CN111565428B

CN111565428B - Cell reselection method and device

Info

Publication number: CN111565428B
Application number: CN201910726703.5A
Authority: CN
Inventors: 陈磊; 唐珣; 李秉肇; 许斌; 郑黎丽
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-02-14
Filing date: 2019-08-07
Publication date: 2022-10-25
Anticipated expiration: 2039-08-07
Also published as: CN111565428A

Abstract

The application provides a cell reselection method and a device, comprising the following steps: the method comprises the steps that a terminal device receives first information from a first network device, wherein the first information comprises first time information and information of a second network device corresponding to the first time information or the first information comprises information of a first cell; the first cell is different from a cell in which the terminal equipment currently resides; and the terminal equipment determines a target cell reselected by the terminal equipment according to the first information. The terminal equipment determines the target cell reselected by the terminal equipment according to the information of the network equipment corresponding to the first time or the first cell information sent by the network equipment, so that the terminal equipment is prevented from frequently carrying out cell measurement, and the resource overhead brought by the terminal equipment frequently carrying out cell measurement is reduced.

Description

Cell reselection method and device

Technical Field

The present application relates to the field of communications, and in particular, to a cell reselection method and apparatus.

Background

Since the conventional terrestrial network cannot provide seamless coverage for User Equipment (UE), especially in the sea, desert, air, and other places where base stations cannot be deployed. The non-terrestrial network is introduced into a 5G (5 th-generation) system, a base station or part of the base station functions are deployed on an aerial platform or a satellite to provide seamless coverage for UE, and the aerial platform or the satellite is less affected by natural disasters, so that the reliability of the 5G system can be improved. When the base station is deployed on a low earth orbit satellite, the cell serving the UE on the ground by the base station moves due to the high moving speed of the satellite. In order to ensure the continuity of the connected UE service, 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 perform measurement on a currently serving cell, that is, measurement of common or different frequencies.

In the process, due to the change of the cell service quality, the UE will continuously trigger the neighboring cell measurement of the same frequency or different frequencies, which wastes the resources and electric quantity of the UE, and meanwhile, the UE needs to continuously report the measurement result to perform cell switching, resulting in a large amount of signaling overhead. How to reduce the large amount of resource overhead of the UE in the process of cell reselection or cell handover is an urgent problem to be solved.

Disclosure of Invention

The application provides a cell reselection method and a cell reselection device, which can reduce resource overhead and power overhead of terminal equipment during cell reselection.

In a first aspect, a cell reselection method is provided, including: the method comprises the steps that a terminal device receives first information from a first network device, wherein the first information comprises first time information and information of a second network device corresponding to the first time information or the first information comprises information of a first cell; the first cell is different from a cell in which the terminal equipment currently resides; and the terminal equipment determines a target cell reselected by the terminal equipment according to the first information.

The terminal equipment determines the target cell reselected by the terminal equipment according to the information of the network equipment or the first cell information corresponding to a certain time sent by the network equipment, so that the frequent cell measurement of the terminal equipment is avoided, and the cost brought by the frequent cell measurement of the terminal equipment is reduced.

With reference to the first aspect, in certain 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 certain implementations of the first aspect, the first information includes information of the first cell.

With reference to the first aspect, in certain implementations of the first aspect, the information of the second network device includes at least one of: the location information of the second network device, the identifier of the second network device, the cell deployment map of the second network device, and the physical cell identifier PCI or public land mobile network PLMN of the deployed cell of the second network device. Optionally, the cell deployment map of the second network device may be a geographical location of each cell within a coverage area covered by the second network device relative to the second network device. The cell deployment map of the second network device may also be the location of each cell in the projection of the coverage area of the second network device on the ground. The cell deployment map 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 determining, by the terminal device, a target cell to be reselected by the terminal device according to the first information includes: the terminal equipment determines the position information of the terminal equipment; and the terminal equipment determines a target cell reselected by the terminal equipment according to the first information and the position information of the terminal equipment.

The terminal equipment determines the next resident cell of the terminal equipment according to the information of the second network equipment and the position information of the terminal equipment, which correspond to the first time information sent to the terminal equipment by the network equipment, so that frequent cell reselection measurement of the terminal equipment is avoided, and signaling overhead is reduced.

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

The terminal equipment periodically determines the next resident cell of the terminal equipment according to the information of the second network equipment and the position information of the terminal equipment, which correspond to the first time information sent to the terminal equipment by the network equipment, so that the terminal equipment can be positioned in the best service cell.

With reference to the first aspect, in some implementation manners of the first aspect, the determining, by the terminal device, a 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 equipment judges whether a third cell meets a preset condition, wherein the preset condition is determined according to the position information of the terminal equipment, and the third cell is any cell of the second network equipment; and under the condition that the terminal equipment meets the preset condition, the terminal equipment determines the third cell as a target cell.

The terminal equipment determines the next resident cell of the terminal equipment according to the preset conditions, so that the optimal next resident cell of the terminal equipment can be determined according to the actual condition of the terminal equipment.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal equipment determines the position information of the terminal equipment; the terminal equipment determines a first cell set according to the first information and the position information of the terminal equipment; the terminal equipment measures cells in the first cell set; and the terminal equipment determines a target cell reselected by the terminal equipment according to the measurement result of the measurement of the cells in the first cell set.

The terminal equipment determines a first cell set to be measured according to first information sent to the terminal equipment by the network equipment and position information of the terminal equipment, and then selects a reselected target cell according to a measurement result, so that the quality of the reselected target cell can be ensured, re-reselection caused by the quality problem of the reselected target cell is avoided, and the reselection efficiency is improved.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal equipment judges whether the target cell is consistent with the terminal equipment resident cell; and under the condition that the target cell is inconsistent with the terminal equipment resident cell, the terminal equipment reselects the target cell from the resident cell.

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

With reference to the first aspect, in certain implementations of the first aspect, the terminal device only measures or preferentially measures the first cell.

The terminal equipment only needs to measure the cell information appointed by the network equipment according to the cell information appointed by the network equipment, so that the terminal equipment can be prevented from frequently measuring the cell, and the signaling overhead is reduced. In a conventional cell reselection measurement mechanism, a terminal device needs to measure a neighboring cell according to neighboring cell information broadcast by a current serving cell. The network equipment assigns the cell information to the terminal equipment, and the terminal equipment preferentially measures the cell information assigned by the network equipment, so that the expense of the terminal equipment for measuring the adjacent cells can be reduced, and the power consumption of the terminal equipment is reduced. When the terminal device measures the cell information specified by the network device and does not meet the condition of reselecting the target cell, the terminal device can measure the neighboring cell again to ensure the quality of the reselected cell.

With reference to the first aspect, in certain implementations of the first aspect, the method includes: the terminal equipment judges whether the cell quality measurement value of the first cell exceeds the cell quality threshold value of the first cell; and if the cell quality measurement value of the first cell exceeds the cell quality threshold value of the first cell, the terminal equipment determines that the first cell is a target cell reselected by the terminal equipment. With reference to the first aspect, in certain implementations of the first aspect, the method further includes: and the terminal equipment reselects the target cell from the resident cell.

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

The network equipment sends the information of the next resident cell to be measured by the terminal equipment to the terminal equipment according to the positions of each cell and the terminal equipment of the network equipment, thereby avoiding the measurement of a large number of reselected cells by the terminal equipment and reducing the signaling overhead.

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

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

In order to avoid frequent reading of cell broadcast information by the terminal device after performing cell reselection. The network equipment sends the cells with the same paging configuration to the terminal equipment, and the terminal equipment is in an idle state or an inactive state after cell reselection, and does not need to read cell broadcast messages, so that the overhead of frequently reading the cell broadcast messages by the terminal equipment is reduced.

In a second aspect, a cell reselection method is provided, including: the method comprises the steps that a second network device generates first information, wherein the first information comprises first time information and information of the second network device corresponding to the first time information or the first information comprises information of a first cell; the first cell is different from a cell in which the terminal device currently resides; and the second network equipment sends first information to the terminal equipment so that the terminal equipment determines a target cell reselected by the terminal equipment according to the first information.

The network device sends the information of the network device or the first cell information corresponding to a certain time to the terminal device, so that the terminal device can be prevented from frequently carrying out cell measurement, and the expense caused by the terminal device frequently carrying out cell measurement is reduced.

With reference to the second aspect, in some implementations 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 implementations 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 location information of the second network device, the identifier of the second network device, the cell deployment map of the second network device, and the physical cell identifier PCI or public land mobile network PLMN of the deployed cell of the second network device. Optionally, the cell deployment map of the second network device may be a geographic location of each cell in a range covered by the second network device relative to the second network device. The cell deployment map of the second network device may also be the location of each cell in the projection of the coverage area of the second network device on the ground. The cell deployment map 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 location information of the terminal device; the information of the second network device is further used for indicating the terminal device to determine a target cell reselected by the terminal device according to the information of the second network device and the position information of the terminal device.

With reference to the second aspect, in some implementations of the second aspect, the information of the second network device is further used to instruct the terminal device to periodically 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 to determine whether a third cell meets a preset condition, where 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; and under the condition that the third cell of the terminal equipment meets the preset condition, the terminal equipment determines the third cell as a target cell.

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 to determine whether the target cell and the camping cell of the terminal device are consistent; and under the condition that the target cell is inconsistent with the terminal equipment resident cell, the terminal equipment reselects the target cell from the resident 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 first cell identification, the first cell frequency point and the cell quality threshold value of the first cell.

With reference to the second aspect, in some implementations of the second aspect, the first cell is a cell that is measured only or measured preferentially by the terminal device.

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 a cell quality measurement value of the first cell exceeds a 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 first cell information is further used for indicating the terminal device to determine that the first cell is a target cell reselected by the terminal device.

With reference to the second aspect, in some implementations of the second aspect, the first cell information is further used to instruct the terminal device to reselect from a camped cell to the target cell.

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

The network equipment assigns the first cell information to the terminal equipment, and correspondingly, the terminal equipment only needs to measure or preferentially measure the first cell information assigned by the network equipment, so that the terminal equipment can be prevented from frequently measuring the cells, and the signaling overhead is reduced.

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

The network equipment sends the cells with the same paging configuration to the terminal equipment, and the terminal equipment is in an idle state or an inactive state after cell reselection, so that cell broadcast messages do not need to be read, and the cost for frequently reading the cell broadcast messages by the terminal equipment is reduced.

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

With reference to the third aspect, in certain 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 distance between the terminal equipment and the edge of the target cell of the terminal equipment is smaller than a second threshold value; the first time trigger condition is as follows: in a second time, the terminal device detects the target cell, or the first time trigger condition may be: and at the moment when the second time is reached, the terminal equipment initiates a switching request to the target cell.

With reference to the third aspect, in certain implementations of the third aspect, the handover configuration information may further include at least one of: an identifier of the third network device, a PCI of the third network device to deploy a cell, a cell deployment map of the third network device, or location information of the third network device.

With reference to the third aspect, in certain implementations of the third aspect, the method further includes: the terminal equipment judges whether the terminal equipment meets a first trigger condition or not according to switching configuration information and position information of the terminal equipment; and under the condition that the terminal equipment meets a first trigger condition, the terminal equipment is randomly accessed to the third network equipment.

With reference to the third aspect, in certain implementations of the third aspect, the method further includes: the terminal equipment receives the position request information and a second trigger condition sent by the first network equipment; the terminal equipment sends the position information of the terminal equipment to the first network equipment; and the first network equipment judges whether the terminal equipment carries out cell switching or not according to the position information of the terminal equipment.

With reference to the third aspect, in certain 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 moving distance of the terminal equipment exceeds a second threshold value; the second time trigger condition is as follows: a first period value.

With reference to the third aspect, in some implementations of the third aspect, the sending, by the terminal device, the location information of the terminal device to the first network device includes: and under the condition that the terminal equipment meets the second trigger condition, the terminal equipment sends the position information of the terminal equipment to the first network equipment.

The terminal equipment judges whether the terminal equipment performs cell switching according to the position information of the terminal equipment and the first trigger condition, so that the terminal equipment does not need to report a cell measurement report to the network equipment frequently, and signaling overhead can be reduced.

In a fourth aspect, a communication apparatus is provided, including: the receiving and sending unit is used for receiving first information from a first network device, wherein the first information comprises first time information and information of a second network device corresponding to the first time information or the first information comprises information of a first cell; the first cell is different from a cell in which the terminal device currently resides; the processing unit is configured to determine a target cell reselected by the communication device according to the first information.

With reference to the fourth aspect, in some implementations 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 implementations 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 location information of the second network device, the identifier of the second network device, the cell deployment map of the second network device, the physical cell identifier PCI of the deployed cell of the second network device, or the public land mobile network PLMN.

With reference to the fourth aspect, in some implementations of the fourth aspect, the processing unit configured to determine a target cell for reselection by the communication apparatus according to the first information includes: the processing unit is further specifically configured to: determining location information of the communication device; the processing unit is further specifically configured to: and determining a target cell reselected by the communication device according to the first information and the position information of the communication device.

With reference to the fourth aspect, in some implementations of the fourth aspect, the processing unit, determining a reselected target cell according to the first information, includes: the processing unit is further specifically configured to: determining location information of the communication device; determining a first cell set according to the first information and the position information of the terminal equipment, measuring cells in the first cell set, and determining a target cell reselected by the terminal equipment according to a measurement result of the measurement of the cells in the first cell set;

with reference to the fourth aspect, in some implementations of the fourth aspect, the processing unit is further specifically configured to: and periodically determining a target cell reselected by the communication device according to the first information and the position information of the communication device.

With reference to the fourth aspect, in some implementations of the fourth aspect, the processing unit is further specifically configured to: determining a target cell for reselection by the communication device according to the first information and the location information of the communication device, comprising: the processing unit is further specifically configured to determine whether a third cell meets a preset condition, where the preset condition is determined according to the location information of the communication apparatus, and the third cell is any cell of the second network device; the processing unit is further specifically configured to determine a third cell as the target cell if the communication apparatus satisfies the preset condition.

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 camped cell of the communication apparatus are consistent; in case the target cell and the terminal equipment camping cell do not coincide, the processing unit is further specifically configured to reselect the target cell from the camped cell by the communication device.

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

With reference to the fourth aspect, in certain implementations of the fourth aspect, the processing unit measures or prioritizes measuring only the first cell.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the determining, by the processing unit, a target cell for reselection by the terminal device according to the first information includes: the processing unit is further specifically configured to: judging 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 processing unit is further specifically configured to: determining the first cell as a target cell for reselection by the communication device.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the processing unit is further configured to reselect to the target cell from the camped cell.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first cell information further includes a first time, and the processing unit is further configured to: in a first time, if the cell quality measurement value of the first cell does not exceed the cell quality threshold value of the first cell, the processing unit is further specifically configured to: a second cell is measured, which may be any one of the cells.

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

With reference to the fourth aspect, in some implementation manners 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, a first trigger condition and a target cell identification.

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 distance between the communication device and the edge of the target cell of the terminal equipment is smaller than a second threshold value; the first time trigger condition is as follows: in the second time, the processing unit detects the target cell, or the first time trigger condition may be: and at the time of reaching the second time, the processing unit is used for initiating a switching request to the target cell.

With reference to the fourth aspect, in some implementations of the fourth aspect, the handover configuration information may further include at least one of: an identifier of the third network device, a PCI of the third network device to deploy a cell, a cell deployment map of the third network device, or location information of the third network device.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the processing unit is further configured to determine whether the communication apparatus satisfies a first trigger condition according to the handover configuration information and the location information of the terminal device; the processing unit is further configured to randomly access the third network device if the communication apparatus satisfies a first trigger condition.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is further configured to receive the location request information and the second trigger condition sent by the first network device; the transceiver unit is further configured to send location information of the communication apparatus to the first network 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 moving distance of the terminal equipment exceeds a second threshold value; the second time trigger condition is as follows: a first period value.

With reference to the fourth aspect, in some implementations of the fourth aspect, the sending, by the transceiver unit, the location information of the terminal device to the first network device further includes: and the transceiver unit is further configured to send location information of the communication apparatus to the first network device when the communication apparatus satisfies the second trigger condition.

In a fifth aspect, a communication apparatus is provided, including: a transceiving unit and a processing unit, the processing unit: the first information is used for generating first information, wherein the first information comprises first time information and information of second network equipment corresponding to the first time information or the first information comprises information of a first cell; the first cell is different from a cell in which the terminal device currently resides; the transceiver unit: the method is used for sending first information to the terminal equipment so that the terminal equipment can determine a target cell reselected by the terminal equipment according to the first information.

With reference to the fifth aspect, in certain implementations 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 certain implementations of the fifth aspect, the first information includes information of the first cell.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the information of the second network device includes at least one of: the location information of the second network device, the identifier of the second network device, the cell deployment map of the second network device, the physical cell identifier PCI of the deployed cell of the second network device, or the public land mobile network PLMN.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the information of the second network device is used to instruct the terminal device to determine location information of the terminal device; the information of the second network device is further used for indicating the terminal device to determine a target cell reselected 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 certain implementations of the fifth aspect, the processing unit is further specifically configured to: and periodically determining a target cell reselected by the communication device according to the first information and the position information of the communication device.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the processing unit is further configured to determine whether a third cell meets a preset condition, where the preset condition is determined according to the location information of the communication apparatus, and the third cell is any cell of the second network device; the processing unit is further configured to determine a third cell as a target cell if the third cell of the communication apparatus satisfies the preset condition.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the processing unit is further configured to determine whether the target cell and the camped cell of the communication apparatus coincide; the processing unit is further configured to reselect to the target cell from the camped cell if the target cell and the camped cell of the communication device do not coincide.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the information of the first cell includes at least one of: the first cell identifier, the first cell frequency point, and the cell quality threshold of the first cell.

With reference to the fifth aspect, in some implementations 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 a cell quality measurement value of the first cell exceeds a 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 first cell information is further used for indicating the terminal device to determine that the first cell is a target cell reselected by the terminal device.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the processing unit is further configured to indicate reselection by the camped cell to the target cell.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the first cell information further includes a first time, and the first cell information is further used to indicate that, in the first time, if the cell quality measurement value of the first cell does not exceed the cell quality threshold value of the first cell, the terminal device measures a second cell, where 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, the cell list includes a cell where the terminal device is currently located and the reselected target cell, paging configuration time domain location information of each cell in the cell list is the same, the terminal device receives only a master information block in system information from the second network device, and the master information block includes paging configuration frequency domain location information.

With reference to the fifth aspect, in some implementation manners 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, a first trigger condition.

With reference to the fifth aspect, in certain 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 distance between the terminal equipment and the edge of the target cell of the terminal equipment is smaller than a second threshold value; the first time trigger condition is as follows: in a second time, the terminal device detects the target cell, or the first time trigger condition may be: and at the moment when the second time arrives, the terminal equipment initiates a switching request to the target cell.

With reference to the fifth aspect, in some implementations of the fifth aspect, the handover configuration information may further include at least one of: an identifier of the third network device, a PCI of the third network device to deploy a cell, a cell deployment map of the third network device, or location information of the third network device.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the transceiver unit is further configured to send location request information and a second trigger condition to the terminal device; the receiving and sending unit is also used for receiving the position information sent by the terminal equipment; the processing unit is further configured to determine whether the terminal device performs cell switching according to the location information of the communication device.

With reference to the fifth aspect, in certain 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 moving distance of the terminal equipment exceeds a second threshold value; the second time trigger condition is as follows: a first period value.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the receiving and sending unit is further configured to receive the location information sent by the terminal device, and the receiving and sending unit is further configured to: and the transceiver unit is further configured to receive location information sent by the terminal device when the terminal device meets the second trigger condition.

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

In a sixth aspect, a communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute the instructions in the memory to implement the method of the first aspect, the third aspect, or any possible implementation manner of the first aspect or the third aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface.

In one implementation, 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, the communication device is a chip configured in the terminal equipment. 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 communications apparatus is provided that includes a processor. The processor is coupled to the memory and is operable to execute the instructions in the memory to implement the method of the second aspect or any of the possible implementations of the second aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, and the processor is coupled to 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, the communication device is a chip configured in the 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. Alternatively, the input/output interface may be an input/output circuit.

In an eighth aspect, a processor is provided, comprising: input circuit, output circuit and 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 performs the method in any one of the possible implementations of the first to third aspects and the first to third aspects.

In a specific implementation process, the 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, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the signal output by the output circuit may be output to and transmitted by a transmitter, for example and without limitation, and the input circuit and the output circuit may be the same circuit that functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the present application does not limit the specific implementation manner of the processor and various circuits.

In a ninth aspect, a processing apparatus is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory, and may receive a signal through the receiver and transmit a signal through the transmitter to perform the method of any one of the possible implementations of the first to third aspects and the first to third aspects.

Optionally, the number of the processors is one or more, and the number of the memories is one or more.

Alternatively, the memory may be integral with the processor or separate from the processor.

In a specific implementation process, the memory may be a non-transient memory, such as a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips.

It will be appreciated that the associated data interaction process, for example, sending the indication information, may be a process of outputting the indication information from the processor, and receiving the capability information may be a process of receiving the input capability information from the processor. Specifically, the data output by the processor may be output to the transmitter, and the input data received by the processor may be from the receiver. The transmitter and receiver may be collectively referred to as a transceiver, among others.

The processing means in the above ninth aspect may be one chip. The processor may be implemented by hardware or software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated with the processor, located external to the processor, or stand-alone.

In a tenth aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions), which when executed, causes a computer to perform the method of any one of the possible implementations of the first to third aspects and the first to third aspects described above.

In an eleventh aspect, a computer-readable medium is provided, which stores a computer program (which may also be referred to as code or instructions) that, when executed on a computer, causes the computer to perform the method of any one of the possible implementations of the first to third aspects and the first to third aspects.

In a twelfth aspect, a communication system is provided, which includes the foregoing network device and terminal device.

Drawings

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

Fig. 2 shows a flow chart of cell handover.

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

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

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

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (GSM) systems, code Division Multiple Access (CDMA) systems, wideband Code Division Multiple Access (WCDMA) systems, general Packet Radio Service (GPRS), long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD), universal Mobile Telecommunications System (UMTS), worldwide Interoperability for Microwave Access (WiMAX) communication systems, future fifth generation (5 g) systems, or New Radio (NR) systems, etc.

For the understanding of the embodiments of the present application, a communication system suitable for the method provided in the embodiments of the present application will be first described in detail with reference to fig. 1. Fig. 1 shows a schematic diagram of a communication system 100 suitable for the method provided by the embodiment of the present application. As shown, 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 shown in fig. 1; the communication system 100 may further include at least one terminal device, such as User Equipments (UEs) 1 to 9 shown in fig. 1. The network device and each terminal device can communicate through a wireless link. 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 UEs 1 to 6 in fig. 1 may constitute one communication system; the satellite stations and UEs 7 to 9 in fig. 1 may also constitute a communication system. In addition, the base station and the satellite station are connected to the core network device in different ways, and mutual data transmission can be performed between the base station and the core network device. In the present architecture, there may be multiple satellite stations or multiple base stations, and the satellite stations may also serve UEs similar to UEs 1 to UE 6. This is not a limitation of the present application.

The terminal devices in the communication system 100, e.g., UE 4 to UE 6, may also constitute a communication system. For example, UE 5 may control UE 4 and UE 6 to perform corresponding instructions. This is not a limitation of the present application.

It should be understood that the network device in the communication system may be any device having a wireless transceiving function. The network devices include, but are not limited to: an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (WiFi) system, a wireless relay Node, a wireless backhaul Node, a Transmission Point (TP), or a transmission point (TRP), and may also be 5G, such as NR, a gbb in a system, or a transmission point (TRP or TP), one or a group (including multiple antennas) of a base station in a 5G system, and may also be a panel, such as a panel, a Radio Network Controller (RNC), a base station transceiver station (BBU), or a distributed Node B (BBU).

In some deployments, the gNB may include Centralized Units (CUs) and DUs. The gNB may further include a Radio Unit (RU). The CU implements part of the function of the gNB, and the DU implements part of the function of the gNB, for example, the CU implements Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP) layers, and the DU implements Radio Link Control (RLC), medium Access Control (MAC) and Physical (PHY) layers. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as the RRC layer signaling, may also be considered to be transmitted by the DU or the DU + CU under this architecture. It is to 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 may be divided into network devices in a Radio Access Network (RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

Terminal equipment in the embodiments of the present application may refer to user equipment, access terminals, subscriber units, subscriber stations, mobile stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents, or user devices. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

By way of example and not limitation, in embodiments of the present invention, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device has full functions and large size, and can realize complete or partial functions without depending on a smart phone, for example: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

In addition, in the embodiment of the present invention, the terminal device may also be a terminal device in an internet of things (IoT) system, where IoT is an important component of future information technology development, and the main technical feature of the present invention is to connect an article with a network through a communication technology, so as to implement an intelligent network with interconnected human-computer and interconnected objects.

In the embodiment of the present invention, the IOT technology may implement massive connection, deep coverage, and terminal power saving through a narrowband (narrow band) NB technology, for example. For example, the NB includes only one Resource Block (RB), i.e., the bandwidth of the NB is only 180KB. The communication method of the embodiment of the invention can effectively solve the congestion problem of the mass terminals in the IOT technology when accessing the network through the NB.

The network device in this embodiment may be a device for communicating with a terminal device, and the network device may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) system or a Code Division Multiple Access (CDMA) system, may also be a base station (NodeB ) in a Wideband Code Division Multiple Access (WCDMA) system, may also be an evolved NodeB, eNB, or eNodeB in an LTE system, may also be a wireless controller in a cloud radio access network (cloud radio access network, cn) scenario, or may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network, and the like, may be an Access Point (AP) in a wireless network access point (WLAN AP), and may be a WLAN NR system, which is not limited by this example.

In addition, in this embodiment of the present invention, the access network device provides a service for a cell, and the terminal device communicates with the access network device through a transmission resource (for example, a frequency domain resource or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the access network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell (small cell), and the small cell may include: urban cells (metro cells), micro cells (pico cells), femto cells (pico cells), and the like, and these small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-rate data transmission services.

In addition, multiple cells can simultaneously work at the same frequency on a carrier in an LTE system or a 5G system, and under some special scenes, the concepts of the carrier and the cells can also be considered to be equivalent. For example, in a Carrier Aggregation (CA) scenario, when a secondary carrier is configured for a UE, a carrier index of the secondary carrier and a Cell identification (Cell ID) of a secondary Cell operating on the secondary carrier are carried at the same time, and in this case, the concepts of the carrier and the Cell may be considered to be equivalent, for example, it is equivalent that the UE accesses one carrier and one Cell.

The core network device may be connected with a plurality of access network devices for controlling the access network devices, and may distribute data received from a network side (e.g., the internet) to the access network devices.

The functions and specific implementations of the terminal device, the access network device and the core network device listed above are merely exemplary, and the present invention is not limited thereto.

In the embodiment of the present application, the terminal device or the network device includes a hardware layer, an operating system layer running on top of 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 a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. Furthermore, the embodiment of the present application does not particularly limit the specific structure of the execution main body of the method provided by the embodiment of the present application, as long as the communication can be performed according to the method provided by the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, for example, the execution main body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module capable of calling the program and executing the program in the terminal device or the network device.

It should also be understood that fig. 1 is a simplified schematic diagram that is merely illustrated for ease of understanding, and that other network devices or other terminal devices, which are not shown in fig. 1, may also be included in the communication system 100.

To facilitate understanding of the embodiments of the present application, a brief description will first be made of several concepts referred to hereinafter.

1. Non Terrestrial Networks (NTN): the NTN is introduced into a 5G system, seamless coverage is provided for the UE by deploying the functions of the base station or part of the base station on a high-altitude platform or a satellite, the high-altitude platform or the satellite is less affected by natural disasters, and the reliability of the 5G system can be improved. When the base station is deployed on a low earth orbit satellite, due to the high moving speed of the satellite, the cell serving the UE on the ground by the base station moves along with the satellite, for example, a low earth satellite with a height of 1000km, the radius of the cell on the ground is 200km, and the time from entering the cell to exiting the cell by the terminal is about 1min. Although the satellite moves at a high speed, the moving track of the satellite is relatively fixed and can be represented by a track diagram, that is, the absolute position of the satellite at a certain moment can be known by the track diagram.

2. Public Land Mobile Network (PLMN): a network established and operated by the government or its approved operator for the purpose of providing land mobile services to the public. The PLMN is typically interconnected with a Public Switched Telephone Network (PSTN) to form a communications network on a regional or national scale. A PLMN is a wireless communication system intended for land-based mobile users, such as vehicles or pedestrians.

3. Random Access Channel (RACH), which is a channel used by a mobile station to transmit information to a base station when the mobile station randomly accesses a network. The transmitted information includes: a response to the base station paging message; access when a mobile station originates a call. And the mobile station also applies to the base station for assignment of a separate dedicated control channel, which is an uplink channel, on this channel.

4. Master Information Block (MIB): is a main information message in a Wideband Code Division Multiple Access (WCDMA) network. The master information block includes scheduling information of a PLMN identity and Scheduling Block (SB) or a System Info Block (SIB). For broadcasting the current cell information status to the terminal device.

5. Cell switching: in cellular networks, to ensure continuity of connected UE service, the network triggers handover of the UE when the UE moves to the edge of a cell. Fig. 2 shows a flow chart of cell handover. The handover procedure in the general case comprises four steps:

(1) The original base station sends measurement configuration information to the UE, namely the UE needs to measure which switching requirement parameters;

(2) UE measures and reports a measurement report to the original base station when the switching requirement is met;

(3) The original base station performs switching judgment according to the measurement report and by combining an algorithm strategy;

(4) The original base station sends switching request information to the target base station, and the target base station determines whether the terminal equipment can be served according to the self condition and sends switching response information to the original base station;

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

(6) The terminal equipment randomly accesses the target base station when performing handover execution.

6. Cell reselection (cell reselection): refers to a process of selecting a best cell to provide a service signal by monitoring the signal quality of a neighboring cell and a current cell by a UE in an idle mode. After the UE successfully camps, the current serving cell measurement will be continuously performed. The UE compares the Reference Signal Receiving Power (RSRP) of the current serving cell with a threshold 1 (same frequency measurement start threshold) and a threshold 2 (different frequency/different system measurement start threshold), and uses the comparison as a judgment condition for whether to start the neighboring cell measurement. And if the RSRP of the current cell is less than the threshold 1, performing co-frequency measurement, and if the current cell has a low-priority or same-priority frequency adjacent cell and the RSRP of the current cell is less than the threshold 2, performing inter-frequency measurement. Namely, the 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 the satellite, the cell in which the UE resides will always change even if the UE does not move. In the process, due to the change of the service quality of the cell where the UE resides, the UE will continuously trigger the neighboring cell measurement of the same frequency/different frequency, which wastes the resources and electric quantity of the UE. Meanwhile, the UE needs to report the measurement result continuously to perform cell handover, which results in a large amount of signaling overhead.

Therefore, it is desirable to provide a method capable of reducing signaling overhead, and the following detailed description of the embodiments of the present application is made with reference to fig. 3.

To facilitate understanding of the embodiments of the present application, the following descriptions will be made before describing the embodiments of the present application.

First, in the embodiments of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. If the information indicated by a certain piece of information (e.g., the first indication information described below) is referred to as information to be indicated, in a specific implementation process, there are many ways to indicate the information to be indicated, for example, but not limited to, the information to be indicated may be directly indicated, such as the information to be indicated itself or an index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein an association relationship exists 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, while the other part of the information to be indicated is known or predetermined. For example, the indication of the specific information may be implemented by means of a predetermined arrangement order of the respective information (e.g., protocol specification), thereby reducing the indication overhead to some extent.

Second, the first, second and various numerical numbers in the embodiments shown below are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application. For example, different indication information is distinguished.

Third, the "plurality" referred to in the embodiments of the present application means two or more. "one or more of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (or more) of a, b, and c may represent: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c, wherein a, b and c can be single or multiple.

The method provided by the embodiment of the 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 in 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, and the 4 embodiments are described in detail below.

Example 1

In step S301, the terminal device receives first information.

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

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

Optionally, the terminal device may acquire the first information from 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 and the first network device performs an attach response reply, the first network device sends the first information to the terminal device through a dedicated signaling.

Optionally, the first information may include first time information and 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 motion trajectory information of the second network device within a certain time.

Optionally, the second network device may be the same as the first network device, or may be different from the first network device. This is not a limitation of the present application.

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

For example, the first information may further include information of an a-th network device corresponding to the first time, and the first information may further include information of a B-th network device corresponding to the first time.

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 a geographical location of the second network device relative to the terminal device, or may be absolute geographical location information of the second network device.

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

For example, the identity of the second network device may be network device a. Also for example, the identity of the second network device may be network device B. The specific form of the identifier of the second network device is not limited in this application.

Optionally, the information of the second network device may further 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. The specific form of the index of the second network device is not limited in the present application. Optionally, the information of the second network device may include a Physical Cell Identifier (PCI) of the second network device deployment cell. 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 second network device deployment cell may also be an index of the second network device deployment cell. This is not a limitation of the present application.

Alternatively, the second network device may be a network device communicating with the terminal device, for example, the second network device may be a satellite station shown in fig. 1, and the terminal device may be any one of the terminal devices UE 7, UE 8, and UE 9. 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 a base station shown in fig. 1, and the terminal device may be any one of the terminal devices UE 7, UE 8, and UE 9. This is not a limitation of the present application.

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

For example, the cell deployment map of the second network device may be the geographical location of each cell within the coverage area of the second network device relative to the second network device. The cell deployment map of the second network device may also be the location of each cell in the projection of the coverage area of the second network device on the ground. The cell deployment map of the second network device may also be the transmission angles and transmission powers of the respective cell antennas of the second network device.

For example, the coverage area of the second network device includes a cell 1, a cell 2, and a cell 3, and the cell deployment map of the second network device may be a geographical location relationship map of the cell 1, the cell 2, and the cell 3 with respect to the second network device, may be a spatial geographical location correlation map, or may be a geographical location relationship map in which the coverage area of the second network device is projected onto the ground. The present application does not limit this, and the present application does not limit the number of cells within the coverage area of the second network device.

Optionally, the information of the second network device may further include a Public Land Mobile Network (PLMN).

In step S302, a reselected target cell 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.

Alternatively, 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 absolute geographical location information of the terminal device.

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

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

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

Alternatively, the first threshold may be predetermined, and the first threshold is a distance threshold.

Optionally, the terminal device determines that the third cell is the target cell when the distance between the edge of the third cell and the terminal device is smaller than the first threshold.

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

Optionally, after the terminal device determines 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, when the target cell and the current camped cell of the terminal device are not consistent, the terminal device reselects the target cell from the current camped cell.

The terminal device determines the next resident cell of the terminal device according to the position information of the terminal device and the information of the second network device, thereby avoiding frequent measurement of reselecting cells by the terminal device and reducing resource overhead.

The present application further provides a cell reselection method according to another embodiment, that is, embodiment 2. A schematic flow chart of the cell reselection method of this embodiment may also be as shown in fig. 3.

Step S301 is the same as embodiment 1, and is not repeated herein.

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

Optionally, the terminal device may determine the first set of cells for cell reselection measurement according to a distance between the terminal device and the second network device, and specifically, if the distance between the terminal device and the second network device is smaller than a threshold, determine a cell covered by the second network device as the first set of cells.

Optionally, the terminal device determines, as the first set of cells, cells that may serve the terminal device for a future period of time according to the position and the moving direction of the terminal device and the position of the second network device.

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

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

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

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

Optionally, the terminal device determines a cell, in which the frequency point of the cell in the measurement result has the highest priority and the signal quality of the cell exceeds a certain threshold, as a reselected target cell.

Optionally, the terminal device determines the cell with the highest signal quality strengthening speed in the measurement result as the reselected target cell.

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

The terminal equipment determines a first cell set for cell reselection measurement through the first information and the position information of the terminal equipment, and then determines a target cell for cell reselection through measurement, so that the quality of the reselected target cell can be ensured, re-reselection caused by the quality problem of the reselected target cell is avoided, and the reselection efficiency is improved.

The present application also provides a cell reselection method of another embodiment, embodiment 3. A schematic flow chart 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 a first cell, where the first cell may be a next cell to be measured by the terminal device.

Optionally, in step S301, the first information may include information of a first cell, where the first cell may be a cell that is preferentially measured by the terminal device in the cell reselection measurement.

Specifically, the first cell is a next cell determined by the network device and likely to provide service for the terminal device.

Optionally, the first information may further include information of a plurality of cells.

For example, the first information may further include information of an X cell, information of a Y cell, and information of a Z cell, and the number of cells included in the first information is not limited in the present application.

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

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

Alternatively, the first cell identity may be a PCI, or a cell global identity.

For example, when the terminal device receives the first cell identifier in the information of the first cell, the terminal device may know which cell the terminal device needs to measure.

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

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

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

For example, in the information of multiple cells included in the first information, the multiple cells may be cells within a coverage area of the first network device, or may also be cells within a coverage area of another network device. The present application does not limit whether the plurality of cells in the first information are within the coverage of the first network device or within the coverage of other network devices.

Optionally, when the terminal device is in an idle state or an inactive state, the terminal device may read system information broadcast by the first network device, and the first network device may know a geographical position of the terminal device relative to the first network device or each cell in the first network device, and the first network device may designate a cell to the terminal device according to the geographical position of the terminal device, where the cell may be a cell of the first network device or a cell of another network device, and meanwhile, the cell may be a next resident cell that the terminal device needs to measure, and the terminal device only needs to measure a cell that the first network device designates to the terminal device, and the cell may also be one of cells that the terminal device needs to measure.

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

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

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

Optionally, the terminal device determines to start measurement on the first cell according to a quality change rule of the serving cell and a quality of a current serving cell, and specifically, starts measurement on the first cell when the quality of the serving cell is deteriorating and the quality of the serving cell is lower than a certain threshold.

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

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

Optionally, the terminal device determines that a difference between the cell quality measurement value of the first cell and the cell quality measurement value of the current serving cell exceeds a first cell quality threshold, and specifically, if 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, the terminal device determines that the first cell is a target cell reselected by the terminal device.

Specifically, if the cell quality measurement value of the first cell does not exceed the cell quality threshold 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 does not exceed the first cell quality threshold in the first time, at this time, the terminal device needs to measure the second cell, which may be any cell.

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

Optionally, the first time may be predefined.

Optionally, the terminal device may measure the second cell, where the terminal device obtains information of the second cell sent by the first network device again, or the terminal device determines the second cell by itself, and then the terminal device measures the second cell, or the terminal device determines the second cell according to system information related to cell reselection broadcasted by the current serving cell, and how the terminal device obtains the information of the second cell is not limited in the present application.

In a conventional cell reselection measurement mechanism, a terminal device needs to measure a neighboring cell according to neighboring cell information broadcasted by a current serving cell, and at this time, the terminal device needs to perform a large amount of neighboring cell measurements. However, in a non-terrestrial network, since a satellite movement trajectory is fixed, in general, a potential target cell of a terminal device is determined, cell information of the potential target cell, that is, a first cell, is assigned to a terminal by a network device, and the terminal device preferentially measures the cell information assigned by the network device and selects an appropriate target cell as a reselected cell. The terminal equipment only measures or preferentially measures the cell designated by the network equipment, so that the number of cells needing to be measured in cell reselection measurement can be reduced, and the power consumption of the terminal equipment is reduced. After the terminal device determines the next cell where the terminal device resides, the terminal device needs to reselect the current cell where the terminal device resides to the next cell where the terminal device resides, and read the broadcast information of the next cell where the terminal device resides. In order to avoid frequent reading of cell broadcast information when the terminal device performs cell reselection. There is a need to reduce the overhead of frequently reading cell broadcast information.

The present application provides another embodiment of a cell reselection method, that is, embodiment 4, and a schematic flowchart of this embodiment may also be as shown in fig. 3.

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

Optionally, the cell list may include an identifier of each cell. For example, the cell list may include cell a, cell B, and cell C \8230, and it can be known which cell the terminal device needs to measure through the cell identifier in the cell list.

Optionally, the cell list may include indexes of the respective cells. For example, the cell index corresponding to the cell a may be an index 1, the cell index corresponding to the cell B may be an index 2, and the cell index corresponding to the cell C may be an index 3 \8230, that is, the cell list may include an index 1, an index 2, and an index 3 \8230, that is, the cells that may be included in the cell list are the cell a corresponding to the index 1, the cell B corresponding to the index 2, and the cell C corresponding to the index 3, respectively, and which cell the terminal device needs to measure may be known through the cell indexes in the cell list. The present application does not limit the correspondence between the cell index and the cell identifier.

Alternatively, the terminal device may receive only the master information block in the system information, where the master information block includes the paging configuration frequency domain location information.

Optionally, the cell list may include a cell or a plurality of cells to be measured by the terminal device. For example, the cell list includes a cell in which the terminal device is currently located.

For example, the cell list may include a cell a, a cell B, and a cell C, and the number of cells in the cell list is not limited in the present application. For example, there may be a cell in which the terminal device is currently located in the cell a, the cell B, and the cell C, and the cell in which the terminal device is currently located may be the cell a. For another example, there may be a target cell that the terminal device needs to reselect in the cell a, the cell B, and the cell C, that is, a cell where the terminal device resides next.

Optionally, one or more cells in the cell list may be an identifier of one or more cells, or may be an 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 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 region may also be derived according to 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 according to 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 reselected target cell, the terminal device needs to measure one or more cells in the cell list or in the first area until the terminal device finds the reselected target cell that meets the requirement.

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

Optionally, the first information may further include a cell quality threshold of each cell in the cell list or a 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 value of the third cell.

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

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

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

Optionally, the terminal device may continuously measure the cells in the cell list or the cells in the first area until a certain cell meets the quality requirement of the cell, and the terminal device may determine the cell meeting the quality requirement as the target cell for the terminal device to reselect.

When the terminal equipment measures the reselected cell, the broadcast information does not need to be read frequently, and only the main information block needs to be received and the measurement is carried out according to the cells in the cell list or the cells in the first area, so that the power overhead caused by the frequent reading of the cell broadcast information by the terminal equipment is reduced.

The above-mentioned technical solution of embodiment 3 can also be combined with the technical solutions of embodiment 1 and/or embodiment 2, and 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 transmit location request information to the terminal device.

Optionally, in step S401, the first network device may further 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 triggering condition may be: the moving distance of the terminal equipment exceeds a second threshold value, and the second threshold value is a distance value.

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

Optionally, the second time trigger condition is: a 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 terminal device meets the second trigger condition.

In step S402, the terminal device transmits 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, the terminal device may report the location information of the terminal device to the first network device when the distance that the terminal device moves exceeds the second threshold.

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 switching 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, a first trigger condition.

Optionally, the first trigger condition may include a first distance trigger condition, where the first distance trigger condition is that the distance between the terminal device and the terminal device target cell edge is smaller than a second threshold value.

Optionally, the first trigger condition may also include a first time trigger condition, where the first time trigger condition is: in the second time, the terminal device may detect the target cell, or the first time trigger condition may be: and at the moment when the second time is reached, the terminal equipment initiates a switching request to the target cell.

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

Optionally, the handover configuration information may further include an identification of the third network device.

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

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

In step S407, the terminal device determines whether the terminal device satisfies a first trigger condition according to the location information of the third network device deployment cell and the location information of the terminal device; and under the condition that the terminal equipment meets the first trigger condition, the terminal equipment can randomly access the third network equipment.

The terminal equipment judges whether the first triggering condition of cell switching is met or not according to the position information of the third network equipment deployment cell and the position of the terminal equipment, and the terminal equipment does not need to report a cell measurement report to the first network equipment frequently, so that the signaling overhead is reduced.

Fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application, where the device 800 may include:

a processing unit 510 and a transceiving unit 520.

Optionally, the transceiver 520 is configured to receive first information from a first network device, where 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 information of a first cell; the first cell is different from a cell in which the terminal device currently resides; the processing unit 510 is configured to determine a target cell reselected by the communication apparatus 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 location information of the second network device, the identifier of the second network device, the cell deployment map of the deployment cell of the second network device, the physical cell identifier PCI of the second network device, or the public land mobile network PLMN.

Optionally, the processing unit 510 is configured to determine a target cell reselected by the communication apparatus according to the first information, and includes: the processing unit 510 is further specifically configured to: determining location information of the communication device; the processing unit 510 is further specifically configured to: and determining a target cell reselected by the communication device according to the first information and the position information of the communication device.

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

Optionally, the processing unit 510 is further specifically configured to: determining a target cell reselected by the communication device according to the first information and the position information of the communication device, comprising: the processing unit 510 is further specifically configured to determine whether a third cell meets a preset condition, where the preset condition is determined according to the location information of the communication apparatus, and the third cell is any cell of the second network device; the processing unit 510 is further specifically configured to determine the third cell as the target cell in case that the communication apparatus satisfies the preset condition.

Optionally, the processing unit 510 is further configured to determine whether the target cell and the cell where the communication device resides are consistent; in the case that the target cell and the terminal equipment camping cell are not consistent, the processing unit 510 is further specifically configured to reselect the communication apparatus from the camping cell to the target cell.

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

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

Optionally, the determining, by the processing unit 510, a target cell reselected by the terminal device according to the first information includes: the processing unit 510 is further specifically configured to: judging 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 processing unit 510 is further specifically configured to: and determining the first cell as a target cell reselected by the communication device.

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

Optionally, the first cell information further includes a first time, and the processing unit 510 is further configured to: in a first time, if the cell quality measurement value of the first cell does not exceed the cell quality threshold value of the first cell, the processing unit 510 is further specifically configured to: a second cell is measured, which may be any one of the cells.

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

Optionally, the transceiver 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 identification.

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 equipment and the edge of the target cell of the terminal equipment is less than a second threshold value; the first time trigger condition is: in the second time, the terminal device detects the target cell, or the first time trigger condition may be: and at the moment when the second time arrives, the terminal equipment initiates a switching request to the target cell.

Optionally, the handover configuration information may further include at least one of: an identity of the third network device, a PCI of the third network device to deploy the cell, a cell deployment map of the third network device, or location information of the third network device.

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

Optionally, the transceiver 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 apparatus 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 moving distance of the terminal equipment exceeds a second threshold value; the second time trigger condition is: a first period value.

Optionally, the transceiver unit 520 is further configured to send the location information of the terminal device to the first network device, where the sending includes: the transceiver 520 is further configured to send location information of the communication apparatus to the first network device when the communication apparatus satisfies the second trigger condition.

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

The communication device 500 provided in the present application may correspond to the processes performed by the terminal device in the method embodiments of fig. 3 to fig. 4, and the functions of the processing unit and the transceiving unit in the communication device may refer to the description above, and detailed descriptions are appropriately omitted here.

Fig. 5 is a schematic structural diagram of another communication device according to an embodiment of the present application.

Optionally, the processing unit 510: the first information is used for generating first information, the first information comprises first time information and information of second network equipment corresponding to the first time information or the first information comprises information of a first cell; the first cell is different from a cell in which the terminal device currently resides; the transceiver unit 520: the method comprises the step of sending first information to the terminal equipment so that the terminal equipment can determine a target cell reselected by the terminal equipment according to the first information.

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

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 information of the second network device is further used for instructing the terminal device to determine a target cell reselected by the terminal device according to the information of the second network device and the location information of the terminal device.

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

Optionally, the processing unit 510 is further configured to determine whether the target cell is consistent with the camped cell of the communication apparatus; the processing unit 510 is further configured to reselect to the target cell from the camped cell in case the target cell and the camped cell of the communication device do not coincide.

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

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

Optionally, the first cell information is used to instruct the terminal device to determine whether a cell quality measurement value of the first cell exceeds a 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 first cell information is further used for instructing the terminal device to determine that the first cell is a target cell for the terminal device to reselect.

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

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

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

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, a first trigger condition.

Optionally, the first trigger condition includes a first distance trigger condition or a first time trigger condition, where the first distance trigger condition is: the distance between the terminal equipment and the edge of the target cell of the terminal equipment is smaller than a second threshold value; the first time trigger condition is: in the second time, the terminal device detects the target cell, or the first time trigger condition may be: and at the moment when the second time is reached, the terminal equipment initiates a switching request to the target cell.

Optionally, the handover configuration information may further include at least one of: the identifier of the third network device, the PCI of the third network device to deploy the cell, the cell deployment map 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 further configured to receive location information sent by the terminal device; the processing unit 510 is further configured to determine whether the communication apparatus performs cell handover according to the location information of the communication apparatus.

Optionally, the transceiver unit 520 is further configured to receive the location information sent by the terminal device, where the location information includes: the transceiving unit 520 is further configured to receive the location information sent by the terminal device, if the terminal device satisfies the second trigger condition. Optionally, the transceiver 520 is further configured to send a handover request message to a 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 processes performed by the network device in the method embodiments of fig. 3 to fig. 4, and the functions of the processing unit and the transceiving unit in the communication device may refer to the description above, and detailed descriptions are appropriately omitted here.

An embodiment of the present application further provides a communication apparatus, including a processor. The processor is coupled to the memory and is operable to execute instructions in the memory to implement the methods of the method embodiments of fig. 3-4 described above. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface.

An embodiment of the present application further provides a communication apparatus, including a processor. The processor is coupled to the memory and is configured to execute the instructions in the memory to implement the methods of the embodiments of the methods of fig. 3-4. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface.

An embodiment of the present application further provides a processor, including: input circuit, output circuit and 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 performs the method in the method embodiments of fig. 3 to 4.

In a specific implementation process, the 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, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter, and the input circuit and the output circuit may be the same circuit that functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the present application does not limit the specific implementation manner of the processor and various circuits.

An embodiment of the present application further provides a processing apparatus, which includes a processor and a memory. The processor is configured to read instructions stored in the memory, and to receive signals via the receiver and transmit signals via the transmitter to perform the methods of the method embodiments of fig. 3-4.

It will be appreciated that the associated data interaction process, e.g., sending the indication information, may be a process of outputting the indication information from the processor, and receiving the capability information may be a process of receiving the input capability information from the processor. In particular, the data output by the processor may be output to the transmitter and the input data received by the processor may be from the receiver. The transmitter and receiver may be collectively referred to as a transceiver, among others.

The processing means may be a chip. The processor may be implemented by hardware or software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated with the processor, located external to the processor, or stand-alone.

An embodiment of the present application further provides a computer program product, where the computer program product includes: a computer program (also referred to as code, or instructions), which when executed, causes a computer to perform the method of the method embodiments of fig. 3-4 described above.

Embodiments of the present application also provide a computer-readable medium storing a computer program (which may also be referred to as code or instructions) which, when executed on a computer, causes the computer to perform the method in the method embodiments of fig. 3 to 4.

The embodiment of the present application further provides a communication system, which includes the foregoing network device and terminal device.

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

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

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a portable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of cell reselection, comprising:

the method comprises the steps that a terminal device receives first information from a first network device, wherein the first information comprises first time information and information of the first network device corresponding to the first time information, and the information of the first network device comprises a cell deployment diagram of the first network device; the terminal equipment is in an idle state or an inactive state;

and the terminal equipment determines a reselected target cell according to the position information of the terminal equipment and the cell deployment map, wherein the cell deployment map is the position of each cell in the projection of the coverage area of the first network equipment on the ground.

2. The method of claim 1, wherein the information of the first network device further comprises at least one of: location information of a second network device, a physical cell identity, PCI, of a deployed cell of the second network device, or a public land mobile network, PLMN.

3. The method according to claim 1 or 2, wherein when the terminal device determines a reselected target cell according to the location information of the terminal device and the cell deployment map, the method comprises:

the terminal equipment determines the position information of the terminal equipment;

the terminal equipment determines a first cell set according to the first information and the position information of the terminal equipment;

the terminal equipment measures cells in the first cell set;

and the terminal equipment determines a target cell reselected by the terminal equipment according to the measurement result of the measurement of the cells in the first cell set.

4. The method according to claim 1 or 2, wherein the information of the first network device further comprises information of a first cell, the first cell being different from a cell in which the terminal device currently resides.

5. The method of claim 4, wherein the information of the first cell comprises at least one of: the first cell identifier, the first cell frequency point, and the cell quality threshold of the first cell.

6. The method of claim 4, wherein the terminal device measures only the first cell.

7. The method of claim 4, wherein the determining, by the terminal device, whether to reselect the target cell according to the location information of the terminal device and the cell deployment map comprises:

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

and if the cell quality measurement value of the first cell exceeds the cell quality threshold value of the first cell, the terminal equipment determines that the first cell is a target cell reselected by the terminal equipment.

8. The method of claim 4, wherein the first cell information further comprises a first time, the method further comprising:

and in a first time, if the cell quality measurement value of the first cell does not exceed the cell quality threshold value of the first cell, the terminal equipment measures a second cell.

9. The method according to claim 2, wherein the first information further includes a cell list, the cell list includes a cell in which the terminal device is currently located and the reselected target cell, paging configuration time domain location information of each cell in the cell list is the same, the terminal device receives only a master information block in system information from the second network device, and the master information block includes paging configuration frequency domain location information.

10. A method of cell reselection, comprising:

a first network device generates first information and sends the first information to a terminal device, wherein the first information comprises first time information and information of the first network device corresponding to the first time information, and the information of the first network device comprises a cell deployment diagram of the first network device;

the terminal equipment determines a reselected target cell according to the position information of the terminal equipment and the cell deployment map, wherein the cell deployment map is the position of each cell in the projection of the coverage area of the first network equipment on the ground; the terminal equipment is in an idle state or an inactive state.

11. The method of claim 10, wherein the information of the first network device further comprises at least one of: the location information of the second network device, the Physical Cell Identity (PCI) of the deployment cell of the second network device, or the Public Land Mobile Network (PLMN).

12. The method according to claim 10 or 11, wherein the information of the first network device further comprises information of a first cell, and the first cell is different from a cell in which the terminal device currently resides.

13. The method of claim 12, wherein the information of the first cell comprises at least one of: the first cell identifier, the first cell frequency point, and the cell quality threshold of the first cell.

14. The method of claim 12, wherein the first cell is a cell measured only by the terminal device.

15. The method of claim 12, 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 value of the first cell, the first cell information is further used for indicating the terminal device to determine that the first cell is a target cell reselected by the terminal device.

16. The method of claim 12, wherein the first cell information further includes a first time, and wherein the first cell information is further used to indicate that the terminal device measures a second cell during the first time if the cell quality measurement of the first cell does not exceed the cell quality threshold of the first cell.

17. The method of claim 11, wherein the first information further includes a cell list, the cell list includes a cell where the terminal device is currently located and the reselected target cell, paging configuration time domain location information of each cell in the cell list is the same, and the terminal device receives only a master information block in system information from the second network device, where the master information block includes paging configuration frequency domain location information.

18. A communication apparatus, characterized in that it comprises various modules or units for carrying out the method according to any one of claims 1 to 17.

19. A storage medium having stored thereon a computer program or instructions, which when executed cause a computer to perform the method of any one of claims 1 to 17.

20. A chip system, comprising: a processor for performing the method of any one of claims 1 to 17.

21. A communication system, characterized in that it comprises communication means for carrying out the method according to any one of claims 1 to 9 and/or communication means for carrying out the method according to any one of claims 10 to 17.