Method and device used for wireless communication

Abstract

The invention discloses a method and a device used for wireless communication. The first node receives the first DCI on the first cell; transmitting a first random access sequence on a second cell as a response to receiving the first DCI; stopping the first set of operations starting from the first time in response to the first set of conditions being satisfied; wherein the first condition set comprises that the channel quality of the first cell is poorer than a first threshold value; the first operation set comprises at least one of monitoring a PDCCH (Physical Downlink Control Channel) on the first cell, monitoring the PDCCH used for scheduling the first cell and sending a PRACH (Physical Random Access Channel) on the first cell; the first time is after the first random access sequence is transmitted, the first time depends on whether a first signaling is received from the first cell, the first signaling comprises a first timing advance command, and the first random access sequence is used for triggering the first timing advance command. According to the invention, the cell switching time delay can be effectively reduced.

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 performing cell switching in wireless communication. Background Art

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

[0003] In the new air interface technology, cell switching is one of the most basic requirements. The basic requirement of cell switching is to reduce the switching delay and reduce the impact on delay-sensitive services. In order to adapt to various application scenarios and meet different needs, 3GPP has been evolving cell switching technology. Summary of the invention

[0004] When a UE (User Equipment) moves from the coverage of one cell to the coverage of another cell, it is necessary to change the UE's serving cell, i.e. switch from the source cell to the target cell. Existing serving cell changes are usually triggered by L3 (Layer 3) measurements and are implemented through RRC (Radio Resource Control) signaling, including reconfiguration with synchronization. The serving cell change implemented at L3 has the characteristics of long delay, large signaling overhead and long interruption time. In order to overcome the above shortcomings, 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) introduced Dual Connectivity (DC), Conditional PSCell (Primary SCG (Secondary Cell Group) Cell) change (CPC), Conditional PSCell Addition (CPA), Conditional Handover (CHO) and other technologies in Rel (version) -17, but these technologies are still based on L3 implementation and cannot completely solve the above problems. At the 3GPP RAN#94e plenary meeting, it was decided to start the WI (Work Item) standardization work on the mobility enhancement technology based on L1 / L2 (Layer 1 / Layer 2). The design goal of the mobility enhancement technology based on L1 / L2 is to achieve fast switching of UE service cells. In response to the demand for mobility enhancement based on L1 / L2 in the NR system, the present application discloses a solution. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other. Furthermore, although the original intention of the present application is for the Uu air interface, the present application can also be used for the PC5 port. Furthermore, although the original intention of the present application is for the terminal and base station scenario, the present application is also applicable to other scenarios facing similar problems, but the present application is also applicable to V2X (Vehicle-to-Everything, Internet of Vehicles) scenarios, communication scenarios between terminals and relays, and relays and base stations, to achieve 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 scenarios and communication scenarios between terminals and base stations) also helps to reduce hardware complexity and costs.In particular, the interpretation of the terminology, nouns, functions, and variables in this application (unless otherwise specified) can refer to the definitions in the 3GPP specification protocols TS38 series and TS37 series.

[0005] The present application discloses a method in a first node used for wireless communication, characterized by comprising:

[0006] Receiving a first DCI on a first cell;

[0007] In response to receiving the first DCI, sending a first random access sequence on the second cell;

[0008] In response to the first set of conditions being satisfied, stopping the first set of operations starting at a first time;

[0009] Among them, the first condition set includes that the channel quality of the first cell is worse than a first threshold; 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; the first time is after the first random access sequence is sent, and the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

[0010] As an embodiment, the first cell is a service cell of the first node.

[0011] As an embodiment, the second cell is a candidate cell for cell switching of the first node.

[0012] As an embodiment, the above method can implement cell switching triggered by UE.

[0013] As an embodiment, the above method can effectively support the demand for rapid cell switching caused by rapid channel changes and reduce service interruption time.

[0014] As an embodiment, stopping the first set of operations starting from a first time includes: executing the first set of operations before the first time.

[0015] As an embodiment, the first time is the time after a time interval greater than 0 has passed since the first condition set was met.

[0016] As an embodiment, the above method stops the first operation set after the first time, which can increase the chance of obtaining the first signaling, thereby eliminating the need to initiate a random access process on the second cell during the cell switching process, effectively reducing the cell switching delay.

[0017] As an embodiment, the above method can reduce the cell switching delay by obtaining the first timing advance command through the first random access sequence.

[0018] As an embodiment, the above method can reduce the cell switching delay by carrying the first timing advance command in the first signaling.

[0019] As an embodiment, the above method receives the first timing advance command in the first cell, which can reduce the UE hardware cost.

[0020] As an embodiment, the present application is particularly applicable to a mobility enhancement scenario.

[0021] As an embodiment, the problem to be solved by the present application is: after sending a random access sequence in a switching candidate cell and before receiving a cell switching command, the UE detects that a cell switching condition is met, and how to support cell switching at this time.

[0022] As an embodiment, the solution of the present application is: after sending a random access sequence in a switching candidate cell, when the first condition set is met, the UE continues to monitor the serving cell until the first time.

[0023] As an embodiment, the above method stops the first operation set at the first time instead of the time when the first condition set is met, which can reduce the cell switching delay and shorten the service interruption time.

[0024] According to one aspect of the present application, it includes:

[0025] The first time is the earlier time of the time when the first condition set is satisfied after a first time length value and the time when the first signaling is received;

[0026] The first time length value is configurable, or preconfigured, or implementation-related.

[0027] As an embodiment, the above method can reduce the cell switching delay.

[0028] According to one aspect of the present application, it includes:

[0029] Receiving the first signaling on the first cell;

[0030] The first time is the time when the first signaling is received, and the first signaling is received after the first condition set is satisfied and within a time interval of the first time length value from the time when the first condition set is satisfied.

[0031] As an embodiment, the first signaling is a LTM (L1 / L2-triggered mobility) cell switching command MAC (Medium Access Control) CE (Control Element).

[0032] As an embodiment, the first signaling is a timing advance command (Timing Advance Command, TAC) MAC CE.

[0033] As an embodiment, the above method can reduce the cell switching delay.

[0034] According to one aspect of the present application, it includes:

[0035] The first time is the time after the first condition set is satisfied for a period of time equal to the first time length;

[0036] The first signaling is not received after the first condition set is met and within a time interval of the first time length value from the time when the first condition set is met.

[0037] As an embodiment, the above method can improve the robustness of cell switching and shorten the service interruption time.

[0038] As an embodiment, the above method can effectively avoid the risk of cell switching failure caused by failure to receive the first signaling.

[0039] As an embodiment, the above method can effectively avoid delayed cell switching commands in the network and reduce the risk of service interruption.

[0040] According to one aspect of the present application, it includes:

[0041] Sending a second random access sequence on the second cell;

[0042] receiving a second timing advance command on the second cell;

[0043] The second random access sequence is used to trigger the second timing advance command; and the second random access sequence is sent no earlier than the first time.

[0044] As an embodiment, the above method can obtain the second timing advance command by sending the second random access sequence, so as to obtain uplink synchronization with the second cell.

[0045] As an embodiment, the above method is applicable to a scenario where the first signaling is not received from the first cell.

[0046] As an embodiment, the above method can achieve backward compatibility.

[0047] According to one aspect of the present application, it includes:

[0048] Sending a first wireless signal on the second cell;

[0049] The second timing advance command or the first timing advance command is applied to the first wireless signal.

[0050] As an embodiment, the sending of the first wireless signal is later than the receiving of the first signaling.

[0051] As an embodiment, the sending of the first wireless signal is later than the receiving of the second timing advance command.

[0052] As an embodiment, when the first signaling is received from the first cell, the first timing advance command included in the first signaling is applied to the first wireless signal; when the first signaling is not received from the first cell, the second timing advance command is applied to the first wireless signal.

[0053] According to one aspect of the present application, it includes:

[0054] receiving a first RRC signaling, where the first RRC signaling is a candidate cell set configuration for a candidate cell, and the second cell belongs to the candidate cell set;

[0055] After receiving the first RRC signaling, it starts to evaluate whether the first condition set is met.

[0056] The present application discloses a method used in a second node of wireless communication, characterized by comprising:

[0057] Sending a first DCI on a first cell, where the first DCI is used to trigger sending a first random access sequence on a second cell;

[0058] The first condition set is satisfied and is used to trigger stopping of the first operation set from a first time, the first condition set includes that the channel quality of the first cell is worse than a first threshold; the first operation set includes 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. At least one of the three; the first time is after the first random access sequence is sent, the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command;

[0059] or,

[0060] Receiving a first random access sequence on a second cell, where the first random access sequence is triggered by a first DCI;

[0061] Among them, the first DCI is received on the first cell; the first condition set is satisfied and is used to trigger the stopping of the first operation set from the first time, the first condition set includes that the channel quality of the first cell is worse than a first threshold; 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; the first time is after the first random access sequence is sent, the first time depends on whether the first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

[0062] As an embodiment, the above method is applicable to a scenario in which the second node is a base station of the first cell.

[0063] As an embodiment, the above method is applicable to a scenario in which the second node is a base station of the second cell.

[0064] As an embodiment, the above method is applicable to a scenario where the second node is both a base station of the first cell and a base station of the second cell.

[0065] According to one aspect of the present application, it includes:

[0066] The behavior is to send a first DCI on a first cell, and the first DCI is used to trigger sending a first random access sequence on a second cell; wherein a first condition set is satisfied and is used to trigger stopping a first operation set from a first time, and the first condition set includes that a channel quality of the first cell is worse than a first threshold; the first operation set includes monitoring a PDCCH (physical downlink control channel) on the first cell, monitoring a PDCCH for scheduling the first cell, and sending a PRACH (physical random access channel) on the first cell; the first time is after the first random access sequence is sent, and the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command;

[0067] and

[0068] The behavior is to receive a first random access sequence on a second cell, where the first random access sequence is triggered by a first DCI;

[0069] The first DCI is received on a first cell; a first condition set is satisfied and is used to trigger stopping a first operation set from a first time, the first condition set including that a channel quality of the first cell is worse than a first threshold; the first operation set includes monitoring a PDCCH (physical downlink control channel) on the first cell, monitoring a PDCCH for scheduling the first cell, and sending a PRACH (physical random access channel) on the first cell; the first time is after the first random access sequence is sent, the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command;

[0070] Both of the above actions are performed.

[0071] As an embodiment, the above method is applicable to a scenario where the second node is both a base station of the first cell and a base station of the second cell.

[0072] According to one aspect of the present application, it includes:

[0073] The first time is the earlier time of the time when the first condition set is satisfied after a first time length value and the time when the first signaling is received;

[0074] The first time length value is configurable, or preconfigured, or implementation-related.

[0075] According to one aspect of the present application, it includes:

[0076] Sending the first signaling on the first cell;

[0077] The first time is the time when the first signaling is received, and the first signaling is received after the first condition set is satisfied and within a time interval of the first time length value from the time when the first condition set is satisfied.

[0078] According to one aspect of the present application, it includes:

[0079] The first time is the time after the first condition set is satisfied for a period of time equal to the first time length;

[0080] The first signaling is not received after the first condition set is met and within a time interval of the first time length value from the time when the first condition set is met.

[0081] According to one aspect of the present application, it includes:

[0082] receiving a second random access sequence on the second cell;

[0083] sending a second timing advance command on the second cell;

[0084] The second random access sequence is used to trigger the second timing advance command; and the second random access sequence is received no earlier than the first time.

[0085] According to one aspect of the present application, it includes:

[0086] receiving a first wireless signal on the second cell;

[0087] The first timing advance command or the second timing advance command is applied to the first wireless signal.

[0088] According to one aspect of the present application, it includes:

[0089] Sending a first RRC signaling, where the first RRC signaling is a candidate cell set configuration for a candidate cell, and the second cell belongs to the candidate cell set;

[0090] After the first RRC signaling is received, whether the first condition set is satisfied is evaluated.

[0091] The present application discloses a first node used for wireless communication, characterized in that it includes:

[0092] A first processor receives a first DCI on a first cell; in response to receiving the first DCI, sends a first random access sequence on a second cell; in response to a first set of conditions being satisfied, stops a first set of operations starting from a first time;

[0093] Among them, the first condition set includes that the channel quality of the first cell is worse than a first threshold; 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; the first time is after the first random access sequence is sent, and the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

[0094] The present application discloses a second node used for wireless communication, characterized in that it includes:

[0095] A second processor sends a first DCI on a first cell, where the first DCI is used to trigger sending a first random access sequence on a second cell;

[0096] The first condition set is satisfied and is used to trigger stopping of the first operation set from a first time, the first condition set includes that the channel quality of the first cell is worse than a first threshold; the first operation set includes 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. At least one of the three; the first time is after the first random access sequence is sent, the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command;

[0097] or,

[0098] A third processor receives a first random access sequence on a second cell, where the first random access sequence is triggered by a first DCI;

[0099] Among them, the first DCI is received on the first cell; the first condition set is satisfied and is used to trigger the stopping of the first operation set from the first time, the first condition set includes that the channel quality of the first cell is worse than a first threshold; 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; the first time is after the first random access sequence is sent, the first time depends on whether the first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

[0100] As an embodiment, the second node is a base station of the first cell.

[0101] As an embodiment, the second node is a base station of the second cell.

[0102] As an embodiment, the second node is both a base station of the first cell and a base station of the second cell.

[0103] According to one aspect of the present application, it includes:

[0104] The second node includes the second processor and the third processor.

[0105] As an embodiment, the second node is both a base station of the first cell and a base station of the second cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0106] 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:

[0107] Figure 1 A signal processing flow chart in a first node according to an embodiment of the present application is illustrated;

[0108] Figure 2 A schematic diagram illustrating a network architecture according to an embodiment of the present application is illustrated;

[0109] 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;

[0110] Figure 4 A hardware module schematic diagram of a communication device according to an embodiment of the present application is illustrated;

[0111] Figure 5An example of a wireless signal transmission flow chart according to an embodiment of the present application is provided;

[0112] Figure 6 An example of a wireless signal transmission flow chart according to an embodiment of the present application is provided;

[0113] Figure 7 An example of a relationship between a first condition set being satisfied, a first signaling, a first time, and a first time length value according to an embodiment of the present application is provided;

[0114] Figure 8 A schematic diagram illustrating the relationship between a first time and a first time length value when a first condition set is satisfied according to an embodiment of the present application;

[0115] Fig. 9 An example structural block diagram of a processing device in a first node according to an embodiment of the present application is shown;

[0116] Fig.10 The structural block diagram of the processing device in the second node according to an embodiment of the present application is illustrated. DETAILED DESCRIPTION

[0117] 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.

[0118] Example 1

[0119] Embodiment 1 illustrates a signal processing flow chart in a first node according to an embodiment of the present application, as shown in the attached Figure 1 shown.

[0120] In embodiment 1, the first node 100 receives a first DCI on a first cell in step 101; sends a first random access sequence on a second cell as a response to receiving the first DCI in step 102; stops a first operation set starting from a first time in response to a first condition set being satisfied in step 103; wherein the first condition set includes that a channel quality of the first cell is worse than a first threshold; the first operation set includes at least one of monitoring a PDCCH (physical downlink control channel) on the first cell, monitoring a PDCCH used to schedule the first cell, and sending a PRACH (physical random access channel) on the first cell; the first time is after the first random access sequence is sent, and the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

[0121] As an embodiment, a first DCI (Downlink Control Information) is received on a first cell.

[0122] As an embodiment, the first cell is a SpCell (Special Cell).

[0123] As an embodiment, the first cell is a PCell (Primary Cell).

[0124] As an embodiment, the format of the first DCI is 1_0.

[0125] As an embodiment, the first DCI is for a random access process initiated by a PDCCH (Physical Downlink ControlCHannel) order.

[0126] As an embodiment, the first DCI is received via PDCCH.

[0127] As an embodiment, in response to receiving the first DCI, a first random access sequence is sent on the second cell.

[0128] As an embodiment, the first DCI indicates the air interface resources for sending the first random access sequence on the second cell.

[0129] As a sub-embodiment of the above embodiment, the first DCI indicates the second cell.

[0130] As a sub-embodiment of the above embodiment, the first DCI includes a UL (Uplink) / SUL (Supplementary UpLink) indication.

[0131] As a sub-embodiment of the above embodiment, the first DCI includes an SS (Synchronization Signals) / PBCH (Physical Broadcast Channel) index.

[0132] As a sub-embodiment of the above embodiment, the first DCI includes a PRACH (Physical Random Access CHannel) mask index.

[0133] As a sub-embodiment of the above embodiment, the first DCI includes an index of the first random access sequence.

[0134] As an embodiment, the index of the first random access sequence uniquely identifies the first random access sequence.

[0135] As an embodiment, the random access sequence in the present application means a random access preamble.

[0136] As an embodiment, the first random access sequence is a signature sequence.

[0137] As an embodiment, the first random access sequence is a Gold sequence.

[0138] As an embodiment, the first random access sequence is an M sequence.

[0139] As an embodiment, the first random access sequence is a ZC (Zadoff–Chu) sequence.

[0140] As an embodiment, the first random access sequence is dedicated to the first node.

[0141] As an embodiment, the first random access sequence is sent via PRACH.

[0142] As an embodiment, the second cell is not a service cell of the first node.

[0143] As an embodiment, the first random access sequence is sent on the second cell, and the random access process to which the first random access sequence belongs is completed.

[0144] As an embodiment, after receiving the first random access sequence from the second cell, the base station to which the second cell belongs can obtain the first timing advance value of the sender of the first random access sequence, and the first timing advance value is applied to uplink transmission on the second cell.

[0145] As an embodiment, the first node does not monitor a RAR (random access response) on the second cell after sending the first random access sequence on the second cell.

[0146] As an embodiment, the above method can reduce the communication interruption time between the first node and the serving cell, and the serving cell includes the first cell.

[0147] As an embodiment, the first random access sequence belongs to a 1-step random access process.

[0148] As an embodiment, the first DCI explicitly indicates the second cell.

[0149] As an embodiment, the first DCI includes an identifier of the second cell.

[0150] As an embodiment, the identifier of the second cell is PhysCellId (physical cell identifier).

[0151] As an embodiment, the identifier of the second cell is candidateCellID (candidate cell identifier).

[0152] As an embodiment, the first DCI implicitly indicates the second cell.

[0153] As an embodiment, the first DCI includes a first configuration identifier, and the first configuration identifier indicates a candidate cell configuration, and the candidate cell configuration is for the second cell.

[0154] As an embodiment, in response to a first set of conditions being met, a first set of operations is stopped starting at a first time.

[0155] As an embodiment, the first condition set being satisfied means that all conditions in the first condition set are satisfied.

[0156] As an embodiment, the first condition set includes at least one condition.

[0157] As an embodiment, the first condition set includes conditions for performing cell switching configured by the source base station of the first node.

[0158] As a sub-embodiment of the above embodiment, the cell switching is performed at a protocol layer below layer 3.

[0159] As a sub-embodiment of the above embodiment, the cell switching is performed at the MAC sublayer.

[0160] As a sub-embodiment of the above embodiment, the cell switching is performed at the physical layer.

[0161] As an embodiment, the first condition set includes that the channel quality of the first cell is worse than a first threshold.

[0162] As an embodiment, the first threshold is a measurement value.

[0163] As an embodiment, the first threshold is a configuration value.

[0164] As an embodiment, the first threshold is a value obtained by linearly processing the measured value and the configured value.

[0165] As an embodiment, the first condition set includes one condition, and the one condition is that the channel quality of the first cell is worse than the first threshold; wherein the first threshold is the channel quality of the second cell.

[0166] As an embodiment, the first condition set includes two conditions, the first of the two conditions being that the channel quality of the first cell is worse than the first threshold; the second of the two conditions being that the channel quality of the second cell is better than a second threshold; wherein the first threshold is configured by the network, and the second threshold is configured by the network.

[0167] As an embodiment, when the channel quality of one cell is less than a threshold, the channel quality of the one cell is worse than the threshold.

[0168] As an embodiment, when the channel quality of one cell is greater than a threshold, the channel quality of the one cell is better than the threshold.

[0169] As an embodiment, the channel quality of a cell is represented by RSRP (Reference Signal Received Power), or RSRQ (Reference Signal Received Quality), or RSSI (Received Signal Strength Indicator), or SINR (Signal to Interference & Noise Ratio).

[0170] As an embodiment, the channel quality of a cell is obtained by measuring a reference signal of the cell.

[0171] As an embodiment, the cell measurement is performed at a protocol layer below L3 (Layer 3).

[0172] As an embodiment, the cell measurement is performed at L1 (layer 1).

[0173] As an embodiment, the reference signal is SSB (Synchronization Signal Block).

[0174] As an embodiment, the reference signal is CSI-RS (Channel Status Information-Reference Signal).

[0175] As an example, the reference signal is an SSB (Synchronization Signals / Physical Broadcast Channel).

[0176] As an example, the channel quality of a cell is obtained after linear processing of the measured value of the reference signal for the cell and a configured offset value.

[0177] As a sub - example of the above example, the configured offset value includes at least one of the following four offset values: an offset value specific to a measurement object, an offset value specific to a cell, an offset value for an event, and a hysteresis parameter value for an event.

[0178] As an example, the channel quality of the first cell being worse than the first threshold includes: Mp < Mn; where 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 example, the channel quality of the first cell being worse 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.

[0180] As an example, the channel quality of the second cell being better 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.

[0181] As an example, the channel quality of the first cell being worse than the first threshold includes: Mn + Ofn + Ocn – Hys > Mp + Ofp + Ocp + Off; where the channel quality of the first cell is Mp + Ofp + Ocp + Off; the first threshold is Mn + Ofn + Ocn – Hys; Mp is the result measured for the first cell; Ofp is the offset value dedicated to the measurement object for the first cell; Ocp is the cell-specific offset value for the first cell; Off is the offset value for the event; Mn is the result measured for the second cell; Ofn is the offset value dedicated to the measurement object for the second cell; Ocn is the cell-specific offset value for the second cell; Hys is the hysteresis parameter value for the event; 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-SINR (Reference Signal-Signal to Interference & Noise Ratio), the units of Mp and Mn are dB (decibel); the units of Ofn, Ocn, Ofp, Ocp, Hys, and Off are dB.

[0182] As an example, the channel quality of the first cell being worse than the first threshold includes: Mp + Hys < Thresh1; where the channel quality of the first cell is Mp + Hys, the first threshold is Thresh1; Mp is the result measured for the first cell; Hys is the hysteresis parameter value for the event; Thresh1 is configured.

[0183] As an example, the channel quality of the second cell being better than the second threshold includes: the channel quality of the second cell is Mn + Ofn + Ocn – Hys, the second threshold is Thresh2; where Mn is the result measured for the second cell; Ofn is the offset value dedicated to the measurement object for the second cell; Ocn is the cell-specific offset value for the second cell; Hys is the hysteresis parameter value for the event; Thresh2 is configured.

[0184] As an embodiment, when the Mp and the Mn are RSRP, the units of the Mp and the Mn are dBm (decibel milliwatt); when the Mp and the Mn are RSRQ or RS (Reference Signal)-SINR, the units of the Mp and the Mn are dB (decibel); the units of the Ofn, the Ocn and the Hys are dB, the unit of the Threshold1 is the same as the unit of the Mp; the unit of the Threshold2 is the same as the unit of the Mn.

[0185] As an embodiment, the first set of operations is stopped starting from the first time.

[0186] As an embodiment, the first time is a subframe.

[0187] As an embodiment, the first time is the start time of a subframe.

[0188] As an embodiment, the first time is the end time of a subframe.

[0189] As an embodiment, the first time is a time slot.

[0190] As an embodiment, the first time is the start time of a time slot.

[0191] As an embodiment, the first time is the end moment of a time slot.

[0192] As an embodiment, the first time is an OFDM (Orthogonal Frequency Division Multiplexing) symbol.

[0193] As an embodiment, the first time is the starting time of an OFDM symbol.

[0194] As an embodiment, the first time is the end time of an OFDM symbol.

[0195] As an embodiment, 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.

[0196] As an embodiment, the phrase monitoring PDCCH on the first cell includes: monitoring PDCCH on air interface resources of the first cell.

[0197] As an embodiment, the phrase monitoring a PDCCH used to schedule the first cell includes: monitoring a PDCCH, wherein the PDCCH is used to schedule air interface resources of the first cell.

[0198] As an embodiment, the phrase sending PRACH on the first cell includes: sending PRACH on air interface resources of the first cell.

[0199] As an embodiment, monitoring the PDCCH means: determining whether the PDCCH exists through energy detection.

[0200] As an embodiment, monitoring the PDCCH means: determining whether the PDCCH exists by maximum likelihood detection.

[0201] As an embodiment, monitoring the PDCCH means: determining whether the PDCCH exists through blind decoding detection.

[0202] As an embodiment, the behavior of stopping the first operation set includes: not monitoring PDCCH in the first cell.

[0203] As an embodiment, the behavior of stopping the first operation set includes: not monitoring PDCCH for the first cell.

[0204] As an embodiment, the behavior of stopping the first operation set includes: not monitoring the PDCCH used to schedule the first cell.

[0205] As an embodiment, the behavior of stopping the first operation set includes: not sending RACH (Random Access CHannel) on the first cell.

[0206] As an embodiment, the behavior of stopping the first operation set includes: not sending PRACH on the first cell.

[0207] As an embodiment, the behavior of stopping the first operation set includes: stopping the sending of HARQ (Hybrid Automatic Repeat Request)-ACK (ACKnowledgement) associated with the first cell.

[0208] As an embodiment, the behavior of stopping the first operation set includes: clearing PUSCH (Physical Uplink Shared Channel) resources of a semi-persistent CSI (Channel Status Information) report associated with the first cell.

[0209] As an embodiment, the behavior of stopping the first operation set includes: flushing HARQ buffers associated with the first cell.

[0210] As an embodiment, the behavior of stopping the first operation set includes: deactivating a BWP (BandWidth Part) associated with the first cell.

[0211] As an embodiment, the behavior of stopping the first operation set includes: stopping a bwp-inactivitytimer (bandwidth part inactivity timer) associated with the first cell.

[0212] As an embodiment, the behavior of stopping the first operation set includes: not sending SRS (Sounding Reference Signal, sounding reference signal) in the first cell.

[0213] As an embodiment, the behavior of stopping the first operation set includes: not sending UL-SCH (Uplink Shared Channel) in the first cell.

[0214] As an embodiment, the behavior of stopping the first operation set includes: not sending PUCCH (Physical Uplink Control Channel) in the first cell.

[0215] As an embodiment, the behavior of stopping the first operation set includes: detaching from the first cell.

[0216] As an embodiment, the behavior of stopping the first operation set includes: releasing the air interface resources of the first cell and the configuration for the first cell.

[0217] As an embodiment, the first time is after the first random access sequence is sent.

[0218] As an embodiment, the first time is after the time domain resources occupied by the first random access sequence.

[0219] As an embodiment, the first time depends on whether a first signaling is received from the first cell.

[0220] As an embodiment, the first time is related to whether the first signaling is received from the first cell.

[0221] As an embodiment, whether the first signaling is received from the first cell is used to determine the first time.

[0222] As an embodiment, the first signaling is protocol layer signaling below layer 3.

[0223] As an embodiment, the protocol layers below layer 3 include a MAC sublayer and a physical layer.

[0224] As an embodiment, the first signaling is MAC CE (Control Element).

[0225] As an embodiment, the first signaling is DCI.

[0226] As an embodiment, the first signaling is a physical layer signal.

[0227] As an embodiment, the first signaling includes a first timing advance command (TAC).

[0228] As an embodiment, the first timing advance command includes 12 bits.

[0229] As an embodiment, the first timing advance value determined according to the first timing advance command is an absolute value.

[0230] As an embodiment, the first timing advance value determined according to the first timing advance command is a relative value.

[0231] As an embodiment, the first signaling is an Absolute Timing Advance Command (Absolute Timing Advance Command) MAC CE.

[0232] As an embodiment, the first signaling is a Timing Advance Command (Timing Advance Command) MACCE.

[0233] As an embodiment, the first signaling is LTM Cell Switch Command (cell switching command) MACCE.

[0234] As a sub-embodiment of the above embodiment, the code point value of the eLCID (extended Logical Channel Identifier) ​​corresponding to the first signaling is 225.

[0235] As a sub-embodiment of the above embodiment, the index value of the eLCID corresponding to the first signaling is 289.

[0236] As an embodiment, the first signaling indicates cell switching.

[0237] As an embodiment, the first signaling indicates switching to the second cell.

[0238] As an embodiment, the first signaling indicates the second cell.

[0239] As an embodiment, the first signaling implicitly indicates the second cell.

[0240] As an embodiment, the first signaling includes the first configuration identifier, and the first configuration identifier indicates a candidate cell configuration, and the candidate cell configuration is for the second cell.

[0241] As an embodiment, the first signaling is not received from the first cell after sending the first random access sequence and before the first condition set is met.

[0242] As an embodiment, the first cell is a serving cell, and the second cell is an LTM candidate cell.

[0243] As an embodiment, the first random access sequence is used to determine a timing advance value for the second cell.

[0244] As an embodiment, the first random access sequence is used to trigger the first timing advance command.

[0245] As an embodiment, the first random access sequence is used to trigger the first timing advance command, which means that the first timing advance command depends on the first random access sequence.

[0246] As an embodiment, the first random access sequence is used to trigger the first timing advance command, which means that the first timing advance command is a response to the first random access sequence.

[0247] As an embodiment, the first random access sequence is used to trigger the first timing advance command, which means that the sending of the first timing advance command must be caused by the sending of the first random access sequence.

[0248] As an embodiment, the first random access sequence is used to trigger the first timing advance command, including: the first random access sequence is used to generate the first timing advance command.

[0249] As an embodiment, the first timing advance command is for the second cell.

[0250] As an embodiment, the first timing advance command is applied to a TAG (timing advance group) to which the second cell belongs.

[0251] As an embodiment, the first timing advance command is used for uplink synchronization of the first node and the second cell.

[0252] As an embodiment, the first timing advance command is used for uplink synchronization when the first node performs uplink transmission on the second cell.

[0253] As an embodiment, the first timing advance command is valid.

[0254] As an embodiment, the value of the first timing advance command does not include the hexadecimal number FFF.

[0255] Example 2

[0256] 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., backhaul). gNB 203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a TRP (Transmission Reception Point), or some other suitable term. In a NTN (Non Terrestrial Network, non-terrestrial / satellite network) network, gNB 203 may be a satellite, an aircraft, or a ground base station relayed by a satellite. gNB 203 provides an access point to 5GC / EPC 210 for UE 201.Examples of UE 201 include cellular phones, smart phones, Session Initiation Protocol (SIP) phones, laptop computers, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband 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 the 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.

[0257] As an embodiment, the UE201 corresponds to the first node in this application.

[0258] As an embodiment, the NR node B203 corresponds to the second node in this application.

[0259] As an embodiment, the gNB203 is a macro cell base station.

[0260] As an embodiment, the gNB203 is a micro cell base station.

[0261] As an embodiment, the gNB203 is a pico cell base station.

[0262] As an embodiment, the gNB203 is a home base station (Femtocell).

[0263] As an embodiment, the gNB203 is a base station device that supports large delay difference.

[0264] As an embodiment, the gNB203 is a flying platform device.

[0265] As an embodiment, the gNB203 is a satellite device.

[0266] As an embodiment, the gNB203 is a testing device (e.g., a transceiver that simulates some functions of a base station, a signaling tester).

[0267] As an embodiment, the wireless link from the UE201 to the gNB203 is an uplink, and the uplink is used to perform uplink transmission.

[0268] As an embodiment, the wireless link from the gNB203 to the UE201 is a downlink, and the downlink is used to perform downlink transmission.

[0269] As an embodiment, the UE201 and the gNB203 are connected via a Uu interface.

[0270] Example 3

[0271] 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 retransmission of lost data packets through ARQ. The RLC sublayer 303 also provides duplicate data packet detection and protocol error detection. The MAC sublayer 302 provides mapping between logical and transport channels and multiplexing of logical channel identities. The MAC sublayer 302 is also responsible for allocating 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. Although not shown in the figure, there may be a V2X layer above the RRC sublayer 306 in the control plane 300 of the UE. The V2X layer is responsible for generating a PC5QoS parameter group and QoS rules based on the received service data or service request, generating a PC5QoS flow corresponding to the PC5QoS parameter group, and sending the PC5QoS flow identifier and the corresponding PC5QoS parameter group to the AS (Access Stratum) layer for the AS layer to perform QoS processing on the data packets belonging to the PC5QoS flow identifier; the V2X layer also includes a PC5-S signaling protocol (PC5-Signaling Protocol) sublayer, and the V2X layer is responsible for indicating whether each transmission of the AS layer is a PC5-S transmission or a V2X service data transmission.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 (Quality of Service) flows and data radio bearers (DRBs) 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.).

[0272] As an example, Figure 3 The wireless protocol architecture in is applicable to the first node in this application.

[0273] As an example, Figure 3 The wireless protocol architecture in is applicable to the second node in this application.

[0274] As an embodiment, the first DCI in the present application is generated by the PHY301 or the PHY351.

[0275] As an embodiment, the first random access sequence in the present application is generated in the PHY301 or the PHY351.

[0276] As an embodiment, the first signaling in the present application is generated by the MAC302 or the MAC352.

[0277] As an embodiment, the first signaling in the present application is generated in the PHY301 or the PHY351.

[0278] As an embodiment, the second random access sequence in the present application is generated in the PHY301 or the PHY351.

[0279] As an embodiment, the second timing advance command in the present application is generated by the MAC302 or the MAC352.

[0280] As an embodiment, the first RRC signaling in the present application is generated in the RRC306.

[0281] As an embodiment, the first wireless signal in the present application is generated by the PHY301 or the PHY351.

[0282] As an embodiment, the RRC sublayer 306 in the L3 layer belongs to a higher layer.

[0283] Example 4

[0284] 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.

[0285] 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.

[0286] 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.

[0287] 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 forward error correction (FEC) at the second communication device 410, as well as mapping of signal constellations based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). 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 an inverse fast Fourier transform (IFFT) to generate a physical channel carrying a time-domain multi-carrier symbol stream. The multi-antenna transmit processor 471 then performs a transmit analog precoding / beamforming operation on the time-domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream, and then provides it to a different antenna 420.

[0288] 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 a fast Fourier transform (FFT) to convert the baseband multi-carrier symbol stream after the receiving analog precoding / beamforming operation from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receiving processor 456, 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 destined for the first communication device 450. 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, and control signal processing to recover the upper layer data packets from the second communication device 410. The upper layer data packets are then provided to all protocol layers above the L2 layer. Various control signals may also be provided to the L3 for L3 processing.

[0289] 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.

[0290] 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.

[0291] 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 DCI on a first cell; sends a first random access sequence on a second cell as a response to receiving the first DCI; stops a first operation set from a first time as a response to a first condition set being satisfied; wherein the first condition set includes that the channel quality of the first cell is worse than a first threshold; 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; the first time is after the first random access sequence is sent, and the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

[0292] 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, wherein the action includes: receiving a first DCI on a first cell; sending a first random access sequence on a second cell in response to receiving the first DCI; stopping a first operation set starting from a first time in response to a first condition set being satisfied; wherein the first condition set includes that the channel quality of the first cell is worse than a first threshold; the first operation set includes at least one of monitoring a PDCCH (physical downlink control channel) on the first cell, monitoring a PDCCH used to schedule the first cell, and sending a PRACH (physical random access channel) on the first cell; the first time is after the first random access sequence is sent, and the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

[0293] As an embodiment, the second communication device 410 device includes: at least one processor and at least one memory, the at least one memory includes computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor. The second communication device 410 device at least: sends a first DCI on a first cell, the first DCI is used to trigger the sending of a first random access sequence on a second cell; wherein the first condition set is satisfied and is used to trigger the stopping of a first operation set from a first time, the first condition set includes that the channel quality of the first cell is worse than a first threshold; the first operation set includes 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. At least one of the three; the first time is after the first random access sequence is sent, the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command command; or, receiving a first random access sequence on a second cell, the first random access sequence being triggered by a first DCI; wherein the first DCI is received on the first cell; a first condition set is satisfied and is used to trigger stopping a first operation set starting from a first time, the first condition set comprising that a channel quality of the first cell is worse than a first threshold; the first operation set comprises at least one of monitoring a PDCCH (physical downlink control channel) on the first cell, monitoring a PDCCH used for scheduling the first cell, and sending a PRACH (physical random access channel) on the first cell; the first time is after the first random access sequence is sent, the first time depends on whether a first signaling is received from the first cell, the first signaling comprising a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

[0294] 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, wherein the action includes: sending a first DCI on a first cell, wherein the first DCI is used to trigger sending a first random access sequence on a second cell; wherein a first condition set is satisfied and is used to trigger stopping a first operation set from a first time, wherein the first condition set includes that the channel quality of the first cell is worse than a first threshold; the first operation set includes monitoring a PDCCH (physical downlink control channel) on the first cell, monitoring a PDCCH used to schedule the first cell, and sending a PRACH (physical random access channel) on the first cell; the first time is after the first random access sequence is sent, and the first time depends on whether a first signaling is received from the first cell, and the first signaling includes a first fixed A timing advance command is received on a second cell, and the first random access sequence is used to trigger the first timing advance command; or, a first random access sequence is received on a second cell, and the first random access sequence is triggered by a first DCI; wherein the first DCI is received on the first cell; a first condition set is satisfied and is used to trigger stopping a first operation set from a first time, and the first condition set includes that the channel quality of the first cell is worse than a first threshold; the first operation set includes monitoring a PDCCH (physical downlink control channel) on the first cell, monitoring a PDCCH used for scheduling the first cell, and sending a PRACH (physical random access channel) on the first cell; the first time is after the first random access sequence is sent, and the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

[0295] As an embodiment, the first communication device 450 corresponds to the first node in this application.

[0296] As an embodiment, the second communication device 410 corresponds to the second node in this application.

[0297] As an embodiment, the first communication device 450 is a UE.

[0298] As an embodiment, the first communication device 450 is a relay.

[0299] As an embodiment, the second communication device 410 is a base station device.

[0300] As an embodiment, the second communication device 410 is a distribution unit of a base station.

[0301] As an embodiment, the second communication device 410 is a piece of code in a distributed unit of a base station.

[0302] 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 DCI in the present application.

[0303] 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 DCI in the present application.

[0304] 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 random access sequence in the present application.

[0305] 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 random access sequence in the present application.

[0306] 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 random access sequence in the present application.

[0307] As an embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna receiving processor 472, the receiving processor 470 or the controller / processor 475 is used to receive the second random access sequence in the present application.

[0308] 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 timing advance command in the present application.

[0309] 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 second timing advance command in the present application.

[0310] 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.

[0311] 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.

[0312] 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 wireless signal in the present application.

[0313] As an embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna receiving processor 472, the receiving processor 470 or the controller / processor 475 is used to receive the first wireless signal in the present application.

[0314] 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 signaling in the present application.

[0315] 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 first signaling in the present application.

[0316] Example 5

[0317] Embodiment 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in the attached Figure 5 As shown in the attached Figure 5 In the embodiment, the first node N51 and the second processor N52 communicate via a wireless interface, and the first node N51 and the third processor N53 communicate via a wireless interface. It is particularly noted that the order in this example does not limit the signal transmission order and implementation order in this application. Embodiment 5 is applicable to the scenario where the first signaling is received from the first cell.

[0318] for First node N51, receiving a first RRC signaling in step S511; receiving a first DCI in step S512; sending a first random access sequence in step S513; determining that a first condition set is satisfied in step S514; receiving a first signaling in step S515; stopping a first operation set from a first time in step S516; and sending a first wireless signal in step S517.

[0319] for Second processor N52 , sending a first RRC signaling in step S521; sending a first DCI in step S522; sending a first signaling in step S523.

[0320] for The third processor N53 , receiving a first random access sequence in step S531; receiving a first wireless signal in step S532.

[0321] In embodiment 5, a first DCI is received on a first cell; as a response to receiving the first DCI, a first random access sequence is sent on a second cell; as a response to a first condition set being satisfied, a first operation set is stopped starting from a first time; wherein the first condition set includes that a channel quality of the first cell is worse than a first threshold; the first operation set includes at least one of monitoring a PDCCH (physical downlink control channel) on the first cell, monitoring a PDCCH used to schedule the first cell, and sending a PRACH (physical random access channel) on the first cell; the first time is after the first random access sequence is sent, the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command; the first time is the first condition set The earlier of the two times: the time after the first time length value is passed when the first condition set is met and the time when the first signaling is received; wherein the first time length value is configurable, or pre-configured, or implementation-related; receiving the first signaling on the first cell; wherein the first time is the time when the first signaling is received, and the first signaling is received after the first condition set is met and within the time interval of the first time length value passed when the first condition set is met; receiving a first RRC signaling, the first RRC signaling is a candidate cell set configuration candidate cell configuration, and the second cell belongs to the candidate cell set; after receiving the first RRC signaling, the first node starts to evaluate whether the first condition set is met; sending a first wireless signal on the second cell; wherein the first timing advance command is applied to the first wireless signal.

[0322] As an embodiment, the first node N51 communicates with the second processor N52 through the first cell.

[0323] As an embodiment, the first node N51 communicates with the third processor N53 through the second cell.

[0324] As an embodiment, the second processor N52 and the third processor N53 belong to the same base station.

[0325] As an embodiment, the second processor N52 and the third processor N53 belong to different base stations.

[0326] As an embodiment, the second processor N52 and the third processor N53 belong to the same gNB-DU (Distributed Unit).

[0327] As an embodiment, the second processor N52 and the third processor N53 belong to two different gNB-DUs respectively, and the two different gNB-DUs are associated with the same gNB-CU (Central Unit).

[0328] As an embodiment, the second processor N52 and the third processor N53 belong to two different gNB-DUs respectively, and the two different gNB-DUs are associated with two different gNB-CUs.

[0329] As an embodiment, a base station includes a gNB-CU and at least one gNB-DU associated with the gNB-CU, and the gNB-CU is connected to any gNB-DU of the at least one gNB-DU through an F1 interface.

[0330] As an embodiment, the second processor N52 belongs to the base station of the first cell.

[0331] As an embodiment, the third processor N53 belongs to the base station of the second cell.

[0332] As an embodiment, the base station of the first cell and the base station of the second cell are the same base station.

[0333] As an embodiment, the base station of the first cell and the base station of the second cell are different base stations.

[0334] As an embodiment, the second cell is a switching candidate cell (candidate cell) of the first node.

[0335] As an embodiment, the second cell is an LTM candidate cell of the first node.

[0336] As an embodiment, a first RRC (Radio Resource Control) signaling is received.

[0337] As an embodiment, the first RRC signaling includes a candidate cell configuration IE (Information element).

[0338] As an embodiment, the first RRC signaling configures a candidate cell configuration for a candidate cell set.

[0339] As an embodiment, the first RRC signaling configures a candidate cell configuration for each candidate cell in the candidate cell set, and the candidate cell configuration is indicated by a configuration identifier.

[0340] As an embodiment, the candidate cell set is a CHO (Conditional Handover) candidate cell set.

[0341] As an embodiment, the candidate cell set is an LTM candidate cell set.

[0342] As an embodiment, the candidate cell configuration is a CHO candidate cell configuration.

[0343] As an embodiment, the candidate cell configuration is an LTM candidate cell configuration.

[0344] As an embodiment, the candidate cell configuration is a complete LTM candidate cell configuration.

[0345] As an embodiment, the candidate cell configuration is not a complete LTM candidate cell configuration.

[0346] As an embodiment, the first RRC signaling is RRCReconfiguration (RRC reconfiguration).

[0347] As an embodiment, the first RRC signaling includes condRRCReconfig (conditional RRC reconfiguration).

[0348] As an embodiment, the first RRC signaling includes ltm-ReferenceConfiguration (LTM reference configuration).

[0349] As an embodiment, the first RRC signaling includes LTM-Candidate.

[0350] As an embodiment, the first RRC signaling includes ltm-CandidateConfig (LTM candidate configuration).

[0351] As an embodiment, the ltm-CandidateConfig included in the first RRC signaling configures the complete LTM candidate cell configuration for the LTM candidate cell set.

[0352] As an embodiment, the ltm-ReferenceConfiguration included in the first RRC signaling and the ltm-CandidateConfig included in the first RRC signaling together generate the complete LTM candidate cell configuration and configure it to the LTM candidate cell set.

[0353] As an embodiment, the candidate cell set is configured according to the measurement report reported by the first node N51.

[0354] As an embodiment, the candidate cell set is configured by the second node.

[0355] As an embodiment, the candidate cell set is configured by the base station of the first cell.

[0356] As an embodiment, the second cell belongs to the candidate cell set.

[0357] As an embodiment, the candidate cell is used for cell switching.

[0358] As an embodiment, the candidate cell is used for CPC (Conditional PSCell Change, conditional primary SCG (Secondary Cell Group) cell change).

[0359] As an embodiment, the candidate cell is used for CPA (Conditional PSCell Addition, conditional SCG cell addition).

[0360] As an embodiment, the candidate cell is used for CHO.

[0361] As an embodiment, the candidate cell is used for cell switching of protocol layers below layer 3.

[0362] As an embodiment, the candidate cell is used for LTM.

[0363] As an embodiment, the first RRC signaling indicates the second cell.

[0364] As an embodiment, the first RRC signaling configures the candidate cell configuration for the second cell.

[0365] As an embodiment, the first RRC signaling includes the first configuration identifier, and the first configuration identifier indicates a candidate cell configuration, and the candidate cell configuration is for the second cell.

[0366] As an embodiment, the second cell is any candidate cell in a candidate cell set configured for the first node; wherein the candidate cell set configured for the first node includes at least one candidate cell.

[0367] As an embodiment, the first RRC signaling indicates the first threshold.

[0368] As an embodiment, the first RRC signaling includes the first threshold.

[0369] As an embodiment, the first RRC signaling includes the second threshold.

[0370] As an embodiment, the first RRC signaling indicates the first condition set.

[0371] As an embodiment, the first RRC signaling configures an event (event) in which conditional LTM is executed.

[0372] As an embodiment, after receiving the first RRC signaling, it starts to evaluate whether the first set of conditions is met.

[0373] As an embodiment, the phrase evaluating whether the first set of conditions is satisfied includes: performing channel measurement on each candidate cell in the candidate cell set to evaluate whether the first set of conditions is satisfied; wherein the second cell is any candidate cell in the candidate cell set.

[0374] As an embodiment, after receiving the first RRC signaling and before determining that the first condition set is met, the first node is in an RRC connected (RRC_connected) state.

[0375] As an embodiment, the first time is the earlier time of the time when the first condition set is satisfied after a first time length value and the time when the first signaling is received.

[0376] As an embodiment, the first time length value is configurable.

[0377] As an embodiment, the first time length value is network configured.

[0378] As an embodiment, the first time length value is preconfigured.

[0379] As an embodiment, the first time length value is implementation-dependent.

[0380] As an embodiment, the first time length value depends on whether the base station of the first cell and the base station of the second cell are the same base station.

[0381] As an embodiment, the first time length value depends on a backhaul network between a base station of the first cell and a base station of the second cell; wherein the base station of the first cell and the base station of the second cell are not the same base station.

[0382] As an embodiment, the first time length value is linearly related to the time required to transmit the first timing advance command between the base station of the first cell and the base station of the second cell.

[0383] As an embodiment, the first time length value is related to the time interval between when the first condition set is satisfied and when the first random access sequence is sent.

[0384] As a sub-embodiment of the above embodiment, when the first condition set is satisfied, the longer the time interval from sending the first random access sequence is, the smaller the first time length value is; when the first condition set is satisfied, the shorter the time interval from sending the first random access sequence is, the larger the first time length value is.

[0385] As an embodiment, the first node determines the first time length value by itself.

[0386] As an embodiment, the first time length value is a value not less than 0.

[0387] As an embodiment, the first time length value is a value greater than 0.

[0388] As an embodiment, the unit of the first time length value is a time slot.

[0389] As an embodiment, the unit of the first time length value is a subframe.

[0390] As an embodiment, the unit of the first time length value is milliseconds.

[0391] As an embodiment, the first signaling is received on the first cell; the first signaling is received after the first set of conditions is met and within a time interval of the first time length value after the first set of conditions is met.

[0392] As an embodiment, the first time is the time when the first signaling is received.

[0393] As an embodiment, the first time being the time when the first signaling is received means that the first time is not earlier than the time domain resources occupied by the first signaling.

[0394] As an embodiment, after the first set of conditions is met and before the first signaling is received, the first node continues to perform the first set of operations.

[0395] As an embodiment, after the first time, the first node starts to execute a second set of operations, and the second set of operations includes at least one of monitoring PDCCH on the second cell, monitoring PDCCH used to schedule the second cell, and sending PRACH on the second cell.

[0396] As an embodiment, a first wireless signal is sent on the second cell.

[0397] As an embodiment, the first wireless signal is triggered by the first signaling.

[0398] As an embodiment, the first wireless signal is sent via PUCCH.

[0399] As an embodiment, the first wireless signal is sent via PUSCH.

[0400] As an embodiment, the first wireless signal is a reference signal.

[0401] As an embodiment, the first wireless signal is an SRS (Sounding Reference Signal).

[0402] As an embodiment, the first wireless signal is not sent via PRACH.

[0403] As an embodiment, the first wireless signal is sent first after receiving the first signaling.

[0404] As an embodiment, the air interface resources occupied by the first wireless signal are indicated by the first signaling.

[0405] As an embodiment, the air interface resources occupied by the first wireless signal are preconfigured.

[0406] As an embodiment, the air interface resources occupied by the first wireless signal are scheduled by monitoring the PDCCH for the second cell.

[0407] As an embodiment, the air interface resources occupied by the first wireless signal are scheduled by a PDCCH monitored on the second cell.

[0408] As an embodiment, the air interface resources occupied by the first wireless signal belong to an uplink configured grant.

[0409] As an embodiment, the air interface resources include at least one of time domain resources, frequency domain resources, code domain resources or space resources.

[0410] As an embodiment, the first timing advance command is applied to the first wireless signal.

[0411] As an embodiment, the first timing advance command is applied to the first wireless signal, including: the first timing advance command is used to determine the first timing advance value, and the first timing advance value is the advance value of the starting time of the uplink time unit for sending the first wireless signal relative to the corresponding downlink time unit.

[0412] As a sub-embodiment of the above embodiment, the time unit is a frame, a subframe or a time slot.

[0413] As an embodiment, the first node obtains the downlink synchronization of the second cell according to the downlink synchronization signal; determines the first timing advance value as t according to the first timing advance command; if the uplink transmission time slot of the first wireless signal is n, the first node starts sending the first wireless signal at a time t before the start time of the corresponding downlink time slot n.

[0414] As an embodiment, the first timing advance command indicates the first timing advance value.

[0415] As an embodiment, the first timing advance value is related to the subcarrier of the first uplink transmission on the second cell after the first signaling is received.

[0416] As an embodiment, the first timing advance value is related to the subcarrier spacing of the first wireless signal.

[0417] As an embodiment, the first timing advance value N TA =T A ·16·64 / 2μ ; wherein the T A is the index included in the first timing advance command, the 2 μ ·15 kHz (kilohertz) is the subcarrier spacing (SCS) of the second cell.

[0418] As an example, the T A A positive integer less than 4096.

[0419] As an example, the T A The value of is 0,1,2,...,3846.

[0420] As an embodiment, μ is a positive integer not greater than 10.

[0421] As an embodiment, the value of μ is 0, 1, 2, 3, 4, 5, 6.

[0422] As an embodiment, when the base station of the first cell and the base station of the second cell are different base stations, the first timing advance command is obtained at the base station of the second cell, and then forwarded to the base station of the first cell through a backhaul network (backhaul), and sent to the first node by the second processor N52 through the first cell.

[0423] As a sub-embodiment of the above embodiment, the above method can reduce the communication interruption time with the first cell by not receiving the first timing advance command in the second cell.

[0424] As an embodiment, when the base station of the first cell and the base station of the second cell are different base stations, the candidate cell configuration of the second cell is configured by the base station of the second cell, and then forwarded to the base station of the first cell through the backhaul network, and sent to the first node by the second processor N52 through the first cell.

[0425] As an embodiment, when the base station of the first cell and the base station of the second cell are different base stations, the first random access sequence is configured by the base station of the second cell, and then forwarded to the base station of the first cell through the backhaul network, and sent to the first node by the second processor N52 through the first cell.

[0426] As an embodiment, when the base station of the first cell and the base station of the second cell are different base stations, the base station of the second cell determines the base station of the serving cell of the sender of the first random access sequence according to the received first random access sequence.

[0427] As an embodiment, when the base station of the first cell and the base station of the second cell are different base stations, the air interface resources occupied by the first wireless signal are configured by the base station of the second cell, and then forwarded to the base station of the first cell through the backhaul network, and sent to the first node by the second processor N52 through the first cell.

[0428] As an embodiment, the backhaul network is ideal.

[0429] As an embodiment, the backhaul network is non-ideal.

[0430] Example 6

[0431] Embodiment 6 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in the attached Figure 6 As shown in the attached Figure 6 In the embodiment, the first node N61 and the second processor N62 communicate via a wireless interface, and the first node N61 and the third processor N63 communicate via a wireless interface. It is particularly noted that the order in this example does not limit the signal transmission order and implementation order in this application. Embodiment 6 is applicable to the scenario where the first signaling is not received from the first cell.

[0432] for First node N61 , receiving a first RRC signaling in step S611; receiving a first DCI in step S612; sending a first random access sequence in step S613; determining that a first condition set is satisfied in step S614; stopping the first operation set from a first time in step S615; sending a second random access sequence in step S616; receiving a second timing advance command in step S617; and sending a first wireless signal in step S618.

[0433] for Second processor N62 , sending the first RRC signaling in step S621; sending the first DCI in step S622.

[0434] for The third processor N63 , receiving a first random access sequence in step S631; receiving a second random access sequence in step S632; sending a second timing advance command in step S633; and receiving a first wireless signal in step S634.

[0435] In embodiment 6, a first DCI is received on a first cell; as a response to receiving the first DCI, a first random access sequence is sent on a second cell; as a response to a first condition set being satisfied, a first operation set is stopped starting from a first time; wherein the first condition set includes that a channel quality of the first cell is worse than a first threshold; the first operation set includes monitoring a PDCCH (physical downlink control channel) on the first cell, monitoring a PDCCH used to schedule the first cell, and sending a PRACH (physical random access channel) on the first cell; the first time is after the first random access sequence is sent, and the first time depends on whether a first signaling is received from the first cell, and the first signaling includes a first Timing advance command, the first random access sequence is used to trigger the first timing advance command; the first time is the time after the time when the first condition set is met passes through the first time length value; wherein the first signaling is not received after the first condition set is met and within the time interval after the time when the first condition set is met passes through the first time length value; sending a second random access sequence on the second cell; receiving a second timing advance command on the second cell; wherein the second random access sequence is used to trigger the second timing advance command; the sending of the second random access sequence is no earlier than the first time; sending a first wireless signal on the second cell; wherein the second timing advance command is applied to the first wireless signal.

[0436] As an embodiment, when the first signaling is not received from the first cell after the first condition set is met and within a time interval from the time when the first condition set is met to the time when the first time set is met exceeding the first time length value, the first time is the time after the time when the first condition set is met exceeds the first time length value.

[0437] As an embodiment, after the first set of conditions is satisfied and within a time interval of the first time length value after the first set of conditions is satisfied, the first node continues to execute the first set of operations.

[0438] As an embodiment, a second random access sequence is sent on the second cell.

[0439] As an embodiment, when the first signaling is not received after the first condition set is met and within a time interval of the first time length value after the time when the first condition set is met, the second random access sequence is sent on the second cell.

[0440] As an embodiment, the first RRC signaling indicates the air interface resources for sending the second random access sequence.

[0441] As a sub-embodiment of the above embodiment, the first RRC signaling includes a RACH (Random Access CHannel)-ConfigDedicated (dedicated configuration) field.

[0442] As a sub-embodiment of the above embodiment, the first RRC signaling includes a UL / SUL indication.

[0443] As a sub-embodiment of the above embodiment, the first RRC signaling includes an SS / PBCH index.

[0444] As a sub-embodiment of the above embodiment, the first RRC signaling includes a PRACH mask index.

[0445] As a sub-embodiment of the above embodiment, the first RRC signaling includes an index of the second random access sequence.

[0446] As an embodiment, the second random access sequence is reserved for conditional LTM cell switching of the first node.

[0447] As an embodiment, the second random access sequence is selected from at least one contention-based random access sequence.

[0448] As an embodiment, the sending of the second random access sequence belongs to a 4-step random access process.

[0449] As an embodiment, the sending of the second random access sequence belongs to a 2-step random access process.

[0450] As an embodiment, the random access process to which the second random access sequence belongs is contention-based.

[0451] As an embodiment, the random access process to which the second random access sequence belongs is contention-free.

[0452] As an embodiment, the sending of the second random access sequence is no earlier than the first time.

[0453] As an embodiment, the sending of the second random access sequence is later than the first time.

[0454] As an embodiment, the second random access sequence is sent in the first SSB-RO (RACH occasion, random access channel occasion, or PRACH occasion, physical random access channel occasion) mapping cycle after the first time.

[0455] As an embodiment, after sending the second random access sequence, a random access response window (ra-ResponseWindow) starts, and a second timing advance command is monitored on the second cell while the random access response window is running.

[0456] As an embodiment, the second timing advance command is received on the second cell.

[0457] As an embodiment, the second timing advance command is carried in a random access response (Random Access Response, RAR).

[0458] As an embodiment, the second timing advance command is carried in MsgB (message B).

[0459] As an embodiment, the second timing advance command includes 12 bits.

[0460] As an embodiment, the second timing advance value is determined according to the second timing advance command.

[0461] As an embodiment, the second timing advance value determined according to the second timing advance command is an absolute value.

[0462] As an embodiment, the second timing advance value determined according to the second timing advance command is a relative value.

[0463] As an embodiment, the second timing advance command is an Absolute Timing Advance Command (absolute timing advance command) MAC CE.

[0464] As an embodiment, the second timing advance command is a Timing Advance Command (timing advance command) MAC CE.

[0465] As an embodiment, the second random access sequence is used to trigger the second timing advance command.

[0466] As an embodiment, the second random access sequence is used to trigger the second timing advance command, which means that the second timing advance command depends on the second random access sequence.

[0467] As an embodiment, the second random access sequence is used to trigger the second timing advance command, which means that the second timing advance command is a response to the second random access sequence.

[0468] As an embodiment, the second random access sequence is used to trigger the second timing advance command, which means that the sending of the second timing advance command must be caused by the sending of the second random access sequence.

[0469] As an embodiment, the second random access sequence is used to trigger the second timing advance command, including: the second random access sequence is used to generate the second timing advance command.

[0470] As an embodiment, the second timing advance command is for the second cell.

[0471] As an embodiment, the second timing advance command is applied to a TAG (timing advance group) to which the second cell belongs.

[0472] As an embodiment, the second timing advance command is used for uplink synchronization of the first node and the second cell.

[0473] As an embodiment, the second timing advance command is used for uplink synchronization when the first node performs uplink transmission on the second cell.

[0474] As an embodiment, the second timing advance command is valid.

[0475] As an embodiment, the first wireless signal is sent on the second cell.

[0476] As an embodiment, after receiving the second timing advance command, the first wireless signal is sent on the second cell.

[0477] As an embodiment, the air interface resources occupied by the first wireless signal are scheduled by monitoring the PDCCH for the second cell.

[0478] As an embodiment, the air interface resources occupied by the first wireless signal are scheduled by a PDCCH monitored on the second cell.

[0479] As an embodiment, the air interface resources occupied by the first wireless signal belong to an uplink configured grant.

[0480] As an embodiment, the second timing advance command is applied to the first wireless signal.

[0481] As an embodiment, the second timing advance command is applied to the first wireless signal, including: the second timing advance command is used to determine a second timing advance value, and the second timing advance value is an advance value of the start time of the uplink time unit for sending the first wireless signal relative to the corresponding downlink time unit.

[0482] As an embodiment, the second timing advance command indicates the second timing advance value.

[0483] As an embodiment, the second timing advance value N TA =T A ·16·64 / 2 μ ; wherein the T A is an index included in the second timing advance command, wherein the 2 μ ·15 kHz (kilohertz) is the subcarrier spacing (SCS) of the second cell.

[0484] Example 7

[0485] Embodiment 7 illustrates a schematic diagram of the relationship between the first condition set being satisfied, the first signaling, the first time, and the first time length value according to an embodiment of the present application, as shown in the attached figure. Figure 7 shown.

[0486] As an embodiment, the first signaling is received after the first set of conditions is satisfied and within a time interval of the first time length value after the first set of conditions is satisfied.

[0487] As an embodiment, the receiving time of the first signaling is earlier than the time after the first condition set is satisfied by the first time length value, and the first time is the time when the first signaling is received.

[0488] As an embodiment, after the first time, the first node stops the first set of operations.

[0489] As an embodiment, the first time is not earlier than the end time of the time domain resources occupied by the first signaling.

[0490] As an embodiment, the first time is the end time of the time domain resources occupied by the first signaling.

[0491] Example 8

[0492] Embodiment 8 illustrates a schematic diagram of the relationship between the first condition set being satisfied and the first time and the first time length value according to an embodiment of the present application, as shown in the attached figure. Figure 8 shown.

[0493] As an embodiment, the first signaling is not received from the first cell after the first condition set is met and within a time interval from the time when the first condition set is met to the first time length value, and the first time is the time after the time when the first condition set is met exceeds the first time length value.

[0494] As an embodiment, after the first time, the first node stops the first set of operations.

[0495] As an embodiment, when the first time is the time after the first condition set is satisfied for a period of time exceeding the first time length value, the first node stops monitoring the first signaling from the first cell.

[0496] Example 9

[0497] Embodiment 9 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. 9 As shown in the attached Fig. 9 In the embodiment, the first node processing device 9 comprises a first processor 901; the first node 900 is a UE.

[0498] In Example 9, a first processor 901 receives a first DCI on a first cell; in response to receiving the first DCI, sends a first random access sequence on a second cell; in response to a first condition set being satisfied, stops a first operation set starting from a first time; wherein the first condition set includes that a channel quality of the first cell is worse than a first threshold; the first operation set includes at least one of monitoring a PDCCH (physical downlink control channel) on the first cell, monitoring a PDCCH used to schedule the first cell, and sending a PRACH (physical random access channel) on the first cell; the first time is after the first random access sequence is sent, and the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

[0499] As an embodiment, the first time is the earlier of the time after the first time length value passes through the time when the first condition set is met and the time when the first signaling is received; wherein, the first time length value is configurable, or pre-configured, or implementation-related.

[0500] As an embodiment, the first processor 901 receives the first signaling on the first cell; wherein the first time is the time when the first signaling is received, and the first signaling is received after the first condition set is met and within a time interval of the first time length value after the time when the first condition set is met.

[0501] As an embodiment, the first time is the time after the first condition set is met and the first time length value has passed; wherein, the first signaling is not received within the time interval after the first condition set is met and the first condition set is met and the first time length value has passed.

[0502] As an embodiment, the first time is the time after the first condition set is met and the first time length value is exceeded; wherein, the first signaling is not received after the first condition set is met and within the time interval after the first condition set is met and the first time length value is exceeded; the first processor 901 sends a second random access sequence on the second cell; receives a second timing advance command on the second cell; wherein, the second random access sequence is used to trigger the second timing advance command; the second random access sequence is sent no earlier than the first time.

[0503] As an embodiment, the first time is the time after the first condition set is met and the first time length value is exceeded; wherein, the first signaling is not received after the first condition set is met and within the time interval after the first condition set is met and the first time length value is exceeded; the first processor 901 sends a second random access sequence on the second cell; receives a second timing advance command on the second cell; wherein the second random access sequence is used to trigger the second timing advance command; the second random access sequence is sent no earlier than the first time; the first processor 901 sends a first wireless signal on the second cell; wherein the second timing advance command is applied to the first wireless signal.

[0504] As an embodiment, the first processor 901 sends a first wireless signal on the second cell; wherein the first timing advance command is applied to the first wireless signal.

[0505] As an embodiment, the first processor 901 receives a first RRC signaling, the first RRC signaling configures a candidate cell set, and the second cell belongs to the candidate cell set; after receiving the first RRC signaling, it starts to evaluate whether the first condition set is met.

[0506] As an embodiment, the first processor 901 includes the attached Figure 4 The receiver 454 (including antenna 452), receive processor 456, multi-antenna receive processor 458 and controller / processor 459.

[0507] As an embodiment, the first processor 901 includes the attached Figure 4 At least one of the receiver 454 (including antenna 452), receive processor 456, multi-antenna receive processor 458 or controller / processor 459.

[0508] As an embodiment, the first processor 901 includes the attached Figure 4 The transmitter 454 (including antenna 452), transmit processor 468, multi-antenna transmit processor 457 and controller / processor 459.

[0509] As an embodiment, the first processor 901 includes the attached Figure 4 At least one of the receiver 454 (including antenna 452), transmit processor 468, multi-antenna transmit processor 457 or controller / processor 459.

[0510] Example 10

[0511] Embodiment 10 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.10 As shown in the attached Fig.10 In the figure, the dotted box indicates that it is optional, the second node processing device 1000 includes a second processor 1001, or the second node processing device 1000 includes a third processor 1002, or the second node processing device 1000 includes a second processor 1001 and a third processor 1002; the second node 1000 is a base station.

[0512] In embodiment 10, the second processor 1001 sends a first DCI on a first cell, and the first DCI is used to trigger sending a first random access sequence on a second cell; wherein a first condition set is satisfied and is used to trigger stopping a first operation set from a first time, and the first condition set includes that a channel quality of the first cell is worse than a first threshold; the first operation set includes monitoring a PDCCH (physical downlink control channel) on the first cell, monitoring a PDCCH used for scheduling the first cell, and sending a PRACH (physical random access channel) on the first cell; the first time is after the first random access sequence is sent, and the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command; or , a third processor 1002 receives a first random access sequence on a second cell, wherein the first random access sequence is triggered by a first DCI; wherein the first DCI is received on the first cell; a first condition set is satisfied and is used to trigger stopping a first operation set from a first time, wherein the first condition set includes that a channel quality of the first cell is worse than a first threshold; the first operation set includes monitoring a PDCCH (physical downlink control channel) on the first cell, monitoring a PDCCH used for scheduling the first cell, and sending a PRACH (physical random access channel) on the first cell; the first time is after the first random access sequence is sent, and the first time depends on whether a first signaling is received from the first cell, wherein the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

[0513] As an embodiment, the second node includes the second processor 1001 and the third processor 1002 .

[0514] As an embodiment, the first time is the earlier of the time after the first time length value passes through the time when the first condition set is met and the time when the first signaling is received; wherein, the first time length value is configurable, or pre-configured, or implementation-related.

[0515] As an embodiment, the second processor 1001 sends the first signaling on the first cell; wherein the first time is the time when the first signaling is received, and the first signaling is received after the first condition set is met and within a time interval of the first time length value after the time when the first condition set is met.

[0516] As an embodiment, the first time is the time after the first condition set is met and the first time length value has passed; wherein, the first signaling is not received within the time interval after the first condition set is met and the first condition set is met and the first time length value has passed.

[0517] As an embodiment, the first time is the time after the first condition set is met and the first time length value is exceeded; wherein, the first signaling is not received after the first condition set is met and within the time interval after the first condition set is met and the first time length value is exceeded; the third processor 1002 receives a second random access sequence on the second cell; sends a second timing advance command on the second cell; wherein, the second random access sequence is used to trigger the second timing advance command; the reception of the second random access sequence is no earlier than the first time.

[0518] As an embodiment, the first time is the time after the first condition set is met and the first time length value is exceeded; wherein, the first signaling is not received after the first condition set is met and within the time interval after the first condition set is met and the first time length value is exceeded; the third processor 1002 receives a second random access sequence on the second cell; sends a second timing advance command on the second cell; wherein the second random access sequence is used to trigger the second timing advance command; the reception of the second random access sequence is no earlier than the first time; the third processor 1002 receives a first wireless signal on the second cell; wherein the second timing advance command is applied to the first wireless signal.

[0519] As an embodiment, the third processor 1002 receives a first wireless signal on the second cell; wherein the first timing advance command is applied to the first wireless signal.

[0520] As an embodiment, the second processor 1001 sends a first RRC signaling, wherein the first RRC signaling configures a candidate cell set, and the second cell belongs to the candidate cell set; wherein, after the first RRC signaling is received, whether the first condition set is met is evaluated.

[0521] As an embodiment, the second processor 1001 includes the attached Figure 4 The transmitter 418 (including antenna 420), transmit processor 416, multi-antenna transmit processor 471 and controller / processor 475.

[0522] As an embodiment, the second processor 1001 includes the attached Figure 4 At least one of the transmitter 418 (including antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 or the controller / processor 475.

[0523] As an embodiment, the third processor 1002 includes the attached Figure 4 The transmitter 418 (including antenna 420), transmit processor 416, multi-antenna transmit processor 471 and controller / processor 475.

[0524] As an embodiment, the third processor 1002 includes the attached Figure 4 At least one of the transmitter 418 (including antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 or the controller / processor 475.

[0525] As an embodiment, the third processor 1002 includes the attached Figure 4 The receiver 418 (including antenna 420), receive processor 470, multi-antenna receive processor 472 and controller / processor 475.

[0526] As an embodiment, the third processor 1002 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.

[0527] A person of ordinary skill in the art can understand that all or part of the steps in the above method can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk or an optical disk. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment can be implemented in the form of hardware or in the form of a software function module, and the present application is not limited to any specific form of software and hardware combination. The 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, 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 type of communication node or base station or network side equipment in the present application includes but is not limited to macrocellular base stations, microcellular base stations, home base stations, relay base stations, eNB, gNB, transmission and reception nodes TRP (Transmission and Reception Point, transmission and reception point), relay satellites, satellite base stations, aerial base stations and other wireless communication equipment.

[0528] The above is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A first node used for wireless communication, characterized in that: include: A first processor receives a first DCI on a first cell; In response to receiving the first DCI, sending a first random access sequence on the second cell; In response to the first set of conditions being satisfied, stopping the first set of operations starting at a first time; Among them, the first condition set includes that the channel quality of the first cell is worse than a first threshold; 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; the first time is after the first random access sequence is sent, and the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

2. The first node according to claim 1, characterized in that: The first time is the earlier time of the time when the first condition set is satisfied after a first time length value and the time when the first signaling is received; The first time length value is configurable, or preconfigured, or implementation-related.

3. The first node according to claim 1 or 2, characterized in that: The first processor receives the first signaling on the first cell; The first time is the time when the first signaling is received, and the first signaling is received after the first condition set is satisfied and within a time interval of the first time length value from the time when the first condition set is satisfied.

4. The first node according to claim 1 or 2, characterized in that: The first time is the time after the first condition set is satisfied for a period of time equal to the first time length; The first signaling is not received after the first condition set is met and within a time interval of the first time length value after the first condition set is met.

5. The first node according to claim 4, characterized in that: include: The first processor sends a second random access sequence on the second cell; receiving a second timing advance command on the second cell; The second random access sequence is used to trigger the second timing advance command; and the second random access sequence is sent no earlier than the first time.

6. The first node according to claim 5, characterized in that: include: The first processor sends a first wireless signal on the second cell; The first timing advance command or the second timing advance command is applied to the first wireless signal.

7. The first node according to any one of claims 1 to 6, characterized in that: include: The first processor receives a first RRC signaling, where the first RRC signaling is a candidate cell set configuration for a candidate cell, and the second cell belongs to the candidate cell set; After receiving the first RRC signaling, it starts to evaluate whether the first condition set is met.

8. A second node used for wireless communication, characterized in that: include: A second processor sends a first DCI on a first cell, where the first DCI is used to trigger sending a first random access sequence on a second cell; The first condition set is satisfied and is used to trigger stopping of the first operation set from a first time, the first condition set includes that the channel quality of the first cell is worse than a first threshold; the first operation set includes 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. At least one of the three; the first time is after the first random access sequence is sent, the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command; or, A third processor receives a first random access sequence on a second cell, where the first random access sequence is triggered by a first DCI; Among them, the first DCI is received on the first cell; the first condition set is satisfied and is used to trigger the stopping of the first operation set from the first time, the first condition set includes that the channel quality of the first cell is worse than a first threshold; 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; the first time is after the first random access sequence is sent, the first time depends on whether the first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

9. The second node according to claim 8, characterized in that: The second node includes the second processor and the third processor.

10. A method in a first node for wireless communication, characterized in that: include: Receiving a first DCI on a first cell; In response to receiving the first DCI, sending a first random access sequence on the second cell; In response to the first set of conditions being satisfied, stopping the first set of operations starting at a first time; Among them, the first condition set includes that the channel quality of the first cell is worse than a first threshold; 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; the first time is after the first random access sequence is sent, and the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

11. A method in a second node for wireless communication, characterized in that: include: Sending a first DCI on a first cell, where the first DCI is used to trigger sending a first random access sequence on a second cell; The first condition set is satisfied and is used to trigger stopping of the first operation set from a first time, the first condition set includes that the channel quality of the first cell is worse than a first threshold; the first operation set includes 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. At least one of the three; the first time is after the first random access sequence is sent, the first time depends on whether a first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command; or, Receiving a first random access sequence on a second cell, where the first random access sequence is triggered by a first DCI; Among them, the first DCI is received on the first cell; the first condition set is satisfied and is used to trigger the stopping of the first operation set from the first time, the first condition set includes that the channel quality of the first cell is worse than a first threshold; 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; the first time is after the first random access sequence is sent, the first time depends on whether the first signaling is received from the first cell, the first signaling includes a first timing advance command, and the first random access sequence is used to trigger the first timing advance command.

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