WO2021168865A1

WO2021168865A1 - Communication method and apparatus

Info

Publication number: WO2021168865A1
Application number: PCT/CN2020/077358
Authority: WO
Inventors: 王宏; 罗之虎; 张萌; 金哲
Original assignee: 华为技术有限公司
Priority date: 2020-02-29
Filing date: 2020-02-29
Publication date: 2021-09-02

Abstract

A communication method and apparatus, for enabling a terminal device to perform connection re-establishment in a timely manner. Said method is as follows: a terminal device first determining an estimation value of a channel state parameter of a serving cell; and upon detecting that the estimation value of the channel state parameter satisfies a preset condition, sending channel state information to a network device, the channel state information being used for indicating at least one of the following: a channel state becoming poor, being about to enter an RLF, and requiring neighboring cell measurement. In this way, a terminal device reports channel state information to a network device, so that the network device learns that the terminal device pre-performs neighboring cell measurement, avoiding resource waste caused by the network device blindly scheduling the terminal device, and moreover, if the terminal device pre-performs neighboring cell measurement, the terminal device can acquire channel state information about a candidate cell to be re-established, so as to facilitate quick re-establishment during an RLF; or the terminal device is enabled to pre-enter an RLF when the channel state of the serving cell becomes poor, thereby finding a better cell in a timely manner to perform RRC re-establishment.

Description

Communication method and device

Technical field

This application relates to the field of communication technology, and in particular to a communication method and device.

Background technique

With the development of long-term evolution (LTE) and the fifth generation (5G) communication technology, narrowband internet of things (NB-IoT) and enhanced machine type communication (eMTC) ) Technology has also been developed by leaps and bounds. NB-IoT and eMTC terminal devices have the characteristics of low complexity, low cost, low power consumption, and low bandwidth, and are suitable for a wide range of IoT scenarios. For example, smart water meters, smart electricity meters, smart homes, smart cities, etc. At present, the new radio-Light (NR-Light) and reduced capability (REDCAP) access technologies in 5G have won extensive discussion and attention. They are produced to adapt to the development of 5G and need It has the characteristics of NB-IoT and eMTC terminal equipment.

In order to meet the requirements of low complexity and low cost, this type of terminal equipment does not support the cell handover function of conventional terminal equipment. For example, as shown in Figure 1, when a conventional terminal device moves from cell 1 to cell 2, a handover process generally occurs at location A. At this time, the signal of cell 2 is generally 3 dB better than the signal of cell 1. For such low-complexity and low-cost terminal devices, because they do not support handover, radio link failure (RLF) will occur at the edge B of cell 1 due to signal degradation, and then use radio resources. The control (radio resource control, RRC) connection re-establishment process is re-established to cell 2. In this way, this type of terminal equipment will not be able to rebuild to cell 2 in time, and when such terminal equipment is rebuilt to cell 2, the signal of cell 2 is much better than that of cell 1, that is, this type of terminal equipment is at the edge of cell 1 and cell 1 Communication requires more power and wireless resources.

Summary of the invention

This application provides a communication method and device for realizing timely connection re-establishment of terminal equipment.

In the first aspect, the present application provides a communication method, the method is suitable for terminal equipment, the method may include: first determining the evaluation value of the channel state parameter of the serving cell, and after determining that the evaluation value of the channel state parameter meets the expected value After the conditions are set, channel state information is sent to the network device, and the channel state information is used to indicate at least one of the following: channel state deterioration, about to enter a radio link failure (radio link failure, RLF), and neighbour cell measurement is required.

Through the above method, the terminal device reports the channel state information to the network device, so that the network device can learn that the terminal device needs to perform the neighbor cell measurement in advance, and avoid the waste of resources caused by the network device blindly scheduling the terminal device. During measurement, the terminal device can obtain the channel state information of the candidate reestablished cell to facilitate rapid reconstruction during RLF, or so that the terminal device can enter the RLF in advance when the channel state of the serving cell deteriorates, and then find a better cell in time Perform radio resource control (radio resource control, RRC) reconstruction.

In a possible design, receiving first capability indication information from a network device, where the first capability indication information is used to indicate that the network device supports receiving channel state information, or is used to instruct a terminal device to report channel state information, or Used to notify the terminal device that the network device supports determining the channel state of the terminal device according to the channel state information. In this way, the network device and the terminal device exchange their respective capability information, and the terminal device determines that it can realize timely connection reconstruction by reporting the channel state information, thereby improving the communication quality of the terminal device.

In a possible design, second capability indication information is sent to the network device, where the second capability indication information is used to indicate that the terminal device supports reporting channel state information. In this way, the network device and the terminal device exchange their respective capability information, and the terminal device determines that it can realize timely connection reconstruction by reporting the channel state information, thereby improving the communication quality of the terminal device.

In a possible design, the channel state information is sent through the media access control control element (MAC CE) of the channel quality report, and the quality report field in the MAC CE of the channel quality report It is used to indicate the channel state information; or, the channel state information is sent by the MAC CE of the buffer status report (buffer status report, BSR), and the field in the MAC CE of the BSR is used when the following one is satisfied Indicate the channel state information: the buffer data size is a specific value, the logical channel group identity (LCG ID) is a specific value, the LCG ID is a specific value, and the buffer data size is a specific value; or, the channel state The information is sent through the sub-header of the MAC packet data unit (packet data unit, PDU). In this way, the channel state information can be sent flexibly.

In a possible design, when the terminal device is not configured to release the auxiliary information activation indication, the buffer data size in the BSR MAC CE is a specific value of 0 to indicate the channel state information; or, the channel state information is received from the The channel state information reporting activation instruction of the network device is used to instruct the terminal device to report the channel state information; when the terminal device receives the channel state information reporting activation instruction, it passes The buffer data size in the BSR MAC CE is a specific value of 0 to indicate the channel state information.

In one possible design, a neighborhood measurement is performed. In this way, the terminal device can obtain the channel state information of the candidate re-establishment cell, so as to quickly perform the re-establishment in the RLF.

In a possible design, a neighbor cell measurement instruction is received from the network device, where the neighbor cell measurement instruction is used to instruct the terminal device to perform neighbor cell measurement. In this way, the network device can instruct the terminal device to perform the neighbor cell measurement, so that the terminal device can obtain the channel state information of the candidate reconstruction cell, so as to quickly perform the reconstruction in the RLF.

In a possible design, the neighbor cell measurement indication is also used to instruct the terminal device to perform neighbor cell measurement during the inactive time of discontinuous reception (DRX). This can regulate the time for neighboring cell measurements.

In a possible design, first information from the network device is received, and the first information is used to indicate at least one of the following: the network device supports mobility enhancement, and the network device allows the terminal device to The RRC connected state performs adjacent cell measurement, the network device allows the terminal device to perform co-frequency measurement in the RRC connected state, the network device allows the terminal device to perform inter-frequency measurement in the RRC connected state, and the network device allows all The terminal device performs measurement during the inactive time of discontinuous reception of DRX. In this way, the terminal device can clarify the supported capabilities of the network device, so that the terminal device can perform operations that comply with the capabilities of the network device.

In a possible design, second information is sent to the network device, where the second information is used to indicate at least one of the following: the terminal device supports mobility enhancement, and the terminal device supports neighboring in the RRC connected state. Zone measurement, the terminal device supports intra-frequency measurement in the RRC connected state, the terminal device supports inter-frequency measurement in the RRC connected state, and the terminal device supports measurement in the inactive time of DRX or DRX preference indication; The DRX preference indication is used to indicate the DRX cycle preferred by the terminal device, and the DRX cycle is used for neighbor cell measurement. In this way, the network device can clarify the capabilities of the terminal device to instruct the terminal device to perform operations that comply with the capabilities.

In a possible design, receive first indication information from the network device, the first indication information is used to instruct the terminal device to enter RLF; determine that the radio link fails to enter RLF, and perform radio resource control RRC connection reestablishment Process. In this way, the terminal device can be instructed by the network device to enter the RLF, which can avoid the blind scheduling of the network device when the terminal device autonomously enters the RLF, and avoid waste of resources.

In a possible design, the RLF is a false RLF, and the false RLF is a radio link failure that does not meet the signal conditions for a terminal device to enter the RLF; or, the RLF is an advanced RLF, and the advanced RLF RLF is the radio link failure of the terminal device before reaching the signal condition for entering the RLF. In this way, the terminal device can enter the RLF in advance to perform the neighbor cell measurement in time.

In a possible design, before the terminal device executes the RRC connection re-establishment procedure, the terminal device starts the first timer.

In a possible design, the terminal device executes the RRC connection re-establishment procedure. The specific method may be: during the operation of the first timer, the terminal device performs cell measurement and cell reselection; if the terminal The device determines that the evaluation value of the channel state parameter of the first neighboring cell satisfies a specific condition (for example, the evaluation value of the channel state parameter of the first neighboring cell is greater than the evaluation value of the channel state parameter of the serving cell), and then The first neighboring cell initiates a radio resource control RRC connection re-establishment process; if the terminal device determines that no channel state parameter evaluation value of a neighboring cell satisfies the above-mentioned specific condition until the first timer expires, the terminal device The serving cell performs synchronization detection; if the terminal device can synchronize to the serving cell, the terminal device continues to communicate with the serving cell, and if the terminal device cannot synchronize to the serving cell, then The terminal device initiates an RRC connection re-establishment procedure to the serving cell. In this way, the communication of the terminal device can be guaranteed.

In a possible design, the terminal device receives the offset of the estimated value of the channel state parameter from the network device or the terminal device pre-configures the offset.

In a possible design, the terminal device determines that the evaluation value of the channel state parameter of the first neighboring cell satisfies a specific condition. The specific method may be: the terminal device determines the channel state parameter of the first neighboring cell. The evaluation value is greater than or equal to the sum of the evaluation value of the channel state parameter of the serving cell and the offset. In this way, it can be accurately determined that the estimated value of the channel state parameter of the first neighboring cell satisfies a specific condition.

In a possible design, the terminal device receives the second timer duration from the network device or the terminal device preconfigures the second timer duration.

In a possible design, when the first timer expires or when the terminal device determines that no channel state parameter evaluation value of a neighboring cell meets the specific condition, the terminal device starts the second timing器; During the operation of the second timer, the terminal device is prohibited from performing the next RRC connection re-establishment process; when the second timer expires, the terminal device can perform the next RRC connection re-establishment process.

In a possible design, the terminal device receives a preset positive integer M from the network device or the terminal device pre-configures the M.

In a possible design, the terminal device determines the number of times to execute the first procedure, and the first procedure is the evaluation of the channel state parameters from the terminal device entering a false RLF to the terminal device determining that there is no neighboring cell. Value meets a specific condition; when the number of times is equal to the M, the terminal device deactivates the first threshold value, or the terminal device deactivates the first threshold value and the second threshold Limit. In this way, it is possible to control the number of times that the terminal device performs the RRC re-establishment procedure, so as to avoid resource waste when the terminal device is not re-established from the serving cell to other cells.

In a possible design, receiving second indication information from the network device, where the second indication information is used to indicate that the terminal device is allowed to send the channel state information to the network device. In this way, the terminal device can subsequently send the channel state information to the network device when the condition is met.

In a possible design, the channel state parameters include at least one of the following: reference signal received power (RSRP), reference signal received quality (RSRQ), signal to interference plus noise ratio (RSRP) signal to interference plus noise ratio (SINR), signal-to-noise ratio (signal noise ratio, SNR), number of repetitions of successful reception, number of repetitions, coverage enhancement level, transmit power, downlink block error rate, and specific block error rate Reliably receive the hypothetical physical downlink control channel (physical downlink control channel, PDCCH) link level.

In a possible design, it is determined that the evaluation value of the channel state parameter satisfies a preset condition. The specific method may be: determining that the evaluation value of the channel state parameter is less than a first threshold value, wherein the first threshold The value may be pre-configured by the network device to the terminal device, or sent by the network device to the terminal device, or pre-configured in the terminal device.

In a possible design, when there are K channel state parameters, the terminal device determines that the evaluation value of the channel state parameter is less than the first threshold value, which may be: the terminal device determines K channel states The evaluation values of the N channel state parameters in the parameters are less than the first threshold value of the corresponding channel state parameters, and N is a positive integer less than K, where K is an integer greater than or equal to 2. In this way, it can be flexibly determined that the evaluation value of the channel state parameter of the serving cell satisfies the preset condition.

In a possible design, the second threshold value of the channel state parameter from the network device is received, or the terminal device is pre-configured with the second threshold value.

In a possible design, determining that the evaluation value of the channel state parameter satisfies a preset condition may specifically be: determining that the evaluation value of the channel state parameter is less than the first threshold value, and determining the channel state parameter The amount of change in the evaluation value of is greater than or equal to the second threshold value. The amount of change may be the difference between the reference value of the evaluation value and the current value of the evaluation value, or the amount of change may be the difference between the current value of the evaluation value and the reference value of the evaluation value. Difference. In this way, it is possible to restrict only mobile terminal devices from using the method of entering RLF based on the channel state quantity, avoiding stationary terminal devices from using this method, and increasing their power consumption.

In a possible design, the reference value of the evaluation value may be the evaluation value of the channel state parameter when the first event occurs, where the first event may be at least one of the following: The evaluation value is less than the first threshold value, it is determined that the evaluation value of the channel state parameter is less than the first threshold value for a first period of time, or it is determined that the evaluation value of the channel state parameter is greater than the first threshold The value lasts for the first length of time.

In a possible design, the terminal device receives a preset duration T from the network device or the terminal device is pre-configured with the preset duration T.

In a possible design, the terminal device determines that the evaluation value of the channel state parameter is less than the first threshold. The specific method may be: the terminal device determines that the evaluation value of the channel state parameter is less than the The first threshold value lasts for the preset duration T. This can make the determined result more accurate.

In a possible design, the terminal device determines that the change in the evaluation value of the channel state parameter is greater than or equal to the second threshold. The specific method may be: the terminal device determines the evaluation value of the channel state parameter The amount of change is greater than or equal to the second threshold for the preset duration T. This can make the determined result more accurate.

In the second aspect, the present application provides a communication method, the method is suitable for network equipment, and the method may include: sending first capability indication information to a terminal device, where the first capability indication information is used to indicate the network equipment Support receiving channel state information; receiving channel state information from the terminal device, where the channel state information is used to indicate at least one of the following: the channel state is getting worse, the RLF is about to enter, and the neighbor cell measurement needs to be performed.

Through the above method, the terminal device reports the channel state information to the network device, so that the network device can learn that the terminal device performs the neighbor cell measurement in advance, avoiding the waste of resources caused by the network device blindly scheduling the terminal device, and at the same time, if the terminal device performs the neighbor cell measurement in advance At this time, the terminal device can obtain the channel state information of the candidate re-establishment cell to facilitate rapid re-establishment during RLF, or so that the terminal device can enter the RLF in advance when the channel state of the serving cell deteriorates, and then find a better cell to perform in time. Radio resource control (RRC) reconstruction.

In a possible design, receiving second capability indication information from the terminal device, where the second capability indication information is used to indicate that the terminal device supports reporting channel state information. In this way, the network device and the terminal device exchange their respective capability information, and the terminal device determines that it can realize timely connection reconstruction by reporting the channel state information, thereby improving the communication quality of the terminal device.

In a possible design, the channel state information is received through the MAC CE of the media access control layer control unit of the channel quality report, and the quality report field in the MAC CE of the channel quality report is used to indicate the channel status Information; or, the channel state information is received through the MAC CE of the BSR of the BSR, and the field in the MAC CE of the BSR is used to indicate the channel state information when the following one is satisfied: the buffer data size is a specific value , The logical channel group identifier LCG ID is a specific value, the LCG ID is a specific value, and the buffer data size is a specific value; or, the channel state information is received through the MAC PDU subheader. In this way, the channel state information can be received flexibly.

In a possible design, when the terminal device is not configured to release the auxiliary information activation indication, the buffer data size in the BSR MAC CE is a specific value of 0 to indicate the channel state information; or, to the terminal The device sends a channel state information report activation instruction, and the channel state information report activation instruction is used to instruct the terminal device to report the channel state information; when the network device sends the channel state information report activation instruction, pass all The buffer data size in the BSR MAC CE is a specific value of 0 to indicate the channel state information.

In a possible design, a neighboring cell measurement instruction is sent to the terminal device, and the neighboring cell measurement instruction is used to instruct the terminal device to perform neighboring cell measurement. In this way, the network device can instruct the terminal device to perform the neighbor cell measurement, so that the terminal device can obtain the channel state information of the candidate reconstruction cell, so as to quickly perform the reconstruction in the RLF.

In a possible design, the neighbor cell measurement indication is also used to instruct the terminal device to perform neighbor cell measurement during the inactive time of discontinuous reception of DRX. This can regulate the time for neighboring cell measurements.

In a possible design, first information is sent to the terminal device, where the first information is used to indicate at least one of the following: the network device supports mobility enhancement, and the network device allows the terminal device to be in RRC Connected state to perform neighbor cell measurement, the network device allows the terminal device to perform co-frequency measurement in the RRC connected state, the network device allows the terminal device to perform inter-frequency measurement in the RRC connected state, and the network device allows the The terminal device performs measurement during the inactive time of discontinuous reception of DRX. In this way, the terminal device can clarify the supported capabilities of the network device, so that the terminal device can perform operations that comply with the capabilities of the network device.

In a possible design, second information from the terminal device is received, and the second information is used to indicate at least one of the following: the terminal device supports mobility enhancement, and the terminal device supports performing in the RRC connected state Neighbor cell measurement, the terminal device supports intra-frequency measurement in the RRC connected state, the terminal device supports inter-frequency measurement in the RRC connected state, and the terminal device supports measurement during the inactive time of DRX or DRX preference indication; The DRX preference indication is used to indicate the DRX cycle preferred by the terminal device, and the DRX cycle is used for neighbor cell measurement. In this way, the network device can clarify the capabilities of the terminal device, so that the terminal device can be instructed to operate in compliance with the capabilities.

In a possible design, first indication information is sent to the terminal device, where the first indication information is used to instruct the terminal device to enter the RLF. In this way, the terminal device can be instructed to enter the RLF through the network device, and blind scheduling of the network device when the terminal device enters the RLF autonomously can be avoided, and resource waste can be avoided.

In a possible design, the RLF is a false RLF, and the false RLF is a radio link failure that does not meet the signal conditions for a terminal device to enter the RLF; or, the RLF is an advanced RLF, and the advanced RLF RLF is the radio link failure of the terminal device before reaching the signal condition for entering the RLF. In this way, the terminal equipment can enter the RLF in advance to rebuild the cell in time.

In a possible design, second indication information is sent to the terminal device, where the second indication information is used to indicate that the terminal device is allowed to send channel state information to the network device. In this way, the terminal device can subsequently send the channel state information to the network device when the condition is met.

In a possible design, the channel state parameters include at least one of the following: reference signal received power RSRP, reference signal received quality RSRQ, signal to interference plus noise ratio SINR, signal to noise ratio SNR, number of successful reception repetitions, number of retransmissions , Coverage enhancement level, transmit power, downlink radio link block error rate, and reliable reception of the hypothetical PDCCH link level with a specific block error rate.

In a possible design, the offset of the estimated value of the channel state parameter is sent to the terminal device.

In a possible design, the second timer duration is sent to the terminal device.

In a possible design, a preset positive integer M is sent to the terminal device.

In a possible design, the second threshold value of the channel state parameter is sent to the terminal device. In this way, it is possible to restrict only mobile terminal devices from using the method of entering RLF based on the channel state quantity, avoiding stationary terminal devices from using this method, and increasing their power consumption.

In a possible design, the preset duration T is sent to the terminal device.

In a third aspect, the present application provides a communication method, the method is suitable for terminal equipment, and the method may include: receiving a first threshold value from a network device, where the first threshold value is used to indicate a channel state parameter After determining that the evaluation value of the channel state parameter of the serving cell and the first threshold value meet the preset condition, it is determined that entering the radio link failed RLF.

In this way, by configuring the threshold value of the channel state parameter state and the terminal device monitoring the channel state parameter of the serving cell, the terminal device can enter the RLF in advance when the channel state parameter value of the serving cell deteriorates, and then find a better cell for RRC connection reconstruction.

In a possible design, the terminal device executes the RRC connection re-establishment procedure after determining to enter the RLF.

In a possible design, determining that the evaluation value of the channel state parameter of the serving cell and the first threshold meet a preset condition may specifically be: determining that the evaluation value of the channel state parameter of the serving cell is less than all The first threshold value.

In a possible design, when there are K channel state parameters, the terminal device determines that the evaluation value of the channel state parameter of the serving cell is less than the first threshold value, which may specifically be: the terminal device determines Among the K channel state parameters, the estimated value of the N channel state parameters is less than the first threshold value of the corresponding channel state parameter, and N is a positive integer less than K, where K is an integer greater than or equal to 2.

In a possible design, it is determined that the variation of the evaluation value of the channel state parameter is greater than or equal to the second threshold; wherein the variation may be the difference between the reference value of the evaluation value and the evaluation value The difference between the current value, or the amount of change may be the difference between the current value of the evaluation value and the reference value of the evaluation value. In this way, it is possible to restrict only mobile terminal devices from using the method of entering RLF based on the channel state quantity, avoiding stationary terminal devices from using this method, and increasing their power consumption.

In a possible design, the terminal device determines that the evaluation value of the channel state parameter of the serving cell is less than the first threshold. The specific method may be: the terminal device determines the channel state parameter of the serving cell The evaluation value of is less than the first threshold value for the preset duration T. This can make the determined result more accurate.

In a possible design, the terminal device determines that the amount of change in the evaluation value of the channel state parameter is greater than or equal to the second threshold value, which may specifically be: the terminal device determines the amount of change in the evaluation value of the channel state parameter It is greater than or equal to the second threshold value and lasts for the preset time period T. This can make the determined result more accurate.

In a possible design, channel state information is sent to the network device, and the channel state information is used to indicate at least one of the following: the channel state is getting worse, the RLF is about to enter, and the neighbor cell measurement needs to be performed; The first indication information of the device, where the first indication information is used to instruct the terminal device to enter the RLF. In this way, the terminal device can be instructed to enter the RLF through the network device, and blind scheduling of the network device when the terminal device enters the RLF autonomously can be avoided, and resource waste can be avoided.

In a possible design, capability information is sent to the network device, where the capability information is used to indicate at least one of the following: the terminal device supports a first threshold value (and a second threshold value) based on channel state parameters ) Perform RRC connection re-establishment, the terminal device supports the first threshold value (and the second threshold value) based on the channel state parameter to enter the RLF, and the terminal device supports mobility enhancement. In this way, the network device can clarify the capabilities of the terminal device, thereby instructing operations that comply with the capabilities of the terminal device.

In a possible design, third indication information is received from the network device, where the third indication information is used to indicate at least one of the following: allow the terminal device to be based on the first threshold value of the channel state parameter (and The second threshold value) performs RRC connection reconstruction, allows the terminal device to enter the RLF based on the first threshold value (and the second threshold value) of the channel state parameter, and allows the terminal device to perform mobility enhancement. In this way, the terminal device can realize the RRC connection re-establishment based on the threshold value of the channel state parameter.

In a possible design, the terminal device starts the first timer before performing the RRC connection re-establishment procedure.

In a possible design, the terminal device receives a preset positive integer M from the network device or the terminal device configures the M.

In a fourth aspect, the present application provides a communication method, the method is suitable for network equipment, and the method may include: determining a first threshold value, where the first threshold value is used to indicate a threshold of a channel state parameter; The terminal device sends the first threshold value. In this way, by configuring the threshold value of the channel state parameter state and the terminal device monitoring the channel state parameter of the serving cell, the terminal device can enter the RLF in advance when the channel state parameter value of the serving cell deteriorates, and then find a better cell for RRC connection reconstruction.

In a possible design, the preset duration T is sent to the terminal device.

In a possible design, receiving channel state information from the terminal device, where the channel state information is used to indicate at least one of the following: the channel state is getting worse, the RLF is about to enter, and the neighbor cell measurement needs to be performed; The device sends first indication information, where the first indication information is used to instruct the terminal device to enter the RLF. In this way, the terminal device can be instructed to enter the RLF through the network device, and blind scheduling of the network device when the terminal device enters the RLF autonomously can be avoided, and resource waste can be avoided.

In a possible design, first capability indication information is sent to the terminal device, where the first capability indication information is used to indicate that the network device supports receiving channel state information, or is used to instruct the terminal device to report channel state information, or To notify the terminal device: the network device supports determining the channel state of the terminal device according to the channel state information. In this way, the network device and the terminal device exchange their respective capability information, and the terminal device determines that it can realize timely connection reconstruction by reporting the channel state information, thereby improving the communication quality of the terminal device.

In a possible design, receiving capability information from the terminal device, where the capability information is used to indicate at least one of the following: the terminal device supports a first threshold value (and a second threshold value) based on channel state parameters Value) to perform RRC connection re-establishment, the terminal device supports the first threshold value (and the second threshold value) based on the channel state parameter to enter the RLF, and the terminal device supports mobility enhancement. In this way, the network device can clarify the capabilities of the terminal device, thereby instructing operations that comply with the capabilities of the terminal device.

In a possible design, third indication information is sent to the terminal device, where the third indication information is used to indicate at least one of the following: allowing the terminal device to be based on the first threshold value (and the first threshold value) of the channel state parameter Two thresholds) perform RRC connection reconstruction, allow the terminal device to enter the RLF based on the first threshold (and the second threshold) of the channel state parameter, and allow the terminal device to perform mobility enhancement. In this way, the terminal device can realize the RRC connection re-establishment based on the threshold value of the channel state parameter.

In a possible design, the offset of the evaluation value of the channel state parameter is sent to the terminal device or the offset is preconfigured by the terminal device.

In a possible design, the second timer duration is sent to the terminal device.

In a fifth aspect, the present application also provides a communication device. The communication device may be a terminal device. The communication device is used to implement the function of the terminal device in the first aspect or each possible design example of the first aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the terminal device in the first aspect or each possible design example of the first aspect. For details, refer to the method example The detailed description in, I won’t repeat it here.

In a possible design, the structure of the communication device includes a transceiver, a processor, and optionally a memory. The transceiver is used for sending and receiving data and for communicating and interacting with other devices in the communication system. The processor is configured to support the communication device to perform the above-mentioned first aspect or the corresponding function of the terminal device in each possible design example of the first aspect. The memory is coupled with the processor, and it stores program instructions and data necessary for the communication device.

In a sixth aspect, the present application also provides a communication device. The communication device may be a network device, and the communication device is configured to implement the function of the network device in the second aspect or each possible design example of the second aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the network device in the second aspect or each possible design example of the second aspect. For details, refer to the method example The detailed description in, I won’t repeat it here.

In a possible design, the structure of the communication device includes a transceiver, a processor, and optionally a memory. The transceiver is used for sending and receiving data and for communicating and interacting with other devices in the communication system. The processor is configured to support the communication device to perform the corresponding function of the network device in the foregoing second aspect or each possible design example of the second aspect. The memory is coupled with the processor, and it stores program instructions and data necessary for the communication device.

In a seventh aspect, the present application also provides a communication device, where the communication device may be a terminal device, and the communication device is configured to implement the function of the terminal device in the foregoing third aspect or each possible design example of the third aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the terminal device in the third aspect or each possible design example of the third aspect. For details, refer to the method example The detailed description in, I won’t repeat it here.

In a possible design, the structure of the communication device includes a transceiver, a processor, and optionally a memory. The transceiver is used for sending and receiving data and for communicating and interacting with other devices in the communication system. The processor is configured to support the communication device to perform the corresponding function of the terminal device in the foregoing third aspect or each possible design example of the third aspect. The memory is coupled with the processor, and it stores program instructions and data necessary for the communication device.

In an eighth aspect, the present application also provides a communication device, where the communication device may be a network device, and the communication device is configured to implement the function of the network device in the foregoing fourth aspect or each possible design example of the fourth aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the network equipment in the fourth aspect or each possible design example of the fourth aspect. For details, refer to the method example The detailed description in, I won’t repeat it here.

In a possible design, the structure of the communication device includes a transceiver, a processor, and optionally a memory. The transceiver is used for sending and receiving data and for communicating and interacting with other devices in the communication system. The processor is configured to support the communication device to perform the corresponding function of the network device in the foregoing fourth aspect or each possible design example of the fourth aspect. The memory is coupled with the processor, and it stores program instructions and data necessary for the communication device.

In a ninth aspect, an embodiment of the present application provides a communication system, which may include the aforementioned terminal device and network device.

In a tenth aspect, an embodiment of the present application provides a computer-readable storage medium that stores program instructions, and when the program instructions run on a computer, the computer executes any possible design in the above-mentioned aspects. Exemplarily, the computer-readable storage medium may be any available medium that can be accessed by a computer. Take this as an example but not limited to: computer-readable media may include non-transitory computer-readable media, random-access memory (RAM), read-only memory (ROM), and electrically erasable In addition to programmable read-only memory (electrically EPROM, EEPROM), CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can Any other medium accessed by the computer.

In an eleventh aspect, an embodiment of the present application provides a computer program product including computer program code or instructions, which, when run on a computer, enables the computer to implement the method described in any of the foregoing aspects.

In a twelfth aspect, the present application also provides a chip, including a processor and a communication interface, the processor is coupled with the memory, and is configured to read and execute the program instructions stored in the memory, so that the chip can realize Any of the above methods.

Description of the drawings

Figure 1 is a schematic structural diagram of a communication system in the prior art;

Figure 2 is a schematic structural diagram of a communication system provided by this application;

FIG. 3 is a flowchart of a communication method provided by this application;

Figure 4 is a flowchart of another communication method provided by this application;

FIG. 5 is a schematic structural diagram of a communication device provided by this application;

FIG. 6 is a structural diagram of a communication device provided by this application.

Detailed ways

The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

The embodiments of the present application provide a communication method and device, which are used to realize timely connection re-establishment of terminal equipment. Among them, the method and device described in the present application are based on the same inventive concept, and because the method and the device have similar principles for solving the problem, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

The names of all nodes (devices) and messages in this application are only names set for the convenience of description. The names in the actual network may be different. It should not be understood that this application limits the names of various nodes and messages.

It should be understood that in the embodiments of the present application, "at least one (item)" refers to one (item) or more (items), and "multiple (item)" refers to two (items) or two (items). above. "The following at least one (item)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c It can be single or multiple.

In this application, a radio link failure (RLF) refers to the interruption of the physical layer connection between a terminal device and a network device, which occurs in the RRC connection state of the terminal device. When the RLF lasts for a certain time and the physical layer connection is not restored, the terminal device enters the RRC idle state from the RRC connected state. Correspondingly, entering the RLF mentioned in this application means that the terminal device determines to enter the physical layer connection interruption state with the network device, wherein the "entering RLF" can also be understood as entering the RLF state or RLF occurs. Further, in this state, the terminal device will initiate RRC connection re-establishment. In the embodiments of this application, the network device can instruct the terminal device to enter the RLF in advance, that is, through the method provided in this application, the terminal device can enter the RLF in time, perform cell search and measurement in time, and access the appropriate cell in time to avoid The long-term neighbor cell search and measurement are caused by the occurrence of RLF in the signal condition of the serving cell deteriorated, thereby shortening the interruption time of the terminal equipment service transmission and optimizing the communication quality of the terminal equipment. In addition, it should be understood that in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing description, and cannot be understood as indicating or implying relative importance, nor can it be understood as indicating Or imply the order.

In order to more clearly describe the technical solutions of the embodiments of the present application, the communication methods and devices provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 2 shows the architecture of a possible communication system to which the communication method provided by the embodiment of the present application is applicable. The architecture of the communication system includes a terminal device and at least two network devices, where:

The network device is a device with a wireless transceiver function or a chip that can be installed in the network device. Network equipment is the bridge between the terminal equipment and the core network. The network equipment can be connected through the X2/Xn interface. Its main functions are: wireless resource management, internet protocol (IP) header compression and user data stream encryption , Mobility Management Entity (MME)/Access and Mobility Management Function (AMF) when the terminal device is attached selects and routes user plane data to the Serving Gateway S-GW )/User plane function (UPF), organization and transmission of paging messages, organization and transmission of broadcast messages, measurement and measurement report configuration for the purpose of mobility or scheduling, etc. The network equipment includes but is not limited to: evolved node B (evolved node B, eNB), new generation node B (generated node B, gNB), evolved node B (ng-eNB) connected to the 5G core network, wireless network control Radio network controller (RNC), node B (Node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB), or home Node B, HNB), baseband unit (BBU), access point (AP), wireless relay node, wireless backhaul node, transmission point in wireless fidelity (WIFI) system (transmission and reception point, TRP or transmission point, TP), etc., can also be network nodes that constitute a gNB or transmission point, such as a baseband unit (BBU), or a distributed unit (DU), etc. In FIG. 2, a network device 1 and a network device 2 are exemplarily shown.

The terminal equipment may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment , User agent or user device. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ( Wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, smart terminals, multimedia devices, streaming media devices, and so on. In this application, terminal devices with wireless transceiver functions and chips that can be installed in the aforementioned terminal devices are collectively referred to as terminal devices.

Exemplarily, the terminal device establishes an RRC connection with the network device 1 in cell 1, and after that, the terminal device moves from cell 1 of the network device 1 to cell 2 of the network device 2, The RRC connection with the network device 2 needs to be established.

It should be noted that the communication system shown in FIG. 1 can be, but is not limited to, a long term evolution (LTE) communication system or a fifth generation (5th Generation, 5G) communication system, such as a new generation of wireless access technology (new radio access technology (NR). Optionally, the method in the embodiments of the present application is also applicable to various future communication systems, such as 6G systems or other communication networks.

In this application, the execution subject is the terminal device and the network device for the description of the embodiments. Of course, the terminal device can also be replaced with a processor in the terminal device, or a chip or a chip system, or a functional module, etc.; the network device can also be It is replaced by a processor in a network device, or a chip or a chip system, or a functional module, which is not limited in this application.

A communication method provided by an embodiment of the present application is applicable to the communication system shown in FIG. 2. Referring to Figure 3, the specific process of the method may include:

Step 301: The terminal device determines the evaluation value of the channel state parameter of the serving cell.

In a possible implementation manner, the channel state parameters may include at least one of the following: reference signal received power (RSRP), reference signal received quality (RSRQ), signal and interference plus noise Ratio (signal to interference plus noise ratio, SINR), signal to noise ratio (signal noise ratio, SNR), number of successful reception repetitions, retransmission times, coverage enhancement level, transmit power, downlink block error rate, and specific error The block rate reliably receives the hypothetical PDCCH link level, etc. In a possible implementation manner, the number of repetitions of successful reception may be the number of repetitions required for the terminal device to successfully receive downlink transmission, and the number of repetitions of transmission may be the number of repeated transmissions of a transport block (TB).

In a possible implementation manner, the evaluation value may be obtained by the terminal device through measurement. For example, the terminal device obtains RSRP, RSRQ, SINR or SNR by measuring the reference signal of the serving cell.

In another possible implementation manner, the evaluation value may be determined by the terminal device according to the count of the number of repetitions of receiving downlink transmissions or the number of repetitions of sending uplink transmissions. For example, the terminal device receives the downlink transmission repeatedly sent by the network device, and determines the number of repetitions used for successfully receiving the downlink transmission, and the number of repetitions of the successful reception can reflect the channel state of the terminal device. For another example, the terminal device receives the number of uplink transmission repetitions configured by the network device for sending uplink transmissions or the configured coverage enhancement level, and the number of uplink transmission repetitions or the coverage enhancement level can reflect the channel state of the terminal device.

It should be noted that the above-mentioned specific definition of the channel state parameter is only an example, and other definitions are also possible, which is not limited in this application.

Step 302: The terminal device determines that the evaluation value of the channel state parameter satisfies a preset condition.

In an optional implementation manner, the terminal device determines that the evaluation value of the channel state parameter satisfies a preset condition, which may specifically be: the terminal device determines that the evaluation value of the channel state parameter is less than a first threshold value.

The first threshold value may be pre-configured by the network device to the terminal device, or sent by the network device to the terminal device before step 301, or pre-configured in the terminal device. equipment.

Optionally, the first threshold value may also be determined by the terminal device according to a parameter used to determine the first threshold value, which is not limited in this application.

In an optional implementation manner, when there are K channel state parameters, where K is an integer greater than or equal to 2, the terminal device determines that the evaluation value of the channel state parameter is less than the first threshold value Specifically, it may be: the terminal device determines that the evaluation value of the N channel state parameters of the K channel state parameters is less than the first threshold value of the corresponding channel state parameter, and N is a positive integer less than or equal to K.

In an optional implementation manner, the terminal device further receives the second threshold value of the channel state parameter from the network device, or the terminal device is pre-configured with the second threshold value.

Further, the terminal device determining that the evaluation value of the channel state parameter satisfies a preset condition may specifically be: the terminal device determines that the evaluation value of the channel state parameter is less than the first threshold value, and determining that the evaluation value of the channel state parameter is less than the first threshold value. The amount of change in the evaluation value of the channel state parameter is greater than or equal to the second threshold value. The amount of change may be the difference between the reference value of the evaluation value and the current value of the evaluation value, or the amount of change may be the difference between the current value of the evaluation value and the reference value of the evaluation value. Difference.

Exemplarily, the reference value of the evaluation value may be the evaluation value of the channel state parameter when the first event occurs. For example, the first event may be at least one of the following:

(1) The terminal device determines that the evaluation value of the channel state parameter is less than the first threshold value.

(2) The terminal device determines that the estimated value of the channel state parameter is less than the first threshold value for a first period of time.

(3) The terminal device determines that the evaluation value of the channel state parameter is greater than the first threshold value for a first period of time.

Specifically, when the first event occurs, the currently determined evaluation value is recorded as the reference value. The current value of the evaluation value is the currently determined evaluation value.

In an optional implementation manner, the terminal device receives a preset duration T from the network device or the terminal device is pre-configured with the preset duration T, and then the terminal device determines the channel state The evaluation value of the parameter is less than the first threshold value, which may specifically be: the terminal device determines that the evaluation value of the channel state parameter is less than the first threshold value for the preset duration T.

In an optional implementation manner, the terminal device receives a preset duration T from the network device or the terminal device is pre-configured with the preset duration T, and the terminal device determines the channel state parameter The amount of change in the evaluation value of the channel state parameter is greater than or equal to the second threshold value, which may specifically be: the terminal device determines that the amount of change in the evaluation value of the channel state parameter is greater than or equal to the second threshold value to continue the The preset duration is T.

Step 303: The terminal device sends channel state information to the network device, where the channel state information is used to indicate at least one of the following: the channel state is getting worse, the RLF is about to enter, and the neighbor cell measurement needs to be performed.

Optionally, the method further includes step 3031: the network device sends first capability indication information to the terminal device, where the first capability indication information is used to indicate that the network device supports receiving channel state information. Specifically, before step 303, the network device may notify the terminal device through the first capability indication information: the network device supports receiving channel state information, or the first capability indication information is used to instruct the terminal device to report channel state information , Or notify the terminal device through the first capability indication information: the network device supports determining the channel state of the terminal device according to the channel state information.

Further optionally, the method further includes step 3032: the terminal device sends second capability indication information to the network device, where the second capability indication information is used to indicate that the terminal device supports reporting channel state information. Specifically, after the terminal device receives the first capability indication information from the network device, it can be determined that the network device supports receiving channel state information. In a possible implementation, the terminal device informs the network device through the second capability indication information: the terminal device Support reporting channel state information, or it can also be understood that the second capability report indication information responds to the first capability indication information.

Through step 3031 and step 3032, the network device and the terminal device exchange their respective capability information, and the terminal device determines that it can realize timely connection reconstruction by reporting the channel state information, thereby improving the communication quality of the terminal device.

In an optional implementation manner, the method further includes step 3033: the network device sends a channel state information report activation indication to the terminal device (for example, enabling channel state information reporting ((channel state information, CSI)-report) enable)), the channel state information reporting activation indication is used to indicate that the terminal device can report the channel state information. When the terminal device receives the channel state reporting activation instruction, it may send channel state information to the network device after determining that a preset condition is satisfied.

In an optional implementation manner, the channel state information may be sent in the following three ways:

Manner a1. The channel state information is sent through a media access control control element (MAC CE) of a channel quality report.

Exemplarily, Table 1 and Table 2 are structural schematic examples of the MAC CE and the corresponding subheader of the channel quality report. Specifically, as shown in Table 1 and Table 2, the MAC CE of the channel quality report and the corresponding sub-header may include a logical channel identification (logical channel identification, LCID) field, a quality report (quality report) field, and reserved bits. R.

In a possible implementation manner, the quality report field in the MAC CE of the channel quality report is used to indicate the channel state information. Specifically, when the value of the LCID field is 10001, the content transmitted by the MAC CE is a downlink channel quality report (downlink channel quality report). That is to say, when the value of the LCID field is 10001, the structure of the MAC CE and the corresponding subheader can be as shown in Table 1 or Table 2. At this time, the quality report field in the MAC CE can be used to indicate the channel quality. Or the channel state information. For example, the quality report field can be used to indicate that the channel status has deteriorated. After receiving the MAC CE, the network device can determine the channel status of the terminal device, and further schedule the terminal device according to the channel status.

Table 1

Table 2

Among them, the value of the quality report is shown in Table 3 below:

table 3

quality report比特(bits)quality report bits (bits)	value(值)value
00000000	noMeasurements(没有测量)noMeasurements (no measurement)
00010001	candidateRep-A(候选重复次数)candidateRep-A (number of candidate repetitions)
00100010	candidateRep-BcandidateRep-B
00110011	candidateRep-CcandidateRep-C

01000100	candidateRep-DcandidateRep-D
01010101	candidateRep-EcandidateRep-E
01100110	candidateRep-FcandidateRep-F
01110111	candidateRep-GcandidateRep-G
10001000	candidateRep-HcandidateRep-H
10011001	candidateRep-IcandidateRep-I
10101010	candidateRep-JcandidateRep-J
10111011	candidateRep-KcandidateRep-K
11001100	candidateRep-LcandidateRep-L
11011101	信道状态信息Channel state information
11101110	Reserved(保留)Reserved
11111111	ReservedReserved

Table 3 shows the corresponding relationship between the quality report value and the value value.

It should be noted that the value column in Table 3 is the value corresponding to different values of quality report, and different values indicate different meanings; for example, as shown in the current table 3, when the value of quality report is 0001 When -1100, they correspond to different candidate repetition times. In Table 3, only candidateRep-A to candidateRep-L are used as examples. The specific values are not limited in this application. In the example given in Table 3, the value of quality report (that is, the bits in the quality report bits column in Table 3) is 1101 to indicate the channel state information. Of course, the value of quality report is only an example. The value of quality report can also be 0000, 1110, or 1111 to indicate the channel state information, which is not limited in this application. For example, the channel status can be indicated by the value of quality report 1101, that is, the "quality report value is 1101" as the channel status indication (bad channel status indication, BCSI), the channel status information Different values can be used to indicate the meaning of the aforementioned channel state information indication, which is not limited in this application.

In another possible implementation manner, the reserved field in the MAC CE of the channel quality report is used to indicate the channel state information. Specifically, as described above, when the value of the LCID field is 10001, the structure of the MAC CE and the corresponding subheader is shown in Table 1 or Table 2. At this time, the R field in the MAC CE can be used to indicate the channel state information. For example, the first R field is predefined to indicate that the neighbor cell measurement is performed in advance. After receiving the MAC CE, the network device can determine the channel state of the terminal device, and further schedule the terminal device according to the channel state. In this embodiment, the R field can be shared with the quality report field. For example, the first R field is used to indicate the deterioration of channel quality, and the quality report is used to indicate the number of repetitions to improve communication efficiency.

Manner a2. The channel state information is sent through the MAC CE of the buffer status report (buffer status report, BSR).

Exemplarily, Table 4 is an example of a schematic structural diagram of BSR MAC CE and corresponding sub-headers. Specifically, as shown in Table 4, the BSR MAC CE and the corresponding sub-header may include an LCID field, a buffer size (buffer size) field, a logical channel group identity (logical channel group identity, LCG ID) field, R, F2 , E field.

In a possible implementation manner, when the buffer size (buffer size) in the BSR MAC CE is a specific value, it is used to indicate the channel state information.

Specifically, as shown in Table 4, in the structure of the BSR MAC CE and the corresponding subheader, when the LCID is 11101, the LCG ID is 00, and the buffer size is a specific value of 0, it is used to indicate the channel state information.

Table 4

In an optional implementation manner, when the terminal device is not configured to release the auxiliary information activation indication (rai-Activation), the channel state information may be indicated by the value of the buffer size being a specific value of 0 or other values. . For example, the value of buffer size can be 0 to indicate that the neighbor cell measurement needs to be performed. In this way, the network device can learn that the terminal device performs the neighbor cell measurement in advance based on the instruction in this way, and avoid resource waste caused by the network device blindly dispatching the terminal device.

In an optional implementation manner, when step 3033 exists, when the terminal device sends channel state information to the network device after determining that the preset condition is satisfied, the terminal device may set the buffer size to a specific value of 0 or other values To indicate the channel state information. For example, the value of buffer size can be 0 to indicate that RLF is about to be entered. In this way, the network device can learn that the terminal device performs the neighbor cell measurement in advance based on the instruction in this way, and avoid resource waste caused by the network device blindly dispatching the terminal device.

In a possible implementation manner, when the LCG ID in the BSR MAC CE is a specific value, it is used to indicate the channel state information.

Specifically, as shown in Table 4 in the structure of the BSR MAC CE and the corresponding subheader, when the value of the LCID field is 11101, the value of the LCG ID field is the specific value 01 or 10 or 11, etc., used to indicate the channel status information. For example, when the value of the LCG ID field is 01, it can indicate that the channel state has deteriorated; for another example, when the value of the LCG ID field is 10, it can indicate that neighbouring cell measurement is required; for another example, when the value of the LCG ID field is 11, it can indicate that Enter RLF. Of course, the foregoing example is only an example, and there are other possible indication situations, which are not limited in this application. In this way, the network device can learn that the terminal device performs the neighbor cell measurement in advance based on the instruction in this way, and avoid resource waste caused by the network device blindly dispatching the terminal device.

In a possible implementation manner, when the LCG ID in the BSR MAC CE is a specific value and the buffer size is a specific value, it is used to indicate the channel state information.

Specifically, as shown in Table 4 in the structure of the BSR MAC CE and the corresponding subheader, when the value of the LCID field is 11101, the LCG ID is the specific value 01 or 10 or 11 or other values and the buffer size is the specific value 0 or other Value is used to indicate the channel state information. For example, when the LCG ID is 01 and the buffer size is 0, it can indicate that the channel state has deteriorated; for example, when the LCG ID is 10 and the buffer size is 0, it can indicate that the neighbor cell measurement needs to be performed; for example, the LCG ID is 11 and the buffer size is 0. When it is 0, it can indicate that RLF is about to be entered. Of course, there can be other situations, which will not be listed here. In this way, the network device can learn that the terminal device performs the neighbor cell measurement in advance based on the instruction in this way, and avoid resource waste caused by the network device blindly dispatching the terminal device.

Manner a3: The channel state information is sent through a MAC packet data unit (packet data unit, PDU) sub-header (sub-header).

Exemplarily, Table 5 and Table 6 are examples of schematic diagrams of the structure of the MAC subheader. Specifically, as shown in Table 5, the MAC PDU subheader can include the LCID field, the R field, the F2 field, and the E field; as shown in Table 6, the MAC PDU subheader can include the LCID field, the R field, the F2 field, and the E field. , F field, L field.

In a possible implementation manner, the R field in the MAC PDU subheader is used to indicate the channel state information.

For example, in the structure of the MAC PDU subheader shown in Table 5, when R is 1, it can be used to indicate that the channel state has deteriorated. In this way, the network device can learn that the terminal device performs the neighbor cell measurement in advance based on the instruction in this way, and avoid resource waste caused by the network device blindly dispatching the terminal device.

In another possible implementation manner, the F2 field in the MAC PDU subheader is used to indicate the channel state information.

For example, in the structure of the MAC PDU subheader shown in Table 5, when F2 is 1, it can be used to indicate that neighbor cell measurement needs to be performed. In this way, the network device can learn that the terminal device performs the neighbor cell measurement in advance based on the instruction in this way, and avoid resource waste caused by the network device blindly dispatching the terminal device.

In another possible implementation manner, the LCID field in the MAC PDU subheader is used to indicate the channel state information.

table 5

R

F2

E

LCID

In a possible implementation manner, the F field in the MAC PDU subheader is used to indicate the channel state information.

For example, in the structure of the MAC PDU subheader shown in Table 6, when F is 1, it can be used to indicate that RLF is about to enter. In this way, the network device can learn that the terminal device performs the neighbor cell measurement in advance based on the instruction in this way, and avoid resource waste caused by the network device blindly dispatching the terminal device.

Table 6

Optionally, after step 303, the terminal device may execute at least one of the following procedures:

Process c1: The terminal device performs neighbor cell measurement.

In an optional implementation manner, the terminal device performs neighbor cell measurement by itself.

In an optional implementation manner, the terminal device performs a neighbor cell measurement after receiving a neighbor cell measurement instruction from the network device, and the neighbor cell measurement instruction is used to instruct the terminal device to perform a neighbor cell measurement .

In an exemplary implementation, the neighbor cell measurement indication is further used to instruct the terminal device to perform neighbor cell measurement during the inactive time of discontinuous reception (DRX).

In an optional implementation manner, the neighbor cell measurement indication may be sent by the network device in the following three ways:

Manner d1. The neighbor cell measurement indication may be sent by the MAC CE that triggers the downlink channel quality report, where the neighbor cell measurement indication may be indicated when the LCID in the MAC CE of the downlink channel quality report is a specific value. For example, in the MAC CE structure of the downlink channel quality report shown in Table 7, the current standard defines the LCID as 10001 to add a function for indicating the measurement indication of the neighboring cell (that is, when the LCID is 10001, it can be The indication content predefined by the current standard can also indicate neighboring cell measurement at the same time), or other bit values, such as a value that is not defined in the current standard (such as a reserved value), can be used to indicate the neighboring cell measurement indication. The application is not restricted. In this way, in the above manner, the terminal device can perform the neighbor cell measurement after receiving the neighbor cell measurement instruction, so that the channel state of the candidate re-establishment cell can be learned, so as to facilitate rapid re-establishment in the RLF.

Table 7

R

F2

E

LCID

Manner d2. The neighboring cell measurement indication may be sent through the MAC PDU subheader, where the neighboring cell measurement indication may be indicated when the LCID in the MAC PDU subheader is a specific value. For example, in the structure of the MAC PDU subheader shown in Table 8, when the LCID is a specific value of 01011 or 01111 or other bit values, it is used to indicate the neighbor cell measurement indication. In this way, in the above manner, the terminal device can perform the neighbor cell measurement after receiving the neighbor cell measurement instruction, so that the channel state of the candidate re-establishment cell can be learned, so as to facilitate rapid re-establishment in the RLF.

Table 8

R

F2

E

LCID

Manner d3: The neighbor cell measurement indication may be sent through the MAC PDU subheader, where the neighbor cell measurement indication may be indicated by the F2 field in the MAC PDU subheader having a specific value. For example, in the structure of the MAC PDU subheader shown in Table 8, when F2 is a specific value of 1 or other values, it is used to indicate the neighboring cell measurement indication. In this way, in the above manner, the terminal device can perform the neighbor cell measurement after receiving the neighbor cell measurement instruction, so that the channel state of the candidate re-establishment cell can be learned, so as to facilitate rapid re-establishment in the RLF.

Manner d4: The neighboring cell measurement instruction may be sent through a MAC PDU subheader, where the neighboring cell measurement instruction may be indicated through the R field in the MAC PDU subheader having a specific value. For example, in the structure of the MAC PDU subheader shown in Table 8, when R is a specific value of 1 or other values, it is used to indicate the neighbor cell measurement indication. In this way, in the above manner, the terminal device can perform the neighbor cell measurement after receiving the neighbor cell measurement instruction, so that the channel state of the candidate re-establishment cell can be learned, so as to facilitate rapid re-establishment in the RLF.

Manner d5: The neighboring cell measurement instruction may be sent through a MAC PDU subheader, where the neighboring cell measurement instruction may be indicated when the F field in the MAC PDU subheader is a specific value. For example, in the structure of the MAC PDU subheader shown in Table 6, when F is a specific value of 1 or other values, it is used to indicate the neighbor cell measurement indication. In this way, in the above manner, the terminal device can perform the neighbor cell measurement after receiving the neighbor cell measurement instruction, so that the channel state of the candidate re-establishment cell can be learned, so as to facilitate rapid re-establishment in the RLF.

In an optional implementation manner, before step 303, the network device sends first information to the terminal device, where the first information is used to indicate at least one of the following: the network device supports mobility enhancement The network device allows the terminal device to perform neighbor cell measurement in the RRC connected state, the network device allows the terminal device to perform co-frequency measurement in the RRC connected state, and the network device allows the terminal device to perform the same-frequency measurement in the RRC connected state. Perform inter-frequency measurement, and the network device allows the terminal device to perform measurement during the inactive time of discontinuous reception of DRX.

In an optional implementation manner, the terminal device sends second information to the network device, and the second information is used to indicate at least one of the following: the terminal device supports mobility enhancement, and the terminal device Supports neighbor cell measurement in the RRC connected state, the terminal device supports co-frequency measurement in the RRC connected state, the terminal device supports inter-frequency measurement in the RRC connected state, and the terminal device supports the DRX inactive time Measurement or DRX preference indication; the DRX preference indication is used to indicate the DRX cycle preferred by the terminal device, and the DRX cycle is used for neighbor cell measurement.

Process c2: The terminal device receives first indication information from the network device, where the first indication information is used to instruct the terminal device to enter the RLF; the terminal device determines that the radio link fails to enter the RLF, and executes the radio resource Control the RRC connection re-establishment process.

In an optional implementation manner, the RLF is false RLF (false RLF), and the false RLF is a radio link failure that does not meet the signal conditions for the terminal device to enter the RLF; or, the RLF is early RLF (early RLF), the early RLF is the radio link failure of the terminal device before reaching the signal condition for entering the RLF.

In an optional implementation manner, before the terminal device executes the RRC connection re-establishment procedure, the terminal device starts the first timer. Exemplarily, the first timer may be timer T311'.

In a specific implementation manner, the terminal device executes the RRC connection re-establishment process. The specific process may be: During the operation of the first timer, the terminal device performs cell measurement and cell reselection; if the terminal The device determines that the evaluation value of the channel state parameter of the first neighboring cell satisfies a certain condition (for example, the evaluation value of the channel state parameter of the first neighboring cell is greater than the evaluation value of the channel state parameter of the serving cell), and then The first neighboring cell initiates the RRC connection re-establishment process; if the terminal device determines that the evaluation value of the channel state parameter of no neighboring cell satisfies the above-mentioned specific condition until the first timer expires, the terminal device sends the service to the service The cell is synchronized; if the terminal device can synchronize to the serving cell, the terminal device continues to communicate with the serving cell; if the terminal device cannot synchronize to the serving cell, the terminal device The serving cell initiates an RRC connection re-establishment procedure.

For the convenience of description, the process from the terminal device entering the false RLF to the terminal device determining that the evaluation value of the channel state parameter of no neighboring cell satisfies a specific condition can be recorded as a process c3.

In an optional implementation manner, the terminal device receives the offset of the estimated value of the channel state parameter from the network device or the terminal device pre-configures the offset, the terminal device Determining that the evaluation value of the channel state parameter of the first neighboring cell satisfies a specific condition may specifically be: the terminal device determines that the evaluation value of the channel state parameter of the first neighboring cell is greater than or equal to the channel state of the serving cell The sum of the estimated value of the parameter and the offset.

In an optional implementation manner, the terminal device receives the second timer duration from the network device or the terminal device preconfigures the second timer duration. Wherein, the second timer is used to control false RLF.

In an optional implementation manner, when the first timer expires or when the terminal device determines that no evaluation value of the channel state parameter of a neighboring cell satisfies the above-mentioned specific condition, the terminal device starts the first timer Two timers; during the operation of the second timer, the terminal device is prohibited from performing the next RRC connection re-establishment procedure; when the second timer expires, the terminal device can perform the next RRC connection re-establishment procedure.

In an optional implementation manner, the terminal device determines the number of times to execute the process c3; when the number of times is equal to M, the terminal device deactivates the first threshold value, or the terminal The device deactivates the first threshold value and the second threshold value. Wherein, M is a positive integer configured by the network device or a positive integer preconfigured by the terminal device.

In a specific implementation manner, the network device sends second indication information to the terminal device, where the second indication information is used to indicate that the terminal device is allowed to send the channel state information to the network device.

Using the communication method provided by the embodiments of the present application, the terminal device reports channel state information to the network device, so that the network device can learn that the terminal device performs the neighbor cell measurement in advance, avoiding the waste of resources caused by the network device blindly dispatching the terminal device. The terminal device performs neighbor cell measurement in advance, and the terminal device can obtain the channel state information of the candidate re-establishment cell to facilitate rapid re-establishment during RLF, or to facilitate the terminal device to enter the RLF in advance when the channel state of the serving cell deteriorates, and then Find a better cell in time for RRC reconstruction.

Another communication method provided by an embodiment of the present application is applicable to the communication system shown in FIG. 2. Referring to Figure 4, the specific process of the method may include:

Step 401: The network device determines a first threshold value, where the first threshold value is used to indicate the threshold of the channel state parameter.

Specifically, for the meaning of the channel state parameter, reference may be made to the related description in step 301, which will not be repeated here.

Specifically, if there are at least two channel state parameters, the network device determines at least two corresponding first threshold values.

Step 402: The network device sends the first threshold value to a terminal device.

Specifically, the network device may send the first threshold value to the terminal device through any of the following messages: system message, RRC connection setup (RRC connection setup) message, RRC connection reconfiguration (RRC connection reconfiguration) Messages, RRC connection resume (RRC connection resume) messages, etc.

Step 403: The terminal device determines that the evaluation value of the channel state parameter of the serving cell and the first threshold value satisfy a preset condition.

Specifically, if the terminal device determines that the evaluation value of the channel state parameter of the serving cell and the first threshold value meet a preset condition, reference may be made to the related description in step 302, which will not be described in detail here.

In an optional implementation manner, the network device sends the second threshold value of the channel state parameter to the terminal device, or the terminal device is pre-configured with the second threshold value. Specifically, please refer to the related description in step 302, which will not be repeated here.

In an optional implementation manner, the network device sends a preset duration T to the terminal device or the terminal device is pre-configured with the preset duration T. For details, refer to the related description in step 302 , I won’t repeat it here.

Step 404: The terminal device determines that it fails to enter the radio link RLF.

In an optional implementation manner, after determining to enter the RLF, the terminal device executes a radio resource control RRC connection re-establishment procedure.

In an optional implementation manner, before the terminal device determines that the radio link fails to enter the RLF, the terminal device sends channel state information to the network device. For the specific channel state information, refer to step 303 The related description of, will not be described in detail here.

In an optional implementation manner, before sending the channel state information to the network device, the terminal device receives first capability indication information from the network device, and sends second capability indication information to the network device For details, reference may be made to the related description of the first capability indication information and the second capability indication information in step 303 in the foregoing embodiment, which will not be described in detail here.

In an optional implementation manner, the terminal device receives first indication information from the network device, where the first indication information is used to instruct the terminal device to enter the RLF. For details, refer to the related description of step 303.

In a specific implementation manner, the terminal device executes the RRC connection re-establishment process. For the specific process, reference may be made to the related description in step 303, which will not be repeated here.

In an optional implementation manner, the terminal device receives the offset of the estimated value of the channel state parameter from the network device or the terminal device pre-configures the offset. For details, refer to the related description in step 303.

In an optional implementation manner, the terminal device receives the second timer duration from the network device or the terminal device pre-configures the second timer duration. Wherein, the second timer is used to control false RLF.

For the description of the first timer and the second timer, refer to the related description in step 303, and details are not repeated here.

In an optional implementation manner, the terminal device receives a positive integer M configured by the network device or the terminal device preconfigures the positive integer M. The terminal device determines the number of times to execute the process c3 in step 303. For details, refer to the related description in step 303.

In an optional implementation manner, the terminal device sends capability information to the network device, where the capability information is used to indicate at least one of the following: the terminal device supports a first threshold value based on channel state parameters (And the second threshold) perform RRC connection re-establishment, the terminal device supports the first threshold (and the second threshold) based on the channel state parameter to enter the RLF, and the terminal device supports mobility enhancement.

In an optional implementation manner, the terminal device receives third indication information from the network device, where the third indication information is used to indicate at least one of the following: allowing the terminal device to perform the operation based on the channel state parameter The first threshold value (and the second threshold value) performs RRC connection reestablishment, the terminal device is allowed to enter the RLF based on the first threshold value (and the second threshold value) of the channel state parameter, and the terminal device is allowed to perform Increased mobility.

Using the communication method provided by the embodiments of the present application, by configuring the threshold value of the channel state parameter state and the terminal device monitoring the channel state parameter of the serving cell, the terminal device can enter the RLF in advance when the channel state parameter value of the serving cell deteriorates, and then Find a better cell for RRC connection re-establishment.

Based on the above embodiments, an embodiment of the present application also provides a communication device. As shown in FIG. 5, the communication device 500 may include a transceiver unit 501 and a processing unit 502. Wherein, the transceiving unit 501 is used for the communication device 500 to receive information (message or data) or to send information (message or data), and the processing unit 502 is used to control and manage the actions of the communication device 500. The processing unit 502 may also control the steps performed by the transceiver unit 501.

Exemplarily, the communication device 500 may be the terminal device in the above-mentioned embodiment, specifically may be a processor, or a chip or a chip system in the terminal device, or a functional module, etc.; or, the communication device 500 may be It is the network device in the foregoing embodiment, which may specifically be a processor, or a chip or a chip system, or a functional module of the network device.

In an embodiment, when the communication device 500 is used to implement the function of the terminal device in the embodiment described in FIG. 3, it may specifically include:

The processing unit 502 is used to determine the evaluation value of the channel state parameter of the serving cell, and to determine that the evaluation value of the channel state parameter satisfies a preset condition; the transceiving unit 501 is used to send channel state information to the network device, the The channel state information is used to indicate at least one of the following: the channel state is getting worse, the RLF is about to enter, and the neighbor cell measurement needs to be performed.

In an optional implementation manner, the transceiving unit 501 is further configured to receive first capability indication information from a network device, where the first capability indication information is used to indicate that the network device supports receiving channel state information, or It is used to instruct the terminal device to report channel state information, or to notify the terminal device that the network device supports determining the channel state of the terminal device according to the channel state information.

In an optional implementation manner, the transceiving unit 501 is further configured to send second capability indication information to the network device, where the second capability indication information is used to indicate that the terminal device supports reporting channel state information.

In a possible example, the channel state information is sent through the MAC CE of the channel quality report, and the quality report field in the MAC CE of the channel quality report is used to indicate the channel state information; or, the channel The status information is sent through the MAC CE of the BSR, and the field in the MAC CE of the BSR is used to indicate the channel status information when the following one is satisfied: the buffer data size is a specific value, and the logical channel group identifier LCG ID is a specific value , LCG ID is a specific value and the buffered data size is a specific value; or, the channel state information is sent through the MAC PDU subheader.

In an optional embodiment, when the terminal device is not configured to release the auxiliary information activation indication, the buffer data size in the BSR MAC CE is a specific value of 0 to indicate the channel state information; or The transceiving unit 501 is further configured to receive a channel state information reporting activation instruction from the network device, and the channel state information reporting activation instruction is used to instruct the terminal device to report the channel state information; when the transceiver unit 501 receives When the channel state information reports the activation indication, the channel state information is indicated by using the buffer data size in the BSR MAC CE to be a specific value of 0.

Specifically, the processing unit 502 is also used to perform neighbor cell measurement.

In a possible design, the transceiver unit 501 is further configured to receive a neighbor cell measurement instruction from the network device, and the neighbor cell measurement instruction is used to instruct the terminal device to perform neighbor cell measurement.

Exemplarily, the neighbor cell measurement indication is also used to instruct the terminal device to perform neighbor cell measurement during the inactive time of discontinuous reception of DRX.

In an optional manner, the transceiving unit 501 is further configured to receive first information from the network device, where the first information is used to indicate at least one of the following: the network device supports mobility enhancement, The network device allows the terminal device to perform neighbor cell measurements in the RRC connected state, the network device allows the terminal device to perform intra-frequency measurements in the RRC connected state, and the network device allows the terminal device to perform measurements in the RRC connected state. Inter-frequency measurement, the network device allows the terminal device to perform measurement during the inactive time of discontinuous reception of DRX.

Correspondingly, the transceiving unit 501 is further configured to send second information to the network device, where the second information is used to indicate at least one of the following: the terminal device supports mobility enhancement, and the terminal device supports RRC Connected state for neighbor cell measurement, the terminal device supports co-frequency measurement in the RRC connected state, the terminal device supports inter-frequency measurement in the RRC connected state, and the terminal device supports measurement or DRX in the inactive time of DRX Preference indication; the DRX preference indication is used to indicate the DRX cycle preferred by the terminal device, and the DRX cycle is used for neighbor cell measurement.

In a possible example, the transceiving unit 501 is further configured to receive first indication information from the network device, and the first indication information is used to instruct the terminal device to enter the RLF; the processing unit 502 also uses When it is determined that the RLF has failed to enter the radio link, the radio resource control RRC connection re-establishment procedure is executed.

Exemplarily, the RLF is a false RLF, and the false RLF is a radio link failure that does not meet the signal conditions for a terminal device to enter the RLF; or, the RLF is an advanced RLF, and the advanced RLF is The wireless link of the terminal device fails before reaching the signal condition for entering the RLF.

In an optional implementation manner, the processing unit 502 is further configured to start the first timer before executing the RRC connection re-establishment procedure.

In a specific implementation manner, when the processing unit 502 executes the RRC connection re-establishment procedure, it is specifically configured to: perform cell measurement and cell reselection during the operation of the first timer; if the first neighboring cell is determined The estimated value of the channel state parameter meets a specific condition (for example, the estimated value of the channel state parameter of the first neighboring cell is greater than the estimated value of the channel state parameter of the serving cell), then the transceiver unit 501 is controlled to report to the The first neighboring cell initiates the radio resource control RRC connection re-establishment process; if it is determined that the estimated value of the channel state parameter of no neighboring cell meets the above-mentioned specific condition until the first timer expires, synchronization is performed to the serving cell, if If the serving cell can be synchronized, the transceiver unit 501 is controlled to continue to communicate with the serving cell. If the serving cell cannot be synchronized, the transceiver unit 501 is controlled to initiate an RRC connection re-establishment procedure to the serving cell. .

In a possible embodiment, the transceiving unit 501 is further configured to receive the offset of the evaluation value of the channel state parameter from the network device.

Specifically, when the processing unit 502 determines that the evaluation value of the channel state parameter of the first neighboring cell satisfies a specific condition, it is specifically configured to: determine that the evaluation value of the channel state parameter of the first neighboring cell is greater than or equal to the evaluation value of the channel state parameter of the first neighboring cell. The sum of the estimated value of the channel state parameter of the serving cell and the offset.

In an optional design, the transceiver unit 501 is further configured to receive a second timer duration from the network device.

In a specific design, the processing unit 502 is further configured to: start the second Timer; during the running of the second timer, the next RRC connection re-establishment procedure is prohibited; when the second timer expires, the next RRC connection re-establishment procedure can be performed.

In an exemplary design, the transceiver unit 501 is further configured to receive a preset positive integer M from the network device.

In a possible design, the processing unit 502 is further configured to: determine the number of times to execute the first process, the first process is from the terminal device entering a false RLF to the terminal device determining that there is no neighboring cell A process in which the evaluation value of the channel state parameter satisfies a specific condition; when the number of times is equal to the M, the first threshold value is deactivated, or the first threshold value and the second threshold value are deactivated.

In a possible design, the transceiving unit 501 is further configured to receive second indication information from the network device, and the second indication information is used to indicate that the terminal device is allowed to send a message to the network device. Road status information.

Specifically, the channel state parameters include at least one of the following: reference signal received power RSRP, reference signal received quality RSRQ, signal-to-interference plus noise ratio SINR, signal-to-noise ratio SNR, number of successful reception repetitions, number of retransmissions, coverage enhancement level , Transmitting power, downlink block error rate, the link level for reliable reception of the hypothetical PDCCH with a specific block error rate.

In an optional implementation manner, when the processing unit 502 determines that the evaluation value of the channel state parameter satisfies a preset condition, it is specifically configured to: determine that the evaluation value of the channel state parameter is less than a first threshold; The first threshold value may be pre-configured by the network device to the terminal device, or sent by the network device to the terminal device, or pre-configured in the terminal device.

Specifically, when there are K channel state parameters, when the processing unit 502 determines that the evaluation value of the channel state parameter is less than the first threshold, it is specifically configured to: determine N of the K channel state parameters The estimated value of the channel state parameter is less than the first threshold value of the corresponding channel state parameter, N is a positive integer less than K, where K is an integer greater than or equal to 2.

In a possible design, the transceiver unit 501 is further configured to receive the second threshold value of the channel state parameter from the network device.

In an example, the processing unit 502 is further configured to determine that the amount of change in the evaluation value of the channel state parameter is greater than or equal to the second threshold value.

Specifically, the reference value of the evaluation value may be the evaluation value of the channel state parameter when the first event occurs, where the first event may be at least one of the following: it is determined that the evaluation value of the channel state parameter is less than the The first threshold value, it is determined that the evaluation value of the channel state parameter is less than the first threshold value for a first period of time, or it is determined that the evaluation value of the channel state parameter is greater than the first threshold value for the first time period. duration.

In an example, the transceiving unit 501 is further configured to receive a preset duration T from the network device.

In a possible design, when the processing unit 502 determines that the evaluation value of the channel state parameter is less than the first threshold, it is specifically configured to: determine that the evaluation value of the channel state parameter is less than the first threshold. The threshold value lasts for the preset duration T.

In an optional implementation manner, when the processing unit 502 determines that the variation of the evaluation value of the channel state parameter is greater than or equal to the second threshold value, it is specifically configured to: determine the evaluation value of the channel state parameter The amount of change is greater than or equal to the second threshold for the preset duration T.

In another embodiment, when the communication device 500 is used to implement the function of the network device in the embodiment described in FIG. 3, it may specifically include:

The transceiving unit 501 is configured to send first capability indication information to a terminal device, and the first capability indication information is used to indicate that the network device supports receiving channel state information and receives channel state information from the terminal device. The status information is used to indicate at least one of the following: the channel status is getting worse, the RLF is about to enter, and the neighbor cell measurement needs to be performed; the processing unit 502 is used to control the transceiver unit 501 to send and receive data.

In a possible manner, the transceiving unit 501 is further configured to receive second capability indication information from the terminal device, where the second capability indication information is used to indicate that the terminal device supports reporting channel state information.

In an example, the channel state information is received through the MAC CE of the media access control layer control unit of the channel quality report, and the quality report field in the MAC CE of the channel quality report is used to indicate the channel state information; Alternatively, the channel state information is received through the MAC CE of the BSR of the BSR, and the field in the MAC CE of the BSR is used to indicate the channel state information when the MAC CE of the BSR satisfies one of the following items: the buffer data size is a specific value, logical The channel group identifier LCG ID is a specific value, the LCG ID is a specific value, and the buffer data size is a specific value; or, the channel state information is received through the MAC PDU subheader.

Optionally, when the terminal device is not configured to release the auxiliary information activation indication, the buffered data size in the BSR MAC CE is a specific value of 0 to indicate the channel state information; or, the transceiver unit 501 also uses When sending the channel state information report activation instruction to the terminal device, the channel state information report activation instruction is used to instruct the terminal device to report the channel state information; when the transceiver unit 501 sends the channel state information report When the activation instruction is activated, the channel state information is indicated by using the buffer data size in the BSR MAC CE to be a specific value of 0.

In an optional implementation manner, the transceiving unit 501 is further configured to send a neighboring cell measurement instruction to the terminal device, and the neighboring cell measurement instruction is used to instruct the terminal device to perform neighboring cell measurement.

Specifically, the neighbor cell measurement instruction is also used to instruct the terminal device to perform neighbor cell measurement during the inactive time of discontinuous reception of DRX.

In an example, the transceiver unit 501 is further configured to send first information to the terminal device, where the first information is used to indicate at least one of the following: the network device supports mobility enhancement, and the network device allows The terminal device performs neighbor cell measurement in the RRC connected state, the network device allows the terminal device to perform co-frequency measurement in the RRC connected state, and the network device allows the terminal device to perform inter-frequency measurement in the RRC connected state. The network device allows the terminal device to perform measurement during the inactive time of discontinuous reception of DRX.

In a possible design, the transceiving unit 501 is further configured to receive second information from the terminal device, and the second information is used to indicate at least one of the following: the terminal device supports mobility enhancement, the The terminal device supports neighbor cell measurement in the RRC connected state, the terminal device supports co-frequency measurement in the RRC connected state, the terminal device supports inter-frequency measurement in the RRC connected state, and the terminal device supports inactive DRX Time measurement or DRX preference indication; the DRX preference indication is used to indicate the DRX cycle preferred by the terminal device, and the DRX cycle is used for neighbor cell measurement.

Optionally, the transceiving unit 501 is further configured to send first indication information to the terminal device, where the first indication information is used to instruct the terminal device to enter the RLF.

In an embodiment, the transceiver unit 501 is further configured to send second indication information to the terminal device, where the second indication information is used to indicate that the terminal device is allowed to send channel state information to the network device.

In an example, the transceiver unit 501 is further configured to send the offset of the evaluation value of the channel state parameter to the terminal device.

In another example, the transceiver unit 501 is further configured to send the second timer duration to the terminal device.

In another example, the transceiver unit 501 is further configured to send a preset positive integer M to the terminal device.

In another example, the transceiver unit 501 is further configured to send the second threshold value of the channel state parameter to the terminal device.

In another example, the transceiver unit 501 is further configured to send a preset duration T to the terminal device.

In another embodiment, when the communication device 500 is used to implement the function of the terminal device in the embodiment described in FIG. 4, it may specifically include:

The transceiver unit 501 is configured to receive a first threshold value from a network device, where the first threshold value is used to indicate the threshold of a channel state parameter; the processing unit 502 is configured to determine the evaluation of the channel state parameter of the serving cell The value and the first threshold value meet a preset condition; and it is determined that entering the radio link fails RLF.

In an optional implementation manner, the processing unit 502 is further configured to perform a radio resource control RRC connection re-establishment procedure.

In an optional implementation manner, the channel state parameters include at least one of the following: reference signal received power RSRP, reference signal received quality RSRQ, signal to interference plus noise ratio SINR, signal to noise ratio SNR, number of successful reception repetitions, The number of repeated transmissions, the coverage enhancement level, the transmission power, the downlink radio link block error rate, and the link level at which the hypothetical PDCCH can be reliably received with a specific block error rate.

Optionally, when the processing unit 502 determines that the evaluation value of the channel state parameter of the serving cell and the first threshold meet a preset condition, it is specifically configured to: determine the channel state parameter of the serving cell The evaluation value is less than the first threshold value.

Exemplarily, when there are K channel state parameters, when the processing unit 502 determines that the evaluation value of the channel state parameters of the serving cell is less than the first threshold, it is specifically used to: determine K channel state parameters Among the N channel state parameters, the evaluation value is less than the first threshold value of the corresponding channel state parameter, N is a positive integer less than K, where K is an integer greater than or equal to 2.

Specifically, the processing unit 502 is further configured to determine that the variation of the evaluation value of the channel state parameter is greater than or equal to the second threshold; wherein the variation may be the reference value of the evaluation value and the The difference between the current value of the evaluation value, or the amount of change may be the difference between the current value of the evaluation value and the reference value of the evaluation value.

In an example, the reference value of the evaluation value may be the evaluation value of the channel state parameter when the first event occurs, where the first event may be at least one of the following: it is determined that the evaluation value of the channel state parameter is less than The first threshold value, determining that the evaluation value of the channel state parameter is less than the first threshold value for a first time period, or determining that the evaluation value of the channel state parameter is greater than the first threshold value for the first time period For a long time.

In a possible implementation manner, the transceiving unit 501 is further configured to receive a preset duration T from the network device.

Specifically, when the processing unit 502 determines that the evaluation value of the channel state parameter of the serving cell is less than the first threshold value, it is specifically configured to: determine that the evaluation value of the channel state parameter of the serving cell is less than the first threshold. A threshold value lasts for the preset time period T.

In a possible design, when the processing unit 502 determines that the variation of the evaluation value of the channel state parameter is greater than or equal to the second threshold value, it is specifically configured to: determine that the variation of the evaluation value of the channel state parameter is greater than or It is equal to the second threshold and lasts for the preset time period T.

Exemplarily, the transceiving unit 501 is further configured to send channel state information to the network device, where the channel state information is used to indicate at least one of the following: the channel state is getting worse, the RLF is about to enter, and the neighbor cell measurement needs to be performed; And receiving first indication information from the network device, where the first indication information is used to instruct the terminal device to enter the RLF.

In a possible implementation manner, the transceiving unit 501 is further configured to receive first capability indication information from a network device, where the first capability indication information is used to indicate that the network device supports receiving channel state information, or is used to Instructs the terminal device to report channel state information, or is used to notify the terminal device that the network device supports determining the channel state of the terminal device according to the channel state information.

In a possible design, the transceiver unit 501 is further configured to send second capability indication information to the network device, where the second capability indication information is used to indicate that the terminal device supports reporting channel state information.

Specifically, the RLF is a false RLF, and the false RLF is a radio link failure that does not meet the signal conditions for a terminal device to enter the RLF; or, the RLF is an advanced RLF, and the advanced RLF is the The wireless link of the terminal device before it reaches the signal condition to enter the RLF fails.

Exemplarily, the transceiver unit 501 is further configured to send capability information to the network device, where the capability information is used to indicate at least one of the following: the terminal device supports a first threshold value based on channel state parameters (and The second threshold value) performs RRC connection re-establishment, the terminal device supports the first threshold value (and the second threshold value) based on the channel state parameter to enter the RLF, and the terminal device supports mobility enhancement.

Specifically, the transceiving unit 501 is further configured to receive third indication information from the network device, where the third indication information is used to indicate at least one of the following: allowing the terminal device to be based on the first gate of the channel state parameter Limit value (and second threshold value) for RRC connection reconstruction, allow the terminal device to enter RLF based on the first threshold value (and second threshold value) of the channel state parameter, and allow the terminal device to perform mobility enhancement .

In an example, the processing unit 502 is also used to start the first timer before performing the RRC connection re-establishment procedure.

Specifically, when the processing unit 502 is performing the RRC connection re-establishment procedure, it is specifically configured to: perform cell measurement and cell reselection during the operation of the first timer; if the channel state of the first neighboring cell is determined The evaluation value of the parameter satisfies a specific condition (for example, the evaluation value of the channel state parameter of the first neighboring cell is greater than the evaluation value of the channel state parameter of the serving cell), then the transceiver unit 501 is controlled to report the channel state parameter to the first neighboring cell. The cell initiates the radio resource control RRC connection re-establishment process; if it is determined that the estimated value of the channel state parameter of no neighboring cell meets the above-mentioned specific condition until the first timer expires, synchronization detection is performed to the serving cell; if synchronization is possible For the above serving cell, the transceiver unit 501 is controlled to continue to communicate with the serving cell, and if the serving cell cannot be synchronized, the transceiver unit 501 is controlled to initiate an RRC connection re-establishment process to the serving cell.

In a possible design, the transceiver unit 501 is further configured to receive the offset of the evaluation value of the channel state parameter from the network device.

In a possible manner, the transceiver unit 501 is further configured to receive a second timer duration from the network device.

Exemplarily, the processing unit 502 is further configured to: start the second timer when the first timer expires or when it is determined that the evaluation value of the channel state parameter of no neighboring cell meets the specific condition; During the operation of the second timer, execution of the next RRC connection re-establishment procedure is prohibited; when the second timer expires, the next RRC connection re-establishment procedure can be executed.

In an optional implementation manner, the transceiving unit 501 is further configured to receive a preset positive integer M from the network device.

Specifically, the processing unit 502 is further configured to: determine the number of times to execute the first process, the first process is from the terminal device entering a false RLF to the terminal device determining that there is no channel state parameter of a neighboring cell A process in which the evaluation value meets a specific condition; when the number of times is equal to the M, the first threshold value is deactivated, or the first threshold value and the second threshold value are deactivated.

In another embodiment, when the communication device 500 is used to implement the function of the network device in the embodiment shown in FIG. 4, it may specifically include:

The processing unit 502 is configured to determine a first threshold value, and the first threshold value is used to indicate a threshold of a channel state parameter; the transceiver unit 501 is configured to send the first threshold value to a terminal device.

In an example, the transceiver unit 501 is further configured to send the second threshold value of the channel state parameter to the terminal device.

In a possible manner, the transceiver unit 501 is further configured to send a preset duration T to the terminal device.

Exemplarily, the transceiving unit 501 is further configured to receive channel state information from the terminal device, where the channel state information is used to indicate at least one of the following: the channel state is getting worse, the RLF is about to enter, and the neighbor cell measurement needs to be performed. And sending first indication information to the terminal device, where the first indication information is used to instruct the terminal device to enter the RLF.

In a possible implementation manner, the transceiving unit 501 is further configured to send first capability indication information to a terminal device, where the first capability indication information is used to indicate that the network device supports receiving channel state information, or is used to indicate The terminal device reports the channel state information, or is used to notify the terminal device that the network device supports determining the channel state of the terminal device according to the channel state information.

In a possible implementation manner, the transceiving unit 501 is further configured to receive second capability indication information from the terminal device, where the second capability indication information is used to indicate that the terminal device supports reporting channel state information.

In a possible design, the RLF is a false RLF, and the false RLF is a radio link failure that does not meet the signal conditions for a terminal device to enter the RLF; or, the RLF is an advanced RLF, and the advanced RLF RLF is the radio link failure of the terminal device before reaching the signal condition for entering the RLF.

In a possible manner, the transceiving unit 501 is further configured to receive capability information from the terminal device, where the capability information is used to indicate at least one of the following: the terminal device supports the first gate based on channel state parameters The limit value (and the second threshold value) performs RRC connection reestablishment, the terminal device supports the first threshold value (and the second threshold value) based on the channel state parameter to enter the RLF, and the terminal device supports mobility enhancement.

In a possible implementation manner, the transceiving unit 501 is further configured to send third indication information to the terminal device, where the third indication information is used to indicate at least one of the following: allowing the terminal device to be based on channel state parameters The first threshold value (and the second threshold value) of the RRC connection is reestablished, the terminal device is allowed to enter the RLF based on the first threshold value (and the second threshold value) of the channel state parameter, and the terminal device is allowed to enter the RLF. Improved execution mobility.

Exemplarily, the transceiver unit 501 is further configured to send the offset of the evaluation value of the channel state parameter to the terminal device.

Optionally, the transceiving unit 501 is further configured to send a second timer duration to the terminal device.

In an implementation manner, the transceiver unit 501 is further configured to send a preset positive integer M to the terminal device.

It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation. The functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

Based on the above embodiments, an embodiment of the present application also provides a communication device. As shown in FIG. 6, the communication device 600 may include a transceiver 601 and a processor 602. Optionally, the communication device 600 may further include a memory 603. Wherein, the memory 603 may be provided inside the communication device 600, and may also be provided outside the communication device 600. Wherein, the processor 602 can control the transceiver 601 to receive and send data.

Specifically, the processor 602 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP. The processor 602 may further include a hardware chip. The above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof.

Wherein, the transceiver 601, the processor 602, and the memory 603 are connected to each other. Optionally, the transceiver 601, the processor 602, and the memory 603 are connected to each other through a bus 604; the bus 604 may be a Peripheral Component Interconnect (PCI) bus or an extended industry standard Structure (Extended Industry Standard Architecture, EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used in FIG. 6, but it does not mean that there is only one bus or one type of bus.

In an optional implementation manner, the memory 603 is used to store programs and the like. Specifically, the program may include program code, and the program code includes computer operation instructions. The memory 603 may include RAM, or may also include non-volatile memory, such as one or more disk memories. The processor 602 executes the application program stored in the memory 603 to realize the above-mentioned functions, thereby realizing the functions of the communication device 600.

Exemplarily, the communication apparatus 600 may be the terminal device in the foregoing embodiment, and may also be the network device in the foregoing embodiment.

In an embodiment, when the communication device 600 is used to implement the function of the terminal device in the embodiment described in FIG. 3, it may specifically include:

The processor 602 is configured to determine the evaluation value of the channel state parameter of the serving cell, and to determine that the evaluation value of the channel state parameter satisfies a preset condition; the transceiver 601 is configured to send channel state information to a network device, the The channel state information is used to indicate at least one of the following: the channel state is getting worse, the RLF is about to enter, and the neighbor cell measurement needs to be performed.

In an optional implementation manner, the transceiver 601 is further configured to receive first capability indication information from a network device, where the first capability indication information is used to indicate that the network device supports receiving channel state information, or It is used to instruct the terminal device to report channel state information, or to notify the terminal device that the network device supports determining the channel state of the terminal device according to the channel state information.

In an optional implementation manner, the transceiver 601 is further configured to send second capability indication information to the network device, and the second capability indication information is used to indicate that the terminal device supports reporting channel state information.

In an optional embodiment, when the terminal device is not configured to release the auxiliary information activation indication, the buffer data size in the BSR MAC CE is a specific value of 0 to indicate the channel state information; or The transceiver 601 is further configured to receive a channel state information report activation instruction from the network device, and the channel state information report activation instruction is used to instruct the terminal device to report the channel state information; when the transceiver 601 receives When the channel state information reports the activation indication, the channel state information is indicated by using the buffer data size in the BSR MAC CE to be a specific value of 0.

Specifically, the processor 602 is further configured to perform neighbor cell measurement.

In a possible design, the transceiver 601 is further configured to receive a neighbor cell measurement instruction from the network device, and the neighbor cell measurement instruction is used to instruct the terminal device to perform neighbor cell measurement.

In an optional manner, the transceiver 601 is further configured to receive first information from the network device, and the first information is used to indicate at least one of the following: the network device supports mobility enhancement, The network device allows the terminal device to perform neighbor cell measurements in the RRC connected state, the network device allows the terminal device to perform intra-frequency measurements in the RRC connected state, and the network device allows the terminal device to perform measurements in the RRC connected state. Inter-frequency measurement, the network device allows the terminal device to perform measurement during the inactive time of discontinuous reception of DRX.

Correspondingly, the transceiver 601 is further configured to send second information to the network device, and the second information is used to indicate at least one of the following: the terminal device supports mobility enhancement, and the terminal device supports RRC Connected state for neighbor cell measurement, the terminal device supports co-frequency measurement in the RRC connected state, the terminal device supports inter-frequency measurement in the RRC connected state, and the terminal device supports measurement or DRX in the inactive time of DRX Preference indication; the DRX preference indication is used to indicate the DRX cycle preferred by the terminal device, and the DRX cycle is used for neighbor cell measurement.

In a possible example, the transceiver 601 is further configured to receive first indication information from the network device, where the first indication information is used to instruct the terminal device to enter the RLF; the processor 602 also uses When it is determined that the RLF has failed to enter the radio link, the radio resource control RRC connection re-establishment procedure is executed.

In an optional implementation manner, the processor 602 is further configured to start the first timer before executing the RRC connection re-establishment procedure.

In a specific implementation manner, when the processor 602 executes the RRC connection re-establishment procedure, it is specifically configured to: perform cell measurement and cell reselection during the operation of the first timer; if the first neighboring cell is determined The estimated value of the channel state parameter meets a specific condition (for example, the estimated value of the channel state parameter of the first neighboring cell is greater than the estimated value of the channel state parameter of the serving cell), then the transceiver 601 is controlled to report to the The first neighboring cell initiates the radio resource control RRC connection re-establishment process; if it is determined that the estimated value of the channel state parameter of no neighboring cell meets the above-mentioned specific condition until the first timer expires, synchronization is performed to the serving cell, if If it can synchronize to the serving cell, control the transceiver 601 to continue to communicate with the serving cell. If it cannot synchronize to the serving cell, control the transceiver 601 to initiate an RRC connection re-establishment procedure to the serving cell .

In a possible embodiment, the transceiver 601 is further configured to receive the offset of the evaluation value of the channel state parameter from the network device.

Specifically, when the processor 602 determines that the evaluation value of the channel state parameter of the first neighboring cell satisfies a specific condition, it is specifically configured to: determine that the evaluation value of the channel state parameter of the first neighboring cell is greater than or equal to all. The sum of the estimated value of the channel state parameter of the serving cell and the offset.

In an optional design, the transceiver 601 is further configured to receive the second timer duration from the network device.

In a specific design, the processor 602 is further configured to: when the first timer expires or when it is determined that no channel state parameter evaluation value of a neighboring cell meets the specific condition, start the second Timer; during the running of the second timer, the next RRC connection re-establishment procedure is prohibited; when the second timer expires, the next RRC connection re-establishment procedure can be performed.

In an exemplary design, the transceiver 601 is further configured to receive a preset positive integer M from the network device.

In a possible design, the processor 602 is further configured to: determine the number of times to execute the first process, the first process is from the terminal device entering a false RLF to the terminal device determining that there is not a neighboring cell The process in which the evaluation value of the channel state parameter satisfies a specific condition; when the number of times is equal to the M, the terminal device deactivates the first threshold value, or deactivates the first threshold value and the second threshold value Threshold value.

Optionally, the transceiver 601 is further configured to receive second indication information from the network device, where the second indication information is used to indicate that the terminal device is allowed to send channel state information to the network device.

In an optional implementation manner, when the processor 602 determines that the evaluation value of the channel state parameter satisfies a preset condition, it is specifically configured to: determine that the evaluation value of the channel state parameter is less than a first threshold; The first threshold value may be pre-configured by the network device to the terminal device, or sent by the network device to the terminal device, or pre-configured in the terminal device.

Specifically, when there are K channel state parameters, when the processor 602 determines that the evaluation value of the channel state parameter is less than the first threshold, it is specifically configured to: determine N of the K channel state parameters The estimated value of the channel state parameter is less than the first threshold value of the corresponding channel state parameter, N is a positive integer less than K, where K is an integer greater than or equal to 2.

In a possible design, the transceiver 601 is further configured to receive the second threshold value of the channel state parameter from the network device.

In an example, the processor 602 is further configured to determine that the amount of change in the evaluation value of the channel state parameter is greater than or equal to the second threshold value.

In an example, the transceiver 601 is further configured to receive a preset duration T from the network device.

In a possible design, when the processor 602 determines that the evaluation value of the channel state parameter is less than the first threshold, it is specifically configured to: determine that the evaluation value of the channel state parameter is less than the first threshold. The threshold value lasts for the preset duration T.

In an optional implementation manner, when the processor 602 determines that the variation of the evaluation value of the channel state parameter is greater than or equal to the second threshold value, it is specifically configured to: determine the evaluation value of the channel state parameter The amount of change is greater than or equal to the second threshold for the preset duration T.

In another embodiment, when the communication device 600 is used to implement the function of the network device in the embodiment described in FIG. 3, it may specifically include:

The transceiver 601 is configured to send first capability indication information to a terminal device, and the first capability indication information is used to indicate that the network device supports receiving channel state information and receives channel state information from the terminal device. The status information is used to indicate at least one of the following: the channel status is getting worse, the RLF is about to enter, and the neighbor cell measurement needs to be performed; the processor 602 is used to control the transceiver 601 to send and receive data.

In a possible manner, the transceiver 601 is further configured to receive second capability indication information from the terminal device, and the second capability indication information is used to indicate that the terminal device supports reporting channel state information.

Optionally, when the terminal device is not configured with a release auxiliary information activation indication, the buffer data size in the BSR MAC CE is a specific value of 0 to indicate the channel state information; or, the transceiver 601 also uses When sending the channel state information report activation instruction to the terminal device, the channel state information report activation instruction is used to instruct the terminal device to report the channel state information; when the transceiver 601 sends the channel state information report When the activation instruction is activated, the channel state information is indicated by using the buffer data size in the BSR MAC CE to be a specific value of 0.

In an optional implementation manner, the transceiver 601 is further configured to send a neighboring cell measurement instruction to the terminal device, and the neighboring cell measurement instruction is used to instruct the terminal device to perform neighboring cell measurement.

In an example, the transceiver 601 is further configured to send first information to the terminal device, and the first information is used to indicate at least one of the following: the network device supports mobility enhancement, and the network device allows The terminal device performs neighbor cell measurement in the RRC connected state, the network device allows the terminal device to perform co-frequency measurement in the RRC connected state, and the network device allows the terminal device to perform inter-frequency measurement in the RRC connected state. The network device allows the terminal device to perform measurement during the inactive time of discontinuous reception of DRX.

In a possible design, the transceiver 601 is further configured to receive second information from the terminal device, and the second information is used to indicate at least one of the following: the terminal device supports mobility enhancement, the The terminal device supports neighbor cell measurement in the RRC connected state, the terminal device supports co-frequency measurement in the RRC connected state, the terminal device supports inter-frequency measurement in the RRC connected state, and the terminal device supports inactive DRX Time measurement or DRX preference indication; the DRX preference indication is used to indicate the DRX cycle preferred by the terminal device, and the DRX cycle is used for neighbor cell measurement.

Optionally, the transceiver 601 is further configured to send first indication information to the terminal device, where the first indication information is used to instruct the terminal device to enter the RLF.

In an implementation manner, the transceiver 601 is further configured to send second indication information to the terminal device, and the second indication information is used to indicate that the terminal device is allowed to send channel state information to the network device.

In an example, the transceiver 601 is further configured to send the offset of the evaluation value of the channel state parameter to the terminal device.

In another example, the transceiver 601 is further configured to send the second timer duration to the terminal device.

In another example, the transceiver 601 is further configured to send a preset positive integer M to the terminal device.

In another example, the transceiver 601 is further configured to send the second threshold value of the channel state parameter to the terminal device.

In another example, the transceiver 601 is further configured to send a preset duration T to the terminal device.

In another embodiment, when the communication device 600 is used to implement the function of the terminal device in the embodiment described in FIG. 4, it may specifically include:

The transceiver 601 is configured to receive a first threshold value from a network device, where the first threshold value is used to indicate the threshold of a channel state parameter; the processor 602 is configured to determine the evaluation of the channel state parameter of the serving cell The value and the first threshold value meet a preset condition; and it is determined that entering the radio link fails RLF.

In an optional implementation manner, the processor 602 is further configured to perform a radio resource control RRC connection re-establishment procedure.

Optionally, when the processor 602 determines that the evaluation value of the channel state parameter of the serving cell and the first threshold meet a preset condition, the processor 602 is specifically configured to: determine the channel state parameter of the serving cell The evaluation value is less than the first threshold value.

Exemplarily, when there are K channel state parameters, when the processor 602 determines that the evaluation value of the channel state parameters of the serving cell is less than the first threshold, it is specifically configured to: determine K channel state parameters Among the N channel state parameters, the evaluation value is less than the first threshold value of the corresponding channel state parameter, N is a positive integer less than K, where K is an integer greater than or equal to 2.

Specifically, the processor 602 is further configured to determine that the variation of the evaluation value of the channel state parameter is greater than or equal to the second threshold; wherein the variation may be the reference value of the evaluation value and the total value of the evaluation value. The difference between the current value of the evaluation value, or the amount of change may be the difference between the current value of the evaluation value and the reference value of the evaluation value.

In a possible implementation manner, the transceiver 601 is further configured to receive a preset duration T from the network device.

Specifically, when the processor 602 determines that the evaluation value of the channel state parameter of the serving cell is less than the first threshold value, it is specifically configured to: determine that the evaluation value of the channel state parameter of the serving cell is less than the first threshold value. A threshold value lasts for the preset time period T.

In a possible design, when the processor 602 determines that the variation of the evaluation value of the channel state parameter is greater than or equal to the second threshold value, it is specifically configured to: determine that the variation of the evaluation value of the channel state parameter is greater than or It is equal to the second threshold and lasts for the preset time period T.

Exemplarily, the transceiver 601 is further configured to send channel state information to the network device, where the channel state information is used to indicate at least one of the following: the channel state is getting worse, the RLF is about to enter, and the neighbor cell measurement needs to be performed; And receiving first indication information from the network device, where the first indication information is used to instruct the terminal device to enter the RLF.

In a possible implementation manner, the transceiver 601 is further configured to receive first capability indication information from a network device, where the first capability indication information is used to indicate that the network device supports receiving channel state information, or is used to Instructs the terminal device to report channel state information, or is used to notify the terminal device that the network device supports determining the channel state of the terminal device according to the channel state information.

In a possible design, the transceiver 601 is further configured to send second capability indication information to the network device, and the second capability indication information is used to indicate that the terminal device supports reporting channel state information.

Exemplarily, the transceiver 601 is further configured to send capability information to the network device, where the capability information is used to indicate at least one of the following: the terminal device supports a first threshold value based on channel state parameters (and The second threshold value) performs RRC connection re-establishment, the terminal device supports the first threshold value (and the second threshold value) based on the channel state parameter to enter the RLF, and the terminal device supports mobility enhancement.

Specifically, the transceiver 601 is further configured to receive third indication information from the network device, where the third indication information is used to indicate at least one of the following: allowing the terminal device to be based on the first gate of the channel state parameter Limit value (and second threshold value) for RRC connection reconstruction, allow the terminal device to enter RLF based on the first threshold value (and second threshold value) of the channel state parameter, and allow the terminal device to perform mobility enhancement .

In an example, the processor 602 is further configured to start the first timer before executing the RRC connection re-establishment procedure.

Specifically, when the processor 602 executes the RRC connection re-establishment procedure, it is specifically configured to: perform cell measurement and cell reselection during the operation of the first timer; if the channel status of the first neighboring cell is determined The evaluation value of the parameter satisfies a specific condition (for example, the evaluation value of the channel state parameter of the first neighboring cell is greater than the evaluation value of the channel state parameter of the serving cell), then the transceiver 601 is controlled to report to the first neighboring cell. The cell initiates the radio resource control RRC connection re-establishment process; if it is determined that the estimated value of the channel state parameter of no neighboring cell meets the above-mentioned specific condition until the first timer expires, synchronization detection is performed to the serving cell; if synchronization is possible For the above serving cell, the transceiver 601 is controlled to continue to communicate with the serving cell, and if the serving cell cannot be synchronized, the transceiver 601 is controlled to initiate an RRC connection re-establishment procedure to the serving cell.

In a possible design, the transceiver 601 is further configured to receive the offset of the evaluation value of the channel state parameter from the network device.

In a possible manner, the transceiver 601 is further configured to receive a second timer duration from the network device.

Exemplarily, the processor 602 is further configured to: start the second timer when the first timer expires or when it is determined that the evaluation value of the channel state parameter of no neighboring cell meets the specific condition; During the operation of the second timer, execution of the next RRC connection re-establishment procedure is prohibited; when the second timer expires, the next RRC connection re-establishment procedure can be executed.

In an optional implementation manner, the transceiver 601 is further configured to receive a preset positive integer M from the network device.

Specifically, the processor 602 is further configured to: determine the number of times to execute the first process, the first process is from the terminal device entering a false RLF to the terminal device determining that there is no channel state parameter of a neighboring cell A process in which the evaluation value meets a specific condition; when the number of times is equal to the M, the first threshold value is deactivated, or the first threshold value and the second threshold value are deactivated.

In another embodiment, when the communication device 600 is used to implement the function of the network device in the embodiment described in FIG. 4, it may specifically include:

The processor 602 is configured to determine a first threshold value, and the first threshold value is used to indicate a threshold of a channel state parameter; the transceiver 601 is configured to send the first threshold value to a terminal device.

In an example, the transceiver 601 is further configured to send the second threshold value of the channel state parameter to the terminal device.

In a possible manner, the transceiver 601 is further configured to send a preset duration T to the terminal device.

Exemplarily, the transceiver 601 is further configured to receive channel state information from the terminal device, and the channel state information is used to indicate at least one of the following: the channel state is getting worse, the RLF is about to enter, and the neighbor cell measurement needs to be performed. And sending first indication information to the terminal device, where the first indication information is used to instruct the terminal device to enter the RLF.

In a possible implementation manner, the transceiver 601 is further configured to send first capability indication information to the terminal device, where the first capability indication information is used to indicate that the network device supports receiving channel state information, or is used to indicate The terminal device reports the channel state information, or is used to notify the terminal device that the network device supports determining the channel state of the terminal device according to the channel state information.

In a possible implementation manner, the transceiver 601 is further configured to receive second capability indication information from the terminal device, and the second capability indication information is used to indicate that the terminal device supports reporting channel state information.

In a possible manner, the transceiver 601 is further configured to receive capability information from the terminal device, where the capability information is used to indicate at least one of the following: the terminal device supports the first gate based on channel state parameters The limit value (and the second threshold value) performs RRC connection reestablishment, the terminal device supports the first threshold value (and the second threshold value) based on the channel state parameter to enter the RLF, and the terminal device supports mobility enhancement.

In a possible implementation manner, the transceiver 601 is further configured to send third indication information to the terminal device, where the third indication information is used to indicate at least one of the following: allow the terminal device to be based on channel state parameters The first threshold value (and the second threshold value) of the RRC connection is reestablished, the terminal device is allowed to enter the RLF based on the first threshold value (and the second threshold value) of the channel state parameter, and the terminal device is allowed to enter the RLF. Improved execution mobility.

Exemplarily, the transceiver 601 is further configured to send the offset of the evaluation value of the channel state parameter to the terminal device.

Optionally, the transceiver 601 is further configured to send a second timer duration to the terminal device.

In an implementation manner, the transceiver 601 is further configured to send a preset positive integer M to the terminal device.

Based on the above embodiments, the embodiments of the present application provide a communication system, and the communication system may include the terminal devices and network devices involved in the above embodiments.

The embodiments of the present application also provide a computer-readable storage medium, which is used to store a computer program. When the computer program is executed by a computer, the computer can implement any type of communication provided by the foregoing method embodiments. method.

The embodiments of the present application also provide a computer program product, the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer can implement any of the communication methods provided in the foregoing method embodiments.

An embodiment of the present application also provides a chip, including a processor and a communication interface, the processor is coupled to the memory, and is used to call a program in the memory to enable the chip to implement any of the communication methods provided in the foregoing method embodiments .

Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are used to generate It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to this application without departing from the protection scope of this application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, then this application is also intended to include these modifications and variations.

Claims

A communication method, characterized in that the method is suitable for terminal equipment, and includes:

Determine the evaluation value of the channel state parameter of the serving cell;

Determining that the evaluation value of the channel state parameter satisfies a preset condition;

The channel state information is sent to the network device, where the channel state information is used to indicate at least one of the following: the channel state is deteriorated, the RLF is about to enter the radio link, and the neighbor cell measurement needs to be performed.
The method of claim 1, comprising:

The channel state information is sent through the MAC CE of the media access control layer control unit of the channel quality report, and the quality report field in the MAC CE of the channel quality report is used to indicate the channel state information; or

The channel state information is sent through the MAC CE of the buffer state report BSR, and the field in the BSR MAC CE is used to indicate the channel state information when the following one is satisfied: the buffer data size is a specific value, and the logical channel group identifier LCG ID is a specific value, LCG ID is a specific value, and the buffer data size is a specific value; or

The channel state information is sent through the PDU subheader of the MAC packet data unit.
The method according to claim 2, wherein the method further comprises:

When the terminal device is not configured to release the auxiliary information activation indication, indicate the channel state information by using the buffer data size in the BSR MAC CE to be a specific value of 0; or

Receive a channel state information report activation instruction from the network device, where the channel state information report activation instruction is used to instruct the terminal device to report the channel state information; when the terminal device receives the channel state information report activation When indicating, the channel state information is indicated by using the buffer data size in the BSR MAC CE to be a specific value of 0.
The method according to any one of claims 1-3, wherein the method further comprises:

Perform a neighborhood measurement.
The method of claim 4, wherein the method further comprises:

Receiving a neighboring cell measurement instruction from the network device, where the neighboring cell measurement instruction is used to instruct the terminal device to perform neighboring cell measurement.
The method according to claim 5, wherein the neighbor cell measurement indication is further used to instruct the terminal device to perform neighbor cell measurement during the inactive time of discontinuous reception of DRX.
The method according to any one of claims 1-6, wherein the method further comprises:

Receive first information from the network device, where the first information is used to indicate at least one of the following: the network device supports mobility enhancement, and the network device allows the terminal device to perform neighbor cell measurement in the RRC connected state The network device allows the terminal device to perform co-frequency measurement in the RRC connected state, the network device allows the terminal device to perform inter-frequency measurement in the RRC connected state, and the network device allows the terminal device to perform discontinuous reception The inactive time of DRX is measured.
The method according to any one of claims 1-7, wherein the method further comprises:

Send second information to the network device, where the second information is used to indicate at least one of the following: the terminal device supports mobility enhancement, the terminal device supports neighbor cell measurement in the RRC connected state, and the terminal device Supports intra-frequency measurement in the RRC connected state, the terminal device supports inter-frequency measurement in the RRC connected state, and the terminal device supports measurement or DRX preference indication during the inactive time of DRX; the DRX preference indication is used to indicate The DRX cycle preferred by the terminal device, and the DRX cycle is used for neighbor cell measurement.
The method according to any one of claims 1-3, wherein the method further comprises:

Receiving first indication information from the network device, where the first indication information is used to instruct the terminal device to enter the RLF;

It is determined that the access to the radio link fails RLF, and the radio resource control RRC connection re-establishment procedure is executed.
The method according to claim 9, characterized in that it comprises:

The RLF is a false RLF, and the false RLF is a radio link failure that does not meet the signal conditions for the terminal device to enter the RLF; or

The RLF is an advanced RLF, and the advanced RLF is a radio link failure of the terminal device before reaching the signal condition for entering the RLF.
The method according to any one of claims 1-10, wherein the method further comprises:

Receiving second indication information from the network device, where the second indication information is used to indicate that the terminal device is allowed to send the channel state information to the network device.
The method according to any one of claims 1-11, wherein the channel state parameters comprise at least one of the following: reference signal received power (RSRP), reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR), signal to noise Ratio SNR, the number of successful reception repetitions, the number of retransmissions, the coverage enhancement level, the transmission power, the downlink radio link block error rate, and the link level at which the assumed PDCCH can be reliably received with a specific block error rate.
The method according to any one of claims 1-12, wherein determining that the evaluation value of the channel state parameter satisfies a preset condition comprises:

It is determined that the evaluation value of the channel state parameter is less than a first threshold value, and the first threshold value is configured by the network device.
A communication method, characterized in that the method is suitable for network equipment, and includes:

Sending first capability indication information to a terminal device, where the first capability indication information is used to indicate that the network device supports receiving channel state information;

Receive channel state information from the terminal device, where the channel state information is used to indicate at least one of the following: channel state deterioration, about to enter the radio link failure RLF, and neighbour cell measurement is required.
The method of claim 14, comprising:

The channel state information is received through the MAC CE of the media access control layer control unit of the channel quality report, and the quality report field in the MAC CE of the channel quality report is used to indicate the channel state information; or

The channel state information is received through the MAC CE of the buffer state report BSR, and the fields in the BSR MAC CE are used to indicate the channel state information when the following one is satisfied: the buffer data size is a specific value, and the logical channel group Identifies that the LCG ID is a specific value, the LCG ID is a specific value, and the cache data size is a specific value; or

The channel state information is received through the PDU subheader of the MAC packet data unit.
The method of claim 15, wherein the method further comprises:

When the terminal device is not configured to release the auxiliary information activation indication, indicate the channel state information by using the buffer data size in the BSR MAC CE to be a specific value of 0; or

Send a channel state information report activation instruction to the terminal device, where the channel state information report activation instruction is used to instruct the terminal device to report the channel state information; when the network device sends the channel state information report activation instruction When the buffer data size in the BSR MAC CE is a specific value of 0, the channel state information is indicated.
The method according to any one of claims 14-16, wherein the method further comprises:

Sending a neighboring cell measurement instruction to the terminal device, where the neighboring cell measurement instruction is used to instruct the terminal device to perform neighboring cell measurement.
The method according to claim 17, wherein the neighbor cell measurement indication is further used to instruct the terminal device to perform neighbor cell measurement during the inactive time of discontinuous reception of DRX.
The method according to any one of claims 14-18, wherein the method further comprises:

Send first information to the terminal device, where the first information is used to indicate at least one of the following: the network device supports mobility enhancement, the network device allows the terminal device to perform neighbor cell measurement in the RRC connected state, The network device allows the terminal device to perform co-frequency measurement in the RRC connected state, the network device allows the terminal device to perform inter-frequency measurement in the RRC connected state, and the network device allows the terminal device to receive DRX discontinuously. The inactive time is measured.
The method according to any one of claims 14-19, wherein the method further comprises:

Receive second information from the terminal device, where the second information is used to indicate at least one of the following: the terminal device supports mobility enhancement, the terminal device supports neighbor cell measurement in the RRC connected state, and the terminal device The device supports intra-frequency measurement in the RRC connected state, the terminal device supports inter-frequency measurement in the RRC connected state, and the terminal device supports measurement or DRX preference indication during the inactive time of DRX; the DRX preference indication is used for Indicate the DRX cycle preferred by the terminal device, and the DRX cycle is used for neighbor cell measurement.
The method according to any one of claims 14-16, wherein the method further comprises:

Sending first indication information to the terminal device, where the first indication information is used to instruct the terminal device to enter the RLF.
The method of claim 21, comprising:

The RLF is a false RLF, and the false RLF is a radio link failure that does not meet the signal conditions for the terminal device to enter the RLF; or

The RLF is an advanced RLF, and the advanced RLF is a radio link failure of the terminal device before reaching the signal condition for entering the RLF.
The method according to any one of claims 14-22, wherein the method further comprises:

Sending second indication information to the terminal device, where the second indication information is used to indicate that the terminal device is allowed to send the channel state information to the network device.
The method according to any one of claims 14-23, wherein the channel state parameters comprise at least one of the following: reference signal received power (RSRP), reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR), signal to noise Ratio SNR, the number of successful reception repetitions, the number of retransmissions, the coverage enhancement level, the transmission power, the downlink radio link block error rate, and the link level at which the assumed PDCCH can be reliably received with a specific block error rate.
A communication device, characterized in that it comprises a processor and a transceiver, wherein:

The transceiver is used to send and receive data;

The processor, coupled with the memory, is configured to call the program in the memory to enable the communication device to execute the method according to any one of claims 1-13.
A communication device, characterized in that it comprises a processor and a transceiver, wherein:

The transceiver is used to send and receive data;

The processor, coupled with the memory, is configured to call the program in the memory to make the communication device execute the method according to any one of claims 14-24.
A computer-readable storage medium, characterized by comprising instructions, which when run on a computer, causes the computer to execute the method according to any one of claims 1-24.
A computer program product containing instructions, characterized in that, when the computer program product runs on a computer, the computer is caused to execute the method according to any one of claims 1-24.
A chip, characterized by comprising a processor and a communication interface, the processor, coupled with the memory, for calling the program in the memory so that the chip executes any one of claims 1-24 Methods.