Methods and apparatus used for wireless communication

Abstract

This application discloses a method and apparatus used for wireless communication. A first node receives a first RRC signaling, which indicates a DRX active time, and the DRX active time is applied to at least a second cell. The first node receives a first signaling, which is a first signaling, which commands switching to a second cell. The second cell monitors the PDCCH during the DRX active time, and the DRX active time depends on the first signaling, which is a lower-layer signaling. This application can effectively reduce cell switching delays.

Description

Technical Field

[0001] This application relates to methods and apparatuses in a wireless communication system, and particularly to methods and apparatuses for supporting discontinuous reception (DRX) in wireless communication.

Background Art

[0002] DRX is a commonly used method in wireless communication, which can reduce the power consumption of a communication terminal and increase the standby time. The base station controls the timer related to DRX by downlink control information (DCI) or media access control (MAC) control element (CE), thereby controlling whether the terminal is in the active time within a given slot or subframe. When the terminal is in the active time, the terminal monitors and receives wireless signals, and when the terminal is in the inactive time, the terminal stops monitoring wireless signals, further controlling wireless reception at the communication terminal.

[0003] When a user equipment (UE) moves from the coverage area of one cell to the coverage area of another cell, it is necessary to change the serving cell of the UE. In the prior art, serving cell change is usually triggered by layer 3 (L3) measurement and implemented by reconfiguration with synchronization triggered by radio resource control (RRC) signaling. The serving cell change implemented by L3 has the characteristics of long delay, large signaling overhead, and long interruption time. To overcome the above drawbacks, at the 94th plenary session of the 3rd Generation Partnership Project (3GPP) Radio Access Network (RAN), it was decided to start the standardization work of a work item (WI) related to layer 1 / layer 2 (L1 / L2) based mobility enhancement technology. The design objective of the L1 / L2 based mobility enhancement technology is to achieve fast switching of the UE serving cell.

Summary of the Invention

[0004] Through research, the inventors concluded that there is a need to study how to support DRX in L1 / L2-based mobility enhancement scenarios. In view of the above problem, this application discloses a solution. Where there is no contradiction, the embodiments and features in the embodiments of the first node of this application can be applied to the second node, and vice versa. Where there is no contradiction, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other. Furthermore, although the original intent of this application is to target the Uu air interface, this application can also be used for the PC5 interface. Furthermore, while the initial intent of this application is to address enhanced mobility as a typical scenario or example, this application is also applicable to other scenarios facing similar problems and achieving similar technical effects, including but not limited to, other scenarios requiring mobility support, such as multi-antenna systems, multi-TRP (transmit / receive point) systems, capacity expansion systems, short-range wireless communication systems, unlicensed frequency band communications, Internet of Things (IoT), ultra-high reliability low-latency communications (URLLC) networks, Internet of Vehicles (IoV) communications, relay communications, dual connectivity (DC), and multi-connectivity (MC). Moreover, using a unified solution for different scenarios (including but not limited to cellular communication scenarios between terminals and base stations) also helps reduce hardware complexity and cost. In particular, for explanations of terms, nouns, functions, and variables in this application (unless otherwise specified), refer to the definitions in the 3GPP TS38 and TS37 series specifications.

[0005] This application discloses a method in a first node used for wireless communication, the method being A first RRC signaling, which indicates the DRX active time, is applied to at least a second cell, and the first RRC signaling is received. The first signaling, which indicates a switch to the second cell, is received in the first cell, This includes monitoring PDCCH in the second cell during the DRX active time, The DRX active time depends on the first signaling, which is a lower-layer signaling.

[0006] In one embodiment, in the above method, a first RRC signaling indicating the DRX active time can effectively support power saving of the UE.

[0007] In one embodiment, in the above method, the first signaling, which is a lower-layer signaling, is configured to enable high-speed cell switching.

[0008] In one embodiment, in the above method, the DRX active time dependent on the first signaling can effectively reduce cell switching delay.

[0009] In one embodiment, in the above method, the DRX active time dependent on the first signaling can reduce the risk of cell switching failure.

[0010] In one embodiment, in the above method, the DRX active time dependent on the first signaling can be increased to complete cell switching in a timely manner.

[0011] In one embodiment, the DRX active time dependent on the first signaling in the above method improves the flexibility of system processing.

[0012] According to one aspect of this application, the method is Includes a DRX active time dependent on the first signaling, which includes a DRX active time that begins when the first signaling is received.

[0013] In one embodiment, the above method can avoid entering DRX inactive time, monitor the physical downlink control channel (PDCCH) in a timely manner, and reduce cell switching delays.

[0014] According to one aspect of this application, the method is A second signaling, which includes transmitting a second signaling in the first cell, indicating that the first signaling was successfully received, The DRX active time dependent on the first signaling includes the DRX active time that begins when the transmission of the second signaling is completed. In one embodiment, the above method can avoid entering a DRX inactive time, monitor the PDCCH in a timely manner, and reduce cell switching delays.

[0015] According to one aspect of this application, the method is This includes a DRX active time that depends on the first signaling, which includes a DRX active time that starts when the configuration of the second cell is applied, and the first signaling indicates that the configuration of the second cell is applied.

[0016] In one embodiment, the above method avoids entering the DRX inactive period, and PDC By monitoring the CH in a timely manner, cell switching delays can be reduced.

[0017] According to one aspect of this application, the method is A second RRC signaling, comprising transmitting a second RRC signaling in a second cell, indicating that RRC reconfiguration is complete. The PDCCH is monitored, and the PDCCH indicates a time-frequency resource occupied by the second RRC signaling.

[0018] In one embodiment, in the above method, a normal network cell switchover is indicated by the transmission of a second RRC signaling.

[0019] As one embodiment, in the above method, transmitting the second RRC signaling via the time-frequency resources scheduled by PDCCH can accelerate the cell switching process, reduce the cell switching delay, and reduce the service interruption caused by cell switching.

[0020] According to one aspect of the present application, the method includes a first signaling that indicates the timing advance value of the second cell and does not trigger the transmission of a random access preamble in the second cell.

[0021] As one embodiment, in the above method, the first signaling indicating the timing advance value of the second cell can accelerate the cell switching process, reduce the cell switching delay, and reduce the service interruption caused by cell switching.

[0022] As one embodiment, in the above method, the first signaling indicating the timing advance value of the second cell can simplify the random access procedure.

[0023] As one embodiment, in the above method, the first signaling indicating the timing advance value of the second cell enables the first node to omit obtaining uplink synchronization with the second cell by a random access procedure during the switching process.

[0024] As one embodiment, in the above method, the first signaling indicating the timing advance value of the second cell can save signaling overhead.

[0025] As one embodiment, in the above method, the first signaling that does not trigger the transmission of a random access preamble in the second cell can accelerate the cell switching process, reduce the cell switching delay, and reduce the service interruption caused by cell switching.

[0026] According to one aspect of the present application, the method includes receiving a third signaling before receiving a first signaling, and in response to receiving the third signaling, transmitting a first random access preamble in a second cell, where the first random access preamble is used to determine the timing advance value of the second cell.

[0027] As an embodiment, in the above method, triggering the transmission of the first random access preamble before cell switching enables the network to pre-acquire the timing advance value of the uplink transmission of the first node to the second cell, thereby accelerating the cell switching process.

[0028] The present application discloses a method in a second node used for wireless communication, the method including transmitting a first RRC signaling indicating a DRX active time, where the DRX active time is at least applicable to a second cell, and transmitting, in a first cell, a first signaling indicating a switch to a second cell. The PDCCH is monitored during the DRX active time in the second cell, where the DRX active time depends on the first signaling, and the first signaling is lower layer signaling.

[0029] According to one aspect of the present application, the method includes a DRX active time that depends on the first signaling, including a DRX active time that starts when the first signaling is received.

[0030] According to one aspect of the present application, the method includes receiving, in a first cell, a second signaling indicating that the first signaling has been correctly received. The DRX active time dependent on the first signaling includes the DRX active time that begins when the transmission of the second signaling is complete.

[0031] According to one aspect of this application, the method is This includes a DRX active time dependent on the first signaling, which includes a DRX active time that starts when the configuration of the second cell is applied, The first signaling indicates that the configuration of the second cell is applied.

[0032] According to one aspect of this application, the method is Includes a first signaling that indicates the timing advance value of the second cell and does not trigger the transmission of a random access preamble in the second cell.

[0033] According to one aspect of this application, the method is This includes sending a third signaling signal before sending a first signaling signal, The third signaling is used to trigger the transmission of the first random access preamble in the second cell, and the first random access preamble is used to determine the timing advance value of the second cell.

[0034] According to one aspect of this application, the method is Receiving a first message, which includes receiving a first message indicating the timing advance value of a second cell.

[0035] In one embodiment, the transmitter of the first message and the receiver of the first random access preamble are located in the same place.

[0036] In one embodiment, the timing advance value of the second cell indicated in the first message is used to generate the timing advance value of the second cell indicated in the first signaling.

[0037] In one embodiment, obtaining the timing advance value of the second cell via the first message and the first signaling in the above method simplifies the UE receiving function. It is possible.

[0038] According to one aspect of this application, the method is Sending a second message, which includes sending a second message indicating a switch to a second cell.

[0039] In one embodiment, the second message is sent after the first signaling.

[0040] In one embodiment, the receiver for the second message and the transmitter for the PDCCH are located in the same place.

[0041] In one embodiment, in the above method, cell switching can be instructed to the base station of the target cell in a timely manner via a second message.

[0042] This application discloses a method in a third node used for wireless communication, the method being This includes receiving the first random access preamble in the second cell, A first random access preamble is used to determine the timing advance value of the second cell, a first RRC signaling is received, the first RRC signaling indicates DRX active time, the DRX active time is applied to at least the second cell, a first signaling is received in the first cell, the first signaling indicates a switch to the second cell, PDCCH is monitored in the second cell during DRX active time, the DRX active time depends on the first signaling, the first signaling is a lower layer signaling, a third signaling is received before the first signaling is received, and the third signaling is used to trigger the transmission of the first random access preamble.

[0043] According to one aspect of this application, the method is Includes a DRX active time dependent on the first signaling, which includes a DRX active time that begins when the first signaling is received.

[0044] According to one aspect of this application, the method is This includes a DRX active time dependent on the first signaling, which begins when the transmission of the second signaling is complete. The second signaling is received in the first cell, and the second signaling indicates that the first signaling was received correctly.

[0045] According to one aspect of this application, the method is This includes a DRX active time dependent on the first signaling, which includes a DRX active time that starts when the configuration of the second cell is applied, The first signaling indicates that the configuration of the second cell is applied.

[0046] According to one aspect of this application, the method is Sending PDCCH in the second cell, A second RRC signaling, which includes receiving a second RRC signaling in a second cell indicating that RRC reconstruction is complete, PDCCH indicates the time-frequency resources occupied by the second RRC signaling.

[0047] According to one aspect of this application, the method is Includes a first signaling that indicates the timing advance value of the second cell and does not trigger the transmission of a random access preamble in the second cell.

[0048] According to one aspect of this application, the method is Sending a first message, which includes sending a first message indicating the timing advance value of a second cell.

[0049] According to one aspect of this application, the method is Receiving a second message, which includes receiving a second message indicating a switch to a second cell.

[0050] This application discloses a first node used for wireless communication, the first node being, A first receiver receives a first RRC signaling, which indicates a DRX active time, and which is applied to at least a second cell, and receives a first signaling, which indicates a switch to a second cell, in the first cell, and monitors the PDCCH in the second cell during the DRX active time, The DRX active time depends on the first signaling, which is a lower-layer signaling.

[0051] This application discloses a second node used for wireless communication, the second node being, A second transmitter comprises a first RRC signaling that transmits a first RRC signaling indicating DRX active time, the DRX active time being applied to at least a second cell, and a first signaling that transmits a first signaling in the first cell indicating switching to the second cell. PDCCH is monitored in the second cell during DRX active time, and DRX active time depends on the first signaling, which is a lower-layer signaling.

[0052] This application discloses a third node for wireless communication, the third node being, A first random access preamble, used to determine the timing advance value of a second cell, comprises a third receiver that receives the first random access preamble in the second cell. A first RRC signaling indicates DRX active time, which is applied to at least a second cell, the first RRC signaling is received, the first signaling is received in the first cell, the first signaling indicates a switch to the second cell, the PDCCH is monitored in the second cell during DRX active time, the DRX active time depends on the first signaling, the first signaling is a lower layer signaling, the third signaling is received before the first signaling is received, and the third signaling is used to trigger the transmission of a first random access preamble.

[0053] Other features, purposes, and advantages of this application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. [Brief explanation of the drawing]

[0054] [Figure 1] A flowchart illustrating signal processing at the first node according to one embodiment of this application is provided. [Figure 2] A schematic diagram of a network architecture according to one embodiment of this application is provided as an example. [Figure 3] A schematic diagram illustrating a user plane and control plane radio protocol architecture according to one embodiment of this application is provided. [Figure 4] A schematic diagram of a hardware module for a communication device according to one embodiment of this application is provided as an example. [Figure 5] A flowchart illustrating wireless signal transmission according to one embodiment of this application is provided as an example. [Figure 6] A flowchart illustrating signal transmission in a backhaul network according to one embodiment of this application is provided. [Figure 7] A schematic diagram illustrating the DRX active time according to one embodiment of this application is provided. [Figure 8] A schematic diagram illustrating the DRX active time according to one embodiment of this application is provided. [Figure 9] A schematic diagram illustrating the DRX active time according to one embodiment of this application is provided. [Figure 10] A structural block diagram of a processing unit in the first node according to one embodiment of this application is provided as an example. [Figure 11] A structural block diagram of the processing unit in the second node according to one embodiment of this application is provided as an example. [Figure 12] A structural block diagram of the processing unit in the third node according to one embodiment of this application is provided as an example. [Modes for carrying out the invention]

[0055] The technical solutions of this application are described in further detail below, in conjunction with the drawings. It should be noted that, where there is no inconsistency, the embodiments and features of this application can be arbitrarily combined with each other.

[0056] Embodiment 1 Embodiment 1, as shown in Figure 1, illustrates a flowchart of signal processing at a first node according to one embodiment of the present application.

[0057] In Embodiment 1, the first node 100 receives a first RRC signaling in step 101, the first RRC signaling indicates DRX active time, which is applied to at least the second cell, receives a first signaling in the first cell in step 102, the first signaling indicates a switch to the second cell, monitors the PDCCH in the second cell during DRX active time in step 103z2, the DRX active time depends on the first signaling, which is a lower layer signaling.

[0058] In one embodiment, the first RRC signaling is received.

[0059] In one embodiment, the first RRC signaling is received in the first cell.

[0060] In one embodiment, the first RRC signaling is received in the serving cell of the first node.

[0061] In one embodiment, the serving cell of the first node includes a special cell (SpCell).

[0062] In one embodiment, the serving cell of the first node includes secondary cells (SCells).

[0063] In one embodiment, the serving cell of the first node includes the first cell.

[0064] In one embodiment, the first RRC signaling is RRCReconfiguration.

[0065] In one embodiment, the first RRC signaling includes a candidate configuration.

[0066] In one embodiment, the first RRC signaling includes a reference configuration.

[0067] In one embodiment, the first RRC signaling includes a candidate target configuration.

[0068] In one embodiment, the first RRC signaling includes a candidate delta configuration.

[0069] In one embodiment, the first RRC signaling includes a CellGroupConfig field, where the CellGroupConfig field constitutes at least one candidate cell.

[0070] In one embodiment, a first RRC signaling is used to constitute at least one switching candidate cell, and the at least one switching candidate cell includes a second cell.

[0071] In one embodiment, a first RRC signaling is used to configure the air interface resources of at least one switching candidate cell, and the at least one switching candidate cell includes a second cell.

[0072] In one embodiment, the first RRC signaling indicates the second cell.

[0073] In one embodiment, the first RRC signaling includes the identity of the second cell.

[0074] In one embodiment, the first RRC signaling is used to constitute the second cell.

[0075] In one embodiment, the first RRC signaling is used to configure the air interface resources of the second cell.

[0076] In one embodiment, the first RRC signaling is used to configure the unicast radio network temporary identifier (RNTI) of the first node in the second cell.

[0077] In one embodiment, the first RRC signaling is used to configure the cell (C)-RNTI of the first node in the second cell.

[0078] In one embodiment, the first RRC signaling is used to configure an air interface resource that performs a random access procedure in the second cell.

[0079] In one embodiment, the first RRC signaling is used to configure the media access control (MAC) parameters of at least the second cell.

[0080] In one embodiment, the first RRC signaling indicates the DRX active time.

[0081] In one embodiment, the first RRC signaling includes a drx-Config (intermittent reception configuration) field, where the drx-Config field configures DRX-related parameters. The DRX-related parameters indicate the DRX active time.

[0082] In one embodiment, the first RRC signaling includes configuring a DRX-on duration timer (drx-onDurationTimer) and configuring the expiration value of the DRX-on duration timer.

[0083] In one embodiment, the DRX active time includes the time during which the DRX on duration timer is running.

[0084] In one embodiment, the first RRC signaling includes configuring a DRX inactivity timer (drx-InactivityTimer) and configuring the expiration value of the DRX inactivity timer.

[0085] In one embodiment, the DRX active time includes the time during which the DRX non-activity timer is running.

[0086] In one embodiment, the first RRC signaling includes configuring a DRX downlink retransmission timer (drx-RetransmissionTimerDL) and configuring the expiration value of the DRX downlink retransmission timer.

[0087] In one embodiment, the DRX active time includes the time during which the DRX downlink retransmission timer is running in any serving cell.

[0088] In one embodiment, the first RRC signaling includes configuring a DRX uplink retransmission timer (drx-RetransmissionTimerUL) and configuring the expiration value of the DRX uplink retransmission timer.

[0089] In one embodiment, the DRX active time includes the time during which the DRX uplink retransmission timer is running on any serving cell.

[0090] In one embodiment, the first RRC signaling comprises a DRX long cycle and a start offset (drx-LongCycleStartOffset).

[0091] In one embodiment, the first RRC signaling constitutes a DRX short cycle (drx-ShortCycle).

[0092] In one embodiment, the first RRC signaling constitutes a DRX short-cycle timer (drx-ShortCycleTimer).

[0093] In one embodiment, the first RRC signaling constitutes a DRX slot offset (drx-SlotOffset).

[0094] In one embodiment, the DRX on duration timer is executed periodically according to DRX-related parameters configured by a first RRC signaling.

[0095] In one embodiment, when a PDCCH indicating a new transmission is received, the DRX non-activity timer is started or restarted.

[0096] In one embodiment, one timer is in an running state after being started or restarted, and when one timer is in an running state, one timer is updated at each time interval, and one timer After the period expires, updating one timer at each time interval will stop.

[0097] In one embodiment, when one timer is started, the value of one timer is set to 0, and the phrase "update one timer" includes increasing the value of one timer by 1, and when the value of one timer is the expiration value of one timer, one timer expires.

[0098] In one embodiment, when one timer is started, the value of one timer is set to the expiration value of one timer, and the phrase "updating one timer" includes decreasing the value of one timer by 1, and when the value of one timer is 0, one timer expires.

[0099] In one embodiment, the DRX active time includes the time during which the ra-ContentionResolutionTimer (Random Access Conflict Resolution Timer) or the msgB-ResponseWindow (Message B Response Window) is running.

[0100] In one embodiment, the DRX active time includes the time during which a scheduling request (SR) is transmitted on the physical uplink control channel (PUCCH) and is in a waiting state.

[0101] In one embodiment, the DRX active time includes the time after a random access response has been successfully received, indicating a new transmission, and before a PDCCH identified by C-RNTI has been received, and the random access preamble of the random access response is not selected by the MAC entity from a contention-based random access preamble.

[0102] In one embodiment, the DRX active time is applied to at least the second cell.

[0103] In one embodiment, the DRX active time is configured for multiple cells, and the second cell is one of the multiple cells. In one embodiment, the multiple cells form a single DRX group.

[0104] In one embodiment, the DRX active time is applied to the DRX group.

[0105] In one embodiment, the DRX active time applied to at least a second cell means that the PDCCH is monitored in at least a second cell during the DRX active time.

[0106] In one embodiment, the first signaling is received in the first cell.

[0107] In one embodiment, the first cell is a primary cell (PCell).

[0108] In one embodiment, the first cell is a special cell (SpCell).

[0109] In one embodiment, the first cell is a source cell.

[0110] In one embodiment, receiving in a cell means receiving via the cell's air interface resource.

[0111] In one embodiment, sending in a cell means sending via the cell's air interface resource.

[0112] In one embodiment, the air interface resource includes at least one of a time-domain resource, a frequency-domain resource, a spatial-domain resource, and a code-domain resource.

[0113] In one embodiment, the first signaling is lower-layer signaling.

[0114] In one embodiment, the first signaling is the signaling of the protocol layer below the RRC sublayer.

[0115] In one embodiment, the first signaling is physical layer signaling.

[0116] In one embodiment, the first signaling is DCI.

[0117] In one embodiment, the first signaling is media access control (MAC) sublayer signaling.

[0118] In one embodiment, the first signaling is a MAC control element (CE).

[0119] In one embodiment, the first signaling is cell switching signaling.

[0120] In one embodiment, the name of the first signaling includes L1 / L2 trigger mobility (LTM, Layer 1 / Layer 2 trigger mobility).

[0121] In one embodiment, the name of the first signaling includes switching.

[0122] In one embodiment, the first signaling is LTM cell switching.

[0123] In one embodiment, the first signaling indicates a switch to the second cell.

[0124] In one embodiment, the first signaling is a MAC CE, and the first signaling is identified by a logical channel ID (LCID), which indicates cell switching.

[0125] In one embodiment, the logical channel ID is a positive integer between 35 and 46 (including 35 and 46).

[0126] In one embodiment, the logical channel ID is a positive integer between 0 and 226 (including 0 and 226).

[0127] In one embodiment, the first signaling indicates the second cell.

[0128] In one embodiment, the first signaling includes the identity of the second cell.

[0129] In one embodiment, the first signaling includes one cell identity, and the one cell identity is used to identify a second cell.

[0130] In one embodiment, a cell identity is a physical cell identity.

[0131] In one embodiment, one cell identity is a serving cell index. ru.

[0132] In one embodiment, one cell identity is a candidate cell index.

[0133] In one embodiment, one cell identity is the target cell index.

[0134] In one embodiment, the identity of a second cell included in the first signaling is the same as the identity of a second cell included in the first RRC signaling.

[0135] In one embodiment, the first cell and the second cell belong to the same novel air interface node B(gNB)-distributed unit (DU).

[0136] In one embodiment, the first cell and the second cell belong to different gNB-DUs.

[0137] In one embodiment, the first cell and the second cell belong to the same gNB-centralized unit (CU).

[0138] In one embodiment, the first cell and the second cell belong to different gNB-CUs.

[0139] In one embodiment, the second cell is the serving cell of the first node.

[0140] In one embodiment, the first signaling indicates the exchange of a special cell and a secondary cell in the first node, and before receiving the first signaling, the first cell is a SpCell and the second cell is an SCell.

[0141] In one embodiment, the second cell is not the serving cell of the first node.

[0142] In one embodiment, the second cell is a candidate cell for cell switching.

[0143] In one embodiment, the second cell is the target cell for cell switching.

[0144] In one embodiment, the first signaling indicates the beam selected for the second cell.

[0145] In one embodiment, the selected beam is used for downlink reception and uplink transmission in a second cell.

[0146] In one embodiment, the first signaling indicates the transmit configuration indicator (TCI) state of the second cell.

[0147] In one embodiment, the PDCCH is monitored in a second cell during the DRX active time.

[0148] In one embodiment, the meanings of "monitor," "monitors," "monitoring," and "monitored" encompass the act of searching (searching).

[0149] As one embodiment, the meanings of monitor / monitors / monitoring / monitored are: It includes the act of watching (surveillance).

[0150] In one embodiment, the phrase "monitoring PDCCH" includes determining whether PDCCH is present by energy monitoring.

[0151] In one embodiment, the phrase "monitoring PDCCH" includes determining whether a PDCCH is present by coherent detection.

[0152] In one embodiment, the phrase "monitor PDCCH" includes determining whether a PDCCH exists by maximum likelihood detection.

[0153] In one embodiment, the phrase "monitoring PDCCH" includes determining whether a PDCCH is present by blind decoding detection.

[0154] In one embodiment, the phrase "monitor PDCCH" includes monitoring PDCCH within the Common Search Space (CSS).

[0155] In one embodiment, the phrase "monitor PDCCH" includes monitoring PDCCH within a UE-specific search space (USS).

[0156] In one embodiment, PDCCH is identified by a unicast RNTI.

[0157] In one embodiment, the unicast RNTI uniquely identifies the first node in the second cell.

[0158] In one embodiment, a PDCCH is identified by at least one of the following: C-RNTI, Cancellation Indication (CI)-RNTI, Configuration Scheduling (CS)-RNTI, Interrupt (INT)-RNTI, Slot Format Indication (SFI)-RNTI, Semi-Persistent (SP)-Channel State Information (CSI)-RNTI, Transmit Power Control (TPC)-Physical Uplink Control Channel (PUCCH)-RNTI, Transmit Power Control (TPC)-Physical Uplink Shared Channel (PUSCH)-RNTI, Transmit Power Control (TPC)-Sounding Reference Signal (SRS)-RNTI, and Available Indication (AI)-RNTI.

[0159] In one embodiment, PDCCH is identified by at least one of the following: Sidelink (SL)-RNTI, Sidelink Configuration Scheduling (SLCS)-RNTI, and SL Semi-Permanent Scheduling Vehicle-to-Vehicle / Vehicle-to-Infrastructure (V)-RNTI.

[0160] In one embodiment, the DRX active time depends on the first signaling.

[0161] In one embodiment, the DRX active time is related to the first signaling.

[0162] In one embodiment, the DRX active time depends on the time-domain resources occupied by the first signaling.

[0163] In one embodiment, the DRX active time depends on the type of first signaling, which includes MAC CE and DCI.

[0164] In one embodiment, the DRX active time depends on the content of the first signaling.

[0165] In one embodiment, the DRX active time depends on whether the first signaling indicates the timing advance value of the second cell.

[0166] In one embodiment, when the first signaling does not indicate a timing advance value for the second cell, the DRX active time depends on a random access procedure triggered by the first signaling and initiated by the first node in the second cell.

[0167] In one embodiment, when the first signaling indicates the timing advance value of the second cell, the DRX active time depends on the first signaling.

[0168] In one embodiment, the DRX active time depends on the feedback time of the first signaling.

[0169] In one embodiment, the DRX active time depends on the effective time of the first signaling.

[0170] In one embodiment, the start time of the DRX active time depends on the first signaling.

[0171] In one embodiment, the start time of the DRX active time is a Q symbol that is away from the time-domain resource occupied by the first signaling.

[0172] In one embodiment, the start time of the DRX active time is a Q symbol that is far from the end time of the time domain resource occupied by the first signaling.

[0173] In one embodiment, Q is a positive integer greater than 0.

[0174] In one embodiment, Q is 0.

[0175] In one embodiment, the DRX active time ends when the PDCCH is monitored.

[0176] Embodiment 2 Embodiment 2 illustrates a schematic diagram of a network architecture according to one embodiment of the present application, as shown in Figure 2. Figure 2 illustrates a diagram of a network architecture 200 for NR 5G, Long-Term Evolution (LTE), and Long-Term Evolution Advanced (LTE-A) systems. The NR 5G LTE or LTE-A network architecture 200 may be referred to as a 5G system (5GS) / Evolutionary Packet System (EPS) 200 or any other preferred term. The 5GS / EPS 200 may comprise one or more user equipment (UEs) 201, a next-generation radio access network (NG-RAN) 202, a 5G core network (5GC) / Evolutionary Packet Core (EPC) 210, a home subscriber server (HSS) / Unified Data Management (UDM) 220, and internet services 230. The 5GS / EPS may be interconnected with other access networks, but for simplicity, these entities / interfaces are not shown. As shown in the figure, 5GS / EPS provides packet-switched services, but those skilled in the art will readily understand that the various concepts presented throughout this application can be extended to networks or other cellular networks that provide circuit-switched services. The NG-RAN comprises an NR node B (gNB) 203 and another gNB 204. The gNB 203 provides protocol termination for the user plane and control plane to the UE 201. The gNB 203 provides an Xn interface (e.g., It may be connected to another gNB204 via backhaul. A gNB203 may also be referred to as a base station, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), transmit / receive point (TRP), or any other preferred term, and in a non-terrestrial network (NTN, non-terrestrial / satellite network) network, a gNB203 may be a satellite, aircraft, or a ground base station relayed via satellite. A gNB203 provides an access point to a 5GC / EPC210 for a UE201. Examples of UE201 include mobile phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, 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, mechanical communication devices, land vehicles, automobiles, in-vehicle devices, in-vehicle communication units, wearable devices, or any other device with similar functionality. Those skilled in the art may also refer to the UE201 as a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or any other preferred term. The gNB203 is connected to the 5GC / EPC210 via the S1 / NG interface. The 5GC / EPC210 comprises a Mobility Management Entity (MME) / Authentication Management Field (AMF) / Session Management Function (SMF)211, other MMEs / AMFs / SMF214, a Service Gateway (S-GW) / User Plane Function (UPF)212, and a Packet Data Network Gateway (P-GW) / UPF213. The MME / AMF / SMF211 is a control node that handles signaling between the UE201 and the 5GC / EPC210. Generally, the MME / AMF / SMF211 provides bearer and connection management.All user Internet Protocol (IP) packets are transmitted via S-GW / UPF212, which itself is connected to P-GW / UPF213. The P-GW provides UE IP address assignment and other functions. The P-GW / UPF213 is connected to Internet Service 230. Internet Service 230 includes the operator's corresponding Internet Protocol services, which may specifically include the Internet, intranet, IP Multimedia Subsystem (IMS), and Packet Switching (PS) Streaming services.

[0177] In one embodiment, UE201 corresponds to the first node in this application.

[0178] In one embodiment, NR node B203 corresponds to the second node in this application.

[0179] In one embodiment, NR node B203 corresponds to the third node in this application.

[0180] In one embodiment, another NR node B204 corresponds to the third node in this application.

[0181] In one embodiment, UE201 is a terminal that supports LTM.

[0182] In one embodiment, UE201 is a terminal that supports DRX.

[0183] In one embodiment, gNB203 is a Marcocell base station.

[0184] In one embodiment, the gNB203 is a microcell base station.

[0185] As one embodiment, gNB203 is a picocell base station.

[0186] In one embodiment, gNB203 is a femtocell.

[0187] In one embodiment, the gNB203 is a base station device that supports large latency differences.

[0188] In one embodiment, the gNB203 is a flying platform device.

[0189] In one embodiment, the gNB203 is a satellite device.

[0190] In one embodiment, the gNB203 is a test device (e.g., a transceiver that simulates some functions of a base station, and a signaling tester).

[0191] In one embodiment, gNB204 is a Marcocell base station.

[0192] In one embodiment, the gNB204 is a microcell base station.

[0193] In one embodiment, gNB204 is a picocell base station.

[0194] In one embodiment, gNB204 is a femtocell.

[0195] In one embodiment, the gNB204 is a base station device that supports large latency differences.

[0196] In one embodiment, the gNB204 is a flying platform device.

[0197] In one embodiment, the gNB204 is a satellite device.

[0198] In one embodiment, the gNB204 is a test device (e.g., a transceiver that simulates some functions of a base station, and a signaling tester).

[0199] In one embodiment, the wireless link from UE201 to gNB203 / gNB204 is an uplink, and the uplink is used to perform uplink transmission.

[0200] In one embodiment, the wireless link from gNB203 / gNB204 to UE201 is a downlink, and the downlink is used to perform downlink transmission.

[0201] In one embodiment, UE201 is connected to gNB203 / gNB204 via the Uu interface.

[0202] Embodiment 3 Embodiment 3 illustrates a schematic diagram of a wireless protocol architecture for a user plane and a control plane according to one embodiment of the present application, as shown in Figure 3. Figure 3 is a schematic diagram illustrating one embodiment of the wireless protocol architecture for a user plane 350 and a control plane 300. Figure 3 shows the wireless protocol architecture of the control plane 300 for the UE and gNB using three layers, namely Layer 1, Layer 2, and Layer 3. Layer 1 (L1) is the lowest layer and implements various PHY (Physical Layer) signal processing functions. L1 is referred to herein as PHY 301. Layer 2 (L2) 305 is above PHY 301 and connects the UE and gNB via PHY 301. L2 305 is responsible for the link to B. L2 305 includes the Medium Access Control (MAC) sublayer 302, the Radio Link Control (RLC) sublayer 303, and the Packet Data Convergence Protocol (PDCP) sublayer 304, which terminate at the network-side gNB. The PDCP sublayer 304 provides data encryption and integrity protection, and also provides inter-cell mobility support for UEs between gNBs. The RLC sublayer 303 provides data packet splitting and reconstruction and retransmits 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 channels 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) to cells between UEs. The MAC sublayer 302 is also responsible for Hybrid Automatic Retransmission Request (HARQ) operation. The Radio Resource Control (RRC) sublayer 306 in Layer 3 (L3) of the control plane 300 is responsible for acquiring radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the gNB and the UE. Although not shown, a V2X layer may also exist above the RRC sublayer 306 in the UE's control plane 300. The V2X layer is responsible for generating PC5 QoS parameter groups and QoS rules according to received service data or service requests, generating PC5 QoS streams corresponding to the PC5 QoS parameter groups, and transmitting the PC5 QoS stream identifiers and corresponding PC5 QoS parameter groups to the AS by the Access Layer (AS) layer for QoS processing of data packets belonging to the PC5 QoS stream identifiers. The V2X layer further includes a PC5-S signaling protocol (PC5-signaling protocol) sublayer, which is responsible for indicating to the AS layer whether each transmission is a PC5-S transmission or a V2X service data transmission.The radio protocol architecture of the user plane 350 comprises Layer 1 (L1) and Layer 2 (L2). The radio protocol architecture within the user plane 350 is substantially the same as the corresponding layers and sublayers in the control plane 300 for physical layer 351, PDCP sublayer 354 within L2 355, RLC sublayer 353 within L2 355, and MAC sublayer 352 within L2 355, although the PDCP sublayer 354 also provides header compression of upper-layer data packets to reduce the overhead of radio transmission. L2 355 within the user plane 350 further includes a Service Data Adaptive Protocol (SDAP) sublayer 356, which is responsible for mapping between Quality of Service (QoS) streams and Data Radio Bearers (DRBs) to support service diversity. The wireless protocol architecture of the UE within the user plane 350 may include some or all of the protocol sublayers at L2, including the SDAP sublayer 356, PDCP sublayer 354, RLC sublayer 353, and MAC sublayer 352. Although not shown in the diagram, the UE may have several higher layers above L2 355, including a network layer (e.g., IP layer) terminating at the network-side P-GW and an application layer terminating at the other end of the connection (e.g., a remote UE, server, etc.).

[0203] As one embodiment, the wireless protocol architecture shown in Figure 3 is applicable to the first node of this application.

[0204] As one embodiment, the wireless protocol architecture shown in Figure 3 is applicable to the second node of this application.

[0205] As one embodiment, the wireless protocol architecture shown in Figure 3 is applicable to the third node of this application.

[0206] In one embodiment, the first RRC signaling in this application is generated in RRC306.

[0207] In one embodiment, the first signaling in this application is generated in MAC302 or MAC352.

[0208] In one embodiment, the first signaling in this application is generated in PHY301 or PHY351.

[0209] In one embodiment, the second signaling in this application is generated in PHY301 or PHY351.

[0210] In one embodiment, the third signaling in this application is generated in PHY301 or PHY351.

[0211] In one embodiment, the second RRC signaling in this application is generated in RRC306.

[0212] In one embodiment, L2 305 or 355 belongs to a higher layer.

[0213] In one embodiment, the RRC sublayer 306 within L3 belongs to a higher layer.

[0214] Embodiment 4 Embodiment 4, as shown in Figure 4, illustrates a schematic diagram of a hardware module of a communication device according to one embodiment of the present application. Figure 4 is a block diagram of a first communication device 450 and a second communication device 410 that communicate with each other within an access network.

[0215] The first communication device 450 comprises a controller / processor 459, memory 460, data source 467, transmit processor 468, receive processor 456, multi-antenna transmit processor 457, multi-antenna receive processor 458, transmit / receive device 454, and antenna 452.

[0216] The second communication device 410 comprises a controller / processor 475, memory 476, data source 477, receiving processor 470, transmitting processor 416, multi-antenna receiving processor 472, multi-antenna transmitting processor 471, transmitting device / receiving device 418, and antenna 420.

[0217] In transmission from the second communication device 410 to the first communication device 450, the second communication device 410 provides the controller / processor 475 with upper-layer data packets from the core network or from data source 477. The core network and data source 477 represent all protocol layers above L2. The controller / processor 475 implements L2 functionality. In transmission from the second communication device 410 to the first communication device 450, the controller / processor 475 provides header compression, encryption, packet splitting and reordering, multiplexing between logical channels and transport channels, and allocation of radio resources to the first communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmitting lost packets and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 are responsible for: Various signal processing functions for L1 (i.e., the physical layer) are implemented. The transmit processor 416 implements coding and interleaving to facilitate forward error correction (FEC) in the second communication device 410, as well as mapping of signal constellations based on various modulation schemes (e.g., two-phase-shifted modulation (BPSK), four-phase-shifted modulation (QPSK), M-ary-phase-shifted modulation (M-PSK), and M-ary-quadrature-amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 generates one or more spatial streams by performing digital spatial precoding (including codebook-based and non-codebook-based precoding) and beamforming processing on the encoded and modulated symbols. The transmit processor 416 then maps each spatial stream to subcarriers, multiplexes the spatial streams 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 that carries the time-domain multicarrier symbol stream. Next, the multi-antenna transmit processor 471 performs transmit analog precoding / beamforming operations on the time-domain multi-carrier symbol stream. Each transmit device 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream, which is then provided to different antennas 420.

[0218] In transmission from the second communication device 410 to the first communication device 450, each receiving device 454 in the first communication device 450 receives the signal via its corresponding antenna 452. Each receiving device 454 reconstructs the information modulated on the radio frequency carrier and converts the radio frequency stream into a baseband multicarrier symbol stream for provision to the receiving processor 456. The receiving processor 456 and the multi-antenna receiving processor 458 implement various signal processing functions of L1. The multi-antenna receiving processor 458 performs a receive analog precoding / beamforming operation on the baseband multicarrier symbol stream from the receiving device 454. The receiving processor 456 uses a Fast Fourier Transform (FFT) to convert the baseband multicarrier symbol stream from the time domain to the frequency domain after the receive analog precoding / beamforming operation. In the frequency domain, the physical layer data signal and reference signal are demultiplexed by the receiving processor 456. The reference signal is used for channel estimation, and the data signal undergoes multi-antenna detection in the multi-antenna receiving processor 458 to reconstruct an arbitrary spatial stream destined for the first communication device 450. Symbols on each spatial stream are demodulated and reconstructed in the receiving processor 456 to generate a soft decision. The receiving processor 456 then decodes and deinterleaves the soft decision 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, which implements L2 functionality. The controller / processor 459 may be associated with memory 460, which stores program code and data. Memory 460 may be referred to as computer-readable media. During transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 recovers the upper-layer data packets from the second communication device 410 by providing demultiplexing between the transport channel and the logical channel, packet reconstruction, decryption, header decompression, and control signal processing.Next, the upper-layer data packets are provided to all protocol layers above L2. Various control signals may also be provided to L3 for L3 processing.

[0219] In transmission from the first communication device 450 to the second communication device 410, the first communication device 450 uses data source 467 to provide upper-layer data packets to the controller / processor 459. Data source 467 represents all protocol layers above L2. Similar to the transmission functions in the second communication device 410 described in the transmission to 50, the controller / processor 459 implements header compression, encryption, packet splitting and reordering, as well as multiplexing between logical and transport channels, and implements L2 functions for the user plane and control plane. The controller / processor 459 is also responsible for retransmitting 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 and non-codebook-based precoding), as well as beamforming processing. The transmit processor 468 then modulates the generated spatial stream into a multi-carrier / single-carrier symbol stream, which is provided to different antennas 452 via the transmit device 454 after analog precoding / beamforming operations in the multi-antenna transmit processor 457. Each transmitting device 454 first converts the baseband symbol stream provided by the multi-antenna transmitting processor 457 into a radio frequency symbol stream, and then provides the radio frequency symbol stream to the antenna 452.

[0220] In transmission from the first communication device 450 to the second communication device 410, the functions of the second communication device 410 are the same as the receiving functions of the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiving device 418 receives a radio frequency signal via its corresponding antenna 420, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to the multi-antenna receiving processor 472 and the receiving processor 470. The receiving processor 470 and the multi-antenna receiving processor 472 jointly implement L1 functions. The controller / processor 475 implements L2 functions. The controller / processor 475 may be associated with a memory 476 that stores program code and data. The memory 476 may be referred to as a computer-readable medium. In transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides demultiplexing between the transport channel and logical channel, packet reconstruction, decryption, header decompression, and control signal processing to reconstruct 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 L2, and various control signals may also be provided to the core network or L3 for L3 processing.

[0221] In one embodiment, the first communication device 450 includes at least one processor and at least one memory, the at least one memory containing computer program code, the at least one memory and the computer program code are configured to be used together with at least one processor, the first communication device 450 receives at least a first RRC signaling which indicates DRX active time, the DRX active time is applied to at least a second cell, and receives a first signaling which indicates switching to the second cell, and monitors the PDCCH in the second cell during DRX active time, the DRX active time depends on the first signaling which is a lower layer signaling.

[0222] In one embodiment, the first communication device 450 includes a memory for storing a computer-readable instruction program, the computer-readable instruction program, when executed by at least one processor, generates an action, the action being a first RRC signaling indicating a DRX active time, the DRX active time being applied to at least a second cell, the first RRC signaling being received, and the first signaling being received in the first cell, indicating a switch to the second cell. This includes monitoring the PDCCH in the second cell during the DRX active time, where the DRX active time depends on the first signaling, and the first signaling is a lower-layer signaling.

[0223] In one embodiment, the second communication device 410 comprises at least one processor and at least one memory, the at least one memory containing computer program code, and the at least one memory and computer program code are configured to be used together with the at least one processor. The second communication device 410 transmits at least a first RRC signaling which indicates DRX active time, the DRX active time is applied to at least a second cell, and transmits a first signaling which indicates switching to the second cell, the PDCCH is monitored in the second cell during DRX active time, the DRX active time depends on the first signaling which is a lower layer signaling.

[0224] In one embodiment, the second communication device 410 includes a memory for storing a computer-readable instruction program, which, when executed by at least one processor, generates an action, the action including transmitting a first RRC signaling indicating a DRX active time, the DRX active time being applied to at least a second cell, and transmitting a first signaling in the first cell indicating a switch to the second cell, the PDCCH being monitored in the second cell during the DRX active time, the DRX active time depending on the first signaling, the first signaling being a lower-layer signaling.

[0225] In one embodiment, the second communication device 410 comprises at least one processor and at least one memory, the at least one memory containing computer program code, and the at least one memory and the computer program code are configured to be used together with the at least one processor. The second communication device 410 receives the first random access preamble in the second cell, which is at least a first random access preamble used to determine the timing advance value of the second cell, a first RRC signaling indicating the DRX active time, which is applied to at least the second cell, a first signaling indicating a switch to the second cell, a first signaling received in the first cell, a PDCCH monitored in the second cell during the DRX active time, the DRX active time depends on the first signaling, the first signaling is a lower layer signaling, a third signaling is received before the first signaling is received, and the third signaling is used to trigger the transmission of the first random access preamble.

[0226] In one embodiment, the second communication device 410 includes a memory for storing a computer-readable instruction program, which, when executed by at least one processor, generates an action, the action includes receiving a first random access preamble in the second cell, which is used to determine the timing advance value of the second cell, a first RRC signaling indicating the DRX active time, the DRX active time being applied to at least the second cell, a first signaling indicating a switch to the second cell, the first signaling being received in the first cell, the PDCCH being monitored in the second cell during the DRX active time, the DRX active time depending on the first signaling, and the first signaling being a lower layer signal The third signaling ring is received before the first signaling ring is received, and the third signaling ring is used to trigger the transmission of the first random access preamble.

[0227] In one embodiment, the first communication device 450 corresponds to the first node in this application, and the second communication device 410 corresponds to the second node in this application.

[0228] In one embodiment, the first communication device 450 corresponds to the first node in this application, and the second communication device 410 corresponds to the third node in this application.

[0229] In one embodiment, the first communication device 450 is a UE.

[0230] In one embodiment, the first communication device 450 is a relay.

[0231] In one embodiment, the second communication device 410 is a base station device.

[0232] In one embodiment, the second communication device 410 is a distributed unit of a base station.

[0233] In one embodiment, at least one of the following is used to transmit the first RRC signaling in this application: antenna 420, transmitting device 418, multi-antenna transmitting processor 471, transmitting processor 416, or controller / processor 475.

[0234] In one embodiment, at least one of the following is used to receive the first RRC signaling: an antenna 452, a receiving device 454, a multi-antenna receiving processor 458, a receiving processor 456, or a controller / processor 459.

[0235] In one embodiment, at least one of the following is used to transmit the first signaling in this application: antenna 420, transmitting device 418, multi-antenna transmitting processor 471, transmitting processor 416, or controller / processor 475.

[0236] In one embodiment, at least one of the following is used to receive the first signaling in this application: an antenna 452, a receiving device 454, a multi-antenna receiving processor 458, a receiving processor 456, or a controller / processor 459.

[0237] In one embodiment, at least one of the following is used to transmit a second signal in this application: an antenna 452, a transmitting device 454, a multi-antenna transmitting processor 457, a transmitting processor 468, or a controller / processor 459.

[0238] In one embodiment, at least one of the following is used to receive a second signaling: an antenna 420, a receiving device 418, a multi-antenna receiving processor 472, a receiving processor 470, or a controller / processor 475.

[0239] In one embodiment, at least one of the following is used to transmit a third signaling: an antenna 420, a transmitting device 418, a multi-antenna transmitting processor 471, a transmitting processor 416, or a controller / processor 475.

[0240] In one embodiment, a small number of the following are included: antenna 452, receiving device 454, multi-antenna receiving processor 458, receiving processor 456, or controller / processor 459. At least one of these is used to receive the third signaling in this application.

[0241] In one embodiment, at least one of the following is used to transmit a second RRC signal in this application: an antenna 452, a transmitting device 454, a multi-antenna transmitting processor 457, a transmitting processor 468, or a controller / processor 459.

[0242] In one embodiment, at least one of the following is used to receive a second RRC signaling: an antenna 420, a receiving device 418, a multi-antenna receiving processor 472, a receiving processor 470, or a controller / processor 475.

[0243] Embodiment 5 Embodiment 5 illustrates a flowchart of wireless signal transmission according to one embodiment of the present application, as shown in Figure 5. In Figure 5, the first node N51 and the second node N52 communicate via a wireless interface, and the first node N51 and the third node N53 communicate via a wireless interface. It should be noted that the order in this example does not limit the signal transmission order and implementation order in the present application.

[0244] For the first node N51, the first RRC signaling is received in step S511, the third signaling is received in step S512, the first random access preamble is transmitted in step S513, the first signaling is received in step S514, the second signaling is transmitted in step S515, PDCCH is received in step S516, and the second RRC signaling is transmitted in step S517.

[0245] For the second node N52, the first RRC signaling is transmitted in step S521, the third signaling is transmitted in step S522, the first signaling is transmitted in step S523, and the second signaling is received in step S524.

[0246] For the third node N53, the first random access preamble is received in step S531, PDCCH is transmitted in step S532, and the second RRC signaling is received in step S533.

[0247] In Embodiment 5, a first RRC signaling is received, which indicates a DRX active time, and the DRX active time is applied to at least a second cell, and a first signaling is received in the first cell, which indicates a switch to a second cell, and the PDCCH is monitored in the second cell during the DRX active time, and the DRX active time depends on the first signaling, which is a lower layer signaling, and a second signaling is transmitted in the first cell, which indicates that the first signaling was successfully received, and the second A second RRC signaling is transmitted in the second cell, indicating that RRC reconstruction is complete, and a PDCCH is monitored, indicating the time-frequency resources occupied by the second RRC signaling, and a first signaling indicates the timing advance value of the second cell, and the first signaling does not trigger the transmission of a random access preamble in the second cell, and a third signaling is received before the first signaling is received, and in response to the receipt of the third signaling, the first random access preamble determines the timing advance value of the second cell. A first random access preamble, used for determination, is sent in the second cell.

[0248] In Embodiment 5, transmission between the first node N51 and the second node N52 passes through at least the first cell, and transmission between the first node N51 and the third node N53 is carried out via the second cell.

[0249] In one embodiment, the second node N52 and the third node N53 are located in the same place.

[0250] In one embodiment, the second node N52 and the third node N53 are the same node.

[0251] In one embodiment, the second node N52 and the third node N53 are the same gNB-DU.

[0252] In one embodiment, the second node N52 and the third node N53 are the same transmit / receive point (TRP).

[0253] In one embodiment, the second node N52 and the third node N53 are different nodes.

[0254] In one embodiment, the second node N52 and the third node N53 are different gNB-DUs.

[0255] In one embodiment, the second node N52 and the third node N53 are different gNB-CUs.

[0256] In one embodiment, the second node N52 is the base station of the first cell.

[0257] In one embodiment, the second node N52 is the TRP of the first cell.

[0258] In one embodiment, the third node N53 is the base station of the second cell.

[0259] In one embodiment, the third node N53 is the TRP of the second cell.

[0260] In one embodiment, the second node N52 is the base station for the serving cell of the first node N51 before cell switching.

[0261] In one embodiment, the third node N53 is the base station for the serving cell of the first node N51 after cell switching.

[0262] As an embodiment, before cell switching, the second node N52 is the serving base station of the special cell of the first node, the third node N53 is the serving base station of the secondary cell (SCell) of the first node, after cell switching, the second node N52 is the serving base station of the secondary cell of the first node, and the third node N53 is the serving base station of the special cell of the first node.

[0263] As an embodiment, before cell switching, the first cell is the special cell of the first node N51, the second cell is the secondary cell of the first node N51, after cell switching , the first cell is the secondary cell of the first node N51, and the second cell is the special cell of the first node N51. [[ID=^]]

[0264] As an embodiment, the third signaling is received before the first signaling is received.

[0265] As an embodiment, the third signaling is received in the serving cell of the first node.

[0266] As an embodiment, the third signaling is received in the first cell.

[0267] As an embodiment, the third signaling is signaling of a protocol layer below the RRC sublayer.

[0268] As an embodiment, the third signaling is physical layer signaling. [[ID=^]]

[0269] As an embodiment, the third signaling is DCI.

[0270] As an embodiment, the third signaling is in the order of the physical downlink control channel (PDCCH).

[0271] As an embodiment, the third signaling is an enhanced PDCCH order. Note: There seems to be an error in the provided text where line ID 8 is repeated as line ID 16. I've translated it as provided but this might need to be corrected in the original source. Also, line ID 28 seems to be a duplicate of line ID 16 in the original, which has been repeated in the translation as well.

[0272] In one embodiment, the third signaling indicates the second cell.

[0273] In one embodiment, the third signaling includes one cell identity, which is used to identify a second cell.

[0274] In one embodiment, a first random access (RA) preamble is transmitted in the second cell in response to the receipt of a third signaling signal.

[0275] In one embodiment, the third signaling indicates the first random access preamble.

[0276] In one embodiment, the third signaling indicates an air interface resource for transmitting the first random access preamble in the second cell.

[0277] In one embodiment, the third signaling indicates a Random Access Channel (RACH) opportunity to transmit the first Random Access Preamble in the second cell.

[0278] In one embodiment, the third signaling indicates a synchronization signal (SS) / physical broadcast channel (PBCH) index used to determine the RACH opportunity of the second cell.

[0279] In one embodiment, the third signaling represents an uplink carrier used to transmit a physical random access channel (PRACH) in the second cell, the uplink carrier including a normal uplink (NUL) and an auxiliary uplink (SUL).

[0280] In one embodiment, a third signaling indicates that the first random access preamble is contention-free.

[0281] As one embodiment, the first random access preamble is a characteristic sequence.

[0282] As one embodiment, the first random access preamble is a Gold sequence.

[0283] As one embodiment, the first random access preamble is an M sequence.

[0284] As one embodiment, the first random access preamble is a Zadoff-Chu (ZC) sequence.

[0285] As one embodiment, the first node is configured or indicated to have no corresponding random access response (RAR) for the first random access preamble.

[0286] As one embodiment, the first node is configured or indicated such that a random access response window is not opened after the first random access preamble is transmitted.

[0287] As one embodiment, the first random access preamble does not belong to the random access procedure.

[0288] As one embodiment, the first random access preamble is used to determine the timing advance value of the second cell.

[0289] As one embodiment, the first signaling indicates the timing advance value of the second cell.

[0290] As one embodiment, the first signaling indicates at least the timing advance value of the second cell.

[0291] As one embodiment, the timing advance value is for a plurality of cells, and the plurality of cells includes the second cell.

[0292] In one embodiment, multiple cells belong to the same Timing Advance Group (TAG).

[0293] In one embodiment, the timing advance value is applied to the cells included in the TAG.

[0294] In one embodiment, the first signaling implicitly indicates the timing advance value of the second cell.

[0295] In one embodiment, the first signaling indicates that the timing advance value of the second cell is the same as the timing advance value of the source cell.

[0296] As a sub-embodiment of the above embodiment, the source cell is the first cell.

[0297] As a sub-embodiment of the above embodiment, the source cell is the serving cell of the first node.

[0298] In one embodiment, the first signaling is performed based on the timing advance value of the second cell. This indicates that the timing advance value is the same as that of the cells included in the Secondary Timing Advance Group (STAG).

[0299] In one embodiment, the first signaling indicates that the timing advance value of the second cell is the same as the timing advance value of the cells included in the primary timing advance group (PTAG).

[0300] In one embodiment, the first signaling explicitly indicates the timing advance value of the second cell.

[0301] In one embodiment, the first signaling includes the timing advance value of the second cell.

[0302] In one embodiment, the first signaling includes a timing advance (TA) field, the TA field indicating the timing advance value of the second cell.

[0303] In one embodiment, the timing advance value is 0.

[0304] In one embodiment, the timing advance value is not 0.

[0305] In one embodiment, the first cell and the second cell belong to different TAGs.

[0306] In one embodiment, the first cell and the second cell belong to the same TAG.

[0307] In one embodiment, the timing advance value of the second cell, indicated by the first signaling, is used to maintain uplink time alignment with the second cell.

[0308] In one embodiment, after the timing advance value of the second cell is received and applied, the first node is considered to be in uplink time alignment with the second cell.

[0309] In one embodiment, a second signaling is transmitted in the first cell, and the second signaling indicates that the first signaling has been successfully received.

[0310] In one embodiment, the second signaling is physical layer signaling.

[0311] In one embodiment, the second signaling is a hybrid automatic retransmission request (HARQ)-acknowledgment (ACK) feedback.

[0312] In one embodiment, the second signaling is ACK.

[0313] In one embodiment, the second signaling is feedback for correctly receiving a transport block (TB), and the transport block includes the first signaling.

[0314] In one embodiment, the second signaling is feedback for correctly receiving one MAC protocol data unit (PDU), the one MAC PDU includes at least one MAC subprotocol data unit (sub-PDU), and at least one MAC sub-PDU includes the first signaling.

[0315] In one embodiment, after the transmission of the second signaling signal is completed, the first node is disconnected from the first cell.

[0316] In one embodiment, disconnecting from the first cell includes stopping PDCCH monitoring in the first cell.

[0317] In one embodiment, disconnection from the first cell includes stopping the transmission of an uplink channel or uplink signal in the first cell, where the uplink channel includes PUCCH and PUSCH, and the uplink signal includes a sounding reference signal (SRS).

[0318] In one embodiment, disconnection from the first cell includes cessation of the application of the RRC configuration of the first cell.

[0319] In one embodiment, the first signaling does not trigger the transmission of a random access preamble in the second cell during cell switching.

[0320] In one embodiment, the first signaling does not trigger the initiation of a random access procedure in the second cell during cell switching.

[0321] In one embodiment, the first node monitors the PDCCH in the second cell during the DRX active time.

[0322] In one embodiment, the PDCCH is monitored in a second cell.

[0323] In one embodiment, PDCCH indicates a new transmission.

[0324] In one embodiment, the PDCCH schedules downlink transmissions.

[0325] In one embodiment, the PDCCH schedules the reception of the Physical Downlink Shared Channel (PDSCH).

[0326] In one embodiment, the PDCCH schedules uplink transmissions.

[0327] In one embodiment, PDCCH schedules a PUSCH transmission.

[0328] In one embodiment, PDCCH indicates a time-frequency resource occupied by a second RRC signaling, and the second RRC signaling indicates that RRC reconstruction is complete.

[0329] In one embodiment, PDCCH indicates that the cell switchover was successful.

[0330] In one embodiment, when PDCCH is received, the first node determines that the cell switchover was successful.

[0331] In one embodiment, PDCCH represents the time-frequency resources used for new transmissions.

[0332] In one embodiment, when a new data indication (NDI) included in a PDCCH is toggled by comparing it with an NDI included in the most recently received DCI signaling by the first node before receiving the PDCCH, a new transmission is indicated and included in the PDCCH The Hybrid Auto-Retransmission Request (HARQ) process ID is the same as the HARQ process ID included in the most recently received DCI signaling before receiving the PDCCH.

[0333] As a sub-embodiment of the above embodiment, it is shown that the NDI included in the most recently received DCI signaling before receiving PDCCH is 0, the NDI included in PDCCH is 1, and the NDI included in PDCCH is toggled.

[0334] As a sub-embodiment of the above embodiment, it is shown that the NDI included in the most recently received DCI signaling before receiving PDCCH is 1, the NDI included in PDCCH is 0, and the NDI included in PDCCH is toggled.

[0335] In one embodiment, when PDCCH indicates that semi-persistent scheduling (SPS) is active, PDCCH is used to schedule new transmissions.

[0336] In one embodiment, when the PDCCH indicates that multicast SPS is active, the PDCCH is used to schedule new transmissions.

[0337] In one embodiment, when the PDCCH indicates that a configured grant type 2 is active, the PDCCH is used to schedule a new transmission.

[0338] In one embodiment, when the PDCCH indicates that a configured sidelink grant of configured grant type 2 is active, the PDCCH is used to schedule a new transmission.

[0339] In one embodiment, the first transmission for a transport block (TB) is a new transmission.

[0340] In one embodiment, a transmission for one transport block (TB) without a previous NDI is a new transmission.

[0341] In one embodiment, the second RRC signaling is transmitted in the second cell.

[0342] In one embodiment, the second RRC signaling is transmitted on a time-frequency resource indicated by the PDCCH.

[0343] In one embodiment, the second RRC signaling is RRCReconfigurationComplete.

[0344] In one embodiment, a second RRC signaling is used in response to a first RRC signaling.

[0345] In one embodiment, the second RRC signaling indicates that the cell switchover was successful.

[0346] In one embodiment, when a second RRC signaling is received, the third node N53 determines that the cell switchover was successful.

[0347] In one embodiment, the PDCCH is a first PDCCH received in a second cell.

[0348] In one embodiment, the second RRC signaling is included in the first uplink MAC PDU scheduled by the PDCCH.

[0349] In one embodiment, a first transmitter transmits a second RRC signaling in a second cell, the second RRC signaling indicating that RRC reconfiguration is complete, and the first RRC signaling constitutes an air interface resource for transmitting the second RRC signaling.

[0350] As a sub-embodiment of the above embodiment, the air interface resource occupied by the second RRC signaling is a configured grant (CG).

[0351] Embodiment 6 Embodiment 6, as shown in Figure 6, illustrates a flowchart of signal transmission in a backhaul network according to one embodiment of the present application. In Figure 6, the second node N62 and the third node N63 communicate via the backhaul network.

[0352] For the second node N62, the first message is received in step S621, and the second message is sent in step S622.

[0353] For the third node N63, the first message is sent in step S631 and the second message is received in step S632.

[0354] Embodiment 6 illustrates a scenario in which the second node N62 and the third node N63 are connected via a backhaul network. Embodiment 6 does not exclude scenarios in which the second node N62 and the third node N63 are connected via other interfaces, the other interfaces including, but not limited to, internal interfaces.

[0355] In one embodiment, the second node N62 is a serving base station for the first cell, and the third node N63 is a serving base station for the second cell.

[0356] In one embodiment, the second node N62 is the gNB-DU of the source cell for cell switching, and the third node N63 is the gNB-DU of the target cell for cell switching, where the target cell is the second cell and the source cell includes the first cell.

[0357] In one embodiment, the second node N62 and the third node N63 may be directly connected or interconnected via a gNB-CU.

[0358] In one embodiment, the third node N63 transmits the configuration of the second cell to the second node N62, and the second node N62 transmits at least a portion of the configuration of the second cell to the first node via the first RRC signaling.

[0359] In one embodiment, the configuration of the second cell includes monitoring the USS of the PDCCH.

[0360] In one embodiment, the configuration of the second cell includes monitoring the CSS of the PDCCH.

[0361] In one embodiment, the configuration of the second cell includes a first random access preamble.

[0362] In one embodiment, the configuration of the second cell includes an air interface resource for transmitting the first random access preamble in the second cell.

[0363] In one embodiment, a third signaling triggers the transmission of a first random access preamble in the second cell, the first random access preamble is used by the third node N63 to determine the timing advance value of the second cell, the third node N63 sends a first message to the second node N62, the first message includes the timing advance value of the second cell, and the second node N62 indicates the timing advance value of the second cell via the first signaling, thereby enabling the first node to achieve uplink time alignment with the second cell.

[0364] In one embodiment, the second node N62 transmits a first signaling to indicate cell switching, and after transmitting the first signaling, the second node N62 transmits a second message to the third node N63.

[0365] In one embodiment, the second message indicates that the cell is being switched to the second cell.

[0366] In one embodiment, the second message indicates that an uplink or downlink transmission can be performed through the second cell.

[0367] In one embodiment, the second message indicates that the second cell transmits PDCCH.

[0368] In one embodiment, the second message indicates the beam selected for the second cell.

[0369] In one embodiment, the second message indicates that PDCCH is to be transmitted to the second cell through the selected beam.

[0370] In one embodiment, the second message indicates that a second RRC signaling is received for the second cell through a selected beam.

[0371] In one embodiment, both the first and second messages are backhaul network interface messages, and the second node N62 and the third node N63 are connected via the backhaul network.

[0372] In one embodiment, both the first and second messages are internal messages, and the second node N62 and the third node N63 are connected via an internal interface.

[0373] Embodiment 7 Embodiment 7, as shown in Figure 7, illustrates a schematic diagram of the DRX active time according to one embodiment of the present application.

[0374] In one embodiment, the DRX active time begins when a first signaling is received.

[0375] In one embodiment, the received first signaling includes the end of the time-domain resource occupied by the first signaling.

[0376] In one embodiment, the first signaling received is occupied by the first signaling. The time domain resources possessed include the end point of the symbol to which they are located.

[0377] In one embodiment, the received first signaling includes the end of the slot in which the time-domain resource occupied by the first signaling is located.

[0378] In one embodiment, the received first signaling includes the end of the subframe in which the time-domain resource occupied by the first signaling is located.

[0379] In one embodiment, the DRX active time begins with the first symbol after the first signaling is received.

[0380] In one embodiment, the DRX active time starts from the first slot after the first signaling is received.

[0381] In one embodiment, the DRX active time begins from the first subframe after the first signaling is received.

[0382] In one embodiment, the DRX active time begins with a first downlink symbol after the first signaling is received.

[0383] In one embodiment, the DRX active time ends when PDCCH is received.

[0384] In one embodiment, the DRX active time is the time from when the first signaling is received until when the PDCCH is received.

[0385] In one embodiment, the DRX active time is the time from the first downlink symbol after the first signaling is received until the PDCCH is received.

[0386] Embodiment 7 illustrates that the DRX active time is the time from when the first signaling is received until when the PDCCH is received.

[0387] Embodiment 8 Embodiment 8, as shown in Figure 8, illustrates a schematic diagram of the DRX active time according to one embodiment of the present application.

[0388] In one embodiment, the DRX active time begins when the transmission of the second signaling signal is completed.

[0389] In one embodiment, the DRX active time begins with the first symbol after the transmission of the second signaling signal is complete.

[0390] In one embodiment, the DRX active time starts from the first slot after the transmission of the second signaling signal is completed.

[0391] In one embodiment, the DRX active time starts from the first subframe after the transmission of the second signaling signal is completed.

[0392] In one embodiment, the DRX active time begins with the first downlink symbol after the transmission of the second signaling signal is completed.

[0393] In one embodiment, the DRX active time is the time from when the transmission of the second signaling is completed until when the PDCCH is received.

[0394] In one embodiment, the DRX active time is the time from the first downlink symbol after the second signaling transmission is completed until the PDCCH is received.

[0395] In one embodiment, the transmission time of the second signaling depends on the first signaling.

[0396] In one embodiment, the transmission time of the second signaling is indicated by the PDCCH that schedules the first signaling.

[0397] In one embodiment, the interval between the transmission time of the second signaling and the reception time of the first signaling is indicated by the PDCCH that schedules the first signaling.

[0398] Embodiment 8 illustrates that the DRX active time is the time from when the transmission of the second signaling is completed until when the PDCCH is received.

[0399] Embodiment 9 Embodiment 9, as shown in Figure 9, illustrates a schematic diagram of the DRX active time according to one embodiment of the present application.

[0400] In one embodiment, the first signaling indicates that the configuration of the second cell is applied.

[0401] In one embodiment, the first signaling implicitly indicates that the configuration of the second cell is applied.

[0402] In one embodiment, the configuration of the second cell to be applied includes a configuration of the second cell that replaces the current configuration of the first node.

[0403] In one embodiment, the second cell configuration to be applied includes performing RRC reconstruction using the second cell configuration.

[0404] In one embodiment, the configuration of the second cell to be applied includes performing RRC reconfiguration using the configuration of the second cell and not performing a Layer 2 (L2) reset.

[0405] In one embodiment, the time for which the configuration of the second cell is applied is autonomously determined by the UE.

[0406] In one embodiment, the time for which the configuration of the second cell is applied is determined autonomously according to the function of the UE.

[0407] In one embodiment, the time interval between the time when the configuration of the second cell is applied and the time when the first signaling is received is less than or equal to the Q1 symbol, where Q1 is a non-negative integer.

[0408] In one embodiment, the DRX active time begins when the configuration of the second cell is applied.

[0409] In one embodiment, the DRX active time is the time from when the configuration of the second cell is applied until when the PDCCH is received.

[0410] Embodiment 9 illustrates that the DRX active time is the time from when the configuration of the second cell is applied until when the PDCCH is received.

[0411] Embodiment 10 Embodiment 11 illustrates a structural block diagram of a processing unit at a first node according to one embodiment of the present application, as shown in Figure 10. In Figure 10, the first node processing unit 1000 comprises a first receiver 1001 and a first transmitter 1002, and the first node 1000 is a UE.

[0412] In Embodiment 10, the first receiver 1001 receives a first RRC signaling which indicates the DRX active time, and the DRX active time is applied to at least the second cell, and receives a first signaling which indicates switching to the second cell, and monitors the PDCCH in the second cell during the DRX active time, the DRX active time depends on the first signaling which is a lower layer signaling.

[0413] In one embodiment, the DRX active time dependent on the first signaling includes a DRX active time that begins when the first signaling is received.

[0414] In one embodiment, the first transmitter 1002 transmits a second signaling in the first cell, which indicates that the first signaling has been successfully received, and the DRX active time dependent on the first signaling includes a DRX active time that begins when the transmission of the second signaling is complete.

[0415] In one embodiment, the DRX active time dependent on the first signaling includes a DRX active time that begins when the configuration of the second cell is applied, and the first signaling indicates that the configuration of the second cell is applied.

[0416] In one embodiment, the first transmitter 1002 transmits a second RRC signaling in the second cell, which is a second RRC signaling indicating that RRC reconstruction is complete, and the PDCCH is monitored, which indicates the time-frequency resources occupied by the second RRC signaling.

[0417] In one embodiment, the first signaling indicates the timing advance value of the second cell, and the first signaling does not trigger the transmission of a random access preamble in the second cell.

[0418] In one embodiment, a first signaling indicates the timing advance value of a second cell, a first receiver 1001 receives a third signaling before receiving the first signaling, and a first transmitter 1002, in response to receiving the third signaling, transmits a first random access preamble in the second cell, which is used to determine the timing advance value of the second cell.

[0419] In one embodiment, the first receiver 1001 comprises a receiving device 454 (including an antenna 452), a receiving processor 456, a multi-antenna receiving processor 458, and a controller / processor 459 as shown in Figure 4 of this application.

[0420] In one embodiment, the first receiver 1001 comprises at least one of the receiving device 454 (including antenna 452), receiving processor 456, multi-antenna receiving processor 458, or controller / processor 459 as shown in Figure 4 of this application.

[0421] In one embodiment, the first transmitter 1002 comprises a transmitting device 454 (including an antenna 452), a transmitting processor 468, a multi-antenna transmitting processor 457, and a controller / processor 459 as shown in Figure 4 of this application.

[0422] In one embodiment, the first transmitter 1002 comprises at least one of the following: a transmitting device 454 (including an antenna 452), a transmitting processor 468, a multi-antenna transmitting processor 457, or a controller / processor 459 as shown in Figure 4 of this application.

[0423] Embodiment 11 Embodiment 11 illustrates a structural block diagram of a processing unit in a second node device according to one embodiment of the present application, as shown in Figure 11. In Figure 11, the second node processing unit 1100 comprises a second receiver 1101 and a second transmitter 1102, and the second node 1100 is a base station or gNB-DU.

[0424] In Embodiment 11, the second transmitter transmits a first RRC signaling which indicates DRX active time, the DRX active time is applied to at least the second cell, and transmits a first signaling which indicates switching to the second cell in the first cell, the PDCCH is monitored in the second cell during DRX active time, the DRX active time depends on the first signaling which is a lower layer signaling.

[0425] In one embodiment, the DRX active time dependent on the first signaling includes a DRX active time that begins when the first signaling is received.

[0426] In one embodiment, the second receiver 1101 receives a second signaling in the first cell, which is a second signaling indicating that the first signaling has been successfully received, and the DRX active time dependent on the first signaling includes a DRX active time that begins when the transmission of the second signaling is complete.

[0427] In one embodiment, the DRX active time dependent on the first signaling includes a DRX active time that begins when the configuration of the second cell is applied, and the first signaling indicates that the configuration of the second cell is applied.

[0428] In one embodiment, the first signaling indicates the timing advance value of the second cell, and the first signaling does not trigger the transmission of a random access preamble in the second cell.

[0429] In one embodiment, a first signaling indicates the timing advance value of a second cell, a second transmitter 1102 transmits a third signaling before transmitting the first signaling, the third signaling is used to trigger the transmission of a first random access preamble in the second cell, and the first random access preamble is used to determine the timing advance value of the second cell.

[0430] In one embodiment, the first signaling indicates the timing advance value of the second cell. The second receiver 1101 receives the first message, which indicates the timing advance value of the second cell.

[0431] In one embodiment, the second transmitter 1102 transmits a second message, which indicates a switch to the second cell.

[0432] In one embodiment, the second receiver 1101 comprises a receiving device 418 (including an antenna 420), a receiving processor 470, a multi-antenna receiving processor 472, and a controller / processor 475 as shown in Figure 4 of this application.

[0433] In one embodiment, the second receiver 1101 comprises at least one of the receiving device 418 (including antenna 420), receiving processor 470, multi-antenna receiving processor 472, and controller / processor 475 shown in Figure 4 of this application.

[0434] In one embodiment, the second transmitter 1102 comprises a transmitting device 418 (including an antenna 420), a transmitting processor 416, a multi-antenna transmitting processor 471, and a controller / processor 475 as shown in Figure 4 of this application.

[0435] In one embodiment, the second transmitter 1102 comprises at least one of the following: the transmitting device 418 (including the antenna 420), the transmitting processor 416, the multi-antenna transmitting processor 471, or the controller / processor 475 shown in Figure 4 of this application.

[0436] Embodiment 12 Embodiment 12 illustrates a structural block diagram of a processing unit at a third node according to one embodiment of the present application, as shown in Figure 12. In Figure 12, the third node processing unit 1200 comprises a third receiver 1201 and a third transmitter 1202, and the third node 1200 is a base station or gNB-DU.

[0437] In Embodiment 12, the third receiver 1201 receives the first random access preamble in the second cell, which is a first random access preamble used to determine the timing advance value of the second cell, and the first RRC signaling is received, which indicates the DRX active time, which is applied to at least the second cell, and the first signaling is received in the first cell, which is a first signaling indicating a switch to the second cell, and the PDCCH is monitored in the second cell during the DRX active time, which depends on the first signaling, which is a lower layer signaling, and the third signaling is received before the first signaling is received, and the third signaling is used to trigger the transmission of the first random access preamble.

[0438] In one embodiment, the DRX active time dependent on the first signaling includes a DRX active time that begins when the first signaling is received.

[0439] In one embodiment, the DRX active time dependent on the first signaling includes a DRX active time that begins when the transmission of the second signaling is completed, the second signaling being received by the first cell, and the second signaling indicating that the first signaling was successfully received.

[0440] In one embodiment, the DRX active time dependent on the first signaling includes a DRX active time that begins when the configuration of the second cell is applied, and the first signaling is This indicates that the configuration of the second cell will be applied.

[0441] In one embodiment, a third transmitter 1202 transmits a PDCCH in the second cell, and a third receiver receives a second RRC signaling in the second cell, the second RRC signaling indicating that RRC reconstruction is complete, and the PDCCH indicating the time-frequency resources occupied by the second RRC signaling.

[0442] In one embodiment, the first signaling indicates the timing advance value of the second cell, and the first signaling does not trigger the transmission of a random access preamble in the second cell.

[0443] In one embodiment, the first signaling indicates the timing advance value of the second cell, and the third transmitter 1202 transmits a first message, the first message indicating the timing advance value of the second cell.

[0444] In one embodiment, the third receiver 1201 receives a second message, which indicates a switch to the second cell.

[0445] In one embodiment, the third receiver 1201 comprises a receiving device 418 (including an antenna 420), a receiving processor 470, a multi-antenna receiving processor 472, and a controller / processor 475 as shown in Figure 4 of this application.

[0446] In one embodiment, the third receiver 1201 comprises at least one of the receiving device 418 (including antenna 420), receiving processor 470, multi-antenna receiving processor 472, and controller / processor 475 shown in Figure 4 of this application.

[0447] In one embodiment, the third transmitter 1202 comprises a transmitting device 418 (including an antenna 420), a transmitting processor 416, a multi-antenna transmitting processor 471, and a controller / processor 475 as shown in Figure 4 of this application.

[0448] In one embodiment, the third transmitter 1202 comprises at least one of the following: the transmitting device 418 (including the antenna 420), the transmitting processor 416, the multi-antenna transmitting processor 471, or the controller / processor 475 shown in Figure 4 of this application.

[0449] Those skilled in the art will understand that all or some of the steps in the above method can be completed by programmatically instructing the associated hardware, and that the program can be stored in a computer-readable storage medium such as read-only memory, hard disk, or optical disc. Optionally, all or some of the steps in the above embodiments can also be implemented using one or more integrated circuits. Thus, each module unit in the above embodiments can be implemented in hardware form or in the form of a software functional module. This application is not limited to any particular form of software-hardware combination. Examples of first-type communication nodes or UEs or terminals in this application include, but are not limited to, mobile phones, tablet computers, notebook computers, network cards, low-power devices, enhanced mechanical communications (eMTC) devices, NB-IoT devices, vehicle-mounted communication devices, aircraft, airplanes, drones, remote-controlled airplanes, and other wireless communication devices. Examples of second-type communication nodes or base stations or network-side devices in this application include, but are not limited to, macrocell base stations, microcell base stations, femtocells, relay base stations, eNBs, gNBs, transceivers, and transceivers. Examples include points (TRPs), relay satellites, satellite base stations, aerial base stations, and other wireless communication devices.

[0450] The embodiments described above are merely preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, substitutions of equivalents, improvements, etc., made within the spirit and principles of this application shall be included within the scope of protection of the present invention.

Claims

1. A first node used for wireless communication, A first receiver receives a first RRC signaling, which indicates a DRX active time, the DRX active time being applied to at least a second cell, and receives a first signaling, which indicates a switch to the second cell, in the first cell, and monitors the PDCCH in the second cell during the DRX active time. The DRX active time depends on the first signaling, which is a lower-layer signaling, and is a first node.

2. The first node according to claim 1, wherein the DRX active time dependent on the first signaling includes the DRX active time which begins when the first signaling is received.

3. A second signaling is transmitted in the first cell by a first transmitter, the second signaling indicating that the first signaling has been successfully received. The first node according to claim 1, wherein the DRX active time dependent on the first signaling includes the DRX active time that begins when the transmission of the second signaling is completed.

4. The DRX active time, which depends on the first signaling, includes the DRX active time that begins when the configuration of the second cell is applied. The first node according to claim 1, wherein the first signaling indicates that the configuration of the second cell is applied.

5. A second RRC signaling, comprising a first transmitter that transmits a second RRC signaling in the second cell, indicating that RRC reconstruction is complete. The first node according to any one of claims 1 to 4, wherein the PDCCH is monitored and indicates a time-frequency resource occupied by the second RRC signaling.

6. The first node according to any one of claims 1 to 5, wherein the first signaling indicates a timing advance value of the second cell, and the first signaling does not trigger the transmission of a random access preamble in the second cell.

7. The first receiver receives a third signaling signal before receiving the first signaling signal, A first transmitter transmits a first random access preamble in the second cell in response to receiving the third signaling, The first node according to claim 6, wherein the first random access preamble is used to determine the timing advance value of the second cell.

8. A second node used for wireless communication, A first RRC signaling system includes a second transmitter that transmits a first RRC signaling system, the first signaling system, the first signaling system, the first signaling system, the first signaling system, the first signaling system, the first signaling system, the first signaling system, the first signaling system, the first signaling system, the first signaling system, the first signaling system, the first signaling system, the first transmitter, PDCCH is monitored in the second cell during the DRX active time, the DRX active time depends on the first signaling, and the first signaling is subordinate The second node is layer signaling.

9. The second node according to claim 8, wherein the DRX active time dependent on the first signaling includes the DRX active time which begins when the first signaling is received.

10. A second signaling is provided, the second signaling being received in the first cell, and the second receiver receives the second signaling indicating that the first signaling has been successfully received. The second node according to claim 8, wherein the DRX active time dependent on the first signaling includes the DRX active time that begins when the transmission of the second signaling is completed.

11. The DRX active time, which depends on the first signaling, includes the DRX active time that begins when the configuration of the second cell is applied. The second node according to claim 8, wherein the first signaling indicates that the configuration of the second cell is applied.

12. A third transmitter transmits the PDCCH in the second cell, A second RRC signaling, the second RRC signaling, is received by the second cell, and the third receiver receives the second RRC signaling, which indicates that RRC reconstruction has been completed. The second node according to any one of claims 8 to 11, wherein the PDCCH indicates a time-frequency resource occupied by the second RRC signaling.

13. The second node according to any one of claims 8 to 12, wherein the first signaling indicates a timing advance value of the second cell, and the first signaling does not trigger the transmission of a random access preamble in the second cell.

14. The second transmitter transmits a third signaling signal before transmitting the first signaling signal, The second node according to claim 13, wherein the third signaling is used to trigger the transmission of a first random access preamble in the second cell, and the first random access preamble is used to determine the timing advance value of the second cell.

15. A method in a first node used for wireless communication, A first RRC signaling, which indicates a DRX active time, the DRX active time being applied to at least a second cell, and receiving the first RRC signaling. The first signaling includes receiving the first signaling in the first cell, which indicates a switch to the second cell, and monitoring the PDCCH in the second cell during the DRX active time, The method in the first node wherein the DRX active time depends on the first signaling, and the first signaling is a lower-layer signaling.

16. The method in the first node according to claim 15, wherein the DRX active time dependent on the first signaling includes the DRX active time which begins when the first signaling is received.

17. A second signaling, comprising transmitting a second signaling in the first cell, indicating that the first signaling has been successfully received, The method in the first node according to claim 15, wherein the DRX active time dependent on the first signaling includes the DRX active time that begins when the transmission of the second signaling is completed.

18. The DRX active time, which depends on the first signaling, includes the DRX active time that begins when the configuration of the second cell is applied. The method in the first node according to claim 15, wherein the first signaling indicates that the configuration of the second cell is applied.

19. A second RRC signaling, comprising transmitting a second RRC signaling from the second cell, indicating that RRC reconstruction is complete. The method in the first node according to any one of claims 15 to 18, wherein the PDCCH is monitored and the PDCCH indicates a time-frequency resource occupied by the second RRC signaling.

20. The method in a first node according to any one of claims 15 to 19, wherein the first signaling indicates a timing advance value of the second cell, and the first signaling does not trigger the transmission of a random access preamble in the second cell.

21. Receiving the third signaling before receiving the first signaling, The process includes, in response to receiving the third signaling, transmitting a first random access preamble in the second cell, The method in the first node according to claim 20, wherein the first random access preamble is used to determine the timing advance value of the second cell.

22. A method in a second node used for wireless communication, A first RRC signaling, which indicates a DRX active time, the DRX active time being applied to at least a second cell, and transmitting the first RRC signaling. A first signaling, which includes transmitting the first signaling in the first cell, indicating a switch to the second cell, A method in the second node in which PDCCH is monitored in the second cell during the DRX active time, the DRX active time depending on the first signaling, the first signaling being a lower layer signaling.

23. The method in the second node according to claim 22, wherein the DRX active time dependent on the first signaling includes the DRX active time which begins when the first signaling is received.

24. A second signaling, which includes receiving the second signaling in the first cell, indicating that the first signaling has been successfully received, The method in the second node according to claim 22, wherein the DRX active time dependent on the first signaling includes the DRX active time which begins when the transmission of the second signaling is completed.

25. The DRX active time, which depends on the first signaling, includes the DRX active time that begins when the configuration of the second cell is applied. The method in the second node according to claim 22, wherein the first signaling indicates that the configuration of the second cell is applied.

26. Transmitting the PDCCH in the second cell, A second RRC signaling, the reception of a second RRC signaling in the second cell, indicating that RRC reconstruction has been completed, The method in the second node according to any one of claims 22 to 25, wherein the PDCCH indicates a time-frequency resource occupied by the second RRC signaling.

27. The method in a second node according to any one of claims 22 to 26, wherein the first signaling indicates a timing advance value of the second cell, and the first signaling does not trigger the transmission of a random access preamble in the second cell.

28. This includes transmitting a third signaling signal before transmitting the first signaling signal, The method in a second node according to claim 27, wherein the third signaling is used to trigger the transmission of a first random access preamble in the second cell, and the first random access preamble is used to determine the timing advance value of the second cell.

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