WO2022027296A1 - Communication method, and device therefor - Google Patents

Abstract

Disclosed is a communication method, which is used in the technical field of communications. The method of the embodiments of the present application comprises: a terminal device starting neighbor cell measurement according to preset information, wherein the preset information comprises at least one of the following: a moving state of the terminal device, an operating state of a timer T310 of the terminal device, the count of a counter N310 of the terminal device, and the quantity of a channel state of the terminal device; and the terminal device initiating radio resource control (RRC) connection reestablishment to a target cell according to a measurement result of the neighbor cell measurement. In the embodiments of the present application, neighbor cell measurement is performed before a radio link failure (RLF) occurs, thereby reducing a delay caused by performing neighbor cell measurement after an RLF occurs.

Description

A communication method and device thereof technical field

The present application relates to the field of communication technologies, and in particular, to a communication method and device thereof.

Background technique

With the development of long term evolution (LTE) and fifth generation (5th generation, 5G) communication technologies, narrowband internet of things (NB-IoT), enhanced machine type communication (eMTC) ) technology has also been developed by leaps and bounds. The terminal equipment of NB-IoT and eMTC has the characteristics of low complexity, low cost, low power consumption and low bandwidth, and is suitable for a wide range of IoT scenarios. At present, the new radio-Light (NR-Light) and reduced capability (REDCAP) access technologies in 5G have won extensive discussion and attention. They are generated 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, such terminal equipment does not support the function of cell handover. Therefore, when this type of terminal equipment moves from cell A to cell B, a radio link failure (RLF) occurs due to signal deterioration, and then the connection re-establishment process through radio resource control (RRC) occurs. Rebuild to B cell.

When such terminal equipment detects RLF, such terminal equipment will use a lot of time to perform cell search to find a suitable cell for RRC connection re-establishment, which will cause a large delay in changing cells.

SUMMARY OF THE INVENTION

The embodiment of the present application provides a communication method and device thereof, when the terminal device starts neighbor cell measurement according to preset conditions before the occurrence of radio link failure RLF, and performs radio resource control with the target cell after the occurrence of RLF according to the measurement result The RRC connection saves the time for measuring neighboring cells after the occurrence of RLF, and reduces the time delay of changing cells.

A first aspect of the embodiments of the present application provides a communication method.

The terminal device starts neighbor cell measurement according to preset information before the radio link failure RLF occurs, and the preset information may include at least one of the following: the movement state of the terminal device, the running state of the timer T310 of the terminal device, and the counter N310 of the terminal device Count, the channel state quantity of the terminal device. After the neighbor cell measurement is performed, and after the RLF occurs, the terminal device initiates a radio resource control RRC connection re-establishment to the target cell according to the measurement result of the neighbor cell measurement.

In the embodiment of the present application, the terminal device performs neighbor cell measurement according to preset information before RLF, and after obtaining the measurement result, initiates RRC connection re-establishment to the target cell according to the measurement result, which saves the need to perform neighbor cell measurement after RLF occurs. time, reducing the delay of changing cells.

Based on the method of the first aspect of this embodiment of the present application, in a possible implementation manner, when the preset information includes the movement state of the terminal device, the terminal device starting the neighbor cell measurement according to the preset information may specifically include: when the first preset information includes: Assuming that the variation of the channel state quantity within the time period is greater than or equal to the first threshold value, the terminal device determines that the terminal device is in a high-speed moving state. When the terminal device determines that it is in a high-speed moving state, the terminal device starts neighbor cell measurement.

In the embodiment of the present application, the terminal device determines that it is in a high-speed motion state by the RSRP variation, and then starts the adjacent cell measurement, which reduces the power consumption caused by frequently starting the adjacent cell measurement.

Based on the method of the first aspect of this embodiment of the present application, in a possible implementation manner, when the preset information includes the movement state of the terminal device, the terminal device starting the neighbor cell measurement according to the preset information may specifically include: when the second preset information includes the movement state of the terminal device. It is assumed that the terminal device determines that it is in a high-speed moving state when the number of cells to be replaced by the terminal device within the time period is greater than or equal to the second threshold value. After the terminal device determines that it is in a high-speed moving state, the terminal device starts neighbor cell measurement.

In this embodiment of the present application, when the terminal device determines that the number of cells to be replaced within the second preset time period is greater than the second threshold value, it determines that it is in a high-speed movement state, and then starts neighbor cell measurement, which reduces the need for frequent neighbor cell activation. Measure the resulting power consumption.

Based on the method of the first aspect of this embodiment of the present application, in a possible implementation manner, when the preset information includes the running state of the timer T310 of the terminal device, the terminal device starting the neighbor cell measurement according to the preset information may specifically include: when the preset information includes the running state of the timer T310 of the terminal device. The running state of the timer T310 of the terminal device is when the timer T310 is started, that is, when the timer T310 is started, the terminal device starts the neighbor cell measurement.

In the embodiment of the present application, when the terminal device determines that T310 is started, it means that the terminal device has received consecutive out-of-sync indications for a certain number of times, so it means that the communication quality between the terminal device and the serving cell is poor, so the neighbor cell measurement is started at this time, Measurement results can be obtained as soon as possible for subsequent RRC reconstruction.

Based on the method of the first aspect of the embodiment of the present application, in a possible implementation manner, when the preset information includes the count of the counter N310 of the terminal device, the terminal device starting the neighbor cell measurement according to the preset information may include: when the terminal device's counter N310 counts. When the count of the counter N310 is greater than or equal to the third threshold value, the terminal device starts the neighbor cell measurement.

In the embodiment of the present application, when the count of the counter N310 of the terminal device is greater than or equal to the third threshold value, it means that the terminal device has received or has received multiple consecutive out-of-sync indications reported by the bottom layer, so it indicates that the terminal device has a relationship with the serving cell. If the communication quality is poor, the neighbor cell measurement is started at this time, and the measurement result can be obtained as soon as possible for subsequent RRC reconstruction.

Based on the method of the first aspect of this embodiment of the present application, in a possible implementation manner, when the preset information includes the channel state quantity of the terminal device, the terminal device starting the neighbor cell measurement according to the preset information may include: when the preset information includes: When the channel state quantity is less than or equal to the fourth threshold value, the terminal device starts neighbor cell measurement.

In the embodiment of the present application, when the channel state quantity of the terminal device is less than or equal to the fourth threshold value, it indicates that the communication quality between the terminal device and the serving cell is poor, and the neighbor cell measurement is started at this time, and the measurement result can be obtained as soon as possible. for subsequent RRC reconstruction.

Based on the method of the first aspect of the embodiment of the present application, in a possible implementation manner, before the terminal device starts the neighbor cell measurement according to the preset information, the terminal device receives a target message sent by the network device corresponding to the serving cell, the target message Include preset information.

In the embodiment of the present application, by receiving the preset information from the network device corresponding to the serving cell, the implementability of the solution is improved.

Based on the method of the first aspect of the embodiments of the present application, in a possible implementation manner, the terminal device initiating the RRC connection re-establishment to the target cell according to the measurement result of the neighbor cell measurement may include: after the terminal device generates RLF, the terminal device The device initiates RRC connection re-establishment to the target cell according to the measurement result of the neighbor cell measurement.

In the embodiment of the present application, after the RLF occurs, the RRC connection re-establishment is initiated to the target cell, which does not affect the RLF mechanism and the RRC connection re-establishment process in the prior art, and improves the achievability of the solution.

Based on the method of the first aspect of the embodiment of the present application, in a possible implementation manner, the channel state quantity may include at least one of the following: reference signal received power (reference signal received power, RSRP), reference signal received quality (reference signal received power) quality, RSRQ), signal to interference plus noise ratio (SINR), signal-noise ratio (signal-noise ratio, SNR), the number of successful reception repetitions, the number of repeated transmissions, coverage enhancement level, transmit power, Downlink radio block error rate, link level at which the assumed PDCCH is reliably received at a specified block error rate.

In the embodiment of the present application, the information specifically included in the channel state quantity is exemplarily described, which improves the implementability of the solution.

Based on the method of the first aspect of the embodiment of the present application, in a possible implementation manner, the terminal device performs neighbor cell measurement according to a configured measurement object, and the configured measurement object is sent to the terminal device by the serving cell.

In the embodiment of the present application, it is described that the neighbor cell measurement can be performed according to the configured object, which speeds up the cell search.

Based on the method of the first aspect of the embodiment of the present application, in a possible implementation manner, the terminal device performs neighbor cell measurement according to a configured cell list, and the configured cell list is sent by the serving cell to the terminal device.

In the embodiment of the present application, it is described that the neighbor cell measurement can be performed according to the configured cell list, which speeds up the cell search.

Based on the method of the first aspect of the embodiment of the present application, in a possible implementation manner, the terminal device performs neighbor cell measurement according to the configured frequency point to be measured, and the configured frequency point to be measured is sent to the terminal device by the serving cell.

In the embodiment of the present application, it is described that the neighbor cell measurement can be performed according to the configured frequency point to be measured, which speeds up the cell search.

Based on the method of the first aspect of the embodiments of the present application, in a possible implementation manner, the terminal device performs neighbor cell measurement in a blind search manner.

In the embodiments of the present application, it is described that the neighbor cell measurement can be performed according to a blind search manner, which improves the practicability of the solution.

Based on the method of the first aspect of the embodiment of the present application, in a possible implementation manner, the target message may include at least one of the following: a system message sent by the serving cell, an RRC connection setup (RRC connection setup) message sent by the serving cell, an RRC Connection reconfiguration (RRC connection reconfiguration) message, RRC connection resume (RRC connection resume) message.

In the embodiment of the present application, the specific sending method of the target message is described, which reduces the waste of wireless resources caused by sending the preset information separately.

A first aspect of the embodiments of the present application provides a terminal device.

A terminal device including:

A starting unit, configured to start neighbor cell measurement according to preset information, the preset information includes at least one of the following: the movement state of the terminal device, the running state of the timer T310 of the terminal device, the count of the counter N310 of the terminal device, the channel state of the terminal device quantity;

The processing unit is configured to initiate radio resource control RRC connection re-establishment to the target cell according to the measurement result of the neighbor cell measurement.

Optionally, when the preset information includes the movement state of the terminal device, the terminal device further includes:

a determining unit, configured to determine that the terminal device is in a high-speed moving state when the variation of the channel state quantity within the first preset time period is greater than or equal to the first threshold value;

The starting unit is specifically configured to start the neighbor cell measurement according to the terminal equipment being in a high-speed moving state.

Optionally, when the preset information includes the movement state of the terminal device, the terminal device further includes:

a determining unit, configured to determine that the terminal device is in a high-speed movement state when the number of cells to be replaced by the terminal device within the second preset time period is greater than or equal to the second threshold;

The starting unit is specifically configured to start the neighbor cell measurement according to the terminal equipment being in a high-speed moving state.

Optionally, the preset information includes the running state of the timer T310 of the terminal device, and the starting unit is specifically configured to enable the terminal device to start neighbor cell measurement when the running state of the timer T310 of the terminal device is running.

Optionally, when the preset information includes the count of the counter N310 of the terminal device, the starting unit is specifically configured to start the neighbor cell measurement of the terminal device when the count of the counter N310 is greater than or equal to the third threshold value.

Optionally, when the preset information includes the channel state quantity of the terminal device, the starting unit is specifically configured to start the neighbor cell measurement of the terminal device when the channel state quantity is less than or equal to the fourth threshold value.

Optionally, the terminal device further includes:

The receiving unit is configured to receive a target message sent by a network device corresponding to the serving cell, where the target information includes preset information.

Optionally, the processing unit is specifically configured to initiate an RRC connection re-establishment under the infinite resource control to the target cell according to the measurement result of the neighbor cell measurement after the radio link failure RLF occurs in the terminal device.

A third aspect of the present application provides a computer storage medium, where instructions are stored in the computer storage medium, and when the instructions are executed on a computer, the instructions cause the computer to execute the method according to the embodiment of the first aspect of the present application.

A fourth aspect of the present application provides a computer program product, which, when executed on a computer, causes the computer to execute the method according to the embodiment of the first aspect of the present application.

A fifth aspect of the present application provides a communication device, the communication device includes a processor and a memory, a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the communication device performs the first aspect of the present application. method of implementation.

In the technical solutions provided by the embodiments of the present application, the terminal equipment that does not support cell handover starts neighbor cell measurement according to preset conditions before the occurrence of radio link failure RLF, and performs radio resource control RRC with the target cell after the occurrence of RLF according to the measurement result. The connection saves the time for neighbor cell measurement after the occurrence of RLF, and reduces the time delay of changing cells.

Description of drawings

1 is a schematic diagram of a framework of a communication method in an embodiment of the application;

2 is a schematic flowchart of a communication method in an embodiment of the application;

3 is a schematic structural diagram of a terminal device in an embodiment of the present application;

FIG. 4 is another schematic structural diagram of a terminal device in an embodiment of the present application;

FIG. 5 is another schematic structural diagram of a terminal device in an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

An embodiment of the present application provides a communication method, for in a communication system, before a radio link failure RLF occurs, a terminal device starts neighbor cell measurement according to a preset condition, and after the RLF occurs according to the measurement result of the neighbor cell measurement The radio resource control RRC connection with the target cell saves the time for neighbor cell measurement after RLF occurs, and reduces the time delay of changing cells.

Please refer to FIG. 1 , which is a schematic diagram of a communication system provided in the present application.

As shown in FIG. 1 , the communication system includes a network device 101 , a network device 102 , and a terminal device 103 . The network device 101 is a network device corresponding to a serving cell of the terminal device 103, and the terminal device 103 communicates with the serving cell within the coverage of the serving cell. The network device 102 is a network device corresponding to a neighboring cell. The neighboring cell is a neighboring cell of the serving cell. The terminal device moves from the serving cell to the coverage of the neighboring cell and needs to establish a connection with the neighboring cell. It should be noted that the network equipment and terminal equipment included in the communication system as shown in FIG. 1 are only an example. In this embodiment of the present application, the type, quantity and The connection relationship between the network elements is not specifically limited here.

A communication system supporting fourth generation (4G) access technology, such as long term evolution (LTE) access technology; alternatively, the communication system may also support fifth generation (5G) access technology Access technology communication system, such as new radio (new radio, NR) access technology; or, the communication system may also be a communication system supporting multiple wireless technologies, such as a communication system supporting LTE technology and NR technology. In addition, the communication system can also be adapted to future-oriented communication technologies.

The network device 101 and the network device 102 in FIG. 1 may be devices on the access network side used to support the terminal device 103 to access the communication system, for example, may be an evolved base station (evolved nodeB, eNB) in a 4G access technology communication system , Next generation nodeB (gNB), transmission reception point (TRP), relay node (relay node), access point (AP), etc. in the 5G access technology communication system , which is not specifically limited here.

The terminal device 103 in FIG. 1 may be a device that provides voice or data connectivity to users, for example, may also be referred to as user equipment (user equipment, UE), mobile station (mobile station), subscriber unit (subscriber unit), Station (station), terminal equipment (terminal equipment, TE), etc. The terminal may be a cellular phone, a personal digital assistant (PDA), a wireless modem, a handheld, a laptop computer, a cordless phone, a wireless Local loop (wireless local loop, WLL) station, tablet computer (pad), etc. With the development of wireless communication technologies, devices that can access the communication system, communicate with the network side of the communication system, or communicate with other objects through the communication system can be the terminals in the embodiments of the present application, for example, intelligent transportation Terminals and automobiles in China, household equipment in smart homes, power meter reading instruments in smart grids, voltage monitoring instruments, environmental monitoring instruments, video monitoring instruments in smart security networks, cash registers, related products in smart cities, etc. Wait.

In the communication system of FIG. 1 , the terminal device 103 has established a communication connection with the serving cell. When the terminal device 103 moves from the serving cell to the neighboring cell, since the terminal device 103 does not support the function of cell handover, the terminal device 103 will generate RLF at the edge of the serving cell due to signal deterioration, and then determine one through cell selection. A suitable cell is used as the target cell, and RRC connection re-establishment is performed to the target cell. In the prior art, in the process of moving from a serving cell to a neighboring cell, the terminal device 103 performs operations such as neighboring cell measurement to select a suitable target cell from neighboring cells after RLF occurs, and operations such as neighboring cell measurement A certain amount of time is required, and therefore, the time during which the terminal device 103 cannot be connected for communication increases. Furthermore, the present application provides a communication method, and specific reference is made to the following embodiments.

It should be noted that the neighbor cell measurement in this application may include at least one of the following: cell measurement on the same frequency as the serving cell, cell measurement on a different frequency from the serving cell, and cell measurement on a different system from the communication system where the serving cell is located. .

In this application, a radio link failure (radio link failure, RLF) refers to the interruption of a 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 continues for a certain period of time and still does not restore the physical layer connection, the terminal device enters the RRC idle state from the RRC connected state. Correspondingly, the occurrence of 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 "occurrence of RLF" can also be understood as entering the RLF state, or occurrence of RLF. Further, in this state, the terminal device will initiate RRC connection re-establishment.

It should be noted that the neighboring cell, serving cell, and target cell described in the embodiments of the present application may be respectively represented as network equipment corresponding to the neighboring cell, network equipment corresponding to the serving cell, and network equipment corresponding to the target cell.

The network device in this embodiment of the present application is an entity on the network side that is used to transmit or receive signals. For example, the network device may be an evolved NodeB (evolved NodeB, eNB), a transmission point (transmission reception point, TRP), a next generation NodeB (gNB) in an NR system, a transmission reception point (transmission reception point, TRP) ), relay node (RN), access point (AP), base stations in other future mobile communication systems or access nodes in WiFi systems, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

The communication method in the embodiment of the present application will be described below with reference to the framework of the communication system in FIG. 1 .

Please refer to FIG. 2 , which is a schematic flowchart of an embodiment of the communication method provided by the present application.

In step 201, the terminal device starts neighbor cell measurement according to preset information.

During the process of the terminal equipment moving toward, the terminal equipment starts neighbor cell measurement according to preset information, and the preset information includes at least one of the following: the movement status of the terminal equipment, the running status of the timer T310 of the terminal equipment, and the counter N310 of the terminal equipment Count, the channel state quantity of the terminal device.

In this embodiment of the present application, the preset information may be specified by the protocol, that is, when the terminal device starts the neighbor cell measurement in the corresponding execution, the neighbor cell measurement is started according to the preset information specified in the protocol. Alternatively, the preset information may also be sent by the network device (ie, the network device corresponding to the serving cell) to the terminal device. In a possible implementation manner, when the serving cell sends the system information to the terminal device, the system information carries the preset information. Or, in a possible implementation manner, when the serving cell and the terminal device initially establish an RRC connection, the preset information is sent through RRC signaling. For example, the preset information can be sent through signaling such as RRC connection setup, RRC connection reconfiguration, and RRC connection resume. The method for acquiring preset information is not specifically limited in this embodiment of the present application.

In a possible implementation manner, when the preset information is sent by the serving cell to the terminal device, the preset information may further include first indication information, where the first indication information is used to indicate whether the terminal device is allowed to use the preset information according to the preset information. The message initiates neighbor measurement. In the actual application process, there are some scenarios, so that the terminal equipment does not need to use the preset information to start the neighbor cell measurement. Therefore, the serving cell will start the neighbor cell measurement according to whether different terminal equipment needs to start the neighbor cell measurement according to the preset information. Different terminal devices send the first indication information. For example, a power meter reading instrument in a smart grid receives preset information sent by a serving cell, and the preset information includes first indication information, which indicates that the power meter reading instrument is not allowed to start according to the preset information Neighborhood measurements. Because the power meter reading instrument is fixed at position A, which is within the coverage of the serving cell and also within the coverage of neighboring cells, when the power meter reading instrument meets the conditions in the preset information, If not specified, the power meter reading instrument will start the neighboring area measurement according to the preset information. The power meter reading instrument is used in a fixed location and does not move. The coverage of the cell is also fixed under certain circumstances, so there is no need to replace the cell, which can save the network equipment corresponding to the call. Wireless resources can also reduce the power consumption of the power meter reading instrument due to the measurement of neighboring areas.

In a possible implementation manner, when the preset information is sent by the serving cell to the terminal device, the preset information may further include second indication information, where the second indication information is used to indicate that in discontinuous reception (Discontinuous Reception, Whether the terminal device is allowed to use the gap resource scheduled by the non-network device to perform neighbor cell measurement during the inactive time of DRX).

In a possible implementation manner, when the preset information is sent by the serving cell to the terminal device, the preset information may further include third indication information, where the third indication information is used to instruct the terminal device to perform neighbor cell measurement parameters . Wherein, the parameters measured by the neighboring cell may include at least one of the following:

Measurement object: Indicates the frequency and/or time position and/or subcarrier spacing of the reference signal to be measured. Associated with this measurement object, the network may configure a list of cell-specific offsets, a list of "blacklisted" cells, and a list of "whitelisted" cells, such as the physical cell ID (PCI) of the whitelisted cells, The connected state cell search can be restricted to these whitelisted cells, or excluded from the blacklisted cells.

The raster offset of the inter-frequency neighbors.

The time offset of each neighbor cell relative to the serving cell, for example, the frame offset relative to the frame time of the serving cell, the UE can perform timing and frequency error correction faster using this information.

The offset of the neighboring cell system frame number (SFN) relative to the serving cell system frame number at the 80ms frame boundary.

Specifically, in a possible implementation manner, when the preset information includes the movement state of the terminal device, the terminal device determines whether to start the neighbor cell measurement according to the movement state of the terminal device. In the actual application process, when the mobile state of the terminal device is in the moving or high-speed moving state, the terminal device starts the neighbor cell measurement.

Specifically, in a possible implementation manner, when the variation of the channel state quantity within the first preset interval meets the first threshold, the terminal device determines that it is in a high-speed moving state. For example, within 1s, if the variation of the reference signal received power (RSRP) received by the terminal device is greater than or equal to the first threshold value, the terminal device determines that it is in a high-speed mobile state. When the terminal device determines that it is in a high-speed moving state, the terminal device starts neighbor cell measurement. It can be understood that the channel state may also include other channel states, such as reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR), signal-to-noise ratio (SINR), and signal-to-interference plus noise ratio (SINR). (signal-noise ratio, SNR), the number of successful reception repetitions, the number of repeated transmissions, the coverage enhancement level, the transmit power, the downlink wireless block error rate, the link level of the assumed PDCCH for reliable reception at a specific block error rate, etc. There is no limitation here.

In a possible implementation manner, when the number of cells to be replaced by the terminal device within the second preset time period is greater than or equal to the second threshold value, the terminal device determines that it is in a high-speed moving state. For example, in the scenario where the high-speed rail moves at high speed, the terminal equipment passes through 10 cells within 300 seconds. In this case, the neighbor cell measurement needs to be started. In the actual application process, when the terminal equipment is in a high-speed moving state, RLF occurs frequently, and the cell selection is performed to change the cell after the RLF occurs, which will bring more delay. Therefore, when the terminal equipment is in a high-speed mobile state, in order to reduce the delay caused by switching cells, neighbor cell measurement can be performed before the RLF to reduce the delay caused by the terminal equipment switching cells.

In a possible implementation manner, when the preset information includes the running state of the timer T310 of the terminal device, the terminal device determines whether to start the neighbor cell measurement according to the running state of the timer T310. Specifically, when the running state of the timer T310 of the terminal device is running, the terminal device starts the neighbor cell measurement.

In a possible implementation manner, when the preset information includes the count of the counter N310 of the terminal device, the terminal device determines whether to start the neighbor cell measurement according to the count of the counter N310. Specifically, when the count of the counter N310 of the terminal device is greater than or equal to the third threshold value, the terminal device starts the neighbor cell measurement. For example, when the terminal device receives an out of sync indication (out of sync indication), the terminal device starts the counter N310 to start counting. When the N310 counts up to 5 times, that is, when 5 consecutive out-of-sync indications are received continuously, it means that the terminal equipment may be in a place where the signal of the serving cell is relatively weak, and the terminal equipment starts the neighbor cell measurement. For example, the third threshold value can be set to 0, that is, when the N310 count is started, the neighbor cell measurement is started. It can be understood that, in an actual application process, the third threshold value can be set according to actual needs, which is not specifically limited here.

In a possible implementation manner, when the preset information includes the channel state quantity of the terminal device, the terminal device starts the neighbor cell measurement according to the channel state quantity of the terminal device meeting the fourth threshold value. Specifically, in a possible implementation manner, the channel state quantity may include at least one of the following: RSRP, RSRQ, SINR, SNR, the number of successful reception repetitions, the number of repeated transmissions, the coverage enhancement level, and the transmission power. In practical applications In the process, more channel state quantities may also be included, such as the downlink radio link block error rate, the link level of the assumed PDCCH that is reliably received at a specific block error rate, etc., which are not specifically limited here. It can be understood that, when there are multiple channel state quantities, there are multiple fourth threshold values correspondingly. For example, after the terminal equipment obtains the reference signal received power (RSRP), the reference signal received power is less than -100, indicating that the reference signal of the area where the terminal equipment is located and the serving cell are weak, and the terminal equipment starts neighbor cell measurement. For another example, when the RSRQ is less than or equal to the fourth threshold value, and or, the SINR is less than or equal to the fourth threshold value, and or, the SNR is less than or equal to the fourth threshold value, and or, the number of successful reception repetitions is greater than the fourth threshold value. The threshold value, and or, the coverage enhancement level is higher than the fourth threshold value, and or, the transmit power is greater than the fourth threshold value, then start the neighbor cell measurement. It should be noted that, in the actual application process, the terminal device may start the neighbor cell measurement only when multiple channel state quantities meet the fourth threshold, or it may be when one channel state quantity meets the fourth threshold. The neighbor cell measurement can also be started when all the channel state quantities defined by the protocol or all the channel state quantities included in the preset information sent by the network device to the terminal device meet the fourth threshold value. Because in the actual application process, it may not be possible to determine that the communication quality between the terminal equipment and the serving cell is poor through only one channel state quantity. Therefore, in some scenarios, multiple channel state quantities may be required to jointly determine the terminal equipment. The communication quality with the serving cell is poor, and the neighbor cell measurement is started. In a possible implementation manner, the neighbor cell measurement is started only when the channel state quantity satisfies the fourth threshold value for a duration greater than or equal to T1. Because in some scenarios, the channel state quantity of the terminal device will temporarily deteriorate the communication quality with the serving cell due to the occlusion of objects and other reasons. In this case, it is not necessary to enable neighbor measurement, so a time period is set. The value T1 of , enables the terminal device to start the neighbor cell measurement at a more accurate time, reducing the power and wireless resources consumed by starting the neighbor cell measurement due to the short-term deterioration of the communication quality with the serving cell.

After the terminal device starts the neighbor cell measurement according to the preset information, the terminal device can perform the neighbor cell measurement according to the parameters of the neighbor cell measurement. Specifically, when the parameter measured by the neighbor cell includes the measured object, the terminal device performs signal measurement on the measured object. When the parameters measured in the adjacent cells include the frequency point information to be measured, the terminal device obtains the specific frequency point to be measured according to the frequency point information to be measured, and then measures the signal of the frequency point to be measured. Or, when the parameters of the neighbor cell measurement include the cell list, the terminal device performs one-by-one corresponding signal measurement according to the cells on the cell list. When an appropriate cell is selected, the cell is used as the target cell, which can be used for subsequent RRC re-establishment. When the terminal device does not receive the parameters of the neighbor cell measurement, the terminal device can also perform the neighbor cell measurement in a blind search manner, which is not specifically limited here.

After starting the neighbor cell measurement, the terminal equipment needs to use the time domain resources for measurement. When the preset information includes the second indication information, the terminal device can judge whether the time-frequency domain resources scheduled by the non-network device can be used for measurement according to the second indication information. For example, when the second indication information indicates that the terminal device can use the DRX inactive time to perform measurement, the terminal device can use the corresponding time domain resource to perform neighbor cell measurement during the DRX inactive period. Using time domain resources scheduled by non-network equipment to perform neighbor cell measurement can increase the flexibility of neighbor cell measurement. When the second indication information indicates that the terminal device cannot use the time domain resources scheduled by the non-network device, the terminal device can only perform neighbor cell measurement through the time domain resources scheduled by the network device. In this case, the terminal device can choose whether to notify the The serving cell initiates neighbor measurement. Because in the actual application process, when the terminal device performs neighbor cell measurement through the time domain resources scheduled by the network device, the network device may still schedule the terminal device. Therefore, the terminal device notifies the serving cell to start the neighbor cell measurement. The cell stops scheduling, saving energy consumption and radio resources of the network equipment corresponding to the serving cell. Or, in the actual application process, the terminal device thinks that the quality of communication with the network device is already very poor, so the terminal device directly starts the neighbor cell measurement without notifying the network device, which can save signaling resources and save the energy consumption of the terminal device. At the same time, the network device can stop scheduling the terminal device within a certain period of time after it cannot connect with the terminal device, which saves the complexity of implementation.

In a possible implementation manner, before starting the neighbor cell measurement, the terminal device may also send capability indication information to the serving cell, where the capability indication information is used to indicate whether the terminal device supports the use of the DRX mode. For example, when the terminal device supports the use of the DRX mode, the serving cell may determine whether to allow the terminal device to use the time domain resources scheduled by the non-network device to perform neighbor cell measurement during the DRX inactive time according to the actual situation.

In a practical application process, after the terminal device starts the neighbor cell measurement, in a possible implementation manner, the terminal device can also stop the neighbor cell measurement according to the preset information.

Specifically, in a possible implementation manner, when the preset information includes the movement state of the terminal device, the terminal device determines whether to stop the neighbor cell measurement according to the movement state of the terminal device. In the actual application process, when the movement state of the terminal device is in a non-high-speed movement state, the terminal device stops the neighbor cell measurement.

Specifically, in a possible implementation manner, when the variation of the channel state of the terminal device within the first preset interval does not meet the first threshold value, the terminal device determines that it is in a non-high-speed moving state. For example, within 1s, if the variation of the reference signal received power (reference signal received power, RSRP) received by the terminal device is less than the first threshold value, the terminal device determines that it is in a non-high-speed mobile state. When the terminal device determines that it is in a non-high-speed moving state, the terminal device stops the neighbor cell measurement. It can be understood that the channel state may also include other channel states, such as reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR), signal-to-noise ratio (SINR), and signal-to-interference plus noise ratio (SINR). (signal-noise ratio, SNR), the number of successful reception repetitions, the number of repeated transmissions, the coverage enhancement level, the transmit power, the downlink wireless block error rate, the link level of the assumed PDCCH for reliable reception at a specific block error rate, etc. There is no limitation here.

In a possible implementation manner, when the number of cells replaced by the terminal device within the second preset time period is less than the second threshold value, the terminal device determines that it is in a non-high-speed moving state. For example, in the scenario of high-speed rail movement, the terminal equipment passes through 1 cell within 300 seconds. In this case, since the terminal equipment is in the same cell for a period of time, the neighbor cell measurement can be stopped. It saves the power consumption caused by the neighbor cell measurement performed by the terminal equipment.

In a possible implementation manner, when the preset information includes the running state of the timer T310 of the terminal device, the terminal device determines whether to stop the neighbor cell measurement according to the running state of the timer T310. Specifically, when the running state of the timer T310 of the terminal device is stopped, the terminal device stops the neighbor cell measurement.

In a possible implementation manner, when the preset information includes the count of the counter N311 of the terminal device, the terminal device determines whether to stop the neighbor cell measurement according to the count of the counter N311. Specifically, when the count of the counter N311 of the terminal device is greater than or equal to the third threshold value, the terminal device stops the neighbor cell measurement. For example, when the terminal device receives the synchronization indication (in sync indication), the terminal device starts the counter N311 to start counting. When the N311 count reaches 5 times, that is, when 5 consecutive synchronization instructions are received continuously, it means that the service of the serving cell has been gradually restored, and the possibility that the terminal equipment needs to change the cell is small, and the terminal equipment stops the neighbor cell measurement. For example, the third threshold value may also be set to 0, that is, when the synchronization indication is started to be received, the neighbor cell measurement is stopped. It can be understood that, in an actual application process, the third threshold value can be set according to actual needs, which is not specifically limited here.

In a possible implementation manner, when the preset information includes the channel state quantity of the terminal device, the terminal device stops the neighbor cell measurement when the channel state quantity of the terminal device satisfies the fourth threshold value. Specifically, in a possible implementation manner, the channel state quantity may include at least one of the following: RSRP, RSRQ, SINR, SNR, the number of successful reception repetitions, the number of repeated transmissions, the coverage enhancement level, and the transmission power. In practical applications In the process, more channel state quantities may also be included, such as the downlink radio link block error rate, the link level of the assumed PDCCH that is reliably received at a specific block error rate, etc., which are not specifically limited here. It can be understood that, when there are multiple channel state quantities, there are multiple fourth threshold values correspondingly. For example, after the terminal equipment obtains the reference signal received power (RSRP), the reference signal received power is greater than -90, indicating that the area where the terminal equipment is located and the reference signal of the serving cell are strong, and the terminal equipment stops neighbor cell measurement. For another example, when the RSRQ is greater than the fourth threshold, and or, the SINR is greater than the fourth threshold, and or, the SNR is greater than the fourth threshold, and or, the number of successful reception repetitions is less than the fourth threshold, and or , the coverage enhancement level is lower than the fourth threshold value, and or, if the transmit power is lower than the fourth threshold value, the neighbor cell measurement is stopped. It should be noted that, in the actual application process, the terminal device may stop the neighbor cell measurement only when multiple channel state quantities meet the fourth threshold value, or when one channel state quantity meets the fourth threshold value, To stop the neighbor cell measurement, the neighbor cell measurement may be stopped only when all the channel state quantities defined by the protocol or all the channel state quantities included in the preset information sent by the network device to the terminal device meet the fourth threshold value. Because in the actual application process, it may not be possible to determine that the communication quality between the terminal device and the serving cell has become better by only one channel state quantity. Therefore, in some scenarios, multiple channel state quantities may be required to jointly determine the terminal device. The communication quality between the device and the serving cell becomes better, and the neighbor cell measurement is stopped. In a possible implementation manner, the neighbor cell measurement is stopped only when the duration of the channel state quantity satisfying the fourth threshold value is greater than or equal to T2. Because in some scenarios, the channel state quantity of the terminal equipment will temporarily become better with the communication quality of the serving cell. In this case, it is not necessary to stop the neighbor cell measurement. Therefore, setting a time period value T2 can make the terminal equipment The device can stop the neighbor measurement at a more accurate time, which reduces the excessive power and wireless consumption when the neighbor measurement is stopped due to the short-term improvement of the communication quality with the serving cell, and the neighbor measurement needs to be restarted in a short time. resource.

In step 202, the terminal device initiates a radio resource control RRC connection re-establishment to the target cell according to the measurement result of the neighbor cell measurement.

The terminal device obtains the measurement result of the neighbor cell measurement after performing the neighbor cell measurement, and the terminal device initiates a radio resource control RRC connection re-establishment to the target cell according to the measurement result.

Specifically, when the measurement result of the neighbor cell measurement indicates that the target cell is a suitable cell, after the radio link failure RLF occurs, the terminal device initiates the RRC connection re-establishment to the target cell according to the measurement result.

It can be understood that when the measurement result of the neighbor cell measurement indicates that the signal quality of the serving cell is better, that is, when the target cell is the serving cell, after RLF occurs, the terminal device initiates an RRC connection to the target cell according to the measurement result. reconstruction.

In the embodiment of the present application, before the occurrence of RLF, the terminal device starts the neighbor cell measurement according to the preset information, and performs RRC connection re-establishment with the target cell after the RLF occurs according to the measurement result of the neighbor cell measurement, which saves the need for the neighbor cell after the RLF occurs. The time for cell measurement is reduced, and the delay in changing cells is reduced.

The communication method in the embodiment of the present application is described above, and the terminal device in the embodiment of the present application is described below. Please refer to FIG. 3 , which is a schematic structural diagram of the terminal device provided by the present application.

A terminal device including:

The starting unit 301 is configured to start neighbor cell measurement according to preset information, the preset information including at least one of the following: the movement state of the terminal device, the running state of the timer T310 of the terminal device, the count of the counter N310 of the terminal device, the channel of the terminal device state quantity;

The processing unit 302 is configured to initiate radio resource control RRC connection re-establishment to the target cell according to the measurement result of the neighbor cell measurement.

In this embodiment, the operations performed by each unit of the terminal device are similar to the steps performed by the terminal device in the foregoing embodiment shown in FIG. 2 , and details are not repeated here.

Please refer to FIG. 4 , which is a schematic structural diagram of a terminal device provided by the present application.

A terminal device including:

The starting unit 401 is configured to start neighbor cell measurement according to preset information, and the preset information includes at least one of the following: the movement state of the terminal device, the running state of the timer T310 of the terminal device, the count of the counter N310 of the terminal device, the channel of the terminal device state quantity;

The processing unit 402 is configured to initiate radio resource control RRC connection re-establishment to the target cell according to the measurement result of the neighbor cell measurement.

Optionally, when the preset information includes the movement state of the terminal device, the terminal device further includes:

Determining unit 403, configured to determine that the terminal device is in a high-speed moving state when the variation of the channel state quantity within the first preset time period is greater than or equal to the first threshold value;

The starting unit 401 is specifically configured to start the neighbor cell measurement according to the terminal device being in a high-speed moving state.

Optionally, when the preset information includes the movement state of the terminal device, the terminal device further includes:

A determining unit 403, configured to determine that the terminal device is in a high-speed movement state when the number of cells to be replaced by the terminal device within the second preset time period is greater than or equal to the second threshold;

The starting unit 401 is specifically configured to start the neighbor cell measurement according to the terminal device being in a high-speed moving state.

Optionally, the preset information includes the running state of the timer T310 of the terminal device, and the starting unit 401 is specifically configured to start the neighbor cell measurement when the running state of the timer T310 of the terminal device is running.

Optionally, when the preset information includes the count of the counter N310 of the terminal device, the starting unit 401 is specifically configured to start the neighbor cell measurement when the count of the counter N310 is greater than or equal to the third threshold value.

Optionally, when the preset information includes the channel state quantity of the terminal device, the starting unit 401 is specifically configured to start the neighbor cell measurement when the channel state quantity is less than or equal to the fourth threshold value.

Optionally, the terminal device further includes:

The receiving unit 404 is configured to receive a target message sent by a network device corresponding to the serving cell, where the target information includes preset information.

Optionally, the processing unit 402 is specifically configured to initiate the RRC connection re-establishment of the RRC to the target cell according to the measurement result of the neighbor cell measurement after the radio link failure RLF occurs in the terminal device.

In this embodiment, the operations performed by each unit of the terminal device are similar to the steps performed by the terminal device in the foregoing embodiment shown in FIG. 2 , and details are not repeated here.

Please refer to FIG. 5 , which is another schematic structural diagram of a terminal device according to an embodiment of the present application.

A processor 501, a memory 502, a bus 505, and an interface 504. The processor 501 is connected to the memory 502 and the interface 504. The bus 505 is respectively connected to the processor 501, the memory 502, and the interface 504. The interface 504 is used to receive or send data. The processor 501 be a single-core or multi-core central processing unit, or be a specific integrated circuit, or be one or more integrated circuits configured to implement embodiments of the invention. The memory 502 may be a random access memory (random access memory, RAM), or may be a non-volatile memory (non-volatile memory), such as at least one hard disk memory. Memory 502 is used to store computer-executable instructions. Specifically, the program 503 may be included in the computer-executed instructions.

In this embodiment, when the processor 501 calls the program 503, the network device in FIG. 5 can perform the operations performed by the terminal device in the foregoing embodiment shown in FIG. 2, and details are not repeated here.

It should be understood that the processor mentioned in the terminal device in the above embodiments of the present application, or the processor provided by the above embodiments of the present application, may be a central processing unit (central processing unit, CPU), and may also be other general-purpose processors , digital signal processor (DSP), application-specific integrated circuit (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistors Logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the number of processors in the terminal device in the above embodiments of the present application may be one or multiple, and may be adjusted according to actual application scenarios, which is merely illustrative and not limiting. The number of memories in this embodiment of the present application may be one or multiple, and may be adjusted according to actual application scenarios, which is merely illustrative and not limiting.

It should also be noted that when the terminal device includes a processor (or a processing unit) and a memory, the processor in this application may be integrated with the memory, or the processor and the memory may be connected through an interface, which may be based on actual conditions. The application scenario adjustment is not limited.

The present application provides a chip system, the chip system includes a processor for supporting a terminal device to implement the functions of the controller involved in the above method, such as processing data and/or information involved in the above method. In a possible design, the chip system further includes a memory for storing necessary program instructions and data. The chip system may be composed of chips, or may include chips and other discrete devices.

In another possible design, when the chip system is a chip in a user equipment or an access network, the chip includes: a processing unit and a communication unit, the processing unit may be, for example, a processor, and the communication unit, such as It can be an input/output interface, a pin or a circuit, etc. The processing unit can execute the computer-executed instructions stored in the storage unit, so that the chip in the terminal device or the like executes the steps performed by the terminal device in the above-mentioned embodiment shown in FIG. 2 . Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, etc., and the storage unit may also be a storage unit located outside the chip in the terminal device, such as a read-only memory. (read-only memory, ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM), etc.

Embodiments of the present application further provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a computer, implements the method process performed with the controller of the terminal device in any of the above method embodiments. Correspondingly, the computer may be the above-mentioned terminal device.

It should be understood that the controller or processor mentioned in the above embodiments of the present application may be a central processing unit (central processing unit, CPU), or other general-purpose processors, digital signal processors (digital signal processor, DSP) ), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. various combinations. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the number of processors or controllers in the terminal device or chip system, etc. in the above embodiments of the present application may be one or more, and may be adjusted according to actual application scenarios, and this is just an example Description, but not limited. The number of memories in this embodiment of the present application may be one or multiple, and may be adjusted according to actual application scenarios, which is merely illustrative and not limiting.

It should also be understood that, in the embodiments of the present application, the memory or the readable storage medium and the like mentioned in the terminal device and the like in the above embodiments may be volatile memory or non-volatile memory, or may include volatile and non-volatile memory. Volatile memory both. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM), which acts as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (direct rambus RAM, DR RAM).

Those of ordinary skill in the art can understand that all or part of the steps performed by the terminal device or the processor to implement the above embodiments may be completed by instructing the relevant hardware through hardware or programs. The program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a random access memory, or the like. Specifically, for example, the above-mentioned processing unit or processor may be a central processing unit, a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices , transistor logic devices, hardware components, or any combination thereof. Whether the above functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

When implemented in software, the method steps described in the above embodiments may be implemented in whole or in part in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. Computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server, or data center over a wire (e.g. coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) to another website site, computer, server, or data center. A computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media. Useful media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media, among others.

The terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, and this is only a distinguishing manner adopted when describing objects with the same attributes in the embodiments of the present application. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, product or device comprising a series of elements is not necessarily limited to those elements, but may include no explicit or other units inherent to these processes, methods, products, or devices.

The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of this application, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that, in the description of this application, unless otherwise specified, "/" indicates that the associated objects are in an "or" relationship, for example, A/B can indicate A or B; in this application, "and" "/or" is just an association relationship that describes an associated object, which means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone. where A and B can be singular or plural.

Depending on the context, the words "if" or "if" as used herein may be interpreted as "at" or "when" or "in response to determining" or "in response to detecting." Similarly, the phrases "if determined" or "if detected (the stated condition or event)" can be interpreted as "when determined" or "in response to determining" or "when detected (the stated condition or event)," depending on the context )" or "in response to detection (a stated condition or event)".

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: The technical solutions described in the embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims (17)

A communication method, comprising: The terminal device starts neighbor cell measurement according to preset information, and the preset information includes at least one of the following: the movement state of the terminal device, the running state of the timer T310 of the terminal device, the count of the counter N310 of the terminal device, the channel of the terminal device state quantity; The terminal device initiates radio resource control RRC connection re-establishment to the target cell according to the measurement result of the neighbor cell measurement. The method according to claim 1, wherein when the preset information includes the movement state of the terminal device, the terminal device starts neighbor cell measurement according to the preset information, comprising: When the variation of the channel state quantity within the first preset time period is greater than or equal to the first threshold value, the terminal device determines that the terminal device is in a high-speed movement state; The terminal device starts neighbor cell measurement according to the terminal device being in a high-speed moving state. The method according to claim 1, wherein when the preset information includes the movement state of the terminal device, the terminal device starts neighbor cell measurement according to the preset information, comprising: When the number of cells replaced by the terminal equipment within the second preset time period is greater than or equal to the second threshold value, the terminal equipment determines that the terminal equipment is in a high-speed moving state; The terminal device starts neighbor cell measurement according to the terminal device being in a high-speed moving state. The method according to claim 1, wherein the preset information includes a running state of a timer T310 of the terminal device, and the terminal device starting neighbor cell measurement according to the preset information includes: When the running state of the timer T310 of the terminal device is running, the terminal device starts the neighbor cell measurement. The method according to claim 1, wherein when the preset information includes the count of a counter N310 of the terminal device, the terminal device starting the neighbor cell measurement according to the preset information comprises: When the count of the counter N310 of the terminal device is greater than or equal to the third threshold value, the terminal device starts neighbor cell measurement. The method according to claim 1, wherein, when the preset information includes the channel state quantity of the terminal device, the starting of the neighbor cell measurement by the terminal device according to the preset information comprises: When the channel state quantity of the terminal device is less than or equal to the fourth threshold value, the terminal device starts neighbor cell measurement. The method according to any one of claims 1 to 6, wherein before the terminal device starts the neighbor cell measurement according to the preset information, the method further comprises: The terminal device receives a target message sent by a network device corresponding to the serving cell, where the target information includes the preset information. The method according to any one of claims 1 to 7, wherein the terminal device initiating RRC connection re-establishment to the target cell according to the measurement result of the neighbor cell measurement includes: After the radio link failure RLF occurs in the terminal device, the terminal device initiates an RRC connection re-establishment with RRC to the target cell according to the measurement result of the neighbor cell measurement. A terminal device, characterized in that it includes: a starting unit, configured to start neighbor cell measurement according to preset information, the preset information including at least one of the following: the movement state of the terminal device, the running state of the timer T310 of the terminal device, the count of the counter N310 of the terminal device, the channel state quantity; and a processing unit, configured to initiate radio resource control RRC connection re-establishment to the target cell according to the measurement result of the neighbor cell measurement. The terminal device according to claim 9, wherein when the preset information includes the movement state of the terminal device, the terminal device further comprises: a determining unit, configured to determine that the terminal device is in a high-speed moving state when the variation of the channel state quantity within the first preset time period is greater than or equal to the first threshold value; The initiating unit is specifically configured to initiate neighbor cell measurement according to the terminal device being in a high-speed moving state. The terminal device according to claim 9, wherein when the preset information includes the movement state of the terminal device, the terminal device further comprises: a determining unit, configured to determine that the terminal device is in a high-speed moving state when the number of cells to be replaced by the terminal device within the second preset time period is greater than or equal to a second threshold; The initiating unit is specifically configured to initiate neighbor cell measurement according to the terminal device being in a high-speed moving state. The terminal device according to claim 9, wherein the preset information includes the running state of the timer T310 of the terminal device, and the starting unit is specifically configured to be used when the running state of the timer T310 of the terminal device is To start the runtime, start the neighbor measurement. The terminal device according to claim 9, characterized in that, when the preset information includes the count of the counter N310 of the terminal device, the starting unit is specifically configured to, when the count of the counter N310 is greater than or equal to a third threshold value , start neighbor measurement. The terminal device according to claim 9, wherein, when the preset information includes a channel state quantity of the terminal device, the starting unit is specifically configured to, when the channel state quantity is less than or equal to a fourth threshold value , start neighbor measurement. The terminal device according to any one of claims 9 to 14, wherein the terminal device further comprises: A receiving unit, configured to receive a target message sent by a network device corresponding to the serving cell, where the target information includes the preset information. The terminal device according to any one of claims 9 to 15, wherein the processing unit is specifically configured to, after a radio link failure RLF occurs in the terminal device, measure the measurement result according to the neighbor cell measurement Initiate Infinite Resource Control RRC connection re-establishment to the target cell. A readable storage medium storing instructions which, when executed, cause the method of any one of claims 1-8 to be implemented.

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