Method used for wireless communications, and apparatus

Abstract

Disclosed in the present application are a method used for wireless communications, and an apparatus. A first node receives a first RRC signaling, the first RRC signaling indicating a DRX active time, and the DRX active time being applied to at least a second cell; receives a first signaling on a first cell, the first signaling instructing switching to the second cell; and monitors the PDCCH within the DRX active time on the second cell, wherein the DRX active time depends on the first signaling, and the first signaling is a low-layer signaling. The present application can effectively reduce cell switching delays.

Description

A method and device for wireless communication Technical Field

[0001] The present application relates to methods and devices in wireless communication systems, and more particularly to methods and devices supporting discontinuous reception (DRX) in wireless communication. Background Art

[0002] DRX is a common method in wireless communications that can reduce power consumption and improve standby time for communication terminals. The base station controls DRX-related timers through DCI (Downlink Control Information) or MAC (Medium Access Control) CE (Control Element), thereby controlling whether the terminal is in the active time in a given time slot or subframe, and further controlling the communication terminal's wireless reception. During the active time, the terminal monitors and receives wireless signals; during the inactive time, the terminal stops monitoring wireless signals.

[0003] When a UE (User Equipment) moves from the coverage of one cell to the coverage of another, it needs to change its serving cell. Existing serving cell changes are typically triggered by L3 (Layer 3) measurements and implemented through RRC (Radio Resource Control) signaling, including reconfiguration with synchronization. Serving cell changes implemented at L3 are characterized by long latency, high signaling overhead, and long interruption times. To overcome these shortcomings, the 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) #94e plenary meeting decided to initiate WI (Work Item) standardization work on L1 / L2 (Layer 1 / Layer 2)-based mobility enhancement technology. The design goal of L1 / L2-based mobility enhancement technology is to achieve fast switching of UE serving cells.

[0004] Summary of the Invention

[0005] Through research, the inventors discovered that in L1 / L2-based mobility enhancement scenarios, how to support DRX requires research. This application discloses a solution to the above problem. In the absence of conflicts, the embodiments and features of the embodiments in the first node of this application can be applied to the second node, and vice versa. In the absence of conflicts, the embodiments and features of the embodiments in this application can be arbitrarily combined with each other. Furthermore, although this application was originally intended for the Uu air interface, it can also be used for the PC5 interface. Furthermore, although the original intention of this application is to use enhanced mobility as a typical scenario or example, this application is also applicable to other scenarios facing similar problems, such as other scenarios that require mobility support, including but not limited to multi-antenna systems, multi-TRP (Transmission Reception Point) systems, capacity enhancement systems, short-range communication systems, unlicensed frequency domain communications, IoT (Internet of Things), URLLC (Ultra Reliable Low Latency Communication) networks, Internet of Vehicles communications, relay communications, dual-connectivity (DC), multi-connectivity (MC), etc., to achieve similar technical effects. In addition, the use of a unified solution for different scenarios (including but not limited to cellular communication scenarios of terminals and base stations) can also help reduce hardware complexity and cost. In particular, the interpretation of the terms (Terminology), nouns, functions, and variables in this application (if not otherwise specified) can refer to the definitions in the 3GPP specification protocols TS38 series and TS37 series.

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

[0007] receiving first RRC signaling, where the first RRC signaling indicates a DRX active time, where the DRX active time is applied to at least a second cell;

[0008] receiving a first signaling on the first cell, where the first signaling indicates a switch to the second cell;

[0009] monitoring the PDCCH during the DRX active time on the second cell;

[0010] The DRX active time depends on the first signaling; the first signaling is a lower layer signaling.

[0011] As an embodiment, the first RRC signaling in the above method indicates the DRX active time, which can effectively support UE power saving.

[0012] As an embodiment, the first signaling in the above method is a lower layer signaling and can implement fast cell switch.

[0013] As an embodiment, the DRX active time in the above method depends on the first signaling, which can effectively reduce the cell switching delay.

[0014] As an embodiment, the DRX active time in the above method depends on the first signaling, which can reduce the risk of cell handover failure.

[0015] As an embodiment, the DRX active time in the above method depends on the first signaling and can increase the DRX active time to complete the cell switching in time.

[0016] As an embodiment, the DRX active time in the above method relies on the first signaling to improve system processing flexibility.

[0017] According to one aspect of the present application, the invention comprises:

[0018] The DRX active time being dependent on the first signaling includes: the DRX active time starting from receiving the first signaling.

[0019] As an embodiment, the above method can avoid entering the DRX inactive time, monitor the PDCCH (Physical Downlink Control CHannel) in time, and reduce the cell handover delay.

[0020] According to one aspect of the present application, the invention comprises:

[0021] Sending second signaling on the first cell, where the second signaling indicates that the first signaling is correctly received;

[0022] The DRX active time being dependent on the first signaling includes: the DRX active time starting from the completion of sending the second signaling.

[0023] As an embodiment, the above method can avoid entering the DRX inactive time, monitor the PDCCH in time, and reduce the cell switching delay.

[0024] According to one aspect of the present application, the invention comprises:

[0025] The DRX active time being dependent on the first signaling includes: the DRX active time starting from when the configuration of the second cell is applied;

[0026] The first signaling indicates that the configuration of the second cell is applied.

[0027] As an embodiment, the above method can avoid entering the DRX inactive time, monitor the PDCCH in time, and reduce the cell switching delay.

[0028] According to one aspect of the present application, the invention comprises:

[0029] Sending a second RRC signaling on the second cell, where the second RRC signaling indicates that the RRC reconfiguration is complete;

[0030] The PDCCH is monitored, and the PDCCH indicates the time-frequency resources occupied by the second RRC signaling.

[0031] As an embodiment, the above method indicates that the network cell switching is successful by sending the second RRC signaling.

[0032] As an embodiment, the above method can speed up the cell switching process, reduce the cell switching delay, and reduce service interruption caused by cell switching by sending the second RRC signaling through the time-frequency resources scheduled by the PDCCH.

[0033] According to one aspect of the present application, the invention comprises:

[0034] The first signaling indicates a timing advance value for the second cell; the first signaling does not trigger sending a random access preamble on the second cell.

[0035] As an embodiment, the above method can speed up the cell switching process, reduce the cell switching delay, and reduce service interruption caused by cell switching by indicating the timing advance value for the second cell through the first signaling.

[0036] As an embodiment, the above method can simplify the random access process by indicating the timing advance value for the second cell through the first signaling.

[0037] As an embodiment, the above method can enable the first node to omit obtaining uplink synchronization with the second cell through a random access process during the handover process by indicating the timing advance value for the second cell through the first signaling.

[0038] As an embodiment, the above method can save signaling overhead by indicating the timing advance value for the second cell through the first signaling.

[0039] As an embodiment, the above method in which the first signaling does not trigger the sending of a random access preamble on the second cell can speed up the cell switching process, reduce the cell switching delay, and reduce service interruption caused by cell switching.

[0040] According to one aspect of the present application, the invention comprises:

[0041] receiving a third signaling before receiving the first signaling;

[0042] In response to receiving the third signaling, sending a first random access preamble on the second cell;

[0043] The first random access preamble is used to determine the timing advance value for the second cell.

[0044] As an embodiment, the above method can enable the network to obtain the timing advance value (timing advance value) sent by the first node to the uplink of the second cell in advance by triggering the sending of the first random access preamble before cell switching, thereby accelerating the cell switching process.

[0045] The present application discloses a method used in a second node of wireless communication, characterized by comprising:

[0046] Sending first RRC signaling, where the first RRC signaling indicates a DRX active time, where the DRX active time is applied to at least the second cell;

[0047] Sending first signaling on the first cell, where the first signaling indicates switching to the second cell;

[0048] The PDCCH is monitored within the DRX active time on the second cell; the DRX active time depends on the first signaling; and the first signaling is a lower layer signaling.

[0049] According to one aspect of the present application, the invention comprises:

[0050] The DRX active time being dependent on the first signaling includes: the DRX active time starting from when the first signaling is received.

[0051] According to one aspect of the present application, the invention comprises:

[0052] receiving second signaling on the first cell, where the second signaling indicates that the first signaling is correctly received;

[0053] The DRX active time being dependent on the first signaling includes: the DRX active time starting from when the second signaling is sent.

[0054] According to one aspect of the present application, the invention comprises:

[0055] The DRX active time being dependent on the first signaling includes: the DRX active time starting from when the configuration of the second cell is applied;

[0056] The first signaling indicates that the configuration of the second cell is applied.

[0057] According to one aspect of the present application, the invention comprises:

[0058] The first signaling indicates a timing advance value for the second cell; the first signaling does not trigger sending a random access preamble on the second cell.

[0059] According to one aspect of the present application, the invention comprises:

[0060] Sending a third signaling before sending the first signaling;

[0061] The third signaling is used to trigger sending a first random access preamble on the second cell; and the first random access preamble is used to determine the timing advance value for the second cell.

[0062] According to one aspect of the present application, the invention comprises:

[0063] A first message is received, the first message indicating the timing advance value for the second cell.

[0064] As an embodiment, the sender of the first message and the receiver of the first random access preamble are co-located.

[0065] As an embodiment, the timing advance value for the second cell indicated in the first message is used to generate the timing advance value for the second cell indicated in the first signaling.

[0066] As an embodiment, the above method can simplify the UE receiving capability by obtaining the timing advance value for the second cell through the first message and the first signaling.

[0067] According to one aspect of the present application, the invention comprises:

[0068] A second message is sent, where the second message indicates switching to the second cell.

[0069] As an embodiment, the second message is sent after the first signaling.

[0070] As an embodiment, the receiver of the second message is co-located with the sender of the PDCCH.

[0071] As an embodiment, the above method can promptly indicate cell switching to the base station of the target cell through the second message.

[0072] The present application discloses a method used in a third node for wireless communication, characterized by comprising:

[0073] receiving a first random access preamble on a second cell;

[0074] The first random access preamble is used to determine a timing advance value for the second cell; a first RRC signaling is received, the first RRC signaling indicates a DRX active time, and the DRX active time is applied to at least the second cell; a first signaling is received on the first cell, the first signaling indicates a switch to the second cell; PDCCH is monitored within the DRX active time on the second cell; 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 sending the first random access preamble.

[0075] According to one aspect of the present application, the invention comprises:

[0076] The DRX active time being dependent on the first signaling includes: the DRX active time starting from when the first signaling is received.

[0077] According to one aspect of the present application, the invention comprises:

[0078] The DRX active time being dependent on the first signaling includes: the DRX active time starting from when the second signaling is sent;

[0079] The second signaling is received on the first cell, and the second signaling indicates that the first signaling is correctly received.

[0080] According to one aspect of the present application, the invention comprises:

[0081] The DRX active time being dependent on the first signaling includes: the DRX active time starting from when the configuration of the second cell is applied;

[0082] The first signaling indicates that the configuration of the second cell is applied.

[0083] According to one aspect of the present application, the invention comprises:

[0084] Sending the PDCCH on the second cell;

[0085] receiving a second RRC signaling on the second cell, where the second RRC signaling indicates that the RRC reconfiguration is complete;

[0086] The PDCCH indicates the time-frequency resources occupied by the second RRC signaling.

[0087] According to one aspect of the present application, the invention comprises:

[0088] The first signaling indicates the timing advance value for the second cell; the first signaling does not trigger sending a random access preamble on the second cell.

[0089] According to one aspect of the present application, the invention comprises:

[0090] A first message is sent, where the first message indicates the timing advance value for the second cell.

[0091] According to one aspect of the present application, the invention comprises:

[0092] A second message is received, where the second message indicates switching to the second cell.

[0093] The present application discloses a first node used for wireless communication, characterized by comprising:

[0094] A first receiver is configured to receive a first RRC signaling, the first RRC signaling indicating a DRX active time, the DRX active time being applied to at least a second cell; receive a first signaling on a first cell, the first signaling indicating a switch to the second cell; and monitor a PDCCH during the DRX active time on the second cell;

[0095] The DRX active time depends on the first signaling; the first signaling is a lower layer signaling.

[0096] The present application discloses a second node used for wireless communication, characterized by comprising:

[0097] The second transmitter sends a first RRC signaling, where the first RRC signaling indicates a DRX active time, where the DRX active time is applied to at least the second cell; and sends a first signaling on the first cell, where the first signaling indicates a switch to the second cell.

[0098] The PDCCH is monitored within the DRX active time on the second cell; the DRX active time depends on the first signaling; and the first signaling is a lower layer signaling.

[0099] The present application discloses a third node used for wireless communication, characterized by comprising:

[0100] A third receiver receives a first random access preamble on a second cell, wherein the first random access preamble is used to determine a timing advance value for the second cell;

[0101] In which, a first RRC signaling is received, the first RRC signaling indicates the DRX active time, and the DRX active time is applied to at least the second cell; a first signaling is received on the first cell, the first signaling indicates switching to the second cell; PDCCH is monitored during the DRX active time on the second cell; 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 sending the first random access preamble. BRIEF DESCRIPTION OF THE DRAWINGS

[0102] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0103] FIG1 illustrates a flow chart of signal processing in a first node according to an embodiment of the present application;

[0104] FIG2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application;

[0105] FIG3 illustrates a schematic diagram of a radio protocol architecture of a user plane and a control plane according to an embodiment of the present application;

[0106] FIG4 illustrates a schematic diagram of hardware modules of a communication device according to an embodiment of the present application;

[0107] FIG5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application;

[0108] FIG6 illustrates a signal transmission flow chart in a backhaul network according to an embodiment of the present application;

[0109] FIG7 illustrates a schematic diagram of DRX active time according to an embodiment of the present application;

[0110] FIG8 illustrates a schematic diagram of DRX active time according to an embodiment of the present application;

[0111] FIG9 illustrates a schematic diagram of DRX active time according to an embodiment of the present application;

[0112] FIG10 illustrates a structural block diagram of a processing device in a first node according to an embodiment of the present application;

[0113] FIG11 illustrates a structural block diagram of a processing device in a second node according to an embodiment of the present application;

[0114] FIG12 illustrates a structural block diagram of a processing device in a third node according to an embodiment of the present application. DETAILED DESCRIPTION

[0115] The technical solution of the present application will be further described in detail below in conjunction with the accompanying drawings. It should be noted that, unless there is a conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

[0116] Example 1

[0117] Embodiment 1 illustrates a signal processing flow chart in a first node according to an embodiment of the present application, as shown in FIG1 .

[0118] In embodiment 1, the first node 100 receives a first RRC signaling in step 101, where the first RRC signaling indicates a DRX active time, and the DRX active time is applied to at least a second cell; in step 102, a first signaling is received on the first cell, where the first signaling indicates a switch to the second cell; in step 103z2, PDCCH is monitored within the DRX active time on the second cell; wherein the DRX active time depends on the first signaling; and the first signaling is a lower layer signaling.

[0119] As an embodiment, a first RRC signaling is received.

[0120] As an embodiment, the first RRC signaling is received on the first cell.

[0121] As an embodiment, the first RRC signaling is received on a serving cell of the first node.

[0122] As an embodiment, the serving cell of the first node includes a SpCell (Special Cell).

[0123] As an embodiment, the serving cell of the first node includes an SCell (Secondary Cell).

[0124] As an embodiment, the serving cell of the first node includes the first cell.

[0125] As an embodiment, the first RRC signaling is RRCReconfiguration (RRC reconfiguration).

[0126] As an embodiment, the first RRC signaling includes a candidate configuration.

[0127] As an embodiment, the first RRC signaling includes a reference configuration.

[0128] As an embodiment, the first RRC signaling includes a candidate target configuration.

[0129] As an embodiment, the first RRC signaling includes a candidate delta configuration.

[0130] As an embodiment, the first RRC signaling includes a CellGroupConfig (cell group configuration) field, and the CellGroupConfig field configures at least one candidate cell.

[0131] As an embodiment, the first RRC signaling is used to configure at least one handover candidate cell, and the at least one handover candidate cell includes the second cell.

[0132] As an embodiment, the first RRC signaling is used to configure air interface resources in the at least one handover candidate cell, and the at least one handover candidate cell includes the second cell.

[0133] As an embodiment, the first RRC signaling indicates the second cell.

[0134] As an embodiment, the first RRC signaling includes the identifier of the second cell.

[0135] As an embodiment, the first RRC signaling is used to configure the second cell.

[0136] As an embodiment, the first RRC signaling is used to configure the air interface resources of the second cell.

[0137] As an embodiment, the first RRC signaling is used to configure a unicast RNTI (Radio Network Temporary Identifier) ​​of the first node in the second cell.

[0138] As an embodiment, the first RRC signaling is used to configure the C (Cell)-RNTI of the first node in the second cell.

[0139] As an embodiment, the first RRC signaling is used to configure air interface resources for performing a random access process on the second cell.

[0140] As an embodiment, the first RRC signaling is used to configure MAC (Medium Access Control) parameters of the at least second cell.

[0141] As an embodiment, the first RRC signaling indicates a DRX active time.

[0142] As an embodiment, the first RRC signaling includes a drx-Config (discontinuous reception configuration) field, the drx-Config field configures DRX-related parameters, and the DRX active time is indicated by the DRX-related parameters.

[0143] As an embodiment, the first RRC signaling configures a DRX on-duration timer (drx-onDurationTimer), including configuring an expiration value of the DRX on-duration timer.

[0144] As an embodiment, the DRX active time includes the time during which the DRX on-duration timer is running.

[0145] As an embodiment, the first RRC signaling configures a DRX inactivity timer (drx-InactivityTimer), including configuring an expiration value of the DRX inactivity timer.

[0146] As an embodiment, the DRX active time includes the time when the DRX inactive timer is running.

[0147] As an embodiment, the first RRC signaling configures a DRX downlink retransmission timer (drx-RetransmissionTimerDL), including configuring an expiration value of the DRX downlink retransmission timer.

[0148] As an embodiment, the DRX active time includes the time during which the DRX downlink retransmission timer on any serving cell is running.

[0149] As an embodiment, the first RRC signaling configures a DRX uplink retransmission timer (drx-RetransmissionTimerUL), including configuring an expiration value of the DRX uplink retransmission timer.

[0150] As an embodiment, the DRX active time includes the time during which the DRX uplink retransmission timer on any serving cell is running.

[0151] As an embodiment, the first RRC signaling configures the DRX long cycle and start offset (drx-LongCycleStartOffset).

[0152] As an embodiment, the first RRC signaling configures a DRX short cycle (drx-ShortCycle).

[0153] As an embodiment, the first RRC signaling configures a DRX short cycle timer (drx-ShortCycleTimer).

[0154] As an embodiment, the first RRC signaling configures a DRX slot offset (drx-SlotOffset).

[0155] As an embodiment, the DRX on-duration timer is periodically in a running state according to the DRX-related parameters configured by the first RRC signaling.

[0156] As an embodiment, when a PDCCH indicating a new transmission is received, the DRX inactivity timer is started or restarted.

[0157] As an embodiment, a timer is in a running state after being started or restarted; the timer is updated at each time interval in the running state; when the timer expires, the timer stops being updated at each time interval.

[0158] As an embodiment, when a timer is started, the value of the timer is set to 0, and the phrase updating the timer includes: adding 1 to the value of the timer; when the value of the timer is the expiration value of the timer, the timer expires.

[0159] As an embodiment, when starting the timer, the value of the timer is set to the expiration value of the timer, and the phrase updating the timer includes: subtracting the value of the timer by 1; when the value of the timer is 0, the timer expires.

[0160] As an embodiment, the DRX active time includes the time when ra-ContentionResolutionTimer (random access contention resolution timer) or msgB-ResponseWindow (message B response window) is running.

[0161] As an embodiment, the DRX active time includes the time when a scheduling request (SR) is sent on a PUCCH (Physical Uplink Control Channel) and is being suspended (ispending).

[0162] As an embodiment, the DRX active time includes the time after successfully receiving the random access response, indicating that the newly transmitted PDCCH identified by the C-RNTI has not yet been received; wherein the random access preamble for the random access response is not selected by the MAC entity from the contention-based random access preamble.

[0163] As an embodiment, the DRX active time is applied to at least the second cell.

[0164] As an embodiment, the DRX active time is configured for multiple cells, and the second cell is one of the multiple cells.

[0165] As an embodiment, the multiple cells form a DRX group.

[0166] As an embodiment, the DRX active time is applied to the DRX group.

[0167] As an embodiment, the DRX active time being applied to at least the second cell means that: the PDCCH is monitored on at least the second cell during the DRX active time.

[0168] As an embodiment, the first signaling is received on the first cell.

[0169] As an embodiment, the first cell is a primary cell (PCell).

[0170] As an embodiment, the first cell is a special cell (Special cell, SpCell).

[0171] As an embodiment, the first cell is a source cell.

[0172] As an embodiment, receiving in a cell means receiving through the air interface resources of a cell.

[0173] As an embodiment, sending on a cell means sending through the air interface resources of a cell.

[0174] As an embodiment, the air interface resources include at least one of time domain resources, frequency domain resources, space domain resources and code domain resources.

[0175] As an embodiment, the first signaling is lower layer signaling.

[0176] As an embodiment, the first signaling is protocol layer signaling below the RRC sublayer.

[0177] As an embodiment, the first signaling is physical layer signaling.

[0178] As an embodiment, the first signaling is DCI.

[0179] As an embodiment, the first signaling is MAC (Medium Access Control) sublayer signaling.

[0180] As an embodiment, the first signaling is MAC CE (Control Element).

[0181] As an embodiment, the first signaling is cell switching signaling.

[0182] As an embodiment, the name of the first signaling includes LTM (L1 / L2-triggered mobility).

[0183] As an embodiment, the name of the first signaling includes switch.

[0184] As an embodiment, the first signaling is LTM cell switch.

[0185] As an embodiment, the first signaling indicates switching to the second cell.

[0186] As an embodiment, the first signaling is a MAC CE, and the first signaling is identified by a logical channel identity (Logical Channel ID, LCID), and the logical channel identity indicates a cell handover.

[0187] As an embodiment, the logical channel identity is a positive integer between 35 and 46, including 35 and 46.

[0188] As an embodiment, the logical channel identity is a positive integer between 0 and 226, including 0 and 226.

[0189] As an embodiment, the first signaling indicates the second cell.

[0190] As an embodiment, the first signaling includes an identifier of the second cell.

[0191] As an embodiment, the first signaling includes a cell identifier, and the cell identifier is used to identify the second cell.

[0192] As an embodiment, the cell identity is a physical cell identity.

[0193] As an embodiment, the cell identifier is a serving cell index.

[0194] As an embodiment, the cell identifier is a candidate cell index (candidate cell index).

[0195] As an embodiment, the cell identifier is a target cell index (target cell index).

[0196] As an embodiment, the identifier of the second cell included in the first signaling is the same as the identifier of the second cell included in the first RRC signaling.

[0197] As an embodiment, the first cell and the second cell belong to the same gNB (new radio node B)-DU (Distributed Unit).

[0198] As an embodiment, the first cell and the second cell belong to different gNB-DUs.

[0199] As an embodiment, the first cell and the second cell belong to the same gNB-CU (Central Unit).

[0200] As an embodiment, the first cell and the second cell belong to different gNB-CUs.

[0201] As an embodiment, the second cell is a service cell of the first node.

[0202] As an embodiment, the first signaling indicates that the special cell and the secondary cell of the first node are swapped; wherein, before receiving the first signaling, the first cell is the SpCell and the second cell is the Scell.

[0203] As an embodiment, the second cell is not a serving cell of the first node.

[0204] As an embodiment, the second cell is a candidate cell for cell switching.

[0205] As an embodiment, the second cell is a target cell of cell handover.

[0206] As an embodiment, the first signaling indicates the beam selected for the second cell.

[0207] As an embodiment, the selected beam is used for downlink reception and uplink transmission in the second cell.

[0208] As an embodiment, the first signaling indication indicates a TCI (Transmission Configuration Indicator) state for the second cell.

[0209] As an embodiment, the PDCCH is monitored during the DRX active time on the second cell.

[0210] As an embodiment, the monitoring includes searching.

[0211] As an embodiment, the monitoring includes monitoring.

[0212] As an embodiment, the phrase monitoring PDCCH includes: determining whether PDCCH exists through energy monitoring.

[0213] As an embodiment, the phrase monitoring PDCCH includes: determining whether PDCCH exists through coherent detection.

[0214] As an embodiment, the phrase monitoring PDCCH includes: determining whether PDCCH exists through maximum likelihood detection.

[0215] As an embodiment, the phrase monitoring PDCCH includes: determining whether PDCCH exists through blind decoding detection.

[0216] As an embodiment, the phrase monitoring PDCCH includes: monitoring PDCCH in a CSS (Common Search Space).

[0217] As an embodiment, the phrase monitoring PDCCH includes: monitoring PDCCH in USS (UE-specific search space, user equipment dedicated search space).

[0218] As an embodiment, the PDCCH is identified by a unicast RNTI.

[0219] As an embodiment, the unicast RNTI uniquely identifies the first node in the second cell.

[0220] As an embodiment, the PDCCH is identified by at least one of C-RNTI, CI (Cancellation Indication)-RNTI, CS (Configured Scheduling)-RNTI, INT (Interruption)-RNTI, SFI (Slot Format Indication)-RNTI, SP (Semi-Persistent)-CSI (Channel State Information)-RNTI, TPC (Transmit Power Control)-PUCCH (Physical Uplink Control Channel)-RNTI, TPC (Transmit Power Control)-PUSCH (Physical Uplink Shared Channel)-RNTI, TPC (Transmit Power Control)-SRS (Sounding Reference Signal)-RNTI, and AI (Availability indication)-RNTI.

[0221] As an embodiment, the PDCCH is identified by at least one of SL (Sidelink)-RNTI, SLCS (Sidelink Configured Scheduling)-RNTI and SL Semi-Persistent Scheduling (SL Semi-Persistent Scheduling) V (Vehicle-to-Everything)-RNTI.

[0222] As an embodiment, the DRX active time depends on the first signaling.

[0223] As an embodiment, the DRX active time is related to the first signaling.

[0224] As an embodiment, the DRX active time depends on the time domain resources occupied by the first signaling.

[0225] As an embodiment, the DRX active time depends on the type of the first signaling, and the type of the first signaling includes MAC CE and DCI.

[0226] As an embodiment, the DRX active time depends on the content of the first signaling.

[0227] As an embodiment, the DRX active time depends on whether the first signaling indicates a timing advance value for the second cell.

[0228] As an embodiment, when the first signaling does not indicate the timing advance value for the second cell, the DRX active time depends on the random access process initiated by the first node in the second cell triggered by the first signaling.

[0229] As an embodiment, when the first signaling indicates the timing advance value for the second cell, the DRX active time depends on the first signaling.

[0230] As an embodiment, the DRX active time depends on the feedback time for the first signaling.

[0231] As an embodiment, the DRX active time depends on the effective time of the first signaling.

[0232] As an embodiment, the start time of the DRX active time depends on the first signaling.

[0233] As an embodiment, the start time of the DRX active time is Q symbols away from the time domain resources occupied by the first signaling.

[0234] As an embodiment, the start time of the DRX active time is Q symbols away from the end time interval of the time domain resources occupied by the first signaling.

[0235] As an embodiment, Q is a positive integer greater than 0.

[0236] As an embodiment, Q is 0.

[0237] As an embodiment, the DRX active time ends when the PDCCH is monitored.

[0238] Example 2

[0239] Embodiment 2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application, as shown in FIG2 . FIG2 illustrates a diagram of a network architecture 200 for NR 5G, LTE (Long-Term Evolution), and LTE-A (Long-Term Evolution Advanced) systems. NR 5G, LTE, or LTE-A network architecture 200 may be referred to as 5GS (5G System) / EPS (Evolved Packet System) 200 or some other appropriate terminology. 5GS / EPS 200 may include one or more UEs (User Equipment) 201, NG-RAN (Next Generation Radio Access Network) 202, 5G Core Network (5GC) / EPC (Evolved Packet Core) 210, Home Subscriber Server (HSS) / Unified Data Management (UDM) 220, and Internet services 230. The 5GS / EPS may interconnect with other access networks, but these entities / interfaces are not shown for simplicity. As shown, the 5GS / EPS provides packet-switched services, but those skilled in the art will readily appreciate that the various concepts presented herein can be extended to networks providing circuit-switched services or other cellular networks. NG-RAN includes NR Node B (gNB) 203 and other gNBs 204. gNB 203 provides user and control plane protocol termination towards UE 201. gNB 203 may connect to other gNBs 204 via an Xn interface (e.g., backhaul). The gNB 203 may also be referred to as a base station, base transceiver station, radio base station, radio transceiver, transceiver functionality, Basic Service Set (BSS), Extended Service Set (ESS), Transmission Reception Point (TRP), or some other appropriate terminology. In a non-terrestrial / satellite network (NTN), the gNB 203 may be a satellite, an aircraft, or a terrestrial base station relayed via a satellite. The gNB 203 provides an access point to the 5GC / EPC 210 for the UE 201.Examples of UE 201 include a cellular phone, a smartphone, a Session Initiation Protocol (SIP) phone, a laptop computer, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a drone, an aircraft, a narrowband Internet of Things device, a machine type communication device, a land vehicle, an automobile, an in-vehicle device, an in-vehicle communication unit, a wearable device, or any other similarly functional device. Those skilled in the art may also refer to UE 201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. The gNB 203 connects to the 5GC / EPC 210 via the S1 / NG interface. The 5GC / EPC 210 includes the MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MMEs / AMFs / SMFs 214, the S-GW (Service Gateway) / UPF (User Plane Function) 212, and the P-GW (Packet Data Network Gateway) / UPF 213. The MME / AMF / SMF 211 is the control node that handles signaling between the UE 201 and the 5GC / EPC 210. Generally, the MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through the S-GW / UPF 212, which itself is connected to the P-GW / UPF 213. The P-GW provides UE IP address allocation and other functions. The P-GW / UPF 213 is connected to Internet Services 230. Internet Services 230 includes operator-specific Internet Protocol services, which may include Internet, Intranet, IMS (IP Multimedia Subsystem), and PS (Packet Switching) streaming services.

[0240] As an embodiment, the UE201 corresponds to the first node in this application.

[0241] As an embodiment, the NR node B203 corresponds to the second node in this application.

[0242] As an embodiment, the NR node B203 corresponds to the third node in this application.

[0243] As an embodiment, the other NR node B204 corresponds to the third node in this application.

[0244] As an embodiment, the UE 201 is a terminal supporting LTM.

[0245] As an embodiment, the UE 201 is a terminal supporting DRX.

[0246] As an embodiment, the gNB203 is a macro cell base station.

[0247] As an embodiment, the gNB203 is a micro cell base station.

[0248] As an embodiment, the gNB203 is a pico cell base station.

[0249] As an embodiment, the gNB203 is a home base station (Femtocell).

[0250] As an embodiment, the gNB203 is a base station device that supports large delay difference.

[0251] As an embodiment, the gNB203 is a flying platform device.

[0252] As an embodiment, the gNB203 is a satellite device.

[0253] As an embodiment, the gNB203 is a test device (e.g., a transceiver that simulates some functions of a base station, a signaling tester).

[0254] As an embodiment, the gNB204 is a macro cell base station.

[0255] As an embodiment, the gNB204 is a micro cell base station.

[0256] As an embodiment, the gNB204 is a pico cell base station.

[0257] As an embodiment, the gNB204 is a home base station (Femtocell).

[0258] As an embodiment, the gNB204 is a base station device that supports large delay difference.

[0259] As an embodiment, the gNB204 is a flying platform device.

[0260] As an embodiment, the gNB204 is a satellite device.

[0261] As an embodiment, the gNB204 is a test device (e.g., a transceiver that simulates some functions of a base station, a signaling tester).

[0262] As an embodiment, the wireless link from the UE201 to the gNB203 / the gNB204 is an uplink, and the uplink is used to perform uplink transmission.

[0263] As an embodiment, the wireless link from the gNB203 / the gNB204 to the UE201 is a downlink, and the downlink is used to perform downlink transmission.

[0264] As an embodiment, the UE201 and the gNB203 / the gNB204 are respectively connected via a Uu interface.

[0265] Example 3

[0266] Embodiment 3 illustrates a schematic diagram of the radio protocol architecture for the user plane and control plane according to one embodiment of the present application, as shown in FIG3 . FIG3 is a schematic diagram illustrating an embodiment of the radio protocol architecture for the user plane 350 and control plane 300. FIG3 illustrates the radio protocol architecture for the control plane 300 of the UE and gNB using three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (L1) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY 301. Layer 2 (L2) 305 is above PHY 301 and is responsible for the link between the UE and gNB via PHY 301. L2 305 includes the MAC (Medium Access Control) sublayer 302, the RLC (Radio Link Control) sublayer 303, and the PDCP (Packet Data Convergence Protocol) sublayer 304. These sublayers terminate at the gNB on the network side. The PDCP sublayer 304 provides data encryption and integrity protection and also supports UE mobility between gNBs. The RLC sublayer 303 provides packet segmentation and reassembly, enabling retransmission of lost packets through ARQ. The RLC sublayer 303 also provides duplicate packet detection and protocol error detection. The MAC sublayer 302 provides mapping between logical and transport channels and multiplexing of logical channel identities. The MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) within a cell between UEs. It is also responsible for HARQ (Hybrid Automatic Repeat Request) operations. The RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3) of the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring lower layers using RRC signaling between the gNB and the UE. Although not shown in the figure, a V2X layer may be provided above the RRC sublayer 306 in the control plane 300 of the UE. The V2X layer is responsible for generating a PC5 QoS parameter group and QoS rules based on the received service data or service request, generating a PC5 QoS flow corresponding to the PC5 QoS parameter group, and sending the PC5 QoS flow identifier and the corresponding PC5 QoS parameter group to the AS (Access Stratum) layer for the AS layer to perform QoS processing on the data packets belonging to the PC5 QoS flow identifier; the V2X layer also includes a PC5-S signaling protocol (PC5-Signaling Protocol) sublayer, and the V2X layer is responsible for instructing 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 includes Layer 1 (L1) and Layer 2 (L2). The radio protocol architecture in the user plane 350 is generally identical to the corresponding layers and sublayers in the control plane 300, including the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355. However, the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 also includes the SDAP (Service Data Adaptation Protocol) sublayer 356, which is responsible for mapping QoS (Quality of Service) flows to data radio bearers (DRBs) to support service diversity. The wireless protocol architecture of the UE in the user plane 350 may include, at the L2 layer, the SDAP sublayer 356, the PDCP sublayer 354, some or all of the protocol sublayers of the RLC sublayer 353 and the MAC sublayer 352. Although not shown, the UE may also have several upper layers above the L2 layer 355, including a network layer (e.g., an IP layer) terminated at the P-GW on the network side and an application layer terminated at the other end of the connection (e.g., a remote UE, a server, etc.).

[0267] As an embodiment, the wireless protocol architecture in FIG3 is applicable to the first node in this application.

[0268] As an embodiment, the wireless protocol architecture in FIG3 is applicable to the second node in this application.

[0269] As an embodiment, the wireless protocol architecture in FIG3 is applicable to the third node in this application.

[0270] As an embodiment, the first RRC signaling in this application is generated in the RRC306.

[0271] As an embodiment, the first signaling in the present application is generated by the MAC302 or the MAC352.

[0272] As an embodiment, the first signaling in the present application is generated in the PHY301 or the PHY351.

[0273] As an embodiment, the second signaling in the present application is generated in the PHY301 or the PHY351.

[0274] As an embodiment, the third signaling in the present application is generated in the PHY301 or the PHY351.

[0275] As an embodiment, the second RRC signaling in this application is generated in the RRC306.

[0276] As an embodiment, the L2 layer 305 or 355 belongs to a higher layer.

[0277] As an embodiment, the RRC sublayer 306 in the L3 layer belongs to a higher layer.

[0278] Example 4

[0279] Embodiment 4 illustrates a hardware module diagram of a communication device according to an embodiment of the present application, as shown in FIG4. FIG4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.

[0280] The first communication device 450 includes a controller / processor 459 , a memory 460 , a data source 467 , a transmit processor 468 , a receive processor 456 , a multi-antenna transmit processor 457 , a multi-antenna receive processor 458 , a transmitter / receiver 454 and an antenna 452 .

[0281] The second communication device 410 includes a controller / processor 475 , a memory 476 , a data source 477 , a receive processor 470 , a transmit processor 416 , a multi-antenna receive processor 472 , a multi-antenna transmit processor 471 , a transmitter / receiver 418 and an antenna 420 .

[0282] During transmission from the second communications device 410 to the first communications device 450, at the second communications device 410, upper layer data packets from the core network or from a data source 477 are provided to a controller / processor 475. The core network and data source 477 represent all protocol layers above the L2 layer. The controller / processor 475 implements L2 layer functionality. During transmission from the second communications device 410 to the first communications device 450, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communications device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmission of lost packets and signaling to the first communications device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). The transmit processor 416 implements coding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, as well as mapping of signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M-phase-shift keying (M-PSK), and M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming on the coded and modulated symbols to generate one or more spatial streams. The transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes it with a reference signal (e.g., a pilot) in the time and / or frequency domain, and then uses an inverse fast Fourier transform (IFFT) to generate a physical channel carrying the time-domain multicarrier symbol stream. The multi-antenna transmit processor 471 then performs transmit analog precoding / beamforming operations on the time-domain multicarrier symbol stream. Each transmitter 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream, and then provides it to a different antenna 420.

[0283] During transmission from the second communication device 410 to the first communication device 450, at the first communication device 450, each receiver 454 receives a signal via its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the RF carrier and converts the RF stream into a baseband multi-carrier symbol stream, which is provided to the receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 implement various L1 signal processing functions. The multi-antenna receive processor 458 performs receive analog precoding / beamforming operations on the baseband multi-carrier symbol stream from the receiver 454. The receive processor 456 converts the baseband multi-carrier symbol stream, after the receive analog precoding / beamforming operations, from the time domain to the frequency domain using a fast Fourier transform (FFT). In the frequency domain, the receive processor 456 demultiplexes the physical layer data signal and reference signal, where the reference signal is used for channel estimation. The data signal undergoes multi-antenna detection in the multi-antenna receive processor 458 to recover any spatial streams destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered in the receive processor 456, and soft decisions are generated. The receive processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communication device 410 on the physical channel. The upper layer data and control signals are then provided to the controller / processor 459. The controller / processor 459 implements the functions of the L2 layer. The controller / processor 459 may be associated with a memory 460 that stores program code and data. The memory 460 may be referred to as a computer-readable medium. During transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover the upper layer data packets from the second communication device 410. The upper layer data packets are then provided to all protocol layers above the L2 layer. Various control signals may also be provided to the L3 layer for L3 processing.

[0284] During transmission from the first communications device 450 to the second communications device 410, upper layer data packets are provided to the controller / processor 459 at the first communications device 450 using a data source 467. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmission functionality at the second communications device 410 described in the transmission from the second communications device 410 to the first communications device 450, the controller / processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels, implementing L2 layer functions for both the user plane and the control plane. The controller / processor 459 is also responsible for retransmission of lost packets and signaling to the second communications device 410. The transmit processor 468 performs modulation mapping and channel coding, while the multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming. The transmit processor 468 then modulates the resulting spatial stream into a multi-carrier / single-carrier symbol stream. After analog precoding and beamforming operations in the multi-antenna transmit processor 457, the stream is provided to different antennas 452 via the transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a RF symbol stream before providing it to the antenna 452.

[0285] During transmission from the first communication device 450 to the second communication device 410, the functionality at the second communication device 410 is similar to the reception functionality at the first communication device 450 described for transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives RF signals via its corresponding antenna 420, converts the received RF signals into baseband signals, and provides the baseband signals to the multi-antenna receive processor 472 and the receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 collectively implement the L1 layer functionality. The controller / processor 475 implements the L2 layer functionality. 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. During transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover upper layer data packets from the first communication device 450. The controller / processor 475 may provide upper layer data packets to the core network or all protocol layers above the L2 layer, and may also provide various control signals to the core network or L3 for L3 processing.

[0286] As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor, and the first communication device 450 apparatus at least: receives a first RRC signaling, the first RRC signaling indicates a DRX active time, the DRX active time is applied to at least a second cell; receives a first signaling on a first cell, the first signaling indicates a switch to the second cell; monitors PDCCH within the DRX active time on the second cell; wherein the DRX active time depends on the first signaling; the first signaling is a lower layer signaling.

[0287] As an embodiment, the first communication device 450 apparatus includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates an action when executed by at least one processor, the action including: receiving a first RRC signaling, wherein the first RRC signaling indicates a DRX active time, and the DRX active time is applied to at least a second cell; receiving a first signaling on a first cell, wherein the first signaling indicates a switch to the second cell; monitoring PDCCH within the DRX active time on the second cell; wherein the DRX active time depends on the first signaling; and the first signaling is a lower layer signaling.

[0288] As an embodiment, the second communication device 410 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor. The second communication device 410 at least: sends a first RRC signaling, the first RRC signaling indicating a DRX active time, the DRX active time being applied to at least a second cell; sends a first signaling on the first cell, the first signaling indicating a switch to the second cell; wherein the PDCCH is monitored during the DRX active time on the second cell; the DRX active time depends on the first signaling; and the first signaling is a lower layer signaling.

[0289] As an embodiment, the second communication device 410 apparatus includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates an action when executed by at least one processor, the action including: sending a first RRC signaling, wherein the first RRC signaling indicates a DRX active time, and the DRX active time is applied to at least a second cell; sending a first signaling on the first cell, wherein the first signaling indicates a switch to the second cell; wherein the PDCCH is monitored within the DRX active time on the second cell; the DRX active time depends on the first signaling; and the first signaling is a lower layer signaling.

[0290] As an embodiment, the second communication device 410 apparatus includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor. The second communication device 410 apparatus at least: receives a first random access preamble on a second cell; wherein the first random access preamble is used to determine a timing advance value for the second cell; wherein a first RRC signaling is received, the first RRC signaling indicates a DRX active time, and the DRX active time is applied to at least the second cell; a first signaling is received on the first cell, the first signaling indicating a switch to the second cell; a PDCCH is monitored within the DRX active time on the second cell; 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, the third signaling being used to trigger sending the first random access preamble.

[0291] As an embodiment, the second communication device 410 apparatus includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generating actions when executed by at least one processor, the actions including: receiving a first random access preamble on a second cell; wherein the first random access preamble is used to determine a timing advance value for the second cell; wherein a first RRC signaling is received, the first RRC signaling indicates a DRX active time, and the DRX active time is applied to at least the second cell; a first signaling is received on the first cell, the first signaling indicating a switch to the second cell; PDCCH is monitored within the DRX active time on the second cell; 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 sending of the first random access preamble.

[0292] As an 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.

[0293] As an 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.

[0294] As an embodiment, the first communication device 450 is a UE.

[0295] As an embodiment, the first communication device 450 is a relay.

[0296] As an embodiment, the second communication device 410 is a base station device.

[0297] As an embodiment, the second communication device 410 is a distribution unit of a base station.

[0298] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller / processor 475 is used to send the first RRC signaling in this application.

[0299] As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456 or the controller / processor 459 is used to receive the first RRC signaling in this application.

[0300] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller / processor 475 is used to send the first signaling in this application.

[0301] As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456 or the controller / processor 459 is used to receive the first signaling in this application.

[0302] As an embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468 or the controller / processor 459 is used to send the second signaling in this application.

[0303] As an embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna reception processor 472, the reception processor 470 or the controller / processor 475 is used to receive the second signaling in this application.

[0304] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller / processor 475 is used to send the third signaling in this application.

[0305] As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456 or the controller / processor 459 is used to receive the third signaling in this application.

[0306] As an embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468 or the controller / processor 459 is used to send the second RRC signaling in this application.

[0307] As an embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna reception processor 472, the reception processor 470 or the controller / processor 475 is used to receive the second RRC signaling in this application.

[0308] Example 5

[0309] Example 5 illustrates a wireless signal transmission flow chart according to one embodiment of the present application, as shown in FIG5 . In FIG5 , a first node N51 and a second node N52 communicate via a wireless interface, and a first node N51 and a third node N53 communicate via a wireless interface. It should be noted that the order in this example does not limit the signal transmission sequence and implementation order in this application.

[0310] 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 sent in step S513; the first signaling is received in step S514; the second signaling is sent in step S515; the PDCCH is received in step S516; and the second RRC signaling is sent in step S517.

[0311] For the second node N52, the first RRC signaling is sent in step S521; the third signaling is sent in step S522; the first signaling is sent in step S523; and the second signaling is received in step S524.

[0312] For the third node N53, a first random access preamble is received in step S531; a PDCCH is sent in step S532; and a second RRC signaling is received in step S533.

[0313] In embodiment 5, a first RRC signaling is received, the first RRC signaling indicating a DRX active time, the DRX active time being applied to at least a second cell; a first signaling is received on a first cell, the first signaling indicating a switch to the second cell; a PDCCH is monitored during the DRX active time on the second cell; wherein the DRX active time depends on the first signaling; the first signaling is a lower layer signaling; a second signaling is sent on the first cell, the second signaling indicating that the first signaling is correctly received; a second RRC signaling is sent on the second cell, the second RRC signaling indicating that RRC reconfiguration is completed; wherein the PDCCH is monitored, the PDCCH indicating the time-frequency resources occupied by the second RRC signaling; the first signaling indicates a timing advance value for the second cell; the first signaling does not trigger sending a random access preamble on the second cell; a third signaling is received before receiving the first signaling; and as a response to receiving the third signaling, a first random access preamble is sent on the second cell; wherein the first random access preamble is used to determine the timing advance value for the second cell.

[0314] In embodiment 5, the transmission between the first node N51 and the second node N52 is carried out through at least the first cell; the transmission between the first node N51 and the third node N53 is carried out through the second cell.

[0315] As an embodiment, the second node N52 and the third node N53 are co-located.

[0316] As an embodiment, the second node N52 and the third node N53 are the same node.

[0317] As an embodiment, the second node N52 and the third node N53 are the same gNB-DU.

[0318] As an embodiment, the second node N52 and the third node N53 are the same Transmit / Receive Point (TRP).

[0319] As an embodiment, the second node N52 and the third node N53 are different nodes.

[0320] As an embodiment, the second node N52 and the third node N53 are different gNB-DUs.

[0321] As an embodiment, the second node N52 and the third node N53 are different gNB-CUs.

[0322] As an embodiment, the second node N52 is a base station of the first cell.

[0323] As an embodiment, the second node N52 is the transceiver point of the first cell.

[0324] As an embodiment, the third node N53 is a base station of the second cell.

[0325] As an embodiment, the third node N53 is the transceiver point of the second cell.

[0326] As an embodiment, the second node N52 is the base station of the serving cell of the first node N51 before the cell switching.

[0327] As an embodiment, the third node N53 is the base station of the serving cell after the cell switching of the first node N51.

[0328] As an embodiment, before cell switching, the second node N52 is the service base station of the special cell of the first node, and the third node N53 is the service base station of the secondary cell (SCell) of the first node; after cell switching, the second node N52 is the service base station of the secondary cell of the first node, and the third node N53 is the service base station of the special cell of the first node.

[0329] As an embodiment, before cell switching, the first cell is a special cell of the first node N51, and the second cell is a secondary cell of the first node N51; after cell switching, the first cell is a secondary cell of the first node N51, and the second cell is a special cell of the first node N51.

[0330] As an embodiment, the third signaling is received before the first signaling is received.

[0331] As an embodiment, the third signaling is received on a serving cell of the first node.

[0332] As an embodiment, the third signaling is received on the first cell.

[0333] As an embodiment, the third signaling is protocol layer signaling below the RRC sublayer.

[0334] As an embodiment, the third signaling is physical layer signaling.

[0335] As an embodiment, the third signaling is DCI.

[0336] As an embodiment, the third signaling is a PDCCH (Physical Downlink Control CHannel) order.

[0337] As an embodiment, the third signaling is an enhanced PDCCH order.

[0338] As an embodiment, the third signaling indicates the second cell.

[0339] As an embodiment, the third signaling includes a cell identifier, and the cell identifier is used to identify the second cell.

[0340] As an embodiment, in response to receiving the third signaling, a first random access (RA) preamble is sent on the second cell.

[0341] As an embodiment, the third signaling indicates the first random access preamble.

[0342] As an embodiment, the third signaling indicates the air interface resources for sending the first random access preamble on the second cell.

[0343] As an embodiment, the third signaling indicates an occasion (occasion) of sending a RACH (Random Access CHannel) of the first random access preamble on the second cell.

[0344] As an embodiment, the third signaling indicates an SS (Synchronization Signals) / PBCH (Physical Broadcast Channel) index used to determine the RACH timing on the second cell.

[0345] As an embodiment, the third signaling indicates an uplink carrier used to send PRACH (Physical Random Access CHannel) on the second cell, and the uplink carrier includes NUL (Normal UpLink) and SUL (Supplementary UpLink).

[0346] As an embodiment, the third signaling indicates that the first random access preamble is contention-free.

[0347] As an embodiment, the first random access preamble is a signature sequence.

[0348] As an embodiment, the first random access preamble is a Gold sequence.

[0349] As an embodiment, the first random access preamble is an M sequence.

[0350] As an embodiment, the first random access preamble is a ZC (Zadoff–Chu) sequence.

[0351] As an embodiment, the first node is configured or instructed that there is no corresponding random access response (Random Access Response, RAR) for the first random access preamble.

[0352] As an embodiment, the first node is configured or instructed not to open a random access response window after sending the first random access preamble.

[0353] As an embodiment, the first random access preamble does not belong to a random access process.

[0354] As an embodiment, the first random access preamble is used to determine a timing advance value (Timing Advance Value) for the second cell.

[0355] As an embodiment, the first signaling indicates the timing advance value for the second cell.

[0356] As an embodiment, the first signaling indicates the timing advance value for at least the second cell.

[0357] As an embodiment, the timing advance value is for multiple cells, and the multiple cells include the second cell.

[0358] As an embodiment, the multiple cells belong to the same TAG (Timing Advance Group).

[0359] As an embodiment, the timing advance value is applied to the cells included in the TAG.

[0360] As an embodiment, the first signaling implicitly indicates the timing advance value for the second cell.

[0361] As an embodiment, the first signaling indicates that the timing advance value for the second cell is the same as the timing advance value for the source cell.

[0362] As a sub-embodiment of the above embodiment, the source cell is the first cell.

[0363] As a sub-embodiment of the above embodiment, the source cell is a serving cell of the first node.

[0364] As an embodiment, the timing advance value indicated by the first signaling for the second cell is the same as the timing advance value of the cells included in the STAG (Secondary Timing Advance Group).

[0365] As an embodiment, the timing advance value indicated by the first signaling for the second cell is the same as the timing advance value of the cells included in the Primary Timing Advance Group (PTAG).

[0366] As an embodiment, the first signaling explicitly indicates the timing advance value for the second cell.

[0367] As an embodiment, the first signaling includes the timing advance value for the second cell.

[0368] As an embodiment, the first signaling includes a TA (Timing Advance) field, and the TA field indicates the timing advance value for the second cell.

[0369] As an embodiment, the timing advance value is 0.

[0370] As an embodiment, the timing advance value is not 0.

[0371] As an embodiment, the first cell and the second cell belong to different TAGs.

[0372] As an embodiment, the first cell and the second cell belong to the same TAG.

[0373] As an embodiment, the timing advance value for the second cell indicated by the first signaling is used to maintain uplink time alignment (Uplink Time Alignment) with the second cell.

[0374] As an embodiment, after receiving and applying the timing advance value for the second cell, the first node considers that the uplink time is aligned with the second cell.

[0375] As an embodiment, a second signaling is sent on the first cell, and the second signaling indicates that the first signaling is correctly received.

[0376] As an embodiment, the second signaling is physical layer signaling.

[0377] As an embodiment, the second signaling is HARQ (Hybrid Automatic Repeat Request)-ACK (ACKnowledgement) feedback.

[0378] As an embodiment, the second signaling is ACK.

[0379] As an embodiment, the second signaling is feedback on the correct reception of a transport block (TB), and the transport block includes the first signaling.

[0380] As an embodiment, the second signaling is feedback on the correct reception of a MAC PDU (Protocol Data Unit), wherein the MAC PDU includes at least one MAC subPDU (sub-protocol data unit), and the at least one MAC subPDU includes the first signaling.

[0381] As an embodiment, after sending the second signaling, the first node disconnects from the first cell.

[0382] As an embodiment, the disconnection from the first cell includes: stopping monitoring the PDCCH on the first cell.

[0383] As an embodiment, the disconnection from the first cell includes: stopping sending uplink channels or uplink signals on the first cell, the uplink channels include PUCCH and PUSCH, and the uplink signals include SRS (Sounding Reference Signal).

[0384] As an embodiment, the disconnection from the first cell includes: the RRC configuration for the first cell is stopped from being applied.

[0385] As an embodiment, the first signaling does not trigger sending of a random access preamble on the second cell during the cell switching process.

[0386] As an embodiment, the first signaling does not trigger initiation of a random access process on the second cell during cell switching.

[0387] As an embodiment, the first node monitors the PDCCH during the DRX active time on the second cell.

[0388] As an embodiment, the PDCCH is monitored on the second cell.

[0389] As an embodiment, the PDCCH indicates a new transmission.

[0390] As an embodiment, the PDCCH schedules downlink transmission.

[0391] As an embodiment, the PDCCH schedules PDSCH (Physical Downlink Shared CHannel) reception.

[0392] As an embodiment, the PDCCH schedules uplink transmission.

[0393] As an embodiment, the PDCCH schedules PUSCH transmission.

[0394] As an embodiment, the PDCCH indicates the time-frequency resources occupied by the second RRC signaling, and the second RRC signaling indicates that the RRC reconfiguration is completed.

[0395] As an embodiment, the PDCCH indicates that the cell switching is successful.

[0396] As an embodiment, when receiving the PDCCH, the first node determines that the cell switching is successful.

[0397] As an embodiment, the PDCCH indicates time-frequency resources for new transmission.

[0398] As an embodiment, a new transmission is indicated when the NDI (New Data Indication) included in the PDCCH is toggled compared to the NDI included in the DCI signaling most recently received by the first node before receiving the PDCCH; wherein the HARQ (Hybrid Automatic Repeat Request) process number (process ID) included in the PDCCH is the same as the HARQ process number included in the DCI signaling most recently received before receiving the PDCCH.

[0399] As a sub-embodiment of the above embodiment, the NDI included in the DCI signaling most recently received before receiving the PDCCH is 0, and the NDI included in the PDCCH is 1, indicating that the NDI included in the PDCCH is inverted.

[0400] As a sub-embodiment of the above embodiment, the NDI included in the DCI signaling most recently received before receiving the PDCCH is 1, and the NDI included in the PDCCH is 0, indicating that the NDI included in the PDCCH is inverted.

[0401] As an embodiment, when the PDCCH indicates that SPS (Semi-Persistent Scheduling) is activated, the PDCCH is used to schedule a new transmission.

[0402] As an embodiment, when the PDCCH indicates multicast SPS activation, the PDCCH is used to schedule a new transmission.

[0403] As an embodiment, when the PDCCH indicates that configuration grant type 2 is activated, the PDCCH is used to schedule a new transmission.

[0404] As an embodiment, when the PDCCH indicates that the configuration secondary link grant of configuration grant type 2 is activated, the second DCCH is used to schedule a new transmission.

[0405] As an embodiment, the first transmission for a transport block (TB) is a new transmission.

[0406] As an embodiment, there is no previous NDI for a transport block (TB) for a new transmission.

[0407] As an embodiment, the second RRC signaling is sent on the second cell.

[0408] As an embodiment, the second RRC signaling is sent on the time-frequency resources indicated by the PDCCH.

[0409] As an embodiment, the second RRC signaling is RRCReconfigurationComplete (RRC reconfiguration completed).

[0410] As an embodiment, the second RRC signaling is used to respond to the first RRC signaling.

[0411] As an embodiment, the second RRC signaling indicates that the cell switching is successful.

[0412] As an embodiment, when receiving the second RRC signaling, the third node N53 determines that the cell switching is successful.

[0413] As an embodiment, the PDCCH is the first PDCCH received on the second cell.

[0414] As an embodiment, the second RRC signaling is included in the first uplink MAC PDU scheduled by the PDCCH.

[0415] As an embodiment, the first transmitter sends a second RRC signaling on the second cell, and the second RRC signaling indicates that the RRC reconfiguration is completed; wherein the first RRC signaling configures the air interface resources for sending the second RRC signaling.

[0416] As a sub-embodiment of the above embodiment, the air interface resource occupied by the second RRC signaling is a configured grant (CG).

[0417] Example 6

[0418] Embodiment 6 illustrates a signal transmission flow chart in a backhaul network according to an embodiment of the present application, as shown in FIG6 . In FIG6 , a second node N62 and a third node N63 communicate through a backhaul network.

[0419] For the second node N62, the first message is received in step S621, and the second message is sent in step S622.

[0420] For the third node N63, the first message is sent in step S631 and the second message is received in step S632.

[0421] Example 6 illustrates a scenario where the second node N62 and the third node N63 are connected via a backhaul network. Example 6 does not exclude scenarios where the second node N62 and the third node N63 are connected via other interfaces, including but not limited to internal interfaces.

[0422] As an embodiment, the second node N62 is a serving base station of the first cell, and the third node N63 is a serving base station of the second cell.

[0423] As an embodiment, the second node N62 is the gNB-DU of the source cell in the cell switching, the third node N63 is the gNB-DU of the target cell in the cell switching, the target cell is the second cell, and the source cell includes the first cell.

[0424] As an embodiment, the second node N62 and the third node N63 can be directly connected or interconnected through a gNB-CU.

[0425] As an embodiment, the third node N63 sends the configuration of the second cell to the second node N62, and the second node N62 sends at least part of the configuration of the second cell to the first node through the first RRC signaling.

[0426] As an embodiment, the configuration of the second cell includes monitoring the USS of the PDCCH.

[0427] As an embodiment, the configuration of the second cell includes monitoring the CSS of the PDCCH.

[0428] As an embodiment, the configuration of the second cell includes the first random access preamble.

[0429] As an embodiment, the configuration of the second cell includes sending air interface resources for the first random access preamble on the second cell.

[0430] As an embodiment, the third signaling triggers the sending of the first random access preamble on the second cell, and the first random access preamble is used by the third node N63 to determine the timing advance value for the second cell; the third node N63 sends a first message to the second node N62, and the first message includes the timing advance value for the second cell. The second node N62 indicates the timing advance value for the second cell through the first signaling so that the first node obtains uplink time alignment with the second cell.

[0431] As an embodiment, the second node N62 sends the first signaling to indicate cell switching; after sending the first signaling, the second node N62 sends a second message to the third node N63.

[0432] As an embodiment, the second message indicates that the cell is switched to the second cell.

[0433] As an embodiment, the second message indicates that uplink and downlink transmission can be performed through the second cell.

[0434] As an embodiment, the second message instructs the second cell to send the PDCCH.

[0435] As an embodiment, the second message indicates the beam selected for the second cell.

[0436] As an embodiment, the second message indicates that the PDCCH is sent through the beam selected for the second cell.

[0437] As an embodiment, the second message indicates that the second RRC signaling is received through the beam selected for the second cell.

[0438] As an embodiment, the first message and the second message are both backhaul network interface messages, wherein the second node N62 and the third node N63 are connected via a backhaul network.

[0439] As an embodiment, the first message and the second message are both internal messages, wherein the second node N62 and the third node N63 are connected via an internal interface.

[0440] Example 7

[0441] Example 7 illustrates a DRX active time diagram according to an embodiment of the present application, as shown in FIG7 .

[0442] As an embodiment, the DRX active time starts from receiving the first signaling.

[0443] As an embodiment, receiving the first signaling includes: the end time of the time domain resources occupied by the first signaling.

[0444] As an embodiment, the received first signaling includes: the end time of the symbol where the time domain resources occupied by the first signaling are located.

[0445] As an embodiment, the received first signaling includes: the end time of the time slot where the time domain resources occupied by the first signaling are located.

[0446] As an embodiment, the received first signaling includes: the end time of the subframe where the time domain resources occupied by the first signaling are located.

[0447] As an embodiment, the DRX active time starts from the first symbol after receiving the first signaling.

[0448] As an embodiment, the DRX active time starts from the first time slot after receiving the first signaling.

[0449] As an embodiment, the DRX active time starts from the first subframe after receiving the first signaling.

[0450] As an embodiment, the DRX active time starts from the first downlink symbol after receiving the first signaling.

[0451] As an embodiment, the DRX active time ends when the PDCCH is received.

[0452] As an embodiment, the DRX active time is the time between receiving the first signaling and receiving the PDCCH.

[0453] As an embodiment, the DRX active time is the time from the first downlink symbol after receiving the first signaling to the time when the PDCCH is received.

[0454] Embodiment 7 illustrates that the DRX active time is the time between receiving the first signaling and receiving the PDCCH.

[0455] Example 8

[0456] Example 8 illustrates a DRX active time diagram according to an embodiment of the present application, as shown in FIG8 .

[0457] As an embodiment, the DRX active time starts from the completion of sending the second signaling.

[0458] As an embodiment, the DRX active time starts from the first symbol after the second signaling is sent.

[0459] As an embodiment, the DRX active time starts from the first time slot after the second signaling is sent.

[0460] As an embodiment, the DRX active time starts from the first subframe after the second signaling is sent.

[0461] As an embodiment, the DRX active time starts from the first downlink symbol after the second signaling is sent.

[0462] As an embodiment, the DRX active time is the time between sending the second signaling and receiving the PDCCH.

[0463] As an embodiment, the DRX active time is the time from the first downlink symbol after the second signaling is sent to the time when the PDCCH is received.

[0464] As an embodiment, the sending time of the second signaling depends on the first signaling.

[0465] As an embodiment, the sending time of the second signaling is indicated by the PDCCH that schedules the first signaling.

[0466] As an embodiment, the time between the sending of the second signaling and the receiving of the first signaling is indicated by the PDCCH that schedules the first signaling.

[0467] Embodiment 8 illustrates that the DRX active time is the time between sending the second signaling and receiving the PDCCH.

[0468] Example 9

[0469] Example 9 illustrates a DRX active time diagram according to an embodiment of the present application, as shown in FIG9 .

[0470] As an embodiment, the first signaling indicates that the configuration of the second cell is applied.

[0471] As an embodiment, the first signaling implicitly indicates that the configuration of the second cell is applied.

[0472] As an embodiment, the configuration of the second cell being applied includes: the configuration of the second cell replacing the current configuration of the first node.

[0473] As an embodiment, the configuration of the second cell is applied including: performing RRC reconfiguration using the configuration of the second cell.

[0474] As an embodiment, the configuration of the second cell is applied including: performing RRC reconfiguration using the configuration of the second cell, and not performing L2 (Layer 2) reset.

[0475] As an embodiment, the time when the configuration of the second cell is applied is determined by the UE itself.

[0476] As an embodiment, the time when the configuration of the second cell is applied is determined according to the UE capability.

[0477] As an embodiment, the time interval between the application of the configuration of the second cell and the reception of the first signaling is no more than Q1 symbols; wherein Q1 is a non-negative integer.

[0478] As an embodiment, the DRX active time starts from when the configuration of the second cell is applied.

[0479] As an embodiment, the DRX active time is the time from when the configuration of the second cell is applied to when the PDCCH is received.

[0480] Embodiment 9 illustrates that the DRX active time is the time between the application of the configuration of the second cell and the reception of the PDCCH.

[0481] Example 10

[0482] Embodiment 11 illustrates a structural block diagram of a processing device in a first node according to an embodiment of the present application, as shown in FIG10. In FIG10, the first node processing device 1000 includes a first receiver 1001 and a first transmitter 1002; the first node 1000 is a UE.

[0483] In embodiment 10, a first receiver 1001 receives a first RRC signaling, wherein the first RRC signaling indicates a DRX active time, and the DRX active time is applied to at least a second cell; receives a first signaling on a first cell, wherein the first signaling indicates a switch to the second cell; monitors PDCCH within the DRX active time on the second cell; wherein the DRX active time depends on the first signaling; and the first signaling is a lower layer signaling.

[0484] As an embodiment, the DRX active time being dependent on the first signaling includes: the DRX active time starting from receiving the first signaling.

[0485] As an embodiment, the first transmitter 1002 sends a second signaling on the first cell, and the second signaling indicates the correct reception of the first signaling; wherein the DRX active time depends on the first signaling, including: the DRX active time starts from the completion of sending the second signaling.

[0486] As an embodiment, the DRX active time depends on the first signaling, including: the DRX active time starts from the application of the configuration of the second cell; wherein, the first signaling indicates that the configuration of the second cell is applied.

[0487] As an embodiment, the first transmitter 1002 sends a second RRC signaling on the second cell, where the second RRC signaling indicates that the RRC reconfiguration is completed; wherein the PDCCH is monitored, and the PDCCH indicates the time-frequency resources occupied by the second RRC signaling.

[0488] As an embodiment, the first signaling indicates a timing advance value for the second cell; the first signaling does not trigger sending a random access preamble on the second cell.

[0489] As an embodiment, the first signaling indicates a timing advance value for the second cell; the first receiver 1001 receives a third signaling before receiving the first signaling; the first transmitter 1002 sends a first random access preamble on the second cell in response to receiving the third signaling; wherein the first random access preamble is used to determine the timing advance value for the second cell.

[0490] As an embodiment, the first receiver 1001 includes the receiver 454 (including the antenna 452), the receiving processor 456, the multi-antenna receiving processor 458 and the controller / processor 459 in FIG. 4 of the present application.

[0491] As an embodiment, the first receiver 1001 includes at least one of the receiver 454 (including the antenna 452), the receiving processor 456, the multi-antenna receiving processor 458 or the controller / processor 459 in FIG. 4 of the present application.

[0492] As an embodiment, the first transmitter 1002 includes the transmitter 454 (including the antenna 452), the transmit processor 468, the multi-antenna transmit processor 457 and the controller / processor 459 in FIG. 4 of the present application.

[0493] As an embodiment, the first transmitter 1002 includes at least one of the transmitter 454 (including the antenna 452), the transmit processor 468, the multi-antenna transmit processor 457 or the controller / processor 459 in FIG. 4 of the present application.

[0494] Example 11

[0495] Embodiment 11 illustrates a structural block diagram of a processing device in a second node according to an embodiment of the present application, as shown in FIG11 . In FIG11 , a second node processing device 1100 includes a second receiver 1101 and a second transmitter 1102 ; the second node 1100 is a base station or a gNB-DU.

[0496] In embodiment 11, a second transmitter sends a first RRC signaling, wherein the first RRC signaling indicates a DRX active time, and the DRX active time is applied to at least a second cell; a first signaling is sent on the first cell, wherein the first signaling indicates a switch to the second cell; wherein PDCCH is monitored during the DRX active time on the second cell; the DRX active time depends on the first signaling; and the first signaling is a lower layer signaling.

[0497] As an embodiment, the DRX active time being dependent on the first signaling includes: the DRX active time starting from when the first signaling is received.

[0498] As an embodiment, the second receiver 1101 receives a second signaling on the first cell, and the second signaling indicates that the first signaling is correctly received; wherein, the DRX active time depends on the first signaling, including: the DRX active time starts from when the second signaling is sent.

[0499] As an embodiment, the DRX active time depends on the first signaling, including: the DRX active time starts from the application of the configuration of the second cell; wherein, the first signaling indicates that the configuration of the second cell is applied.

[0500] As an embodiment, the first signaling indicates a timing advance value for the second cell; the first signaling does not trigger sending a random access preamble on the second cell.

[0501] As an embodiment, the first signaling indicates a timing advance value for the second cell; the second transmitter 1102 sends a third signaling before sending the first signaling; wherein the third signaling is used to trigger sending a first random access preamble on the second cell; and the first random access preamble is used to determine the timing advance value for the second cell.

[0502] As an embodiment, the first signaling indicates a timing advance value for the second cell; the second receiver 1101 receives a first message, and the first message indicates the timing advance value for the second cell.

[0503] As an embodiment, the second transmitter 1102 sends a second message, where the second message indicates switching to the second cell.

[0504] As an embodiment, the second receiver 1101 includes the receiver 418 (including the antenna 420 ), the receiving processor 470 , the multi-antenna receiving processor 472 and the controller / processor 475 in FIG. 4 of the present application.

[0505] As an embodiment, the second receiver 1101 includes at least one of the receiver 418 (including the antenna 420), the receiving processor 470, the multi-antenna receiving processor 472 and the controller / processor 475 in FIG. 4 of the present application.

[0506] As an embodiment, the second transmitter 1102 includes the transmitter 418 (including the antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 and the controller / processor 475 in FIG. 4 of the present application.

[0507] As an embodiment, the second transmitter 1102 includes at least one of the transmitter 418 (including the antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 or the controller / processor 475 in FIG. 4 of the present application.

[0508] Example 12

[0509] Embodiment 12 illustrates a block diagram of a processing device in a third node according to an embodiment of the present application, as shown in FIG12 . In FIG12 , third node processing device 1200 includes a third receiver 1201 and a third transmitter 1202 ; the third node 1200 is a base station or gNB-DU.

[0510] In embodiment 12, a third receiver 1201 receives a first random access preamble on a second cell; wherein the first random access preamble is used to determine a timing advance value for the second cell; wherein a first RRC signaling is received, the first RRC signaling indicates a DRX active time, and the DRX active time is applied to at least the second cell; wherein a first signaling is received on the first cell, the first signaling indicates a switch to the second cell; within the DRX active time on the second cell, PDCCH is monitored; 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 sending of the first random access preamble.

[0511] As an embodiment, the DRX active time being dependent on the first signaling includes: the DRX active time starting from when the first signaling is received.

[0512] As an embodiment, the DRX active time depends on the first signaling, including: the DRX active time starts from when the second signaling is sent; wherein, the second signaling is received on the first cell, and the second signaling indicates that the first signaling is correctly received.

[0513] As an embodiment, the DRX active time depends on the first signaling, including: the DRX active time starts from the application of the configuration of the second cell; wherein, the first signaling indicates that the configuration of the second cell is applied.

[0514] As an embodiment, the third transmitter 1202 sends the PDCCH on the second cell; the third receiver receives the second RRC signaling on the second cell, and the second RRC signaling indicates that the RRC reconfiguration is completed; wherein the PDCCH indicates the time-frequency resources occupied by the second RRC signaling.

[0515] As an embodiment, the first signaling indicates the timing advance value for the second cell; the first signaling does not trigger the sending of a random access preamble on the second cell.

[0516] As an embodiment, the first signaling indicates the timing advance value for the second cell; the third transmitter 1202 sends a first message, and the first message indicates the timing advance value for the second cell.

[0517] As an embodiment, the third receiver 1201 receives a second message, where the second message indicates switching to the second cell.

[0518] As an embodiment, the third receiver 1201 includes the receiver 418 (including the antenna 420 ), the receiving processor 470 , the multi-antenna receiving processor 472 and the controller / processor 475 in FIG. 4 of the present application.

[0519] As an embodiment, the third receiver 1201 includes at least one of the receiver 418 (including the antenna 420), the receiving processor 470, the multi-antenna receiving processor 472 and the controller / processor 475 in FIG. 4 of the present application.

[0520] As an embodiment, the third transmitter 1202 includes the transmitter 418 (including the antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 and the controller / processor 475 in FIG. 4 of the present application.

[0521] As an embodiment, the third transmitter 1202 includes at least one of the transmitter 418 (including the antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 or the controller / processor 475 in FIG. 4 of the present application.

[0522] Those skilled in the art will appreciate that all or part of the steps in the above method can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk or an optical disk. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment can be implemented in the form of hardware or in the form of a software functional module. The present application is not limited to any specific form of combination of software and hardware. The first type of communication node or UE or terminal in the present application includes but is not limited to mobile phones, tablets, notebooks, network cards, low-power devices, eMTC (enhanced Machine Type Communication) devices, NB-IoT devices, vehicle-mounted communication equipment, aircraft, airplanes, drones, remote-controlled aircraft and other wireless communication devices. The second type of communication node or base station or network-side device in the present application includes but is not limited to macrocell base stations, microcell base stations, home base stations, relay base stations, eNBs, gNBs, transmission and reception nodes TRPs (Transmission and Reception Points), relay satellites, satellite base stations, aerial base stations and other wireless communication devices.

[0523] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A first node for wireless communication, It is characterized in that include: A first receiver receives a first RRC signaling, where the first RRC signaling indicates a DRX active time, where the DRX active time is applied to at least a second cell; receiving a first signaling on a first cell, wherein the first signaling indicates switching to the second cell; and monitoring a PDCCH during the DRX active time on the second cell; The DRX active time depends on the first signaling; the first signaling is a lower layer signaling.

2. The first node according to claim 1, It is characterized in that The DRX active time being dependent on the first signaling includes: the DRX active time starts from receiving the first signaling.

3. The first node according to claim 1, It is characterized in that include: A first transmitter sends a second signaling on the first cell, wherein the second signaling indicates that the first signaling is correctly received; The DRX active time being dependent on the first signaling includes: the DRX active time starts after the second signaling is sent.

4. The first node according to claim 1, It is characterized in that The DRX active time being dependent on the first signaling includes: the DRX active time starting from when the configuration of the second cell is applied; The first signaling indicates that the configuration of the second cell is applied.

5. The first node according to any one of claims 1 to 4, It is characterized in that include: The first transmitter sends a second RRC signaling on the second cell, where the second RRC signaling indicates that the RRC reconfiguration is completed; The PDCCH is monitored, and the PDCCH indicates the time-frequency resources occupied by the second RRC signaling.

6. The first node according to any one of claims 1 to 5, It is characterized in that The first signaling indicates a timing advance value for the second cell; the first signaling does not trigger sending a random access preamble on the second cell.

7. The first node according to claim 6, It is characterized in that include: The first receiver receives a third signaling before receiving the first signaling; The first transmitter sends a first random access preamble on the second cell in response to receiving the third signaling; The first random access preamble is used to determine the timing advance value for the second cell.

8. A second node for wireless communication, It is characterized in that include: A second transmitter sends a first RRC signaling, where the first RRC signaling indicates a DRX active time, and the DRX active time is applied to at least a second cell; Sending a first signaling on the first cell, wherein the first signaling indicates switching to the second cell; Among them, PDCCH is monitored within the DRX active time on the second cell; the DRX active time depends on the first signaling; and the first signaling is a lower layer signaling.

9. The second node according to claim 8, It is characterized in that The DRX active time being dependent on the first signaling includes: the DRX active time starting from when the first signaling is received.

10. The second node according to claim 8, It is characterized in that include: A second receiver receives a second signaling on the first cell, wherein the second signaling indicates that the first signaling is correctly received; The DRX active time being dependent on the first signaling includes: the DRX active time starts from when the second signaling is sent.

11. The second node according to claim 8, It is characterized in that The DRX active time being dependent on the first signaling includes: the DRX active time starting from when the configuration of the second cell is applied; The first signaling indicates that the configuration of the second cell is applied.

12. The second node according to any one of claims 8 to 11, It is characterized in that include: A third transmitter sends the PDCCH on the second cell; A third receiver receives a second RRC signaling on the second cell, where the second RRC signaling indicates that the RRC reconfiguration is completed; The PDCCH indicates the time-frequency resources occupied by the second RRC signaling.

13. The second node according to any one of claims 8 to 12, It is characterized in that The first signaling indicates a timing advance value for the second cell; the first signaling does not trigger sending a random access preamble on the second cell.

14. The second node according to claim 13, It is characterized in that include: The second transmitter sends a third signaling before sending the first signaling; The third signaling is used to trigger sending a first random access preamble on the second cell; and the first random access preamble is used to determine the timing advance value for the second cell.

15. A method in a first node for wireless communication, It is characterized in that include: receiving a first RRC signaling, where the first RRC signaling indicates a DRX active time, where the DRX active time is applied to at least a second cell; receiving a first signaling on a first cell, wherein the first signaling indicates switching to the second cell; Monitoring PDCCH during the DRX active time on the second cell; The DRX active time depends on the first signaling; the first signaling is a lower layer signaling.

16. The method in the first node according to claim 15, It is characterized in that The DRX active time being dependent on the first signaling includes: the DRX active time starts from receiving the first signaling.

17. The method in the first node according to claim 15, It is characterized in that include: Sending a second signaling on the first cell, where the second signaling indicates that the first signaling is correctly received; The DRX active time being dependent on the first signaling includes: the DRX active time starts after the second signaling is sent.

18. The method in the first node according to claim 15, It is characterized in that The DRX active time being dependent on the first signaling includes: the DRX active time starting from when the configuration of the second cell is applied; The first signaling indicates that the configuration of the second cell is applied.

19. The method in the first node according to any one of claims 15 to 18, It is characterized in that include: Sending a second RRC signaling on the second cell, where the second RRC signaling indicates that the RRC reconfiguration is complete; The PDCCH is monitored, and the PDCCH indicates the time-frequency resources occupied by the second RRC signaling.

20. The method in the first node according to any one of claims 15 to 19, It is characterized in that The first signaling indicates a timing advance value for the second cell; the first signaling does not trigger sending a random access preamble on the second cell.

21. The method in the first node according to claim 20, It is characterized in that include: receiving a third signaling before receiving the first signaling; In response to receiving the third signaling, sending a first random access preamble on the second cell; The first random access preamble is used to determine the timing advance value for the second cell.

22. A method in a second node for wireless communication, It is characterized in that include: Sending a first RRC signaling, where the first RRC signaling indicates a DRX active time, where the DRX active time is applied to at least a second cell; Sending a first signaling on the first cell, wherein the first signaling indicates switching to the second cell; Among them, PDCCH is monitored within the DRX active time on the second cell; the DRX active time depends on the first signaling; and the first signaling is a lower layer signaling.

23. The method in the second node according to claim 22, It is characterized in that The DRX active time being dependent on the first signaling includes: the DRX active time starting from when the first signaling is received.

24. The method in the second node according to claim 22, It is characterized in that include: receiving a second signaling on the first cell, where the second signaling indicates that the first signaling is correctly received; The DRX active time being dependent on the first signaling includes: the DRX active time starts from when the second signaling is sent.

25. The method in the second node according to claim 22, It is characterized in that The DRX active time being dependent on the first signaling includes: the DRX active time starting from when the configuration of the second cell is applied; The first signaling indicates that the configuration of the second cell is applied.

26. The method in the second node according to any one of claims 22 to 25, It is characterized in that include: Sending the PDCCH on the second cell; receiving a second RRC signaling on the second cell, where the second RRC signaling indicates that the RRC reconfiguration is complete; The PDCCH indicates the time-frequency resources occupied by the second RRC signaling.

27. The method in the second node according to any one of claims 22 to 26, It is characterized in that The first signaling indicates a timing advance value for the second cell; the first signaling does not trigger sending a random access preamble on the second cell.

28. The method in the second node according to claim 27, It is characterized in that include: Sending a third signaling before sending the first signaling; The third signaling is used to trigger sending a first random access preamble on the second cell; and the first random access preamble is used to determine the timing advance value for the second cell.

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