Method and device used in wireless communication

Abstract

The invention discloses a method and a device used in wireless communication. A first node receives a first signal, the first signal carries a first signaling, the first signaling indicates to be switched to a second cell, and the first signaling is a signaling of a protocol layer below an RRC layer; a second signal is sent, the second signal carries HARQ feedback, and the HARQ feedback indicates that the first signal is correctly received; wherein whether the second signal carries a first message depends on whether a first condition set for the second cell is satisfied; the first condition set comprises at least one of the condition that the channel quality of the first cell is not worse than a first threshold value and the condition that the channel quality of the second cell is worse than a second threshold value; the first cell is a serving cell of the first node, and the second cell is a switching candidate cell of the first node. According to the method and the device, the robustness of LTM switching is enhanced, a ping-pong effect or switching failure is avoided, and the network efficiency is improved.

Description

Technical Field

[0001] The present application relates to a method and a device in a wireless communication system, and more particularly to a method and a device for LTM cell switching in wireless communication. Background Art

[0002] The application scenarios of future wireless communication systems will become more and more diversified, and different application scenarios will put forward different performance requirements for the system. In order to meet the different performance requirements of various application scenarios, the 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) #72 plenary meeting decided to study the NR (New Radio) technology (or Fifth Generation, 5G). The NR WI (Work Item) was passed at the 3GPP RAN #75 plenary meeting, and the standardization work on NR began. The design of the 5G system of Release 15 has taken into account some major application scenarios. Subsequent versions will not only consider the enhancement of the 5G system architecture, but also further enhance vertical applications to provide more flexible service matching, more robust transmission and more consistent user experience.

[0003] Mobility enhancement is a key issue in the new air interface technology. Cell switching provides effective mobility support. In order to adapt to various application scenarios and meet different needs, 3GPP continues to evolve cell switching technology. At the 3GPP RAN#94e plenary meeting, it was decided to start WI standardization work on L1 / L2 (Layer 1 / Layer 2)-based cell switching technology. The design goal of L1 / L2-based cell switching, namely LTM (L1 / L2-triggeredmobility), is to achieve fast switching of UE service cells. Summary of the invention

[0004] The inventors have found through research that in the existing LTM trigger mechanism, after LTM is configured, the network sends an LTM switching command, and the UE (User Equipment) switches to the target cell according to the LTM switching command. Since the radio channel quality of the source cell and / or the target cell may change before receiving the LTM switching command, executing the LTM switching command to switch to the target cell at this time may cause a ping-pong effect or a switching failure. Therefore, it is necessary to enhance the existing LTM process.

[0005] In view of the above problems, the present application discloses a solution. If the leaving condition of the cell switching event is met when the LTM switching command is received, the network is indicated; if the LTM switching command is received again, the switching is performed, otherwise the source cell is retained. In the absence of conflict, the embodiments and features in the embodiments of the first node of the present application can be applied to the second node, and vice versa. In the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily. Further, although the original intention of the present application is for the Uu air interface, the present application can also be used for the PC5 air interface. Further, although the original intention of the present application is for LTM, the present application can also be used for conditional LTM or continuous LTM or SCPAC or CHO or CPC, etc., to achieve technical effects similar to LTM. Further, although the original intention of the present application is for the terrestrial network (Terrestrial Network, TN) scenario, the present application is also applicable to the communication scenario of the non-terrestrial network (Non-Terrestrial Network, NTN), and achieves technical effects similar to those in the TN scenario. Furthermore, although the original intention of this application is for terminal and base station scenarios, this application is also applicable to relays and base stations or terminals and relays, achieving similar technical effects in terminal and base station scenarios. In addition, the use of a unified solution for different scenarios (including but not limited to V2X (Vehicle-to-Everything, Internet of Vehicles) scenarios and terminal and base station communication scenarios) can also help reduce hardware complexity and costs. In particular, the interpretation of terms (Terminology), nouns, functions, and variables in this application (if not otherwise specified) can refer to the definitions in the 3GPP specification protocols TS36 series, TS38 series, and TS37 series.

[0006] The present application discloses a method in a first node used for wireless communication, characterized by comprising:

[0007] receiving a first signal, where the first signal carries a first signaling, where the first signaling indicates switching to a second cell, and where the first signaling is a protocol layer signaling below an RRC (Radio Resource Control) layer;

[0008] Sending a second signal, where the second signal carries HARQ (Hybrid Automatic Repeat Request) feedback, where the HARQ feedback indicates that the first signal is correctly received;

[0009] Whether the second signal carries the first message depends on whether a first set of conditions for the second cell is met; the first set of conditions includes at least one of the channel quality of the first cell being better than a first threshold and the channel quality of the second cell being worse than a second threshold; the first cell is a service cell of the first node, and the second cell is a switching candidate cell for the first node.

[0010] As an embodiment, the above method indicates cell switching through the first signaling.

[0011] As an embodiment, the first condition set is used to evaluate whether a leaving condition of a cell switching event is satisfied.

[0012] As an embodiment, the problem to be solved by the present application is: when the first signaling indicates a cell switching, if it is detected that the first condition set is satisfied, how to indicate to the network that the leaving condition of the cell switching event is satisfied.

[0013] As an embodiment, the solution of the present application is: by multiplexing the first message when the second signal carries the HARQ feedback, it is realized to indicate to the network that the leaving condition of the cell switching event is met.

[0014] As an embodiment, the above method has the advantage of saving signaling overhead.

[0015] As an embodiment, the above method has the advantage of being backward compatible.

[0016] As an embodiment, the above method has the advantage of being able to promptly indicate to the network that the leaving condition of the cell switching event is met.

[0017] As an embodiment, the first node is a terminal.

[0018] According to one aspect of the present application, the above method is characterized in that when the first condition set for the second cell is met, the second signal carries the first message; when the first condition set for the second cell is not met, the second signal does not carry the first message.

[0019] According to one aspect of the present application, the above method is characterized in that it includes:

[0020] In response to receiving the first signal, switching to the second cell;

[0021] The second signal does not carry the first message.

[0022] As an embodiment, whether to perform cell switching to the second cell is determined at least based on an evaluation result of whether the first condition set for the second cell is satisfied.

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

[0024] Starting a first time window in a first symbol after an end of transmission of the second signal;

[0025] Wherein, the second signal carries the first message.

[0026] As an embodiment, after indicating to the network that the leaving condition of the cell switching event is satisfied, the cell switching is suspended in the first time window.

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

[0028] Executing a first set of operations in the first time window;

[0029] Among them, the first operation set includes at least one of monitoring PDCCH (Physical Downlink Control Channel) on the first cell, monitoring PDCCH used to schedule the first cell, and sending PRACH (Physical Random Access Channel) on the first cell.

[0030] As an embodiment, in the first time window, the service cell of the first node is still the first cell and is not switched to the second cell.

[0031] According to one aspect of the present application, the above method is characterized in that it includes:

[0032] receiving a second signaling in the first time window, where the second signaling indicates switching to the second cell, and the second signaling is a protocol layer signaling below the RRC layer;

[0033] In response to receiving the second signaling, the first time window is stopped and switching is performed to the second cell.

[0034] As an embodiment, when the second signaling indicating switching to the second cell is received again within the first time window, the cell switching is performed immediately.

[0035] As an embodiment, the above method is beneficial to improving the robustness of LTM cell switching.

[0036] As an embodiment, the above method is helpful to avoid unnecessary switching due to fluctuation of layer 1 measurement results.

[0037] As an embodiment, the above method is helpful to avoid ping-pong effect or switching failure.

[0038] According to one aspect of the present application, the above method is characterized in that it includes:

[0039] Sending a first measurement report;

[0040] The first time window expires, and the first condition set for the second cell is met.

[0041] As an embodiment, the above method indicates to the network that the leaving condition of the cell switching event is satisfied by reporting the first measurement report. As an embodiment, the above method can timely indicate to the network the changing trend of the cell channel quality by reporting the first measurement report.

[0042] As an embodiment, the above method can allow the network to obtain more channel quality information by reporting the first measurement report.

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

[0044] receiving a first RRC signaling, wherein the first RRC signaling configures at least one handover candidate cell and at least one corresponding candidate configuration;

[0045] The at least one switching candidate cell includes the second cell.

[0046] According to one aspect of the present application, the above method is characterized in that the switching to the second cell includes: starting to apply the candidate configuration of the second cell.

[0047] The present application discloses a terminal, characterized in that it includes:

[0048] The terminal includes: one or more processors and a memory;

[0049] The memory is coupled to the one or more processors, and the memory is used to store computer program codes, where the computer program codes include computer instructions. The one or more processors call the computer instructions to enable the terminal to execute the above method in the first node.

[0050] As an embodiment, the terminal is a UE (User Equipment).

[0051] The present application discloses a method used in a second node of wireless communication, characterized by comprising:

[0052] Sending a first signal, where the first signal carries a first signaling, where the first signaling indicates switching to a second cell, and where the first signaling is a protocol layer signaling below the RRC layer;

[0053] receiving a second signal, where the second signal carries HARQ feedback, and the HARQ feedback indicates that the first signal is correctly received;

[0054] Whether the second signal carries the first message depends on whether a first set of conditions for the second cell is met; the first set of conditions includes at least one of the channel quality of the first cell being better than a first threshold and the channel quality of the second cell being worse than a second threshold; the first cell is a serving cell of a receiver of the first signal, and the second cell is a switching candidate cell for the receiver of the first signal.

[0055] As an embodiment, the second node is a base station.

[0056] As an embodiment, the receiver of the first signal is the first node in the present application.

[0057] According to one aspect of the present application, the above method is characterized in that when the first condition set for the second cell is met, the second signal carries the first message; when the first condition set for the second cell is not met, the second signal does not carry the first message.

[0058] According to one aspect of the present application, the above method is characterized in that, in response to the first signal being received, the receiver of the first signal switches to the second cell;

[0059] The second signal does not carry the first message.

[0060] According to one aspect of the present application, the above method is characterized in that the first time window is started in the first symbol after the transmission of the second signal ends;

[0061] Wherein, the second signal carries the first message.

[0062] According to one aspect of the present application, the above method is characterized in that a first set of operations is executed in the first time window;

[0063] The first operation set includes at least one of monitoring PDCCH on the first cell, monitoring PDCCH used for scheduling the first cell, and sending PRACH on the first cell.

[0064] According to one aspect of the present application, the above method is characterized in that it includes:

[0065] Sending a second signaling in the first time window, where the second signaling indicates switching to the second cell, and the second signaling is a protocol layer signaling below the RRC layer;

[0066] In which, as a response to the second signaling being received, the first time window is stopped, and the receiver of the first signal is switched to the second cell.

[0067] As an embodiment, the recipient of the second signaling is the recipient of the first signal.

[0068] According to one aspect of the present application, the above method is characterized in that it includes:

[0069] receiving a first measurement report;

[0070] The first time window expires, and the first condition set for the second cell is met.

[0071] According to one aspect of the present application, the above method is characterized in that it includes:

[0072] Sending a first RRC signaling, wherein the first RRC signaling configures at least one handover candidate cell and at least one corresponding candidate configuration;

[0073] The at least one switching candidate cell includes the second cell.

[0074] According to one aspect of the present application, the above method is characterized in that the receiver of the first signal switches to the second cell, including: the candidate configuration of the second cell begins to be applied.

[0075] The present application discloses a base station, characterized in that it includes:

[0076] The base station includes: one or more processors and a memory;

[0077] The memory is coupled to the one or more processors, and the memory is used to store computer program codes, where the computer program codes include computer instructions, and the one or more processors call the computer instructions to enable the base station to execute the above method in the second node. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0079] Figure 1 An example of a transmission flow chart in a first node according to an embodiment of the present application is provided;

[0080] Figure 2 A schematic diagram illustrating a network architecture according to an embodiment of the present application is illustrated;

[0081] Figure 3 A schematic diagram illustrating a wireless protocol architecture of a user plane and a control plane according to an embodiment of the present application;

[0082] Figure 4 A hardware module schematic diagram of a communication device according to an embodiment of the present application is illustrated;

[0083] Figure 5 An example of a wireless signal transmission flow chart between a first node and a second node according to an embodiment of the present application is provided;

[0084] Figure 6 Another wireless signal transmission flow chart between a first node and a second node according to an embodiment of the present application is illustrated.

[0085] Figure 7 An example of a signal processing flow chart in a first node according to an embodiment of the present application is provided;

[0086] Figure 8 A schematic diagram illustrating the relationship between the second signal and the first time window according to an embodiment of the present application is illustrated;

[0087] Fig. 9 A schematic diagram illustrating the relationship between a second signal, a second signaling and a first time window according to an embodiment of the present application is illustrated;

[0088] Fig.10 A schematic diagram illustrating the relationship between a second signal, a first measurement report and a first time window according to an embodiment of the present application is illustrated;

[0089] Fig.11 An example structural block diagram of a processing device in a first node according to an embodiment of the present application is shown;

[0090] Fig.12 The structural block diagram of the processing device in the second node according to an embodiment of the present application is illustrated. DETAILED DESCRIPTION

[0091] The technical solution of the present application will be further described in detail below in conjunction with the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.

[0092] Example 1

[0093] Embodiment 1 illustrates a transmission flow chart in a first node according to an embodiment of the present application, as shown in the attached figure. Figure 1 shown.

[0094] In embodiment 1, the first node 100 receives a first signal in step 101, the first signal carries a first signaling, the first signaling indicates switching to a second cell, and the first signaling is a protocol layer signaling below the RRC layer; sends a second signal in step 102, the second signal carries HARQ feedback, and the HARQ feedback indicates that the first signal is correctly received; wherein, whether the second signal carries the first message depends on whether a first condition set for the second cell is met; the first condition set includes at least one of the channel quality of the first cell being better than a first threshold and the channel quality of the second cell being worse than a second threshold; the first cell is a serving cell of the first node, and the second cell is a candidate cell for switching of the first node.

[0095] As an embodiment, the first signal is received on a service cell of the first node.

[0096] As an embodiment, the first signal is PDCCH.

[0097] As an embodiment, the first signal is sent via PDCCH.

[0098] As an embodiment, the first signal is PDSCH (Physical Downlink Shared Channel).

[0099] As an embodiment, the first signal is sent via PDSCH.

[0100] As an embodiment, the first signal carrying the first signaling includes: the first signal carries a first transport block (Transport Block, TB), and the first transport block includes the first signaling.

[0101] As a sub-embodiment of the above embodiment, the first transmission block carries a first MAC (Medium Access Control) PDU (Physical Data Unit), and the first MAC PDU includes at least one MAC subPDU(s) (sub-protocol data unit).

[0102] As a sub-embodiment of the above embodiment, one of the at least one MAC subPDU(s) carries the first signaling.

[0103] As an embodiment, the first signaling is physical layer signaling.

[0104] As an embodiment, the first signaling is DCI (Downlink Control Information).

[0105] As an embodiment, the first signaling is MAC CE (Control Element).

[0106] As an embodiment, the first signaling is a LTM cell switch command (LTM Cell Switch Command) MAC CE.

[0107] As an embodiment, the first signaling instructs the first node to perform a cell handover to the second cell.

[0108] As an embodiment, the first signaling instructs the first node to switch from the first cell to the second cell.

[0109] As an embodiment, the first signaling includes a target configuration identifier (Target Configuration ID) field, and the target configuration identifier field indicates the second cell.

[0110] As an embodiment, the target configuration identification field indicates an index of the candidate configuration for the second cell.

[0111] As an embodiment, the first cell is a SpCell (Special Cell) of the first node.

[0112] As an embodiment, the first cell is a PCell (Primary Cell) of the first node.

[0113] As an embodiment, the first cell is a source cell of cell switching.

[0114] As an embodiment, the second cell is a target cell of cell switching.

[0115] As an embodiment, the second cell is a neighboring cell.

[0116] As an embodiment, the second cell is an SCell (Secondary Cell) of the first node.

[0117] As an embodiment, the second cell is a candidate cell for cell switching.

[0118] As an embodiment, the second cell is an LTM candidate cell.

[0119] As an embodiment, the first cell and the second cell belong to the same gNB-DU (Distributed Unit).

[0120] As an embodiment, the first cell and the second cell belong to different gNB-DUs.

[0121] As a sub-embodiment of the above embodiment, the different gNB-DUs belong to the same gNB-CU (Central Unit).

[0122] As a sub-embodiment of the above embodiment, the different gNB-DUs belong to different gNB-CUs.

[0123] As an embodiment, the first node sends the second signal as feedback for receiving the first signal.

[0124] As an embodiment, the second signal is sent on a service cell of the first node.

[0125] As an embodiment, the second signal is PUCCH (Physical Uplink Control Channel).

[0126] As an embodiment, the second signal is sent via PUCCH.

[0127] As an embodiment, the DCI that schedules the first signal indicates the time domain resources occupied by the second signal, and the first signal is received through the PDSCH.

[0128] As an embodiment, the frequency domain resources occupied by the second signal are configured.

[0129] As an embodiment, the PUCCH format is 0 or 1.

[0130] As an embodiment, the PUCCH format is 2 or 3 or 4.

[0131] As an embodiment, the second signal is PUSCH (Physical Uplink Shared Channel).

[0132] As an embodiment, the second signal is sent via PUSCH.

[0133] As an embodiment, the second signal carries UCI (Uplink Control Information).

[0134] As an embodiment, the second signal carries HARQ feedback, and the HARQ feedback is ACK (acknowledgement), indicating that the first signal is correctly received.

[0135] As an embodiment, whether the second signal carries the first message depends on whether the first condition set for the second cell is met.

[0136] As an embodiment, when the reception of the first signal ends or before the transmission of the second signal starts, it is evaluated whether the first condition set for the second cell is met.

[0137] As an embodiment, the first condition set includes a leaving condition for performing LTM cell switching.

[0138] As an embodiment, the first condition set for the second cell is configured by the base station.

[0139] As an embodiment, the first condition set for the second cell is configured by a maintaining base station of the first cell.

[0140] As an embodiment, the first RRC signaling indicates the first condition set through the candidate configuration for the second cell.

[0141] As an embodiment, the first node receives second RRC signaling in the first cell.

[0142] As a sub-embodiment of the above embodiment, the second RRC signaling and the first RRC signaling are the same signaling.

[0143] As a sub-embodiment of the above embodiment, the second RRC signaling and the first RRC signaling are different signalings.

[0144] As an embodiment, the second RRC signaling includes a MeasConfig (measurement configuration) field.

[0145] As an embodiment, the second RRC signaling includes a measObjectNR (NR measurement object) field.

[0146] As an embodiment, the second RRC signaling includes a reportConfigNR (NR reporting configuration) field.

[0147] As an embodiment, the second RRC signaling includes an EventTriggerConfig (event trigger configuration) field.

[0148] As an embodiment, the second RRC signaling includes a CondTriggerConfig (conditional trigger configuration) field.

[0149] As an embodiment, the EventTriggerConfig field or the CondTriggerConfig field included in the second RRC signaling configures the first condition set.

[0150] As an embodiment, the second RRC signaling includes a first field, and the first field indicates the first condition set.

[0151] As an embodiment, the name of the first domain includes LTM.

[0152] As an embodiment, the name of the first domain includes event.

[0153] As an embodiment, the name of the first domain includes cond or conditional.

[0154] As an embodiment, the name of the first domain includes leaving.

[0155] As an embodiment, the first condition set includes at least one condition.

[0156] As an embodiment, the first condition set being satisfied means that all conditions in the first condition set are satisfied.

[0157] As an embodiment, the first condition set not being met means that any condition in the first condition set is not met.

[0158] As an embodiment, the first condition set includes at least one of: the channel quality of the first cell is worse than a first threshold or the channel quality of the second cell is better than a second threshold.

[0159] As a sub-embodiment of the above embodiment, the first condition set is for a first time length.

[0160] As an embodiment, the first condition set includes at least one of: the channel quality of the first cell is worse than a first threshold within the first time length; or the channel quality of the second cell is better than a second threshold within the first time length.

[0161] As an embodiment, the first time length is the triggering time of the first message.

[0162] As an embodiment, the first time length is configured by the base station.

[0163] As an embodiment, the first time length is indicated by a TimeToTrigger (trigger time) field.

[0164] As an embodiment, the value of the first time length is 0.

[0165] As an embodiment, the value of the first time length is greater than 0.

[0166] As an embodiment, the first condition set includes a first condition, and the first condition is at least one of the channel quality of the first cell being better than the first threshold and the channel quality of the second cell being worse than the second threshold.

[0167] As an embodiment, the channel quality of the first cell is better than the channel quality of the second cell includes that the channel quality of the first cell is equal to the channel quality of the second cell.

[0168] As an embodiment, the first condition set includes a first condition, and the first condition is that the channel quality of the first cell is better than the first threshold.

[0169] As a sub-embodiment of the above embodiment, the first threshold is configurable.

[0170] As a sub-embodiment of the above embodiment, the first threshold is related to the channel quality of the second cell.

[0171] As a sub-embodiment of the above embodiment, the first threshold is the channel quality of the second cell.

[0172] As a sub-embodiment of the above embodiment, the first threshold is a value of the channel quality of the second cell after linear processing.

[0173] As a sub-embodiment of the above embodiment, the first threshold is the sum of the channel quality of the second cell and a first offset value, and the first offset value is configured.

[0174] As an embodiment, the channel quality of the first cell is better than the first threshold includes: the channel quality of the first cell is greater than the first threshold.

[0175] As an embodiment, the channel quality of the first cell is better than the first threshold, including: Mp>the first threshold; wherein, Mp is the channel quality of the first cell.

[0176] As a sub-embodiment of the above embodiment, the first threshold is Thresh1; wherein, Thresh1 is a threshold configured for an event.

[0177] As a sub-embodiment of the above embodiment, the first threshold is Thresh1+Hys; wherein, Hys is a hysteresis parameter configured for an event; and Thresh1 is a threshold configured for an event.

[0178] As an embodiment, the channel quality of the first cell is better than the first threshold, which includes: Mp>Mn; wherein, Mp is the channel quality of the first cell; the first threshold is Mn, and Mn is the channel quality of the second cell.

[0179] As an embodiment, the channel quality of the first cell is better than the first threshold value, including: Mp>Mn+the first offset value; wherein, Mp is the channel quality of the first cell; Mn is the channel quality of the second cell; and the first threshold value is the sum of the channel quality of the second cell and the first offset value.

[0180] As a sub-embodiment of the above embodiment, the first offset value is configurable.

[0181] Specifically, the first offset value is (Ofn+Ocn-Hys)-(Ofp+Ocp+Off); wherein, Ofn is a specific offset for the measurement object of the second cell; Ocn is a specific offset for the second cell; Hys is a configured hysteresis parameter for an event; Ofp is a specific offset for the measurement object of the first cell; Ocp is a specific offset for the first cell; and Off is a configured offset for an event.

[0182] As an embodiment, the first condition set includes a second condition, and the second condition is that the channel quality of the second cell is worse than the first threshold.

[0183] As a sub-embodiment of the above embodiment, the second threshold is configurable.

[0184] As a sub-embodiment of the above embodiment, the second threshold is related to the channel quality of the first cell.

[0185] As a sub-embodiment of the above embodiment, the second threshold is the channel quality of the first cell.

[0186] As a sub-embodiment of the above embodiment, the second threshold is a value of the channel quality of the first cell after linear processing.

[0187] As a sub-embodiment of the above embodiment, the second threshold is the difference between the channel quality of the first cell and a second offset value, and the second offset value is configured.

[0188] As an embodiment, the channel quality of the second cell is worse than the second threshold includes: the channel quality of the second cell is less than the second threshold.

[0189] As an embodiment, the channel quality of the second cell is worse than the second threshold, including: Mn<the second threshold; wherein Mn is the channel quality of the second cell.

[0190] As a sub-embodiment of the above embodiment, the second threshold is Thresh2, and Thresh2 is configurable.

[0191] As a sub-embodiment of the above embodiment, the second threshold is Thresh2-(Ofn+Ocn+Hys); wherein, Ofn is a specific offset of the measurement object for the second cell; Ocn is a specific offset for the second cell; Hys is a hysteresis parameter for an event, and Thresh2 is a configured threshold for an event.

[0192] As an example, that the channel quality of the second cell is worse than the second threshold includes: Mn < Mp; where Mn is the channel quality of the second cell; the second threshold is Mp, and Mp is the channel quality of the first cell.

[0193] As an example, that the channel quality of the second cell is better than the second threshold includes: Mn < Mp - the second offset value; where Mn is the channel quality of the second cell; Mp is the channel quality of the first cell; the second threshold is the difference between the channel quality of the first cell minus the second offset value.

[0194] As a sub - example of the above example, the second offset value is configured.

[0195] As a sub - example of the above example, the second offset value is the same as the first offset value.

[0196] As an example, the first condition set includes two conditions. The first condition of the two conditions is that the channel quality of the first cell is better than the first threshold; the second condition of the two conditions is that the channel quality of the second cell is worse than the second threshold.

[0197] As an example, the two conditions included in the first condition set are the first condition and the second condition respectively.

[0198] As a sub - example of the above example, the first threshold and the second threshold are configured respectively.

[0199] As a sub - example of the above example, the first threshold and the second threshold are absolute thresholds respectively.

[0200] As a sub - example of the above example, that the channel quality of the first cell is better than the first threshold includes: Mp > Thresh1; where Mp is the channel quality of the first cell; the first threshold is Thresh1, and Thresh1 is configured; that the channel quality of the second cell is worse than the second threshold includes: Mn < Thresh2; where Mn is the channel quality of the second cell; the second threshold is Thresh2, and Thresh2 is configured.

[0201] As a sub - embodiment of the above - mentioned embodiment, the channel quality of the first cell being better than the first threshold includes: Mp>Thresh1 + Hys; the channel quality of the second cell being worse than the second threshold includes: Mn<Thresh2-(Ofn + Ocn - Hys); where the channel quality of the first cell is Mp, the first threshold is Thresh1 - Hys, Hys is the hysteresis parameter for the event, and Thresh1 is configured; Mn is the channel quality of the second cell; Ofn is the specific offset for the measurement object of the second cell; Ocn is the specific offset for the second cell; and Thresh2 is configured.

[0202] As an embodiment, when Mp and Mn are RSRP (Reference Signal Received Power), the units of Mp and Mn are dBm (decibel - milliwatt); when Mp and Mn are RSRQ (Reference Signal Received Quality) or RS (Reference Signal) - SINR (Signal to Interference and Noise Ratio), the units of Mp and Mn are dB (decibel).

[0203] As an embodiment, the units of Ofn, Ocn, and Hys are dB.

[0204] As an embodiment, the units of Ofp, Ocp, and Off are dB.

[0205] As an embodiment, the unit of Thresh1 is the same as the unit of Mp.

[0206] As an embodiment, the unit of Thresh2 is the same as the unit of Mn.

[0207] As an embodiment, Ofn is configured by the base station.

[0208] As an embodiment, an offsetMO domain included in the measObjectNR field and corresponding to the second cell indicates Ofn.

[0209] As an embodiment, Ocn is configured by the base station.

[0210] As an embodiment, a cellIndividualOffset field for the second cell included in the measObjectNR field indicates the Ocn.

[0211] As an embodiment, the reportConfigNR field includes a cellIndividualOffset field for the second cell to indicate the Ocn.

[0212] As an embodiment, the Ocn is not configured and the value of Ocn is 0.

[0213] As an embodiment, the Ofp is configured by the base station.

[0214] As an embodiment, an offsetMO field for the first cell included in the measObjectNR field indicates the Ofp.

[0215] As an embodiment, the Ocp is configured by the base station.

[0216] As an embodiment, a cellIndividualOffset field for the first cell included in the measObjectNR field indicates the Ocp.

[0217] As an embodiment, a cellIndividualOffset field for the first cell included in the reportConfigNR field indicates the Ocp.

[0218] As an embodiment, the Ocp is not configured and the value of the Ocp is zero.

[0219] As an embodiment, the channel quality of a cell is based on measurements.

[0220] As an embodiment, the one cell is the first cell.

[0221] As an embodiment, the one cell is the second cell.

[0222] As an embodiment, the measurement is a physical layer measurement.

[0223] As an embodiment, the measurement is L1 (layer 1) measurement.

[0224] As an embodiment, the measurement is a beam level measurement.

[0225] As an embodiment, the measurement is a measurement of a reference signal of the one cell.

[0226] As an embodiment, the reference signal is CSI (Channel Status Information)-RS (Reference Signal).

[0227] As an embodiment, the reference signal is SSB (SS (Synchronization Signals) / PBCH (Physical Broadcast Channel) block).

[0228] As an embodiment, the channel quality of one cell is a result of L1 measurement value being subjected to L1 filtering.

[0229] As an embodiment, the channel quality of one cell is RSRP, or RSRQ, or RSSI (Received Signal Strength Indicator), or SINR.

[0230] As an embodiment, the channel quality of the first cell is obtained by measuring the first beam set on a first measurement gap set.

[0231] As an embodiment, the first beam set is used for transmission in the first cell.

[0232] As an embodiment, the first beam set includes at least one downlink beam.

[0233] As an embodiment, the first beam set includes only one downlink beam.

[0234] As an embodiment, any beam in the first beam set is associated with a reference signal of the first cell.

[0235] As an embodiment, the second RRC signaling indicates the first beam set.

[0236] As an embodiment, a third signaling is received, wherein the third signaling indicates the first beam set.

[0237] As an embodiment, the third signaling is protocol layer signaling below the RRC layer.

[0238] As an embodiment, the third signaling is PDCCH.

[0239] As an embodiment, the third signaling is MAC CE.

[0240] As an embodiment, the third signaling is TCI (Transmission Configuration Indicator) States Activation / Deactivation (TCI states activation / deactivation) MAC CE.

[0241] As an embodiment, the first beam set is a beam for sending PDCCH, the PDCCH schedules PDSCH, the PDSCH carries the second RRC signaling, and the first beam set includes only one beam.

[0242] As an embodiment, the first beam set is a beam for sending PDSCH, the PDSCH carries the second RRC signaling, and the first beam set includes one beam.

[0243] As an embodiment, the channel quality of the second cell is obtained by measuring the second beam set in a second measurement gap set.

[0244] As an embodiment, the second beam set is for transmission in the second cell.

[0245] As an embodiment, the second beam set is indicated by a maintaining base station of the first cell.

[0246] As an embodiment, the second beam set includes at least one downlink beam.

[0247] As an embodiment, the second beam set includes only one downlink beam.

[0248] As an embodiment, any beam in the second beam set is associated with a reference signal of the second cell.

[0249] As an embodiment, the second RRC signaling indicates the second beam set.

[0250] As an embodiment, the second RRC signaling includes a ltm-DL-OrJointTCI-StateToAddModList (LTM downlink - joint transmission configuration indication state add modification list) field, and the ltm-DL-OrJointTCI-StateToAddModList field includes at least one CandidateTCI-State (candidate transmission configuration indication state) field, and the at least one CandidateTCI-State field indicates at least one beam, and any beam in the second beam set belongs to the at least one beam.

[0251] As a sub-embodiment of the above two embodiments, the second RRC signaling indicates activation of the second beam set.

[0252] As a sub-embodiment of the above two embodiments, a MAC CE is received after receiving the second RRC signaling, and the one MAC CE indicates activation of the second beam set.

[0253] As an embodiment, the second RRC signaling configures a measurement gap set.

[0254] As an embodiment, the one measurement gap set is the first measurement gap set.

[0255] As an embodiment, the one measurement gap set is the second measurement gap set.

[0256] As an embodiment, the second RRC signaling includes a MeasGapConfig (measurement gap configuration) field, and the MeasGapConfig field includes at least a mgl (measurement gap length) field, a mgrp (measurement gap repetition number) field, a mgta (measurement gap timing advance) field and a gapOffset (gap offset) field to indicate the parameter configuration of a measurement gap in the measurement gap set.

[0257] As an embodiment, the second RRC signaling includes an associatedMeasGapSSB (associated SSB measurement gap) field, and the associatedMeasGapSSB field indicates an identifier of a measurement gap in the measurement gap set.

[0258] As an embodiment, the second RRC signaling includes an associatedMeasGapCSIRS (associated CSI-RS measurement gap) field, and the associatedMeasGapCSIRS field indicates an identifier of a measurement gap in the measurement gap set.

[0259] As an embodiment, when the first set of conditions for the second cell is met, the second signal carries the first message.

[0260] As an embodiment, the first message includes at least 1 bit.

[0261] As an embodiment, the first message includes X bits, where X is a positive integer.

[0262] As an embodiment, the first message is 1 bit; wherein X is equal to 1.

[0263] As a sub-embodiment of the above embodiment, the value of the first message is 1.

[0264] As a sub-embodiment of the above embodiment, the value of the first message is 0.

[0265] As an embodiment, the first message is used to indicate that the first set of conditions for the second cell is met.

[0266] As an embodiment, the first message is used to request the base station to indicate whether to continue switching to the second cell.

[0267] As an embodiment, the first message is a plurality of bits.

[0268] As an embodiment, the second signal carrying the first information includes: the second signal at least multiplexing the HARQ feedback and the first message.

[0269] As a sub-embodiment of the above embodiment, the second signal multiplexes only the HARQ feedback and the first message.

[0270] As a sub-embodiment of the above embodiment, the second signal multiplexes the HARQ feedback, SR (Scheduling Request), and the first message.

[0271] As a sub-embodiment of the above embodiment, the second signal multiplexes the HARQ feedback, CSI report, and the first message.

[0272] As a sub-embodiment of the above embodiment, the second signal multiplexes the HARQ feedback, the SR, the CSI report, and the first message.

[0273] As a sub-embodiment of the above embodiment, the second signal multiplexes the HARQ feedback, CG (Configured Grant)-UCI, and the first message.

[0274] As a sub-embodiment of the above embodiment, the second signal multiplexes the HARQ feedback, UTO (Unused Transmission Occasion)-UCI, and the first message.

[0275] As an embodiment, the second signal is generated based on a first UCI bit sequence, and the first UCI bit sequence at least includes the information bit of the HARQ feedback.

[0276] As an embodiment, the second signal carrying the first information includes: the first UCI bit sequence includes X bits included in the first message.

[0277] As an embodiment, the number of bits of the first UCI bit sequence is at least greater than 0. ACK Add the X; wherein the O ACK represents the number of bits included in the information bits of the HARQ feedback, and X represents the number of bits included in the first message.

[0278] As a sub-embodiment of the above embodiment, the information bits of the HARQ feedback are mapped to the first to the ninth bits included in the first UCI bit sequence. ACK bits.

[0279] As a sub-embodiment of the above embodiment, the bits included in the first message are mapped to the (Y+1)th to (Y+X)th bits included in the first UCI bit sequence.

[0280] As a subsidiary embodiment of the above sub-embodiment, the value of Y is greater than 0. ACK .

[0281] As an embodiment, the parameter uci-MuxWithDiffPrio (UCI with different priority multiplexing) is configured.

[0282] As an embodiment, the first UCI bit sequence is of high priority.

[0283] As a sub-embodiment of the above embodiment, the ACK Indicates the number of bits of the associated priority index (priority index) 1 included in the HARQ feedback.

[0284] As a sub-embodiment of the above embodiment, the first message is associated with a priority index of 1.

[0285] As an embodiment, the first UCI bit sequence is of low priority.

[0286] As a sub-embodiment of the above embodiment, the ACK Indicates the number of bits of the associated priority index 0 included in the HARQ feedback.

[0287] As a sub-embodiment of the above embodiment, the first message is associated with a priority index of 0.

[0288] As an embodiment, the first message and the HARQ feedback are used to generate a bit block, and the bit block is processed by the physical layer to generate the second signal.

[0289] As an embodiment, the first UCI bit sequence is used to generate the one bit block, which is then processed by the physical layer to generate the second signal.

[0290] As an embodiment, the generation of the bit block and the physical layer processing include: code block segmentation and CRC (Cyclic Redundancy Check) attachment; wherein the number of bits included in the first UCI bit sequence packet is greater than or equal to 12.

[0291] As an embodiment, the generating of the bit block and the physical layer processing include: channel coding, rate matching, and code block concatenation.

[0292] As an embodiment, the sending of the first message depends on the second signal.

[0293] As an embodiment, when the first condition set for the second cell is not met, the second signal does not carry the first message.

[0294] As an embodiment, the second signal does not carry the first information, including: the second signal at least multiplexes the HARQ feedback, and does not multiplex the first message.

[0295] As an embodiment, the second signal does not carry the first information, including: the second signal only multiplexes the HARQ feedback, and does not multiplex the first message.

[0296] Example 2

[0297] Embodiment 2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application, as shown in the attached Figure 2 shown. Figure 2A diagram illustrating 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 may be referred to as 5GS (5G System) / EPS (Evolved Packet System) 200 or some other suitable terminology. The 5GS / EPS 200 may include one or more UEs (User Equipment) 201, 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 may be interconnected with other access networks, but these entities / interfaces are not shown for simplicity. As shown, 5GS / EPS provides packet switching services, however, those skilled in the art will readily appreciate that the various concepts presented throughout this application can be extended to networks providing circuit switching services or other cellular networks. NG-RAN includes NR Node B (gNB) 203 and other gNBs 204. gNB 203 provides user and control plane protocol terminations toward UE 201. gNB 203 can be connected to other gNBs 204 via an Xn interface (e.g., a backhaul link). The XnAP protocol of the Xn interface is used to transmit control plane messages of the wireless network, and the user plane protocol of the Xn interface is used to transmit user plane data. gNB 203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a TRP (Transmission Reception Point, a sending and receiving node) or some other suitable term. In a NTN (Non Terrestrial Network, a non-terrestrial / satellite network) network, gNB 203 may be a satellite, an aircraft, or a ground base station relayed by a satellite. gNB203 provides an access point to 5GC / EPC210 for UE201.Examples of UE 201 include cellular phones, smart phones, Session Initiation Protocol (SIP) phones, laptop computers, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband Internet of Things devices, machine type communication devices, land vehicles, cars, vehicle-mounted devices, vehicle-mounted communication units, wearable devices, or any other similar functional devices. Those skilled in the art may also refer to UE 201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term. gNB203 is connected to 5GC / EPC210 via S1 / NG interface. 5GC / EPC210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMF214, S-GW (Service Gateway) / UPF (User Plane Function) 212 and P-GW (Packet Data Network Gateway) / UPF213. MME / AMF / SMF211 is the control node that handles signaling between UE201 and 5GC / EPC210. ​​In general, MME / AMF / SMF211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through S-GW / UPF212, which itself is connected to P-GW / UPF213. P-GW provides UE IP address allocation and other functions. P-GW / UPF213 is connected to Internet service 230. Internet service 230 includes operator-corresponding Internet protocol services, which may specifically include Internet, Intranet, IMS (IP Multimedia Subsystem) and PS (Packet Switching) streaming services.

[0298] As an embodiment, the UE201 corresponds to the first node in this application.

[0299] As an embodiment, the gNB203 corresponds to the second node in this application.

[0300] As an embodiment, the UE201 is a user equipment.

[0301] As an embodiment, the gNB203 is a macro cell base station.

[0302] As an embodiment, the gNB203 is a micro cell base station.

[0303] As an embodiment, the gNB203 is a pico cell base station.

[0304] As an embodiment, the gNB203 is a home base station (Femtocell).

[0305] As an embodiment, the gNB203 is a base station device that supports large delay difference.

[0306] As an embodiment, the gNB203 is a flying platform device.

[0307] As an embodiment, the gNB203 is a satellite device.

[0308] As an embodiment, the gNB203 is a base station device that supports large delay difference.

[0309] As an embodiment, the gNB203 is a testing device (e.g., a transceiver that simulates some functions of a base station, a signaling tester).

[0310] As an embodiment, the wireless link from the UE201 to the gNB203 is an uplink, and the uplink is used to perform uplink transmission.

[0311] As an embodiment, the wireless link from the UE241 to the gNB203 is an uplink, and the uplink is used to perform uplink transmission.

[0312] As an embodiment, the wireless link from the gNB203 to the UE201 is a downlink, and the downlink is used to perform downlink transmission.

[0313] As an embodiment, the wireless link from the gNB203 to the UE241 is a downlink, and the downlink is used to perform downlink transmission.

[0314] As an embodiment, the UE201 and the gNB203 are connected via a Uu air interface.

[0315] As an embodiment, the UE241 and the gNB203 are connected via a Uu air interface.

[0316] As an embodiment, the UE201 and the UE241 are connected via a PC5 air interface.

[0317] Example 3

[0318] Embodiment 3 illustrates a schematic diagram of a wireless protocol architecture of a user plane and a control plane according to an embodiment of the present application, as shown in the attached figure. Figure 3 shown. Figure 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300, Figure 3The radio protocol architecture of the control plane 300 of the UE and gNB is shown in three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to as PHY 301 in this article. Layer 2 (L2 layer) 305 is above PHY 301 and is responsible for the link between the UE and the gNB through PHY 301. The L2 layer 305 includes the MAC (Medium Access Control) sublayer 302, the RLC (Radio Link Control) sublayer 303, and the PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate at the gNB on the network side. The PDCP sublayer 304 provides data encryption and integrity protection. The PDCP sublayer 304 also provides support for inter-zone mobility of UEs between gNBs. The RLC sublayer 303 provides segmentation and reassembly of data packets, and retransmits lost data packets through ARQ (Automatic Repeat Request). The RLC sublayer 303 also provides duplicate data packet detection and protocol error detection. The MAC sublayer 302 provides mapping between logical channels and transport channels and multiplexing of logical channels. The MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) in a cell between 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 wireless protocol architecture of the user plane 350 includes layer 1 (L1 layer) and layer 2 (L2 layer). The wireless protocol architecture in the user plane 350 is substantially the same as the corresponding layers and sublayers in the control plane 300 for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce wireless 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 mapping between QoS flows and data radio bearers to support the diversity of services.The wireless protocol architecture of the UE in the user plane 350 may include, at the L2 layer, a SDAP sublayer 356, a PDCP sublayer 354, a portion of or all of the protocol sublayers of the RLC sublayer 353 and the MAC sublayer 352. Although not shown, the UE may also have several upper layers above the L2 layer 355, including a network layer (e.g., an IP layer) terminated at the P-GW on the network side and an application layer terminated at the other end of the connection (e.g., a remote UE, a server, etc.).

[0319] As an embodiment, the PDCP 304 sends data to the RLC 303 or receives data from the RLC 303 through an RLC channel.

[0320] As an embodiment, the PDCP354 sends data to the RLC353 or receives data from the RLC353 through the RLC channel.

[0321] As an embodiment, the RLC 303 sends data to the MAC 302 or receives data from the MAC 302 through a logical channel.

[0322] As an embodiment, the RLC353 sends data to the MAC352 or receives data from the MAC352 through a logical channel.

[0323] As an embodiment, the MAC 302 sends data to the PHY 301 or receives data from the PHY 301 through a transmission channel.

[0324] As an embodiment, the MAC 352 sends data to the PHY 351 or receives data from the PHY 351 through a transmission channel.

[0325] As an embodiment, the first receiver is used for data transmission from a bottom layer to an upper layer.

[0326] As an embodiment, the first transmitter is used for data transmission from an upper layer to a lower layer.

[0327] As a sub-embodiment of the above two embodiments, the upper layer and the bottom layer are adjacent layers.

[0328] As an example, Figure 3 The wireless protocol architecture in is applicable to the first node in this application.

[0329] As an example, Figure 3 The wireless protocol architecture in is applicable to the second node in this application.

[0330] As an embodiment, the first signal in the present application is generated by the PHY301 or the PHY351.

[0331] As an embodiment, the first signaling in the present application is generated in the PHY301 or the PHY351.

[0332] As an embodiment, the first signaling in the present application is generated by the MAC302 or the MAC352.

[0333] As an embodiment, the second signal in the present application is generated by the PHY301 or the PHY351.

[0334] As an embodiment, the first message in the present application is generated by the PHY301 or the PHY351.

[0335] As an embodiment, the first message in the present application is generated by the MAC302 or the MAC352.

[0336] As an embodiment, the second signaling in the present application is generated in the PHY301 or the PHY351.

[0337] As an embodiment, the second signaling in the present application is generated by the MAC302 or the MAC352.

[0338] As an embodiment, the first measurement report in the present application is generated by the PHY301 or the PHY351.

[0339] As an embodiment, the first RRC signaling in the present application is generated in the RRC sublayer 306.

[0340] As an embodiment, the L2 layer 305 or 355 belongs to a higher layer.

[0341] As an embodiment, the RRC sublayer 306 in the L3 layer belongs to a higher layer.

[0342] Example 4

[0343] Embodiment 4 illustrates a hardware module schematic diagram of a communication device according to an embodiment of the present application, as shown in the attached Figure 4 shown. Figure 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.

[0344] 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.

[0345] 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.

[0346] In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, the upper layer data packets from the core network or the upper layer data packets from the data source 477 are provided to the controller / processor 475. The core network and the data source 477 represent all the 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, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for the retransmission of lost packets and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). The transmit processor 416 implements coding and interleaving to facilitate FEC (forward error correction) at the second communication device 410, as well as mapping of signal constellations based on various modulation schemes (e.g., BPSK (binary phase shift keying), QPSK (quadrature phase shift keying), M-PSK (M phase shift keying), M-QAM (M quadrature amplitude modulation)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing on the coded and modulated symbols to generate one or more spatial streams. The transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes it with a reference signal (e.g., a pilot) in the time domain and / or frequency domain, and then uses IFFT (inverse fast Fourier transform) to generate a physical channel carrying a time-domain multi-carrier symbol stream. The multi-antenna transmit processor 471 then performs a transmit analog precoding / beamforming operation on the time-domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream, and then provides it to a different antenna 420.

[0347] In the transmission 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 corresponding antenna 452. Each receiver 454 recovers the information modulated onto the RF carrier and converts the RF stream into a baseband multi-carrier symbol stream and provides it to the receiving processor 456. The receiving processor 456 and the multi-antenna receiving processor 458 implement various signal processing functions of the L1 layer. The multi-antenna receiving processor 458 performs a receiving analog precoding / beamforming operation on the baseband multi-carrier symbol stream from the receiver 454. The receiving processor 456 uses FFT (Fast Fourier Transform) to convert the baseband multi-carrier symbol stream after the receiving analog precoding / beamforming operation from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receiving processor 456, wherein the reference signal will be used for channel estimation, and the data signal is recovered after multi-antenna detection in the multi-antenna receiving processor 458 to any spatial stream with the first communication device 450 as the destination. The symbols on each spatial stream are demodulated and recovered in the receiving processor 456, and soft decisions are generated. The receiving processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communication device 410 on the physical channel. The upper layer data and control signals are then provided to the controller / processor 459. The controller / processor 459 implements the functions of the L2 layer. The controller / processor 459 may be associated with a memory 460 that stores program codes and data. The memory 460 may be referred to as a computer-readable medium. In the transmission 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, decryption, header decompression, control signal processing to recover higher 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 may also be provided to the L3 for L3 processing.

[0348] In the transmission from the first communication device 450 to the second communication device 410, at the first communication device 450, the upper layer data packets are provided to the controller / processor 459 using the data source 467. The data source 467 represents all the protocol layers above the L2 layer. Similar to the transmission 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, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels, and implements L2 layer functions for user plane and control plane. The controller / processor 459 is also responsible for the retransmission of lost packets and signaling to the second communication device 410. The transmit processor 468 performs modulation mapping and channel coding processing, and the multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing. Then, the transmit processor 468 modulates the generated spatial stream into a multi-carrier / single-carrier symbol stream, which is then provided to different antennas 452 via the transmitter 454 after analog precoding / beamforming operations in the multi-antenna transmit processor 457. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency symbol stream, and then provides it to the antenna 452.

[0349] 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 reception 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 corresponding antenna 420, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to the multi-antenna reception processor 472 and the reception processor 470. The reception processor 470 and the multi-antenna reception processor 472 jointly implement the functions of the L1 layer. The controller / processor 475 implements the L2 layer functions. The 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, the controller / processor 475 provides multiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover the upper layer data packets from the first communication device 450. The upper layer data packets from the controller / processor 475 may be provided to the core network or all protocol layers above the L2 layer, and various control signals may also be provided to the core network or L3 for L3 processing.

[0350] As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor, and the first communication device 450 apparatus at least: receives a first signal, the first signal carries a first signaling, the first signaling indicates switching to a second cell, and the first signaling is a protocol layer signaling below the RRC layer; sends a second signal, the second signal carries HARQ feedback, and the HARQ feedback indicates that the first signal is correctly received; wherein, whether the second signal carries the first message depends on whether a first condition set for the second cell is met; the first condition set includes at least one of the channel quality of the first cell being better than a first threshold and the channel quality of the second cell being worse than a second threshold; the first cell is a service cell of the first node, and the second cell is a switching candidate cell for the first node.

[0351] As an embodiment, the first communication device 450 apparatus includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates an action when executed by at least one processor, and the action includes: receiving a first signal, wherein the first signal carries a first signaling, wherein the first signaling indicates switching to a second cell, and the first signaling is a protocol layer signaling below the RRC layer; sending a second signal, wherein the second signal carries HARQ feedback, and the HARQ feedback indicates that the first signal is correctly received; wherein whether the second signal carries the first message depends on whether a first condition set for the second cell is met; the first condition set includes at least one of the channel quality of the first cell being better than a first threshold and the channel quality of the second cell being worse than a second threshold; the first cell is a service cell of the first node, and the second cell is a switching candidate cell for the first node.

[0352] As an embodiment, the second communication device 410 device includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor. The second communication device 410 device at least: sends a first signal, the first signal carries a first signaling, the first signaling indicates switching to a second cell, and the first signaling is a protocol layer signaling below the RRC layer; receives a second signal, the second signal carries HARQ feedback, and the HARQ feedback indicates that the first signal is correctly received; wherein, whether the second signal carries the first message depends on whether a first condition set for the second cell is satisfied; the first condition set includes at least one of the channel quality of the first cell being better than a first threshold and the channel quality of the second cell being worse than a second threshold; the first cell is a serving cell of a recipient of the first signal, and the second cell is a candidate cell for switching of the recipient of the first signal.

[0353] As an embodiment, the second communication device 410 apparatus includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates an action when executed by at least one processor, and the action includes: sending a first signal, wherein the first signal carries a first signaling, wherein the first signaling indicates switching to a second cell, and the first signaling is a protocol layer signaling below the RRC layer; receiving a second signal, wherein the second signal carries a HARQ feedback, and the HARQ feedback indicates that the first signal is correctly received; wherein whether the second signal carries the first message depends on whether a first condition set for the second cell is met; the first condition set includes at least one of the channel quality of the first cell being better than a first threshold and the channel quality of the second cell being worse than a second threshold; the first cell is a serving cell of a recipient of the first signal, and the second cell is a switching candidate cell for the recipient of the first signal.

[0354] As an embodiment, the first communication device 450 corresponds to the first node in this application.

[0355] As an embodiment, the second communication device 410 corresponds to the second node in this application.

[0356] As an embodiment, the first communication device 450 is a user equipment.

[0357] As an embodiment, the first communication device 450 is a layer 3 relay node.

[0358] As an embodiment, the first communication device 450 is a RSU (Road Side Unit).

[0359] As an embodiment, the second communication device 410 is a base station.

[0360] As an embodiment, the second communication device 410 is a distribution unit of a base station.

[0361] As an embodiment, the second communication device 410 is a piece of code in a distributed unit of a base station.

[0362] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller / processor 475 is used to send the first signal in the present application.

[0363] 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 signal in the present application.

[0364] As an 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 used to send the second signal in the present application.

[0365] As an embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna reception processor 472, the reception processor 470 or the controller / processor 475 is used to receive the second signal in the present application.

[0366] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller / processor 475 is used to send the second signaling in the present application.

[0367] As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456 or the controller / processor 459 is used to receive the second signaling in the present application.

[0368] As an 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 used to send the first measurement report in the present application.

[0369] As an embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna reception processor 472, the reception processor 470 or the controller / processor 475 is used to receive the first measurement report in the present application.

[0370] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller / processor 475 is used to send the first RRC signaling in the present application.

[0371] 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 RRC signaling in the present application.

[0372] Example 5

[0373] Embodiment 5 illustrates a wireless signal transmission flow chart between a first node and a second node according to an embodiment of the present application, as shown in the attached figure. Figure 5 As shown in the attached Figure 5 In the example, the first node N51 and the second node N52 communicate via an air interface. It should be noted that the order in this example does not limit the signal transmission order and implementation order in this application.

[0374] for First node N51 In step S511, a first RRC signaling is received; in step S512, a first signal is received; in step S513, a second signal is sent; and in step S514, switching to a second cell is performed.

[0375] for Second node N52 In step S521, a first RRC signaling is sent; in step S522, a first signal is sent; in step S523, a second signal is received.

[0376] In embodiment 5, a first RRC signaling is received, and the first RRC signaling configures at least one switching candidate cell and at least one corresponding candidate configuration; wherein the at least one switching candidate cell includes the second cell; a first signal is received, the first signal carries a first signaling, the first signaling indicates switching to the second cell, and the first signaling is a protocol layer signaling below the RRC layer; a second signal is sent, the second signal carries HARQ feedback, and the HARQ feedback indicates that the first signal is correctly received; wherein whether the second signal carries the first message depends on whether a first condition set for the second cell is met; the first condition set includes at least one of the channel quality of the first cell being better than a first threshold and the channel quality of the second cell being worse than a second threshold; the first cell is a service cell of the first node, and the second cell is a switching candidate cell of the first node; as a response to receiving the first signal, switching to the second cell is performed; wherein the second signal does not carry the first message.

[0377] Embodiment 5 is applicable to the scenario where the second signal does not carry the first message.

[0378] As an embodiment, the first RRC signaling is received via an air interface.

[0379] As an embodiment, the first signal is received via an air interface.

[0380] As an embodiment, the second signal is sent via an air interface.

[0381] As an embodiment, the air interface is a Uu interface.

[0382] As an embodiment, the air interface is a PC5 interface.

[0383] As an embodiment, the first node N51 is a UE.

[0384] As an embodiment, the first node N51 is a terminal.

[0385] As an embodiment, the first node N51 is the first node in this application.

[0386] As an embodiment, the second node N52 is a base station.

[0387] As an embodiment, the second node N52 is a base station maintaining a service cell of the first node N51.

[0388] As an embodiment, the second node N52 is a TRP (Transmit / Receive Point) of a service cell of the first node N51.

[0389] As an embodiment, the second node N52 is the second node in this application.

[0390] As an embodiment, the first RRC signaling and the first signal are received in the first cell.

[0391] As an embodiment, the second signal is sent in the first cell.

[0392] As an embodiment, receiving on a cell means: receiving through air interface resources of a cell.

[0393] As an embodiment, sending on a cell means: sending through the air interface resources of a cell.

[0394] As an embodiment, the first RRC signaling includes RRCReconfiguration (RRC reconfiguration).

[0395] As an embodiment, the first RRC signaling includes LTM-Config (LTM configuration).

[0396] As an embodiment, the first RRC signaling is LTM-Config.

[0397] As an embodiment, the first RRC signaling includes condLTMConfig (conditional LTM configuration).

[0398] As an embodiment, the first RRC signaling includes condRRCReconfig (conditional RRC reconfiguration).

[0399] As an embodiment, the first RRC signaling includes a ltm-ReferenceConfiguration (LTM reference configuration) field.

[0400] As an embodiment, the first RRC signaling includes a ltm-CandidateToAddModList (LTM candidate add and modify list) field.

[0401] As an embodiment, the first RRC signaling includes at least one LTM-Candidate field.

[0402] As an embodiment, the at least one LTM-Candidate field configures at least one handover candidate cell and at least one corresponding candidate configuration.

[0403] As an embodiment, the at least one LTM-Candidate field and the ltm-ReferenceConfiguration field configure at least one handover candidate cell and at least one corresponding candidate configuration.

[0404] As an embodiment, the at least one switching candidate cell includes the second cell.

[0405] As an embodiment, the at least one candidate configuration includes the candidate configuration corresponding to the second cell.

[0406] As an embodiment, a handover candidate cell is the second cell.

[0407] As an embodiment, a candidate configuration is the candidate configuration corresponding to the second cell.

[0408] As an embodiment, an LTM-Candidate field includes an ltm-CandidatePCI (LTM candidate physical cell identifier) ​​field, an ltm-CandidateId (LTM candidate identifier) ​​field and an ltm-CandidateConfig (LTM candidate configuration).

[0409] As a sub-embodiment of the above embodiment, the ltm-CandidatePCI field indicates a physical cell identifier of the handover candidate cell.

[0410] As a sub-embodiment of the above embodiment, the ltm-CandidateConfig field indicates the candidate configuration corresponding to the handover candidate cell.

[0411] As a sub-embodiment of the above embodiment, the ltm-CandidateId field indicates an identifier of a candidate configuration corresponding to the handover candidate cell.

[0412] As a sub-embodiment of the above embodiment, the ltm-CandidateConfig field and the ltm-ReferenceConfiguration field indicate the candidate configuration corresponding to the handover candidate cell.

[0413] As an embodiment, the at least one switching candidate cell is for cell switching, and the cell switching includes cell switching triggered by a protocol layer below layer three.

[0414] As an embodiment, the at least one switching candidate cell is for LTM.

[0415] As an embodiment, the at least one handover candidate cell is for conditional LTM.

[0416] As an embodiment, the at least one handover candidate cell is configured to perform conditional LTM.

[0417] As an embodiment, one of the at least one handover candidate cells corresponds to one of the at least one candidate configurations.

[0418] As an embodiment, the one candidate configuration is applied to LTM.

[0419] As an embodiment, the one candidate configuration is applied to conditional LTM.

[0420] As an embodiment, the one candidate configuration is applied to CPA (Conditional PSCell Addition).

[0421] As an embodiment, the one candidate configuration is applied to CPC (Conditional PSCell Change).

[0422] As an embodiment, the one candidate configuration is applied to CPAC (Conditional PSCell Addition or Change).

[0423] As an embodiment, the one candidate configuration is used to access the one handover candidate cell.

[0424] As an embodiment, the one candidate configuration is used for switching to the one switching candidate cell.

[0425] As an embodiment, the one candidate configuration is used to perform uplink and downlink communications after switching to the one switching candidate cell.

[0426] As an embodiment, the reception of the first signal is later than the reception of the first RRC signaling.

[0427] As an embodiment, the first signal carries the first signaling, and the first signaling includes an identifier of the candidate configuration corresponding to the second cell.

[0428] As an embodiment, the first signaling indicates switching to the second cell, and whether to switch to the second cell depends on whether the first condition set for the second cell is satisfied.

[0429] As an embodiment, the second signal is sent in response to receiving the first signal.

[0430] As an embodiment, when the first set of conditions is not met, the second signal does not carry the first message.

[0431] As an embodiment, in response to receiving the first signal, switching to the second cell is performed; wherein the first condition set is not met and the second signal does not carry the first message.

[0432] As an embodiment, the switching to the second cell includes: changing the second cell into a service cell of the first node.

[0433] As an embodiment, the switching to the second cell includes: releasing or clearing the configuration of the first cell.

[0434] As an embodiment, the switching to the second cell includes: starting to apply the candidate configuration for the second cell configured by the first RRC signaling.

[0435] As an embodiment, before switching to the second cell, the candidate configuration of the second cell is not applied.

[0436] As an embodiment, along with applying the candidate configuration of the second cell, the configuration for the first cell is stopped from being applied.

[0437] As an embodiment, the switching to the second cell includes: applying the candidate configuration of the second cell to monitor the PDCCH on the second cell.

[0438] As an embodiment, the switching to the second cell includes: applying the candidate configuration of the second cell to send PRACH on the second cell.

[0439] As an embodiment, the switching to the second cell includes: applying the candidate configuration of the second cell to send at least one of UL-SCH (Uplink Shared Channel) and DL-SCH (Downlink Shared Channel) on the second cell.

[0440] As an embodiment, the switching to the second cell includes: sending a third signal on the second cell; the third signal is the first uplink signal sent on the second cell after the candidate configuration for the second cell is applied.

[0441] As a sub-embodiment of the above embodiment, the third signal is an RRCReconfigurationComplete (RRC reconfiguration complete) message; the third signal indicates completion of switching to the second cell.

[0442] As a sub-embodiment of the above embodiment, the third signal is a random access preamble; the third signal is used to initiate random access in the second cell.

[0443] Example 6

[0444] Embodiment 6 illustrates another wireless signal transmission flow chart between a first node and a second node according to an embodiment of the present application, as shown in the attached figure. Figure 6 As shown in the attached Figure 6 In the example, the first node N61 and the second node N62 communicate via an air interface. It should be noted that the order in this example does not limit the signal transmission order and implementation order in this application.

[0445] for First node N61 In step S611, a first RRC signaling is received; in step S612, a first signal is received; in step S613, a second signal is sent; and in step S614, a first time window is started.

[0446] for Second node N62 In step S621, a first RRC signaling is sent; in step S622, a first signal is sent; in step S623, a second signal is received.

[0447] In embodiment 6, a first RRC signaling is received, and the first RRC signaling configures at least one switching candidate cell and at least one corresponding candidate configuration; wherein the at least one switching candidate cell includes the second cell; a first signal is received, the first signal carries a first signaling, the first signaling indicates switching to the second cell, and the first signaling is a protocol layer signaling below the RRC layer; a second signal is sent, the second signal carries HARQ feedback, and the HARQ feedback indicates that the first signal is correctly received; wherein whether the second signal carries the first message depends on whether a first condition set for the second cell is met; the first condition set includes at least one of the channel quality of the first cell being better than a first threshold and the channel quality of the second cell being worse than a second threshold; the first cell is a service cell of the first node, and the second cell is a switching candidate cell of the first node; a first time window is started in the first symbol after the sending of the second signal is completed; wherein the second signal carries the first message.

[0448] Embodiment 6 is applicable to the scenario where the second signal carries the first message.

[0449] As an embodiment, the first node N61 is a UE.

[0450] As an embodiment, the first node N61 is a terminal.

[0451] As an embodiment, the first node N61 is the first node in this application.

[0452] As an embodiment, the second node N62 is a base station.

[0453] As an embodiment, the second node N62 is a base station maintaining a service cell of the first node N61.

[0454] As an embodiment, the second node N62 is the TRP of the service cell of the first node N61.

[0455] As an embodiment, the second node N62 is the second node in this application.

[0456] As an embodiment, the second signal is sent as a response to receiving the first signal; wherein the first set of conditions is met when the first signal is received, and the second signal carries the first message.

[0457] As an embodiment, in response to receiving the first signal, switching to the second cell is performed; wherein the first condition set is met and the second signal carries the first message.

[0458] As an embodiment, the first time window starts in the first symbol after the transmission of the second signal is completed; wherein the second signal carries the first message.

[0459] As an embodiment, when the second signal is sent and carries the first message, whether to switch to the second cell also depends on the second signaling.

[0460] As an embodiment, when the second signaling is received in the first time window and the second signaling indicates switching to the second cell, the first node switches to the second cell.

[0461] As an embodiment, the first node switches to the second cell after step S614.

[0462] As an embodiment, when the second signaling is not received in the first time window, the first node does not perform switching to the second cell.

[0463] Example 7

[0464] Embodiment 7 illustrates a signal processing flow chart in the first node according to an embodiment of the present application, as shown in the attached Figure 7 As shown in the attached Figure 7 In the example, the first node N71 is the first node in this application.

[0465] In Embodiment 7, for the first node N71,

[0466] In step S711, receiving a first signaling;

[0467] In step S712, it is determined whether the first condition set for the second cell is satisfied; if yes, step S713 is executed; if no, step S715 is executed;

[0468] In step S713, a second signal is sent, where the second signal carries the first message;

[0469] In step S714, the first time window starts;

[0470] In step S715, a second signal is sent, where the second signal does not carry the first message;

[0471] In step S716, switch to the second cell.

[0472] Example 8

[0473] Embodiment 8 illustrates a schematic diagram of the relationship between the second signal and the first time window according to an embodiment of the present application, as shown in the attached figure. Figure 8 As shown in the attached Figure 8 In the figure, the solid line box represents sending.

[0474] In Embodiment 7, a first time window starts in a first symbol after the transmission of the second signal ends; wherein the second signal carries the first message.

[0475] As an embodiment, the first time window is a timer.

[0476] As an embodiment, the name of the first time window includes Timer.

[0477] As an embodiment, the name of the first time window includes window.

[0478] As an embodiment, the first time window starts in the first symbol after the transmission of the second signal is completed.

[0479] As an embodiment, the symbol is an OFDM (Orthogonal Frequency Division Multiplexing) symbol.

[0480] As an embodiment, the symbol is a single carrier symbol.

[0481] As an embodiment, starting the first time window includes setting the value of the first time window to an initial value, and the first time window starts running.

[0482] As an embodiment, when the first time window is running, the value of the first time window is updated every time interval.

[0483] As a sub-embodiment of the above two embodiments, the initial value of the first time window is a first time length, and the update includes subtracting the value of the first time window by one of the time intervals, or, subtracting 1; wherein, when the value of the first time window is equal to zero, the first time window expires; when the value of the first time window is less than or equal to the first time length and greater than zero, the first time window is running.

[0484] As a sub-embodiment of the above two embodiments, the initial value of the first time window is zero, and the update includes adding the value of the first time window by one of the time intervals, or adding 1; wherein, when the value of the first time window is equal to the first time length, the first time window expires; when the value of the first time window is greater than or equal to zero and less than the first time length, the first time window is running.

[0485] As an embodiment, the time interval is 1 ms (millisecond).

[0486] As an embodiment, the time interval is the duration included in 1 symbol.

[0487] As an embodiment, the time interval is the duration of one time slot. As an embodiment, the duration of the first time window is the first time length.

[0488] As an embodiment, the first time length includes a positive integer number of the time intervals.

[0489] As an embodiment, the first time length is configured by the first RRC signaling.

[0490] As an embodiment, the first time length is indicated by the candidate configuration corresponding to the second cell.

[0491] As an embodiment, when the first time window runs, the first node executes a first set of operations.

[0492] As an embodiment, the first operation set includes: monitoring PDCCH on the first cell; wherein the first cell is a scheduling cell.

[0493] As an embodiment, the first operation set includes: monitoring the PDCCH used to schedule the first cell; wherein the first cell is a scheduled cell.

[0494] As an embodiment, the monitoring includes searching.

[0495] As an embodiment, monitoring the PDCCH includes: determining whether the PDCCH exists through energy monitoring.

[0496] As an embodiment, monitoring the PDCCH includes: determining whether the PDCCH exists through coherent detection.

[0497] As an embodiment, monitoring the PDCCH includes: determining whether the PDCCH exists through broadband detection.

[0498] As an embodiment, monitoring the PDCCH includes: determining whether the PDCCH exists through maximum likelihood detection.

[0499] As an embodiment, monitoring the PDCCH includes: determining whether the PDCCH exists through blind decoding detection.

[0500] As an embodiment, the first operation set includes: sending PRACH on the first cell.

[0501] As an embodiment, the PRACH is used for beam failure recovery (BFR).

[0502] As an embodiment, the PRACH is used for scheduling request (SR).

[0503] As an embodiment, the PRACH is used for uplink synchronization.

[0504] As an embodiment, the first operation set includes: sending PRACH on the second cell.

[0505] As a sub-embodiment of the above embodiment, the PRACH is used for early uplink synchronization (early UL synchronization).

[0506] As an embodiment, the first operation set includes: measurement; wherein the duration of the first time window includes at least one measurement gap.

[0507] As an embodiment, at least one of the channel quality of the first cell and the channel quality of the second cell is measured in the at least one measurement gap.

[0508] Example 9

[0509] Embodiment 9 illustrates a schematic diagram of the relationship between the second signal, the second signaling and the first time window according to an embodiment of the present application, as shown in the attached figure. Fig. 9 As shown in the attached Fig. 9 In the figure, the solid line box represents sending and the dotted line box represents receiving.

[0510] In Example 9, a second signaling is received in the first time window, the second signaling indicates switching to the second cell, and the second signaling is a protocol layer signaling below the RRC layer; in response to receiving the second signaling, the first time window is stopped and switched to the second cell.

[0511] As an embodiment, the second signaling is a response to the first message; wherein the second signal carries the first message.

[0512] As an embodiment, receiving the second signaling in the first time window means that when the second signaling is received, the first time window is running.

[0513] As an embodiment, the second signaling is received on a service cell of the first node.

[0514] As an embodiment, the second signaling is received on the first cell.

[0515] As an embodiment, the second signaling is PDCCH.

[0516] As an embodiment, the second signaling is PDSCH.

[0517] As an embodiment, the second signaling is physical layer signaling.

[0518] As an embodiment, the second signaling is DCI.

[0519] As an embodiment, the second signaling is MAC CE.

[0520] As an embodiment, the second signaling is LTM Cell Switch CommandMAC CE.

[0521] As an embodiment, the second signaling indicates that the first node confirms switching to the second cell.

[0522] As an embodiment, the second signaling instructs the first node to perform a cell handover to the second cell.

[0523] As an embodiment, the second signaling includes an identifier of the candidate configuration corresponding to the second cell.

[0524] As an embodiment, the first time window is a receiving window for the second signaling.

[0525] As an embodiment, switching to the second cell is performed in response to receiving the second signaling in the first time window.

[0526] As an embodiment, the first set of conditions is met when the first signaling is received, the first node sends the second signal carrying the first message, and starts the first time window; only when the second signaling is received in the first time window to again indicate switching to the second cell, the first node executes switching to the second cell.

[0527] As an embodiment, the first time window is stopped when the reception of the second signaling ends (endofreception).

[0528] As an embodiment, the first time window has not expired when the reception of the second signaling ends.

[0529] As an example, in the attached Fig. 9 The duration of the stopped first time window is less than the first time length.

[0530] As an embodiment, the first set of operations is performed before the first time window is stopped.

[0531] As an embodiment, the first set of operations is performed in the first time window before receiving the second signaling.

[0532] Example 10

[0533] Embodiment 10 illustrates a schematic diagram of the relationship between the second signal, the first measurement report and the first time window according to an embodiment of the present application, as shown in the attached figure. Fig.10 As shown in the attached Fig.10 In the figure, the solid line box represents sending.

[0534] In embodiment 10, a first measurement report is sent; wherein the first time window expires and the first condition set for the second cell is met.

[0535] As an embodiment, the second signaling is not received before the first time window expires.

[0536] As an embodiment, the first time window expires, and the first node receives DL-SCH on the first cell, or sends UL-SCH.

[0537] As an embodiment, the first time window expires and the first node executes the first set of operations.

[0538] As an embodiment, the first operation set includes: evaluating whether the first condition set for the second cell is met.

[0539] As an embodiment, in response to not executing the first signaling, the first node continues to evaluate in the first cell whether the first condition set for the second cell is satisfied.

[0540] As an embodiment, the triggering of the first measurement report is based on the channel quality of the first cell and the channel quality of the second cell.

[0541] As an embodiment, the triggering of the first measurement report is based on the first condition set.

[0542] As an embodiment, the first measurement report is event triggered.

[0543] As an embodiment, the first measurement report is conditionally triggered.

[0544] As an embodiment, when the first condition set is met, the first measurement report is triggered.

[0545] As an embodiment, the first measurement report is sent in the first cell.

[0546] As an embodiment, the first measurement report is a layer 1 measurement report.

[0547] As an embodiment, the first measurement report is an LTM layer 1 measurement report (LTM L1 measurement report).

[0548] As an embodiment, the first measurement report is a layer 3 measurement report.

[0549] As an embodiment, the first measurement report is a MeasurementReport message.

[0550] As an embodiment, the first measurement report includes at least one of the channel quality of the first cell and the channel quality of the second cell.

[0551] As an embodiment, the first measurement report indicates that a criterion of a measurement reporting event is met, and the measurement reporting event is that the first condition set is met.

[0552] As an embodiment, the first measurement report indicates a reason for triggering the first measurement report.

[0553] As an embodiment, the first measurement report indicates the reason why the handover to the second cell was not performed.

[0554] As an embodiment, the first measurement report indicates that a condition for switching to the second cell is not met.

[0555] As an embodiment, the interval between the triggering of the first measurement report and the end of the reception of the first signal is at least the duration of the first time window.

[0556] As an embodiment, the interval between the triggering of the first measurement report and the completion of the reception of the first signal is at least the first time length.

[0557] As an embodiment, the first RRC signaling includes the LTM-CSI-ReportConfig field.

[0558] As an embodiment, the first RRC signaling indicates the reporting configuration of the first measurement report.

[0559] As an embodiment, the first RRC signaling includes a reportOnLeave (report on leaving) field, and the reportOnLeave field indicates that the first measurement report is triggered when the first time window expires and the first condition set is met.

[0560] As an embodiment, the first condition set is configured with the reportOnLeave domain.

[0561] As an embodiment, the value of the reportOnLeave field is true.

[0562] As an embodiment, the value of the reportOnLeave field is 1.

[0563] Embodiment 11

[0564] Embodiment 11 illustrates a structural block diagram of a processing device in a first node according to an embodiment of the present application, as shown in the attached figure. Fig.11 shown.

[0565] In the attached Fig.11 In the embodiment, the first node processing device 1100 includes a first transceiver 1101; the first node 1100 is a terminal, or the first node 1100 is a UE.

[0566] In embodiment 11, the first transceiver 1101 receives a first signal, the first signal carries a first signaling, the first signaling indicates switching to a second cell, and the first signaling is a protocol layer signaling below the RRC layer; the first transceiver 1101 sends a second signal, the second signal carries HARQ feedback, and the HARQ feedback indicates that the first signal is correctly received; wherein, whether the second signal carries the first message depends on whether a first condition set for the second cell is met; the first condition set includes at least one of the channel quality of the first cell being better than a first threshold and the channel quality of the second cell being worse than a second threshold; the first cell is a service cell of the first node, and the second cell is a switching candidate cell for the first node.

[0567] As an embodiment, when the first condition set for the second cell is met, the second signal carries the first message; when the first condition set for the second cell is not met, the second signal does not carry the first message.

[0568] As an embodiment, the first transceiver 1101, in response to receiving the first signal, switches to the second cell; wherein the second signal does not carry the first message.

[0569] As an embodiment, the first transceiver 1101 starts a first time window in the first symbol after the transmission of the second signal is completed; wherein the second signal carries the first message.

[0570] As an embodiment, the first transceiver 1101 starts a first time window in the first symbol after the transmission of the second signal is completed; wherein the second signal carries the first message; the first transceiver 1101 performs a first operation set in the first time window; wherein the first operation set includes at least one of monitoring PDCCH on the first cell, monitoring PDCCH used to schedule the first cell, and sending PRACH on the first cell.

[0571] As an embodiment, the first transceiver 1101 starts a first time window in the first symbol after the transmission of the second signal is completed; wherein the second signal carries the first message; the first transceiver 1101 receives second signaling in the first time window, the second signaling indicating switching to the second cell, and the second signaling is protocol layer signaling below the RRC layer; the first transceiver 1101, as a response to receiving the second signaling, stops the first time window and switches to the second cell.

[0572] As an embodiment, the first transceiver 1101 starts a first time window in the first symbol after the transmission of the second signal is completed; wherein the second signal carries the first message; the first transceiver 1101 sends a first measurement report; wherein the first time window expires and the first condition set for the second cell is met.

[0573] As an embodiment, the first transceiver 1101 receives a first RRC signaling, and the first RRC signaling configures at least one switching candidate cell and at least one corresponding candidate configuration; wherein the at least one switching candidate cell includes the second cell.

[0574] As an embodiment, the first transceiver 1101 receives a first RRC signaling, and the first RRC signaling configures at least one switching candidate cell and at least one corresponding candidate configuration; wherein the at least one switching candidate cell includes the second cell; and the switching to the second cell includes: starting to apply the candidate configuration of the second cell.

[0575] As an embodiment, the first node 1100 is the first node in this application.

[0576] As an embodiment, the first transceiver 1101 includes Figure 4 The receiver 454 (including antenna 452), receive processor 456, multi-antenna receive processor 458 and controller / processor 459.

[0577] As an embodiment, the first transceiver 1101 includes Figure 4 At least one of the receiver 454 (including antenna 452), receive processor 456, multi-antenna receive processor 458 or controller / processor 459.

[0578] As an embodiment, the first transceiver 1101 includes Figure 4 The transmitter 454 (including antenna 452), transmit processor 468, multi-antenna transmit processor 457 and controller / processor 459.

[0579] As an embodiment, the first transceiver 1101 includes Figure 4 At least one of the transmitter 454 (including antenna 452), the transmit processor 468, the multi-antenna transmit processor 457 or the controller / processor 459.

[0580] Example 12

[0581] 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 the attached figure. Fig.12 shown.

[0582] In the attached Fig.12 In the embodiment, the second node processing device 1200 includes a first transmitter 1201 and a first receiver 1202. The second node 1200 is a base station.

[0583] In embodiment 12, the first transmitter 1201 sends a first signal, the first signal carries a first signaling, the first signaling indicates switching to a second cell, and the first signaling is a protocol layer signaling below the RRC layer; the first receiver 1202 receives a second signal, the second signal carries HARQ feedback, and the HARQ feedback indicates that the first signal is correctly received; wherein, whether the second signal carries the first message depends on whether a first condition set for the second cell is met; the first condition set includes at least one of the channel quality of the first cell being better than a first threshold and the channel quality of the second cell being worse than a second threshold; the first cell is a serving cell of a recipient of the first signal, and the second cell is a switching candidate cell for the recipient of the first signal.

[0584] As an embodiment, when the first condition set for the second cell is met, the second signal carries the first message; when the first condition set for the second cell is not met, the second signal does not carry the first message.

[0585] As an embodiment, in response to the first signal being received, the receiver of the first signal switches to the second cell; wherein the second signal does not carry the first message.

[0586] As an embodiment, a first time window is started in a first symbol after the transmission of the second signal ends; wherein the second signal carries the first message.

[0587] As an embodiment, a first time window is started in the first symbol after the transmission of the second signal is completed; wherein the second signal carries the first message; a first operation set is executed in the first time window; wherein the first operation set includes at least one of monitoring PDCCH on the first cell, monitoring PDCCH used to schedule the first cell, and sending PRACH on the first cell.

[0588] As an embodiment, a first time window is started in the first symbol after the transmission of the second signal is completed; wherein the second signal carries the first message; the first transmitter 1201 sends a second signaling in the first time window, the second signaling indicates switching to the second cell, and the second signaling is a protocol layer signaling below the RRC layer; wherein, as a response to the reception of the second signaling, the first time window is stopped, and the receiver of the first signal switches to the second cell.

[0589] As an embodiment, a first time window is started in the first symbol after the transmission of the second signal ends; wherein the second signal carries the first message; the first receiver 1202 receives a first measurement report; wherein the first time window expires and the first condition set for the second cell is met.

[0590] As an embodiment, the first transmitter 1201 sends a first RRC signaling, and the first RRC signaling configures at least one switching candidate cell and at least one corresponding candidate configuration; wherein the at least one switching candidate cell includes the second cell.

[0591] As an embodiment, the first transmitter 1201 sends a first RRC signaling, and the first RRC signaling configures at least one switching candidate cell and at least one corresponding candidate configuration; wherein the at least one switching candidate cell includes the second cell; the receiver of the first signal switches to the second cell, including: the candidate configuration of the second cell begins to be applied.

[0592] As an embodiment, the second node 1200 is the second node in this application.

[0593] As an embodiment, the first transmitter 1201 includes the attached Figure 4 The transmitter 418 (including antenna 420), transmit processor 416, multi-antenna transmit processor 471 and controller / processor 475.

[0594] As an embodiment, the first transmitter 1201 includes the attached Figure 4At least one of the transmitter 418 (including antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 and the controller / processor 475.

[0595] As an embodiment, the first receiver 1202 includes the attached Figure 4 The receiver 418 (including antenna 420), receive processor 470, multi-antenna receive processor 472 and controller / processor 475.

[0596] As an embodiment, the first receiver 1202 includes the attached Figure 4 At least one of the receiver 418 (including the antenna 420), the receive processor 470, the multi-antenna receive processor 472 or the controller / processor 475.

[0597] A person of ordinary skill in the art can understand that all or part of the steps in the above method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk or an optical disk. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment can be implemented in the form of hardware or in the form of a software functional module. The present application is not limited to any specific form of combination of software and hardware. The first type of communication node or UE or terminal in the present application includes but is not limited to mobile phones, tablet computers, notebooks, Internet cards, low-power devices, eMTC (enhanced Machine Type Communication) equipment, NB-IoT equipment, vehicle-mounted communication equipment, aircraft, airplanes, drones, remote-controlled aircraft and other wireless communication equipment. The second category of communication nodes or base stations or network-side devices in the present application include but are not limited to macrocell base stations, microcell base stations, home base stations, relay base stations, eNBs, gNBs, transmission and reception nodes TRP (Transmission and Reception Point), relay satellites, satellite base stations, aerial base stations, test equipment, such as transceivers that simulate some functions of base stations, signaling testers and other wireless communication equipment.

[0598] It should be understood by those skilled in the art that the present invention may be implemented in other specified forms without departing from its core or essential features. Therefore, the embodiments disclosed herein should be considered illustrative rather than restrictive in any way. The scope of the invention is determined by the appended claims rather than the preceding description, and all modifications within their equivalent meanings and regions are considered to be included therein.

Claims

1. A method in a first node for wireless communication, characterized in that: include: receiving a first signal, where the first signal carries a first signaling, where the first signaling indicates switching to a second cell, and where the first signaling is a protocol layer signaling below the RRC layer; sending a second signal, where the second signal carries HARQ feedback, and the HARQ feedback indicates that the first signal is correctly received; Whether the second signal carries the first message depends on whether a first set of conditions for the second cell is met; the first set of conditions includes at least one of the channel quality of the first cell being better than a first threshold and the channel quality of the second cell being worse than a second threshold; the first cell is a service cell of the first node, and the second cell is a switching candidate cell for the first node.

2. The method in the first node according to claim 1, characterized in that: When the first condition set for the second cell is met, the second signal carries the first message; when the first condition set for the second cell is not met, the second signal does not carry the first message.

3. The method in the first node according to claim 1 or 2, characterized in that: include: In response to receiving the first signal, switching to the second cell; The second signal does not carry the first message.

4. The method in the first node according to claim 1 or 2, characterized in that: include: Starting a first time window in a first symbol after the transmission of the second signal ends; Wherein, the second signal carries the first message.

5. The method in the first node according to claim 4, characterized in that: include: Executing a first set of operations in the first time window; The first operation set includes at least one of monitoring PDCCH (Physical Downlink Control Channel) on the first cell, monitoring PDCCH used for scheduling the first cell, and sending PRACH (Physical Random Access Channel) on the first cell.

6. The method in the first node according to claim 4 or 5, characterized in that: include: receiving a second signaling in the first time window, where the second signaling indicates switching to the second cell, and the second signaling is a protocol layer signaling below the RRC layer; In response to receiving the second signaling, the first time window is stopped and switching is performed to the second cell.

7. The method in the first node according to claim 4 or 5, characterized in that: include: Sending a first measurement report; The first time window expires, and the first condition set for the second cell is met.

8. The method in the first node according to any one of claims 1 to 7, characterized in that: include: receiving a first RRC signaling, wherein the first RRC signaling configures at least one handover candidate cell and at least one corresponding candidate configuration; The at least one switching candidate cell includes the second cell.

9. The method in the first node according to claim 8, characterized in that: The switching to the second cell includes: starting to apply the candidate configuration of the second cell.

10. A terminal, characterized in that: The terminal includes: one or more processors and a memory; The memory is coupled to the one or more processors, and the memory is used to store computer program codes, where the computer program codes include computer instructions. The one or more processors call the computer instructions to enable the terminal to execute the method according to any one of claims 1 to 9.

11. A method in a second node for wireless communication, characterized in that: include: Sending a first signal, where the first signal carries a first signaling, where the first signaling indicates switching to a second cell, and where the first signaling is a protocol layer signaling below the RRC layer; receiving a second signal, where the second signal carries HARQ feedback, and the HARQ feedback indicates that the first signal is correctly received; Whether the second signal carries the first message depends on whether a first set of conditions for the second cell is met; the first set of conditions includes at least one of the channel quality of the first cell being better than a first threshold and the channel quality of the second cell being worse than a second threshold; the first cell is a serving cell of a receiver of the first signal, and the second cell is a switching candidate cell for the receiver of the first signal.

12. The method in the second node according to claim 11, characterized in that: When the first condition set for the second cell is met, the second signal carries the first message; when the first condition set for the second cell is not met, the second signal does not carry the first message.

13. The method in the second node according to claim 11 or 12, characterized in that: In response to the first signal being received, the recipient of the first signal switches to the second cell; The second signal does not carry the first message.

14. The method in the second node according to claim 11 or 12, characterized in that: A first time window is started in a first symbol after the transmission of the second signal ends; Wherein, the second signal carries the first message.

15. The method in the second node according to claim 14, characterized in that: A first set of operations is executed in the first time window; The first operation set includes at least one of monitoring PDCCH on the first cell, monitoring PDCCH used for scheduling the first cell, and sending PRACH on the first cell.

16. The method in the second node according to claim 14 or 15, characterized in that: include: Sending a second signaling in the first time window, where the second signaling indicates switching to the second cell, and the second signaling is a protocol layer signaling below the RRC layer; In which, as a response to the second signaling being received, the first time window is stopped, and the receiver of the first signal is switched to the second cell.

17. The method in the second node according to claim 14 or 15, characterized in that: include: receiving a first measurement report; The first time window expires, and the first condition set for the second cell is met.

18. The method in the second node according to any one of claims 11 to 17, characterized in that: include: Sending a first RRC signaling, wherein the first RRC signaling configures at least one handover candidate cell and at least one corresponding candidate configuration; The at least one switching candidate cell includes the second cell.

19. The method in the second node according to claim 18, characterized in that: The receiver of the first signal switches to the second cell, including: the candidate configuration of the second cell begins to be applied.

20. A base station, characterized in that: The base station includes: one or more processors and a memory; The memory is coupled to the one or more processors, and the memory is used to store computer program codes, where the computer program codes include computer instructions, and the one or more processors call the computer instructions to enable the base station to perform the method according to any one of claims 11 to 19.

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