CN113543369A

CN113543369A - Method and equipment used for wireless communication

Info

Publication number: CN113543369A
Application number: CN202010298405.3A
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2021-10-22
Anticipated expiration: 2040-04-16
Also published as: CN113543369B; CN115397038A; CN115589641A

Abstract

A method and apparatus used for wireless communication includes determining a radio link failure with a first serving cell; when the first timer is in a stop state, as a response of determining that a radio link between the first serving cell and the second serving cell fails, selecting a second serving cell, starting the second timer, and sending a first type uplink access signal for the second serving cell; when the first timer is in a running state, sending a first type uplink access signal aiming at a third service cell; wherein the first type of uplink access signal is used to determine that the RRC connection is complete. According to the method and the device, the first type of uplink access signal is sent according to the first timer by reasonably selecting the cell, so that the resource utilization rate is improved, the reliability is improved, and packet loss and interruption are reduced.

Description

Method and equipment used for wireless communication

Technical Field

The present invention relates to a transmission method and apparatus in a wireless communication system, and more particularly, to a transmission method and apparatus for improving system efficiency, optimizing resource utilization, reducing service interruption, improving service continuity, and enhancing reliability in wireless communication.

Background

In the future, the application scenes of the wireless communication system are more and more diversified, and different application scenes put different performance requirements on the system. In order to meet different performance requirements of various application scenarios, research on New Radio interface (NR) technology (or fine Generation, 5G) is decided over 72 sessions of 3GPP (3rd Generation Partner Project) RAN (Radio Access Network), and standardization Work on NR is started over WI (Work Item) where NR passes through 75 sessions of 3GPP RAN.

In communication, both LTE (Long Term Evolution) and 5G NR relate to accurate reception of reliable information, optimized energy efficiency ratio, determination of information validity, flexible resource allocation, the scalable system structure, high-efficiency non-access stratum information processing, low service interruption and disconnection rate, for low power consumption support, which is for normal communication of base stations and user equipments, for reasonable scheduling of resources, the method has important significance for balancing system load, can be said to be high throughput rate, meets Communication requirements of various services, improves spectrum utilization rate, and improves the quality of service, and is essential for eMBBs (enhanced Mobile BroadBand), URLLC (Ultra Reliable Low Latency Communication) or eMTCs (enhanced Machine Type Communication). Meanwhile, in the Internet of Things in the field of the IIoT (Industrial Internet of Things), in V2X (Vehicular to X), in communication between devices (Device to Device), in communication of unlicensed spectrum, in user communication quality monitoring, in Network planning optimization, in NTN (Non terrestrial Network communication), in TN (terrestrial Network communication), in a Dual connectivity (Dual connectivity) system, in a mixture of the above various communication modes, in radio resource management and codebook selection of multiple antennas, in signaling design, neighborhood management, traffic management, and in beamforming, there is a wide demand for transmission of information, which is divided into broadcast and unicast, and both transmission modes are indispensable for a 5G system, because they help to meet the above demand.

With the continuous increase of the scenes and the complexity of the system, higher requirements are put forward on the reduction of the interruption rate, the reduction of the time delay, the enhancement of the reliability, the enhancement of the stability of the system, the flexibility of the service and the saving of the power, and meanwhile, the compatibility among different versions of different systems needs to be considered when the system is designed.

Disclosure of Invention

In many communication scenarios, supporting dual connectivity, i.e. one user equipment connecting two cells, has become an important function of 5G. The problem of maintaining two simultaneous connections at the user equipment arises in the management, when a radio link failure occurs in one link, it may cause two links to respond simultaneously, and these responses may occur independently and in parallel, causing confusion or performance degradation if mishandled. After a link fails, a user can initiate link failure recovery on another link, and in some cases, when a mobility requirement is met, handover may also be triggered, and whether the link fails and whether recovery is being performed through another link does not need to be considered when handover is performed, so that handover may occur simultaneously with a link recovery attempt, and if mishandling causes unpredictable problems, for example, service failure of the user may be caused, and a longer interruption may be caused. Specifically, in the case of dual connectivity, if one connection fails, especially if the secondary connection fails, the other connection may be used to recover the link, and in response, the instruction received by the user in the link recovery process may be reconfiguration, switching, releasing the connection, or the like; on the other hand, for a failed link, handover may occur, and since the quality of the link is generally poor when the link fails, handover is generally more likely to be triggered, so that two parallel flows occur, how to correctly arrange their relationship, how to determine that the flow is effective, when to execute a specified operation, and when to abandon execution is a very important problem, which is not good and likely to cause confusion, and the reasons for these problems include the user performing configuration from a cell at different times, and the situation of flow execution, for example, when a flow is nearly completed, and when a conflict occurs, it is better to keep the flow to be completed, which is more beneficial to the user, and is more beneficial to performance improvement and interruption reduction. Further, when another link also fails, the above problem is encountered in that the ongoing handover or link recovery is interrupted to perform link re-establishment, which is disadvantageous for the user's communication.

In view of the above, the present application provides a solution.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments in any node of the present application may be applied to any other node. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

The application discloses a method in a first node used for wireless communication, comprising:

determining a radio link failure with a first serving cell;

when the first timer is in a stop state, as a response of determining that a radio link between the first serving cell and the second serving cell fails, selecting a second serving cell, starting the second timer, and sending a first type uplink access signal for the second serving cell; when the first timer is in a running state, sending a first type uplink access signal aiming at a third service cell;

wherein the first type of uplink access signal is used to determine that the RRC connection is complete.

As an embodiment, the problem to be solved by the present application includes: when a serving cell, especially a secondary serving cell, of the first node detects a radio link failure, in some cases, according to the prior art, link reestablishment is triggered, the protocol stack is reset by the link reestablishment, a timer is cleared, and the like, which may affect communication of the user, and even if the user is performing handover, the user may enter link reestablishment without terminating, which is unreasonable. This may have an adverse effect on the first node, resulting in interruption of service or reduction in efficiency, and more likely resulting in unnecessary link release, which cannot be solved by the conventional method. The method and the device solve the problems by establishing a new trigger mechanism, so that the first node can flexibly and intelligently process the conflicts and abandon some conflicting action flows at a proper time.

As an example, the benefits of the above method include: selecting a second serving cell as a response for determining that a radio link between the first serving cell and the second serving cell fails, starting the first timer and sending a first type of uplink access signal for the second serving cell by considering the running state of the first timer and combining the running state of the first timer with the first type of uplink access signal, namely when the first timer is in a stop state; when the first timer is in a running state, sending a first type uplink access signal aiming at a third service cell; that is, the user can refuse to perform link reestablishment according to specific situations, and adopt the most powerful strategy for the user, which is favorable for keeping the communication smooth.

Specifically, according to one aspect of the present invention, the method comprises:

the first receiver to receive a first signaling, the first signaling indicating a first set of reference signals, the first signaling indicating a first trigger condition;

the first receiver performing first channel measurements for the first set of reference signals; wherein the first timer is in a running state, the running state of the first timer being started in response to the result of the first channel measurement satisfying the first trigger condition; the first set of reference signals is transmitted by a third serving cell; the first signaling is transmitted by a fourth serving cell.

the first receiver receives a first candidate cell list, the third serving cell being one of the cells in the first candidate cell list, the first candidate cell list indicating candidate cells that can be selected when the first timer is in an active state.

In particular, according to one aspect of the invention, it is characterized in that,

the first receiver receives a second candidate cell list, the second serving cell being one of the second candidate cell list, the second candidate cell list indicating candidate cells that can be selected when the first timer is in a stopped state.

the first receiver receives a second signaling, the second signaling is used for indicating RRC connection establishment, and the first type of uplink access signal is feedback to the second signaling;

the second signaling is sent by the first serving cell, and as a response to receiving the second signaling, the first type uplink access signal for the third serving cell is sent.

the first transmitter restarts the first timer in response to the sending of the first type of uplink access signal for the third serving cell.

Specifically, according to an aspect of the present application, the first node is a user equipment.

Specifically, according to an aspect of the present application, the first node is an internet of things terminal.

Specifically, according to an aspect of the present application, the first node is a relay.

Specifically, according to an aspect of the present application, the first node is a vehicle-mounted terminal.

In particular, according to one aspect of the application, the first node is an aircraft.

The application discloses a first node used for wireless communication, comprising:

a first receiver that determines a radio link failure with a first serving cell;

a first transmitter, configured to select a second serving cell as a response to the determination that the radio link with the first serving cell fails when the first timer is in a stopped state, start a second timer, and transmit a first type of uplink access signal for the second serving cell; when the first timer is in a running state, sending a first type uplink access signal aiming at a third service cell;

As an example, compared with the conventional scheme, the method has the following advantages:

when the first node detects the link failure of the primary serving cell, on one hand, the first node sends an MCGFailureInformation message related to the primary serving cell through the secondary serving cell, and the secondary serving cell of the first node receives the MCGFailureInformation message and performs related processing, such as sending back a message of radio resource reconfiguration or radio resource release, and meanwhile, since the sending and receiving of the MCGFailureInformation message require a certain time, while the secondary serving cell needs more time to process, such as contacting with other cells and contacting with the primary serving cell, while if the primary serving cell is an NTN cell, it may take several seconds or even longer. The first node may also be configured with conditional handover, and after the foregoing MCGFailureInformation message is sent, the conditional handover may be triggered, which also requires some time since the conditional handover itself may involve a random access procedure, and in this process, if a radio link failure occurs in the secondary serving cell, the conventional method may cause radio link re-establishment, and a radio link failure may occur. The method and the device determine how to send the message and how to select the cell by detecting the execution condition of the first timer, which is more beneficial to ensuring the executing handover, especially the handover which is about to succeed can be completed compared with the traditional method, because the link reconstruction caused by the traditional method is not more beneficial to the user than the existing handover, and is probably just started again.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof with reference to the accompanying drawings in which:

fig. 1 illustrates a flow diagram for determining a radio link failure with a first serving cell and transmitting a first type of uplink access signal according to an embodiment of the present application;

FIG. 2 shows a schematic diagram of a network architecture according to an embodiment of the present application;

figure 3 shows a schematic diagram of an embodiment of a radio protocol architecture for the user plane and the control plane according to an embodiment of the present application;

FIG. 4 shows a schematic diagram of a first node, a second node, according to an embodiment of the present application;

FIG. 5 shows a flow diagram of a transmission according to an embodiment of the present application;

FIG. 6 shows a flow diagram of a transmission according to an embodiment of the present application;

FIG. 7 shows a flow diagram of a transmission according to an embodiment of the present application;

FIG. 8 shows a flow diagram of a transmission according to an embodiment of the present application;

fig. 9 is a diagram illustrating that a first type of uplink access signal is used to determine RRC connection completion according to an embodiment of the present application;

fig. 10 shows a schematic diagram of a first candidate cell list indicating candidate cells that may be selected when the first timer is running according to an embodiment of the application;

fig. 11 shows a schematic diagram of a second candidate cell list indicating candidate cells that may be selected when the first timer is in a stopped state according to an embodiment of the application;

fig. 12 illustrates a schematic diagram of a processing device for use in a first node according to an embodiment of the present application.

Detailed Description

The technical solutions of the present application will be further described in detail with reference to the accompanying drawings, and it should be noted that the embodiments and features of the embodiments in the present application can be arbitrarily combined with each other without conflict.

Example 1

Embodiment 1 illustrates a flow chart for determining a radio link failure with a first serving cell and transmitting a first type of uplink access signal according to an embodiment of the present application, as shown in fig. 1. In fig. 1, each block represents a step, and it is particularly emphasized that the sequence of the blocks in the figure does not represent a chronological relationship between the represented steps.

In embodiment 1, a first node in the present application determines that a radio link with a first serving cell fails in step 101; transmitting a first type uplink access signal in step 102;

when the first timer is in a stop state, as a response to the determination that the radio link with the first serving cell fails, selecting a second serving cell, starting the first timer, and sending a first type of uplink access signal for the second serving cell; when the first timer is in a running state, sending a first type uplink access signal aiming at a third service cell;

As an embodiment, the first node is a UE (User Equipment).

As an embodiment, the first serving Cell is an scg (secondary Cell group) of the first node.

As an embodiment, the first serving cell is a cell in the SCG of the first node.

As an embodiment, the first serving cell is a PSCell cell in an SCG of the first node.

As one embodiment, the first serving cell is a PSCell cell of the first node.

As an embodiment, the first serving cell is a cell other than a PCell of the first node.

As an embodiment, the third serving cell is a cell other than the PCell of the first node.

As an embodiment, the third serving cell is a target cell of the first node.

As an embodiment, the third serving cell is the first serving cell.

As one embodiment, the second serving cell is the first serving cell.

As an embodiment, the second serving cell is a cell other than the third serving cell.

As an embodiment, the first type of uplink access signal includes higher layer signaling.

As an embodiment, the first type of uplink access signal includes RRC (Radio Resource Control) signaling.

As an embodiment, the first type of uplink Access signal includes MAC CE (Medium Access Control Element) signaling.

As an embodiment, the first type of Uplink access signal includes UCI (Uplink Control Information).

As an embodiment, the first type of uplink Access signal includes sending a Random Access Preamble (Random Access Preamble sequence) on a specific time-frequency resource.

As a sub-embodiment of this embodiment, the specific time-frequency resource is configured by a serving cell of the first node.

As an embodiment, the first type of uplink Access signal includes using a specific Random Access Preamble.

As a sub-embodiment of this embodiment, the specific Random Access Preamble is configured by the serving cell of the first node.

As an embodiment, the first type of uplink access signal includes rrcconnectionreconfiguration complete.

As an embodiment, the first type uplink access signal includes rrreconfiguration complete.

As an embodiment, the uplink access signal of the first type carries an uplinktxdiretcurrentlist cell.

As an embodiment, the first type uplink access signal carries scg-Response information element.

As an embodiment, the first type of uplink access signal carries rlf-InfoAvailable information element.

As an embodiment, the first type of uplink access signal carries logMeasAvailable cells.

As an embodiment, the first type of uplink access signal carries a connestailfoavailable cell.

As an embodiment, the first type of uplink access signal carries logmeasavailablebms cells.

As an embodiment, the transmission channel occupied by the first type of Uplink access signal includes an UL-SCH (Uplink Shared channel).

As an embodiment, the Physical layer Channel occupied by the first type of Uplink access signal includes a PUSCH (Physical Uplink Shared Channel).

As an embodiment, the Physical layer Channel occupied by the first type of Uplink access signal includes a PUCCH (Physical Uplink Control Channel).

As an embodiment, the Physical layer Channel occupied by the first type of uplink Access signal includes a PRACH (Physical Random Access Channel).

As an embodiment, the first node employs a random access procedure to synchronize with the third serving cell.

As one embodiment, the first node employs a random access procedure to synchronize with the second serving cell when the first transmitter selects the second serving cell.

As an embodiment, the first receiver receives broadcast information of the second serving cell to determine time-frequency resources occupied by the first type uplink access signal for the second serving cell.

As an embodiment, the first receiver receives unicast information of the second serving cell to determine time-frequency resources occupied by the first type uplink access signal for the second serving cell.

As one embodiment, the broadcast Information includes an SIB (System Information Block).

As an embodiment, the broadcast Information includes SIB1(System Information Block1, System message Block 1).

As an embodiment, the first receiver receives RRCReconfiguration information to determine a Preamble used by the first type of uplink access signal.

As an embodiment, a first type of uplink access signal for a serving cell includes: the cell identifier of the one serving cell is used to generate an RS (Reference Signal) sequence of a DMRS (demodulation Reference Signal) included in the one first-type uplink access Signal.

As an embodiment, the cell identity of the first serving cell is used to generate a first scrambling sequence used to scramble the one uplink access signal of the first type.

As an embodiment, a first type of uplink access signal for a serving cell includes: the downlink synchronization timing of the one serving cell is used for the transmission timing of the one first type uplink access signal.

As an embodiment, a first type of uplink access signal for a serving cell includes: measuring a plurality of SSBs (Synchronization Signal blocks) of the serving cell, selecting one SSB, and determining a transmitting antenna parameter of the first type of uplink access Signal according to a receiving antenna parameter of the SSB.

As a sub-embodiment of this embodiment, the first node initiates a random access procedure according to the PRACH occasion associated with the selected one SSB.

As one embodiment, the random access procedure includes contention-based random access.

As one embodiment, the random access procedure includes non-contention based random access.

As a sub-embodiment of this embodiment, the first node initiates a random access procedure according to the selected time-frequency resource of the PRACH associated with the one SSB.

As a sub-embodiment of this embodiment, the first node monitors a PDCCH (Physical Downlink Control Channel) according to the search space indicated by the selected SSB, receives an SIB1(System Information Block 1) according to the indication received on the monitored PDCCH Channel, and the SIB1 is used to configure the time-frequency resource of the PRACH.

As an example, the SSB is a SS/PBCH (Physical Broadcast Channel).

As an embodiment, the first receiver selects the first serving cell according to an internal implementation algorithm.

As an embodiment, the first receiver selects the second serving cell according to an internal implementation algorithm.

As an embodiment, the first receiver selects the third serving cell according to an internal implementation algorithm.

As an embodiment, the first type of uplink access signal includes Msg 3.

As an embodiment, the first type of uplink access signal comprises MsgA.

As an embodiment, the first type of uplink access signal includes Msg1 and Msg 3.

As an embodiment, the first type of uplink access signal includes a Preamble.

As an embodiment, the first type of uplink Access signal includes a Random Access Preamble.

As an embodiment, access stratum security of the first node has been activated.

As an embodiment, the sentence "determining a radio link failure with a first serving cell" includes: an out-of-synchronization (out-of-sync) of the first serving cell is detected and persists until a first time.

As an embodiment, the first node detects the out-of-synchronization (out-of-sync) by a lower layer report.

As a sub-embodiment of this embodiment, the first time is equal to the expiration time of the timer T310 of the first serving cell.

As a sub-embodiment of this embodiment, the first time is equal to the expiration time of the timer T312 of the first serving cell.

As an embodiment, the sentence "determining a radio link failure with a first serving cell" includes, as an embodiment: a problem with random access initiated for the first serving cell is detected and none of timer T300, timer T301, timer T304, timer T311 and timer T319 are running.

As an embodiment, the sentence "determining a radio link failure with a first serving cell" includes: receiving an indication of the Radio Link Control (RLC) of the first serving cell that the maximum number of retransmissions is reached.

As an embodiment, the sentence "determining a radio link failure with a first serving cell" includes: if connected as an IAB (Integrated Access and Backhaul) node, the radio link with the first serving cell is considered to fail when receiving a BH RLF indication from a BAP (Backhaul Access Protocol) entity of the SCG.

As an embodiment, the sentence "determining a radio link failure with a first serving cell" includes: the reception of the persistent uplink lbt (listen Before talk) from the SCG MAC fails and the radio link with the first serving cell is considered to fail.

As an embodiment, the sentence "determining a radio link failure with a first serving cell" includes: detecting a synchronization reconfiguration failure (re-configuration with sync) for the first serving cell.

As a sub-embodiment of this embodiment, the first node detects the synchronization reconfiguration failure for the first serving cell by Monitoring (Monitoring) timer T304 for expiration.

As a sub-embodiment of this embodiment, the first node detects that the synchronization reconfiguration for the first serving cell fails through compatibility to composition with rrcrconfiguration (integrity to compatibility).

As an embodiment, the sentence "determining a radio link failure with a first serving cell" includes: an RRC connection re-establishment (rrcreestablishing) procedure failure is detected.

As a sub-embodiment of this embodiment, the first node detects the RRC connection re-establishment procedure failure by Monitoring (Monitoring) timer T301 to expire.

As an embodiment, the sentence "determining a radio link failure with a first serving cell" includes: radio Link Failure (RLF) is detected.

For one embodiment, the first node determines a radio link failure with a first serving cell by expiration of a T310 associated with the first serving cell.

As an embodiment, the first serving cell configures the T310 through RRC signaling.

As an embodiment, a primary serving cell (PCell) of the first node configures the timer by RRC signaling.

As an embodiment, the primary serving cell (PCell) of the first node configures the timer T310 through RRC signaling.

As an embodiment, the primary serving cell (PCell) of the first node configures the timer T312 through RRC signaling.

For one embodiment, the first node determines a radio link failure with a first serving cell by expiration of a T312 associated with the first serving cell.

As an embodiment, the first serving cell configures the T312 through RRC signaling.

As an embodiment, the sentence "determining a radio link failure with a first serving cell" includes: a Handover (HO) Failure (Failure) is detected.

As a sub-embodiment of this embodiment, the handover failure comprises a Conditional Handover (CHO) failure.

As a sub-embodiment of this embodiment, the Handover Failure includes a Regular Handover Failure (Failure).

As a sub-embodiment of this embodiment, the Handover Failure includes a daps (dual Active Protocol stack) Handover Failure (HOF).

As an embodiment, the act of "selecting a second serving cell" comprises: selecting the second serving cell in a cell selection procedure.

As an embodiment, the act of "selecting a second serving cell" comprises: selecting the second serving cell during a cell reselection.

As an embodiment, the act of "selecting a second serving cell" comprises: selecting the second serving cell as a PCell in a cell selection procedure.

As an embodiment, the act of "selecting a second serving cell" comprises: selecting the second serving cell as the SPCell in a cell selection process.

As an embodiment, the act of "selecting a second serving cell" comprises: and determining the second serving cell as a target cell for handover.

As an embodiment, the act of "selecting a second serving cell" comprises: synchronizing to the second serving cell.

As an embodiment, the act of "selecting a second serving cell" comprises: applying a BCCH (Broadcast Control Channel) configuration of the second serving cell.

As an embodiment, the act of "selecting a second serving cell" comprises: and receiving the MIB broadcasted by the second service cell.

As an embodiment, the act of "selecting a second serving cell" comprises: receiving the SIB1 broadcast by the second serving cell.

As an embodiment, the act of "selecting a second serving cell" comprises: the SIB1 broadcast by the second serving cell is applied.

As an embodiment, the first transmitter selects the second serving cell when the first receiver determines that the radio link with the first serving cell fails.

As one embodiment, the action determination and the radio link failure between the first serving cell trigger the first transmitter to select the second serving cell.

As one embodiment, the first transmitter selecting the second serving cell is a result of a radio link failure between the behavior determination and the first serving cell.

For one embodiment, the first timer is T304.

As an embodiment, the first timer is configured by a serving cell of the first node.

As one embodiment, the first timer is configured by a primary serving cell of the first node.

As an embodiment, the sentence "the first type of uplink access signal for the second serving cell" includes the following meanings: the receiver of the first type of uplink access signal is the second serving cell.

As an embodiment, the sentence "the first type of uplink access signal for the second serving cell" includes the following meanings: and the first type of uplink access signal occupies the time-frequency resource of the second service cell.

As an embodiment, the sentence "the first type of uplink access signal for the second serving cell" includes the following meanings: and the time-frequency resource of the first type of uplink access signal is scheduled by the second service cell.

As an embodiment, the sentence "the first type of uplink access signal for the second serving cell" includes the following meanings: the first type of uplink access signal is synchronized with the second serving cell.

As an embodiment, the sentence "the first type of uplink access signal for the second serving cell" includes the following meanings: the PRACH occase used by the Preamble included in the first type of uplink access signal is associated with the SSB of the second service cell, and the association relationship is configured by the second service cell.

As an embodiment, the sentence "the first type of uplink access signal for the second serving cell" includes the following meanings: and the first type of uplink access signals are sent through a signaling bearer between the first type of uplink access signals and the second serving cell.

As one embodiment, the second timer is the first timer.

As an embodiment, the second timer is a timer other than the first timer.

For one embodiment, the first timer is a timer T304 and the second timer is a timer T311.

For one embodiment, the first timer is a timer T304 and the second timer is the first timer.

As an example, the first timer is a timer T304 whose timer is for the MCG, and the second timer is a timer T311.

As an example, the first timer is timer T304, which is a timer for SCG, and the second timer is timer T311.

As an embodiment, the first timer is a timer T304 for MCG and the second timer is a timer T304 for SCG.

As an embodiment, the first timer is timer T304 for SCG and the second timer is timer T304 for MCG.

As an embodiment, the first timer is a timer T304 of a timer for MCG, and the second timer is the first timer.

As an embodiment, the first timer is a timer T304 that is clocked for SCG and the second timer is the first timer.

As an embodiment, the second timer is configured by a serving cell of the first node.

For one embodiment, the first node is configured with T316.

As one embodiment, the transmission of the SCG of the first node is not suspended until the radio link between the behavior determination and the first serving cell fails.

As an embodiment, when the first timer is in a running state, no response is made to the radio link failure with the first serving cell for the behavior determination.

As an embodiment, the first transmitter selects the third serving cell in response to the behavior determination failing the radio link with the first serving cell while the first timer is running.

As a sub-embodiment of the above embodiment, the first timer is started by applying RRCReconfiguration associated with a fifth cell, and when the fifth cell is the third serving cell, the first node does not respond to the behavior determination for a radio link failure with the first serving cell; when the fifth cell is not the third serving cell, the first node transmits the first type uplink access signal to the third serving cell.

As a sub-embodiment of the above embodiment, the first timer is started by applying a reconfigurationWithSync associated with a fifth cell, the first node does not respond to the behavior determination for a radio link failure with the first serving cell when the fifth cell is the third serving cell; when the fifth cell is not the third serving cell, the first node transmits the first type uplink access signal to the third serving cell.

As a sub-embodiment of the above embodiment, the first timer is started by applying condrrcconfig associated with a fifth cell, and when the fifth cell is the third serving cell, the first node does not respond to the behavior determination for a radio link failure with the first serving cell; when the fifth cell is not the third serving cell, the first node transmits the first type uplink access signal to the third serving cell.

Example 2

Embodiment 2 illustrates a schematic diagram of a network architecture according to the present application, as shown in fig. 2.

Fig. 2 illustrates a diagram of a network architecture 200 for 5G NR, LTE (Long-Term Evolution), and LTE-a (Long-Term Evolution-enhanced) systems. The 5G NR or LTE network architecture 200 may be referred to as a 5GS (5G System)/EPS (Evolved Packet System) 200 or some other suitable terminology. The 5GS/EPS 200 may include one or more UEs (User Equipment) 201, NG-RANs (next generation radio access networks) 202, 5 GCs (5G Core networks )/EPCs (Evolved Packet cores) 210, HSS (Home Subscriber Server)/UDMs (Unified Data Management) 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, however those skilled in the art will readily appreciate that the various concepts presented throughout this application may be extended to networks providing circuit switched services or other cellular networks. The NG-RAN includes NR node b (gNB)203 and other gnbs 204. The gNB203 provides user and control plane protocol termination towards the UE 201. The gnbs 203 may be connected to other gnbs 204 via an Xn interface (e.g., backhaul). The gNB203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), a TRP (transmitting receiving node), or some other suitable terminology. The gNB203 provides the UE201 with an access point to the 5GC/EPC 210. Examples of the UE201 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a Personal Digital Assistant (PDA), a satellite radio, non-terrestrial base station communications, satellite mobile communications, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, a drone, an aircraft, a narrowband internet of things device, a machine type communication device, a terrestrial vehicle, an automobile, a wearable device, or any other similar functioning device. Those skilled in the art may also refer to UE201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile 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 gNB203 is connected to the 5GC/EPC210 through an S1/NG interface. The 5GC/EPC210 includes MME (Mobility Management Entity)/AMF (Authentication Management domain)/SMF (Session Management Function) 211, other MME/AMF/SMF214, S-GW (serving Gateway)/UPF (User Plane Function) 212, and P-GW (Packet data Network Gateway)/UPF 213. The MME/AMF/SMF211 is a control node that handles signaling between the UE201 and the 5GC/EPC 210. In general, the MME/AMF/SMF211 provides bearer and connection management. All user IP (Internet protocol) packets are transported through the S-GW/UPF212, which S-GW/UPF212 itself is connected to the P-GW/UPF 213. The P-GW provides UE IP address allocation as well as other functions. The P-GW/UPF213 is connected to the internet service 230. The internet service 230 includes an operator-corresponding internet protocol service, and may specifically include the internet, an intranet, an IMS (IP Multimedia Subsystem), and a packet-switched streaming service.

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

As an embodiment, the UE201 supports transmission in a non-terrestrial network (NTN).

As an embodiment, the UE201 supports transmission in a large delay-difference network.

As an embodiment, the UE201 supports V2X transmission.

As an embodiment, the gNB203 corresponds to the first serving cell in this application.

As an embodiment, the gNB203 corresponds to the second serving cell in this application.

As an embodiment, the gNB203 corresponds to the third serving cell in this application.

As an embodiment, the gNB203 corresponds to the fourth serving cell in this application.

As one embodiment, the gNB203 supports transmissions over a non-terrestrial network (NTN).

As an embodiment, the gNB203 supports transmission in large latency difference networks.

As an embodiment, the gNB203 supports V2X transmissions.

Example 3

Embodiment 3 shows a schematic diagram of an embodiment of a radio protocol architecture for the user plane and the control plane according to the present application, as shown in fig. 3. Fig. 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300, fig. 3 showing the radio protocol architecture for the control plane 300 between a first node (UE, satellite or aircraft in a gNB or NTN) and a second node (gNB, satellite or aircraft in a UE or NTN), or two UEs, in three layers: layer 1, layer 2 and layer 3. Layer 1(L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY 301. Layer 2(L2 layer) 305 is above PHY301 and is responsible for the link between the first and second nodes and the two UEs through PHY 301. The L2 layer 305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate at the second node. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security by ciphering data packets and provides handoff support between second nodes to the first node. The RLC sublayer 303 provides segmentation and reassembly of upper layer packets, retransmission of lost packets, and reordering of packets to compensate for out-of-order reception due to HARQ. The MAC sublayer 302 provides multiplexing between logical and transport channels. The MAC sublayer 302 is also responsible for allocating the various radio resources (e.g., resource blocks) in one cell between the first nodes. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in layer 3 (layer L3) in the Control plane 300 is responsible for obtaining Radio resources (i.e., Radio bearers) and configuring the lower layers using RRC signaling between the second node and the first node. The radio protocol architecture of the user plane 350 includes layer 1(L1 layer) and layer 2(L2 layer), the radio protocol architecture in the user plane 350 for the first and second nodes is substantially the same for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355 as the corresponding layers and sublayers in the control plane 300, but the PDCP sublayer 354 also provides header compression for upper layer packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 further includes an SDAP (Service Data Adaptation Protocol) sublayer 356, and the SDAP sublayer 356 is responsible for mapping between QoS streams and Data Radio Bearers (DRBs) to support diversity of services. Although not shown, the first node may have several upper layers above the L2 layer 355. Also included are a network layer (e.g., IP layer) that terminates at the P-GW on the network side and an application layer that terminates at the other end of the connection (e.g., far end UE, server, etc.).

As an example, the wireless protocol architecture in fig. 3 is applicable to the first node in this application.

As an example, the radio protocol architecture in fig. 3 is applicable to the first serving cell in the present application.

As an example, the radio protocol architecture in fig. 3 is applicable to the second serving cell in this application.

As an example, the radio protocol architecture in fig. 3 is applicable to the third serving cell in the present application.

As an example, the radio protocol architecture in fig. 3 is applicable to the fourth serving cell in the present application.

As an embodiment, the first type of uplink access signal in the present application is formed in the PHY301, the MAC302, or the RRC 306.

As an embodiment, the first signaling in this application is generated in the MAC302 or RRC 306.

As an embodiment, the second signaling in this application is generated in the MAC302 or RRC 306.

As an embodiment, the first set of reference signals in this application is generated in the PHY301 or MAC302 or RRC 306.

As an embodiment, the first cell list in the present application is generated in the PHY301, the MAC302, or the RRC 306.

As an embodiment, the second cell list in the present application is generated in the PHY301, the MAC302, or the RRC 306.

Example 4

Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to the present application, as shown in fig. 4. Fig. 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.

The first communications 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.

The second communication device 410 includes a controller/processor 475, a memory 476, a receive processor 470, a transmit processor 416, a multiple antenna receive processor 472, a multiple antenna transmit processor 471, a transmitter/receiver 418, and an antenna 420.

In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper layer data packets from the core network are provided to the controller/processor 475. The controller/processor 475 implements the functionality of layer L2. In transmissions 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 communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). The transmit processor 416 implements coding and interleaving to facilitate Forward Error Correction (FEC) at the second communication device 410, as well as mapping of signal constellation based on various modulation schemes (e.g., Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based precoding and non-codebook based precoding, and beamforming processing on the coded and modulated symbols to generate one or more spatial streams. Transmit processor 416 then maps each spatial stream to subcarriers, multiplexes with reference signals (e.g., pilots) in the time and/or frequency domain, and then uses an Inverse Fast Fourier Transform (IFFT) to generate the physical channels carrying the time-domain multicarrier symbol streams. The multi-antenna transmit processor 471 then performs transmit analog precoding/beamforming operations on the time domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream that is then provided to a different antenna 420.

In a transmission from the second communications apparatus 410 to the first communications apparatus 450, each receiver 454 receives a signal through its respective antenna 452 at the first communications apparatus 450. Each receiver 454 recovers information modulated onto a radio frequency carrier and converts the radio frequency stream into a baseband multi-carrier symbol stream that is provided to a receive processor 456. Receive processor 456 and multi-antenna receive processor 458 implement the various signal processing functions of the L1 layer. A multi-antenna receive processor 458 performs receive analog precoding/beamforming operations on the baseband multi-carrier symbol stream from the receiver 454. Receive processor 456 converts the baseband multicarrier symbol stream after the receive analog precoding/beamforming operation from the time domain to the frequency domain using a Fast Fourier Transform (FFT). In the frequency domain, the physical layer data signals and the reference signals to be used for channel estimation are demultiplexed by the receive processor 456, and the data signals are subjected to 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 at a 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 communications device 410 on the physical channel. The upper layer data and control signals are then provided to a controller/processor 459. The controller/processor 459 implements the functionality of the L2 layer. The controller/processor 459 may be associated with a memory 460 that stores program codes and data. Memory 460 may be referred to as a computer-readable medium. In transmissions from the second communications device 410 to the second communications device 450, the controller/processor 459 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer packets from the core network. The upper layer packet is then provided to all protocol layers above the L2 layer. Various control signals may also be provided to L3 for L3 processing.

In a transmission from the first communications device 450 to the second communications device 410, a data source 467 is used at the first communications device 450 to provide upper layer data packets to a controller/processor 459. Data source 467 represents all protocol layers above the L2 layer. Similar to the send function at the second communications apparatus 410 described in the transmission from the second communications apparatus 410 to the first communications apparatus 450, the controller/processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocation, implementing L2 layer functions for the user plane and control plane. The controller/processor 459 is also responsible for retransmission of lost packets and signaling to said second communications device 410. A transmit processor 468 performs modulation mapping, channel coding, and digital multi-antenna spatial precoding by a multi-antenna transmit processor 457 including codebook-based precoding and non-codebook based precoding, and beamforming, and the transmit processor 468 then modulates the resulting spatial streams into multi-carrier/single-carrier symbol streams, which are provided to different antennas 452 via a transmitter 454 after analog precoding/beamforming in the multi-antenna transmit processor 457. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency symbol stream and provides the radio frequency symbol stream to the antenna 452.

In a 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 receiving functionality at the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives an rf signal through its respective antenna 420, converts the received rf signal to a baseband signal, and provides the baseband signal to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multiple antenna receive processor 472 collectively implement the functionality of the L1 layer. Controller/processor 475 implements the L2 layer functions. The controller/processor 475 can be associated with a memory 476 that stores program codes and data. Memory 476 may be referred to as a computer-readable medium. In transmission from the first communications device 450 to the second communications device 410, the controller/processor 475 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer packets from the UE 450. Upper layer data packets from the controller/processor 475 may be provided to a core network.

As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code configured to, for use with the at least one processor, the first communication device 450 apparatus at least: determining a radio link failure with a first serving cell; when the first timer is in a stop state, as a response of determining that a radio link between the first serving cell and the second serving cell fails, selecting a second serving cell, starting the first timer, and sending a first type uplink access signal for the second serving cell; when the first timer is in a running state, sending a first type uplink access signal aiming at a third service cell; wherein the first type of uplink access signal is used to determine that the RRC connection is complete.

As an embodiment, the first communication device 450 includes: a memory storing a program of computer readable instructions that when executed by at least one processor result in actions comprising: determining a radio link failure with a first serving cell; when the first timer is in a stop state, as a response of determining that a radio link between the first serving cell and the second serving cell fails, selecting a second serving cell, starting the first timer, and sending a first type uplink access signal for the second serving cell; when the first timer is in a running state, sending a first type uplink access signal aiming at a third service cell; wherein the first type of uplink access signal is used to determine that the RRC connection is complete.

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

As an embodiment, the second communication device 410 corresponds to a first serving cell in the present application.

As an embodiment, the second communication device 410 corresponds to a second serving cell in the present application.

As an embodiment, the second communication device 410 corresponds to a third serving cell in the present application.

As an embodiment, the second communication device 410 corresponds to a fourth serving cell in this application.

For one embodiment, the first communication device 450 is a UE.

As an embodiment, the first communication device 450 is a vehicle-mounted terminal.

For one embodiment, the second communication device 410 is a base station.

For one embodiment, the second communication device 410 is a UE.

For one embodiment, the second communication device 410 is a satellite.

For one embodiment, receiver 456 (including antenna 460), receive processor 452, and controller/processor 490 are used to receive the first signaling.

For one embodiment, receiver 456 (including antenna 460), receive processor 452, and controller/processor 490 are used to receive the second signaling.

For one embodiment, receiver 456 (including antenna 460), receive processor 452, and controller/processor 490 are used to receive the first set of reference signals.

For one embodiment, receiver 456 (including antenna 460), receive processor 452, and controller/processor 490 are configured to receive the first candidate cell list as described herein.

For one embodiment, receiver 456 (including antenna 460), receive processor 452, and controller/processor 490 are configured to receive the second candidate cell list as described herein.

For one embodiment, a transmitter 456 (including an antenna 460), a transmit processor 455, and a controller/processor 490 are used to transmit the first type of uplink access signals in this application.

Example 5

Embodiment 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in fig. 5. In fig. 5, U01 corresponds to the first node of the present application, N02 corresponds to the second serving cell of the present application, and N03 corresponds to the third serving cell of the present application, and it is specifically noted that the sequence in the present example does not limit the sequence of signal transmission and the sequence of implementation in the present application.

For theFirst node U01Determining that a radio link with the first serving cell fails in step S5101; in step S5102, it is judged that the operation state of the first timer is a stopped state (not running)Or running state (running); selecting the second serving cell and starting the first timer in step S5103; in step S5104, the first type of uplink access signal is transmitted, and in step S5105, the first type of uplink access signal is transmitted.

For theSecond serving cell N02In step S5201, the first type of uplink access signal is received.

For theThird serving cell N03In step S5301, the first type uplink access signal is received.

In embodiment 5, when the first node is in a stopped state, the first node selects the second serving cell in response to the determination that the radio link with the first serving cell has failed, starts the first timer, and transmits the first type uplink access signal for the second serving cell N02; when the first timer is in a running state, sending the first type uplink access signal aiming at the third serving cell N03; wherein the first type of uplink access signal is used to determine that the RRC connection is complete.

As an embodiment, the first serving cell is the SCG of the first node U01.

As an embodiment, the first serving cell is a cell in the SCG of the first node U01.

As one embodiment, the first serving cell is a PSCell of the first node U01.

As an embodiment, the third serving cell N03 is a cell other than the second serving cell N02.

As an embodiment, the third serving cell N03 is a target cell for the first node U01.

As an embodiment, the third serving cell N03 is a target cell of the first node U01 to perform handover.

As an embodiment, the third serving Cell N03 is determined to be a new MCG (Master Cell Group) of the first node U01.

As an embodiment, the third serving cell N03 is determined to be a new PCell of the node U01.

As an embodiment, the third serving cell N03 is determined to be the new SPCell of the node U01.

As an embodiment, the first node U01 applies condrrcconfig associated with the third serving cell N03.

As one embodiment, the first node U01 has determined a radio link failure with the MCG of the first node U01 prior to the behavior determining a radio link failure with the first serving cell.

As an embodiment, the first type of uplink access signal includes a rrcreeconfigurationcomplete message.

As an embodiment, the first type uplink access signal includes an rrcconnectionreconfiguration complete message.

For one embodiment, the first timer includes T304.

As an embodiment, the configuration of the first timer is configured by the serving cell of the first node U01 through RRC signaling.

As an embodiment, the configuration of the first timer is configured by the serving cell of the first node U01 in a broadcast manner.

As a sub-embodiment of this embodiment, the manner of broadcasting includes receiving a SIB for the serving cell.

As a sub-embodiment of this embodiment, the manner of broadcasting includes receiving the SIB1 of the serving cell.

As an embodiment, the configuration of the first timer is configured by the serving cell of the first node U01 in a unicast manner.

As a sub-embodiment of this embodiment, the unicast manner includes receiving rrcreconfigurable signaling.

As a sub-embodiment of this embodiment, the unicast manner includes receiving RRCConnectionReconfiguration signaling.

As a sub-embodiment of this embodiment, the unicast manner includes receiving the RRCSetup signaling.

As a sub-embodiment of this embodiment, the unicast manner includes receiving RRCConnectionSetup signaling.

As a sub-embodiment of this embodiment, the unicast manner includes receiving rrcreestablistering signaling.

As a sub-embodiment of this embodiment, the unicast manner includes receiving RRCConnectionReestablishment signaling.

As a sub-embodiment of this embodiment, the unicast manner includes receiving RRCResume signaling.

As a sub-embodiment of this embodiment, the unicast manner includes receiving rrcconnectionresponse signaling.

As an embodiment, the act of "selecting a second serving cell" comprises: determining the second serving cell during a cell selection or reselection procedure.

As an embodiment, the act of "selecting a second serving cell" comprises: and determining the second serving cell as a target cell of link reconstruction (Re-estimation).

For one embodiment, the first timer is timer T304.

As an embodiment, the second timer is related to the selected second serving cell.

As an embodiment, the second timer is related to whether the selected second serving cell belongs to a first candidate set of cells.

As an embodiment, whether the second timer is timer T304 relates to whether the selected second serving cell belongs to the first candidate set of cells.

As an embodiment, the act of "selecting a second serving cell" comprises: applying a controlRRCREConfig associated with the second serving cell if the second serving cell is one of the first set of candidate cells whose recordingWithSync is included within a mapRCLCELgroup in a VarCondtionalConfig.

As a sub-embodiment of the one or more embodiments, the second timer is timer T304.

As an embodiment, the act of "selecting a second serving cell" comprises: the second serving cell is a cell other than the first candidate cell set, and the reconfigurationWithSync of the first candidate cell set is included in a masterCellGroup in the varconsistomeconfig.

As a sub-embodiment of the one or more embodiments, the second timer is timer T311.

As an embodiment, the act of "selecting a second serving cell" comprises: the timer T310 is stopped if the timer T310 is running.

As an embodiment, the act of "selecting a second serving cell" comprises: the timer T312 is stopped if the timer T312 is running.

As an embodiment, the act of "selecting a second serving cell" comprises: the timer T304 is stopped if the timer T304 is running.

As an embodiment, the act of "selecting a second serving cell" comprises: the timer T316 is stopped if the timer T316 is running.

As an embodiment, the act of "selecting a second serving cell" comprises: t311 is started.

As an embodiment, the act of "selecting a second serving cell" comprises: releasing the SCell of the MCG if the MCG is configured with the SCell.

As an embodiment, the act of "selecting a second serving cell" comprises: if MR-DC (Multi-RAT Dual Connectivity, Multi-Access technology, Dual Connectivity) is configured, the MR-DC is released.

As an embodiment, the first type of uplink access signal includes rrcreconfigurable complete.

As an embodiment, the first type of uplink access signal includes rrcreestablishrequest.

For an embodiment, the first type of uplink access signal includes rrcconnectionreestablishinrequest.

As an embodiment, the first type of uplink access signal includes rrcreestablshmentcomplete.

For an embodiment, the first type of uplink access signal includes rrcconnectionreestablishingcomplete.

Example 6

Embodiment 6 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in fig. 6. In fig. 6, U11 corresponds to the first node of the present application, N12 corresponds to the fourth serving cell of the present application, and N13 corresponds to the third serving cell of the present application, and it is specifically noted that the sequence in the present example does not limit the sequence of signal transmission and the sequence of implementation in the present application.

For theFirst node U11Receiving a first signaling in step S6101; receiving a first set of reference signals in step S6102; determining whether a first trigger condition is satisfied in step S6103; in step S6104, a first timer is started; it is determined in step S6105 that the radio link with the first serving cell fails.

For theFourth serving cell N12In step S6201, the first signaling is sent.

For theThird serving cell N13The first set of reference signals is transmitted in step S6301.

As an embodiment, the fourth serving cell is an MCG of the first node U11.

As an embodiment, the fourth serving cell is a cell in an MCG of the first node U11.

As an embodiment, the fourth serving cell is a PCell of the first node U11.

As an embodiment, the fourth serving cell is an SPCell of the first node U11.

As an embodiment, the third serving cell N13 is a cell other than the second serving cell.

As an embodiment, the third serving cell N13 is a target cell for the first node U11.

As an embodiment, the third serving cell N13 is a target cell of the first node U11 to perform handover.

As an embodiment, the third serving Cell N13 is determined to be a new MCG (Master Cell Group) of the first node U11.

As an embodiment, the third serving cell N13 is determined to be a new PCell of the first node U11.

As an embodiment, the third serving cell N13 is determined to be the new SPCell of the first node U11.

As an embodiment, the first node U11 applies condrrcconfig associated with the third serving cell N13.

As an embodiment, the first node U11 has determined a radio link failure with the fourth serving cell before the behavior determines a radio link failure with the first serving cell.

As one embodiment, the first signaling indicates the first set of reference signals.

For one embodiment, the first set of reference signals includes SSBs.

For one embodiment, the first set of reference signals includes an SS/PBCH.

As one embodiment, the first set of Reference signals includes CRS (Cell Reference Signal).

For one embodiment, the first set of Reference signals includes CSI-RS (Channel State Information-Reference Signal).

As one embodiment, the first signaling comprises RRC signaling.

As one embodiment, the first signaling includes a MAC CE.

As one embodiment, the first signaling comprises higher layer signaling.

As an embodiment, the downlink physical channel occupied by the first signaling includes a PDSCH.

As an embodiment, the first signaling comprises rrcreeconfiguration.

As an embodiment, the first signaling comprises RRCConnectionReconfiguration.

As an embodiment, the first signaling comprises ReportConfigNR.

For one embodiment, the first signaling comprises CondTiggerConfig-r 16.

As one embodiment, the first signaling comprises a condconfonfigtoaddmodlist.

As an embodiment, the first signaling comprises condcffigtoremovelist-r 16.

For one embodiment, the first signaling includes attemptcondereconfig-r 16.

As an embodiment, the first signaling comprises a CondConfigId.

As an embodiment, the first signaling comprises a conditional reconfiguration.

As an embodiment, the first signaling comprises conditional reconfiguration-r 16.

For one embodiment, the first signaling includes condRRCREConfig-r 16.

For one embodiment, the first signaling includes condExecutionCond-r 16.

As an embodiment, the first signaling includes a physical cell id (phycellid) of the third serving cell N13.

As one embodiment, the first signaling includes a frequency (ssbfequency) of the first set of reference signals.

As one embodiment, the first signaling includes a subcarrier spacing (ssbsubcorrierspacing) of the first set of reference signals.

As an embodiment, the first signaling comprises a configuration of the first set of reference signals (referrence signaling config).

As an embodiment, the first set of reference signals is associated with a physical cell identity of the third serving cell N13.

As an embodiment, the first set of reference signals is scrambled using a physical cell identity of the third serving cell N13.

As an embodiment, the first reference signal set and the physical cell identity of the third serving cell N13 have a corresponding relationship.

As an embodiment, the physical cell identity of the third serving cell N13 is determined by the first set of reference signals.

As an embodiment, the cell identity of the third serving cell N13 is used to generate the first scrambling sequence used to scramble the first random access signal.

As an embodiment, the first signaling indicates the first trigger condition.

As an embodiment, the first signaling explicitly indicates the first trigger condition.

As an embodiment, the first trigger condition is used to trigger a handover.

As one embodiment, the first trigger condition is used for triggering Conditional Handover (CHO).

For one embodiment, the first trigger condition includes CondTiggerConfig-r 16.

As one embodiment, the first trigger condition includes a time-based trigger.

For one embodiment, the first trigger condition includes a trigger based on a geographic location of the first node U11.

For one embodiment, the first trigger condition comprises an event-based trigger.

For one embodiment, the first trigger condition comprises a trigger based on an a3 event.

For one embodiment, the first trigger condition comprises a trigger based on an a5 event.

For one embodiment, the first trigger condition comprises a trigger based on A3 and A5 events.

For one embodiment, the first trigger condition includes a trigger based on a condEventA3 event.

For one embodiment, the first trigger condition includes a trigger based on a condEventA5 event.

For one embodiment, the first trigger condition includes a trigger based on condEventA3 and condEventA5 events.

As one embodiment, the first signaling indicates a measurement configuration for the first set of reference signals.

As an embodiment, the first signaling indicates a measurement configuration for the first set of reference signals, the measurement configuration being used to configure the first channel measurements.

For one embodiment, the first node U11 performs a first channel measurement for the first set of reference signals.

As an embodiment, the first node U11 performs first channel measurements for the first set of reference signals according to the measurement configuration indicated by the first signaling.

As one embodiment, the first trigger condition includes that a result of the first channel measurement of the first set of reference signals satisfies a threshold.

As a sub-embodiment of this embodiment, when the result of the first channel measurement is RSRP (Reference Signal Receiving Power), the certain threshold is an RSRP threshold.

As a sub-embodiment of this embodiment, when the result of the first channel measurement is RSRQ (Reference Signal Receiving Quality), the certain threshold is an RSRQ threshold.

As a sub-embodiment of this embodiment, when the result of the first channel measurement is SNR (signal Noise ratio), the certain threshold is an SNR threshold.

As a sub-embodiment of this embodiment, when the result of the first channel measurement is RSSI (Received Signal Strength Indication), the certain threshold is an RSSI threshold.

As a sub-embodiment of this embodiment, the sentence "the result of the first channel measurement satisfies a certain threshold" includes: the result of the first channel measurement satisfies the requirement of hystersis.

As a sub-embodiment of this embodiment, the sentence "the result of the first channel measurement satisfies a certain threshold" includes: the result of the first channel measurement meets the requirement of TimeToTrigger.

As an embodiment, the sentence "the operation state of the first timer is started in response to the result of the first channel measurement satisfying the first trigger condition" includes the following meanings: the first timer is started when the result of the first channel measurement satisfies the first trigger condition.

As an embodiment, the sentence "the operation state of the first timer is started in response to the result of the first channel measurement satisfying the first trigger condition" includes the following meanings: when the result of the first channel measurement satisfies the first trigger condition, the first timer becomes a running state.

As an embodiment, the sentence "the operation state of the first timer is started in response to the result of the first channel measurement satisfying the first trigger condition" includes the following meanings: when the result of the first channel measurement satisfies the first trigger condition, the first node U11 selects the third serving cell N13 as a target cell, and performs handover.

As an embodiment, the sentence "the operation state of the first timer is started in response to the result of the first channel measurement satisfying the first trigger condition" includes the following meanings: when the result of the first channel measurement satisfies the first trigger condition, the first node U11 selects the third serving cell N13 as a target cell, and performs a conditional handover.

It should be noted that the operation state of the first timer is started "includes the following meaning: when the result of the first channel measurement satisfies the first trigger condition, the first node U11 selects the third serving cell N13 as a target cell, and performs a conditional reconfiguration.

As an embodiment, the sentence "the operation state of the first timer is started in response to the result of the first channel measurement satisfying the first trigger condition" includes the following meanings: when the result of the first channel measurement satisfies the first trigger condition, the first node U11 applies condrrcconfig associated with the third serving cell N13.

As an embodiment, the sentence "the operation state of the first timer is started in response to the result of the first channel measurement satisfying the first trigger condition" includes the following meanings: when the result of the first channel measurement satisfies the first trigger condition, the first node U11 applies a recognitionalthsync associated with the third serving cell N13.

As an embodiment, the sentence "the operation state of the first timer is started in response to the result of the first channel measurement satisfying the first trigger condition" includes the following meanings: when the result of the first channel measurement satisfies the first trigger condition, the first node U11 sets the third serving cell N13 to MCG.

As an embodiment, the sentence "the operation state of the first timer is started in response to the result of the first channel measurement satisfying the first trigger condition" includes the following meanings: when the result of the first channel measurement satisfies the first trigger condition, the first node U11 sets the third serving cell N13 as PCell.

As an embodiment, the sentence "the operation state of the first timer is started in response to the result of the first channel measurement satisfying the first trigger condition" includes the following meanings: when the result of the first channel measurement satisfies the first trigger condition, the first node U11 sets the third serving cell N13 as the SPCell.

As an embodiment, the sentence "the operation state of the first timer is started in response to the result of the first channel measurement satisfying the first trigger condition" includes the following meanings: when the result of the first channel measurement satisfies the first trigger condition, the first node U11 transmits a random access signal to the third serving cell N13.

As an embodiment, the sentence "the operation state of the first timer is started in response to the result of the first channel measurement satisfying the first trigger condition" includes the following meanings: when the result of the first channel measurement satisfies the first trigger condition, the first node U11 remains synchronized with the third serving cell N13.

As an embodiment, the action "determining the radio link failure with the first serving cell" in step S6105 occurs after the start of the first timer in said step S6104.

As an example, the action "determining the radio link failure with the first serving cell" in step S6105 occurs before the start of the first timer in said step S6104.

As an embodiment, the fourth serving cell N12 and the first serving cell belong to an MCG and an SCG, respectively.

As an embodiment, the fourth serving cell N12 and the first serving cell are maintained by two gnbs, respectively.

As an example, the backhaul (backhaul) between the fourth serving cell N12 and the first serving cell is non-ideal (i.e., the delay cannot be neglected).

As an embodiment, the fourth serving cell N12 and the first serving cell are connected through an X2 interface.

As an embodiment, the fourth serving cell N12 and the first serving cell are connected through an Xn interface.

As an embodiment, the fourth serving cell N12 and the first serving cell are a PCell and a PSCell, respectively.

Example 7

Embodiment 7 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in fig. 7. In fig. 7, U21 corresponds to the first node of the present application, N22 corresponds to the first serving cell of the present application, and N23 corresponds to the third serving cell of the present application, and it is specifically noted that the sequence in the present example does not limit the sequence of signal transmission and the sequence of implementation in the present application. Wherein the steps within F71 and F72 are optional.

For theFirst node U21Determining that a radio link with the fourth serving cell fails in step S7101; transmitting a first failure-related message in step S7102; receiving a second signaling in step S7103; a second meter is started in step S7104A timer for determining a radio link failure with the first serving cell in step S7105; in step S7106, a first type uplink access signal is transmitted.

For theFirst serving cell N22Receiving the first failure-related message in step S7201; the second signaling is sent in step S7202.

For theThird serving cell N23In step S7301, the first type uplink access signal is received.

As one embodiment, the second timer is the first timer.

For one embodiment, the first timer is timer T304.

As one embodiment, the first timer is T304 associated with the MCG.

In embodiment 7, the first timer is in a running state, and the first node U21 sends the first type uplink access signal for the third serving cell N03; wherein the first type of uplink access signal is used to determine that the RRC connection is complete.

As an embodiment, the first serving cell is the SCG of the first node U21.

As an embodiment, the first serving cell is a cell in the SCG of the first node U21.

As one embodiment, the first serving cell is a PSCell of the first node U21.

As an embodiment, the third serving cell N23 is a target cell for the first node U21.

As an embodiment, the third serving cell N23 is a target cell of the first node U21 to perform handover.

As an embodiment, the third serving Cell N23 is determined to be a new MCG (Master Cell Group) of the first node U21.

As an embodiment, the third serving cell N23 is determined to be a new PCell of the node U21.

As an embodiment, the third serving cell N23 is determined to be the new SPCell of the node U21.

As an embodiment, the fourth serving cell is an MCG of the first node U21.

As an embodiment, the fourth serving cell is a cell in an MCG of the first node U21.

As an embodiment, the fourth serving cell is a PCell of the first node U21.

As an embodiment, the fourth serving cell is an SPCell of the first node U21.

As an embodiment, the sentence "determining a radio link failure with a fourth serving cell" includes: detecting an out-of-synchronization (out-of-sync) of the fourth serving cell and continuing until a first time.

As a sub-embodiment of this embodiment, the first time is equal to the expiration time of the timer T310 of the fourth serving cell.

As a sub-embodiment of this embodiment, the first time is equal to the expiration time of the timer T312 of the fourth serving cell.

As an embodiment, the sentence "determining a radio link failure with a fourth serving cell" includes, as an embodiment: detecting that a problem occurs with random access initiated for the fourth serving cell and that none of timer T300, timer T301, timer T304, timer T311 and timer T319 are running.

As an embodiment, the sentence "determining a radio link failure with a fourth serving cell" includes: receiving an indication of the Radio Link Control (RLC) of the fourth serving cell regarding the maximum number of retransmissions.

As an embodiment, the sentence "determining a radio link failure with a fourth serving cell" includes: if connected as an IAB (Integrated Access and Backhaul) node, the radio link with the fourth serving cell is considered to fail when receiving a BH RLF indication from a BAP (Backhaul Access Protocol) entity of the MCG.

As an embodiment, the sentence "determining a radio link failure with a fourth serving cell" includes: the reception of the persistent uplink lbt (listen Before talk) from the MCG MAC fails and the radio link with the fourth serving cell is considered to fail.

As an embodiment, the sentence "determining a radio link failure with a fourth serving cell" includes: detecting a re-configuration with sync failure (re-configuration with sync) for the fourth serving cell.

As a sub-embodiment of this embodiment, the first node detects the synchronization reconfiguration failure for the fourth serving cell by Monitoring (Monitoring) timer T304 for expiration.

As a sub-embodiment of this embodiment, the first node detects that the synchronization reconfiguration for the fourth serving cell fails through compatibility to composition with rrcrconfiguration (integrity to compatibility).

As an embodiment, the sentence "determining a radio link failure with a fourth serving cell" includes: an RRC connection re-establishment (rrcreestablishing) procedure failure is detected.

As an embodiment, the sentence "determining a radio link failure with a fourth serving cell" includes: radio Link Failure (RLF) is detected.

For one embodiment, the first node U21 determines that the radio link with the fourth serving cell failed by the expiration of T310 associated with the fourth serving cell.

As an embodiment, the fourth serving cell configures the T310 through RRC signaling.

As an embodiment, the U21 primary serving cell (PCell) of the first node configures the timer through RRC signaling.

As an embodiment, the primary serving cell (PCell) of the first node U21 configures the timer T310 through RRC signaling.

For one embodiment, the first node U21 determines that the radio link with the fourth serving cell failed by the expiration of T312 associated with the fourth serving cell.

As an embodiment, the fourth serving cell configures the T312 through RRC signaling.

As an embodiment, the primary serving cell (PCell) of the first node U21 configures the timer T312 through RRC signaling.

As an embodiment, the sentence "determining a radio link failure with a fourth serving cell" includes: a Handover (HO) Failure (Failure) is detected.

As an embodiment, the first failure related message includes MCGFailureInformation.

As an embodiment, the first failure related message comprises SCGFailureInformation.

As an embodiment, the first failure-related message comprises a ULInformationTransferMRDC.

As an embodiment, the second signaling sent in step S7202 is a response to receiving the first failure related message in step S7201.

As an embodiment, the response of the first failure related message in step S7201 triggers the sending of the second signaling in step S7202.

As an embodiment, the second signaling comprises RRC signaling.

As an embodiment, the second signaling includes a MAC CE.

As one embodiment, the second signaling includes DCI.

As an embodiment, the second signaling comprises higher layer signaling.

As an embodiment, the second signaling comprises rrcreeconfiguration.

As an embodiment, the second signaling comprises RRCConnectionReconfiguration.

As one embodiment, the second signaling includes rrcreelease.

As an embodiment, the second signaling comprises RRCConnectionRelease.

As an embodiment, the Downlink physical channel occupied by the second signaling includes a pdsch (physical Downlink Shared channel).

As an embodiment, the Downlink physical channel occupied by the second signaling includes a pdcch (physical Downlink Control channel).

As an embodiment, the second signaling instructs the first node U21 to handover to the third serving cell.

As an embodiment, the second signaling instructs the first node U21 to apply spCellConfig associated with the third serving cell.

As an embodiment, in response to receiving the second signaling, the first node U21 sends the first type uplink access signal to a third serving cell.

As an embodiment, the receiving of the second signaling is a trigger condition for sending the first type uplink access signal.

Example 8

Embodiment 8 illustrates a wireless signal transmission flow diagram according to an embodiment of the present application, as shown in fig. 8. In fig. 8, U31 corresponds to the first node of the present application, N32 corresponds to the second serving cell of the present application, and N33 corresponds to the third serving cell of the present application, and it is specifically noted that the sequence in the present example does not limit the sequence of signal transmission and the sequence of implementation in the present application. Wherein the steps within F81 and F82 are optional.

For theFirst node U31Determining a radio link failure with the first serving cell in step S8101; sending a first type uplink access signal in step S8102; starting a second timer in step S8103; determining that a radio link with a first serving cell fails in step S8104, and transmitting a first type uplink access signal in step S8105; the first timer is restarted in step S8106.

For theSecond serving cell N32In step S8201, the first type of uplink access signal is received.

For theThird serving cell N33In step S8301, the first type uplink access signal is received.

As one embodiment, the second timer is the first timer.

As one example, the first timer is timer T316.

In embodiment 8, when the first timer is in a stopped state, selecting the second serving cell in response to the determination that the radio link with the first serving cell has failed, starting the second timer, and transmitting the first type uplink access signal for the second serving cell; when the first timer is in a running state, sending the first type uplink access signal aiming at the third serving cell; wherein the first type of uplink access signal is used to determine that the RRC connection is complete.

As an embodiment, the first serving cell is an MCG of the first node U31.

As an embodiment, the first serving cell is a cell in an MCG of the first node U31.

As an embodiment, the first serving cell is a PCell of the first node U31.

As one embodiment, the first serving cell is an SPCell of the first node U31.

As an embodiment, the second serving cell N33 is the SCG of the first node U31.

As an embodiment, the second serving cell N33 is a cell in the SCG of the first node U31.

As an embodiment, the second serving cell N33 is the PSCell of the first node U31.

As an embodiment, the third serving cell N33 is the SCG of the first node U31.

As an embodiment, the third serving cell N33 is a cell in the SCG of the first node U31.

As an embodiment, the third serving cell N33 is the PSCell of the first node U31.

As an embodiment, the second serving cell N32 and the third serving cell N33 belong to the same SCG of the first node U31.

As an embodiment, the second serving cell N32 and the third serving cell N33 belong to different SCGs of the first node U31.

As an embodiment, the second serving cell N32 and the third serving cell N33 are pscells in different SCGs of the first node U31, respectively.

As an embodiment, the first type of uplink access signal includes MCGFailureInformation.

As an embodiment, the first type of uplink access signal includes SCGFailureInformation.

As an embodiment, the first type of uplink access signal comprises ULInformationTransferMRDC.

As an example, the access stratum security of the first node U31 has been activated.

As an embodiment, the sentence "determining a radio link failure with a first serving cell" includes: receiving an indication that a maximum number of retransmissions of an RLC (Radio Link Control) of the first serving cell is reached.

As an embodiment, the sentence "determining a radio link failure with a first serving cell" includes: if connected as an IAB (Integrated Access and Backhaul) node, the radio link with the first serving cell is considered to fail when receiving a BH RLF indication from a BAP (Backhaul Access Protocol) entity of the MCG.

As an embodiment, the sentence "determining a radio link failure with a first serving cell" includes: the reception of the persistent uplink lbt (listen Before talk) from the MCG MAC fails and the radio link with the first serving cell is considered to fail.

As an embodiment, the sentence "determining a radio link failure with a first serving cell" includes: detecting a Radio Link Failure (RLF) of the first serving cell.

For one embodiment, the first node U31 determines that the radio link with the first serving cell failed by the expiration of the T310 associated with the first serving cell.

As an embodiment, the primary serving cell (PCell) of the first node U31 configures the timer through RRC signaling.

As an embodiment, the primary serving cell (PCell) of the first node U31 configures the timer T310 through RRC signaling.

As an embodiment, the primary serving cell (PCell) of the first node U31 configures the timer T312 through RRC signaling.

For one embodiment, the first node U31 determines that the radio link with the first serving cell failed by the expiration of the T312 associated with the first serving cell.

As an embodiment, the first node U31 selects the PSCell in the SCG as the second serving cell N32.

As an embodiment, the first node U31 selects a PSCell in any SCG as the second serving cell N32.

As an embodiment, the first node U31 selects any one cell in any one SCG as the second serving cell N32.

As an embodiment, the first node U31 randomly selects any one cell in any one SCG as the second serving cell N32.

As an embodiment, the first node U31 confirms a radio link failure with the first serving cell in step S8104.

As an embodiment, the first node U31 acknowledges the radio link failure with the first serving cell in step S8104, and no feedback of the second serving cell N32 is received before the behavior acknowledges the radio link failure with the first serving cell.

As an embodiment, the first node U31, after step S8102 and before confirming the radio link failure with the first serving cell in step S8104, did not receive feedback from the second serving cell N32.

As an embodiment, the first node U31, after step S8102 and before confirming the radio link failure with the first serving cell in step S8104, does not receive the rrcrconfiguration message from the second serving cell N32.

As an embodiment, the first node U31, after step S8102 and before confirming the radio link failure with the first serving cell in step S8104, does not receive the RRCConnectionReconfiguration message from the second serving cell N32.

As an embodiment, the first node U31, after step S8102 and before confirming the radio link failure with the first serving cell in step S8104, does not receive the RRCRelease message from the second serving cell N32.

As an embodiment, the first node U31, after step S8102 and before confirming the radio link failure with the first serving cell in step S8104, does not receive the RRCConnectionRelease message from the second serving cell N32.

As an embodiment, in response to confirming the radio link failure with the first serving cell in step S8104, the first node U31 selects a third serving cell to transmit the first type uplink access signal in step S8105, and the first node U31 selects a different cell from the second serving cell N32 among all pscells as the third serving cell N33.

As an embodiment, in response to confirming the radio link failure with the first serving cell in step S8104, the first node U31 selects a third serving cell to transmit the first type uplink access signal in step S8105, and the first node U31 selects a cell different from the second serving cell N32 in the SCG as the third serving cell N33.

As an embodiment, the first node U31 restarts the first timer in step S8106 using the same configuration.

As an embodiment, the first node U31 restarts the first timer in step S8106 using a different configuration.

Example 9

Embodiment 9 is a schematic diagram illustrating that the uplink access signals of the first type are used to determine the completion of RRC connection according to an embodiment of the present application, as shown in fig. 9.

As an embodiment, the signaling rrcreeconfigurationcomplete is used to indicate RRC connection completion to the serving cell of the first node.

As an embodiment, the signaling rrcconnectionreconfiguration complete is used to indicate RRC connection completion to the serving cell of the first node.

As an embodiment, the first type of uplink access signal is a first RRC signaling after RRC connection is completed.

As an embodiment, the receiver of the first type uplink access signal is a target cell for handover, the first type uplink access signal is sent by using SRB1, and signaling is sent by using SRB1 to indicate that the RRC connection is completed.

As an embodiment, the first type of uplink access signal includes RRC signaling, and as a precondition for transmitting the first type of uplink access signal, the first node needs to establish an RRC connection with a receiver of the first type of uplink access signal, where the RRC connection is already established when the first type of uplink access signal can be transmitted, and the transmission of the first type of uplink access signal indicates that the RRC connection is completed.

As an embodiment, the signaling rrcreestablshmentcomplete or RRCConnectionReestablishmentComplete is used to resume RRC connection.

As an embodiment, the signaling rrcreestablistering complete or rrcconnectionreessadiabmentcomplete indicates that the re-establishment of the RRC connection has been completed.

As an embodiment, the first type of uplink access signal includes MCGFailureInformation, and a receiver of the first type of uplink access signal is an SCG of the first node; the signaling MCGFailureInformation is used to trigger the SCG of the first node to send RRCReconfiguration signaling, the RRCReconfiguration signaling is used to trigger the first node to send RRCReconfiguration complete, and the sending of the signaling RRCReconfiguration complete is used to determine RRC connection completion.

As an embodiment, the first type of uplink access signal includes MCGFailureInformation, and a receiver of the first type of uplink access signal is an SCG of the first node; the signaling MCGFailureInformation is used to trigger the SCG of the first node to send RRCConnectionReconfiguration signaling used to trigger the first node to send RRCConnectionReconfiguration complete, the sending of the signaling RRCConnectionReconfiguration complete being used to determine RRC connection completion.

As an embodiment, the first type of uplink access signal includes rrcreconfigurable complete, the signaling rrcreconfigurable complete is triggered by rrcreconfigurable signaling, the signaling rrcreconfigurable complete is used to instruct the first node to handover to a target cell, the behavior handover to the target cell requires RRC connection establishment, and when RRC connection establishment is completed, the first type of uplink access signal is sent, and the signaling rrcreconfigurable complete is used to determine that RRC connection is completed.

As an embodiment, the first type of uplink access signal includes RRCConnectionReconfiguration complete, the signaling RRCConnectionReconfiguration complete is triggered by RRCConnectionReconfiguration signaling, the signaling RRCConnectionReconfiguration is used to instruct the first node to handover to a target cell, the behavior handover to the target cell requires RRC connection establishment, and when RRC connection establishment is completed, the first type of uplink access signal is sent, the signaling RRCConnectionReconfiguration complete is used to determine that the RRC connection is completed.

Example 10

Embodiment 10 illustrates a schematic diagram of a first candidate cell list indicating candidate cells that can be selected when a first timer is in an operating state according to an embodiment of the present application, as shown in fig. 10.

As an embodiment, when the first timer is in a running state, the first node selects a cell in the first candidate cell list as the third serving cell.

As an embodiment, when the first timer is in a running state, the first node randomly selects a cell in the first candidate cell list as the third serving cell.

As an embodiment, when the first timer is in a running state, the first node selects a cell with the best channel quality in the first candidate cell list as the third serving cell.

As an embodiment, the first candidate cell list is sent by higher layer signaling.

As an embodiment, the first candidate cell list is sent by RRC signaling.

As an embodiment, the first candidate cell list is transmitted by a MAC CE.

As an embodiment, the first candidate cell list is transmitted by broadcasting.

As a sub-embodiment of the above embodiment, the broadcast manner includes SIB.

As a sub-embodiment of the above embodiment, the manner of broadcasting includes SIB 1.

As a sub-embodiment of the above embodiment, the manner of broadcasting includes SIB 2.

As a sub-embodiment of the above embodiment, the manner of broadcasting includes SIB 3.

As a sub-embodiment of the above embodiment, the manner of broadcasting includes SIB 4.

As a sub-embodiment of the above embodiment, the manner of broadcasting includes SIB 5.

As a sub-embodiment of the above embodiment, the manner of broadcasting includes SIB 11.

As an embodiment, the first candidate cell list is sent by means of unicast.

As a sub-embodiment of the above embodiment, the unicast transmission mode includes using rrcreeconfiguration signaling transmission.

As a sub-embodiment of the above embodiment, the unicast transmission mode includes using RRCConnectionReconfiguration signaling transmission.

As a sub-embodiment of the above embodiment, the unicast transmission mode includes DCI signaling transmission.

As a sub-embodiment of the above embodiment, the unicast transmission mode includes transmission using a DCCH channel.

As an embodiment, the sender of the first candidate cell list is a serving cell of the first node.

As an embodiment, the sender of the first candidate cell list is a primary serving cell of the first node.

As one embodiment, the sender of the first candidate cell list is a secondary serving cell of the first node.

As an embodiment, the sender of the first candidate cell list is an MCG of the first node.

As an embodiment, the sender of the first candidate cell list is the SCG of the first node.

As an embodiment, the sender of the first candidate cell list is a PCell of the first node.

As an embodiment, the sender of the first candidate cell list is a PSCell of the first node.

As one embodiment, the sender of the first candidate cell list is the SPCell of the first node.

As an embodiment, the first candidate cell list comprises K candidate cells, where K is a positive integer.

As an embodiment, the determination of the first candidate cell list is related to the first timer.

As an embodiment, when the first timer is T304, the first candidate cell list includes cells corresponding to the MeasId included in condConfigToAddModList-r 16.

As an embodiment, when the first timer is T304, the first candidate cell list includes cells corresponding to a masterCellGroup included in the received RRCReconfiguration.

As an embodiment, when the first timer is T304, the first candidate cell list includes only the third serving cell.

As an embodiment, when the first timer is T316, the first candidate cell list includes all cells in the SCG of the first node.

As one embodiment, when the first timer is T316, the first candidate cell list includes PSCell cells in all SCGs of the first node.

Example 11

Embodiment 11 illustrates a schematic diagram of a first candidate cell list indicating candidate cells that can be selected when a first timer is in a stop state according to an embodiment of the present application, as shown in fig. 11.

As an embodiment, when the first timer is in a stop state, the first node selects a cell in the second candidate cell list as the second serving cell.

As an embodiment, when the first timer is in a stop state, the first node randomly selects a cell in the second candidate cell list as the second serving cell.

As an embodiment, when the first timer is in a running state, the first node selects a cell with the best channel quality in the second candidate cell list as the second serving cell.

As an embodiment, the second candidate cell list is sent by higher layer signaling.

As an embodiment, the second candidate cell list is sent by RRC signaling.

As an embodiment, the second candidate cell list is transmitted by a MAC CE.

As an embodiment, the second candidate cell list is transmitted by broadcasting.

As a sub-embodiment of the above embodiment, the broadcast manner includes SIB.

As an embodiment, the second candidate cell list is sent by means of unicast.

As an embodiment, the sender of the second candidate cell list is a serving cell of the first node.

As an embodiment, the sender of the second candidate cell list is a primary serving cell of the first node.

As an embodiment, the sender of the second candidate cell list is a secondary serving cell of the first node.

As an embodiment, the sender of the second candidate cell list is an MCG of the first node.

As an embodiment, the sender of the second candidate cell list is the SCG of the first node.

As an embodiment, the sender of the second candidate cell list is a PCell of the first node.

As an embodiment, the sender of the second candidate cell list is the PSCell of the first node.

As one embodiment, the sender of the second candidate cell list is the SPCell of the first node.

As an embodiment, the second candidate cell list comprises K candidate cells, where K is a positive integer.

As an embodiment, the determination of the second candidate cell list is related to the first timer.

As an embodiment, when the first timer is T304, the second candidate cell list includes cells corresponding to the MeasId included in condConfigToAddModList-r 16.

As an embodiment, when the first timer is T304, the second candidate cell list includes cells corresponding to a masterCellGroup included in the received RRCReconfiguration.

For one embodiment, when the first timer is T304, the second candidate cell list includes cells indicated in SIBs.

As one embodiment, when the first timer is T311, the second candidate cell list includes cells indicated in SIBs.

As an embodiment, when the first timer is T316, the second candidate cell list includes all cells in the SCG of the first node.

As one embodiment, when the first timer is T316, the second candidate cell list includes PSCell cells in all SCGs of the first node.

As one embodiment, the first candidate cell list is orthogonal to the second candidate cell list.

As an embodiment, the first candidate cell list is the same as the second candidate cell list.

As one embodiment, the first candidate cell list is different from the second candidate cell list, and an intersection of the first candidate cell list and the second candidate cell list is not empty.

As one embodiment, the first candidate cell list includes the second candidate cell list.

As one embodiment, the second candidate cell list includes the first candidate cell list.

Example 12

Embodiment 12 illustrates a block diagram of a processing apparatus for use in a first node according to an embodiment of the present application; as shown in fig. 12. In fig. 12, the processing means 1200 in the first node comprises a first receiver 1201 and a first transmitter 1202. In the case of the embodiment 12, however,

a first receiver 1201 determining a radio link failure with a first serving cell;

a first transmitter 1202, configured to select a second serving cell as a response to the determination that the radio link with the first serving cell fails when the first timer is in a stopped state, start a second timer, and transmit a first type uplink access signal for the second serving cell; when the first timer is in a running state, sending a first type uplink access signal aiming at a third service cell;

For an embodiment, the first receiver 1201 receives a first signaling, where the first signaling indicates a first set of reference signals, and the first signaling indicates a first trigger condition;

the first receiver 1201 performing a first channel measurement for the first set of reference signals; wherein the first timer is in a running state, the running state of the first timer being started in response to the result of the first channel measurement satisfying the first trigger condition; the first set of reference signals is transmitted by a third serving cell; the first signaling is transmitted by a fourth serving cell.

For an embodiment, the first receiver 1201 receives a first candidate cell list, and the third serving cell is a cell in the first candidate cell list, and the first candidate cell list indicates candidate cells that can be selected when the first timer is in a running state.

As an embodiment, the first receiver 1201 receives a second candidate cell list, where the second serving cell is a cell in the second candidate cell list, and the second candidate cell list indicates candidate cells that can be selected when the first timer is in a stop state.

As an embodiment, the first receiver 1201 receives a second signaling, where the second signaling is used to indicate RRC connection establishment, and the first type of uplink access signal is a feedback to the second signaling;

As an embodiment, the first transmitter 1202 restarts the first timer in response to the sending of the first type of uplink access signal for the third serving cell.

As an embodiment, the first node is a User Equipment (UE).

As an embodiment, the first node is a terminal supporting a large delay difference.

As an embodiment, the first node is a terminal supporting NTN.

As an embodiment, the first node is an aircraft.

As an embodiment, the first node is a vehicle-mounted terminal.

As an embodiment, the first node is a relay.

As an embodiment, the first node is a ship.

As an embodiment, the first node is an internet of things terminal.

As an embodiment, the first node is a terminal of an industrial internet of things.

As an embodiment, the first node is a device supporting low-latency high-reliability transmission.

For one embodiment, the first receiver 1201 includes at least one of the antenna 452, the receiver 454, the receive processor 456, the multiple antenna receive processor 458, the controller/processor 459, the memory 460, or the data source 467 of embodiment 4.

For one embodiment, the first transmitter 1202 may include at least one of the antenna 452, the transmitter 454, the transmit processor 468, the multi-antenna transmit processor 457, the controller/processor 459, the memory 460, or the data source 467 of embodiment 4.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. User equipment, terminal and UE in this application include but not limited to unmanned aerial vehicle, Communication module on the unmanned aerial vehicle, remote control aircraft, the aircraft, small aircraft, the cell-phone, the panel computer, the notebook, vehicle Communication equipment, wireless sensor, network card, thing networking terminal, the RFID terminal, NB-IoT terminal, MTC (Machine Type Communication) terminal, eMTC (enhanced MTC) terminal, the data card, network card, vehicle Communication equipment, low-cost cell-phone, low-cost panel computer, satellite Communication equipment, ship Communication equipment, wireless Communication equipment such as NTN user equipment. The base station or the system device in the present application includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, a gNB (NR node B) NR node B, a TRP (Transmitter Receiver Point), an NTN base station, a satellite device, a flight platform device, and other wireless communication devices.

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

Claims

1. A first node for wireless communication, comprising:

2. The first node of claim 1, comprising:

3. The first node of claim 1, comprising:

4. The first node according to any of claims 1 to 3,

5. The first node of claim 1, comprising:

6. The first node of claim 1, comprising:

7. A method in a first node used for wireless communication, comprising:

determining a radio link failure with a first serving cell;