WO2020164430A1 - Cell reselection method and apparatus - Google Patents

Abstract

The present application provides a cell reselection method and apparatus, comprising: a terminal device receives first information from a first network device, the first information comprising first time information and information of a second network device corresponding to the first time information, or the first information comprising information of a first cell; the first cell is different from a cell currently resident on the terminal device; the terminal device determines, according to the first information, a target cell to be reselected by the terminal device. The terminal device determines, according to the information of the network device corresponding to the first time or the information of the first cell sent by the network device, the target cell to be reselected by the terminal device, thereby avoiding frequent cell measurement of the terminal device and reducing resource overheads caused by frequent cell measurement of the terminal device.

Description

Cell reselection method and device

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on February 14, 2019 with the application number 201910115118.1 and the application titled "Cell reselection method and device", the entire content of which is incorporated into this application by reference.

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office with the application number 201910726703.5 and the application name "Cell reselection method and device" on August 7, 2019, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of communications, and more specifically, to a cell reselection method and device.

Background technique

Because traditional terrestrial networks cannot provide seamless coverage for user equipment (UE), especially in places where base stations cannot be deployed such as the sea, desert, and air. Non-terrestrial networks are introduced into the 5G (5th-generation) system, which provides seamless coverage for UEs by deploying base stations or part of base station functions on high-altitude platforms or satellites, and high-altitude platforms or satellites are less affected by natural disasters and can improve Reliability of 5G system. When the base station is deployed on a low-Earth orbit satellite, because the satellite moves at a high speed, the cell where the base station serves the UE on the ground also moves. In order to ensure the continuity of UE services in the connected state, when the UE moves to the edge of the cell, the UE is triggered to perform cell handover. When the UE is in an idle state, the UE needs to perform cell reselection, and needs to measure the current serving cell, that is, same frequency or different frequency measurement.

In this process, due to changes in cell service quality, the UE will continue to trigger intra-frequency or inter-frequency neighbor cell measurements, which will waste UE resources and power. At the same time, the UE needs to continuously report measurement results and perform cell switching. Cause a lot of signaling overhead. How to reduce the massive resource overhead of the UE during cell reselection or cell handover is a problem to be solved urgently.

Summary of the invention

The present application provides a method and device for cell reselection, which can reduce the resource overhead and power overhead of terminal equipment when performing cell reselection.

In a first aspect, a method for cell reselection is provided, including: a terminal device receives first information from a first network device, the first information includes first time information and a second network corresponding to the first time information The device information or the first information includes the information of the first cell; the first cell is different from the cell where the terminal device currently resides; the terminal device determines that the terminal device is reset according to the first information. The selected target cell.

The terminal device determines the target cell to be reselected by the terminal device according to the information of the network device corresponding to a certain time sent by the network device or the first cell information, thereby avoiding frequent cell measurement by the terminal device and reducing the frequency of the terminal device performing cell measurement. The overhead.

With reference to the first aspect, in some implementations of the first aspect, the first information includes the first time information and information of a second network device corresponding to the first time information.

With reference to the first aspect, in some implementation manners of the first aspect, the first information includes information of the first cell.

With reference to the first aspect, in some implementations of the first aspect, the information of the second network device includes at least one of the following: location information of the second network device, identification of the second network device, and The cell deployment diagram of the second network device, the physical cell identifier PCI or the public land mobile network PLMN of the cell where the second network device is deployed. Optionally, the cell deployment diagram of the second network device may be the geographic location of each cell in the range covered by the second network device relative to the second network device. The cell deployment diagram of the second network device may also be the position of each cell in the projection of the coverage area of the second network device on the ground. The cell deployment diagram of the second network device may also be the transmission angle and transmission power of each cell antenna of the second network device.

With reference to the first aspect, in some implementation manners of the first aspect, the terminal device determining the target cell to be reselected by the terminal device according to the first information includes: the terminal device determining the terminal device Location information; the terminal device determines the target cell to be reselected by the terminal device according to the first information and the location information of the terminal device.

The terminal device determines the next cell in which the terminal device resides according to the information of the second network device corresponding to the first time information sent by the network device to the terminal device and the location information of the terminal device, thus avoiding frequent cell reselection by the terminal device Measurement reduces the signaling overhead.

With reference to the first aspect, in some implementation manners of the first aspect, the terminal device determining the target cell to be reselected by the terminal device according to the first information and the location information of the terminal device includes: The terminal device periodically determines the target cell reselected by the terminal device according to the first information and the location information of the terminal device.

The terminal device periodically determines the next camping cell of the terminal device according to the information of the second network device corresponding to the first time information sent by the network device to the terminal device and the location information of the terminal device, so that the terminal device can be in the best In the serving cell.

With reference to the first aspect, in some implementation manners of the first aspect, the terminal device determining the target cell to be reselected by the terminal device according to the first information and the location information of the terminal device includes: The terminal device determines whether the third cell satisfies a preset condition, the preset condition is determined according to the location information of the terminal device, and the third cell is any cell of the second network device; in the terminal device When the preset condition is satisfied, the terminal device determines the third cell as the target cell.

The terminal device determines the next camping cell of the terminal device according to the preset conditions, so that the best next camping cell of the terminal device can be determined according to the actual situation of the terminal device.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the terminal device determines location information of the terminal device; the terminal device determines the location information of the terminal device according to the first information and the terminal device Determine the first cell set; the terminal equipment measures the cells in the first cell set; the terminal equipment determines the cell set according to the measurement results of the cells in the first cell set The target cell reselected by the terminal device.

The terminal device first determines the first cell set to be measured according to the first information sent by the network device to the terminal device and the location information of the terminal device, and then selects the target cell for reselection according to the measurement result, which can ensure the quality of the target cell for reselection. Avoid reselection due to quality problems of the target cell for reselection, thereby improving reselection efficiency.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the terminal device judging whether the target cell and the cell where the terminal device resides are consistent; In the case that the cells where the terminal equipment resides are not consistent, the terminal equipment is reselected from the cell where it resides to the target cell.

With reference to the first aspect, in some implementations of the first aspect, the information of the first cell includes at least one of the following: the first cell identifier, the first cell frequency point, and the first cell's Cell quality threshold.

With reference to the first aspect, in some implementation manners of the first aspect, the terminal device only measures or preferentially measures the first cell.

According to the cell information designated by the network equipment for the terminal equipment, the terminal equipment only needs to measure the cell information designated by the network equipment, thereby avoiding frequent cell measurements by the terminal equipment, thereby reducing signaling overhead. In the traditional cell reselection measurement mechanism, the terminal device needs to measure the neighboring cell based on the neighboring cell information broadcast by the current serving cell. The network device assigns cell information to the terminal device, and the terminal device preferentially measures the cell information designated by the network device, which can reduce the overhead of the terminal device for neighboring cell measurement, thereby reducing the power consumption of the terminal device. When the terminal device does not meet the conditions for reselecting the target cell after measuring the cell information specified by the network device, the terminal device may remeasure the neighboring cell to ensure the quality of the reselected cell.

With reference to the first aspect, in some implementations of the first aspect, the method includes: the terminal device determines whether the cell quality measurement value of the first cell exceeds the cell quality threshold value of the first cell; The cell quality measurement value of the first cell exceeds the cell quality threshold of the first cell, and the terminal device determines that the first cell is a target cell reselected by the terminal device.

With reference to the first aspect, in some implementation manners of the first aspect, the method further includes: reselecting the terminal device from a camping cell to the target cell.

With reference to the first aspect, in some implementations of the first aspect, the first cell information further includes a first time, and the method further includes: within the first time, if the cell quality of the first cell is measured If the value does not exceed the cell quality threshold of the first cell, the terminal device measures a second cell, and the second cell may be any cell.

The network device sends the next cell information that the terminal device needs to measure to the terminal device according to the location of each cell of the network device and the terminal device, thereby avoiding the terminal device from performing a large number of cell reselection measurements and reducing signaling overhead.

With reference to the first aspect, in some implementations of the first aspect, the first information further includes a cell list, and the cell list includes the cell in which the terminal device is currently located and the target cell to be reselected, and The time domain location information of the paging configuration of each cell in the cell list is the same, the terminal device only receives the main information block in the system information from the second network device, and the main information block contains the frequency domain location information of the paging configuration .

Optionally, the paging configuration time domain location information of each cell in the cell list may also be derived based on the paging configuration time domain location information of the current cell.

Optionally, the paging configuration time domain location information of each cell in the cell list may also be derived based on the PCI of the current cell.

In order to prevent the terminal equipment from frequently reading cell broadcast information after reselecting the cell. The network device sends the cell with the same paging configuration to the terminal device. After the terminal device performs the cell reselection, the terminal device in the idle or inactive state does not need to read the cell broadcast message, thereby reducing frequent reading by the terminal device. Take the overhead of cell broadcast information.

In a second aspect, a cell reselection method is provided, including: a second network device generates first information, the first information includes first time information and information of a second network device corresponding to the first time information Or the first information includes the information of the first cell; the first cell is different from the cell where the terminal device currently resides; the second network device sends the first information to the terminal device so that the terminal device According to the first information, a target cell to be reselected by the terminal device is determined.

The network device sends the information of the network device corresponding to a certain time or the first cell information to the terminal device, thereby avoiding frequent cell measurement by the terminal device, and reducing the overhead caused by frequent cell measurement by the terminal device.

With reference to the second aspect, in some implementation manners of the second aspect, the first information includes the first time information and information of a second network device corresponding to the first time information.

With reference to the second aspect, in some implementation manners of the second aspect, the first information includes information of the first cell.

With reference to the second aspect, in some implementations of the second aspect, the information of the second network device includes at least one of the following: location information of the second network device, identification of the second network device, and The cell deployment diagram of the second network device, the physical cell identifier PCI or the public land mobile network PLMN of the cell where the second network device is deployed. Optionally, the cell deployment diagram of the second network device may be the geographic location of each cell in the range covered by the second network device relative to the second network device. The cell deployment diagram of the second network device may also be the position of each cell in the projection of the coverage area of the second network device on the ground. The cell deployment diagram of the second network device may also be the transmission angle and transmission power of each cell antenna of the second network device.

With reference to the second aspect, in some implementations of the second aspect, the information of the second network device is used to instruct the terminal device to determine the location information of the terminal device; the information of the second network device is also used Instructing the terminal device to determine a target cell for reselection by the terminal device according to the information of the second network device and the location information of the terminal device.

With reference to the second aspect, in some implementation manners of the second aspect, the information of the second network device is further used to instruct the terminal device according to the information of the second network device and the location information of the terminal device, Periodically determine the target cell reselected by the terminal device.

With reference to the second aspect, in some implementations of the second aspect, the information of the second network device is also used to instruct the terminal device to determine whether the third cell satisfies a preset condition, and the preset condition is based on Determined by the location information of the terminal device, the third cell is any cell of the second network device; when the third cell of the terminal device satisfies the preset condition, the terminal The device determines the third cell as the target cell.

With reference to the second aspect, in some implementations of the second aspect, the information of the second network device is also used to instruct the terminal device to determine whether the target cell and the cell where the terminal device resides are consistent; In the case where the target cell and the cell where the terminal device resides are not consistent, the terminal device is reselected from the cell where it resides to the target cell.

With reference to the second aspect, in some implementations of the second aspect, the information of the first cell includes at least one of the following: the first cell identifier, the first cell frequency, and the first cell's Cell quality threshold.

With reference to the second aspect, in some implementation manners of the second aspect, the first cell is a cell that the terminal device measures only or preferentially measures.

With reference to the second aspect, in some implementations of the second aspect, the first cell information is used to instruct the terminal device to determine whether the cell quality measurement value of the first cell exceeds the cell quality of the first cell Threshold; if the cell quality measurement value of the first cell exceeds the cell quality threshold of the first cell, the first cell information is also used to instruct the terminal device to determine that the first cell is the The target cell reselected by the terminal device.

With reference to the second aspect, in some implementation manners of the second aspect, the first cell information is further used to instruct the terminal device to reselect a camping cell to the target cell.

With reference to the second aspect, in some implementations of the second aspect, the first cell information further includes a first time, and the first cell information is also used to indicate that within the first time, if the cell of the first cell The quality measurement value does not exceed the cell quality threshold of the first cell, and the terminal device measures a second cell, and the second cell may be any cell.

The network equipment assigns the first cell information to the terminal equipment. Accordingly, the terminal equipment only needs to measure or preferentially measure the first cell information designated by the network equipment, thereby avoiding frequent cell measurement by the terminal equipment, thereby reducing signaling overhead.

With reference to the second aspect, in some implementation manners of the second aspect, the first information further includes a cell list, and the cell list includes the cell where the terminal device is currently located and the reselected target cell, and The time domain location information of the paging configuration of each cell in the cell list is the same, the terminal device only receives the main information block in the system information from the second network device, and the main information block contains the frequency domain location information of the paging configuration .

Optionally, the paging configuration time domain location information of each cell in the cell list may also be derived based on the paging configuration time domain location information of the current cell.

Optionally, the paging configuration time domain location information of each cell in the cell list may also be derived based on the PCI of the current cell.

The network device sends the cell with the same paging configuration to the terminal device. After the terminal device performs the cell reselection, the terminal device in the idle or inactive state does not need to read the cell broadcast message, thereby reducing frequent reading by the terminal device. Take the overhead of cell broadcast information.

In a third aspect, a cell handover method is provided, including: the terminal device receives handover configuration information sent by the first network device, the handover configuration information including: random access resources and a first trigger condition.

With reference to the third aspect, in some implementations of the third aspect, the first trigger condition includes a first distance trigger condition or a first time trigger condition, and the first distance trigger condition is: the terminal device and the first The distance of a location is less than the second threshold; the first time trigger condition is: within the second time, the terminal device detects the target cell, or the first time trigger condition may also be: When the second time arrives, the terminal device initiates a handover request to the target cell.

Wherein, the first position may be a preset position. For example, the first location may be the edge of the target cell of the terminal device or the center of the target cell of the terminal device.

With reference to the third aspect, in some implementations of the third aspect, the handover configuration information may further include at least one of the following: the identity of the third network device, the PCI of the cell where the third network device is deployed, and the The cell deployment diagram of the third network device or the location information of the third network device.

With reference to the third aspect, in some implementations of the third aspect, the method further includes: the terminal device determines whether the terminal device satisfies the first trigger condition according to the handover configuration information and the location information of the terminal device ; In the case that the terminal device meets the first trigger condition, the terminal device initiates random access to the third network device to switch to the third network device.

With reference to the third aspect, in some implementation manners of the third aspect, the method further includes: the terminal device receives the location request information and the second trigger condition sent by the first network device; The first network device sends the location information of the terminal device; the first network device determines whether the terminal device performs cell handover according to the location information of the terminal device.

With reference to the third aspect, in some implementations of the third aspect, the second trigger condition includes a second distance trigger condition or a second time trigger condition, and the second distance trigger condition is: the terminal device moves The distance exceeds the second threshold; the second time trigger condition is: the first period value.

With reference to the third aspect, in some implementation manners of the third aspect, the terminal device sending the location information of the terminal device to the first network device includes: when the terminal device satisfies the second trigger condition In this case, the terminal device sends the location information of the terminal device to the first network device.

The terminal device determines whether the terminal device performs cell handover according to the location information of the terminal device and the first trigger condition, so that the terminal device does not need to frequently report the cell measurement report to the network device, thereby reducing signaling overhead.

In a fourth aspect, a communication device is provided, including: a transceiving unit and a processing unit, the transceiving unit is configured to receive first information from a first network device, the first information including first time information and The information of the second network device corresponding to the first time information or the first information includes the information of the first cell; the first cell is different from the cell where the terminal device currently resides; the processing unit is configured to The first information determines the target cell to be reselected by the communication device.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first information includes the first time information and information of a second network device corresponding to the first time information.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first information includes information of the first cell.

With reference to the fourth aspect, in some implementations of the fourth aspect, the information of the second network device includes at least one of the following: location information of the second network device, identification of the second network device, and The cell deployment diagram of the second network device, the physical cell identifier PCI or the public land mobile network PLMN of the cell where the second network device is deployed.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the processing unit is configured to determine the target cell to be reselected by the communication device according to the first information, including: the processing unit further specifically uses In: determine the location information of the communication device; the processing unit is further specifically configured to: determine the target cell reselected by the communication device according to the first information and the location information of the communication device.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the processing unit determining the target cell for reselection according to the first information includes: the processing unit is further specifically configured to: determine the communication device的 location information; according to the first information and the location information of the terminal equipment, determine a first cell set, measure the cells in the first cell set, and measure the cells in the first cell set according to The measurement result of the measurement determines the target cell reselected by the terminal device;

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the processing unit is further specifically configured to: periodically determine that the communication device reselects according to the first information and the location information of the communication device The target cell.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the processing unit is further specifically configured to: determine a target cell to be reselected by the communication device according to the first information and the location information of the communication device , Including: the processing unit is further specifically configured to determine whether a third cell satisfies a preset condition, the preset condition is determined according to the location information of the communication device, and the third cell is the second network device Any cell of; in the case that the communication device meets the preset condition, the processing unit is further specifically configured to determine the third cell as the target cell.

With reference to the fourth aspect, in some implementations of the fourth aspect, the processing unit is further configured to determine whether the target cell and the cell where the communication device resides are the same; when the target cell and the terminal device are camped on. In the case that the staying cells are inconsistent, the processing unit is further specifically configured to reselect the communication device from the camping cell to the target cell.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the information of the first cell includes at least one of the following: the first cell identifier, the frequency point of the first cell, and the information of the first cell Cell quality threshold.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the processing unit only measures or preferentially measures the first cell.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the processing unit determining the target cell to be reselected by the terminal device according to the first information includes: the processing unit is further specifically configured to: determine Whether the cell quality measurement value of the first cell exceeds the cell quality threshold value of the first cell; if the cell quality measurement value of the first cell exceeds the cell quality threshold value of the first cell, the The processing unit is further specifically configured to determine that the first cell is a target cell reselected by the communication device.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the processing unit is further configured to reselect the camping cell to the target cell.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first cell information further includes a first time, and the processing unit is further configured to: within the first time, if the cell of the first cell The quality measurement value does not exceed the cell quality threshold of the first cell, and the processing unit is further specifically configured to measure a second cell, and the second cell may be any cell.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first information further includes a cell list, and the cell list includes the cell where the communication device is currently located and the reselected target cell, and The time domain location information of the paging configuration of each cell in the cell list is the same, and the communication device receives only the main information block in the system information from the second network device, and the main information block contains the frequency domain location information of the paging configuration .

Optionally, the paging configuration time domain location information of each cell in the cell list may also be derived based on the paging configuration time domain location information of the current cell.

Optionally, the paging configuration time domain location information of each cell in the cell list may also be derived based on the PCI of the current cell.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is further configured to receive handover configuration information sent by the first network device, where the handover configuration information includes: random access resources, first Trigger condition, target cell identity.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first trigger condition includes a first distance trigger condition or a first time trigger condition, and the first distance trigger condition is: the communication device and the second The distance of a location is less than the second threshold; the first time trigger condition is: within the second time, the processing unit detects the target cell, or the first time trigger condition may also be: When the second time arrives, the processing unit is used to initiate a handover request to the target cell.

Wherein, the first position may be a preset position. For example, the first location may be the edge of the target cell of the terminal device or the center of the target cell of the terminal device.

With reference to the fourth aspect, in some implementations of the fourth aspect, the handover configuration information may further include at least one of the following: the identity of the third network device, the PCI of the cell where the third network device is deployed, and the The cell deployment diagram of the third network device or the location information of the third network device.

With reference to the fourth aspect, in some implementations of the fourth aspect, the processing unit is further configured to determine whether the communication device satisfies the first trigger condition according to the handover configuration information and the location information of the terminal device; When the communication device meets the first trigger condition, the sending unit is further configured to initiate random access to the third network device to switch to the third network device.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiving unit is further configured to receive location request information and a second trigger condition sent by the first network device; the transceiving unit is further configured to send The first network device sends the location information of the communication device.

With reference to the fourth aspect, in some implementations of the fourth aspect, the second trigger condition includes a second distance trigger condition or a second time trigger condition, and the second distance trigger condition is: the terminal device moves The distance exceeds the second threshold; the second time trigger condition is: the first period value.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiving unit is further configured to send the location information of the terminal device to the first network device includes: the communication device satisfies the second In the case of a trigger condition, the transceiver unit is further configured to send the location information of the communication device to the first network device.

In a fifth aspect, a communication device is provided, including: a transceiver unit and a processing unit, the processing unit is configured to generate first information, the first information including first time information and corresponding to the first time information The information of the second network device or the first information includes the information of the first cell; the first cell is different from the cell where the terminal device currently resides; the transceiver unit: used to send the first cell to the terminal device Information, so that the terminal device determines the target cell to be reselected by the terminal device according to the first information.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the first information includes the first time information and information of a second network device corresponding to the first time information.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the first information includes information of the first cell.

With reference to the fifth aspect, in some implementations of the fifth aspect, the information of the second network device includes at least one of the following: location information of the second network device, identification of the second network device, and The cell deployment diagram of the second network device, the physical cell identifier PCI or the public land mobile network PLMN of the cell where the second network device is deployed.

With reference to the fifth aspect, in some implementations of the fifth aspect, the information of the second network device is used to instruct the terminal device to determine the location information of the terminal device; the information of the second network device shown is also used Instructing the terminal device to determine a target cell for reselection by the terminal device according to the information of the second network device and the location information of the terminal device.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the processing unit is further specifically configured to: periodically determine that the communication device reselects according to the first information and the location information of the communication device The target cell.

With reference to the fifth aspect, in some implementations of the fifth aspect, the processing unit is further configured to determine whether the third cell satisfies a preset condition, and the preset condition is determined according to the location information of the communication device, The third cell is any cell of the second network device; in the case that the third cell of the communication device satisfies the preset condition, the processing unit is further configured to determine the third cell For the target cell.

With reference to the fifth aspect, in some implementations of the fifth aspect, the processing unit is further configured to determine whether the target cell and the camping cell of the communication device are consistent; in the target cell and the communication device In the case where the camping cells of are inconsistent, the processing unit is further configured to reselect the camping cell to the target cell.

With reference to the fifth aspect, in some implementations of the fifth aspect, the information of the first cell includes at least one of the following: the first cell identifier, the first cell frequency, and the first cell's Cell quality threshold.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the first cell is a cell that the terminal device only measures.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first cell information is used to instruct the terminal device to determine whether the cell quality measurement value of the first cell exceeds the cell quality of the first cell Threshold; if the cell quality measurement value of the first cell exceeds the cell quality threshold of the first cell, the first cell information is also used to instruct the terminal device to determine that the first cell is the The target cell reselected by the terminal device.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the processing unit is further configured to instruct reselection from the camping cell to the target cell.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first cell information further includes a first time, and the first cell information is also used to indicate that within the first time, if the cell of the first cell is The quality measurement value does not exceed the cell quality threshold of the first cell, and the terminal device measures a second cell, and the second cell may be any cell.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the first information further includes a cell list, and the cell list includes the cell where the terminal device is currently located and the reselected target cell, and The time domain location information of the paging configuration of each cell in the cell list is the same, the terminal device only receives the main information block in the system information from the second network device, and the main information block contains the frequency domain location information of the paging configuration .

Optionally, the paging configuration time domain location information of each cell in the cell list may also be derived based on the paging configuration time domain location information of the current cell.

Optionally, the paging configuration time domain location information of each cell in the cell list may also be derived based on the PCI of the current cell.

With reference to the fifth aspect, in some implementations of the fifth aspect, the transceiver unit is further configured to send handover configuration information to the terminal device, where the handover configuration information includes: random access resources and a first trigger condition.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first trigger condition includes a first distance trigger condition or a first time trigger condition, and the first distance trigger condition is: the terminal device and the first The distance of a location is less than the second threshold; the first time trigger condition is: within the second time, the terminal device detects the target cell, or the first time trigger condition may also be: When the second time arrives, the terminal device initiates a handover request to the target cell.

Wherein, the first position may be a preset position. For example, the first location may be the edge of the target cell of the terminal device or the center of the target cell of the terminal device.

With reference to the fifth aspect, in some implementations of the fifth aspect, the handover configuration information may further include at least one of the following: the identity of the third network device, the PCI of the cell where the third network device is deployed, and The cell deployment diagram of the third network device or the location information of the third network device.

With reference to the fifth aspect, in some implementations of the fifth aspect, the transceiving unit is further configured to send the location request information and the second trigger condition to the terminal device; the transceiving unit is further configured to receive information sent by the terminal device Location information; the processing unit is also used to determine whether the terminal device performs cell handover according to the location information of the communication device.

With reference to the fifth aspect, in some implementations of the fifth aspect, the second trigger condition includes a second distance trigger condition or a second time trigger condition, and the second distance trigger condition is: the terminal device moves The distance exceeds the second threshold; the second time trigger condition is: the first period value.

With reference to the fifth aspect, in some implementations of the fifth aspect, the transceiving unit being further configured to receive the location information sent by the terminal device includes: when the terminal device satisfies the second trigger condition, The transceiver unit is also used to receive location information sent by the terminal device.

With reference to the fifth aspect, in some implementations of the fifth aspect, the transceiving unit is further configured to send handover request information to the third network device; the transceiving unit is further configured to receive handover sent by the third network device Response information.

In a sixth aspect, a communication device is provided, including a processor. The processor is coupled with the memory and can be used to execute instructions in the memory to implement the method in any one of the foregoing first aspect, third aspect, or any one of the first aspect and third aspect. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface.

In an implementation manner, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver or an input/output interface.

In another implementation manner, the communication device is a chip configured in a terminal device. When the communication device is a chip configured in a terminal device, the communication interface may be an input/output interface.

In a seventh aspect, a communication device is provided, including a processor. The processor is coupled with the memory and can be used to execute instructions in the memory to implement the foregoing second aspect or the method in any one of the possible implementation manners of the second aspect. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface.

In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation manner, the communication device is a chip configured in a network device. When the communication device is a chip configured in a network device, the communication interface may be an input/output interface.

Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

In an eighth aspect, a processor is provided, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes any possible implementation manner of the first aspect to the third aspect and the first aspect to the third aspect Method in.

In a specific implementation process, the foregoing processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by the transmitter, and the input circuit and output The circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.

In a ninth aspect, a processing device is provided, including a processor and a memory. The processor is used to read instructions stored in the memory, receive signals through a receiver, and transmit signals through a transmitter to execute any one of the first to third aspects and any one of the first to third aspects. Methods.

Optionally, there are one or more processors, and one or more memories.

Optionally, the memory may be integrated with the processor, or the memory and the processor may be provided separately.

In the specific implementation process, the memory can be a non-transitory (non-transitory) memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be set in different On the chip, the embodiment of the present application does not limit the type of memory and the setting mode of the memory and the processor.

It should be understood that the related data interaction process, for example, sending instruction information may be a process of outputting instruction information from the processor, and receiving capability information may be a process of the processor receiving input capability information. Specifically, the processed output data can be output to the transmitter, and the input data received by the processor can come from the receiver. Among them, the transmitter and receiver can be collectively referred to as a transceiver.

The processing device in the aforementioned ninth aspect may be a chip. The processor may be realized by hardware or software. When realized by hardware, the processor may be a logic circuit, integrated circuit, etc.; when realized by software, the processor may be a general-purpose processor. This is achieved by reading the software code stored in the memory, the memory may be integrated in the processor, may be located outside the processor, and exist independently.

In a tenth aspect, a computer program product is provided. The computer program product includes: a computer program (also called code, or instruction), which when the computer program is executed, causes the computer to execute the first aspect to the first aspect. The method in any one of the three aspects and the first to third aspects.

In an eleventh aspect, a computer-readable medium is provided, and the computer-readable medium stores a computer program (also called code, or instruction) when it runs on a computer, so that the computer executes the above-mentioned first aspect to The third aspect and the method in any one of the possible implementation manners of the first to third aspects.

In a twelfth aspect, a communication system is provided, including the aforementioned network equipment and terminal equipment.

Description of the drawings

Fig. 1 is a schematic diagram of a communication system suitable for the method provided in the embodiment of the present application.

Figure 2 shows a flow chart of cell handover.

Fig. 3 shows a schematic flowchart of a cell reselection method provided by an embodiment of the present application.

Fig. 4 shows a schematic flowchart of a cell handover method provided by an embodiment of the present application.

Fig. 5 shows a schematic structural diagram of a communication device provided by an embodiment of the present application.

detailed description

The technical solution in this application will be described below in conjunction with the drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, and broadband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE Time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, the future fifth generation (5th generation, 5G) system or new radio (NR), etc.

To facilitate the understanding of the embodiments of the present application, first, a communication system suitable for the method provided in the embodiments of the present application will be described in detail with reference to FIG. 1. FIG. 1 shows a schematic diagram of a communication system 100 applicable to the method provided in the embodiment of the present application. As shown in the figure, the communication system 100 may include at least one network device, such as a base station (gNB) and a satellite station in the 5G system as shown in FIG. 1; the communication system 100 may also include at least one terminal device, as shown in FIG. User equipment (user equipment, UE) 1 to UE 9 shown in FIG. The network device and each terminal device can communicate via wireless links. For example, the network device may send configuration information to the terminal device, and the terminal device may send uplink data to the network device based on the configuration information; for another example, the network device may send downlink data to the terminal device. Therefore, the gNB and UE 1 to UE 6 in Fig. 1 can form a communication system; the satellite station and UE 7 to UE 9 in Fig. 1 can also form a communication system. In addition, the base station and the satellite station are connected to the core network equipment in different ways, and the base station and the satellite station and the core network equipment can send mutual data. In this architecture, there can be multiple satellite stations or multiple base stations, and the satellite stations can also serve UEs like UE 1 to UE 6. This application does not limit this.

The terminal devices in the communication system 100, such as UE 4 to UE 6, may also constitute a communication system. For example, UE 5 can control UE 4 and UE 6 to execute corresponding instructions. This application does not limit this.

It should be understood that the network device in the communication system may be any device with a wireless transceiver function. The network equipment includes but is not limited to: evolved Node B (eNB), radio network controller (RNC), node B (Node B, NB), base station controller (BSC) ), base transceiver station (BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (BBU), wireless fidelity (wireless fidelity, WiFi) systems The access point (AP), wireless relay node, wireless backhaul node, transmission point (TP) or transmission and reception point (TRP), etc., can also be 5G, for example, NR, gNB in the system, or transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of the base station in the 5G system, or it can also be a network node that constitutes a gNB or transmission point , Such as baseband unit (BBU), or distributed unit (DU), etc.

In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include a radio unit (RU). CU implements some functions of gNB, DU implements some functions of gNB, for example, CU implements radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP) layer functions, DU implements wireless link The functions of radio link control (RLC), media access control (MAC) and physical (PHY) layers. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by DU , Or, sent by DU+CU. It can be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into network equipment in an access network (radio access network, RAN), and the CU can also be divided into network equipment in a core network (core network, CN), which is not limited in this application.

The terminal equipment in the embodiments of this application may refer to user equipment, access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device. The terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), with wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or future evolution of the public land mobile network (PLMN) Terminal equipment, etc., this embodiment of the present application does not limit this.

As an example and not a limitation, in the embodiment of the present invention, the terminal device may also be a wearable device. Wearable devices can also be referred to as wearable smart devices. It is a general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones. Use, such as various smart bracelets and smart jewelry for physical sign monitoring.

In addition, in the embodiments of the present invention, the terminal device may also be a terminal device in the Internet of Things (IoT) system. IoT is an important part of the development of information technology in the future. Its main technical feature is to pass items through communication technology. Connect with the network to realize the intelligent network of human-machine interconnection and interconnection of things.

In the embodiment of the present invention, the IOT technology can achieve massive connections, deep coverage, and power-saving terminals through, for example, narrowband NB technology. For example, the NB only includes one resource block (resource bloc, RB), that is, the bandwidth of the NB is only 180 KB. To achieve mass access, terminals must be discrete in access. The communication method according to the embodiment of the present invention can effectively solve the congestion problem of massive IOT technology terminals when accessing the network through NB.

The network device in the embodiment of the application may be a device used to communicate with terminal devices. The network device may be a global system for mobile communications (GSM) system or code division multiple access (CDMA) The base transceiver station (BTS) in the LTE system can also be the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolved base station (evolved) in the LTE system. NodeB, eNB or eNodeB), it can also be a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, access point, vehicle-mounted device, wearable device, and future The network equipment in the 5G network or the network equipment in the PLMN network that will evolve in the future can be the access point (AP) in the WLAN, or the gNB in the new radio system (NR) system. This application The embodiment is not limited.

In addition, in the embodiment of the present invention, the access network equipment provides services for the cell, and the terminal equipment communicates with the access network equipment through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell. It can be a cell corresponding to an access network device (such as a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cell here can include: metro cell, micro cell ( Micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.

In addition, the carrier in the LTE system or the 5G system can have multiple cells working at the same frequency at the same time. In some special scenarios, the concept of the above-mentioned carrier and the cell can also be considered equivalent. For example, in a carrier aggregation (CA) scenario, when a secondary carrier is configured for a UE, the carrier index of the secondary carrier and the cell identification (Cell ID) of the secondary cell working on the secondary carrier will be carried at the same time. In this case, the concept of carrier and cell can be considered to be equivalent. For example, the UE accessing a carrier is equivalent to accessing a cell.

The core network device can be connected to multiple access network devices to control the access network device, and can distribute data received from the network side (for example, the Internet) to the access network device.

Among them, the functions and specific implementations of the terminal devices, access network devices, and core network devices listed above are only exemplary descriptions, and the present invention is not limited thereto.

In the embodiments of the present application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory). The operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. In addition, the embodiments of the application do not specifically limit the specific structure of the execution subject of the methods provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided according to the embodiments of the application. For example, the execution subject of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute the program.

It should also be understood that FIG. 1 is only a simplified schematic diagram of an example for ease of understanding, and the communication system 100 may also include other network devices or other terminal devices, which are not shown in FIG. 1.

To facilitate the understanding of the embodiments of the present application, first, a brief description of several concepts involved in the following is given.

1. Non-terrestrial networks (NTN): NTN is introduced into 5G systems. It provides seamless coverage for UEs by deploying base stations or part of base station functions on high-altitude platforms or satellites, and high-altitude platforms or satellites are subject to natural disasters The impact is small and can improve the reliability of the 5G system. When the base station is deployed on a low-Earth orbit satellite, because the satellite moves at a high speed, the cell where the base station serves the UE on the ground also moves. For example, for a low-Earth satellite with a height of 1000km, the cell radius on the ground is 200km. The time from entering this cell to leaving this cell is about 1 minute. Although the satellite moves at a high speed, the trajectory of the satellite is relatively fixed, and can be represented by the star trail map, that is to say, the absolute position of the satellite at a certain moment can be known through the star trail map.

2. Public land mobile network (PLMN): A network established and operated by the government or an operator approved by it to provide the public with land mobile communication services. The PLMN is generally interconnected with the public switched telephone network (PSTN) to form an entire regional or country-scale communication network. PLMN is a wireless communication system that tends to face land-based mobile users, such as vehicles or walking.

3. Random access channel (RACH). RACH means that the mobile station uses this channel to send information to the base station when it randomly accesses the network. The information sent includes: the response to the paging message of the base station; the access of the mobile station when it first calls. And the mobile station also applies to the base station for assignment of an independent dedicated control channel on this channel, which is an uplink channel.

4. Master Indication Block (MIB): It is the master information message in a wideband code division multiple access (WCDMA) network. The main information block includes the PLMN identifier and the scheduling information of the scheduling block (schedule block, SB) or the system information block (system info block, SIB). Used to broadcast the current cell information status to terminal equipment.

5. Cell handover: In a cellular network, in order to ensure the continuity of UE services in a connected state, the network will trigger the UE handover when the UE moves to the edge of the cell. Figure 2 shows the flow chart of cell handover. In general, the handover process includes four steps:

(1) The original base station sends measurement configuration information to the UE, that is, which handover required parameters the UE needs to measure;

(2) The UE performs measurement and reports a measurement report to the original base station to meet the handover requirements;

(3) The original base station makes a handover decision based on the measurement report and algorithm strategy;

(4) The original base station sends handover request information to the target base station, and the target base station determines whether it can serve the terminal device according to its own situation, and sends handover response information to the original base station;

(5) The original base station performs handover execution according to the handover response information sent by the target base station;

(6). When the terminal device performs handover, it will randomly access the target base station.

6. Cell reselection: refers to the process in which the UE selects the best cell to provide service signals by monitoring the signal quality of the neighboring cell and the current cell in the idle mode. After the UE successfully camps, it will continue to measure the current serving cell. The UE compares the reference signal receiving power (RSRP) of the current serving cell with threshold 1 (same frequency measurement start threshold) and threshold 2 (different frequency/different system measurement start threshold) as whether to start neighboring cells The judgment condition of the measurement. If the RSRP of the current cell is less than the threshold 1, the same frequency measurement is performed; if there are adjacent cells with low priority or the same priority frequency, and the RSRP of the current cell is less than the threshold 2, then the inter-frequency measurement is performed. That is, cell reselection is to determine whether to perform neighbor cell measurement according to the service quality of the current cell.

Due to the high-speed movement of satellites, even if the UE does not move, the cell where the UE resides will always change. In this process, due to changes in the service quality of the cell where the UE resides, the UE will continuously trigger intra-frequency/different-frequency neighbor cell measurements, which will waste the UE's resources and power. At the same time, the UE needs to continuously report measurement results and perform cell handover, which causes a lot of signaling overhead.

Therefore, there is an urgent need to provide a method that can reduce signaling overhead. The following describes the embodiments of the present application in detail with reference to FIG. 3.

In order to facilitate the understanding of the embodiments of the present application, before introducing the embodiments of the present application, the following descriptions are made.

First, in the embodiment of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain piece of information (the first indication information described below) is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, for example, but not limited to, direct indication Information to be instructed, such as the information to be instructed itself or the index of the information to be instructed, etc. The information to be indicated can also be indicated indirectly by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, and other parts of the information to be indicated are known or agreed in advance. For example, it is also possible to realize the indication of specific information by means of the pre-arranged order (for example, stipulated in the agreement) of various information, thereby reducing the indication overhead to a certain extent.

Second, in the embodiments shown below, the first, second, and various numerical numbers are only for easy distinction for description, and are not used to limit the scope of the embodiments of the present application. For example, distinguish between different instructions.

Third, the “multiple” mentioned in the embodiments of the present application refers to two or more. "The following one (a) or multiple (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a). For example, at least one or more of a, b, and c can represent: a, or b, or c, or a and b, or a and c, or b and c, or a , B and c, where a, b, c can be single or multiple.

The method provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 3 shows a schematic flowchart of a cell reselection method provided by an embodiment of the present application. The method may include step S301 to step S302. The cell reselection method shown in FIG. 3 may include 4 embodiments, which will be described in detail below.

Example 1

In step S301, the terminal device receives the first information.

Optionally, the first information may be received by the terminal device and sent by the first network device.

Optionally, the first network device may be a base station or a satellite station.

Optionally, the terminal device may obtain the first information through the cell broadcast information of the first network device.

Optionally, the first information may also be sent by the first network device to the terminal device through dedicated signaling. For example, when the terminal device performs network registration with the first network device, when the first network device makes an attachment response reply, the first network device sends the first information to the terminal device through dedicated signaling.

Optionally, the first information may include the first time information and the information of the second network device corresponding to the first time.

Optionally, the first information may include ephemeris information of the second network device.

Optionally, the first information may be information of each cell in the second network device at a certain time.

Optionally, the first information may also be movement track information of the second network device within a certain period of time.

Optionally, the second network device may be the same as or different from the first network device. This application does not limit this.

Optionally, the first information may also include information of multiple network devices, and this application is not limited to the information of the second network device.

For example, the first information may also include the information of the Ath network device corresponding to the first time, and the first information may also include the information of the Bth network device corresponding to the first time. This application provides information about how many networks the first information includes The information of the device is not limited.

Optionally, the information of the second network device may include location information of the second network device.

For example, the location information of the second network device may be the geographic location of the second network device relative to the terminal device, or it may be the absolute geographic location information of the second network device. For example, the absolute geographic location of the second network device may be the coordinates of the second network device directly obtained through the coordinate system. For another example, the absolute geographic location of the second network device may also be obtained through other parameters. Exemplarily, when the second network device is a satellite station, the other parameters may be star trail information, star orbit information, satellite orbit number, angle and/or altitude, etc. The star trail information can be used to indicate the trajectory of the second network device's movement; the star trail information can be used to indicate the trajectory of the second network device's movement. The trajectory of the movement of the second network device or the trajectory of the movement of the second network device may be the relationship between time and the position of the second network device, passing through the time when the second network device is running and the trajectory or trajectory of the second network device. You can get the location of the second network device.

Optionally, the information of the second network device may further include the identification of the second network device.

For example, the identifier of the second network device may be network device A. For another example, the identifier of the second network device may also be network device B. This application does not limit the specific form of the identification of the second network device.

Optionally, the information of the second network device may also include an index of the second network device.

For example, the index of the second network device may be index 1, and the index of the second network device may also be index 2. This application does not limit the specific form of the index of the second network device. Optionally, the information of the second network device may include a physical cell identifier (physical cell identifier, PCI) of a cell where the second network device is deployed. The terminal device can know which network device is communicating with the terminal device through the PCI of the second network device.

Optionally, the PCI of the cell where the second network device is deployed may also be an index of the cell where the second network device is deployed. This application does not limit this.

Optionally, the second network device may be a network device that communicates with the terminal device. For example, the second network device may be the satellite station shown in FIG. 1, and the terminal device may be UE 7, UE 8. Any terminal device in UE9. The second network device may also be a network device that does not communicate with the terminal device. For example, the second network device may also be the base station shown in FIG. 1, and the terminal device may be UE 7, UE 8, UE 9. Any terminal device in the This application does not limit this.

Optionally, the information of the second network device may also include a cell deployment map of the second network device.

Exemplarily, the cell deployment diagram of the second network device may be the geographic location of each cell in the range covered by the second network device relative to the second network device. The cell deployment diagram of the second network device may also be the position of each cell in the projection of the coverage area of the second network device on the ground. The cell deployment diagram of the second network device may also be the transmission angle and transmission power of each cell antenna of the second network device.

For example, there are cell 1, cell 2, and cell 3 in the coverage area of the second network device, and the cell deployment diagram of the second network device may be the geographic position relationship diagram of cell 1, cell 2, and cell 3 relative to the second network device. It is a spatial geographic location correlation map, or it may be a geographic location relationship map projected on the ground by the coverage of the second network device. This application does not limit this, and at the same time, this application does not limit the number of cells within the coverage of the second network device.

Optionally, the information of the second network device may also include a public land mobile network (PLMN).

In step S302, a target cell for reselection of the terminal device is determined.

Optionally, the terminal device determines the location information of the terminal device, that is, the terminal device determines its own location information.

Optionally, the location information of the terminal device may be location information of the terminal device relative to the second network device.

Optionally, the location information of the terminal device may also be location information of the terminal device relative to each cell in the second network device.

Optionally, the location information of the terminal device may also be the absolute geographic location information of the terminal device.

Optionally, the terminal device determines the target cell for reselection of the terminal device according to its own location information. Specifically, the terminal device determines whether the third cell satisfies a preset condition, and when the third cell satisfies the preset condition, the terminal device determines that the third cell is the target cell.

Optionally, the third cell may be any cell of the second network device.

Optionally, the preset condition may be whether the distance between the edge of the third cell and the terminal device is less than a first threshold.

Optionally, the first threshold may be preset, and the first threshold is a distance threshold.

Optionally, in a case where the distance between the edge of the third cell and the terminal device is less than the first threshold, the terminal device determines that the third cell is the target cell.

Optionally, the terminal device may also determine whether the third cell is a high frequency priority cell. In the case that the third cell is a high frequency priority cell, the terminal device determines that the third cell is a target cell.

Optionally, after the terminal device has determined the target cell, the terminal device needs to determine whether the target cell is consistent with the cell where the terminal device currently resides.

Optionally, in the case where the target cell and the cell where the terminal device currently resides are inconsistent, the terminal device reselects from the cell where it currently resides to the target cell.

The terminal device determines the next cell where the terminal device resides according to its own location information and the information of the second network device, thereby avoiding frequent measurement of the reselected cell by the terminal device and reducing resource overhead.

This application also provides a cell reselection method of another embodiment, namely Embodiment 2. The schematic flowchart of the cell reselection method of this embodiment may also be as shown in FIG. 3.

Step S301 is the same as in Embodiment 1, and will not be repeated here.

In step S302, the terminal device determines the first cell set used by the terminal device for cell reselection measurement according to its own location information and the first information, and measures the cells in the first cell set, and determines the terminal according to the measurement result The target cell for reselection of the device.

Optionally, the terminal device may determine the first cell set used for cell reselection measurement according to the distance between the terminal device and the second network device. Specifically, if the distance between the terminal device and the second network device is less than a threshold, the The cell covered by the second network device is determined as the first cell set.

Optionally, the terminal device determines, according to the location and movement direction of the terminal device, and the location of the second network device, a cell that may provide services for the terminal device in the future as the first set of cells.

Optionally, the first cell set determined by the terminal device includes the current serving cell.

Optionally, the first set of cells determined by the terminal device includes one or more of the identity of each cell, the frequency point of each cell, and the priority of each cell frequency point.

Optionally, the terminal device determines the cell with the best cell signal quality in the measurement result as the target cell for reselection.

Optionally, the terminal device determines the cell with the best quality among the cells whose cell signal quality exceeds a certain threshold in the measurement result as the target cell for cell reselection.

Optionally, the terminal device determines the cell with the highest priority of the frequency point where the cell is located in the measurement result and the signal quality of the cell exceeds a certain threshold as the target cell for reselection.

Optionally, the terminal device determines the cell whose signal quality of the cell becomes the fastest in the measurement result as the target cell for reselection.

Optionally, if the target cell determined by the terminal device is not the current serving cell, the terminal device performs the operation of reselecting to the target cell.

The terminal device first determines the first cell set for cell reselection measurement through the first information and the location information of the terminal device, and then determines the target cell for cell reselection through measurement, which can ensure the quality of the target cell for reselection and avoid The quality of the reselected target cell causes reselection again, thereby improving the reselection efficiency.

This application also provides a cell reselection method of another embodiment, namely Embodiment 3. The schematic flowchart of the cell reselection method of this embodiment may also be as shown in FIG. 3.

Optionally, in step S301, the first information may include information of the first cell, and the first cell may be the next cell that the terminal device needs to measure.

Optionally, in step S301, the first information may include information of a first cell, and the first cell may be a cell that the terminal device prefers to measure during cell reselection measurement.

Specifically, the first cell is the next cell determined by the network device that may provide services for the terminal device.

Optionally, the first information may also include information of multiple cells.

For example, the first information may also include X cell information, Y cell information, and Z cell information. This application does not limit the number of cell information contained in the first information.

Optionally, in a case where the first information only includes the information of the first cell, the terminal device only needs to measure the first cell and does not need to measure other cells.

Optionally, in a case where the first information only includes the information of the first cell, the terminal device preferentially measures the first cell.

Optionally, the information of the first cell may include the first cell identity.

Optionally, the first cell identity may be PCI or cell global identity.

Exemplarily, after the terminal device receives the first cell identifier in the information of the first cell, the terminal device can know which cell the terminal device needs to measure.

Optionally, the information of the first cell may also include the frequency point of the first cell.

Exemplarily, the terminal device can know the frequency point on which the terminal device subsequently measures the cell through the cell frequency.

Optionally, under the same base station, the frequency points of each cell may be different.

Exemplarily, among the information of the multiple cells included in the first information, the multiple cells may be cells within the coverage area of the first network device, or may be cells within the coverage area of other network devices. This application does not limit whether the multiple cells in the first information are within the coverage range of the first network device or other network devices.

Optionally, when the terminal device is in an idle or inactive state, the terminal device will read the system information broadcast by the first network device, and the first network device can know that the terminal device is relative to the first network device or the first network The geographic location of each cell in the device. The first network device specifies a cell to the terminal device according to the geographic location of the terminal device. This cell can be the cell of the first network device or the cell of other network devices. The cell may be the next camping cell that the terminal device needs to measure. The terminal device only needs to measure the cell assigned to the terminal device by the first network device, and the cell may also be one of the cells that the terminal device needs to measure.

Optionally, the information of the first cell may also include the cell quality threshold of the first cell.

Optionally, in step S302, the terminal device needs to measure the first cell when determining the target cell for reselection.

Optionally, the terminal device determines to start measuring the first cell according to the quality of the current serving cell, specifically, when the quality of the current serving cell is lower than a certain threshold, starts measuring the first cell.

Optionally, the terminal device determines to start measuring the first cell according to the quality change rule of the serving cell and the quality of the current serving cell. Specifically, when the quality of the serving cell is getting worse, and the quality of the serving cell is below a certain level At the threshold, start the measurement of the first cell.

Optionally, the terminal device determines whether the cell quality measurement value of the first cell exceeds the cell quality threshold of the first cell.

Specifically, if the cell quality measurement value of the first cell exceeds the cell quality threshold of the first cell, the terminal device determines that the first cell is the target cell reselected by the terminal device.

Optionally, the terminal device judges that the difference between the cell quality measurement value of the first cell and the cell quality measurement value of the current serving cell exceeds the first cell quality threshold. Specifically, if the cell quality measurement value of the first cell is different from the current cell quality measurement value The difference between the cell quality measurement values of the serving cell exceeds the first cell quality threshold, and the terminal device determines that the first cell is a target cell reselected by the terminal device.

Specifically, if within the first time, the cell quality measurement value of the first cell does not exceed the cell quality threshold value of the first cell or the difference between the cell quality measurement value of the first cell and the cell quality measurement value of the current serving cell The quality threshold of the first cell is not exceeded. At this time, the terminal device needs to measure the second cell, and the second cell may be any cell.

Optionally, the first time may be included in the first information.

Optionally, the first time may be predefined.

Optionally, when the terminal device measures the second cell, the terminal device may reacquire the information of the second cell sent by the first network device, or the terminal device may determine the second cell by itself, and the terminal device may then measure the second cell. It may also be the second cell determined by the terminal device according to the system information related to cell reselection broadcast by the current serving cell. This application does not limit how the terminal device obtains the information of the second cell.

In the traditional cell reselection measurement mechanism, the terminal device needs to measure the neighboring cell based on the neighboring cell information broadcast by the current serving cell. At this time, the terminal device needs to perform a large number of neighboring cell measurements. However, in non-terrestrial networks, due to the fixed satellite moving trajectory, in general, the potential target cell of the terminal device is determined, and the cell information of the potential target cell designated by the network device to the terminal, namely the first cell, the terminal device Prioritize the measurement of the cell information designated by the network equipment and select a suitable target cell as the reselection cell. When the terminal equipment cannot determine a suitable target cell as the reselection cell from the cells designated by the network, the terminal equipment can then Neighboring cell information broadcasted in the serving cell, and neighbor cell measurement. By measuring only or preferentially measuring the cells designated by the network equipment, the terminal equipment can reduce the number of cells that need to be measured for cell reselection measurement, and reduce the power consumption of the terminal equipment. After the terminal device determines the next camping cell of the terminal device, the terminal device needs to reselect the current camping cell to the next camping cell, and read the broadcast information of the next camping cell. In order to avoid the terminal equipment frequently reading the cell broadcast information when reselecting the cell. There is an urgent need to reduce the overhead of frequently reading cell broadcast information.

This application provides another embodiment of a cell reselection method, namely Embodiment 4. The schematic flowchart of this embodiment may also be shown in FIG. 3.

Optionally, in step S301, the first information may include a cell list.

Optionally, the cell list may include the identity of each cell. For example, that is, the cell list may include cell A, cell B, cell C..., and the cell identifier in the cell list can be used to know which cell the terminal device needs to measure.

Optionally, the cell list may include the index of each cell. For example, the cell index corresponding to cell A can be index 1, the cell index corresponding to cell B can be index 2, and the cell index corresponding to cell C can be index 3..., that is, the cell list can include index 1, index 2, index 3..., that is, the cells that can be included in the cell list are cell A corresponding to index 1, cell B corresponding to index 2, and cell C corresponding to index 3. Through the cell index in the cell list, you can know that the terminal device needs to measure Which cell is it? This application does not limit the correspondence between the cell index and the cell identity.

Optionally, the terminal device may only receive the main information block in the system information, and the main information block contains the frequency domain location information of the paging configuration.

Optionally, the cell list may include one cell or multiple cells that the terminal device needs to measure. For example, the cell list includes the cell where the terminal device is currently located.

Exemplarily, the cell list may include cell A, cell B, and cell C. This application does not limit the number of cells in the cell list. For example, the cell A, cell B, and cell C may have the cell where the terminal device is currently located, and the cell where the terminal device is currently located may be cell A. For another example, the cell A, cell B, and cell C may have a target cell that the terminal device needs to reselect, that is, the next cell where the terminal device resides.

Optionally, one or more cells in the cell list may be the identity of one or more cells, or the index of one or more cells, which is not limited in this application.

Optionally, the paging configuration time domain location information of each cell in the cell list is the same.

Optionally, the paging configuration time domain location information of each cell in the cell list may also be derived based on the paging configuration time domain location information of the current cell.

Optionally, the paging configuration time domain location information of each cell in the cell list may also be derived based on the PCI of the current cell.

Optionally, the first information may also include a first area identifier, and the paging configuration time domain location information of each cell in the first area is the same.

Optionally, the paging configuration time-domain location information of each cell in the first area may also be derived based on the paging configuration time-domain location information of the current cell.

Optionally, the paging configuration time domain location information of each cell in the first area may also be derived based on the PCI of the current cell.

Optionally, the first area may include one or more cells, which is not limited in this application.

In step S302, when determining the target cell for reselection, the terminal device needs to measure one or more cells in the cell list or in the first area until the terminal device finds a target cell for reselection that meets the requirements.

Optionally, the cells in the cell list or the cells in the first area may include the third cell.

Optionally, the above-mentioned first information may also include the cell quality threshold of each cell in the cell list or the cell quality threshold of each cell in the first area.

Optionally, the terminal device needs to determine whether the cell quality measurement value of the third cell exceeds the cell quality threshold of the third cell.

Specifically, if the cell quality measurement value of the third cell exceeds the cell quality threshold of the third cell, the terminal device determines that the third cell is a target cell reselected by the terminal device.

Specifically, if within the first time, the cell quality measurement value of the third cell does not exceed the cell quality threshold of the third cell, at this time, the terminal device needs to measure the fourth cell.

Optionally, the fourth cell may be a cell in the cell list or the fourth cell may be a cell in the first area.

Optionally, the terminal device will continuously measure the cells in the cell list or the cells in the first area, until a certain cell meets the cell quality requirements, the terminal device will determine the cell that meets the cell quality requirements as the terminal device reselection The target cell.

When the terminal device measures the reselected cell, it does not need to read the broadcast information frequently. It only needs to receive the main information block and perform the measurement according to the cells in the cell list or the cells in the first area, thereby reducing the terminal equipment The power overhead caused by frequently reading cell broadcast information.

The technical solution of the foregoing embodiment 3 can also be combined with the technical solution of the embodiment 1 and/or the embodiment 2, which will not be described in detail here.

Fig. 4 shows a schematic flowchart of a cell handover method according to an embodiment of the present application.

In step S401, the first network device may send location request information to the terminal device.

Optionally, in step S401, the first network device may also send a second trigger condition to the terminal device.

Optionally, the second trigger condition may be a second distance trigger condition.

Optionally, the second distance trigger condition may be: the distance that the terminal device moves exceeds a second threshold, and the second threshold is the distance value.

Optionally, the second trigger condition may also be a second time trigger condition.

Optionally, the second time trigger condition is: the first period value.

Optionally, the location request information is used to indicate that the terminal device needs to report the location information of the terminal device to the first network device when the second trigger condition is satisfied.

In step S402, the terminal device sends location request response information to the first network device.

Optionally, the location request response information is used to indicate location information of the terminal device.

Optionally, in a case where the distance moved by the terminal device exceeds the second threshold, the terminal device may report the location information of the terminal device to the first network device.

Optionally, at the first period value, the terminal device may report the location information of the terminal device to the first network device.

In step S403, the first network device determines whether the cell of the terminal device performs cell handover according to the location information of the terminal device.

In step S404, the first network device sends handover request information to the third network device.

In step S405, the first network device receives the handover response information sent by the third network device.

In step S406, the terminal device receives the handover configuration information sent by the first network device.

Optionally, the handover configuration information may include: random access resources and the first trigger condition.

Optionally, the first trigger condition may include a first distance trigger condition, and the first distance trigger condition is that the distance between the terminal device and the first location is less than the second threshold value.

The aforementioned first position may be a preset position. For example, the first location may be the edge of the target cell of the terminal device or the center of the target cell of the terminal device.

Optionally, the first trigger condition may also include a first time trigger condition. The first time trigger condition is: within the second time, the terminal device can detect the target cell, or the first time trigger condition may also be: When the second time arrives, the terminal device initiates a handover request to the target cell.

Optionally, the handover configuration information may also include location information of the third network device.

Optionally, the handover configuration information may also include the identity of the third network device.

Optionally, the handover configuration information may also include a cell deployment diagram of the third network device.

Optionally, the handover configuration information may also include the PCI of the cell where the third network device is deployed.

In step S407, the terminal device determines whether the terminal device meets the first trigger condition according to the location information of the cell where the third network device is deployed and the location information of the terminal device; if the terminal device meets the first trigger condition, step S408 is executed.

In step S408, the terminal device initiates random access to the third network device to switch to the third network device.

The terminal device determines whether the first trigger condition for cell handover is satisfied according to the location information of the cell deployed by the third network device and its own location, and the terminal device does not need to frequently report the cell measurement report to the first network device, thereby reducing signaling overhead.

FIG. 5 is a schematic structural diagram of a communication device provided by an embodiment of this application. The device 800 may include:

The processing unit 510 and the transceiver unit 520.

Optionally, the transceiver unit 520 is configured to receive first information from a first network device, and the first information includes first time information and information of a second network device corresponding to the first time information or the first information It includes the information of the first cell; the first cell is different from the cell where the terminal device currently resides; the processing unit 510 is configured to determine the target cell to be reselected by the communication device according to the first information.

Optionally, the first information includes the first time information and information of the second network device corresponding to the first time information.

Optionally, the first information includes information of the first cell.

Optionally, the information of the second network device includes at least one of the following: location information of the second network device, an identifier of the second network device, a cell deployment diagram of a cell where the second network device is deployed, and the second network The physical cell of the device identifies PCI or public land mobile network PLMN.

Optionally, the processing unit 510 is configured to determine a target cell to be reselected by the communication device according to the first information, including: the processing unit 510 is further specifically configured to: determine location information of the communication device; the processing unit 510 It is also specifically used to determine the target cell reselected by the communication device according to the first information and the location information of the communication device.

Optionally, the processing unit 510 is further specifically configured to: periodically determine the target cell reselected by the communication device according to the first information and the location information of the communication device.

Optionally, the processing unit 510 is further specifically configured to determine a target cell to be reselected by the communication device according to the first information and the location information of the communication device, including: the processing unit 510 is also specifically configured to determine a third cell Whether the preset condition is satisfied, the preset condition is determined according to the location information of the communication device, and the third cell is any cell of the second network device; if the communication device meets the preset condition, the The processing unit 510 is further specifically configured to determine the third cell as the target cell.

Optionally, the processing unit 510 is further configured to determine whether the target cell and the cell where the communication device resides are the same; when the target cell and the cell where the terminal device resides are not consistent, the processing unit 510 is also specifically configured to The communication device reselects from the camping cell to the target cell.

Optionally, the information of the first cell includes at least one of the following: an identifier of the first cell, a frequency point of the first cell, and a cell quality threshold of the first cell.

Optionally, the processing unit 510 only measures or preferentially measures the first cell.

Optionally, the processing unit 510 determines the target cell to be reselected by the terminal device according to the first information, including: the processing unit 510 is further specifically configured to determine whether the cell quality measurement value of the first cell exceeds the first cell quality measurement value. The cell quality threshold of the cell; if the cell quality measurement value of the first cell exceeds the cell quality threshold of the first cell, the processing unit 510 is further specifically configured to: determine that the first cell is the reselection of the communication device The target cell.

Optionally, the processing unit 510 is further configured to reselect the camping cell to the target cell.

Optionally, the first cell information further includes a first time, and the processing unit 510 is further configured to: within the first time, if the cell quality measurement value of the first cell does not exceed the cell quality threshold of the first cell The processing unit 510 is also specifically configured to measure the second cell, and the second cell may be any cell.

The processing unit optionally, the first information further includes a cell list, the cell list includes the cell where the communication device is currently located and the reselected target cell, and the paging configuration time domain location information of each cell in the cell list is the same, The communication device receives only the main information block in the system information from the second network device, and the main information block contains the frequency domain location information of the paging configuration.

Optionally, the paging configuration time domain location information of each cell in the cell list may also be derived based on the paging configuration time domain location information of the current cell.

Optionally, the paging configuration time domain location information of each cell in the cell list may also be derived based on the PCI of the current cell.

Optionally, the transceiving unit 520 is further configured to receive handover configuration information sent by the first network device, where the handover configuration information includes: random access resources, a first trigger condition, and a target cell identifier.

Optionally, the first trigger condition includes a first distance trigger condition or a first time trigger condition, and the first distance trigger condition is: the distance between the terminal device and the first location is less than a second threshold; the first time The trigger condition is: within the second time, the terminal device detects the target cell, or the first time trigger condition may also be: when the second time arrives, the terminal device initiates a handover request to the target cell.

Optionally, the first position may be a preset position. For example, the first location may be the edge of the target cell of the terminal device or the center of the target cell of the terminal device.

Optionally, the handover configuration information may further include at least one of the following: the identity of the third network device, the PCI of the cell where the third network device is deployed, the cell deployment map of the third network device, or the location information of the third network device.

Optionally, the processing unit 510 is further configured to determine whether the communication device meets the first trigger condition according to the handover configuration information and the location information of the terminal device; in the case that the communication device meets the first trigger condition, the The processing unit 510 is further configured to randomly access the third network device.

Optionally, the transceiving unit 520 is further configured to receive the location request information and the second trigger condition sent by the first network device; the transceiving unit 520 is further configured to send the location information of the communication device to the first network device.

Optionally, the second trigger condition includes a second distance trigger condition or a second time trigger condition, and the second distance trigger condition is: the distance that the terminal device moves exceeds a second threshold; the second time trigger condition is: One period value.

Optionally, that the transceiver unit 520 is further configured to send the location information of the terminal device to the first network device includes: when the communication device meets the above-mentioned second trigger condition, the transceiver unit 520 is further configured to send The network device sends the location information of the communication device.

It should be understood that the communication device in FIG. 5 may be a terminal device.

The communication device 500 provided in the present application may correspond to the process performed by the terminal device in the above-mentioned method embodiments of FIGS. 3 to 4. For the functions of the processing unit and the transceiver unit in the communication device, please refer to the above description, and the detailed description is omitted here. .

FIG. 5 may also be a schematic structural diagram of another communication device provided by an embodiment of the application.

Optionally, the processing unit 510 is configured to generate first information, where the first information includes first time information and information about a second network device corresponding to the first time information, or the first information includes information about the first cell. Information; the first cell is different from the cell where the terminal device currently resides; the transceiving unit 520: configured to send first information to the terminal device so that the terminal device can determine the terminal device to reselect according to the first information Target cell.

Optionally, the first information includes the first time information and information of the second network device corresponding to the first time information.

Optionally, the first information includes information of the first cell.

Optionally, the information of the second network device includes at least one of the following: location information of the second network device, an identifier of the second network device, a cell deployment diagram of a cell where the second network device is deployed, and the second network The physical cell of the device identifies PCI or public land mobile network PLMN.

Optionally, the information of the second network device is used to instruct the terminal device to determine the location information of the terminal device; the shown information of the second network device is also used to instruct the terminal device according to the information of the second network device and the The location information of the terminal device determines the target cell for the terminal device to reselect.

Optionally, the processing unit 510 is further specifically configured to: periodically determine the target cell reselected by the communication device according to the first information and the location information of the communication device.

Optionally, the processing unit 510 is further configured to determine whether the third cell satisfies a preset condition, the preset condition is determined according to the location information of the communication device, and the third cell is any cell of the second network device In the case that the third cell of the communication device meets the preset condition, the processing unit 510 is further configured to determine the third cell as a target cell.

Optionally, the processing unit 510 is also used to determine whether the target cell and the camping cell of the communication device are the same; in the case that the target cell and the camping cell of the communication device are inconsistent, the processing unit 510 also uses Reselect from the camping cell to the target cell.

Optionally, the information of the first cell includes at least one of the following: an identifier of the first cell, a frequency point of the first cell, and a cell quality threshold of the first cell.

Optionally, the first cell is a cell that the terminal device measures only or preferentially measures.

Optionally, the first cell information is used to instruct the terminal device to determine whether the cell quality measurement value of the first cell exceeds the cell quality threshold of the first cell; if the cell quality measurement value of the first cell exceeds the cell quality threshold The cell quality threshold of the first cell, and the first cell information is also used to instruct the terminal device to determine that the first cell is a target cell reselected by the terminal device.

Optionally, the processing unit 510 is further configured to instruct reselection from the camping cell to the target cell.

Optionally, the first cell information further includes a first time, and the first cell information is also used to indicate within the first time, if the cell quality measurement value of the first cell does not exceed the cell quality threshold of the first cell Value, the terminal device measures the second cell, and the second cell may be any cell.

Optionally, the first information further includes a cell list. The cell list includes the cell where the terminal device is currently located and the reselected target cell. The paging configuration time domain location information of each cell in the cell list is the same, and the terminal The device only receives the main information block in the system information from the second network device, and the main information block contains the frequency domain location information of the paging configuration.

Optionally, the paging configuration time domain location information of each cell in the cell list may also be derived based on the paging configuration time domain location information of the current cell.

Optionally, the paging configuration time domain location information of each cell in the cell list may also be derived based on the PCI of the current cell.

Optionally, the transceiver unit 520 is further configured to send handover configuration information to the terminal device, where the handover configuration information includes: random access resources and a first trigger condition.

Optionally, the foregoing first trigger condition includes a first distance trigger condition or a first time trigger condition, and the first distance trigger condition is: the distance between the terminal device and the first position is less than a second threshold; The time trigger condition is: within the second time, the terminal device detects the target cell, or the first time trigger condition can also be: at the moment when the second time arrives, the terminal device initiates handover to the target cell request.

Optionally, the first position may be a preset position. For example, the first location may be the edge of the target cell of the terminal device or the center of the target cell of the terminal device.

Optionally, the handover configuration information may further include at least one of the following: the identity of the third network device, the PCI of the cell where the third network device is deployed, the cell deployment diagram of the third network device, or the location information of the third network device .

Optionally, the transceiver unit 520 is further configured to send location request information and a second trigger condition to the terminal device; the transceiver unit 520 is also configured to receive location information sent by the terminal device; the processing unit 510 is also configured to The location information of the communication device determines whether the communication device performs cell handover.

Optionally, the second trigger condition includes a second distance trigger condition or a second time trigger condition, and the second distance trigger condition is: the distance that the terminal device moves exceeds a second threshold; the second time trigger condition is: One period value.

Optionally, that the transceiving unit 520 is further configured to receive the location information sent by the terminal device may include: when the terminal device satisfies the second trigger condition, the transceiver unit 520 is further configured to receive the location information sent by the terminal device . Optionally, the transceiving unit 520 is further configured to send handover request information to the third network device; the transceiving unit 920 is further configured to receive handover response information sent by the third network device.

It should be understood that the communication device in FIG. 5 may also be a network device.

The communication device 500 provided in the present application may also correspond to the process performed by the network device in the above-mentioned method embodiments of FIGS. 3 to 4. For the functions of the processing unit and the transceiver unit in the communication device, please refer to the above description, and the details are omitted here. description.

The embodiment of the present application also provides a communication device including a processor. The processor is coupled with the memory and can be used to execute instructions in the memory to implement the methods in the method embodiments in FIGS. 3 to 4 above. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface.

In an implementation manner, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver or an input/output interface.

In another implementation manner, the communication device is a chip configured in a terminal device. When the communication device is a chip configured in a terminal device, the communication interface may be an input/output interface.

The embodiment of the present application also provides a communication device including a processor. The processor is coupled with the memory and can be used to execute instructions in the memory to implement the methods in the method embodiments in FIGS. 3 to 4 above. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface.

In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation manner, the communication device is a chip configured in a network device. When the communication device is a chip configured in a network device, the communication interface may be an input/output interface.

Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

An embodiment of the present application also provides a processor, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in the method embodiment of FIGS. 3 to 4 described above.

In a specific implementation process, the foregoing processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by the transmitter, and the input circuit and output The circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.

The embodiment of the present application also provides a processing device including a processor and a memory. The processor is used to read instructions stored in the memory, and can receive signals through a receiver, and transmit signals through a transmitter, so as to execute the method in the method embodiments of FIGS. 3 to 4 described above.

Optionally, there are one or more processors, and one or more memories.

Optionally, the memory may be integrated with the processor, or the memory and the processor may be provided separately.

In the specific implementation process, the memory can be a non-transitory (non-transitory) memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be set in different On the chip, the embodiment of the present application does not limit the type of memory and the setting mode of the memory and the processor.

It should be understood that the related data interaction process, for example, sending instruction information may be a process of outputting instruction information from the processor, and receiving capability information may be a process of the processor receiving input capability information. Specifically, the processed output data can be output to the transmitter, and the input data received by the processor can come from the receiver. Among them, the transmitter and receiver can be collectively referred to as transceivers.

The aforementioned processing device may be a chip. The processor may be realized by hardware or software. When realized by hardware, the processor may be a logic circuit, integrated circuit, etc.; when realized by software, the processor may be a general-purpose processor. This is achieved by reading the software code stored in the memory, the memory may be integrated in the processor, may be located outside the processor, and exist independently.

The embodiments of the present application also provide a computer program product. The computer program product includes: a computer program (also called code, or instruction), which when the computer program is executed, causes the computer to execute the foregoing FIGS. 3 to 3 4 The method in the method embodiment.

The embodiments of the present application also provide a computer-readable medium that stores a computer program (also called code, or instruction) when it runs on a computer, so that the computer executes the above-mentioned FIGS. 3 to 3 4 The method in the method embodiment.

The embodiment of the present application also provides a communication system, including the aforementioned network device and terminal device.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in each embodiment 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.

If the function 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 this application essentially or the part that contributes to the existing technology or the 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 are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment 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 disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (25)

1. A method for cell reselection, characterized by comprising:

   The terminal device receives first information from a first network device, where the first information includes first time information and information about a second network device corresponding to the first time information or the first information includes information about a first cell ；

   The first cell is different from the cell where the terminal device currently camps;

   The terminal device determines the target cell to be reselected by the terminal device according to the first information.
2. The method according to claim 1, wherein the first information includes the first time information and information of a second network device corresponding to the first time information.
3. The method according to claim 1, wherein the first information includes information of the first cell.
4. The method according to claim 2, wherein the information of the second network device includes at least one of the following: location information of the second network device, an identifier of the second network device, and the second network device The cell deployment diagram of the network device, the physical cell identifier PCI or the public land mobile network PLMN of the second network device deployment cell.
5. The method according to claim 4, wherein the terminal device determining the target cell reselected by the terminal device according to the first information comprises:

   The terminal device determines the location information of the terminal device;

   The terminal device determines the target cell to be reselected by the terminal device according to the first information and the location information of the terminal device.
6. The method according to claim 4, wherein the terminal device determining the target cell reselected by the terminal device according to the first information comprises:

   The terminal device determines the location information of the terminal device;

   The terminal device determines a first cell set according to the first information and the location information of the terminal device;

   The terminal device measures cells in the first cell set;

   The terminal device determines a target cell to be reselected by the terminal device according to a measurement result of measuring cells in the first cell set.
7. The method according to claim 3, wherein the information of the first cell includes at least one of the following: the first cell identifier, the first cell frequency point, and the cell quality gate of the first cell Limit.
8. The method according to claim 7, wherein the terminal device only measures the first cell.
9. The method according to claim 8, wherein the terminal device determining the target cell to be reselected by the terminal device according to the first information comprises:

   The terminal device judges whether the cell quality measurement value of the first cell exceeds the cell quality threshold of the first cell;

   If the cell quality measurement value of the first cell exceeds the cell quality threshold of the first cell, the terminal device determines that the first cell is a target cell reselected by the terminal device.
10. The method according to any one of claims 7 to 9, wherein the first cell information further includes a first time, and the method further includes:

    In the first time, if the cell quality measurement value of the first cell does not exceed the cell quality threshold of the first cell, the terminal device measures the second cell.
11. The method according to any one of claims 1 to 10, wherein the first information further includes a cell list, and the cell list includes the cell in which the terminal device is currently located and the reselected target cell The time domain location information of the paging configuration of each cell in the cell list is the same, the terminal device receives only the main information block in the system information from the second network device, and the main information block contains the paging configuration frequency Domain location information.
12. A method for cell reselection, characterized by comprising:

    The first network device generates first information, where the first information includes first time information and information about a second network device corresponding to the first time information or the first information includes information about a first cell;

    The first cell is different from the cell where the terminal device currently camps;

    The first network device sends the first information to the terminal device, so that the terminal device determines the target cell to be reselected by the terminal device according to the first information.
13. The method according to claim 12, wherein the first information includes the first time information and information of a second network device corresponding to the first time information.
14. The method according to claim 12, wherein the first information includes information of the first cell.
15. The method according to claim 13, wherein the information of the second network device includes at least one of the following: location information of the second network device, an identifier of the second network device, and the second network device The cell deployment diagram of the network device, the physical cell identifier PCI or the public land mobile network PLMN of the second network device deployment cell.
16. The method according to claim 15, wherein the information of the second network device is used to instruct the terminal device to determine the location information of the terminal device;

    The information of the second network device shown is also used to instruct the terminal device to determine the target cell to be reselected by the terminal device according to the information of the second network device and the location information of the terminal device.
17. The method according to claim 14, wherein the information of the first cell includes at least one of the following: the first cell identifier, the first cell frequency point, and the cell quality gate of the first cell Limit.
18. The method according to claim 17, wherein the first cell is a cell that the terminal device only measures.
19. The method according to claim 18, wherein the first cell information is used to instruct the terminal device to determine whether the cell quality measurement value of the first cell exceeds the cell quality threshold value of the first cell ；

    If the cell quality measurement value of the first cell exceeds the cell quality threshold of the first cell, the first cell information is also used to instruct the terminal device to determine that the first cell is the terminal device The selected target cell.
20. The method according to any one of claims 17 to 19, wherein the first cell information further includes a first time, and the first cell information is also used to indicate that within the first time, if the first time The cell quality measurement value of the cell does not exceed the cell quality threshold of the first cell, and the terminal device measures the second cell.
21. The method according to any one of claims 12 to 20, wherein the first information further includes a cell list, and the cell list includes the cell where the terminal device is currently located and the reselected target cell The time domain location information of the paging configuration of each cell in the cell list is the same, and the terminal device receives only the main information block in the system information from the second network device, and the main information block contains the paging configuration frequency. Domain location information.
22. A communication device, characterized by comprising various modules or units for executing the method according to any one of claims 1-21.
23. A storage medium having a computer program or instruction stored on the storage medium, wherein the computer program or instruction is executed to cause a computer to execute the method according to any one of claims 1 to 21.
24. A chip system, comprising: a processor, configured to execute the method according to any one of claims 1 to 21.
25. A communication system, characterized by comprising a communication device for executing the method according to any one of claims 1 to 11, and/or for executing the method according to any one of claims 12 to 21 Method of communication device.

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