CN115299090B

CN115299090B - Wireless link monitoring mode conversion method and terminal equipment

Info

Publication number: CN115299090B
Application number: CN202080098666.9A
Authority: CN
Inventors: 李海涛; 胡奕; 胡荣贻
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2024-07-05
Anticipated expiration: 2040-04-23
Also published as: WO2021212436A1; CN115299090A

Abstract

The invention discloses a Radio Link Monitoring (RLM) mode conversion method, a terminal device, a chip, a computer readable storage medium, a computer program product and a computer program, wherein the method comprises the following steps: the terminal equipment determines the conversion between different RLM modes according to the RLM conversion conditions; wherein, the RLM conversion condition is at least related to a count value of a synchronization instruction or a step-out instruction continuously received by the terminal device; the RLM mode includes: a normal RLM mode and a relaxed RLM mode, the normal RLM mode having a measurement interval smaller than that of the relaxed RLM mode.

Description

Wireless link monitoring mode conversion method and terminal equipment

Technical Field

The present invention relates to the field of communications, and in particular, to a Radio link monitoring (RLM, radio LINK MANAGEMENT) mode conversion method, a terminal device, a chip, a computer-readable storage medium, a computer program product, and a computer program.

Background

In the related art, RLM is used for a terminal device to monitor the channel quality of a downlink of a serving cell, and the terminal device determines whether the terminal device has recovered downlink synchronization or is in a downlink out-of-synchronization state according to the monitored or measured channel quality of the downlink of the serving cell and a corresponding threshold in a specified time. For terminal devices with power saving requirements, the measurement for RLM will be relaxed, i.e. a relaxed RLM mode is introduced, but how to initiate the measurement of the relaxed RLM mode is a problem to be solved.

Disclosure of Invention

To solve the above technical problems, embodiments of the present invention provide a Radio link monitoring (RLM, radio LINK MANAGEMENT) mode conversion method, a terminal device, a chip, a computer readable storage medium, a computer program product, and a computer program.

In a first aspect, a radio link monitoring RLM mode conversion method is provided, including:

The terminal equipment determines the conversion between different RLM modes according to the RLM conversion conditions;

wherein, the RLM conversion condition is at least related to a count value of a synchronization instruction or a step-out instruction continuously received by the terminal device;

the RLM mode includes: a normal RLM mode and a relaxed RLM mode, the normal RLM mode having a measurement interval smaller than that of the relaxed RLM mode.

In a second aspect, there is provided a terminal device comprising:

a processing unit that determines transitions between different RLM modes according to RLM transition conditions;

In a third aspect, there is provided a terminal device comprising: a processor and a memory for storing a computer program capable of running on the processor,

Wherein the memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the steps of the method.

In a fourth aspect, a chip is provided, comprising: and a processor for calling and running the computer program from the memory, so that the device on which the chip is mounted performs the method as described above.

In a fifth aspect, a computer readable storage medium is provided for storing a computer program for causing a computer to perform the steps of the method as described above.

In a sixth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method as described above.

In a seventh aspect, there is provided a computer program for causing a computer to perform the method as described above.

By adopting the scheme provided in this embodiment, it is possible to determine to switch between the normal RLM mode and the relaxed RLM mode according to the RLM switching condition, the specific RLM switching condition being related to the count value of the synchronization instruction or the out-of-synchronization instruction. Thus, it is defined how to enter the relaxed RLM mode after the relaxed RLM mode is introduced.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture according to an embodiment of the present application;

FIG. 2 is a schematic flow chart of an RLM mode conversion method according to an embodiment of the present application;

FIG. 3 is a schematic diagram II of an RLM mode conversion flow provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of a processing scenario I according to an embodiment of the present application;

FIG. 5 is a third schematic diagram of an RLM mode conversion flow provided in an embodiment of the present application;

FIG. 6 is a second schematic diagram of a processing scenario provided in an embodiment of the present application;

FIG. 7 is a schematic diagram of a RLM mode conversion flow provided in an embodiment of the present application;

fig. 8 is a schematic diagram III of a processing scenario provided in an embodiment of the present application;

fig. 9 is a schematic diagram of a composition structure of a terminal device according to an embodiment of the present application;

Fig. 10 is a schematic diagram II of a composition structure of a terminal device according to an embodiment of the present application;

Fig. 11 is a schematic diagram of a communication device according to an embodiment of the present invention;

FIG. 12 is a schematic block diagram of a chip provided by an embodiment of the present application;

fig. 13 is a schematic diagram of a communication system architecture according to an embodiment of the present application.

Detailed Description

For a more complete understanding of the nature and the technical content of the embodiments of the present invention, reference should be made to the following detailed description of embodiments of the invention, taken in conjunction with the accompanying drawings, which are meant to be illustrative only and not limiting of the embodiments of the invention.

The following description of the technical solutions according to the embodiments of the present application will be given with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The technical scheme of the embodiment of the application can be applied to various communication systems, such as: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), general Packet Radio Service (GPRS), long term evolution (Long Term Evolution, LTE), LTE frequency division duplex (Frequency Division Duplex, FDD), LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) or 5G systems, and the like.

By way of example, a communication system 100 to which embodiments of the present application may be applied may be as shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with the UE120 (or referred to as a communication terminal device, terminal device). Network device 110 may provide communication coverage for a particular geographic area and may communicate with UEs located within that coverage area. Alternatively, the network device 110 may be a network device (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a network device (NodeB, NB) in a WCDMA system, an evolved network device (Evolutional Node B, eNB or eNodeB) in an LTE system, or a wireless controller in a cloud wireless access network (Cloud Radio Access Network, CRAN), or the network device may be a mobile switching center, a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

The communication system 100 also includes at least one UE120 located within the coverage area of the network device 110. "UE" as used herein includes, but is not limited to, connection via wireline, such as via public-switched telephone network (Public Switched Telephone Networks, PSTN), digital subscriber line (Digital Subscriber Line, DSL), digital cable, direct cable connection; and/or another data connection/network; and/or via a wireless interface, e.g., for a cellular network, a wireless local area network (Wireless Local Area Network, WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and/or means of another UE arranged to receive/transmit communication signals; and/or an internet of things (Internet of Things, ioT) device. UEs arranged to communicate over a radio interface may be referred to as "wireless communication terminal devices", "wireless terminal devices" or "mobile terminal devices".

Optionally, a Device-to-Device (D2D) communication may be performed between UEs 120.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

With the pursuit of speed, delay, high-speed mobility, energy efficiency and the diversity and complexity of future life services, the 3GPP international standards organization starts to develop 5G for this purpose. The main application scenario of 5G is: enhancing mobile ultra-wideband (eMBB), low latency high reliability communications (URLLC), large scale machine type communications (mMTC).

NR can also be deployed independently, and a new RRC state, namely RRC_INACTIVE state, is defined in the 5G network environment for the purposes of reducing air interface signaling and quickly recovering wireless connection and quickly recovering data service. This state is different from the rrc_idle and rrc_active states. Wherein,

Rrc_idle: mobility is based on cell selection reselection of the UE, paging is initiated by the CN and paging areas are configured by the CN. The base station side does not have the UE AS context. There is no RRC connection.

Rrc_connected: there is an RRC connection and the base station and UE have a UE AS context. The network side knows that the location of the UE is cell specific. Mobility is network-side controlled mobility. Unicast data may be transmitted between the UE and the base station.

Rrc_inactive: mobility is cell selection reselection based on UE, there is a connection between CN-NRs, UE AS context exists on a certain base station, paging is triggered by RAN, paging area based on RAN is managed by RAN, network side knows UE location is based on paging area level of RAN.

Radio link monitoring (RLM: radio link monitoring) is listening to the channel quality of the serving cell downlink, the physical layer evaluates the radio link quality for a specified time and compares with Qin, qout threshold (SINR), if lower than Qout, the physical layer reports an out-of-sync indication to the higher layers, if higher than Qin, the physical layer reports an in-sync indication to the higher layers. Qout and Qin thresholds are determined by detecting the BLER of PDCCH format 1-0. Wherein the BLER values corresponding to Qin and Qout are configured by RRC signaling per cell. Default for Qout, the BLER of PDCCH is 10% and Qin corresponds to 2%.

The downlink out-of-step decision of the UE at the network side involves the following timers and constants, N310, T310, N311. These timers and constant parameters may be configured to the UE (RLF-TimersAndConstants IE) by dedicated signaling, and if not configured, parameters (UE-TimersAndConstants IE) within the system broadcast (SIB 1) are used.

When the UE is in rrc_connected state, N310 consecutive "out_of_sync" are received and T310, T301, T304, T311 are not running, a timer T310 is started. If N311 consecutive "in Sync" are received before the timer expires, the timer T310 is stopped, indicating that the UE has resumed the downlink synchronization. Otherwise, the UE is in a downlink out-of-step state, namely RLF.

The RLM configuration (RadioLinkMonitoringConfig) may be configured for the network device to use an RRC reconfiguration message to configure the terminal device, and may include: and configuring an SSB/CSI-RS reference signal of the terminal equipment for radio link detection (RLM). When RLM measurements are made, the new-to-quality can be evaluated at every interval of measurement indicated. The determination of the measurement interval (which may be referred to as Indication period) is divided into:

When DRX is not configured: a maximum of both 10ms and minimum RLM reference signal periods;

when configuring DRX, the maximum value of 10ms, the minimum RLM reference signal period and the DRX period is set.

At each indication period, the physical layer may report a synchronization indication corresponding to Qin, a failure indication corresponding to Qout, or nothing to the RRC layer.

In the NR Rel-17 terminal power saving project, it is planned to introduce measurement relaxation for RLM (this application refers to a relaxed RLM mode), where the discussion includes ：Study the feasibility and performance impact of relaxing UE measurements for RLM and/or BFD,particularly for low mobility UE with short DRX periodicity/cycle,and specify,if agreed,relaxation in the corresponding requirements[RAN4]( to study the feasibility and performance impact of relaxing UE measurements for RLM and/or BFD, especially for terminal devices with low mobility with short DRX periodicity/period, and to specify relaxation measurement requirements with consent. How to initiate the measurement of the relaxed RLM mode is a problem to be solved by the application.

An embodiment of the present invention provides a RLM mode conversion method, as shown in fig. 2, including:

Step 21: the terminal equipment determines the conversion between different RLM modes according to the RLM conversion conditions;

The scheme provided by the present embodiment will be described with reference to a plurality of examples:

EXAMPLE 1,

In this example, the first RLM transition condition includes: the count value of the synchronization instruction continuously received by the terminal equipment exceeds a first quantity threshold value;

The second RLM transition condition includes: and the count value of the step-out indication continuously received by the terminal equipment exceeds a second number threshold value.

The first quantity threshold value and the second quantity threshold value are preset or configured for network equipment. The presetting can be performed by the terminal equipment according to a protocol; the network device configuration may be understood as that the network device is preconfigured for the terminal device through configuration information, and in particular, the network device may be configured for the terminal device through a radio resource control (RRC, radio Resource Control) reconfiguration message.

The terminal device receives the synchronization instruction or the out-of-step instruction, and specifically may be that an RRC layer of the terminal device receives the synchronization instruction; or the RRC layer of the terminal device receives the out-of-sync indication.

Correspondingly, the terminal equipment determines conversion among different RLM modes according to the RLM conversion conditions, and comprises the following steps:

under the condition that the terminal equipment adopts a normal RLM mode to carry out link detection, if a first RLM conversion condition is met, determining to switch from the normal RLM mode to a relaxed RLM mode;

Or alternatively

And under the condition that the terminal equipment adopts the relaxed RLM mode to carry out link detection, if the second RLM conversion condition is met, determining to switch from the relaxed RLM mode to the normal RLM mode.

The following describes this example with reference to fig. 3, in which a network device configures a terminal device through RRC information:

step 31, the terminal equipment receives the RRC reconfiguration message of the network equipment;

specifically, the terminal device may be in a connected state; the network device may be an access network device, for example, a base station (eNB, gNB, etc.).

The RRC reconfiguration message may include: radio link monitoring configuration (RadioLinkMonitoringConfig) and Radio Link Failure (RLF) -timer and constant (TimersAndConstants) configuration, etc.

In particular, the RRC reconfiguration message may include at least one of:

1. failureDetectionResources (failure detection resource) configurations, which may include SSB/CSI-RS resource configurations for radio link monitoring;

2. Related parameters of RLF (radio link failure ) timer, such as parameters of N310, N311, T310, etc.;

3. The RRC reconfiguration message may further include: a first number threshold and a second number threshold.

For example, the first number threshold value may be denoted as M1 and the second number threshold value may be denoted as N1; and M1 and N1 are the quantity threshold of the terminal equipment for executing RLM mode switching. Wherein M1 is the maximum number of times the RRC layer receives successive synchronization fingers (in-sync) from the physical layer; n1 is the maximum number of times the RRC layer receives consecutive out-of-sync (out-of-sync) indications from the physical layer.

The counting process with respect to the count value in this embodiment may be implemented by a counter or counter, and since the count value of the synchronization instruction and the count value of the out-of-step instruction are referred to in this embodiment, respectively, it may be implemented by setting two counters (counters), the counter of the synchronization instruction may be denoted as M1-counter, and the counter of the out-of-step instruction may be denoted as N1-counter.

It should be noted that the first number threshold value and the second number threshold value may be used as parameters in the radio link monitoring configuration (RadioLinkMonitoringConfig) or may be parameters in the Radio Link Failure (RLF) -timer and constant (TimersAndConstants) configuration; of course, parameters configured separately from the above two configurations may be used, and are not limited in this example.

Step 32, based on the network configuration, the terminal device is in the normal RLM mode by default.

And step 33, if the first RLM conversion condition is met under the condition that the terminal equipment adopts the normal RLM mode to carry out link detection, determining to switch from the normal RLM mode to the relaxed RLM mode.

In an example, the first RLM transition condition includes: the counted value of the synchronization indication continuously received by the RRC layer of the terminal equipment exceeds a first quantity threshold value.

That is, when the terminal device performs link detection in the normal RLM mode, if the RRC layer receives a continuous synchronization instruction, counts the count value of the continuously received synchronization instruction to obtain a corresponding count value, and if the count value reaches a first number threshold value, the terminal device determines to enter a relaxed RLM mode; otherwise, the normal RLM mode is maintained.

Further, when the terminal device enters a normal RLM mode, the RRC layer of the terminal device instructs the physical layer to perform link detection by using a measurement requirement corresponding to the normal RLM mode.

The measurement requirements corresponding to the normal RLM mode may be preset according to a protocol, or may be preset for the network device to configure the terminal device, and if the measurement requirements are preset, the measurement requirements may be configured for the terminal device through RRC signaling, or DCI, etc.

This step involves a process of counting the synchronization indications, and may include a process of initializing or resetting the count value of the synchronization indications and adding one to the count value of the synchronization indications. The concrete explanation is as follows:

if the first condition is met, the terminal equipment adds one to the count value of the synchronous indication; the first condition includes: and under the condition that the terminal equipment is in a normal RLM mode, the RRC layer of the terminal equipment receives the synchronization instruction of the physical layer.

That is, if the terminal device is in the normal RLM mode, the RRC layer of the terminal device receives 1 "in-sync" (synchronization) indication from the physical layer, and self-increments m1_counter (count value of synchronization indication) by 1.

If the second condition is met, initializing or resetting the count value of the synchronous indication by the terminal equipment;

the second condition includes at least one of:

The terminal equipment enters a normal RLM mode;

The terminal equipment receives the step-out indication;

the terminal equipment receives RRC reconfiguration information containing synchronous reconfiguration of the cell group;

The terminal device initiates an RRC connection reconfiguration procedure.

There are two possibilities that the terminal device enters the normal RLM mode, one is that the terminal device enters the normal RLM mode from the relaxed RLM mode, and the other is that the terminal device directly enters the normal RLM mode by default.

The terminal device receives the out-of-step indication, and may receive an out-of-step (out-of-sync) indication of the physical layer for the RRC layer.

After performing the completion step 33, the terminal device may switch from the normal RLM mode to the relaxed RLM mode; further, the present example may further include:

Step 34: and under the condition that the terminal equipment adopts the relaxed RLM mode to carry out link detection, if the second RLM conversion condition is met, determining to switch from the relaxed RLM mode to the normal RLM mode.

The second RLM transition condition includes: and the counted value of the step-out indication continuously received by the RRC layer of the terminal equipment exceeds a second quantity threshold value.

That is, when the terminal device performs link detection in the relaxed RLM mode, if the RRC layer receives a continuous out-of-step indication, counts the count value of the continuously received out-of-step indication to obtain a corresponding count value, and if the count value reaches a second number threshold value, the terminal device determines to enter the relaxed RLM mode; otherwise, the RLM mode is kept relaxed.

Further, when the terminal device enters a relaxed RLM mode, the RRC layer of the terminal device instructs the physical layer to perform link detection by using a measurement requirement corresponding to the relaxed RLM mode.

The measurement requirements corresponding to the relaxed RLM mode may be preset according to a protocol, or may be preset for the network device to configure the terminal device, and if the measurement requirements are preset, the measurement requirements may be configured for the terminal device through RRC signaling, or DCI, etc.

Regarding the relaxed RLM mode and the normal RLM mode, the measurement requirements for both correspond to the difference in that the normal RLM mode may employ a first measurement interval, the relaxed RLM mode may employ a second measurement interval, and the first measurement interval is smaller than the second measurement interval.

This step involves a process of counting the count value of the out-of-step instruction, and may include a process of initializing or resetting the count value of the out-of-step instruction and incrementing the count value of the out-of-step instruction by one. The concrete explanation is as follows:

if the third condition is met, the terminal equipment adds one to the count value of the step-out indication; the third condition includes: and under the condition that the terminal equipment is in a relaxed RLM mode, the RRC layer of the terminal equipment receives the out-of-step indication of the physical layer.

That is, if the terminal device is in the relaxed RLM mode, the RRC layer of the terminal device receives 1 "out-of-sync" indication from the physical layer, and adds 1 to the N1 counter (count value of out-of-sync indication) itself.

If the fourth condition is met, initializing or resetting the count value of the step-out indication by the terminal equipment;

the fourth condition includes at least one of:

the terminal equipment is switched from a normal RLM mode to a relaxed RLM mode;

The terminal device receives a synchronization indication (i.e. an "in-sync" indication);

The terminal device initiates an RRC connection reconfiguration procedure.

Thus far, the entire flow of the present example is completed, and the present example is described with reference to fig. 4, and it can be seen from fig. 4 that the measurement interval of the normal RLM mode is smaller than that of the relaxed RLM mode; solid arrows in the figure indicate synchronous indications, and broken arrows indicate out-of-step indications; the first number threshold may be equal to 8 for the assumption of M1 and the second number threshold may be equal to 4 for the assumption of N1. Specific:

In fig. 4, after the normal RLM mode is entered on the left side, when the RRC layer receives the first synchronization instruction, the first condition is satisfied, and the count value of the synchronization instruction may be incremented by 1, and the second is a continuously received synchronization instruction, and the first condition is satisfied, and the count value of the synchronization instruction is incremented by 1; thirdly, receiving the step-out indication, and according to the requirement of the second condition, the terminal equipment can see that the count value of the step-out indication can be set to 0; after that, 8 synchronization instructions are continuously received, the count value of the synchronization instructions reaches 8, namely a first quantity threshold value (called M1) configured by the network equipment, so that the entering of the loose RLM mode is determined;

In the figure, after the terminal device enters the RLM mode, the fourth condition is satisfied, and the count value of the step-out indication may be initialized to 0; when the first indication is received as the step-out indication, the count value of the step-out indication can be increased by 1 according to the third condition; then continuously receiving two synchronous instructions, and according to a fourth condition, determining to reset the count value of the step-out instruction; then, 4 out-of-step indications are continuously received, it may be determined that the count value of the out-of-step indications is continuously increased by 1 according to a third condition, and after the processing of increasing the count value by 1 for 4 times is performed, the count value of the out-of-step indications reaches a second number threshold value (N1), and it is determined to switch from the relaxed RLM mode to the normal RLM mode.

With this example, a continuous first number threshold (M1) of synchronization indications represents that the channel is good enough that the likelihood of near-term link degradation can be predicted to be small, and therefore a relaxed RLM mode can be entered with energy savings; the continuous second number of out-of-step indications (N1) represents that the channel starts to deteriorate, and the terminal device switches back to the normal RLM mode, so that more delay in detecting the radio link failure can be avoided.

EXAMPLE 2,

The difference from example 1 is that this example increases the limitation of time on the basis of example 1, in particular:

The third RLM transition condition includes: in the first duration, the count value of the synchronization instruction continuously received by the terminal equipment exceeds a third quantity threshold value; that is, the RRC layer receives only the "in-sync" synchronization indication for a period of time, and the number of "in-sync" synchronization indications is greater than the third number threshold (M2).

The fifth RLM transition condition includes: and in the second time period, the count value of the step-out indication continuously received by the terminal equipment exceeds a fourth quantity threshold value. That is, the RRC layer receives only the "out-of-sync indication for a period of time, and the number of" out-of-sync indications is greater than a fourth number threshold (N2).

The counting process with respect to the count value in this embodiment may be implemented by a counter or counter, and since the count value of the synchronization instruction and the count value of the out-of-step instruction are referred to in this embodiment, respectively, it may be implemented by setting two counters (counters), the counter of the synchronization instruction may be denoted as M2-counter, and the counter of the out-of-step instruction may be denoted as N2-counter.

if the terminal equipment adopts the normal RLM mode and the third RLM conversion condition is met, determining to switch from the normal RLM mode to the relaxed RLM mode;

or if the terminal device adopts the relaxed RLM mode, if the fifth RLM transition condition is satisfied, determining to switch from the relaxed RLM mode to the normal RLM mode.

The first duration, the second duration, the third quantity threshold value, and the fourth quantity threshold value are preset or configured for network equipment.

The first time length is the timing time length of the first timer, and the second time length is the timing time length of the second timer. That is, by maintaining the first timer and the second timer, the count value and the duration of the synchronization instruction continuously received by the terminal device and the count value and the duration of the out-of-step instruction continuously received by the terminal device are determined, so as to determine whether to perform the RLM mode conversion.

The following describes, with reference to fig. 5, a scenario in which the network device performs configuration of the first duration, the second duration, the third quantity threshold value, and the fourth quantity threshold value by using RRC information as a terminal device, where this example is described:

Step 51, the terminal equipment receives the RRC reconfiguration message of the network equipment;

In particular, the RRC reconfiguration message may include at least one of:

3. The RRC reconfiguration message may further include: the third quantity threshold value (M2) and the fourth quantity threshold value (N2) further comprise a timing duration (T1) of the first timer, a timing duration (T2) parameter of the second timer and the like.

Wherein, M2 and N2 are count value (counter) thresholds (or called number thresholds) for performing RLM mode switching, and T1 and T2 are timer durations for performing RLM mode switching; wherein M2 is the maximum number of times the RRC layer receives consecutive "in-sync" sync indications from the physical layer during T1 operation time, and N2 is the maximum number of times the RRC layer receives consecutive "out-of-sync indications from the physical layer during T2 operation time.

Step 52, based on the network configuration, the terminal device defaults to a normal RLM mode.

Step 53, if the terminal device adopts the normal RLM mode, if the third RLM conversion condition is satisfied, it is determined to switch from the normal RLM mode to the relaxed RLM mode.

The third RLM transition condition includes: and in the first duration, the counted value of the synchronization indication continuously received by the RRC layer of the terminal equipment exceeds a third quantity threshold value.

That is, when the terminal device performs link detection in the normal RLM mode, if the RRC layer receives only the "in-sync" synchronization indication within the time T1 and the count value of the "in-sync" synchronization indication is greater than M2, the terminal device enters the relaxed RLM mode and indicates to the physical layer to enable the request of the relaxed RLM; otherwise, the normal RLM mode is maintained.

This step involves a process of counting the count value of the synchronization instruction, and may include a process of initializing or resetting the count value of the synchronization instruction and adding one to the count value of the synchronization instruction. The concrete explanation is as follows:

if the fifth condition is met, the terminal equipment adds one to the count value of the synchronous indication;

the fifth condition includes at least one of:

the RRC layer of the terminal equipment receives a synchronization instruction of a physical layer under the condition that the terminal equipment is in a normal RLM mode and the first timer is in an operation state;

And under the conditions that the terminal equipment is in a normal RLM mode, the first timer is not operated, and the count value of the synchronization indication is 0, the RRC layer of the terminal equipment receives the synchronization indication of the physical layer.

That is, if the terminal device is in the normal RLM mode and the first timer (T1) is running, the RRC layer of the terminal device receives 1 "in-sync" (synchronization) indication from the physical layer, and self-increments m2_counter (count value of synchronization indication) by 1;

Or if the terminal device is in the normal RLM mode, m2_counter (count value of synchronization indication) is 0, and the first timer (T1) is not running, at this time, the RRC layer of the terminal device receives 1 "in-sync" synchronization indication from the physical layer, and adds m2_counter (count value of synchronization indication) to 1 (at this time, the process of starting T1 may be further included).

The process of initializing or resetting the count value of the synchronization indication may include:

If the sixth condition is met, initializing or resetting the count value of the synchronous indication by the terminal equipment;

the sixth condition includes at least one of:

The terminal equipment enters a normal RLM mode;

The terminal equipment receives the step-out indication;

the terminal equipment initializes an RRC connection reconfiguration process;

The first timer times out.

This step also differs from step 33 of example 1 in that the present example increases the timing duration of the first timer and the second timer, and if a synchronization instruction is received in the normal RLM mode, the first timer may be operated, and the processing manner for stopping the first timer may include:

the terminal device stops the first timer when the following condition is satisfied:

Under the condition that the terminal equipment is in a normal RLM mode and the first timer is in a running period, the RRC layer of the terminal equipment receives an out-of-step indication of the physical layer; i.e. the terminal device is in normal RLM mode, T1 (first timer) is running, the RRC layer receives 1 Out-of-sync indication from the physical layer, at which time the timing of the first timer may be stopped, i.e. in normal RLM mode if the count value for the synchronization indication needs to be reset once the Out-of-sync indication is received, at which time the timing of the first timer needs to be stopped accordingly.

Or the terminal device switches from the normal RLM mode to the relaxed RLM mode. That is, if the terminal device switches to the relaxed RLM mode, it is no longer necessary to maintain the timing of the first timer, at which point the first timer may be stopped.

The processing manner related to starting or restarting the first timer may include: the terminal device starts or restarts the first timer when the following condition is satisfied: and under the condition that the terminal equipment is in a normal RLM mode and the count value of the synchronization indication is 0, the RRC layer of the terminal equipment receives the synchronization indication of the physical layer. That is, the terminal device is in the normal RLM mode, and the count value (m2_counter) of the synchronization indication is 0, at this time, if the RRC layer receives 1 "in-sync" synchronization indication from the physical layer, the first timer is started or restarted to start counting.

There may be two cases, in which, in one case, the count value of the synchronization indication is 0, then it may be considered that the normal RLM mode has just been entered, at which time the first timer may be started if the synchronization indication is received; or in another case the terminal device is already in normal RLM mode, but the previous reception of the out-of-sync indication causes the first timer to stop, at which point the first timer may be restarted if the sync indication is received again.

In one example, the processing of the first timer and the count value of the synchronization instruction may include: if the terminal equipment enters a normal RLM mode, initializing a count value of the synchronous indication;

when the synchronization instruction is received, a fifth condition is met, a count value of the synchronization instruction is increased by 1, and a first timer is initialized;

Then, the following processes may be included:

In the process, if the synchronization instruction is continuously received, the count value of the synchronization instruction is continuously incremented by 1, and the operation of the first timer is maintained (i.e., the operation state of the first timer is maintained), and if the count value of the continuous received synchronization instruction reaches the third number threshold value, and the first timer does not timeout, i.e., the third RLM transition condition is satisfied, it may be determined to transition to the relaxed RLM mode while the first timer is stopped.

In still another process, if the synchronization instruction is continuously received, the count value of the synchronization instruction is continuously incremented by 1 and the operation of the first timer is maintained (i.e., the operation state of the first timer is maintained), if the count value of the continuous reception of the synchronization instruction does not reach the third number threshold value and the first timer does not timeout, the step-out instruction is received at this time, the condition for stopping the first timer is satisfied, the first timer is stopped, and the sixth condition is satisfied, the count value of the synchronization instruction is reset to 0 at this time, and the terminal device is maintained in the normal RLM mode.

It should be noted that in this process, only one of the sixth conditions is schematically described, and the other cases of the sixth condition, although not described in connection with the example, are also within the scope of protection of the present example, but are not exhaustive.

After performing the completion step 53, the terminal device may switch from the normal RLM mode to the relaxed RLM mode; further, the present example may further include:

Step 54: and under the condition that the terminal equipment adopts the relaxed RLM mode, if the fifth RLM conversion condition is met, determining to switch from the relaxed RLM mode to the normal RLM mode.

The fifth RLM transition condition includes: and in the second time period, the count value of the step-out indication continuously received by the terminal equipment exceeds a fourth quantity threshold value.

That is, when the terminal device performs link detection in the relaxed RLM mode, if the RRC layer receives only the "Out-of-sync indication within the time T2 (the second duration), and the count value of the" Out-of-sync indication is greater than N2 (the fourth quantity threshold), the UE enters the normal RLM mode and indicates to the physical layer to enable the request of the normal RLM; otherwise, the RLM mode is kept relaxed.

if the seventh condition is met, the terminal device increases the count value of the step-out indication by one:

the seventh condition includes at least one of:

The RRC layer of the terminal device receives an out-of-sync indication of the physical layer in case the terminal device is in a relaxed RLM mode and the second timer is during operation. I.e. the terminal device is in the relaxed RLM mode, the second timer is running, the RRC layer receives 1 out-of-sync indication from the physical layer, and the count value (n2_counter) of the out-of-sync indication is incremented by 1.

Or under the conditions that the terminal equipment is in a relaxed RLM mode, the second timer is not operated, and the count value of the synchronization indication is 0, the RRC layer of the terminal equipment receives the out-of-synchronization indication of the physical layer. That is, the terminal device is in the relaxed RLM mode, the count value of the out-of-step indication (n2_counter) is 0 and the second timer is not running, the RRC layer receives 1 out-of-sync out-of-step indication from the physical layer, and the count value of the out-of-step indication (n2_counter) is self-incremented by 1.

In this example, the manner of resetting the count value of the out-of-step instruction may include:

If the eighth condition is met, the terminal equipment resets the count value of the step-out indication;

the eighth condition includes at least one of:

the terminal equipment receives the synchronization instruction;

the terminal equipment initializes an RRC connection reconfiguration process;

The second timer times out.

Also, this step is different from step 34 in example 1 in that this example adds processing for initialization, reset, or stop of the second timer, specifically:

The terminal device starts or restarts the second timer when the following condition is satisfied: and under the condition that the terminal equipment is in a loose RLM mode and the count value of the out-of-step indication is 0, the RRC layer of the terminal equipment receives the out-of-step indication of the physical layer. For example, the terminal device is in the relaxed RLM mode, the n2_counter (count value of Out-of-sync) is 0, and the rrc layer receives 1 Out-of-sync indication from the physical layer.

The terminal device stops the second timer when the following condition is satisfied:

The RRC layer of the terminal equipment receives a synchronization instruction of the physical layer under the condition that the terminal equipment is in a loose RLM mode and a second timer is in a running period;

or the terminal device switches from a relaxed RLM mode to a normal RLM mode.

In one example, the processing of the count value of the second timer and the step-out indication may include: if the terminal equipment enters a relaxed RLM mode, resetting the count value of the step-out indication to 0;

when the step-out indication is received, adding 1 to the count value of the step-out indication, and meeting the starting condition of the second timer, and initializing the second timer at the moment;

Then, the following processes may be included:

In the process, if the step-out indication is continuously received, the count value of the step-out indication is continuously increased by 1, and the operation of the second timer is maintained (i.e., the operation state of the second timer is maintained), and if the count value of the step-out indication is continuously received up to the fourth number threshold value, and the second timer is not timed out, i.e., the fifth RLM transition condition is satisfied, it may be determined to transition to the normal RLM mode while the second timer is stopped.

In still another process, if the step-out indication is continuously received, the count value of the step-out indication is continuously incremented by 1, and the operation of the second timer is maintained (that is, the operation state of the second timer is maintained), if the count value of the step-out indication is continuously received, does not reach the fourth number threshold value, and the second timer is not timed out, the step-in indication is received, and the condition of stopping the second timer is satisfied, the second timer is stopped, and the count value of the step-in indication is reset to 0, and the terminal device is maintained in the normal RLM mode.

Further, if the step-out instruction is received again, the count value of the step-out instruction is increased by 1 according to the time when the step-out instruction is received, and the starting condition of the second timer is met, and at this time, the second timer is initialized and then is circularly processed, and the details are not repeated.

To complete the entire flow of the present example so far, the present example is described with reference to fig. 6, and it can be seen from fig. 6 that the measurement interval of the normal RLM mode is smaller than that of the relaxed RLM mode; solid arrows in the figure indicate synchronous indications, and broken arrows indicate out-of-step indications; the third number threshold may be that M2 is assumed to be equal to 8 and the fourth number threshold may be that N2 is assumed to be equal to 4. Specific:

After entering a normal RLM mode, when the RRC layer receives a first synchronous instruction, adding 1 to the count value of the synchronous instruction, starting a first timer (T1) at the same time, stopping the first timer (T1) when the second and third layers receive an out-of-step instruction, and resetting the count value of the synchronous instruction to 0; after that, 8 synchronization instructions are continuously received, the count value of the synchronization instructions reaches 8, namely, a third quantity threshold value (called M2) configured by the network equipment is not overtime, and the first timer (T1) is not overtime, so that the entering of the loosening RLM mode is determined, and meanwhile, the T1 is stopped;

in the figure, after the terminal equipment enters a relaxed RLM mode, the count value of the step-out indication can be initialized to 0; upon receiving the first indication as an out-of-step indication, a count value of the out-of-step indication may be incremented by 1 and a second timer (T2) started; then continuously receiving two synchronization indications, resetting the count value of the out-of-step indication to 0, and stopping the second timer (T2); then, 4 out-of-step indications are continuously received, it is determined that the count value of the out-of-step indication is continuously increased by 1, after the 4 times of count value-1 processing is performed, the count value of the out-of-step indication reaches a fourth number threshold value (N2), and the second timer T2 is not timed out, it is determined that the RLM mode is shifted from the relaxed RLM mode to the normal RLM mode, and the second timer (T2) is stopped.

With the above example, only the synchronization indication is received within a period of time to represent that the channel quality is not poor, and the count value of the synchronization indication is greater than a threshold to represent that the channel is good enough, so that the possibility of predicting the recent link deterioration is not great, and therefore the UE can save energy and enter the relaxed RLM mode; in contrast, when the step-out indication is received only in a period of time, the channel starts to be degraded, if the count value of the step-out indication is larger than a threshold, the channel is not accidental, and the terminal equipment switches back to the normal RLM mode, so that more delay is avoided from being caused to the radio link failure detection.

EXAMPLE 3,

The present example differs from example 1 in that the limitation of time is increased on the basis of example 1, but differs from the time limitation of example 2 in that the present example is limited with respect to adjacent synchronization indications, or time intervals of adjacent out-of-synchronization indications, in particular:

The fourth RLM transition condition includes: the count value of the synchronization indications continuously received by the terminal equipment exceeds a fifth quantity threshold value, and the time interval of the adjacent synchronization indications is not more than a third duration. The measurement unit of the time interval may be an indication period (indication Period), that is, the RRC layer receives consecutive M3 (the fifth number of threshold values) "in-sync" indications, and adjacent "in-sync" synchronization indications differ by no more than L1 pieces indication period.

The sixth RLM transition condition includes: and the count value of the step-out indication continuously received by the terminal equipment exceeds a sixth quantity threshold value, and the time interval of the adjacent step-out indication is not more than a fourth duration. Wherein the measure of the time interval may be an indication period (indication Period), that is, the RRC layer receives consecutive N3 (sixth number of threshold) out-of-sync indications, and adjacent out-of-sync indications differ by no more than L2 indication period.

If the terminal equipment adopts the normal RLM mode and the fourth RLM conversion condition is met, determining to switch from the normal RLM mode to the relaxed RLM mode;

Or if the terminal device adopts the relaxed RLM mode, if the sixth RLM transition condition is satisfied, determining to switch from the relaxed RLM mode to the normal RLM mode.

The third duration, the fourth duration, the fifth quantity threshold value, and the sixth quantity threshold value are preset or configured for the network device.

The third time length is the timing time length of the third timer, and the fourth time length is the timing time length of the fourth timer. That is, by maintaining the third timer and the fourth timer, the count value and the duration of the synchronization instruction continuously received by the terminal device and the count value and the duration of the out-of-synchronization instruction continuously received by the terminal device are determined, and whether to perform the RLM mode conversion is determined.

The following describes, with reference to fig. 7, a scenario in which the network device performs configuration of the third duration, the fourth duration, the fifth quantity threshold value, and the sixth quantity threshold value by using RRC information as a terminal device, which is described in this example:

Step 71, the terminal equipment receives the RRC reconfiguration message of the network equipment;

In particular, the RRC reconfiguration message may include at least one of:

3. The RRC reconfiguration message may further include: the fifth quantity threshold value (M3) and the sixth quantity threshold value (N3) further comprise a timing duration (L1) of the third timer, a timing duration (L2) parameter of the fourth timer and the like.

The method comprises the steps of M3 and N3 parameters and parameters L1 and L2, wherein M3 and N3 are counter thresholds for UE to execute RLM mode switching, and L1 and L2 are timer duration for counter counting. M3 is the maximum number of times the RRC layer receives consecutive "in-sync" sync indications from the physical layer during L1 runtime, and N3 is the maximum number of times the RRC layer receives consecutive "out-of-sync indications from the physical layer during L2 runtime. The units of L1 and L2 are ms or indication period (indication period).

The counting process with respect to the count value in this embodiment may be implemented by a counter or counter, and since the count value of the synchronization instruction and the count value of the out-of-step instruction are referred to in this embodiment, respectively, it may be implemented by setting two counters (counters), the counter of the synchronization instruction may be denoted as M3-counter, and the counter of the out-of-step instruction may be denoted as N3-counter.

Step 72, based on the network configuration, the terminal device defaults to a normal RLM mode.

And step 73, if the terminal equipment adopts the normal RLM mode and the fourth RLM conversion condition is met, determining to switch from the normal RLM mode to the relaxed RLM mode.

The fourth RLM transition condition includes: the counted value of the synchronization indications continuously received by the RRC layer of the terminal equipment exceeds a fifth quantity threshold value, and the time interval of the adjacent synchronization indications is not more than a third duration.

That is, when the terminal device performs link detection in the normal RLM mode, if the RRC layer receives consecutive M3 "in-sync" synchronization indications and the time interval between every two adjacent "in-sync" synchronization indications does not exceed L1, the UE enters the relaxed RLM mode and indicates to enable a request for releasing RLM to the physical layer.

Further, when the terminal device enters a normal RLM mode, the RRC layer of the terminal device instructs the physical layer to perform link detection by using a measurement requirement corresponding to the normal RLM mode. The measurement requirements corresponding to the normal RLM mode may be preset according to a protocol, or may be preset for the network device to configure the terminal device, and if the measurement requirements are preset, the measurement requirements may be configured for the terminal device through RRC signaling, or DCI, etc.

if the ninth condition is met, the terminal equipment adds one to the count value of the synchronous indication;

the ninth condition includes at least one of:

The RRC layer of the terminal equipment receives a synchronization instruction of the physical layer under the condition that the terminal equipment is in a normal RLM mode and the third timer is in an operation state;

And under the conditions that the terminal equipment is in a normal RLM mode, the third timer is not operated, and the count value of the synchronization indication is 0, the RRC layer of the terminal equipment receives the synchronization indication of the physical layer.

That is, if the terminal device is in the normal RLM mode and the third timer L1 is running, the RRC layer of the terminal device receives 1 "in-sync" (synchronization) indication from the physical layer, and self-increments m3_counter (count value of synchronization indication) by 1.

Or if the terminal device is in the normal RLM mode, m3_counter (count value of synchronization indication) is 0, and the third timer (L1) is not running, at this time, the RRC layer of the terminal device receives 1 "in-sync" synchronization indication from the physical layer, and adds m3_counter (count value of synchronization indication) to 1 (at this time, the process of starting L1 may be further included).

If the tenth condition is met, initializing or resetting the count value of the synchronous indication by the terminal equipment;

Wherein the tenth condition includes at least one of:

The terminal equipment enters a normal RLM mode;

The terminal equipment receives the step-out indication;

the terminal equipment initializes an RRC connection reconfiguration process;

The third timer (L1) times out.

In the normal RLM mode, the processing manner with respect to initializing, resetting, or stopping the third timer may include:

the terminal device starts or restarts the third timer when the following conditions are satisfied: and under the condition that the terminal equipment is in a normal RLM mode, the RRC layer of the terminal equipment receives the synchronization instruction of the physical layer.

The terminal device stops the third timer when at least one of the following conditions is satisfied:

under the condition that the terminal equipment is in a normal RLM mode and the third timer is in an operation state, the RRC layer of the terminal equipment receives an out-of-step instruction of the physical layer;

Or the terminal device switches from the normal RLM mode to the relaxed RLM mode.

In one example, the processing of the count value of the synchronization instruction and the third timer may include: if the terminal equipment enters a normal RLM mode, initializing a count value of the synchronous indication;

When receiving the synchronization instruction, the count value of the synchronization instruction is increased by 1, and a third timer is initialized;

Then, the following processes may be included:

In the process, if the synchronization instruction is received again without the third timer being timed out (i.e., in the running state), the count value of the synchronization instruction is continuously incremented by 1, and the third timer is reset; if the count value of the continuously received synchronization indication reaches the third number threshold value and the third timer has not timed out each time, i.e. the fourth RLM transition condition is met, it may be determined to transition to the relaxed RLM mode while the third timer is stopped.

In still another process, if a synchronization instruction is received in the case where the third timer has not timed out (in an operating state), the count value of the synchronization instruction is incremented by 1; if the count value of the continuous received synchronization instruction does not reach the third quantity threshold value, or the third timer is overtime at any time, the normal RLM mode is maintained, or the step-out instruction is received at the moment, the count value of the synchronization instruction is reset to 0, and the terminal equipment is maintained in the normal RLM mode.

After performing the completion step 73, the terminal device may switch from the normal RLM mode to the relaxed RLM mode; further, the present example may further include:

step 74: and under the condition that the terminal equipment adopts the relaxed RLM mode, if the sixth RLM conversion condition is met, determining to switch from the relaxed RLM mode to the normal RLM mode.

The sixth RLM transition condition includes: the counted value of the out-of-step indication continuously received by the RRC layer of the terminal equipment exceeds a sixth quantity threshold value, and the time interval of the adjacent out-of-step indication is not more than a fourth duration.

That is, when the terminal device performs link detection in the relaxed RLM mode, if the RRC layer receives N3 consecutive "Out-of-sync" indications and the time interval between every two adjacent "Out-of-sync" indications does not exceed L1, the terminal device enters the normal RLM mode and indicates to the physical layer to enable the request of the normal RLM.

When the terminal equipment enters a relaxed RLM mode, the RRC layer of the terminal equipment instructs the physical layer to perform link detection by using a measurement requirement corresponding to the relaxed RLM mode.

if the eleventh condition is met, the terminal equipment adds one to the count value of the step-out indication;

The eleventh condition includes at least one of:

and under the condition that the terminal equipment is in a relaxed RLM mode and the fourth timer is in an operation state, the RRC layer of the terminal equipment receives the out-of-step indication of the physical layer. That is, if the RRC layer of the terminal device receives 1 "out-of-sync indication from the physical layer under the condition that the terminal device is in the relaxed RLM mode and the fourth timer L2 is running, the count value (n3_counter) of the out-of-sync indication is added by 1.

And under the conditions that the terminal equipment is in a relaxed RLM mode, the fourth timer is not operated, and the count value of the synchronization indication is 0, the RRC layer of the terminal equipment receives the out-of-synchronization indication of the physical layer. That is, in the case where the terminal device is in the normal RLM mode, the count value (n3_counter) of the out-of-step indication is 0 and the fourth timer L2 is not running, if the RRC layer of the terminal device receives 1 out-of-sync out-of-step indication from the physical layer, the count value (n3_counter) of the out-of-step indication is self-incremented by 1.

If the twelfth condition is met, the terminal equipment resets according to the count value of the step-out indication;

The twelfth condition includes at least one of:

the terminal equipment receives the synchronization instruction;

the terminal equipment initializes an RRC connection reconfiguration process;

the fourth timer times out.

Likewise, the present example adds processing for initialization, reset, or stop of the fourth timer, specifically:

The terminal device starts or restarts the fourth timer when the following conditions are satisfied: and under the condition that the terminal equipment is in a relaxed RLM mode, the RRC layer of the terminal equipment receives the out-of-step indication of the physical layer.

The terminal device stops the fourth timer when at least one of the following conditions is satisfied:

the RRC layer of the terminal equipment receives the synchronization instruction of the physical layer under the condition that the terminal equipment is in a loose RLM mode and a fourth timer is in a running period;

or the terminal device switches from a relaxed RLM mode to a normal RLM mode.

In one example, the processing of the count value of the fourth timer and the step-out indication may include: if the terminal equipment enters a relaxed RLM mode, resetting the count value of the step-out indication to 0;

When the step-out indication is received, adding 1 to a count value of the step-out indication, and initializing a fourth timer;

Then, if the step-out indication is received during the fourth timer operation, continuously incrementing a count value of the step-out indication by 1, and resetting the fourth timer; if the count value of the continuously received out-of-step indication reaches the sixth number threshold value and none of the fourth timers has timed out, that is, the sixth RLM transition condition is satisfied, it may be determined to transition to the normal RLM mode while the second timer is stopped. Otherwise, the terminal device remains in the normal RLM mode.

To complete the entire flow of the present example so far, the present example is described with reference to fig. 8, and it can be seen from fig. 8 that the measurement interval of the normal RLM mode is smaller than that of the relaxed RLM mode; solid arrows in the figure indicate synchronous indications, and broken arrows indicate out-of-step indications; the fifth number threshold may be M3 assumed to be equal to 8, the sixth number threshold may be N3 assumed to be equal to 4, and the third timer (L1) and the fourth timer (L2) are configured. Specific:

After entering a normal RLM mode, when the RRC layer receives a first synchronous instruction, adding 1 to the count value of the synchronous instruction, starting a third timer (L1) at the same time, receiving an out-of-step instruction, stopping the third timer, and resetting the count value of the synchronous instruction to 0; after that, 8 synchronization instructions are continuously received, the count value of the synchronization instructions reaches 8, namely, a fifth quantity threshold value (called M3) configured by the network equipment, and the time interval between two adjacent synchronization instructions does not exceed the duration of a third timer (L1), so that the entering of a loose RLM mode is determined, and meanwhile, T1 is stopped;

In the figure, after the terminal equipment enters a relaxed RLM mode, the count value of the step-out indication can be initialized to 0; upon receiving the first out-of-step indication, a count value of the out-of-step indication may be incremented by 1 and a fourth timer (L2) started; then continuously receiving two synchronization indications, resetting the count value of the out-of-step indication to 0, and stopping a fourth timer (L2); then, 4 out-of-step indications are continuously received, it is determined that the count value of the out-of-step indications is continuously increased by 1, after the processing of increasing the count value by 1 for 4 times is performed, the count value of the out-of-step indications reaches a fourth number threshold value (N3), and the time interval between two adjacent out-of-step indications does not exceed the duration of a fourth timer (L2), it is determined that the RLM mode is shifted from the relaxed RLM mode to the normal RLM mode, and the fourth timer (L2) is stopped.

The RLM mode switching condition in this example is more strict, and when the synchronization indication is continuously received and the time interval between adjacent synchronization indications does not exceed the third duration, the future channel is considered to be continuously maintained in a good state, so that the terminal can save power and perform relaxation measurement without having too much influence on the radio link failure. And when the step-out indication is continuously received and the time interval between adjacent step-out indications is not longer than the fourth time length, the future channel is considered to continuously maintain a poor state, the random factors of good channel in the individual time intervals are eliminated, and the normal measurement state is returned, so that the failure of too late detection of the radio link is avoided.

Finally, it should be noted that the foregoing examples 2 and 3 may be used separately or in combination, for example, in one example, the determining, by the terminal device, a transition between different RLM modes according to RLM transition conditions includes:

If the terminal equipment adopts the normal RLM mode, if the third RLM conversion condition and the fourth RLM conversion condition are met, determining to switch from the normal RLM mode to the relaxed RLM mode;

Or alternatively

And under the condition that the terminal equipment adopts the relaxed RLM mode, if the sixth RLM conversion condition of the fifth RLM conversion condition is met, determining to switch from the relaxed RLM mode to the normal RLM mode.

That is, the transition to the relaxed RLM mode, the third RLM transition condition and the fourth RLM transition condition described in the above-described example 2 and example 3 need to be satisfied, may be understood that the terminal device needs to: in the first duration, the count value of the synchronization instruction continuously received by the terminal equipment exceeds a third quantity threshold value; that is, the RRC layer only receives the "in-sync" synchronization indication within a period of time, and the number of "in-sync" synchronization indications is greater than the third number threshold (M2); and the count value of the continuously received synchronization indications exceeds a fifth number threshold value, and the time interval of the adjacent synchronization indications is not greater than the third duration. The measurement unit of the time interval may be an indication period (indication Period), that is, the RRC layer receives consecutive M3 (the fifth number of threshold values) "in-sync" indications, and adjacent "in-sync" synchronization indications differ by no more than L1 pieces indication period.

In this case, the third number threshold value and the fifth number threshold value may be the same.

The contents of the specific third RLM conversion condition and the fourth RLM conversion condition are the same as those in the foregoing examples, and are not described here again.

The transition to the normal RLM mode, which requires satisfaction of the fifth RLM transition condition and the sixth RLM transition condition in the above-described example 2 and example 3, can be understood as:

and the terminal equipment needs to be in the second time period, and the count value of the step-out indication continuously received by the terminal equipment exceeds a fourth quantity threshold value. That is, the RRC layer receives only "out-of-sync indications for a period of time, and the number of" out-of-sync indications is greater than a fourth number threshold (N2), and at the same time, the count value of out-of-sync indications that the terminal device continuously receives is required to exceed a sixth number threshold, and the time interval of adjacent out-of-sync indications is not greater than a fourth duration. Wherein the measure of the time interval may be an indication period (indication Period), that is, the RRC layer receives consecutive N3 (sixth number of threshold) out-of-sync indications, and adjacent out-of-sync indications differ by no more than L2 indication period.

In this case, the fourth number threshold and the sixth number threshold may be the same.

Further, descriptions of the fifth and sixth RLM transition conditions are the same as those of the foregoing examples, and will not be repeated.

In the process of combining the above examples 2 and 3, the condition of RLM mode switching is more strict, and when the synchronization indication is continuously received within a certain period of time and the time interval between adjacent synchronization indications does not exceed a certain period of time interval, the future channel is considered to continuously maintain a good state, so that the terminal can save power to perform relaxation measurement without having too much influence on radio link failure. And when the step-out indication is continuously received and the time interval between adjacent step-out indications is not longer than the fourth time length, the future channel is considered to continuously maintain a poor state, the random factors of good channel in the individual time intervals are eliminated, and the normal measurement state is returned, so that the failure of too late detection of the radio link is avoided.

It can be seen that by adopting the above scheme, it is possible to determine to switch between the normal RLM mode and the relaxed RLM mode according to the RLM switching condition, the specific RLM switching condition being associated with the count value of the synchronization instruction or the out-of-synchronization instruction. Thus, it is defined how to enter the relaxed RLM mode after the relaxed RLM mode is introduced.

An embodiment of the present invention provides a terminal device, as shown in fig. 9, including:

A processing unit 91 determining a transition between different RLM modes according to RLM transition conditions;

wherein, the RLM transition condition is at least related to a count value of a synchronization instruction or a step-out instruction continuously received by a radio resource control RRC layer of the terminal device;

EXAMPLE 1,

In this example, the first RLM transition condition includes: the counting value of the synchronous indication continuously received by the RRC layer of the terminal equipment exceeds a first quantity threshold value;

Correspondingly, the processing unit 91 determines to switch from the normal RLM mode to the relaxed RLM mode if the first RLM switching condition is satisfied in the case of performing link detection using the normal RLM mode;

Or alternatively

The present example is described in a scenario in which a network device configures a terminal device through RRC information:

As shown in fig. 10, the terminal device further includes: a communication unit 92 configured to receive an RRC reconfiguration message of the network device;

In particular, the RRC reconfiguration message may include at least one of:

The processing unit 91, based on the network configuration, the terminal device defaults to the normal RLM mode.

The processing unit 91 determines to switch from the normal RLM mode to the relaxed RLM mode if the first RLM switching condition is satisfied in the case of performing link detection using the normal RLM mode.

The first RLM transition condition includes: the counted value of the synchronization indication continuously received by the RRC layer of the terminal equipment exceeds a first quantity threshold value.

Further, when entering the normal RLM mode, the processing unit 91 instructs the physical layer to perform link detection by using the measurement requirement corresponding to the normal RLM mode by the RRC layer of the terminal device.

The process of counting the count value of the synchronization instruction may include initializing or resetting the count value of the synchronization instruction and adding one to the count value of the synchronization instruction. The concrete explanation is as follows:

The processing unit 91 adds one to the count value of the synchronization instruction if the first condition is satisfied; the first condition includes: and under the condition that the terminal equipment is in the normal RLM mode, the RRC layer receives the synchronization instruction of the physical layer.

The processing unit 91 initializes or resets the count value of the synchronization instruction if the second condition is satisfied;

the second condition includes at least one of:

The terminal equipment enters a normal RLM mode;

The terminal equipment receives the step-out indication;

The terminal device initiates an RRC connection reconfiguration procedure.

The terminal device may switch from the normal RLM mode to the relaxed RLM mode; further, the present example may further include:

The processing unit 91 determines to switch from the relaxed RLM mode to the normal RLM mode if the second RLM switching condition is satisfied in the case of performing link detection using the relaxed RLM mode.

When entering the relaxed RLM mode, the processing unit 91 instructs the physical layer to perform link detection by using the measurement requirements corresponding to the relaxed RLM mode.

The process of counting the count value of the out-of-step indication may include initializing or resetting the count value of the out-of-step indication and adding one to the count value of the out-of-step indication. The concrete explanation is as follows:

A processing unit 91, if the third condition is satisfied, the terminal device increments a count value of the step-out indication; the third condition includes: and under the condition that the terminal equipment is in a relaxed RLM mode, the RRC layer of the terminal equipment receives the out-of-step indication of the physical layer.

A processing unit 91, if the fourth condition is satisfied, the terminal device initializes or resets the count value of the step-out instruction;

the fourth condition includes at least one of:

The terminal device initiates an RRC connection reconfiguration procedure.

EXAMPLE 2,

The third RLM transition condition includes: within the first duration, the counted value of the synchronization instruction continuously received by the RRC layer of the terminal equipment exceeds a third quantity threshold value; that is, the RRC layer receives only the "in-sync" synchronization indication for a period of time, and the number of "in-sync" synchronization indications is greater than the third number threshold (M2).

The fifth RLM transition condition includes: and in the second time period, the counted value of the out-of-step indication continuously received by the RRC layer of the terminal equipment exceeds a fourth quantity threshold value. That is, the RRC layer receives only the "out-of-sync indication for a period of time, and the number of" out-of-sync indications is greater than a fourth number threshold (N2).

Accordingly, in the case of adopting the normal RLM mode, the processing unit 91 determines to switch from the normal RLM mode to the relaxed RLM mode if the third RLM switching condition is satisfied;

The scenario in which the network device performs the configuration of the first duration, the second duration, the third quantity threshold value, and the fourth quantity threshold value by using RRC information as the terminal device is described in this example:

a communication unit 92 that receives an RRC reconfiguration message of the network device;

In particular, the RRC reconfiguration message may include at least one of:

And a processing unit 91, in the case that the terminal device adopts the normal RLM mode, determining to switch from the normal RLM mode to the relaxed RLM mode if the third RLM switching condition is satisfied.

A processing unit 91, if the fifth condition is satisfied, the terminal device increments the count value of the synchronization instruction by one;

the fifth condition includes at least one of:

A processing unit 91, if the sixth condition is satisfied, the terminal device initializes or resets the count value of the synchronization instruction;

the sixth condition includes at least one of:

The terminal equipment enters a normal RLM mode;

The terminal equipment receives the step-out indication;

the terminal equipment initializes an RRC connection reconfiguration process;

The first timer times out.

The present example increases the timing duration of the first timer and the second timer, and in the normal RLM mode, if the synchronization instruction is received, the first timer may be run, and the processing manner for stopping the first timer may include:

The processing unit 91 stops the first timer when the following condition is satisfied:

In a normal RLM mode, and under the condition that the first timer is in a running period, the RRC layer of the terminal device receives an out-of-step indication of the physical layer;

Or from a normal RLM mode to a relaxed RLM mode.

The processing manner related to starting or restarting the first timer may include: the processing unit 91 starts or restarts the first timer when the following condition is satisfied: and under the condition that the terminal equipment is in a normal RLM mode and the count value of the synchronization indication is 0, the RRC layer of the terminal equipment receives the synchronization indication of the physical layer.

The processing unit 91 determines to switch from the relaxed RLM mode to the normal RLM mode if the fifth RLM switching condition is satisfied in the case where the relaxed RLM mode is employed.

The fifth RLM transition condition includes: and in the second time period, the counted value of the out-of-step indication continuously received by the RRC layer of the terminal equipment exceeds a fourth quantity threshold value.

The process of counting the count value of the out-of-step instruction may include initializing or resetting the count value of the out-of-step instruction and adding one to the count value of the out-of-step instruction. The concrete explanation is as follows:

The processing unit 91, if the seventh condition is satisfied, the terminal device increments the count value of the step-out instruction by one:

the seventh condition includes at least one of:

the RRC layer of the terminal equipment receives an out-of-step indication of the physical layer under the condition that the terminal equipment is in a relaxed RLM mode and the second timer is in a running period;

Or under the conditions that the terminal equipment is in a relaxed RLM mode, the second timer is not operated, and the count value of the synchronization indication is 0, the RRC layer of the terminal equipment receives the out-of-synchronization indication of the physical layer.

The processing unit 91 resets the count value of the step-out instruction if the eighth condition is satisfied;

the eighth condition includes at least one of:

the terminal equipment receives the synchronization instruction;

the terminal equipment initializes an RRC connection reconfiguration process;

The second timer times out.

This example adds processing for initialization, reset or stop of the second timer, in particular:

The processing unit 91 starts or restarts the second timer when the following condition is satisfied: and under the condition that the terminal equipment is in a loose RLM mode and the count value of the out-of-step indication is 0, the RRC layer of the terminal equipment receives the out-of-step indication of the physical layer.

The processing unit 91 stops the second timer when the following condition is satisfied:

or the terminal device switches from a relaxed RLM mode to a normal RLM mode.

EXAMPLE 3,

The fourth RLM transition condition includes: the counted value of the synchronization indications continuously received by the RRC layer of the terminal equipment exceeds a fifth quantity threshold value, and the time interval of the adjacent synchronization indications is not more than a third duration. The measurement unit of the time interval may be an indication period (indication Period), that is, the RRC layer receives consecutive M3 (the fifth number of threshold values) "in-sync" indications, and adjacent "in-sync" synchronization indications differ by no more than L1 pieces indication period.

The sixth RLM transition condition includes: the counted value of the out-of-step indication continuously received by the RRC layer of the terminal equipment exceeds a sixth quantity threshold value, and the time interval of the adjacent out-of-step indication is not more than a fourth duration. Wherein the measure of the time interval may be an indication period (indication Period), that is, the RRC layer receives consecutive N3 (sixth number of threshold) out-of-sync indications, and adjacent out-of-sync indications differ by no more than L2 indication period.

Accordingly, in the case of adopting the normal RLM mode, the processing unit 91 determines to switch from the normal RLM mode to the relaxed RLM mode if the fourth RLM switching condition is satisfied;

or in the case of the relaxed RLM mode, if the sixth RLM transition condition is satisfied, it is determined to switch from the relaxed RLM mode to the normal RLM mode.

The scenario in which the network device performs the configuration of the third duration, the fourth duration, the fifth quantity threshold value, and the sixth quantity threshold value by using RRC information as the terminal device is described in this example:

In particular, the RRC reconfiguration message may include at least one of:

The processing unit 91 determines to switch from the normal RLM mode to the relaxed RLM mode if the fourth RLM switching condition is satisfied in the case of using the normal RLM mode.

A processing unit 91, if the ninth condition is satisfied, the terminal device increments a count value of the synchronization instruction by one;

the ninth condition includes at least one of:

A processing unit 91, if the tenth condition is satisfied, the terminal device initializes or resets the count value of the synchronization instruction;

Wherein the tenth condition includes at least one of:

The terminal equipment enters a normal RLM mode;

The terminal equipment receives the step-out indication;

the terminal equipment initializes an RRC connection reconfiguration process;

The third timer (L1) times out.

The processing unit 91 starts or restarts the third timer when the following condition is satisfied: and under the condition that the terminal equipment is in a normal RLM mode, the RRC layer of the terminal equipment receives the synchronization instruction of the physical layer.

The processing unit 91 stops the third timer when at least one of the following conditions is satisfied:

The processing unit 91 determines to switch from the relaxed RLM mode to the normal RLM mode if the sixth RLM switching condition is satisfied in the case where the relaxed RLM mode is employed.

a processing unit 91, if the eleventh condition is satisfied, the terminal device increments a count value of the step-out instruction by one;

The eleventh condition includes at least one of:

And under the condition that the terminal equipment is in a relaxed RLM mode and the fourth timer is in an operation state, the RRC layer of the terminal equipment receives the out-of-step indication of the physical layer. And under the conditions that the terminal equipment is in a relaxed RLM mode, the fourth timer is not operated, and the count value of the synchronization indication is 0, the RRC layer of the terminal equipment receives the out-of-synchronization indication of the physical layer.

A processing unit 91, if the twelfth condition is satisfied, the terminal device resets according to the count value of the step-out instruction;

The twelfth condition includes at least one of:

the terminal equipment receives the synchronization instruction;

the terminal equipment initializes an RRC connection reconfiguration process;

the fourth timer times out.

The processing unit 91 starts or restarts the fourth timer when the following condition is satisfied: and under the condition that the terminal equipment is in a relaxed RLM mode, the RRC layer of the terminal equipment receives the out-of-step indication of the physical layer.

The processing unit 91 stops the fourth timer when at least one of the following conditions is satisfied:

Or the terminal equipment is put by

Finally, it should be noted that examples 2 and 3 may be used separately or in combination, for example, in one example, the processing unit 91 determines, according to RLM transition conditions, transitions between different RLM modes, including:

Or alternatively

Fig. 11 is a schematic block diagram of a communication device 1400 provided in an embodiment of the present invention, where the communication device in this embodiment may be specifically a terminal device or a network device in the foregoing embodiment. The communication device 1400 shown in fig. 11 includes a processor 1410, and the processor 1410 may call and run a computer program from a memory to implement the method in the embodiment of the present invention.

Optionally, as shown in fig. 11, the communication device 1400 may also include a memory 1420. Wherein the processor 1410 may invoke and run a computer program from the memory 1420 to implement the method in the embodiments of the present invention.

Wherein the memory 1420 may be a separate device from the processor 1410 or may be integrated into the processor 1410.

Optionally, as shown in fig. 11, the communication device 1400 may further include a transceiver 1430, and the processor 1410 may control the transceiver 1430 to communicate with other devices, and in particular, may send information or data to other devices or receive information or data sent by other devices.

Wherein the transceiver 1430 may include a transmitter and a receiver. The transceiver 1430 may further include an antenna, the number of which may be one or more.

Optionally, the communication device 1400 may be a corresponding flow implemented by a terminal device or a network device in the embodiment of the present invention, which is not described herein for brevity.

Fig. 12 is a schematic structural diagram of a chip of an embodiment of the present invention. The chip 1500 shown in fig. 12 includes a processor 1510, and the processor 1510 may call and execute a computer program from memory to implement the method in an embodiment of the present invention.

Optionally, as shown in fig. 12, the chip 1500 may further include a memory 1520. Wherein the processor 1510 may invoke and run a computer program from the memory 1520 to implement the method in embodiments of the present invention.

Wherein the memory 1520 may be a separate device from the processor 1510 or may be integrated into the processor 1510.

Optionally, the chip 1500 may also include an input interface 1530. Wherein the processor 1510 may control the input interface 1530 to communicate with other devices or chips, and in particular, may obtain information or data sent by other devices or chips.

Optionally, the chip 1500 may also include an output interface 1540. Wherein the processor 1510 may control the output interface 1540 to communicate with other devices or chips, and in particular may output information or data to other devices or chips.

Optionally, the chip may be applied to a corresponding flow implemented by the terminal device or the network device in the embodiment of the present invention, which is not described herein for brevity.

It should be understood that the chips referred to in the embodiments of the present invention may also be referred to as system-on-chip chips, or the like.

It should be appreciated that the processor of an embodiment of the present invention may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The Processor may be a general purpose Processor, a digital signal Processor (DIGITAL SIGNAL Processor, DSP), an Application SPECIFIC INTEGRATED Circuit (ASIC), an off-the-shelf programmable gate array (Field Programmable GATE ARRAY, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.

It will be appreciated that the memory in embodiments of the invention may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be appreciated that the above memory is exemplary and not limiting, and for example, the memory in the embodiments of the present invention may be static random access memory (STATIC RAM, SRAM), dynamic random access memory (DYNAMIC RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (double DATA RATE SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous connection dynamic random access memory (SYNCH LINK DRAM, SLDRAM), direct Rambus RAM (DR RAM), and the like. That is, the memory in embodiments of the present invention is intended to comprise, without being limited to, these and any other suitable types of memory.

Fig. 13 is a schematic block diagram of a communication system 1600 provided by an embodiment of the present application. As shown in fig. 13, the communication system 1600 includes a network device 1620 and a terminal device 1610.

The network device 1620 may be configured to implement the corresponding functions implemented by the communication device in the above method, and the terminal device 1610 may be configured to implement the corresponding functions implemented by the terminal in the above method, which are not described herein for brevity.

The embodiment of the invention also provides a computer readable storage medium for storing a computer program.

Optionally, the computer readable storage medium may be applied to a network device or a satellite or a terminal device in the embodiment of the present invention, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method of the embodiment of the present invention, which is not described herein for brevity.

The embodiment of the invention also provides a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to a network device or a satellite or a terminal device in the embodiment of the present invention, and the computer program instructions cause a computer to execute a corresponding flow implemented by the network device in each method of the embodiment of the present invention, which is not described herein for brevity.

The embodiment of the invention also provides a computer program.

Optionally, the computer program may be applied to a network device or a satellite or a terminal device in the embodiment of the present invention, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the network device in each method in the embodiment of the present invention, which is not described herein for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A radio link monitoring, RLM, mode conversion method, comprising:

the RLM mode includes: a normal RLM mode and a relaxed RLM mode, the normal RLM mode having a measurement interval smaller than a measurement interval of the relaxed RLM mode; when discontinuous reception, DRX, is configured, the measurement interval is a maximum of 10ms, a minimum RLM reference signal period, and a DRX period.

2. The method of claim 1, wherein the terminal device determining transitions between different RLM modes according to RLM transition conditions, comprises:

Or alternatively

3. The method of claim 2, wherein,

The first RLM transition condition includes: the count value of the synchronization instruction continuously received by the terminal equipment exceeds a first quantity threshold value;

4. A method according to claim 3, wherein the first and second quantity threshold values are preset or configured for a network device.

5. A method according to claim 3, wherein the method further comprises:

if the first condition is met, the terminal equipment adds one to the count value of the synchronous indication;

the first condition includes: and under the condition that the terminal equipment is in a normal RLM mode, the RRC layer of the terminal equipment receives the synchronization instruction of the physical layer.

6. The method of claim 5, wherein the method further comprises:

the second condition includes at least one of:

The terminal equipment enters a normal RLM mode;

The terminal equipment receives the step-out indication;

The terminal device initiates an RRC connection reconfiguration procedure.

7. A method according to claim 3, wherein the method further comprises:

if the third condition is met, the terminal equipment adds one to the count value of the step-out indication;

The third condition includes: and under the condition that the terminal equipment is in a relaxed RLM mode, the RRC layer of the terminal equipment receives the out-of-step indication of the physical layer.

8. The method of claim 7, wherein the method further comprises:

the fourth condition includes at least one of:

the terminal equipment receives the synchronization instruction;

The terminal device initiates an RRC connection reconfiguration procedure.

9. The method of claim 1, wherein the terminal device determining transitions between different RLM modes according to RLM transition conditions, comprises:

If the terminal equipment adopts the normal RLM mode, if the third RLM conversion condition and/or the fourth RLM conversion condition are met, determining to switch from the normal RLM mode to the relaxed RLM mode;

Or alternatively

And under the condition that the terminal equipment adopts the relaxed RLM mode, if the fifth RLM conversion condition and/or the sixth RLM conversion condition are/is met, determining to switch from the relaxed RLM mode to the normal RLM mode.

10. The method of claim 9, wherein,

The third RLM transition condition includes: in the first duration, the count value of the synchronization instruction continuously received by the terminal equipment exceeds a third quantity threshold value;

11. The method of claim 10, wherein the first duration, the second duration, the third quantity threshold, the fourth quantity threshold are preset, or configured for a network device.

12. The method of claim 11, wherein the first duration is a timing duration of a first timer and the second duration is a timing duration of a second timer.

13. The method of claim 12, wherein the method further comprises:

the fifth condition includes at least one of:

14. The method of claim 13, wherein the method further comprises:

the sixth condition includes at least one of:

The terminal equipment enters a normal RLM mode;

The terminal equipment receives the step-out indication;

the terminal equipment initializes an RRC connection reconfiguration process;

The first timer times out.

15. The method of claim 12, wherein the method further comprises:

the seventh condition includes at least one of:

And under the conditions that the terminal equipment is in a relaxed RLM mode, the second timer is not operated, and the count value of the synchronization indication is 0, the RRC layer of the terminal equipment receives the out-of-synchronization indication of the physical layer.

16. The method of claim 15, wherein the method further comprises:

the eighth condition includes at least one of:

the terminal equipment receives the synchronization instruction;

the terminal equipment initializes an RRC connection reconfiguration process;

The second timer times out.

17. The method of claim 12, wherein the method further comprises:

the terminal device starts or restarts the first timer when the following condition is satisfied: and under the condition that the terminal equipment is in a normal RLM mode and the count value of the synchronization indication is 0, the RRC layer of the terminal equipment receives the synchronization indication of the physical layer.

18. The method of claim 17, wherein the method further comprises:

Under the condition that the terminal equipment is in a normal RLM mode and the first timer is in a running period, the RRC layer of the terminal equipment receives an out-of-step indication of the physical layer;

19. The method of claim 12, wherein the method further comprises:

The terminal device starts or restarts the second timer when the following condition is satisfied: and under the condition that the terminal equipment is in a loose RLM mode and the count value of the out-of-step indication is 0, the RRC layer of the terminal equipment receives the out-of-step indication of the physical layer.

20. The method of claim 19, wherein the method further comprises:

or the terminal device switches from a relaxed RLM mode to a normal RLM mode.

21. The method of claim 9, wherein,

The fourth RLM transition condition includes: the count value of the synchronization instructions continuously received by the terminal equipment exceeds a fifth quantity threshold value, and the time interval of adjacent synchronization instructions is not more than a third duration;

The sixth RLM transition condition includes: and the count value of the step-out indication continuously received by the terminal equipment exceeds a sixth quantity threshold value, and the time interval of the adjacent step-out indication is not more than a fourth duration.

22. The method of claim 21, wherein the third duration, fourth duration, fifth quantity threshold, sixth quantity threshold, are preset, or configured for a network device.

23. The method of claim 22, wherein the third duration is a timing duration of a third timer and the fourth duration is a timing duration of a fourth timer.

24. The method of claim 23, wherein the method further comprises:

the ninth condition includes at least one of:

25. The method of claim 24, wherein the method further comprises:

Wherein the tenth condition includes at least one of:

The terminal equipment enters a normal RLM mode;

The terminal equipment receives the step-out indication;

the terminal equipment initializes an RRC connection reconfiguration process;

The third timer times out.

26. The method of claim 23, wherein the method further comprises:

The eleventh condition includes at least one of:

The RRC layer of the terminal equipment receives the out-of-step indication of the physical layer under the condition that the terminal equipment is in a relaxed RLM mode and the fourth timer is in an operation state;

And under the conditions that the terminal equipment is in a relaxed RLM mode, the fourth timer is not operated, and the count value of the synchronization indication is 0, the RRC layer of the terminal equipment receives the out-of-synchronization indication of the physical layer.

27. The method of claim 26, wherein the method further comprises:

The twelfth condition includes at least one of:

the terminal equipment receives the synchronization instruction;

the terminal equipment initializes an RRC connection reconfiguration process;

the fourth timer times out.

28. The method of claim 23, wherein the method further comprises:

29. The method of claim 28, wherein the method further comprises:

30. The method of claim 23, wherein the method further comprises:

31. The method of claim 30, wherein the method further comprises:

or the terminal device switches from a relaxed RLM mode to a normal RLM mode.

32. The method of any one of claims 1-31, wherein the method further comprises:

When the terminal equipment enters a normal RLM mode, an RRC layer of the terminal equipment indicates a physical layer to adopt a measurement requirement corresponding to the normal RLM mode for link detection;

Or alternatively

When the terminal equipment enters a relaxed RLM mode, an RRC layer of the terminal equipment instructs a physical layer to adopt a measurement requirement corresponding to the relaxed RLM mode to carry out link detection;

Wherein the measurement requirements corresponding to the normal RLM mode and the measurement requirements corresponding to the relaxed RLM mode differ at least in measurement interval.

33. A terminal device, comprising:

34. The terminal device of claim 33, wherein the processing unit determines to switch from the normal RLM mode to the relaxed RLM mode if the first RLM switching condition is satisfied in the case of link detection using the normal RLM mode;

Or alternatively

In the case of link detection using the relaxed RLM mode, if the second RLM transition condition is satisfied, it is determined to switch from the relaxed RLM mode to the normal RLM mode.

35. The terminal device of claim 34, wherein,

The first RLM transition condition includes: continuously received synchronization indication count values exceed a first quantity threshold value;

the second RLM transition condition includes: the count value of the continuously received out-of-step indication exceeds a second number threshold value.

36. The terminal device of claim 35, wherein the first and second quantity threshold values are preset or configured for a network device.

37. The terminal device of claim 35, wherein the processing unit,

If the first condition is met, adding one to the count value of the synchronous indication;

the first condition includes: in the normal RLM mode, the RRC layer receives a synchronization indication of the physical layer.

38. The terminal device according to claim 37, wherein the processing unit initializes or resets a count value of the synchronization instruction if the second condition is satisfied;

the second condition includes at least one of:

entering a normal RLM mode;

Receiving an out-of-step indication;

Receiving RRC reconfiguration information containing synchronous reconfiguration of the cell group;

an RRC connection reconfiguration procedure is initialized.

39. The terminal device of claim 35, wherein the processing unit increments a count value of the out-of-step indication if a third condition is satisfied;

The third condition includes: in the relaxed RLM mode, the RRC layer receives an out-of-sync indication from the physical layer.

40. The terminal device according to claim 39, wherein the processing unit initializes or resets a count value of the out-of-step indication if a fourth condition is satisfied;

the fourth condition includes at least one of:

Switching from the normal RLM mode to the relaxed RLM mode;

Receiving a synchronization instruction;

an RRC connection reconfiguration procedure is initialized.

41. The terminal device of claim 33, wherein the processing unit, in case of employing a normal RLM mode, determines to switch from the normal RLM mode to a relaxed RLM mode if a third RLM switching condition and/or a fourth RLM switching condition is met;

or in the case of using the relaxed RLM mode, if the fifth RLM transition condition and/or the sixth RLM transition condition is satisfied, it is determined to switch from the relaxed RLM mode to the normal RLM mode.

42. The terminal device of claim 41, wherein,

The third RLM transition condition includes: continuously received count values of the synchronization indications exceed a third quantity threshold value within the first duration;

the fifth RLM transition condition includes: and in the second time period, the count value of the continuously received step-out indication exceeds a fourth quantity threshold value.

43. The terminal device of claim 42, wherein the first duration, the second duration, the third quantity threshold, the fourth quantity threshold are preset, or configured for a network device.

44. A terminal device as defined in claim 43, wherein the first duration is a timing duration of a first timer and the second duration is a timing duration of a second timer.

45. The terminal device of claim 44, wherein the processing unit increments a count value of the synchronization indication if a fifth condition is satisfied;

the fifth condition includes at least one of:

Under the condition that the first timer is in a normal RLM mode and the first timer is in an operation state, the RRC layer receives a synchronization instruction of the physical layer;

In the normal RLM mode, when the first timer is not running, and when the count value of the synchronization indication is 0, the RRC layer receives the synchronization indication of the physical layer.

46. The terminal device according to claim 35, wherein the processing unit initializes or resets a count value of the synchronization instruction if a sixth condition is satisfied;

the sixth condition includes at least one of:

entering a normal RLM mode;

Receiving an out-of-step indication;

Initializing an RRC connection reconfiguration process;

The first timer times out.

47. The terminal device of claim 44, wherein the processing unit, if the seventh condition is met, increments a count value of the out-of-step indication by one:

the seventh condition includes at least one of:

in a relaxed RLM mode, and with the second timer running, the RRC layer receives an out-of-sync indication of the physical layer;

In the case of the relaxed RLM mode, the second timer not running, and the count value of the synchronization indication being 0, the RRC layer receives an out-of-sync indication of the physical layer.

48. The terminal device of claim 47, wherein the processing unit resets a count value of the out-of-step indication if an eighth condition is satisfied;

the eighth condition includes at least one of:

Switching from the normal RLM mode to the relaxed RLM mode;

Receiving a synchronization instruction;

Initializing an RRC connection reconfiguration process;

The second timer times out.

49. The terminal device of claim 44, wherein the processing unit starts or restarts the first timer when: in the normal RLM mode, and when the count value of the synchronization instruction is 0, the RRC layer receives the synchronization instruction of the physical layer.

50. The terminal device of claim 49, wherein the processing unit stops the first timer when:

In a normal RLM mode, and with the first timer during operation, the RRC layer receives an out-of-sync indication of the physical layer;

Or from a normal RLM mode to a relaxed RLM mode.

51. The terminal device of claim 44, wherein the processing unit starts or restarts the second timer when: in the case where the RLM mode is relaxed and the count value of the out-of-sync indication is 0, the RRC layer receives the out-of-sync indication of the physical layer.

52. The terminal device of claim 51, wherein the processing unit stops the second timer when:

in a relaxed RLM mode, and with the second timer during operation, the RRC layer receives a synchronization indication of the physical layer;

or from a relaxed RLM mode to a normal RLM mode.

53. The terminal device of claim 41, wherein,

The fourth RLM transition condition includes: the count value of the continuously received synchronization instruction exceeds a fifth quantity threshold value, and the time interval of the adjacent synchronization instruction is not more than a third duration;

the sixth RLM transition condition includes: the count value of the continuously received out-of-step indications exceeds a sixth number threshold, and the time interval of adjacent out-of-step indications is not greater than a fourth duration.

54. The terminal device of claim 53, wherein the third duration, fourth duration, fifth number threshold, sixth number threshold are preset or configured for a network device.

55. The terminal device of claim 54, wherein the third duration is a timing duration of a third timer and the fourth duration is a timing duration of a fourth timer.

56. The terminal device of claim 55, wherein the processing unit increments a count value of the synchronization indication if a ninth condition is satisfied;

the ninth condition includes at least one of:

The RRC layer receives a synchronization instruction of the physical layer under the condition that the radio link controller is in a normal RLM mode and the third timer is in an operation state;

in the normal RLM mode, the third timer is not running, and the count value of the synchronization indication is 0, the RRC layer receives the synchronization indication of the physical layer.

57. The terminal device of claim 56, wherein the processing unit initializes or resets a count value of the synchronization instruction if a tenth condition is satisfied;

Wherein the tenth condition includes at least one of:

entering a normal RLM mode;

Receiving an out-of-step indication;

Initializing an RRC connection reconfiguration process;

The third timer times out.

58. The terminal device of claim 55, wherein the processing unit increments a count value of the out-of-step indication if an eleventh condition is satisfied;

The eleventh condition includes at least one of:

In a relaxed RLM mode, and with the fourth timer in an operational state, the RRC layer receives an out-of-sync indication of the physical layer;

In the case of the relaxed RLM mode, the fourth timer not running, and the count value of the synchronization indication being 0, the RRC layer receives an out-of-sync indication of the physical layer.

59. The terminal device of claim 58, wherein the processing unit resets the count value according to the out-of-sync indication if a twelfth condition is satisfied;

The twelfth condition includes at least one of:

Switching from the normal RLM mode to the relaxed RLM mode;

Receiving a synchronization instruction;

Initializing an RRC connection reconfiguration process;

the fourth timer times out.

60. The terminal device of claim 55, wherein the processing unit starts or restarts the third timer when: in the normal RLM mode, the RRC layer receives a synchronization indication of the physical layer.

61. The terminal device of claim 59, wherein the processing unit stops the third timer when at least one of the following conditions is met:

under the condition that the RRC layer is in a normal RLM mode and the third timer is in an operation state, the RRC layer receives an out-of-step indication of the physical layer;

Or from a normal RLM mode to a relaxed RLM mode.

62. The terminal device of claim 55, wherein the processing unit starts or restarts the fourth timer when: in the relaxed RLM mode, the RRC layer receives an out-of-sync indication from the physical layer.

63. The terminal device of claim 62, wherein the processing unit stops the fourth timer when at least one of the following conditions is met:

In a relaxed RLM mode, and with the fourth timer during operation, the RRC layer receives a synchronization indication of the physical layer;

or the terminal device switches from a relaxed RLM mode to a normal RLM mode.

64. The terminal device of any of claims 33-63, wherein, when the processing unit enters a normal RLM mode, the RRC layer instructs the physical layer to perform link detection using a measurement requirement corresponding to the normal RLM mode;

Or alternatively

When entering the relaxed RLM mode, the RRC layer instructs the physical layer to perform link detection using the measurement requirements corresponding to the relaxed RLM mode.

65. A terminal device, comprising: a processor and a memory for storing a computer program capable of running on the processor,

Wherein the memory is adapted to store a computer program, said processor being adapted to invoke and run the computer program stored in said memory, performing the steps of the method according to any of claims 1-32.

66. A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any of claims 1-32.

67. A computer readable storage medium for storing a computer program which causes a computer to perform the steps of the method of any one of claims 1-32.