the 4 PRACH occasions included in the fourth time instance include part of the SBFD symbols and part of the non-SBFD symbols in time domain, thus the setting the one sub-variable included in the first variable indicates that at least one of the SBFD symbols is included in the symbols occupied when transmitting each of the at least one random access preamble.

[0429] Embodiment 10

[0430] Embodiment 10 illustrates a schematic diagram of PRACH occasions and at least one random access preamble according to one embodiment of the present application, as shown in Figure 10. In Figure 10, the oblique line filled rectangular box represents a PRACH occasion including only SBFD symbols in time domain, the non-filled rectangular box represents a PRACH occasion including only non-SBFD symbols in time domain, the vertical line filled rectangular box represents a PRACH occasion including part of SBFD symbols in time domain, and the positive grid filled rectangular box represents a PRACH occasion in which one random access preamble included in the first random access procedure is transmitted.

[0431] As one embodiment, the setting the content of the first variable includes setting one sub-variable included in the first variable to indicate that at least one of the SBFD symbols is included in the symbols occupied when transmitting Q1 random access preambles included in the at least one random access preamble; wherein the Q1 is equal to 0, or is a positive integer greater than 0.

[0432] As one sub-embodiment of the above-mentioned embodiment, the one sub-variable is noROSBFD.

[0433] As one sub-embodiment of the above-mentioned embodiment, the value of the one sub-variable is set to the Q1.

[0434] As one sub-embodiment of the above-mentioned embodiment, the at least one random access preamble comprised in the first random access procedure is transmitted in any of the first type of PRACH occasion, the second type of PRACH occasion and the third type of PRACH occasion.

[0435] As one embodiment, the Q1 is not larger than a number of random access preambles comprised in the at least one random access preamble.

[0436] The PRACH occasions in the time domain located in five non-continuous time instances are exemplified in FIG. 10 of Embodiment 10, in each time instance comprising 4 PRACH occasions in the frequency domain successively from bottom to top; wherein the 4 PRACH occasions comprised in the first time instance and the fifth time instance from left to right respectively comprise only the SBFD symbols in the time domain; the 4 PRACH occasions comprised in the second time instance comprise part of the SBFD symbols and part of the non-SBFD symbols in the time domain; the 4 PRACH occasions comprised in the third time instance and the fourth time instance respectively comprise only the non-SBFD symbols in the time domain; wherein the non-SBFD symbols are uplink symbols.

[0437] In FIG. 10 of Embodiment 10, the transmitting the at least one random access preamble comprised in the first random access procedure comprises transmitting 3 random access preambles, which are respectively transmitted in the fourth PRACH occasion comprised in the second time instance, the third PRACH occasion comprised in the third time instance and the first PRACH occasion comprised in the fifth time instance; wherein the 4 PRACH occasions comprised in the second time instance comprise part of the SBFD symbols and part of the non-SBFD symbols in the time domain, the 4 PRACH occasions comprised in the third time instance comprise only the non-SBFD symbols in the time domain, and the 4 PRACH occasions comprised in the fifth time instance comprise only the SBFD symbols in the time domain, i.e. the SBFD symbols are comprised in the symbols occupied when 2 random access preambles of the 3 random access preambles are transmitted, therefore one sub-variable comprised in the first variable is set to indicate that at least one SBFD symbol is comprised in the symbols occupied when 2 random access preambles comprised in the at least one random access preamble are transmitted.

[0438] Embodiment 11

[0439] Embodiment 11 illustrates a diagram of a PRACH occasion and at least one random access preamble according to an embodiment of the present application, as shown in FIG. 11. In FIG. 11, the diagonally filled rectangular box represents a PRACH occasion including only SBFD symbols in time domain, the unfilled rectangular box represents a PRACH occasion including only non-SBFD symbols in time domain, and the positively cross-hatched rectangular box represents a PRACH occasion in which one random access preamble included in a first random access procedure is transmitted.

[0440] As one embodiment, the setting the content of the first variable includes setting one sub-variable included in the first variable to indicate that the first Q2 random access preambles included in the at least one random access preamble are transmitted in symbols including at least one SBFD symbol, and the last Q3 random access preambles included in the at least one random access preamble are transmitted in symbols including only the non-SBFD symbol.

[0441] As one sub-embodiment of the above-mentioned embodiment, the one sub-variable indicates that the first random access procedure applies fallback from a PRACH occasion including the SBFD symbol to a PRACH occasion including only the non-SBFD symbol.

[0442] As one sub-embodiment of the above-mentioned embodiment, the one sub-variable is fallbackToNonSBFDRO.

[0443] As one sub-embodiment of the above-mentioned embodiment, the value of the one sub-variable is set to true.

[0444] As one sub-embodiment of the above-mentioned embodiment, the value of the one sub-variable is set to Q2.

[0445] As one sub-embodiment of the above-mentioned embodiment, the value of the one sub-variable is set to Q2Q3.

[0446] As one sub-embodiment of the above-mentioned embodiment, the first Q2 random access preambles included in the at least one random access preamble included in the first random access procedure are transmitted in the first type of PRACH occasion, and the last Q3 random access preambles included in the at least one random access preamble are transmitted in the second type of PRACH occasion.

[0447] As one sub-embodiment of the above-mentioned embodiment, the first Q2 random access preambles included in the at least one random access preamble included in the first random access procedure are transmitted in the first type of PRACH occasion, and the last Q3 random access preambles included in the at least one random access preamble are transmitted in the second type of PRACH occasion. As one sub-embodiment of the above-mentioned embodiment, the first Q2 random access preambles included in the at least one random access preamble included in the first random access procedure are transmitted in the first type of PRACH occasion, and the last Q3 random access preambles included in the at least one random access preamble are transmitted in the second type of PRACH occasion.

[0448] As an embodiment, the Q2 and the Q3 are positive integers greater than 0, respectively.

[0449] As an embodiment, the at least one random access preamble includes at least 2 random access preambles.

[0450] As an embodiment, the sum of the Q2 and the Q3 is equal to the number of random access preambles included in the at least one random access preamble.

[0451] The PRACH opportunities located in five non-continuous time instances in time domain are illustrated in FIG. 11 of embodiment 11, including 4 PRACH opportunities which are continuous in frequency domain from bottom to top in each time instance; wherein, the 4 PRACH opportunities included in the first time instance, the second time instance and the third time instance from left to right respectively include only the SBFD symbols in time domain; the 4 PRACH opportunities included in the fourth time instance and the fifth time instance respectively include only the non-SBFD symbols in time domain; wherein, the non-SBFD symbols are uplink symbols.

[0452] In FIG. 11 of embodiment 11, the sending the at least one random access preamble included in the first random access procedure includes sending 4 random access preambles, which are sent in the fourth PRACH opportunity included in the first time instance, the second PRACH opportunity included in the second time instance, the third PRACH opportunity included in the third time instance and the first PRACH opportunity included in the fifth time instance, respectively; wherein, the 4 PRACH opportunities included in the first time instance, the second time instance and the third time instance from left to right respectively include only the SBFD symbols in time domain, the 4 PRACH opportunities included in the fourth time instance and the fifth time instance respectively include only the non-SBFD symbols in time domain, i.e. the first 3 random access preambles of the 4 random access preambles include only the SBFD symbols in the symbols occupied when they are sent, the last 1 random access preamble of the 4 random access preambles includes only the non-SBFD symbols in the symbols occupied when it is sent, so that one sub-variable included in the first variable indicates that at least one SBFD symbol is included in the symbols occupied when the first 3 random access preambles included in the at least one random access preamble are sent, and only the non-SBFD symbol is included in the symbols occupied when the last 1 random access preamble included in the at least one random access preamble is sent.

[0453] Embodiment 12

[0454] Embodiment 12 illustrates a diagram of symbols in time domain that a target PRACH opportunity set includes according to one embodiment of the present application, as shown in FIG. 12. In FIG. 12, the rectangle box filled with diagonal lines represents the SBFD symbol.

[0455] As one embodiment, one PRACH opportunity included in the target PRACH opportunity set includes Q symbols in time domain; wherein the Q is a positive integer greater than 1.

[0456] As one sub-embodiment of the above embodiment, the Q symbols are all the SBFD symbols, and the one PRACH opportunity is in the first sub-band in frequency domain.

[0457] As one sub-embodiment of the above embodiment, the Q symbols are all the non-SBFD symbols, and the one PRACH opportunity is in the UL BWP in frequency domain.

[0458] As one sub-embodiment of the above embodiment, the Q symbols include at least one SBFD symbol and at least one non-SBFD symbol, and the Q symbols start with the at least one SBFD symbol and end with the at least one non-SBFD symbol.

[0459] As one sub-embodiment of the above sub-embodiment, the one PRACH opportunity is in the first sub-band in frequency domain for the at least one SBFD symbol included in time domain, and the first PRACH opportunity is in the UL BWP in frequency domain for the at least one non-SBFD symbol included in time domain.

[0460] As one embodiment, the Q symbols are in the same slot.

[0461] As one embodiment, the Q symbols are across slots, i.e., in different slots.

[0462] As one embodiment, the Q is configured by the third RRC message.

[0463] In FIG. 12 of Embodiment 12, the target PRACH opportunity set includes PRACH opportunities in time domain located in three non-continuous time instances, and includes 4 PRACH opportunities in frequency domain continuously in each time instance, and each PRACH opportunity includes Q=6 symbols in time domain; wherein the 4 PRACH opportunities included in the first time instance include 6 SBFD symbols in time domain; the 4 PRACH opportunities included in the second time instance include 4 SBFD symbols and 2 non-SBFD symbols in time domain; the 4 PRACH opportunities included in the third time instance include 6 non-SBFD symbols in time domain; wherein the non-SBFD symbol is an uplink symbol.

[0464] As an embodiment, after the first random access procedure is initiated, the first node selects at least one available PRACH occasion from the set of target PRACH occasions to transmit the at least one random access preamble, respectively.

[0465] Embodiment 13

[0466] Embodiment 13 illustrates a structure block diagram of a processing apparatus in a first node according to an embodiment of the present application, as shown in FIG. 13. In FIG. 13, the first node processing apparatus 1300 includes a first transceiver 1301 and a first processor 1302; the first node 1300 is a UE, or the first node 1300 is a terminal.

[0467] In embodiment 13, the first transceiver 1301 performs a first random access procedure; the first processor 1302 sets the content of a first variable including at least one sub-variable after the first random access procedure succeeds or fails; wherein the performing the first random access procedure includes transmitting at least one random access preamble; the content of the first variable depends on at least the first one of both SBFD symbols and non-SBFD symbols associated with random access resources used in the first random access procedure, the SBFD symbol being a symbol with a first sub-band for SBFD operation, the first sub-band being located in a UL BWP.

[0468] As an embodiment, the setting the content of the first variable includes setting a sub-variable included in the first variable to indicate the time domain position of the SBFD symbol.

[0469] As an embodiment, the setting the content of the first variable includes setting a sub-variable included in the first variable to indicate the frequency domain position and bandwidth of the first sub-band.

[0470] As an embodiment, the setting the content of the first variable includes setting a sub-variable included in the first variable to indicate that only the SBFD symbol is included in the symbols occupied when transmitting each of the at least one random access preamble.

[0471] As an embodiment, the setting the content of the first variable includes setting a sub-variable included in the first variable to indicate that at least one SBFD symbol is included in the symbols occupied when transmitting each of the at least one random access preamble; wherein at least two symbols are occupied when transmitting each of the at least one random access preamble.

[0472] As an embodiment, the content of setting the first variable includes setting a sub-variable included in the first variable to indicate that at least one of the SBFD symbols is included in the symbols occupied when transmitting the first Q1 random access preambles included in the at least one random access preamble; wherein the Q1 is equal to 0, or is a positive integer greater than 0.

[0473] As an embodiment, the content of setting the first variable includes setting a sub-variable included in the first variable to indicate that at least one of the SBFD symbols is included in the symbols occupied when transmitting the first Q2 random access preambles included in the at least one random access preamble, and only the non-SBFD symbols are included in the symbols occupied when transmitting the last Q3 random access preambles included in the at least one random access preamble; wherein the Q2 and the Q3 are respectively a positive integer greater than 0; and the at least one random access preamble includes at least 2 random access preambles.

[0474] As an embodiment, the first transceiver 1301 receives a first RRC message, the first RRC message requests user information reporting; the first transceiver 1301 transmits a second RRC message, the second RRC message is a response to the first RRC message; the first processor 1302 discards the content of the first variable when the second RRC message is successfully transmitted; wherein the second RRC message includes the content of the first variable.

[0475] As an embodiment, the first transceiver 1301 receives a third RRC message, the third RRC message configures a target PRACH opportunity set, the target PRACH opportunity set includes a plurality of PRACH opportunities; wherein the random access resource used in the first random access process includes at least one PRACH opportunity, and the at least one PRACH opportunity belongs to the target PRACH opportunity set; part of the PRACH opportunities in the target PRACH opportunity set include only the non-SBFD symbols in the time domain, and the remaining part of the PRACH opportunities in the target PRACH opportunity set include at least one SBFD symbol in the time domain.

[0476] As an embodiment, the first node is an SBFD-aware node.

[0477] As an embodiment, the at least one random access preamble belongs to a target random access preamble group, and the target random access preamble group is only available for SBFD-aware nodes; wherein the random access resource used in the first random access process is associated with the SBFD symbol and the non-SBFD symbol.

[0478] As an example, the first transceiver 1301 includes at least one of the receiver 454 (including the antenna 452), the transmit processor 468, the multi-antenna transmit processor 457, or the controller / processor 459 in FIG. 4.

[0479] As an example, the first transceiver 1301 includes at least one of the receiver 454 (including the antenna 452), the transmit processor 468, the multi-antenna transmit processor 457, or the controller / processor 459 in FIG. 4.

[0480] As an example, the first transceiver 1301 includes at least one of the receiver 454 (including the antenna 452), the transmit processor 468, the multi-antenna transmit processor 457, or the controller / processor 459 in FIG. 4.

[0481] As an example, the first transceiver 1301 includes at least one of the receiver 454 (including the antenna 452), the transmit processor 468, the multi-antenna transmit processor 457, or the controller / processor 459 in FIG. 4.

[0482] As an example, the first processor 1302 includes the controller / processor 459 in FIG. 4.

[0483] Those skilled in the art can understand that all or part of the steps of the above method can be instructed by a program to complete the relevant hardware, 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, etc. Alternatively, all or part of the steps of the above embodiment can also be implemented by using one or more integrated circuits. Correspondingly, each module unit in the above embodiment can be implemented in the form of hardware or in the form of a software function module, and the present application is not limited to any specific form of combination of software and hardware. The first type of communication node or UE or terminal in the present application includes but is not limited to a mobile phone, a tablet computer, a notebook computer, a network card, a low-power device, an eMTC (enhanced Machine Type Communication) device, an NB-IoT device, a vehicle-mounted communication device, a flying vehicle, an airplane, a drone, a remote control airplane, and other wireless communication devices. The second type of communication node or base station or network side device in the present application includes but is not limited to a macro cell base station, a micro cell base station, a home base station, a relay base station, an eNB, a gNB, a transmission and reception point TRP (Transmission and Reception Point), a relay satellite, a satellite base station, an air base station, and other wireless communication devices.

[0484] The above descriptions are only the preferred embodiment of the application, not intended to limit the protection scope of the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A method in a first node used for wireless communication, characterized by, Comprising: performing a first random access procedure; setting a content of a first variable including at least one sub-variable in the first variable, after the first random access procedure succeeds or, after the first random access procedure fails; wherein the performing the first random access procedure comprises transmitting at least one random access preamble; the content of the first variable depends on at least a first one of both of a SBFD symbol and a non-SBFD symbol associated with a random access resource used in the first random access procedure, the SBFD symbol being a symbol with a first sub-band for SBFD operation, the first sub-band being located in a UL BWP.

2. The method in the first node according to claim 1, characterized by, The setting the content of the first variable comprises setting a sub-variable included in the first variable to indicate a time domain location of the SBFD symbol.

3. A method in a first node according to claim 1 or 2, characterized by, The setting the content of the first variable comprises setting a sub-variable included in the first variable to indicate a frequency domain location and a bandwidth of the first sub-band.

4. A method in a first node according to any of claims 1 to 3, characterized by, The setting the content of the first variable comprises setting a sub-variable included in the first variable to indicate that only the SBFD symbol is included in symbols occupied when transmitting each of the at least one random access preamble.

5. A method in a first node according to any of claims 1 to 4, characterized by, The setting the content of the first variable comprises setting a sub-variable included in the first variable to indicate that at least one of the SBFD symbol is included in symbols occupied when transmitting each of the at least one random access preamble; wherein at least two symbols are occupied when transmitting each of the at least one random access preamble.

6. A method in a first node according to any of claims 1 to 5, characterized by, The setting the content of the first variable comprises setting a sub-variable included in the first variable to indicate that at least one of the SBFD symbol is included in symbols occupied when transmitting Q1 random access preambles included in the at least one random access preamble; wherein the Q1 is equal to 0, or is a positive integer greater than 0.

7. A method in a first node according to any of claims 1 to 6, characterized by, The setting the content of the first variable comprises setting a sub-variable included in the first variable to indicate that at least one of the SBFD symbol is included in symbols occupied when transmitting a first Q2 random access preambles included in the at least one random access preamble, and only the non-SBFD symbol is included in symbols occupied when transmitting a last Q3 random access preambles included in the at least one random access preamble; wherein the Q2 and the Q3 are respectively a positive integer greater than 0; and the at least one random access preamble includes at least 2 random access preambles.

8. A method in a first node according to any of claims 1 to 7, characterized by, Comprising: receiving a first RRC message, the first RRC message requesting user information reporting; transmitting a second RRC message, the second RRC message being a response to the first RRC message; when the second RRC message is successfully transmitted, discarding the content of the first variable; wherein the content of the first variable is included in the second RRC message.

9. The method in the first node according to any one of claims 1 to 8, characterized by receiving a third RRC message, the third RRC message configuring a target PRACH opportunity set, the target PRACH opportunity set including a plurality of PRACH opportunities; The random access resource used in the first random access procedure includes at least one PRACH opportunity, and the at least one PRACH opportunity belongs to the target PRACH opportunity set; part of the PRACH opportunities in the target PRACH opportunity set include only the non-SBFD symbol in the time domain, and the remaining part of the PRACH opportunities in the target PRACH opportunity set include at least one SBFD symbol in the time domain.

10. The method in the first node according to any of claims 1 - 9, characterized by, The first node is an SBFD-aware node.

11. The method in a first node according to any of claims 1 to 10, characterized by, The at least one random access preamble belongs to a target random access preamble group, and the target random access preamble group is available only for SBFD-aware nodes. The random access resource used in the first random access procedure is associated with the SBFD symbol and the non-SBFD symbol.

12. A terminal, comprising: one or more processors and a memory; the memory is coupled to the one or more processors, and the memory is configured to store computer program code, the computer program code including computer instructions, and the one or more processors are configured to invoke the computer instructions to cause the terminal to perform the method according to any one of claims 1-11.

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