Method and apparatus used in wireless communication

Abstract

Disclosed in the present application are a method and apparatus used in wireless communication. The method comprises: a first node receiving first signaling, wherein the first signaling indicates the transmission of an on-demand SSB in a first cell; and executing beam-related measurement for the first cell in a first time window, wherein the first cell is an SCell, the beam-related measurement comprises at least one of beam failure detection and candidate beam detection, the duration of the first time window depends on the transmission of the on-demand SSB, and a reference signal used in the beam-related measurement comprises the on-demand SSB. The present application can indicate how to execute beam failure detection and recovery in an on-demand SSB cell, and also facilitate network energy saving.

Description

A method and apparatus used in wireless communication

[0001] This application claims priority to the Chinese Patent Application No. 202411284869.3, filed on September 13, 2024, entitled “A method and apparatus used in wireless communication”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to a method and apparatus in a wireless communication system, and more particularly, to a method and apparatus for beam failure detection and recovery in a 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 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) #72 plenary meeting to study NR (New Radio) technology (or Fifth Generation, 5G), and the NR WI (Work Item) is passed at the 3GPP RAN #75 plenary meeting, and the standardization work of NR is started. The design of Release 15 5G system has considered some main application scenarios, and the subsequent versions will not only consider the enhancement of 5G system architecture, but also further enhance the vertical application to provide more flexible business matching, more robust transmission and more consistent user experience.

[0004] Network energy saving (NES) is crucial for environmental sustainability, reducing environmental impact, and saving operating costs. Due to the demand for higher data rates, denser networks, more antennas, larger bandwidths, and more frequency bands, the impact of wireless communication systems on the environment needs to be controlled, and new solutions to improve network energy saving need to be developed. SUMMARY

[0005] The inventors find that, in the version before R19, the transmission of SSB (Synchronization Signal / Physical Broadcast Channel Block) is always-on, and it is beneficial for energy saving to transmit SSB on demand in a cell by the network. If a UE (User Equipment) supports SSB transmitted on demand, the technical details of using on-demand SSB and other reference signals (RS) having a QCL relationship with the on-demand SSB for beam failure detection and recovery, etc. need to be further studied.

[0006] To solve the above problems, a solution is disclosed in the present application. In the case of no conflict, the embodiments in the first node and the features in the embodiments can be applied to the second node, and vice versa. In the case of no conflict, the embodiments and the features in the embodiments can be arbitrarily combined with each other. Further, although the original intention of the present application is for beam failure detection (BFD) and candidate beam detection (CBD), the present application is also applicable to other measurement scenarios, achieving similar technical effects. Further, although the original intention of the present application is for SCell (Secondary Cell), the present application is also applicable to SpCell (Special Cell), achieving similar technical effects. In addition, using a unified solution in different scenarios also helps to reduce hardware complexity and cost. In particular, the explanation of the terminology, nouns, functions, and variables in the present application (if not specially stated) can refer to the definitions in the specification protocols TS36 series, TS38 series, and TS37 series of 3GPP.

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

[0008] receiving first signaling, the first signaling indicating transmission of on-demand SSB in a first cell;

[0009] performing beam-related measurement for the first cell in a first time window;

[0010] wherein the first cell is an SCell, the beam-related measurement includes at least one of beam failure detection or candidate beam detection; the duration of the first time window depends on the transmission of the on-demand SSB; the reference signal used by the beam-related measurement includes the on-demand SSB.

[0011] As one embodiment, the first cell is a NES cell.

[0012] As one embodiment, the first node is in connected mode.

[0013] As one embodiment, at least the former of the beam failure detection and the candidate beam detection is performed in the first time window in response to receiving the first signaling; wherein the reference signal that the beam failure detection is targeting includes the on-demand SSB.

[0014] As one embodiment, the first signaling indicates when the beam-related measurement is performed.

[0015] As one embodiment, the first signaling indicates both the transmission of the on-demand SSB in the first cell and the performance of the beam-related measurement within the first time window, reducing signaling overhead.

[0016] As one embodiment, the above method has the benefit of facilitating avoiding unnecessary measurement.

[0017] As one embodiment, the above method has the benefit of facilitating reducing data transmission interruption due to measurement.

[0018] As one embodiment, the above method has the benefit of facilitating network energy saving.

[0019] As one embodiment, the above method has the benefit of having forward compatibility.

[0020] As one embodiment, the first node is a terminal.

[0021] According to one aspect of the present application, the above method is characterized in that the reference signal employed by the beam-related measurement includes a first reference signal, which is associated to the on-demand SSB.

[0022] As one embodiment, a reference signal being associated to the on-demand SSB means that the reference signal and the on-demand SSB are QCL (Quasi Co-location).

[0023] According to one aspect of the present application, the above method is characterized in that the transmission of the on-demand SSB includes transmitting a plurality of on-demand SSB bursts respectively in a plurality of on-demand transmission time windows.

[0024] The multiple on-demand transmission time windows have the same duration; the multiple on-demand transmission time windows and the multiple on-demand SSB bursts are periodic; and the first signaling indicates a period of the on-demand transmission time windows and a period of the on-demand SSB bursts.

[0025] As an embodiment, only the multiple on-demand SSB bursts respectively transmitted in the multiple on-demand transmission time windows are indicated by the first signaling, signaling overhead is saved.

[0026] According to an aspect of the present application, the above method is characterized in that a start time of the first time window is a start time of the transmission of the on-demand SSB, and an end time of the first time window is an end time of the transmission of the on-demand SSB.

[0027] According to an aspect of the present application, the above method is characterized in that it comprises:

[0028] A beam failure recovery (BFR) is triggered at a first time instant in the first cell.

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

[0030] Second signaling is transmitted, the second signaling indicating the beam failure recovery;

[0031] The second signaling indicates the on-demand SSB or not depends on a second time window; a start time of the second time window is later of the start time of the first time window and the first time instant; an end time of the second time window is a second time instant; the second time instant is within the first time window; the second signaling is generated or a scheduling request for the second signaling is triggered at the second time instant.

[0032] As an embodiment, the above method has the benefit of backward compatibility.

[0033] As an embodiment, as a response to the first signaling, the candidate beam detection is performed after the beam failure recovery is triggered in the first time window; and a reference signal to which the candidate beam detection is directed includes the on-demand SSB.

[0034] According to an aspect of the present application, the above method is characterized in that when the second time window is less than a second evaluation period, the second signaling does not indicate the on-demand SSB; and when the second time window is greater than or equal to the second evaluation period, whether the second signaling indicates the on-demand SSB further depends on a measurement result of the on-demand SSB in the second time window.

[0035] As an embodiment, the above method has the advantage that the influence of channel instantaneous change can be reduced when detecting candidate beams.

[0036] As an embodiment, the above method gives a minimum evaluation time requirement for the candidate beam detection of the first cell.

[0037] According to an aspect of the present application, the above method is characterized in that the triggering of the beam failure recovery depends on a measurement result of the reference signal employed for the beam-related measurement before the first time instant within the first time window;

[0038] wherein the first time instant is within the first time window; and a time interval from the start time of the first time window to the first time instant is greater than or equal to a first evaluation requirement.

[0039] As an embodiment, the above method has the advantage that the influence of channel instantaneous change can be reduced when detecting beam failure.

[0040] As an embodiment, the above method gives a minimum evaluation time requirement for the beam failure detection of the first cell.

[0041] According to an aspect of the present application, the above method is characterized in that an evaluation requirement depends on the period of the on-demand transmission time window or the period of the on-demand SSB burst;

[0042] wherein the evaluation requirement is the second evaluation requirement, or the first evaluation requirement.

[0043] As an embodiment, the evaluation requirement is determined based on at least one of the period of the on-demand transmission time window and the period of the on-demand SSB burst.

[0044] The present application discloses a terminal, characterized in that comprising:

[0045] The terminal comprises one or more processors and a memory;

[0046] The memory is coupled with the one or more processors, and the memory is configured to store computer program codes, the computer program codes comprising computer instructions, and the one or more processors are configured to invoke the computer instructions to cause the terminal to execute the above method in the first node.

[0047] As an embodiment, the terminal is a UE (User Equipment).

[0048] A method in a second node used for wireless communication is disclosed, which is characterized by comprising:

[0049] transmitting first signaling, the first signaling indicating transmission of on-demand SSBs in a first cell;

[0050] wherein beam-related measurements for the first cell are performed in a first time window; the first cell is an SCell, and the beam-related measurements comprise at least one of beam failure detection or candidate beam detection; a duration of the first time window depends on the transmission of the on-demand SSBs; a reference signal employed by the beam-related measurements comprises the on-demand SSBs.

[0051] As one embodiment, the second node is a base station.

[0052] According to one aspect of the present application, the above method is characterized in that the reference signal employed by the beam-related measurements comprises a first reference signal, which is associated to the on-demand SSBs.

[0053] According to one aspect of the present application, the above method is characterized in that the transmission of the on-demand SSBs comprises transmission of a plurality of on-demand SSB bursts respectively in a plurality of on-demand transmission time windows;

[0054] wherein the plurality of on-demand transmission time windows have a same duration; the plurality of on-demand transmission time windows and the plurality of on-demand SSB bursts are periodic; the first signaling indicates a periodicity of the on-demand transmission time windows and a periodicity of the on-demand SSB bursts.

[0055] According to one aspect of the present application, the above method is characterized in that a start time of the first time window is a start time of the transmission of the on-demand SSBs, and an end time of the first time window is an end time of the transmission of the on-demand SSBs.

[0056] According to one aspect of the present application, the above method is characterized by comprising:

[0057] a beam failure recovery is triggered in the first cell at a first time instant.

[0058] According to one aspect of the present application, the above method is characterized by comprising:

[0059] receiving second signaling, the second signaling indicating the beam failure recovery;

[0060] The second signaling indicates the on-demand SSB or not depends on a second time window; a start time of the second time window is a later one of the start time of the first time window and the first time; an end time of the second time window is a second time; the second time is within the first time window; the second signaling is indicated at the second time, or a scheduling request for the second signaling is triggered.

[0061] According to an aspect of the present application, the above method is characterized in that, when the second time window is less than a second evaluation requirement, the second signaling does not indicate the on-demand SSB; when the second time window is greater than or equal to the second evaluation requirement, whether the second signaling indicates the on-demand SSB further depends on a measurement result in the second time window for the on-demand SSB.

[0062] According to an aspect of the present application, the above method is characterized in that, the triggering of the beam failure recovery depends on a measurement result of the reference signal employed for the measurement related to the beam before the first time within the first time window.

[0063] The first time is within the first time window; a time interval from the start time of the first time window to the first time is greater than or equal to a first evaluation requirement.

[0064] According to an aspect of the present application, the above method is characterized in that, one evaluation requirement depends on the period of the on-demand transmission time window or the period of the on-demand SSB burst.

[0065] The evaluation requirement is the second evaluation requirement, or the first evaluation requirement.

[0066] The present application discloses a base station, characterized in that, comprising:

[0067] The base station comprises one or more processors and a memory;

[0068] The memory is coupled with the one or more processors, and the memory is configured to store computer program codes, the computer program codes comprising computer instructions, and the one or more processors are configured to invoke the computer instructions to enable the base station to perform the above method in the second node. BRIEF DESCRIPTION OF DRAWINGS

[0069] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments thereof, read in conjunction with the accompanying drawings:

[0070] Fig. 1 illustrates a transmission flow chart in a first node according to an embodiment of the present application;

[0071] FIG. 2 illustrates a schematic diagram of a network architecture, according to an embodiment of the present application;

[0072] FIG. 3 illustrates a schematic diagram of a radio protocol architecture for the user and control planes, according to an embodiment of the present application;

[0073] FIG. 4 illustrates a schematic diagram of hardware modules of a communication device, according to an embodiment of the present application;

[0074] FIG. 5 illustrates a flow diagram of a wireless signal transmission between a first node and a second node, according to an embodiment of the present application;

[0075] FIG. 6 illustrates a schematic diagram of transmission of on-demand SSB, according to an embodiment of the present application;

[0076] FIG. 7 illustrates a schematic diagram of first signaling and a first time window, according to an embodiment of the present application;

[0077] FIG. 8 illustrates a flow diagram of a wireless signal transmission between a first node and a second node, according to an embodiment of the present application;

[0078] FIG. 9 illustrates a schematic diagram of a relationship between a first time, a first time window and a second time window, according to an embodiment of the present application;

[0079] FIG. 10 illustrates a schematic diagram of a relationship between a first time and a first time window, according to an embodiment of the present application;

[0080] FIG. 11 illustrates a block diagram of a structure of a processing device in a first node, according to an embodiment of the present application;

[0081] FIG. 12 illustrates a block diagram of a structure of a processing device in a second node, according to an embodiment of the present application. DETAILED DESCRIPTION

[0082] 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 combined with each other arbitrarily without conflict.

[0083] Embodiment 1

[0084] Embodiment 1 illustrates a transmission flow diagram in a first node, according to an embodiment of the present application, as shown in FIG. 1.

[0085] In embodiment 1, a first node 100 receives, in step 101, first signaling indicating transmission of on-demand SSB in a first cell; performs, in step 102, beam-related measurement for the first cell in a first time window; wherein the first cell is a SCell, the beam-related measurement comprises at least one of beam failure detection or candidate beam detection; a duration of the first time window depends on the transmission of on-demand SSB; a reference signal employed by the beam-related measurement comprises the on-demand SSB.

[0086] As one embodiment, the first signaling is received on a serving cell of the first node.

[0087] As one embodiment, the first signaling is received on the first cell; wherein the first cell is activated at the time of receiving the first signaling, the first cell is the serving cell of the first node.

[0088] As one embodiment, the first cell is a SCell of the first node.

[0089] As one embodiment, the first cell is an on-demand SSB SCell.

[0090] As one embodiment, the first signaling is received in the second cell; wherein the second cell is the serving cell of the first node.

[0091] As one embodiment, the first signaling received on the second cell indicates the transmission of on-demand SSB in the first cell.

[0092] As one sub-embodiment of the above embodiment, the first cell is activated at the time of receiving the first signaling.

[0093] As one sub-embodiment of the above embodiment, the first cell is deactivated at the time of receiving the first signaling.

[0094] As one embodiment, the second cell is a SpCell (Special Cell) of the first node.

[0095] As one embodiment, the second cell is a PCell (Primary Cell) of the first node.

[0096] As one embodiment, the second cell is a PSCell (Primary Secondary Cell) of the first node.

[0097] As one embodiment, the first cell is configured by an SCellConfig field, which indicates a secondary cell index (SCellIndex) of the first cell.

[0098] As one embodiment, the on-demand SSB is a cell-defining SSB (CD-SSB).

[0099] As one embodiment, the on-demand SSB is a non-cell-defining SSB (NCD-SSB).

[0100] As one embodiment, the on-demand SSB is located on a synchronization raster.

[0101] As one embodiment, the on-demand SSB is not located on a synchronization raster.

[0102] As one embodiment, the first signaling is RRC (Radio Resource Control) layer signaling.

[0103] As one embodiment, the first signaling is an RRC message.

[0104] As one embodiment, the first signaling includes part or all of an IE (Information Element) RRCReconfiguration in the RRC message.

[0105] As one embodiment, the first signaling includes part or all of an IE RRCResume in the RRC message.

[0106] As one embodiment, the first signaling includes part or all of an IE CellGroupConfig in the RRC message.

[0107] As one embodiment, the first signaling includes part or all of an IE ServingCellConfigCommon in the RRC message.

[0108] As one embodiment, the first signaling includes part or all of an IE ServingCellConfigCommonSIB in the RRC message.

[0109] As one embodiment, the first signaling is RRC layer below protocol layer signaling.

[0110] As one embodiment, the first signaling is MAC CE (Control Element).

[0111] As one embodiment, the first signaling is a new MAC CE introduced in R19 (Release 19) or later.

[0112] As one embodiment, the first signaling is physical layer signaling.

[0113] As one embodiment, the first signaling is DCI (Downlink Control Information).

[0114] As one embodiment, the first signaling is UE-specific.

[0115] As one embodiment, the first signaling is group-common.

[0116] As one embodiment, the first signaling is cell-common.

[0117] As one embodiment, the first signaling is transmitted through DCCH (Dedicated Control Channel).

[0118] As one embodiment, the first signaling is transmitted through BCCH (Broadcast Control Channel).

[0119] As one embodiment, the first signaling is carried on SRB (Signalling Radio Bearer).

[0120] As one embodiment, the first signaling is transmitted through DL-SCH (Downlink Shared Channel).

[0121] As one embodiment, the first signaling is transmitted through BCH (Broadcast Channel).

[0122] As one embodiment, the first signaling is transmitted on PDSCH (Physical Downlink Shared Channel).

[0123] As an embodiment, the first signaling is transmitted on a PDCCH (Physical Control Shared Channel).

[0124] As an embodiment, the first signaling is transmitted on a PBCH (Physical broadcast channel).

[0125] As an embodiment, the first node is configured the at least one on-demand SSB configuration in the first cell.

[0126] As an embodiment, a first RRC signaling is received, the first RRC signaling configuring the at least one on-demand SSB configuration in the first cell.

[0127] As an embodiment, the first signaling comprises a first on-demand SSB configuration, the first on-demand SSB configuration belonging to the at least one on-demand SSB configuration; wherein the first signaling is a RRC layer below protocol layer signaling.

[0128] As an embodiment, one on-demand SSB configuration is associated with one on-demand SSB configuration index.

[0129] As an embodiment, the first signaling comprises one on-demand SSB configuration index.

[0130] As an embodiment, the first signaling comprises a first on-demand SSB configuration index, the first on-demand SSB configuration index associating the first on-demand SSB configuration; wherein the first signaling is a RRC layer below protocol layer signaling.

[0131] As an embodiment, the first signaling comprises a first identity.

[0132] As a sub-embodiment of the above embodiment, the first identity is a physical cell identity (PCI) of the first cell.

[0133] As a sub-embodiment of the above sub-embodiment, the first identity is an additional physical cell identity of the first cell.

[0134] As a sub-embodiment of the above embodiment, the first identity is a secondary cell index of the first cell.

[0135] As an embodiment, the first signaling indicating the transmission of the on-demand SSB in the first cell comprises: the first signaling indicating a frequency of the on-demand SSB.

[0136] As one subembodiment of the above embodiment, the first signaling comprises an ssb-frequency (SSB frequency) field, the ssb-frequency field indicating the frequency of the on-demand SSB.

[0137] As one subembodiment of the above embodiment, the first signaling comprises an absoluteFrequencySSB (absolute frequency SSB) field, the absoluteFrequencySSB indicating the frequency of the on-demand SSB.

[0138] As one embodiment, the first signaling indicating the transmission of the on-demand SSB in the first cell comprises: the first signaling indicating a subcarrier spacing (SCS) of the on-demand SSB.

[0139] As one subembodiment of the above embodiment, the first signaling comprises an ssbSubcarrierSpacing (SSB subcarrier spacing) field, the ssbSubcarrierSpacing indicating the subcarrier spacing of the on-demand SSB.

[0140] As one subembodiment of the above embodiment, the first signaling comprises a subcarrierSpacing (subcarrier spacing) field, the subcarrierSpacing indicating the subcarrier spacing of the on-demand SSB.

[0141] As one embodiment, the first signaling indicating the transmission of the on-demand SSB in the first cell comprises: the first signaling indicating a transmission power of the on-demand SSB.

[0142] As one subembodiment of the above embodiment, the first signaling comprises an ss-PBCH-BlockPower (synchronization signal physical broadcast channel block power) field, the ss-PBCH-BlockPower field indicating the transmission power of the on-demand SSB.

[0143] As one embodiment, the first node is configured a plurality of candidate values of the transmission power of the on-demand SSB, the first signaling indicating one of the plurality of candidate values of the transmission power of the on-demand SSB.

[0144] As one embodiment, the first signaling indicating the transmission of the on-demand SSBs in the first cell comprises: the first signaling indicating on-demand SSB positions within an on-demand SSB burst.

[0145] As one sub-embodiment of the above embodiment, the first signaling comprises a ssb-PositionsInBurst field, the ssb-PositionsInBurst field indicating the on-demand SSB positions within an on-demand SSB burst.

[0146] As one embodiment, the on-demand SSB positions comprise a bitmap, a bit of the bitmap corresponding to the on-demand SSBs having a value of 1.

[0147] As one embodiment, the first node is configured a plurality of candidate values of the on-demand SSB positions, the first signaling indicating one of the plurality of candidate values of the on-demand SSB positions.

[0148] As one embodiment, the first signaling indicating the transmission of the on-demand SSBs in the first cell comprises: the first signaling indicating a transmission periodicity of the on-demand SSBs.

[0149] As one sub-embodiment of the above embodiment, the first signaling comprises a ssb-periodicity field, the ssb-periodicity field indicating the transmission periodicity of the on-demand SSBs.

[0150] As one sub-embodiment of the above embodiment, the first signaling comprises a ssb-periodicityServingCell field, the ssb-periodicityServingCell field indicating the transmission periodicity of the on-demand SSBs.

[0151] As one embodiment, the first node is configured a plurality of candidate values of the transmission periodicity of the on-demand SSBs, the first signaling indicating one of the plurality of candidate values of the transmission periodicity of the on-demand SSBs.

[0152] As one embodiment, before receiving the first signaling, the first node is configured a first information set; the first information set comprising at least part of the frequency of the on-demand SSBs, the subcarrier spacing, the transmission power, the on-demand SSB positions, the transmission periodicity.

[0153] As one embodiment, the first signaling indicates a duration of the reception of the on-demand SSB burst.

[0154] As one embodiment, the transmission period of the on-demand SSB is the period of the on-demand SSB burst.

[0155] As one embodiment, the first signaling indicates the transmission of the on-demand SSB in the first cell comprises: the first signaling indicates a number of times of transmission of the on-demand SSB burst.

[0156] As one embodiment, the first signaling indicates the transmission of the on-demand SSB in the first cell comprises: the first signaling indicates the start time of the transmission of the on-demand SSB.

[0157] As one embodiment, the first signaling indicates the transmission of the on-demand SSB in the first cell comprises: the first signaling indicates the end time of the transmission of the on-demand SSB.

[0158] As one embodiment, the end time of the transmission of the on-demand SSB is indicated by signaling other than the first signaling.

[0159] As one embodiment, the beam-related measurement is for the beam failure detection.

[0160] As one embodiment, the beam-related measurement is for the beam failure recovery.

[0161] As one embodiment, the beam failure detection for the first cell is performed in the first time window.

[0162] As one embodiment, the candidate beam detection for the first cell is performed in the first time window; wherein the beam failure recovery is triggered in the first cell.

[0163] As one embodiment, the duration of the first time window depends on the transmission of the on-demand SSB comprises: the duration of the first time window is not greater than a time interval between the start time and the end time of the transmission of the on-demand SSB.

[0164] As one embodiment, the start time of the first time window is not earlier than the start time of the transmission of the on-demand SSB.

[0165] As one embodiment, the end time of the first time window is not later than the end time of the transmission of the on-demand SSB.

[0166] As one embodiment, the beam-related measurement is performed on an initial downlink bandwidth part (BWP) of the first cell.

[0167] As one embodiment, the beam-related measurement is performed on a BWP other than the initial downlink BWP of the first cell.

[0168] As one embodiment, the on-demand SSB is indicated by an SSB index (SSB-Index).

[0169] As one embodiment, the SSB index comprises an on-demand SSB index.

[0170] As one embodiment, the SSB index is an on-demand SSB index.

[0171] As one embodiment, the first reference signal is a CSI-RS.

[0172] As one embodiment, the first reference signal is a NZP (Non Zero Power) CSI-RS.

[0173] As one embodiment, the first node is configured with a NZP-CSI-RS-Resource IE, which configures the first reference signal.

[0174] As one embodiment, the first reference signal is indicated by a reference signal index.

[0175] As one embodiment, the reference signal index is a CSI-RS index.

[0176] As one embodiment, the reference signal index is a nzp-CSI-RS-Resource ID.

[0177] As one embodiment, the first reference signal is a single-port reference signal.

[0178] As one embodiment, the first reference signal is a two-port reference signal.

[0179] As one embodiment, the reference signal and the on-demand SSB are QCL Type D.

[0180] As one embodiment, the NZP-CSI-RS-Resource indicates a TCI state, which indicates that the first reference signal and the on-demand SSB are QCL Type D.

[0181] As one embodiment, the first node is configured with a RadioLinkMonitoringRS (Radio Link Monitoring RS) indicating one of the reference signals employed for the beam related measurements.

[0182] As one embodiment, the RadioLinkMonitoringRS includes a detectionResource (detection Resource) field.

[0183] As one embodiment, the detectionResource field indicates the SSB index of the on-demand SSB.

[0184] As one embodiment, the detectionResource field indicates the reference signal index of the first reference signal.

[0185] As one embodiment, the first node is configured with a RadioLinkMonitoringConfig (Radio Link Monitoring Config) indicating the RadioLinkMonitoringRS by a failureDetectionResourcesToAddModList (failure Detection Resources To Add Mod List) field included by the RadioLinkMonitoringConfig.

[0186] As one embodiment, the first node is configured with a BeamLinkMonitoringRS (Beam Link Monitoring RS) indicating one of the reference signals employed for the beam related measurements.

[0187] As one embodiment, the BeamLinkMonitoringRS includes a detectionResource (detection Resource) field.

[0188] As one embodiment, the detectionResource field indicates the SSB index of the on-demand SSB.

[0189] As one embodiment, the detectionResource field indicates the reference signal index of the first reference signal.

[0190] As one embodiment, the BeamLinkMonitoringRS is indicated by a bfdResourcesToAddModList (BFD Resources To Add Mod List) field included by a BeamFailureDetectionSet (Beam Failure Detection Set).

[0191] As an embodiment, the BeamFailureDetectionSet is indicated by a failureDetectionSet1 field or a failureDetectionSet2 field included in a BeamFailureDetection; wherein the BeamFailureDetection is indicated by a beamFailure field included in the RadioLinkMonitoringConfig.

[0192] As an embodiment, the first node is configured with a CandidateBeamRS, the CandidateBeamRS indicating one of the reference signals employed for the beam-related measurements.

[0193] As an embodiment, the CandidateBeamRS field indicates the on-demand SSB.

[0194] As an embodiment, the CandidateBeamRS field indicates the first reference signal.

[0195] As an embodiment, the CandidateBeamRS includes a ServCellIndex of the first cell.

[0196] As an embodiment, the CandidateBeamRS includes a candidateBeamConfig field, the candidateBeamConfig field indicating the SSB index of the on-demand SSB.

[0197] As an embodiment, the CandidateBeamRS includes a candidateBeamConfig field, the candidateBeamConfig field indicating the reference signal index of the first reference signal.

[0198] As one embodiment, the first node is configured with a BeamFailureRecoveryRSConfig; wherein the first node is configured with a BWP-DownlinkDedicated, which includes a beamFailureRecoverySCellConfig field, which indicates the BeamFailureRecoveryRSConfig.

[0199] As one embodiment, the CandidateBeamRS is indicated by a candidateBeamRS-List field included in the BeamFailureRecoveryRSConfig.

[0200] As one embodiment, the CandidateBeamRS is indicated by a candidateBeamRS-List2 field included in the BeamFailureRecoveryRSConfig.

[0201] Embodiment 2

[0202] Embodiment 2 illustrates a network architecture diagram according to one embodiment of the 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) / 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 shown, the 5GS / EPS provides packet-switched services, however, one of ordinary skill 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 NR NodeBs (gNBs) 203 and other gNBs 204. The gNBs 203 provide user and control plane protocol terminations toward the UEs 201. The gNBs 203 can be connected to other gNBs 204 via an Xn interface (e.g., backhaul link). The XnAP protocol of the Xn interface is used for the transport of control plane messages of the wireless network, and the user plane protocol of the Xn interface is used for the transport of user plane data. The gNBs 203 can also be referred to as base stations, base transceiver stations, radio base stations, radio transceivers, transceiver functions, basic service sets (BSSs), extended service sets (ESSs), TRPs (Transmission Reception Points), or some other suitable terminology, and in NTN (Non Terrestrial Network / satellite network) networks, the gNBs 203 can be satellites, aircrafts, or ground base stations that are relayed through satellites. The gNBs 203 provide the UEs 201 with access to the 5GC / EPC 210.Examples of UE 201 include cellular phones, smart phones, Session Initiation Protocol (SIP) phones, laptop computers, Personal Digital Assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, unmanned aerial vehicles, aerial vehicles, narrowband internet of things devices, machine type communication devices, land vehicles, automobiles, vehicular equipment, vehicular communication units, wearable devices, or any other similar functional device. Those skilled in the art will also recognize that a UE 201 can 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. The gNB 203 is connected by an S1 / NG interface to the 5GC / EPC 210. The 5GC / EPC 210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMF 214, S-GW (Service Gateway) / UPF (User Plane Function) 212, and P-GW (Packet Date Network Gateway) / UPF 213. The MME / AMF / SMF 211 is the control node that processes the signaling between UE 201 and 5GC / EPC 210. Generally, the MME / AMF / SMF 211 provides bearer and connection management. All user Internet Protocol (IP) 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 the Internet services 230. The Internet services 230 include operator's corresponding Internet Protocol services, which can specifically include the Internet, intranet, IMS (IP Multimedia Subsystem), and PS (Packet Switching) streaming services.

[0203] As one embodiment, the UE 201 corresponds to a first node in the present application.

[0204] As one embodiment, the gNB 203 corresponds to a second node in the present application.

[0205] As one embodiment, the UE 201 is a user equipment.

[0206] As one embodiment, the gNB 203 is a macro cell base station.

[0207] As one embodiment, the gNB 203 is a micro cell base station.

[0208] As one embodiment, the gNB 203 is a pico cell base station.

[0209] As one embodiment, the gNB 203 is a femto cell.

[0210] As one embodiment, the gNB 203 is a base station device supporting large latency difference.

[0211] As one embodiment, the gNB 203 is a flying platform device.

[0212] As one embodiment, the gNB 203 is a satellite device.

[0213] As one embodiment, the gNB 203 is a base station device supporting large latency difference.

[0214] As one embodiment, the gNB 203 is a test device (e.g. a transceiver simulating part of the functions of a base station, a signaling tester).

[0215] As one embodiment, the wireless link from the UE 201 to the gNB 203 is an uplink, and the uplink is used to perform uplink transmission.

[0216] As one embodiment, the wireless link from the UE 241 to the gNB 203 is an uplink, and the uplink is used to perform uplink transmission.

[0217] As one embodiment, the wireless link from the gNB 203 to the UE 201 is a downlink, and the downlink is used to perform downlink transmission.

[0218] As one embodiment, the wireless link from the gNB 203 to the UE 241 is a downlink, and the downlink is used to perform downlink transmission.

[0219] As one embodiment, the UE 201 and the gNB 203 are connected through a Uu air interface.

[0220] As one embodiment, the UE 241 and the gNB 203 are connected over a Uu air interface.

[0221] As one embodiment, the UE 201 and the UE 241 are connected over a PC5 air interface.

[0222] Embodiment 3

[0223] 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 as the PHY 301 herein. Layer 2 (L2 layer) 305 is above the PHY 301 and is responsible for the link between the UE and gNB by providing an unnumbered link to the upper layers. 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 for lost packets, and also provides duplicate packet detection and protocol error detection. The MAC sublayer 302 provides mapping between logical channels and transport channels, and also provides multiplexing of logical channels into transport channels. The MAC sublayer 302 is also responsible for allocating the various radio resources (e.g., resource blocks) within one cell to 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 a QoS flow and a data radio bearer to support the diversity of services. The radio protocol architecture in the user plane 350 of the UE can include the part 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 remote UE, a server, etc.).

[0224] As one embodiment, the PDCP 304 sends or receives data to or from the RLC 303 through an RLC channel.

[0225] As one embodiment, the PDCP 354 sends or receives data to or from the RLC 353 through an RLC channel.

[0226] As one embodiment, the RLC 303 sends or receives data to or from the MAC 302 through a logical channel.

[0227] As one embodiment, the RLC 353 sends or receives data to or from the MAC 352 through a logical channel.

[0228] As one embodiment, the MAC 302 sends or receives data to or from the PHY 301 through a transport channel.

[0229] As one embodiment, the MAC 352 sends or receives data to or from the PHY 351 through a transport channel.

[0230] As one embodiment, the wireless protocol architecture in FIG. 3 is applicable to the first node in the present application.

[0231] As one embodiment, the wireless protocol architecture in FIG. 3 is applicable to the second node in the present application.

[0232] As one embodiment, the first signaling in the present application is generated at the RRC 306.

[0233] As one embodiment, the first signaling in the present application is generated at the MAC 302 or the MAC 352.

[0234] As one embodiment, the first signaling in the present application is generated at the PHY 301 or the MAC 351.

[0235] As one embodiment, the second signaling in the present application is generated at the MAC 302 or the MAC 352.

[0236] As one embodiment, the L2 layer 305 or 355 belongs to a higher layer.

[0237] As one embodiment, the RRC sublayer 306 in the L3 layer belongs to a higher layer.

[0238] Embodiment 4

[0239] Embodiment 4 illustrates a hardware module diagram of a communication device according to one embodiment of the present application, as shown in FIG. 4. FIG. 4 is a block diagram of a first communication device 450 and a second communication device 410 that communicate with each other in an access network.

[0240] 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 multi-antenna transmit processor 457, a multi-antenna receive processor 458, a transmitter / receiver 454, and an antenna 452.

[0241] 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 multi-antenna receive processor 472, a multi-antenna transmit processor 471, a transmitter / receiver 418, and an antenna 420.

[0242] 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. The transmit processor 416 and the 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 FEC (Forward Error Correction) at the second communication device 410, and mapping of modulation symbols onto resource elements. 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 the subcarriers, multiplexes the stream with reference signals (e.g., pilot), and then performs an IFFT (Inverse Fast Fourier Transform) operation to generate a time domain multiplet carrier symbol stream for the physical channel. The multiple antenna transmit processor 471 then performs transmit analog pre-coding / beamforming operations on the time domain multiplet carrier symbol stream. Each transmitter 418 converts the baseband multiplet carrier symbol stream provided by the multiple antenna transmit processor 471 into a radio frequency stream and then provides it to a respective antenna 420.

[0243] 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 converts the RF stream into a baseband multicarrier symbol stream, which is provided to the receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 implement various signal processing functions of the Ll layer. The multi-antenna receive processor 458 performs receive analog precoding / beamforming operations on the baseband multicarrier symbol stream from the receivers 454. The receive processor 456 converts the baseband multicarrier symbol stream from the receive analog precoding / beamforming operations from the time domain to the frequency domain using a FFT (Fast Fourier Transform). In the frequency domain, the physical layer data signals and the reference signals are demultiplexed by the receive processor 456, where the reference signals will be used for channel estimation, and the data signals are recovered after multi-antenna detection in the multi-antenna receive 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 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 channels. The upper layer data and control signals are then provided to the controller / processor 459. The controller / processor 459 implements the functions of the L2 layer. The controller / processor 459 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 multiplexing 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.

[0244] 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.

[0245] 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.

[0246] 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 receive first signaling, the first signaling indicating transmission of on-demand SSBs in a first cell; perform, in a first time window, beam-related measurements for the first cell; wherein the first cell is a SCell, the beam-related measurements comprise at least one of beam failure detection or candidate beam detection; a duration of the first time window depends on the transmission of the on-demand SSBs; a reference signal employed by the beam-related measurements comprises the on-demand SSBs.

[0247] 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: receiving first signaling, the first signaling indicating transmission of on-demand SSBs in a first cell; performing, in a first time window, beam-related measurements for the first cell; wherein the first cell is a SCell, the beam-related measurements comprise at least one of beam failure detection or candidate beam detection; a duration of the first time window depends on the transmission of the on-demand SSBs; a reference signal employed by the beam-related measurements comprises the on-demand SSBs.

[0248] 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 transmit first signaling, the first signaling indicating transmission of on-demand SSBs in a first cell; wherein beam-related measurements for the first cell are performed in a first time window; the first cell is a SCell, the beam-related measurements comprise at least one of beam failure detection or candidate beam detection; a duration of the first time window depends on the transmission of the on-demand SSBs; a reference signal employed by the beam-related measurements comprises the on-demand SSBs.

[0249] As an embodiment, the second communication device 410 comprises: a memory storing a computer readable program, the computer readable program, when executed by at least one processor, produces actions comprising: sending first signaling, the first signaling indicating transmission of on-demand SSB in a first cell; wherein beam-related measurement for the first cell in a first time window is performed; the first cell is an SCell, the beam-related measurement comprises at least one of beam failure detection or candidate beam detection; a duration of the first time window depends on the transmission of the on-demand SSB; a reference signal employed by the beam-related measurement comprises the on-demand SSB.

[0250] As an embodiment, the first communication device 450 corresponds to a first node in the present application.

[0251] As an embodiment, the second communication device 410 corresponds to a second node in the present application.

[0252] As an embodiment, the first communication device 450 is a user equipment.

[0253] As an embodiment, the first communication device 450 is a layer 3 relay node.

[0254] As an embodiment, the first communication device 450 is a RSU (Road Side Unit).

[0255] As an embodiment, the second communication device 410 is a base station.

[0256] As an embodiment, the second communication device 410 is a distributed unit of a base station.

[0257] As an embodiment, the second communication device 410 is a piece of code in a distributed unit of a base station.

[0258] 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 used to receive the first signaling in the present application.

[0259] 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 used to send the first signaling in the present application.

[0260] As one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, or the controller / processor 459 is configured to transmit the second signaling in the present application.

[0261] As one embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, or the controller / processor 475 is configured to receive the second signaling in the present application.

[0262] Embodiment 5

[0263] Embodiment 5 illustrates a flow chart of a wireless signal transmission procedure between a first node and a second node according to one embodiment of the present application, as shown in FIG. 5. In FIG. 5, the first node N51 and the second node N52 communicate through an air interface. It is specifically pointed out that the sequence in this example does not limit the sequence of signal transmission and implementation in the present application. In FIG. 5, the steps included in the dashed box F501 are optional.

[0264] For the first node N51, in step S511, a first signaling is received, the first signaling indicating transmission of on-demand SSB in a first cell; in step S512, a beam-related measurement for the first cell is performed in a first time window; in step S513, beam failure recovery is triggered.

[0265] For the second node N52, in step S521, a first signaling is transmitted.

[0266] In embodiment 5, a first signaling is received, the first signaling indicating transmission of on-demand SSB in a first cell; a beam-related measurement for the first cell is performed in a first time window; wherein the first cell is an SCell, the beam-related measurement includes at least one of beam failure detection or candidate beam detection; a duration of the first time window depends on the transmission of the on-demand SSB; a reference signal employed by the beam-related measurement includes the on-demand SSB; a reference signal employed by the beam-related measurement includes a first reference signal, the first reference signal being associated to the on-demand SSB.

[0267] As one embodiment, the first signaling is transmitted and received through an air interface.

[0268] As one embodiment, the air interface is a Uu interface.

[0269] As one embodiment, the first node N51 is a UE.

[0270] As one embodiment, the first node N51 is a terminal.

[0271] As one embodiment, the first node N51 is the first node in the present application.

[0272] As one embodiment, the second node N52 is a base station.

[0273] As one embodiment, the second node N52 is a base station maintaining a serving cell of the first node N51.

[0274] As one embodiment, the second node N52 is a TRP (Transmit / Receive Point) of a serving cell of the first node N51.

[0275] As one embodiment, the second node N52 is a base station maintaining a master cell group (MCG) of the first node N51.

[0276] As one embodiment, the second node N52 is a base station maintaining a secondary cell group (SCG) of the first node N51.

[0277] As one embodiment, the second node N52 is a MgNB (Master gNB).

[0278] As one embodiment, the second node N52 is a SgNB (Secondary gNB).

[0279] As one embodiment, the second node N52 is the second node in the present application.

[0280] As one embodiment, the first signaling is received on the first cell, or the second cell.

[0281] As one embodiment, the reception on a cell means the reception through the air interface resource of a cell.

[0282] As one embodiment, the first cell and the second cell belong to the same cell group.

[0283] As one embodiment, the cell group is the master cell group.

[0284] As one embodiment, the cell group is the secondary cell group.

[0285] As one embodiment, the beam-related measurement includes the beam failure detection regardless of whether the beam failure recovery is triggered in the first cell within the first time window.

[0286] As one embodiment, the first cell is deactivated for at least part of the first time window, whether the first node performs the beam-related measurement for the at least part of time depends on implementation.

[0287] As one embodiment, the beam failure recovery is triggered at the first time in the first cell, the beam-related measurement performed after the start time of the first time window comprises the candidate beam detection; wherein the first time is before the start time of the first time window, and the beam failure recovery is not cancelled before the start time of the first time window.

[0288] As one embodiment, the beam failure recovery is triggered at the first time in the first cell, the beam-related measurement performed after the first time before the beam failure recovery is cancelled comprises the candidate beam detection; wherein the first time is within the first time window.

[0289] As one sub-embodiment of the two embodiments, the first cell is deactivated, the beam failure recovery is cancelled.

[0290] As one sub-embodiment of the two embodiments, the second signaling is sent, the beam failure recovery is cancelled.

[0291] Embodiment 6

[0292] Embodiment 6 illustrates a diagram of transmission of on-demand SSB according to one embodiment of the present application, as shown in FIG. 6. In FIG. 6, a rectangle without filling represents a time window, a grid line filled rectangle represents an on-demand SSB burst; the length of the rectangle does not represent the absolute time length in time domain.

[0293] In embodiment 6, the transmission of the on-demand SSB comprises transmitting a plurality of on-demand SSB bursts respectively in a plurality of on-demand transmission time windows; wherein the plurality of on-demand transmission time windows have the same duration; the plurality of on-demand transmission time windows and the plurality of on-demand SSB bursts are periodic; the first signaling indicates the period of the on-demand transmission time window or the period of the on-demand SSB burst.

[0294] As one embodiment, the transmission of the on-demand SSB comprises a plurality of on-demand transmission time windows with the same duration transmitted periodically, the on-demand transmission time window comprises a plurality of on-demand SSB bursts transmitted periodically.

[0295] As one embodiment, T1 in FIG. 6 represents the period of the on-demand SSB burst, the first signaling indicates the T1.

[0296] As an embodiment, T2 in FIG. 6 represents the period of the on-demand transmission time window, and the first signaling indicates the T2.

[0297] As an embodiment, the T2 is greater than the duration of the on-demand transmission time window, and the duration of the on-demand transmission time window is greater than the T1.

[0298] As an embodiment, the duration of the on-demand transmission time window is a positive integer multiple of the T1.

[0299] As an embodiment, the duration of the on-demand transmission time window is a product of both the T1 and the number of the multiple on-demand SSB bursts included in the on-demand transmission time window.

[0300] As an embodiment, the duration of the first time window is a positive integer multiple of the T2.

[0301] As an embodiment, the duration of the first time window is a product of both the T2 and the number of the multiple on-demand transmission time windows.

[0302] As an embodiment, the first signaling indicates the number of the multiple on-demand transmission time windows and the number of the multiple on-demand SSB bursts.

[0303] As an embodiment, the first signaling indicates the duration of the on-demand transmission time window.

[0304] As an embodiment, the first signaling indicates a gap of adjacent on-demand transmission time windows in the multiple on-demand transmission time windows.

[0305] As an embodiment, the gap of the adjacent on-demand transmission time windows is a time interval between the end time of a previous on-demand transmission time window and the start time of a next on-demand transmission time window.

[0306] As an embodiment, the start time of the on-demand transmission time window is a slot boundary of a first on-demand SSB time domain position in a first on-demand SSB burst included in the on-demand transmission time window.

[0307] As an embodiment, the start time of the on-demand transmission time window is a slot boundary of a first actually transmitted on-demand SSB time domain position in a first on-demand SSB burst included in the on-demand transmission time window.

[0308] As one embodiment, the end time of the on-demand transmission time window is a slot boundary of a last on-demand SSB time domain location in a last on-demand SSB burst included in the on-demand transmission time window.

[0309] As one embodiment, the end time of the on-demand transmission time window is a slot boundary of a last actually transmitted on-demand SSB time domain location in a last on-demand SSB burst included in the on-demand transmission time window.

[0310] As one embodiment, the end time of the on-demand transmission time window is the start time of the last on-demand SSB burst included in the on-demand transmission time window plus the periodicity of the on-demand SSB burst.

[0311] As one embodiment, the start time of the transmission of the on-demand SSB is the start time of a first on-demand transmission time window of the plurality of on-demand transmission time windows.

[0312] As one embodiment, the end time of the transmission of the on-demand SSB is the end time of a last on-demand transmission time window of the plurality of on-demand transmission time windows.

[0313] Embodiment 7

[0314] Embodiment 7 illustrates a diagram of a first signaling and a first time window according to one embodiment of the present application, as shown in FIG. 7. In FIG. 7, the length of a rectangle does not represent an absolute time length in time domain.

[0315] As one embodiment, the first signaling indicates a timing offset between the end of reception of the first signaling and the start time of the transmission of the on-demand SSB, as shown in timing offset in FIG. 7.

[0316] As one embodiment, the start time of the transmission of the on-demand SSB is equivalent to the start time of the first time window.

[0317] As one embodiment, the start time of the first time window is the end of reception of the first signaling plus the timing offset.

[0318] As one embodiment, the timing offset between the end of reception of the first signaling and the start time of the transmission of the on-demand SSB is greater than or equal to a first offset.

[0319] As one embodiment, the first signaling indicates the first offset.

[0320] As one embodiment, the first offset is configured.

[0321] As one embodiment, the first offset is predefined.

[0322] As one embodiment, the first offset is slots; wherein the denotes the number of slots within one subframe.

[0323] As one embodiment, the start time of the transmission of the on-demand SSB is not earlier than slot wherein the PDSCH carrying the first signaling ends at slot n, the PUCCH (Physical Uplink Control Channel) transmission carrying HARQ (Hybrid Automatic Repeat Request) -ACK (Acknowledgment) information for the PDSCH ends at slot n+m, the denotes the number of slots within one subframe.

[0324] Embodiment 8

[0325] Embodiment 8 illustrates yet another wireless signal transmission flowchart between a first node and a second node according to one embodiment of the present application, as shown in FIG. 8. In FIG. 8, the first node N81 and the second node N82 communicate over an air interface.

[0326] For the first node N81, in step S811, beam failure recovery is triggered; in step S812, a second signaling is transmitted.

[0327] For the second node N82, in step S821, a first signaling is received.

[0328] In embodiment 8, beam failure recovery is triggered at a first time instant in the first cell; a second signaling is transmitted, the second signaling indicating the beam failure recovery; wherein whether the second signaling indicates the on-demand SSB depends on a second time window; a start time of the second time window is the later one of the start time of the first time window and the first time instant; an end time of the second time window is a second time instant; the second time instant is within the first time window; the second time instant is indicated to generate the second signaling, or, a scheduling request for the second signaling is triggered.

[0329] As one embodiment, the second signaling is transmitted and received over the air interface.

[0330] As one embodiment, the first node N81 is a UE.

[0331] As one embodiment, the first node N81 is a terminal.

[0332] As one embodiment, the first node N81 is the first node in the present application.

[0333] As one embodiment, the second node N82 is a base station.

[0334] As one embodiment, the second node N82 maintains the first cell.

[0335] As one embodiment, the second node N82 is the second node in the present application.

[0336] As one embodiment, the second signaling is transmitted on the first cell.

[0337] As one embodiment, transmitting on a cell means transmitting through the air interface resources of a cell.

[0338] As one embodiment, as a response to triggering the beam failure recovery at the first time instant, the candidate beam evaluation is performed in the second time window.

[0339] As one embodiment, the candidate beam evaluation comprises at least measuring the on-demand SSB.

[0340] As one embodiment, the candidate beam evaluation comprises at least measuring the first reference signal.

[0341] As one embodiment, the first cell is active on the second time window.

[0342] As one embodiment, the second signaling is transmitted through UL-SCH.

[0343] As one embodiment, the second signaling is transmitted on PUSCH.

[0344] As one embodiment, at the second time instant, if UL-SCH (Uplink Shared Channel) resources are available for a new transmission, and if the UL-SCH resources can accommodate the second signaling and its subheaders, indicating a Multiplexing and Assembly procedure generates the second signaling.

[0345] As one embodiment, at the second time instant, if there are no UL-SCH resources available for a new transmission, triggering the scheduling request for the second signaling.

[0346] As one embodiment, the second signaling indicates the beam failure recovery comprises: the second signaling indicates that the beam failure is detected at the first cell.

[0347] As one embodiment, the second signaling is sent on the first cell.

[0348] As one embodiment, the second signaling is sent on the second cell.

[0349] As one embodiment, the second signaling is a BFR MAC CE.

[0350] As one embodiment, the second signaling is a Truncated BFR MAC CE.

[0351] As one embodiment, the second signaling is an Enhanced BFR MAC CE.

[0352] As one embodiment, the second signaling is a Truncated Enhanced BFR MAC CE.

[0353] As one embodiment, the second signaling indicates the beam failure recovery comprises: the second signaling indicates that the beam failure is detected at the first cell.

[0354] As one embodiment, the second signaling indicates the beam failure recovery comprises: the second signaling is accompanied by cancellation of the beam failure recovery.

[0355] As one embodiment, the second signaling includes the secondary cell identity of the first cell.

[0356] As one embodiment, whether the second signaling indicates a second reference signal depends on a second time window; wherein the second reference signal is one of the reference signals employed by the beam-related measurement.

[0357] As one sub-embodiment of the above embodiment, the second reference signal is the on-demand SSB.

[0358] As one sub-embodiment of the above embodiment, the second reference signal is the first reference signal.

[0359] As one embodiment, the second signaling includes an AC field, which indicates whether a candidate reference signal ID (Candidate RS ID) field exists.

[0360] As an embodiment, the second signaling comprises the candidate reference signal identification field; wherein the value of the AC field is 1.

[0361] As an embodiment, the second signaling indicates the on-demand SSB, the candidate reference signal identification field indicates the SSB index of the on-demand SSB.

[0362] As an embodiment, the second signaling indicates the first reference signal, the candidate reference signal identification field indicates the reference signal index of the first reference signal.

[0363] As an embodiment, the second signaling does not indicate the on-demand SSB, the second signaling does not comprise the candidate reference signal identification field indicating the SSB index of the on-demand SSB.

[0364] As an embodiment, the second signaling does not indicate the first reference signal, the second signaling does not comprise the candidate reference signal identification field indicating the reference signal index of the first reference signal.

[0365] As an embodiment, the candidate reference signal identification field indicates a reference signal other than the on-demand SSB and the first reference signal; wherein the value of the AC field is 1.

[0366] Embodiment 9

[0367] Embodiment 9 illustrates a relationship diagram of the first time instant, the first time window and the second time window according to an embodiment of the present application, as shown in FIG. 9. In FIG. 9, the length of the rectangle does not represent the absolute time length in the time domain.

[0368] In embodiment 9, the second signaling is sent, the second signaling indicates the beam failure recovery; wherein whether the second signaling indicates the on-demand SSB depends on a second time window; the start time of the second time window is the later one of the start time of the first time window and the first time instant; the end time of the second time window is a second time instant; the second time instant is within the first time window; the second signaling is generated at the second time instant, or, a scheduling request for the second signaling is triggered; when the second time window is less than a first evaluation requirement, the second signaling does not indicate the on-demand SSB; when the second time window is greater than or equal to the first evaluation requirement, whether the second signaling indicates the on-demand SSB further depends on a measurement result for the on-demand SSB in the second time window.

[0369] In case (a) of FIG. 9, the beam failure recovery is triggered within the first time window, the start time of the second time window is the first time instant, and the end time of the second time window is the second time instant.

[0370] In case (b) of FIG. 9, the beam failure recovery is triggered before the start time of the first time window, and the start time of the second time window is the start time of the first time window.

[0371] As one embodiment, the first time is not later than the end time of the first time window.

[0372] As one embodiment, a time between when the beam failure recovery is triggered and when the beam failure recovery is cancelled at least partially overlaps with the first time window.

[0373] As one embodiment, the second time window is a subset of the first time window in time domain.

[0374] As one embodiment, the second time window is a proper subset of the first time window in time domain.

[0375] As one embodiment, whether the second signaling indicates the on-demand SSB depends on the second time window comprises: when the second time window is less than the first evaluation requirement, the second signaling does not indicate the on-demand SSB.

[0376] As one embodiment, whether the second signaling indicates the first reference signal depends on the second time window comprises: when the second time window is less than the first evaluation requirement, the second signaling does not indicate the first reference signal.

[0377] As one embodiment, the second time window being less than the first evaluation requirement means that the duration of the second time window is less than the first evaluation requirement.

[0378] As one embodiment, when the second time window is less than the first evaluation requirement, the candidate beam evaluation for the on-demand SSB is not completed.

[0379] As one embodiment, when the second time window is less than the first evaluation requirement, the candidate beam evaluation for the first reference signal is not completed.

[0380] As one embodiment, whether the second signaling indicates the on-demand SSB depends on the second time window comprises: when the second time window is greater than or equal to the first evaluation requirement, whether the second signaling indicates the on-demand SSB further depends on the measurement result for the on-demand SSB in the second time window.

[0381] As one embodiment, the measurement result is RSRP (Reference Signal Received Power).

[0382] As one embodiment, the measurement result is L1-RSRP.

[0383] As one embodiment, the measurement result is unfiltered.

[0384] As one embodiment, the measurement result is layer one filtered.

[0385] As one embodiment, whether the second signaling indicates the first reference signal depends on the second time window.

[0386] As one embodiment, whether the second signaling indicates the first reference signal depends on the second time window comprises: when the second time window is greater than or equal to the first evaluation requirement, whether the second signaling indicates the first reference signal further depends on the measurement result for the first reference signal in the second time window.

[0387] As one embodiment, the second time window being greater than or equal to the first evaluation requirement comprises: the duration of the second time window being equal to the first evaluation requirement.

[0388] As one embodiment, the second time window being greater than or equal to the first evaluation requirement comprises: the duration of the second time window being greater than the first evaluation requirement.

[0389] As one embodiment, the second time window being greater than or equal to the first evaluation requirement comprises: at the second time, at least T ms is measured for the on-demand SSB; wherein the T is the first evaluation requirement.

[0390] As one embodiment, the second time window being greater than or equal to the first evaluation requirement comprises: at the second time, at least T ms is measured for the first reference signal; wherein the T is the first evaluation requirement.

[0391] As one embodiment, at the second time, the measurement result of at least one of the reference signals employed for the beam-related measurement becomes better than a second threshold over the last T ms period; wherein the T is the first evaluation requirement.

[0392] As an embodiment, whether the second signaling indicates the on-demand SSB further depends on that the measurement result for the on-demand SSB in the second time window comprises that at the second time instant, the measurement result for the first reference signal during the latest T ms becomes better than a second threshold; wherein the T is the first evaluation requirement.

[0393] As an embodiment, whether the second signaling indicates the first reference signal further depends on that the measurement result for the first reference signal in the second time window comprises that at the second time instant, the measurement result for the first reference signal during the latest T ms becomes better than a second threshold; wherein the T is the first evaluation requirement.

[0394] As an embodiment, the second threshold is Q in_LR .

[0395] As an embodiment, the first threshold depends on the type of the reference signal.

[0396] As an embodiment, the first node is configured with a BeamFailureRecoveryConfig.

[0397] As an embodiment, the BeamFailureRecoveryConfig indicates the second threshold.

[0398] As an embodiment, the second threshold is indicated by an rsrp-ThresholdBFR domain.

[0399] As an embodiment, the rsrp-ThresholdBFR domain is located in the BeamFailureRecoveryRSConfig.

[0400] As an embodiment, the BeamFailureRecoveryRSConfig indicates the rsrp-ThresholdBFR domain and the on-demand SSB simultaneously.

[0401] As an embodiment, the BeamFailureRecoveryRSConfig indicates the rsrp-ThresholdBFR domain and the first reference signal simultaneously.

[0402] As an embodiment, the first evaluation requirement depends on the period of the on-demand transmission time window or the period of the on-demand SSB burst.

[0403] As an embodiment, the first evaluation requirement is a multiple of the period of the on-demand transmission time window.

[0404] As an embodiment, the first evaluation requirement is a multiple of the period of the on-demand SSB burst.

[0405] As an embodiment, the first evaluation requirement is a multiple of the period of the first reference signal.

[0406] As an embodiment, the first evaluation requirement is T Evaluate_CBD_SSB .

[0407] As an embodiment, the first evaluation requirement is T Evaluate_CBD_CSI-RS .

[0408] As an embodiment, the unit of the first evaluation requirement is ms (millisecond).

[0409] As an embodiment, the first evaluation requirement is 25 ms.

[0410] As an embodiment, the first evaluation requirement is and a first variable; wherein, is a rounding up operation; parameter P, parameter N, parameter P CBD represents a scaling factor; the first evaluation requirement is applicable to the on-demand SSB.

[0411] As an embodiment, the value of the parameter P is specified in the protocol 38.133.

[0412] As an embodiment, the value of the parameter N is one of 1, 1.5, 4, 6, 8, 12.

[0413] As an embodiment, the value of the parameter R is 1.

[0414] As an embodiment, the value of the parameter R depends on the transmission of the on-demand SSB.

[0415] As an embodiment, the parameter R is equal to 1 / Y; wherein, the Y is the number of the multiple on-demand SSB bursts included in the on-demand transmission time window.

[0416] As an embodiment, the parameter R is equal to wherein, is a rounding up operation; the T0 is the duration of the on-demand transmission time window, the T1 is the period of the first reference signal.

[0417] As an embodiment, the parameter R is equal to wherein, is a floor operation; T0 is the duration of the on-demand transmission time window, and T1 is the periodicity of the first reference signal.

[0418] As one embodiment, the first variable is the periodicity of the on-demand SSB burst.

[0419] As one embodiment, the first variable is the periodicity of the on-demand transmission time window.

[0420] As one embodiment, the first variable is the DRX cycle.

[0421] As one embodiment, the first node is not activated DRX (Discontinuous reception).

[0422] As one embodiment, the first node is activated DRX and the DRX cycle is greater than 320ms.

[0423] As one embodiment, the first node is activated DRX and the DRX cycle is less than or equal to 320ms.

[0424] As one embodiment, the first variable is the larger one of the periodicity of the on-demand SSB burst and the DRX cycle.

[0425] As one embodiment, the first variable is the larger one of the periodicity of the on-demand transmission time window and the DRX cycle.

[0426] As one embodiment, the parameter P CBD has a value of the number of bands on which the UE performs the beam failure detection for the first cell.

[0427] As one embodiment, the parameter P CBD has a value of the number of bands on which the UE performs the beam failure detection for the first cell multiplied by 2.

[0428] As one embodiment, the first evaluation requirement is the larger one of 25ms and the product of the first variable; wherein, is a ceiling operation; the parameter P, the parameter N, parameter P CBD represents a scaling factor; the first evaluation requirement applies to the on-demand SSB.

[0429] As one embodiment, the first evaluation requirement is the product of the first variable; wherein, is a ceiling operation; the parameter P, the parameter N, parameter MBFD , parameter P CBD represents a scaling factor; the parameter P, the parameter N, parameter P CBD are configured; the first evaluation requirement applies to the first reference signal.

[0430] As one embodiment, the parameter M CBD has a value of 3.

[0431] As one embodiment, the first variable is the period of the first reference signal.

[0432] As one embodiment, the first variable is the larger one of the period of the first reference signal and the DRX cycle.

[0433] As one embodiment, the first evaluation requirement is the larger one of 25 ms and the product of the parameter P and the first variable; wherein, is a ceiling operation; the parameter P, the parameter N, parameter M CBD , parameter P CBD represents a scaling factor; the first evaluation requirement applies to the first reference signal.

[0434] Embodiment 10

[0435] Embodiment 10 illustrates a diagram of the relationship between a first time instant and a first time window according to one embodiment of the present application, as shown in FIG. 10. In FIG. 10, the length of a rectangle does not represent the absolute time length in time domain.

[0436] In embodiment 10, a beam failure recovery is triggered at a first time instant in the first cell; the triggering of the beam failure recovery depends on a measurement result of the reference signal employed for the measurement related to the beam before the first time instant within the first time window; wherein the first time instant is within the first time window; a time interval from the start time of the first time window to the first time instant is greater than or equal to a second evaluation requirement.

[0437] As one embodiment, the beam failure recovery is triggered at the first time instant; wherein a first timer is running and not expired, and a value of a first counter is greater than or equal to a first counting threshold.

[0438] As one embodiment, the first counter is BFI_COUNTER (beam failure instance counter).

[0439] As one embodiment, the first counting threshold is beamFailureInstanceMaxCount (maximum number of beam failure instances).

[0440] As one embodiment, the first timer is beamFailureDetectionTimer.

[0441] As one embodiment, the first threshold and the expiry value of the first timer are configured by the RadioLinkMonitoringConfig.

[0442] As one embodiment, the first threshold and the expiry value of the first timer are configured by the BeamFailureDetectionSet.

[0443] As one embodiment, the value of the first counter at the first time instant is the first count threshold.

[0444] As one embodiment, the value of the first counter at the first time instant is greater than the first count threshold.

[0445] As one embodiment, the trigger of the beam failure recovery depends on the measurement results of the reference signals employed for the beam-related measurements within the first time window prior to the first time instant comprises that the count value of the first counter depends on the measurement results of the reference signals employed for the beam-related measurements within the first time window prior to the first time instant.

[0446] As one embodiment, the first node is configured two BFD-RS sets, the first reference signal set is one of the two BFD-RS sets.

[0447] As one embodiment, the first node is not configured two BFD-RS sets, the first reference signal set is all of the reference signals employed for the beam-related measurements.

[0448] As one embodiment, the first reference signal set comprises the on-demand SSB.

[0449] As one embodiment, the first reference signal set comprises the first reference signal.

[0450] As one embodiment, the first counter is incremented, the first timer is started or restarted when the measurement results for the first reference signal set in one beam failure detection are all greater than the first threshold.

[0451] As one embodiment, the first threshold is Q out_LR .

[0452] As one embodiment, the first threshold depends on the type of the reference signal.

[0453] As an embodiment, the first threshold is Q out_LR_SSB ; wherein the Q out_LR_SSB is applicable to the case that the reference signal is the on-demand SSB.

[0454] As a sub-embodiment of the above embodiment, the first threshold is derived from the assumed PDCCH transmission parameters listed in Table 8.5.2.1-1 in the protocol 38.133.

[0455] As an embodiment, the first threshold is Q out_LR_CSI-RS ; wherein the Q out_LR_SSB is applicable to the case that the reference signal is CSI-RS.

[0456] As a sub-embodiment of the above embodiment, the first threshold is derived from the assumed PDCCH transmission parameters listed in Table 8.5.3.1-1 in the protocol 38.133.

[0457] As an embodiment, the reference signals employed for the beam-related measurement only include two reference signals, namely reference signal #1 and reference signal #2; when the measurement result of the reference signal #1 is worse than the Q out_LR_SSB , and the measurement result of the reference signal #2 is worse than the Q out_LR_CSI-RS , the first counter is incremented by one, and the first timer is started or restarted; wherein the reference signal #1 is the on-demand SSB, and the reference signal #2 is the first reference signal.

[0458] As an embodiment, the first time window includes multiple measurements for the on-demand SSB before the first time instance.

[0459] As an embodiment, the first time window includes multiple measurements for the first reference signal before the first time instance.

[0460] As an embodiment, the measurement results of the multiple measurements for the on-demand SSB before the first time instance in the first time window are worse than the first threshold at least X1 times; wherein the X1 is the first counting threshold.

[0461] As an embodiment, the measurement results of the multiple measurements for the first reference signal before the first time instance in the first time window are worse than the first threshold at least X2 times; wherein the X2 is the first counting threshold.

[0462] As an embodiment, the unit of the second evaluation requirement is ms.

[0463] As an example, the second evaluation requirement is 50ms.

[0464] As an example, the time interval between the start time of the first time window and the first moment is greater than the second evaluation requirement.

[0465] As an example, the time interval between the start time of the first time window and the first moment is equal to the second evaluation requirement.

[0466] As an example, the second evaluation requirement depends on the period of the on-demand delivery time window or the period of the on-demand SSB burst.

[0467] As an example, the second evaluation requirement is a multiple of the period of the on-demand delivery time window.

[0468] As an example, the second evaluation requirement is a multiple of the cycle of the on-demand SSB burst.

[0469] As an example, the second evaluation requirement is a multiple of the period of the first reference signal.

[0470] As an example, the second evaluation requirement is T Evaluate_BFD_SSB .

[0471] As an example, the second evaluation requirement is T Evaluate_BFD_CSI-RS .

[0472] As an example, the second evaluation requirement is The product of the first variable and the second variable; where, It is an up-rounding operation; the parameters P, N, and R represent scaling factors; the second evaluation requirement applies to the on-demand SSB.

[0473] As an example, the second evaluation requirement is 50ms and the... The larger of the product of the first variable and the first variable; wherein, It is an up-rounding operation; the parameters P, N, and R represent scaling factors; the second evaluation requirement applies to the on-demand SSB.

[0474] As an example, the second evaluation requirement is 50ms and the... The larger of the product of the first variable and the first variable; wherein, It is an up-rounding operation; the parameters P, N, and R represent scaling factors; the second evaluation requirement applies to the on-demand SSB.

[0475] As an example, the second evaluation requirement is (50×K2)ms and the... The larger of the product of the first variable and the first variable; wherein, It is an up-rounding operation; the parameters P, N, and R represent scaling factors; the parameters K1 and K2 represent relaxation factors; the second evaluation requirement applies to the on-demand SSB.

[0476] As an example, K1 equals 2 and K2 equals 2.

[0477] As an example, K1 equals 4 and K2 equals 1.

[0478] As an example, the second evaluation requirement is The product of the first variable and the first variable; where, It is a round-up operation; the parameter P, the parameter N, the parameter M BFD Parameter P BFD The parameter R represents a scaling factor; the second evaluation requirement applies to the first reference signal.

[0479] As an example, the parameter M BFD The value is 10.

[0480] As an example, the parameter P BFD The value is 2.

[0481] As an example, the parameter P BFD The value is the number of frequency bands by which the UE performs the beam fault detection for the first cell.

[0482] As an example, the parameter P BFD The value is 2 times the number of frequency bands for which the UE performs the beam fault detection on the first cell.

[0483] As an example, the second evaluation requirement is 50ms and the... The larger of the product of the first variable and the first variable; wherein, It is a round-up operation; the parameter P, the parameter N, the parameter M BFD The parameter P BFD The parameter R represents a scaling factor; the second evaluation requirement applies to the first reference signal.

[0484] As an example, the second evaluation requirement is 50ms and the... The larger of the product of the first variable and the first variable; wherein, is a ceiling operation; the parameter P, the parameter N, the parameter M BFD , the parameter P BFD , the parameter R represents a scaling factor; the second evaluation requirement is applicable to the first reference signal.

[0485] As one embodiment, the second evaluation requirement is the larger one of (50 x K2) ms and the product of the first variable; wherein, is a ceiling operation; the parameter P, the parameter N, the parameter M BFD , the parameter P BFD , the parameter R represents a scaling factor; the parameter K1 and the parameter K2 represent relaxation factors; the second evaluation requirement is applicable to the first reference signal.

[0486] Embodiment 11

[0487] Embodiment 11 illustrates a structural block diagram of a processing apparatus in a first node according to one embodiment of the present application, as shown in FIG. 11.

[0488] In FIG. 11, the first node processing apparatus 1100 includes a first receiver 1101 and a first transmitter 1102; the first node 1100 is a terminal, or the first node 1100 is a UE.

[0489] In embodiment 11, the first receiver 1101 receives first signaling, the first signaling indicating transmission of on-demand SSBs in a first cell; performs beam-related measurement for the first cell in a first time window; wherein the first cell is an SCell, the beam-related measurement includes at least one of beam failure detection or candidate beam detection; a duration of the first time window depends on the transmission of the on-demand SSBs; a reference signal employed by the beam-related measurement includes the on-demand SSBs.

[0490] As one embodiment, the reference signal employed by the beam-related measurement includes a first reference signal, the first reference signal being associated to the on-demand SSBs.

[0491] As one embodiment, the transmission of the on-demand SSBs includes respectively transmitting a plurality of on-demand SSB bursts in a plurality of on-demand transmission time windows; wherein durations of the plurality of on-demand transmission time windows are identical; the plurality of on-demand transmission time windows and the plurality of on-demand SSB bursts are both periodic; the first signaling indicates a periodicity of the on-demand transmission time windows and a periodicity of the on-demand SSB bursts.

[0492] As one embodiment, the start time of the first time window is a start time of the transmission of the on-demand SSB, and the end time of the first time window is an end time of the transmission of the on-demand SSB.

[0493] As one embodiment, beam failure recovery is triggered at a first time instant in the first cell.

[0494] As one embodiment, beam failure recovery is triggered at a first time instant in the first cell; the first transmitter 1102 transmits second signaling, the second signaling indicating the beam failure recovery; wherein whether the second signaling indicates the on-demand SSB depends on a second time window; a start time of the second time window is later of the start time of the first time window and the first time instant; an end time of the second time window is a second time instant; the second time instant is within the first time window; the second signaling is indicated to be generated at the second time instant, or a scheduling request for the second signaling is triggered at the second time instant.

[0495] As one embodiment, the first transmitter 1102 transmits second signaling, the second signaling indicating the beam failure recovery; wherein whether the second signaling indicates the on-demand SSB depends on a second time window; a start time of the second time window is later of the start time of the first time window and the first time instant; an end time of the second time window is a second time instant; the second time instant is within the first time window; the second signaling is indicated to be generated at the second time instant, or a scheduling request for the second signaling is triggered at the second time instant; when the second time window is less than a second evaluation requirement, the second signaling does not indicate the on-demand SSB; when the second time window is greater than or equal to the second evaluation requirement, whether the second signaling indicates the on-demand SSB further depends on a measurement result of the on-demand SSB in the second time window.

[0496] As one embodiment, beam failure recovery is triggered at a first time instant in the first cell; the triggering of the beam failure recovery depends on a measurement result of the reference signal employed for the measurement of the beam-related measurement before the first time instant within the first time window; wherein the first time instant is within the first time window; a time interval from the start time of the first time window to the first time instant is greater than or equal to a first evaluation requirement.

[0497] As an embodiment, when the second time window is less than a second evaluation requirement, the second signaling does not indicate the on-demand SSB; when the second time window is greater than or equal to the second evaluation requirement, whether the second signaling indicates the on-demand SSB further depends on a measurement result for the on-demand SSB in the second time window; one evaluation requirement depends on the period of the on-demand transmission time window or the period of the on-demand SSB burst; wherein the evaluation requirement is the second evaluation requirement, or, the first evaluation requirement.

[0498] As an embodiment, the first node 1100 is the first node in the present application.

[0499] As an embodiment, the first receiver 1101 comprises at least one of the receiver 454 (including the antenna 452), the reception processor 456, the multi-antenna reception processor 458 or the controller / processor 459 in FIG. 4 of the present application.

[0500] As an embodiment, the first receiver 1101 comprises at least one of the receiver 454 (including the antenna 452), the reception processor 456, the multi-antenna reception processor 458 or the controller / processor 459 in FIG. 4 of the present application.

[0501] As an embodiment, the first transmitter 1102 comprises at least one of the transmitter 454 (including the antenna 452), the transmission processor 468, the multi-antenna transmission processor 457 or the controller / processor 459 in FIG. 4 of the present application.

[0502] As an embodiment, the first transmitter 1102 comprises at least one of the transmitter 454 (including the antenna 452), the transmission processor 468, the multi-antenna transmission processor 457 or the controller / processor 459 in FIG. 4 of the present application.

[0503] Embodiment 12

[0504] Embodiment 12 illustrates a structural block diagram of a processing device in a second node according to an embodiment of the present application, as shown in FIG. 12.

[0505] In FIG. 12, the second node processing device 1200 comprises a second receiver 1201 and a second transmitter 1202. The second node 1200 is a base station.

[0506] In embodiment 12, the first transmitter 1202 transmits first signaling, the first signaling indicating transmission of on-demand SSB in a first cell; wherein beam-related measurement for the first cell is performed in a first time window; the first cell is an SCell, the beam-related measurement including at least one of beam failure detection or candidate beam detection; a duration of the first time window depends on the transmission of the on-demand SSB; a reference signal employed by the beam-related measurement includes the on-demand SSB.

[0507] As one embodiment, the reference signal employed by the beam-related measurement includes a first reference signal, the first reference signal being associated to the on-demand SSB.

[0508] As one embodiment, the transmission of the on-demand SSB includes transmission of multiple on-demand SSB bursts respectively in multiple on-demand transmission time windows; wherein the multiple on-demand transmission time windows have a same duration; the multiple on-demand transmission time windows and the multiple on-demand SSB bursts are periodic; the first signaling indicates a periodicity of the on-demand transmission time windows and a periodicity of the on-demand SSB bursts.

[0509] As one embodiment, a start time of the first time window is a start time of the transmission of the on-demand SSB, an end time of the first time window is an end time of the transmission of the on-demand SSB.

[0510] As one embodiment, beam failure recovery is triggered at a first time instant in the first cell.

[0511] As one embodiment, beam failure recovery is triggered at a first time instant in the first cell; the second receiver 1201 receives second signaling; wherein the beam failure recovery is cancelled; whether the second signaling indicates the on-demand SSB depends on a second time window; a start time of the second time window is later of the start time of the first time window and the first time instant; an end time of the second time window is the second time instant; the second time instant is within the first time window; the second signaling is indicated to be generated at the second time instant, or a scheduling request for the second signaling is triggered.

[0512] As an embodiment, the second receiver 1201 receives second signaling, the second signaling indicating the beam failure recovery; wherein whether the second signaling indicates the on-demand SSB depends on a second time window; a start time of the second time window is later of the start time of the first time window and the first time; an end time of the second time window is a second time; the second time is within the first time window; the second signaling is indicated at the second time, or a scheduling request for the second signaling is triggered; when the second time window is less than a second evaluation requirement, the second signaling does not indicate the on-demand SSB; when the second time window is greater than or equal to the second evaluation requirement, whether the second signaling indicates the on-demand SSB further depends on a measurement result for the on-demand SSB in the second time window.

[0513] As an embodiment, a beam failure recovery is triggered at a first time in the first cell; the triggering of the beam failure recovery depends on a measurement result of the reference signal employed for the measurement of the beam related before the first time within a first time window; wherein the first time is within the first time window; a time interval from the start time of the first time window to the first time is greater than or equal to a first evaluation requirement.

[0514] As an embodiment, when the second time window is less than a second evaluation requirement, the second signaling does not indicate the on-demand SSB; when the second time window is greater than or equal to the second evaluation requirement, whether the second signaling indicates the on-demand SSB further depends on a measurement result for the on-demand SSB in the second time window; one evaluation requirement depends on the period of the on-demand transmission window or the period of the on-demand SSB burst; wherein the evaluation requirement is the second evaluation requirement, or the first evaluation requirement.

[0515] As an embodiment, the second node 1200 is the second node in the present application.

[0516] As an embodiment, the second receiver 1201 includes at least one of the receiver 418 (including the antenna 420), the reception processor 470, the multi-antenna reception processor 472 or the controller / processor 475 in the drawing 4 of the present application.

[0517] As an embodiment, the second receiver 1201 includes at least one of the receiver 418 (including the antenna 420), the reception processor 470, the multi-antenna reception processor 472 or the controller / processor 475 in the drawing 4 of the present application.

[0518] As one example, the second transmitter 1202 includes at least one of the transmitter 418 (including the antenna 420), the transmit processor 416, the multi-antenna transmit processor 471, and the controller / processor 475 in FIG. 4.

[0519] As one example, the second transmitter 1202 includes at least one of the transmitter 418 (including the antenna 420), the transmit processor 416, the multi-antenna transmit processor 471, and the controller / processor 475 in FIG. 4.

[0520] 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 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 the like. 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), a relay satellite, a satellite base station, an air base station, a test device such as a transceiver device simulating part of the function of a base station, a signaling tester, and the like.

[0521] Those skilled in the art should understand that the present application can be implemented by other specified forms without departing from the core or essential characteristics thereof. Therefore, the presently disclosed embodiments should in no way be considered as descriptive rather than limiting. The scope of the application is determined by the appended claims rather than the preceding description, and all modifications within the equivalent meaning and range of the claims are considered to be included therein.

Claims

1. A method in a first node used for wireless communication, characterized by, comprising: receiving first signaling, the first signaling indicating transmission of on-demand SSB in a first cell; performing, in a first time window, beam-related measurement for the first cell; wherein the first cell is an SCell, the beam-related measurement comprises at least one of beam failure detection or candidate beam detection; duration of the first time window depends on the transmission of the on-demand SSB; reference signal employed by the beam-related measurement comprises the on-demand SSB.

2. The method in the first node according to claim 1, characterized by, the reference signal employed by the beam-related measurement comprises a first reference signal, the first reference signal being associated to the on-demand SSB.

3. A method in a first node according to claim 1 or 2, characterized by, the transmission of the on-demand SSB comprises transmission of multiple on-demand SSB bursts respectively in multiple on-demand transmission time windows; wherein durations of the multiple on-demand transmission time windows are identical; the multiple on-demand transmission time windows and the multiple on-demand SSB bursts are both periodic; the first signaling indicates a periodicity of the on-demand transmission time windows and a periodicity of the on-demand SSB bursts.

4. A method in a first node according to any of claims 1 to 3, characterized by, a start time of the first time window is a start time of the transmission of the on-demand SSB, an end time of the first time window is an end time of the transmission of the on-demand SSB.

5. A method in a first node according to any of claims 4, characterised by, comprising: triggering, in the first cell, beam failure recovery at a first time instant.

6. A method in a first node according to claim 5, characterised by, comprising: transmitting second signaling, the second signaling indicating the beam failure recovery; wherein whether the second signaling indicates the on-demand SSB depends on a second time window; a start time of the second time window is later of the start time of the first time window and the first time instant; an end time of the second time window is a second time instant; the second time instant is within the first time window; the second signaling is generated at the second time instant, or, a scheduling request for the second signaling is triggered.

7. A method in a first node according to claim 6, characterized by, when the second time window is less than a first evaluation requirement, the second signaling does not indicate the on-demand SSB; when the second time window is greater than or equal to the first evaluation requirement, whether the second signaling indicates the on-demand SSB further depends on measurement result for the on-demand SSB in the second time window.

8. A method in a first node according to any of claims 5-7, characterized by, the triggering of the beam failure recovery depends on measurement result for the reference signal employed by the beam-related measurement before the first time instant within the first time window; wherein the first time instant is within the first time window; a time interval from the start time of the first time window to the first time instant is greater than or equal to a second evaluation requirement.

9. A method in a first node according to claim 7 or 8, characterized by, one evaluation requirement depends on the periodicity of the on-demand transmission time windows or the periodicity of the on-demand SSB bursts; wherein the evaluation requirement is the first evaluation requirement, or, the second evaluation requirement.

10. A terminal, comprising: one or more processors and memory; The memory is coupled with the one or more processors, and is configured to store computer program codes, the computer program codes comprising computer instructions, the one or more processors invoking the computer instructions to cause the terminal to perform the method in any one of claims 1-9.

11. A method in a second node used for wireless communication, characterized by, Comprising: sending first signaling, the first signaling indicating transmission of on-demand SSBs in a first cell; wherein beam-related measurement for the first cell is performed in a first time window; the first cell is an SCell, the beam-related measurement comprises at least one of beam failure detection or candidate beam detection; a duration of the first time window depends on the transmission of the on-demand SSBs; a reference signal employed by the beam-related measurement comprises the on-demand SSBs.

12. A method in a second node according to claim 11, characterised by, The reference signal employed by the beam-related measurement comprises a first reference signal, the first reference signal being associated to the on-demand SSBs.

13. A method in a second node according to claim 11 or 12, characterized by, The transmission of the on-demand SSBs comprises transmission of multiple on-demand SSB bursts respectively in multiple on-demand transmission time windows; wherein durations of the multiple on-demand transmission time windows are identical; the multiple on-demand transmission time windows and the multiple on-demand SSB bursts are both periodic; the first signaling indicates a periodicity of the on-demand transmission time windows and a periodicity of the on-demand SSB bursts.

14. A method in a second node according to any of claims 11-13, characterized by, A start time of the first time window is a start time of the transmission of the on-demand SSBs, and an end time of the first time window is an end time of the transmission of the on-demand SSBs.

15. A method in a second node according to any of claim 14, characterized by, Comprising: beam failure recovery is triggered in the first cell at a first time instant.

16. A method in a second node according to claim 15, characterised by, Comprising: receiving second signaling, the second signaling indicating the beam failure recovery; wherein whether the second signaling indicates the on-demand SSBs depends on a second time window; a start time of the second time window is later of the start time of the first time window and the first time instant; an end time of the second time window is a second time instant; the second time instant is within the first time window; the second signaling is generated at the second time instant, or, a scheduling request for the second signaling is triggered.

17. A method in a second node according to claim 16, characterised by, When the second time window is less than a first evaluation requirement, the second signaling does not indicate the on-demand SSBs; when the second time window is greater than or equal to the first evaluation requirement, whether the second signaling indicates the on-demand SSBs further depends on a measurement result for the on-demand SSBs in the second time window.

18. A method in a second node according to any of claims 15 - 17, characterized by, The triggering of the beam failure recovery depends on a measurement result for the reference signal employed by the beam-related measurement before the first time instant within the first time window; wherein the first time instant is within the first time window; a time interval from the start time of the first time window to the first time instant is greater than or equal to a second evaluation requirement.

19. A method in a second node according to claim 17 or 18, characterized by, One evaluation requirement depends on the periodicity of the on-demand transmission time windows or the periodicity of the on-demand SSB bursts; wherein the evaluation requirement is the first evaluation requirement, or, the second evaluation requirement.

20. A base station, comprising: The base station comprises one or more processors and a memory; 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 base station to perform the method according to any one of claims 11 to 19.

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