Communication method and communication device

Abstract

Provided in the present application are a communication method and a communication device, the communication method comprising: a network device determining first configuration information, the first configuration information being used after a terminal device resides in a target cell through a cell reselection process and before a system message block SIB1 message of the target cell is searched, configuring a configuration parameter of paging and / or random access of the terminal device in the target cell; the network device sends the first configuration information to the terminal device; and after the terminal device resides in the target cell through a cell reselection process and before a system message block SIB1 message of the target cell is searched, the terminal device receives paging of the terminal device in the target cell and / or initiates random access of the terminal device in the target cell according to the first configuration information. According to the method provided by the embodiment of the invention, the user service experience when the terminal equipment performs cell reselection can be improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communications, and specifically to a communication method and a communication device. Background Art

[0002] During the cell reselection process, after the terminal device resides in a cell, as the terminal device moves or the satellite moves in the NTN scenario, the terminal device may need to switch to another cell with higher priority or better signal to reside. At present, after the terminal device triggers the cell reselection conditions, it will detect the synchronization signal and PBCH block (SSB) message of the neighboring cell, and then detect the system information block 1 (SIB1) message of the neighboring cell and find the target cell and reside in it according to the cell reselection rules. "Neighboring cell" refers to the cell adjacent to the source cell currently accessed by the terminal device.

[0003] However, at present, in the process of reselecting the target cell to be camped on or detecting the SIB1 message in the above-mentioned cell reselection, there is a problem of poor user service experience of the terminal equipment. Summary of the invention

[0004] The present application provides a communication method and a communication device, which can improve the user service experience when a terminal device performs cell reselection.

[0005] In a first aspect, a communication method is provided, which is applied to a terminal device. For example, the method can be executed by the terminal device, or it can also be executed by a module (such as a chip or circuit) in the terminal device, or it can also be executed by a logical node, logical module or software that can implement all or part of the functions of the terminal device. This application is not limited to this.

[0006] The method includes: receiving first configuration information sent by a network device, the first configuration information being used to configure configuration parameters of paging and / or random access of the terminal device in a destination cell, the destination cell being an adjacent cell of a source cell in which the terminal device is currently residing; after residing in the destination cell through a cell reselection process and before searching for a system message block SIB1 message of the destination cell, receiving paging of the terminal device in the destination cell and / or initiating random access of the terminal device in the destination cell according to the first configuration information.

[0007] It should be understood that in the cell reselection process of the first aspect, after the terminal device detects the SSB message of the neighboring cell, it can determine the destination cell of the cell reselection process according to the detection result of the SSB message of the neighboring cell, that is, the destination cell is the most suitable cell selected by the terminal device from multiple neighboring cells. Then, after the terminal device resides in the destination cell, it searches for the SIB1 message of the destination cell. In this way, the terminal device only needs to use one cycle to measure the SIB1 message of a destination cell, or in other words, the number of SIB1s that need to be searched during the cell reselection process is small, thereby reducing the power consumption overhead of the terminal device and reducing the search cycle of the SIB1 message.

[0008] However, during the period after the terminal device resides in the target cell and before searching for the SIB1 message of the target cell, the terminal device does not have the paging and access parameter configuration of the target cell, and thus cannot accept paging or initiate access. In other words, before the terminal device resides in the target cell, the paging or access parameter configuration of the source cell can be used; after the terminal device searches for the SIB1 message of the target cell, the paging or access parameter configuration of the target cell in the SIB1 message can be used; but in the period in between, the terminal device has no available paging and access parameter configuration.

[0009] Therefore, specifically, in the communication method shown in the first aspect, during the time period after the terminal device resides in the target cell and before searching for the SIB1 message of the target cell, the configuration information of the paging and / or random access within the time period can be determined according to the first configuration information sent by the network device, and the paging of the terminal device in the target cell can be received and / or random access of the terminal device in the target cell can be initiated within the time period.

[0010] The first configuration information may be indication information indicating determination of paging and access parameter configuration, or may be configuration parameters related to a paging process and / or a random access process. For example, the paging configuration parameters may include a paging cycle, a paging channel configuration, etc., and the random access configuration parameters may include a time-frequency resource location of a random access occasion (RACH occasion, RO), a root sequence number of a preamble, etc.

[0011] Optionally, the above-mentioned random access configuration parameters may also include two-step random access configuration parameters or dedicated random access configuration parameters. For example, the two-step random access configuration parameters may include a physical random access channel (PRACH) type, etc., and the dedicated random access configuration parameters may include the number of non-dedicated random access preambles or the configuration of a preamble group, etc.

[0012] Through the above method, the terminal device can receive paging or initiate access in the time period after the terminal device resides in the target cell and before searching for the SIB1 message of the target cell. In this way, when the user uses the terminal device, there will be no problem of being unable to receive paging or initiate access in some time periods due to the cell reselection of the terminal device, thereby improving the user service experience of the terminal device.

[0013] In combination with the first aspect, in certain implementations of the first aspect, the first configuration information includes indication information for indicating whether the configuration parameters of the paging and / or the configuration parameters of the random access of the destination cell are the same as those of the source cell; when the configuration parameters of the paging process and / or the configuration parameters of the random access process of the destination cell and the source cell are the same, receiving the paging of the terminal device in the destination cell and / or initiating random access of the terminal device in the destination cell according to the first configuration information, including: receiving the paging of the terminal device in the destination cell and / or initiating random access of the terminal device in the destination cell according to the configuration parameters of the paging process and / or the configuration parameters of the random access process of the source cell.

[0014] It should be understood that the value of the indication information in the first configuration information can be true or false. The value is true, which means that the paging configuration parameters and / or random access configuration parameters of the destination cell and the source cell are the same, and the value is false, which means that the paging configuration parameters and / or random access configuration parameters of the destination cell and the source cell are different. In this way, when the value of the indication information is true, the terminal device can continue to use the paging configuration parameters and / or random access configuration parameters of the source cell within the above time period.

[0015] Specifically, during the process of cell reselection of the terminal device, if the indication information related to the paging process and the indication information related to the random access process in the first configuration information are both true, the terminal device can receive paging or initiate random access within the above-mentioned time period; if the indication information related to the paging process in the first configuration information is true and the indication information related to the random access process is false, the terminal device can only receive paging but cannot initiate random access within the above-mentioned time period; similarly, if the indication information related to the paging process in the first configuration information is false and the indication information related to the random access process is true, the terminal device can only initiate random access but cannot receive paging within the above-mentioned time period.

[0016] In combination with the first aspect, in certain implementations of the first aspect, the first configuration information includes different paging configuration parameters and / or different random access configuration parameters for the destination cell and the source cell; receiving paging of the terminal device in the destination cell and / or initiating random access of the terminal device in the destination cell according to the first configuration information, including: receiving paging of the terminal device in the destination cell and / or initiating random access of the terminal device in the destination cell according to the first configuration information of the destination cell and other paging configuration parameters and / or other random access configuration parameters of the source cell except the configuration parameters included in the first configuration information.

[0017] Specifically, the first configuration information may be configuration parameters related to the paging process and / or the random access process, or in other words, the terminal device receives configuration parameters related to the paging process and / or the random access process from the network device. The first configuration information may include different parameters for the source cell and the destination cell. For example, if the paging cycles of the source cell and the destination cell are the same but the paging channel configurations are different, the first configuration information received by the terminal device may only include the paging channel configuration, and the terminal device may assume that the paging cycle is the same as that of the source cell during the above time period. In this way, the length of the content included in the first configuration information can be reduced, thereby increasing the transmission rate and improving data stability.

[0018] In combination with the first aspect, in certain implementations of the first aspect, the first configuration information includes paging configuration parameters and / or random access configuration parameters of the target cell.

[0019] In combination with the first aspect, in certain implementations of the first aspect, receiving first configuration information sent by a network device includes: receiving neighbor list information sent by the network device, the neighbor list information including neighbor information of multiple cells, the neighbor information of each cell in the multiple cells including configuration parameters for configuring paging of the terminal device in each cell and / or configuration parameters for random access, and the multiple cells include the destination cell.

[0020] Specifically, the first configuration information may be included in the neighbor list information, for example, the configuration information of paging and / or random access of each cell in the first configuration information may be set in the neighbor information of each cell in the neighbor list information. The network device may send the first configuration information by sending the neighbor list information to the terminal device.

[0021] In combination with the first aspect, in certain implementations of the first aspect, the first configuration information is set in a parameter list of any one of the following neighboring cell information: NTN-NeighCellConfig-r17 in the SIB19 message of the destination cell, IntraFreqNeighCellInfo in the SIB3 message of the destination cell, and InterFreqNeighCellInfo in the SIB4 message of the destination cell.

[0022] In combination with the first aspect, in certain implementations of the first aspect, receiving the neighbor list information sent by the network device includes: receiving the neighbor information of the multiple cells through one downlink beam; or, receiving the neighbor information of the multiple cells through multiple downlink beams, each of the multiple downlink beams notifying the neighbor information of at least one cell among the multiple cells.

[0023] Optionally, when the terminal receives neighboring cell information of multiple cells through multiple downlink beams, the neighboring cell information of different neighboring cells may be related to information such as the position of the downlink beam, or in other words, the correspondence between the downlink beam and different cells may be determined by the position of the downlink beam.

[0024] In combination with the first aspect, in certain implementations of the first aspect, the method is applied to non-terrestrial networks (NTN) scenarios, such as transparent forwarding scenarios and / or regeneration mode scenarios of satellite communications.

[0025] Specifically, the cell reselection process may be triggered by the movement of the satellite in the NTN scenario. In the transparent forwarding scenario of satellite communication, the satellite only plays the role of frequency conversion forwarding; in the regeneration mode scenario of satellite communication, the satellite may contain network equipment such as base stations or distribution units.

[0026] In a second aspect, a communication method is provided, which is applied to a terminal device. For example, the method can be executed by the terminal device, or it can also be executed by a module (such as a chip or circuit) in the terminal device, or it can also be executed by a logical node, logical module or software that can implement all or part of the functions of the terminal device. This application does not limit this.

[0027] The method includes: receiving second configuration information sent by a network device, the second configuration information being used to indicate that the terminal device needs to search N cells for SIB1 messages when performing cell reselection; and searching, according to the second configuration information, for SIB1 messages of the N cells from K cells adjacent to a source cell in which the terminal device is currently residing, where N is a positive integer and K is a positive integer greater than N.

[0028] It should be understood that in the cell reselection process of the second aspect, the terminal device measures the SSB message of the neighboring cell after the conditions for triggering the cell reselection are met, and at the same time measures the SIB1 message of the neighboring cell, and then finds the target cell and resides in it according to the cell reselection rules. In the above cell reselection process, when the number of neighboring cells is large, the power consumption overhead of the terminal device is large and the search cycle of the SIB1 message is long, which reduces the user experience of the terminal device.

[0029] Specifically, in the communication method shown in the second aspect, the second configuration information indicates some neighboring cells among the multiple neighboring cells, and the above-mentioned some neighboring cells need to search for SIB1 messages. In other words, the second configuration information includes the neighboring cells that have been screened out and need to search for SIB1 messages, and then the terminal device only needs to search for SIB1 messages of the neighboring cells indicated in the second configuration information, and does not need to search for SIB1 messages of all neighboring cells.

[0030] Through the above method, during the cell reselection process, the number of SIB1 messages that the terminal device needs to search is reduced, thereby reducing the power consumption overhead of the terminal device and reducing the period of searching for SIB1 messages, thereby improving the user service experience when the terminal device performs cell reselection.

[0031] In combination with the second aspect, in some implementations of the second aspect, the second configuration information is determined according to a priori information, where the a priori information is used to indicate a probability that each of the K cells needs to be searched for SIB1 messages.

[0032] In combination with the second aspect, in certain implementations of the second aspect, the prior information is determined based on the orbit of the satellite corresponding to each of the K cells and the orbit of the satellite corresponding to the source cell, or based on the distance between the satellite corresponding to each of the K cells and the satellite corresponding to the source cell.

[0033] In combination with the second aspect, in certain implementations of the second aspect, receiving the second configuration information sent by the network device includes: receiving neighbor list information sent by the network device, the neighbor list information including the neighbor information of the K cells, and the neighbor information of the N cells including indication information for indicating the need to search for SIB1 messages.

[0034] Specifically, the second configuration information may be included in the neighbor cell list information. For example, a new indication parameter may be added to the neighbor cell list information to indicate whether each of the K cells needs to be searched for SIB1 messages. For example, if the value of the indication parameter of a cell is true, the cell needs to be searched for SIB1 messages. Alternatively, a new cell list or configuration file may be added to the neighbor cell list information to display only the cells that need to be searched for SIB1 messages.

[0035] In combination with the second aspect, in certain implementations of the second aspect, the method is applied to non-terrestrial networks (NTN) scenarios, particularly transparent forwarding scenarios and / or regeneration mode scenarios of satellite communications.

[0036] In combination with the second aspect, in certain implementations of the second aspect, the second configuration information is set in a parameter list of any one of the following neighboring cell information: NTN-NeighCellConfig-r17 in SIB19 information, IntraFreqNeighCellInfo in SIB3 information, and InterFreqNeighCellInfo in SIB4 information.

[0037] On the third aspect, a communication method is provided, which is applied to a network device. The method can be executed by the network device, or by a module (such as a chip or circuit) in the network device, or by a logical node, logical module or software that can implement all or part of the functions of the network device. This application does not limit this.

[0038] The method includes: determining first configuration information, the first configuration information being used to configure the configuration parameters of the terminal device's paging and / or random access in the target cell after the terminal device resides in the target cell through a cell reselection process and before searching for a system message block SIB1 message of the target cell, wherein the target cell is an adjacent cell of a source cell in which the terminal device is currently residing; and sending the first configuration information to the terminal device.

[0039] Through the above method, after the network device sends the first configuration information to the terminal device, the terminal device can receive paging or initiate access in the time period after the terminal device resides in the target cell and before searching for the SIB1 message of the target cell. In this way, when the user uses the terminal device, there will be no problem of being unable to receive paging or initiate access in some time periods due to the cell reselection of the terminal device, thereby improving the user service experience of the terminal device.

[0040] In combination with the third aspect, in certain implementations of the third aspect, the first configuration information includes indication information for indicating whether paging configuration parameters and / or random access configuration parameters of the destination cell and the source cell are the same.

[0041] In combination with the third aspect, in certain implementations of the third aspect, the first configuration information includes different paging configuration parameters and / or different random access configuration parameters of the destination cell and the source cell.

[0042] In combination with the third aspect, in certain implementations of the third aspect, the first configuration information includes paging configuration parameters and / or random access configuration parameters of the target cell.

[0043] In combination with the third aspect, in certain implementations of the third aspect, sending the first configuration information to the terminal device includes: sending neighbor cell list information to the terminal device, the neighbor cell list information including neighbor cell information of multiple cells, the neighbor cell information of each cell in the multiple cells including configuration parameters for configuring paging of the terminal device in each cell and / or configuration parameters for random access, and the multiple cells include the destination cell.

[0044] In combination with the third aspect, in certain implementations of the third aspect, the first configuration information is set in a parameter list of any one of the following neighboring cell information: NTN-NeighCellConfig-r17 in the SIB19 message of the destination cell, IntraFreqNeighCellInfo in the SIB3 message of the destination cell, and InterFreqNeighCellInfo in the SIB4 message of the destination cell.

[0045] In combination with the third aspect, in certain implementations of the third aspect, the method is applied to non-terrestrial networks (NTN) scenarios, particularly transparent forwarding scenarios and / or regeneration mode scenarios of satellite communications.

[0046] In combination with the third aspect, in certain implementations of the third aspect, sending the neighbor list information to the terminal device includes: sending the neighbor list information to the terminal device through a downlink beam; or, sending the neighbor list information to the terminal device through multiple downlink beams, each of the multiple downlink beams notifying the neighbor information of at least one cell among the multiple cells.

[0047] The communication method provided in the third aspect is a step on the network device side corresponding to the communication method shown in the first aspect. Therefore, the explanation of the relevant contents and beneficial effects of the communication method provided in the third aspect can refer to the communication method shown in the first aspect and will not be repeated here.

[0048] In a fourth aspect, a communication method is provided, which is applied to a network device. The method can be executed by the network device, or by a module (such as a chip or circuit) in the network device, or by a logical node, logical module or software that can implement all or part of the functions of the network device. This application does not limit this.

[0049] The method includes: determining second configuration information, the second configuration information being used to indicate, when a terminal device performs cell reselection, N cells among K cells adjacent to a source cell where the terminal device is currently located that need to search for SIB1 messages, where N is a positive integer and K is a positive integer greater than N; and sending the second configuration information to the terminal device.

[0050] Through the above method, after the network device sends the second configuration information to the terminal device, the number of SIB1 messages that the terminal device needs to search for during cell reselection is reduced, thereby reducing the power consumption overhead of the terminal device and shortening the period of searching for SIB1 messages.

[0051] In combination with the fourth aspect, in certain implementations of the fourth aspect, determining the second configuration information includes: determining the second configuration information based on a priori information, where the a priori information is used to indicate the probability that each of the K cells needs to be searched for SIB1 messages.

[0052] Specifically, the prior information may be the ranking of the probabilities of the K cells needing to be searched for SIB1 messages, or the specific values ​​of the probabilities of the K cells indicated by the network device. Optionally, the network device may, according to a preset probability threshold, arrange the cells whose probabilities of needing to be searched for SIB1 messages are higher than the probability threshold in the second configuration information.

[0053] In combination with the fourth aspect, in certain implementations of the fourth aspect, before determining the second configuration information, the method also includes: determining the prior information based on the orbit of the satellite corresponding to each of the K cells and the orbit of the satellite corresponding to the source cell, or the distance between the satellite corresponding to each of the K cells and the satellite corresponding to the source cell.

[0054] For example, if the distance between the satellite corresponding to the neighboring cell and the satellite corresponding to the source cell is relatively close, the network device can determine that the probability that the neighboring cell needs to be detected for SIB1 messages is relatively high, otherwise, the probability that the neighboring cell needs to be detected for SIB1 messages is relatively low. For another example, the network device can determine the probability that the neighboring cell needs to be detected for SIB1 messages based on the distance between the orbit of the satellite corresponding to the neighboring cell and the orbit of the satellite corresponding to the source cell.

[0055] In combination with the fourth aspect, in certain implementations of the fourth aspect, sending the second configuration information to the terminal device includes: sending neighbor cell list information to the terminal device, the neighbor cell list information including the neighbor cell information of the K cells, and the neighbor cell information of the N cells including indication information for indicating the need to search for SIB1 messages.

[0056] In combination with the fourth aspect, in certain implementations of the fourth aspect, the second configuration information is set in a parameter list of any one of the following neighboring cell information: NTN-NeighCellConfig-r17 in SIB19 information, IntraFreqNeighCellInfo in SIB3 information, and InterFreqNeighCellInfo in SIB4 information.

[0057] In combination with the fourth aspect, in certain implementations of the fourth aspect, the method is applied to non-terrestrial networks (NTN) scenarios, particularly transparent forwarding scenarios and / or regeneration mode scenarios of satellite communications.

[0058] The communication method provided in the fourth aspect is a step on the network device side corresponding to the communication method shown in the second aspect. Therefore, the explanation and beneficial effects of the relevant contents of the communication method provided in the fourth aspect can refer to the communication method shown in the second aspect and will not be repeated here.

[0059] In a fifth aspect, a communication device is provided, which includes: a transceiver unit for receiving first configuration information sent by a network device, the first configuration information being used to configure configuration parameters for paging and / or random access of the terminal device in a destination cell, the destination cell being an adjacent cell of a source cell in which the terminal device is currently located; a processing unit for receiving paging of the terminal device in the destination cell and / or initiating random access of the terminal device in the destination cell according to the first configuration information after the terminal device resides in the destination cell through a cell reselection process and before searching for a system message block SIB1 message of the destination cell.

[0060] In combination with the fifth aspect, in certain implementations of the fifth aspect, the first configuration information includes indication information for indicating whether the paging configuration parameters and / or random access configuration parameters of the destination cell are the same as those of the source cell; when the configuration parameters of the paging process and / or the configuration parameters of the random access process of the destination cell are the same as those of the source cell, the processing unit is specifically used to: receive the paging of the terminal device in the destination cell and / or initiate random access of the terminal device in the destination cell according to the configuration parameters of the paging process and / or the configuration parameters of the random access process of the source cell.

[0061] In combination with the fifth aspect, in certain implementations of the fifth aspect, the first configuration information includes different paging configuration parameters and / or different random access configuration parameters for the destination cell and the source cell; the processing unit is specifically used to: receive paging of the terminal device in the destination cell and / or initiate random access of the terminal device in the destination cell according to the first configuration information of the destination cell and other paging configuration parameters and / or other random access configuration parameters of the source cell except the configuration parameters included in the first configuration information.

[0062] In combination with the fifth aspect, in certain implementations of the fifth aspect, the first configuration information includes paging configuration parameters and / or random access configuration parameters of the target cell.

[0063] In combination with the fifth aspect, in certain implementations of the fifth aspect, the above-mentioned transceiver unit is specifically used to receive neighbor cell list information sent by the network device, the neighbor cell list information includes neighbor cell information of multiple cells, the neighbor cell information of each cell in the multiple cells includes configuration parameters for configuring paging of the terminal device in each cell and / or configuration parameters for random access, and the multiple cells include the destination cell.

[0064] In combination with the fifth aspect, in certain implementations of the fifth aspect, the device is applied to non-terrestrial networks (NTN) scenarios, particularly transparent forwarding scenarios and / or regeneration mode scenarios of satellite communications.

[0065] In combination with the fifth aspect, in certain implementations of the fifth aspect, the above-mentioned transceiver unit is specifically used to receive the neighboring cell information of the multiple cells through one downlink beam; or, to receive the neighboring cell information of the multiple cells through multiple downlink beams, and each of the multiple downlink beams notifies the neighboring cell information of at least one cell among the multiple cells.

[0066] The explanation and beneficial effects of the communication device-related contents provided in the fifth aspect may refer to the communication method shown in the first aspect and will not be repeated here.

[0067] In a sixth aspect, a communication device is provided, comprising: a transceiver unit for receiving second configuration information sent by a network device, the second configuration information being used to indicate that the terminal device needs to search N cells for SIB1 messages when performing cell reselection; a processing unit for searching, according to the second configuration information, for SIB1 messages of the N cells from K cells adjacent to a source cell in which the terminal device is currently located, wherein N is a positive integer and K is a positive integer greater than N.

[0068] In combination with the sixth aspect, in certain implementations of the sixth aspect, the second configuration information is determined based on a priori information, where the a priori information is used to indicate a probability that each of the K cells needs to be searched for SIB1 messages.

[0069] In combination with the sixth aspect, in certain implementations of the sixth aspect, the prior information is determined based on the orbit of the satellite corresponding to each of the K cells and the orbit of the satellite corresponding to the source cell, or based on the distance between the satellite corresponding to each of the K cells and the satellite corresponding to the source cell.

[0070] In combination with the sixth aspect, in certain implementations of the sixth aspect, the transceiver unit is specifically used to receive neighbor cell list information sent by the network device, the neighbor cell list information includes the neighbor cell information of the K cells, and the neighbor cell information of the N cells includes indication information for indicating the need to search for SIB1 messages.

[0071] In combination with the sixth aspect, in certain implementations of the sixth aspect, the device is applied to non-terrestrial networks (NTN) scenarios, particularly transparent forwarding scenarios and / or regeneration mode scenarios of satellite communications.

[0072] In combination with the sixth aspect, in certain implementations of the sixth aspect, the second configuration information is set in a parameter list of any one of the following neighboring cell information: NTN-NeighCellConfig-r17 in SIB19 information, IntraFreqNeighCellInfo in SIB3 information, and InterFreqNeighCellInfo in SIB4 information.

[0073] The explanation and beneficial effects of the communication device-related contents provided in the sixth aspect may refer to the paging method shown in the second aspect and will not be repeated here.

[0074] In the seventh aspect, a communication device is provided, which includes: a processing unit, used to determine first configuration information, wherein the first configuration information is used to configure the configuration parameters of the paging and / or random access of the terminal device in the target cell after the terminal device resides in the target cell through a cell reselection process and before searching for the system message block SIB1 message of the target cell, and the target cell is an adjacent cell of the source cell where the terminal device is currently residing; and a transceiver unit, used to send the first configuration information to the terminal device.

[0075] In combination with the seventh aspect, in certain implementations of the seventh aspect, the first configuration information includes indication information for indicating whether the paging configuration parameters and / or random access configuration parameters of the destination cell are the same as those of the source cell.

[0076] In combination with the seventh aspect, in certain implementations of the seventh aspect, the first configuration information includes different paging configuration parameters and / or different random access configuration parameters of the destination cell and the source cell.

[0077] In combination with the seventh aspect, in certain implementations of the seventh aspect, the first configuration information includes paging configuration parameters and / or random access configuration parameters of the target cell.

[0078] In combination with the seventh aspect, in certain implementations of the seventh aspect, the transceiver unit is specifically used to: send neighbor list information to the terminal device, the neighbor list information including neighbor information of multiple cells, the neighbor information of each cell in the multiple cells including configuration parameters for configuring paging of the terminal device in each cell and / or configuration parameters for random access, and the multiple cells include the destination cell.

[0079] In combination with the seventh aspect, in certain implementations of the seventh aspect, the first configuration information is set in a parameter list of any one of the following neighboring cell information: NTN-NeighCellConfig-r17 in the SIB19 message of the destination cell, IntraFreqNeighCellInfo in the SIB3 message of the destination cell, and InterFreqNeighCellInfo in the SIB4 message of the destination cell.

[0080] In combination with the seventh aspect, in certain implementations of the seventh aspect, the device is applied to non-terrestrial networks (NTN) scenarios, particularly transparent forwarding scenarios and / or regeneration mode scenarios of satellite communications.

[0081] In combination with the seventh aspect, in certain implementations of the seventh aspect, the transceiver unit is specifically used to: send neighbor list information to the terminal device through a downlink beam; or, send neighbor list information to the terminal device through multiple downlink beams, each of the multiple downlink beams notifying the neighbor information of at least one cell among the multiple cells.

[0082] The explanation and beneficial effects of the communication device-related contents provided in the seventh aspect can all be referred to the paging method shown in the third aspect, and will not be repeated here.

[0083] In an eighth aspect, a communication device is provided, comprising: a processing unit, used to determine second configuration information, wherein the second configuration information is used to indicate, when a terminal device performs cell reselection, N cells among K cells adjacent to a source cell in which the terminal device is currently located that need to search for SIB1 messages, wherein N is a positive integer and K is a positive integer greater than N; and a transceiver unit, used to send the second configuration information to the terminal device.

[0084] In combination with the eighth aspect, in certain implementations of the eighth aspect, the processing unit is specifically used to: determine the second configuration information based on prior information, where the prior information is used to indicate the probability that each of the K cells needs to be searched for SIB1 messages.

[0085] In combination with the eighth aspect, in certain implementations of the eighth aspect, before the above-mentioned processing module determines the second configuration information, the processing module is also used to: determine the prior information based on the orbit of the satellite corresponding to each cell in the K cells and the orbit of the satellite corresponding to the source cell, or the distance between the satellite corresponding to each cell in the K cells and the satellite corresponding to the source cell.

[0086] In combination with the eighth aspect, in certain implementations of the eighth aspect, the above-mentioned transceiver unit is specifically used to: send neighbor cell list information to the terminal device, the neighbor cell list information includes the neighbor cell information of the K cells, and the neighbor cell information of the N cells includes indication information for indicating the need to search for SIB1 messages.

[0087] In combination with the eighth aspect, in certain implementations of the eighth aspect, the second configuration information is set in a parameter list of any one of the following neighboring cell information: NTN-NeighCellConfig-r17 in SIB19 information, IntraFreqNeighCellInfo in SIB3 information, and InterFreqNeighCellInfo in SIB4 information.

[0088] In combination with the eighth aspect, in certain implementations of the eighth aspect, the device is applied to non-terrestrial networks (NTN) scenarios, particularly transparent forwarding scenarios and / or regeneration mode scenarios of satellite communications.

[0089] The explanation and beneficial effects of the paging device related contents provided in the eighth aspect can refer to the paging method shown in the fourth aspect, and will not be repeated here.

[0090] In a ninth aspect, a communication device is provided, comprising a processor, wherein the processor is used to, by executing a computer program or instruction or through a logic circuit, enable the communication device to perform the method described in the first aspect and any possibility of the first aspect; or enable the communication device to perform the method described in the second aspect and any possibility of the second aspect; enable the communication device to perform the method described in the third aspect and any possibility of the third aspect; or enable the communication device to perform the method described in the fourth aspect and any possibility of the fourth aspect.

[0091] In a possible implementation, the communication device further includes a memory for storing the computer program or instruction.

[0092] In a possible implementation manner, the communication device further includes a communication interface, which is used to input and / or output signals.

[0093] In the tenth aspect, a communication device is provided, comprising a logic circuit and an input / output interface, the input / output interface being used to input and / or output signals, the logic circuit being used to execute the method described in the first aspect and any possibility of the first aspect; or, the logic circuit being used to execute the method described in the second aspect and any possibility of the second aspect; the logic circuit being used to execute the method described in the third aspect and any possibility of the third aspect; or, the logic circuit being used to execute the method described in the fourth aspect and any possibility of the fourth aspect.

[0094] In the eleventh aspect, a computer-readable storage medium is provided, on which a computer program or instruction is stored. When the computer program or the instruction is run on a computer, the method described in the first aspect and any possibility of the first aspect is executed; or, the method described in the second aspect and any possibility of the second aspect is executed; the method described in the third aspect and any possibility of the third aspect is executed; or, the method described in the fourth aspect and any possibility of the fourth aspect is executed.

[0095] In the twelfth aspect, a computer program product is provided, comprising instructions, which, when executed on a computer, cause the method described in the first aspect and any possibility of the first aspect to be executed; or, cause the method described in the second aspect and any possibility of the second aspect to be executed; cause the method described in the third aspect and any possibility of the third aspect to be executed; or, cause the method described in the fourth aspect and any possibility of the fourth aspect to be executed.

[0096] In the thirteenth aspect, a communication system is provided, which includes the above-mentioned first terminal device and the above-mentioned network device, the first terminal device is used to execute the method described in the above-mentioned first aspect, the second aspect, and any possible one of the first aspect and the second aspect, and the network device is used to execute the method described in the above-mentioned third aspect, the fourth aspect, and any possible one of the third aspect and the fourth aspect.

[0097] For the description of the beneficial effects of the fifth to thirteenth aspects, reference can be made to the description of the first to fourth aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0098] Figure 1 It is a schematic diagram of a communication system applicable to an embodiment of the present application.

[0099] Figure 2 is a schematic diagram of a satellite communication system applicable to an embodiment of the present application.

[0100] Figure 3 It is a schematic diagram of a cell reselection process applicable to an embodiment of the present application.

[0101] Figure 4 It is a schematic diagram of another cell reselection process applicable to an embodiment of the present application.

[0102] Figure 5 It is a schematic flow chart of a communication method applicable to an embodiment of the present application.

[0103] Figure 6 It is a schematic diagram of a first configuration information applicable to an embodiment of the present application.

[0104] Figure 7 It is a schematic diagram of another first configuration information applicable to an embodiment of the present application.

[0105] Figure 8 It is a schematic diagram of another first configuration information applicable to an embodiment of the present application.

[0106] Fig. 9 It is a schematic diagram of neighbor list information applicable to an embodiment of the present application.

[0107] Fig.10 It is a schematic diagram of the correspondence between the downlink beam and the neighboring area information applicable to the embodiment of the present application.

[0108] Fig.11 It is a schematic flow chart of another communication method applicable to the embodiment of the present application.

[0109] Fig.12 It is a schematic diagram of another type of neighbor list information applicable to an embodiment of the present application.

[0110] Fig.13 It is a schematic block diagram of an example of a communication device applicable to an embodiment of the present application.

[0111] Fig.14 It is a schematic block diagram of another communication device applicable to the embodiments of the present application.

[0112] Fig.15 It is a schematic block diagram of another communication device applicable to the embodiments of the present application. DETAILED DESCRIPTION

[0113] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0114] In order to facilitate understanding of the embodiments of the present application, the following points are first explained.

[0115] 1. In this application, unless otherwise specified, "plurality" means two or more.

[0116] 2. In this application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0117] 3. The various digital numbers involved in this application are only used for the convenience of description and are not used to limit the scope of protection of this application. The size of the serial numbers involved in this application does not mean the order of execution. The execution order of each process should be determined by its function and internal logic. For example, the terms "first", "second", "third", "fourth" and other various terminology labels (if any) in the specification and claims and drawings of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. Among them, the data used in this way can be interchangeable where appropriate, so that the embodiments described here can be implemented in an order other than what is illustrated or described here.

[0118] At the same time, any embodiment or design described in the present application as "exemplary" or "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete manner for ease of understanding.

[0119] 4. The terms "comprise", "include", "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product or apparatus.

[0120] 5. In this application, "preset" may include pre-definition, for example, protocol definition. Among them, "pre-definition" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in the device, and this application does not limit its specific implementation method.

[0121] 6. The term "storage" or "saving" as used in this application may refer to saving in one or more memories. The one or more memories may be provided separately or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories may also be partially provided separately and partially integrated in a decoder, a processor, or a communication device. The type of memory may be any form of storage medium, which is not limited thereto.

[0122] 7. In this application, unless otherwise specified, “ / ” indicates that the objects associated with each other are in an “or” relationship. For example, A / B can represent A or B. “And / or” in this application is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.

[0123] First combine Figure 1 and Figure 2 , a communication system to which an embodiment of the present application is applicable is described.

[0124] The technical solution provided in this application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) or new radio (new radio, NR) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, universal mobile telecommunication system (universal mobile telecommunication system, UMTS), etc. The technical solution provided in this application can also be applied to future communication systems, such as the sixth generation (6th generation, 6G) mobile communication system. The technical solution provided in this application can also be applied to device to device (D2D) communication, vehicle to everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), Internet of things (IoT) communication system, non-terrestrial network (NTN) communication system or other communication systems.

[0125] It should be understood that the embodiments of the present application do not particularly limit the specific structure of the execution subject of the provided method. As long as it is possible to communicate according to the method provided by the embodiments of the present application by running a program that records the code of the method provided by the embodiments of the present application, for example, the execution subject of the method provided by the embodiments of the present application may be a terminal or a network device, or a functional module in the terminal device or the network device that can call and execute the program.

[0126] As an example, Figure 1 A schematic architecture diagram of a communication system is shown. Exemplarily, the architecture may include terminal equipment, access network (AN) equipment, core network (CN), external network, etc. Among them, the external network may be a data network (DN), and the access network equipment refers to the radio access network (RAN) equipment provided in this application.

[0127] Terminal equipment: can be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal equipment of the present application can also be a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminal devices are: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MID), virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDA), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, wearable devices, terminal devices in 5G networks or terminal devices in future evolved public land mobile communication networks (PLMN), etc., and the embodiments of the present application are not limited to this.

[0128] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0129] It should be noted that the terminal device and the access network device may communicate with each other using a certain air interface technology (such as but not limited to NR or LTE technology, etc.). The terminal devices may also communicate with each other using a certain air interface technology (such as but not limited to NR or LTE technology, etc.).

[0130] In the embodiment of the present application, the device for realizing the function of the terminal device can be the terminal device, or it can be a device that can support the terminal device to realize the function, such as a chip system or a chip, which can be installed in the terminal device. In the embodiment of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0131] Access network equipment: It can also be called RAN node, RAN equipment, etc. RAN can provide authorized users in a specific area with the function of accessing the communication network. Access network equipment can specifically include wireless network equipment in the 3rd generation partnership project (3GPP) network, and can also include access points in non-3GPP networks. For the convenience of description, the following uses access network (AN) equipment to represent it.

[0132] Access network equipment can use different wireless access technologies. There are currently two types of wireless access technologies: 3GPP access technology (for example, the wireless access technology used in the third generation (3rd generation, 3G), fourth generation (4th generation, 4G) or 5G systems) and non-3GPP (non-3GPP) access technology. 3GPP access technology refers to access technology that complies with 3GPP standards and specifications. For example, the access network equipment in the 5G system is called the next generation NodeBase station (gNB) node or RAN equipment. Non-3GPP access technology may include air interface technology represented by access points (AP) in wireless fidelity (WiFi), worldwide interoperability for microwave access (WiMAX), code division multiple access (CDMA), etc. Access network equipment can allow terminal devices and 3GPP core networks to interconnect and communicate using non-3GPP technologies.

[0133] Access network equipment is responsible for wireless resource management, quality of service (QoS) management, data compression and encryption, etc. on the air interface side. Access network equipment provides access services for terminal devices, and then completes the forwarding of control signals and user data between terminal devices and the core network.

[0134] The access network equipment may include, for example, but is not limited to: macro base stations, micro base stations (also called small stations), radio network controllers (RNCs), node Bs (NBs), base station controllers (BSCs), base transceiver stations (BTSs), home base stations (e.g., home evolved NodeBs, or home Node Bs, HNBs), baseband units (BBUs), APs in WiFi systems, wireless relay nodes, wireless backhaul nodes, transmission points (TPs) or transmission and reception points (TRPs), etc., and may also be gNBs or transmission points (TRPs or TPs) in 5G (e.g., NR) systems, one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or network nodes constituting gNBs or transmission points, such as distributed units (DUs), or base stations in next-generation communication 6G systems, etc. The embodiments of the present application do not limit the specific technology and specific device form used by the AN equipment.

[0135] Core network: responsible for user access control, mobility management, session management, user authentication, billing and other services. It consists of multiple functional units, which can be divided into functional entities of control plane and data plane. The access and mobility management function (AMF) network element is responsible for user access management and control, user authentication and mobility management. The user plane function (UPF) network element is responsible for managing the transmission of user plane data, traffic statistics and other functions. The session management function (SMF) network element is mainly responsible for the control plane function of user session management.

[0136] In an embodiment of the present application, when the distance between the access network device and the terminal device is far, Figure 1The application scenario of the communication system shown can be the above-mentioned NTN communication system, such as a satellite communication network, a high altitude platform system (HAPS), and an air-to-ground network. For example, a satellite communication system includes a satellite base station, which provides communication services for terminal devices. The satellite base station can also communicate with a ground base station. A satellite can be used as a base station or as a terminal device. Among them, the satellite can refer to non-ground base stations or non-ground devices such as drones, hot air balloons, low-orbit satellites, medium-orbit satellites, and high-orbit satellites. The NTN communication system can be applied to special communication scenarios or scenarios where it is difficult for ground cellular networks to fully cover, such as Gobi, deserts, oceans, remote mountainous areas, etc., or it can be applied to scenarios where ground cellular networks are destroyed after natural disasters such as floods and earthquakes that damage ground infrastructure, so as to provide reliable network services to terminal users. The NTN communication system can be deployed alone or as a supplement to the ground network.

[0137] For example, Figure 2 Schematic diagram of a satellite communication system applicable to an embodiment of the present application. Taking the 5G network as an example, the terminal equipment on the ground accesses the network through the 5G new air interface, and the 5G access network equipment is deployed on the satellite and connected to the core network on the ground through a wireless link. At the same time, there is a wireless link between the satellites to complete the signaling interaction and user data transmission between the 5G access network equipment and the 5G access network equipment. Figure 2 The various network elements and the interfaces between them are described as follows:

[0138] 5G New Air Interface: The wireless link between terminal devices and 5G access network equipment.

[0139] Terminal device: A mobile device that supports the 5G new air interface, typically a mobile phone, pad, and other mobile terminal devices. It can access the satellite network through the air interface and initiate calls, surf the Internet, and other services. For details, please refer to the description of the terminal device above.

[0140] 5G access network equipment: mainly provides wireless access services, dispatches wireless resources to access terminals, provides reliable wireless transmission protocols and data encryption protocols, such as base stations.

[0141] 5G core network: user access control, mobility management, session management, user authentication, billing and other services. It consists of multiple functional units, which can be divided into functional entities of control plane and data plane. AMF network element is responsible for user access management and control, user authentication and mobility management. UPF network element is responsible for managing user plane data transmission, traffic statistics and other functions. SMF network element is mainly responsible for the control plane function of terminal device session management.

[0142] Ground station: responsible for forwarding signaling and service data between 5G access network equipment and 5G core network.

[0143] Xn interface: The interface between 5G access network devices, mainly used for signaling interaction such as switching.

[0144] NG interface: The interface between 5G access network equipment and 5G core network, which mainly interacts with the signaling of the non-access stratum (NAS) of the core network and the user's business data.

[0145] Optionally, the satellite communication may include a transparent forwarding scenario or a regeneration mode scenario. For example, Figure 2 The two 5G access network devices shown can be in a transparent forwarding scenario or a regeneration mode scenario. In the transparent forwarding scenario, the satellite as a 5G access network device only plays the role of frequency conversion forwarding; in the regeneration mode scenario, the satellite as a 5G access network device can include the above-mentioned gNB device or DU, etc.

[0146] It should be noted that the technical solution of the present application can also be applied to other NTN scenarios where the access network equipment and the terminal equipment are far away. Figure 2 Satellite communication scenario shown.

[0147] The following describes the existing cell reselection process and existing technical problems.

[0148] The cell reselection process is different from the cell selection process. Cell selection means that when the terminal device is turned on or a wireless link failure occurs, the terminal device will perform a cell search process and select a suitable cell to reside as soon as possible; the cell reselection process means that after the terminal device resides in a cell, as the terminal device moves or the satellite in the NTN communication system moves, the terminal device may need to change to another cell with a higher priority or better signal to reside. In other words, cell selection is the process of the terminal device finding a suitable cell as soon as possible, and cell reselection is the process of the terminal device selecting a more suitable cell. For example, if the cell diameter is 50km, assuming that the low-orbit satellite moves at a speed of 7.56km / s, the terminal device needs to complete a cell reselection in about 6s due to the movement of the satellite. The cell where the terminal device resides refers to the service cell currently being used by the terminal device, that is, the cell where the terminal device establishes a connection with the network and transmits data.

[0149] Exemplarily, the process of cell selection may be as follows: during the cell search process, the terminal device reads the system information of the cell and obtains the Q rxlevmeas , Q rxlevmin and Q rxlevminoffset Among them, Q rxlevmeasIt refers to the received signal strength value measured by the terminal device, which is the measured reference signal received power (RSRP) (dBm); Q rxlevmin It refers to the minimum received signal strength value required by the cell, which can be indicated by q-RxLevMin in the SIB1 message of the cell (dBm); Q rxlevminOffset This parameter is only valid when the mobile station normally resides in a virtual private mobile network (VPMN) and periodically searches for a high-priority public land mobile network (PLMN) for cell selection evaluation. rxlevmin Make some bias.

[0150] After obtaining the above parameters, the terminal device can evaluate whether the cell is a suitable cell according to the S criterion. Once a suitable cell (i.e., a cell that meets the S criterion) is found, the terminal device can be considered to have completed the cell selection process. If the cell is not a suitable cell, the terminal device continues to search until a suitable cell is found and resides.

[0151] Meeting the S criterion means that Srxlev (S value)>0, that is, if the S value of a cell is greater than 0, it means that the cell is a suitable cell (a cell suitable for residence). Srxlev refers to the level value (dB) calculated during the cell selection / reselection process. The specific calculation formula of Srxlev is as follows:

[0152] Srxlev=Q rxlevmeas -(Q rxlevmin -Q rxlevminoffset )-P compensation

[0153] Among them, P compensation is max(PEMAX–PUMAX, 0) (dB), where PEMAX is the maximum allowed transmit power (dBm) set by the system when the terminal device accesses the cell; PUMAX refers to the maximum output power or maximum uplink transmit power (dBm) specified according to the terminal device level.

[0154] Exemplarily, the process of cell reselection can be the following steps: The terminal device measures the signal quality level of neighboring cells (i.e., the neighboring cells of the source cell to which the terminal device is currently connected), and for different neighboring cells, the terminal device can evaluate according to different reselection rules, and finally reselect a cell. When the terminal device performs measurements and cell reselection, the priority information of adjacent frequencies can be used. By configuring the priorities of each frequency point, it is more convenient to guide the terminal device to reselect and camp on a cell with a higher priority, achieving balanced network load, improving resource utilization rate, and ensuring the signal quality of the terminal device. The measurement criteria are as follows:

[0155] For service cells of a frequency layer or system with a priority higher than that of the source cell where the terminal device is currently camping, the terminal device always measures the signal quality level of these service cells; if the Srxlev of a neighboring cell <= Sintrasearch (the same-frequency measurement start threshold), the terminal device starts to measure the same-frequency cells; if the Srxlev of a neighboring cell <= Snonintrasearch (the inter-frequency measurement start threshold) or Snonintrasearch is not configured, the UE starts to measure cells of the same priority frequency or lower priority frequency and system.

[0156] After the above measurement process, the terminal device will determine whether to perform reselection to a new cell, and the reselection criteria are as follows:

[0157] Reselection criteria for high-priority frequency or system: The Srxlev of the target frequency cell > Threshx,high (the decision threshold for high-priority cells) and lasts for the time set by the cell reselection timer (TreselectionRAT);

[0158] Reselection criteria for low-priority frequency or system: The Srxlev of the serving cell < Threshserving,low (the decision threshold for low-priority cells), and the Srxlev of the target frequency cell > Threshx,low and lasts for the time set by the cell reselection timer (TreselectionRAT);

[0159] Reselection criteria for the same-priority frequency or system: The cell reselection to a cell in the same-priority frequency is based on the Ranking standard for intra-frequency cell reselection. The intra-frequency cell reselection standard (Ranking) is defined by the following formula:

[0160] R s = Q meas,s + Qhyst s

[0161] R n = Q meas,s - Q offset

[0162] Among them, Rs is the ranking value of the current serving cell; Rn is the ranking value of the neighboring cell; Qhyst s is the hysteresis value, used to prevent ping-pong reselection; Q meas is the received signal strength value of the cell measured by the UE; for the same frequency, Q offset The value is Q offsets,n ; For heterodyne, Q offset The value is Q offsets,n +Q offsetfrequency .

[0163] The terminal device will sort the ranking values ​​of all cells that meet the above S criteria and reselect the cell with the best ranking. The system message of the cell where the terminal device is currently staying will broadcast the above required configuration parameters of the current cell and neighboring cells, so that the terminal device can calculate R s and R n And other parameters.

[0164] At present, after the conditions for cell reselection are triggered, the terminal device will detect the synchronization signal and PBCH block (SSB) message of the neighboring cell, and then detect the system information block 1 (SIB1) message of the neighboring cell, and find the target cell and reside in it according to the cell reselection rules. The SIB1 message is cell-specific information in the LTE system, carrying key information required for the terminal device to access the cell, including the cell ID, the operator ID (i.e. PLMN) to which the cell belongs, whether the cell is prohibited (cellBarred, this parameter tells the terminal device whether the current cell can be accessed), paging parameters and random access parameters. During the cell reselection process, the terminal device needs to search and decode the SIB1 information in the neighbor cell announcement message in order to evaluate the quality of the neighboring cell and receive related information. If the terminal device resides in the VPLMN, it is also necessary to periodically search for a high-priority PLMN to evaluate the Q signaling notification of Srxlev. rxlevmin These operations ensure that the terminal equipment can obtain relevant information in a timely manner and perform cell reselection when necessary to maintain the stability and reliability of communication.

[0165] However, in the process of reselecting the target cell for resident or detecting the SIB1 message, there is a problem of poor user service experience of the terminal device.

[0166] For example, Figure 3 FIG. 3 is a schematic diagram showing a cell reselection process 300. Figure 3As shown, after the conditions for triggering cell reselection are met, the terminal device measures the SSB messages of multiple neighboring cells, and can measure the SIB1 messages of the multiple neighboring cells at the same time, and then finds the target cell and resides according to the cell reselection rules. However, in the above cell reselection process, when the number of neighboring cells is large, the terminal device needs to search for SIB1 messages of a large number of neighboring cells, and the functional overhead of the terminal device is large. In addition, in the scenario of the NTN communication system, since different neighboring cells may correspond to different satellites and factors such as wireless environment, frequency band allocation, equipment performance and configuration parameters, the time-frequency deviation between different neighboring cells is large, and the SIB1 messages of different neighboring cells may interfere with each other, resulting in the terminal device being unable to decode correctly. In order to separate the SIB1 information of different cells in time and frequency to avoid mutual interference, the terminal device needs to search for SIB1 messages in time by cell. For example, the terminal device can complete the measurement of SIB1 messages of 5 neighboring cells by searching for at least 5 cycles, that is, the search cycle of the terminal device searching for SIB1 messages is long. Therefore, due to the large power consumption overhead and long search cycle of the terminal device, the user service experience of the terminal device is poor.

[0167] For example, Figure 4 FIG. 4 is a schematic diagram showing another cell reselection process 400. Figure 4 As shown, at this stage, after the terminal device detects the SSB message of the neighboring cell, it can determine the destination cell of the cell reselection process according to the detection result of the SSB message of the neighboring cell (such as the received signal strength value or the maximum output power mentioned above), that is, the destination cell is the most suitable cell selected by the terminal device from multiple neighboring cells. Then, after the terminal device resides in the destination cell, it searches for the SIB1 message of the destination cell. In this way, the terminal device only needs to use 1 cycle to measure the SIB1 message of a destination cell, or in other words, the number of SIB1s that need to be searched during the cell reselection process is relatively small, thereby reducing the power consumption overhead of the terminal device and reducing the search cycle of the SIB1 message.

[0168] However, during the period after the terminal device camps on the target cell and before searching for the SIB1 message of the target cell, the terminal device does not have the paging and random access parameter configuration of the target cell, and thus cannot receive paging or initiate random access. Figure 4In the steps shown, before the terminal device resides in the target cell, the terminal device can use the paging or random access parameter configuration of the source cell; after the terminal device searches for the SIB1 message of the target cell, the terminal device can use the paging or random access parameter configuration of the target cell in the SIB1 message; however, in the intermediate time period, the terminal device has no available paging and random access parameter configuration. In this way, when the user uses the terminal device, there will be a problem that the paging cannot be received or the random access cannot be initiated in some time periods due to the cell reselection of the terminal device, thereby affecting the user experience.

[0169] In order to solve the above technical problems, the present application provides a communication method 500 and a communication method 1100, which can improve the user service experience of the terminal device during the cell reselection process.

[0170] The following will be combined with the attached Figure 5 To Attachment Fig.10 , a communication method 500 provided in an embodiment of the present application is described. The communication method 500 can be used to solve the problem that the terminal device cannot receive paging or initiate random access during the above cell reselection process.

[0171] Figure 5 It is a schematic diagram of the interaction flow of the communication method 500 according to an embodiment of the present application. Figure 5 The method shown can be executed by a terminal device and a network device, or by a module and / or device (e.g., a chip or an integrated circuit, etc.) with corresponding functions installed in the terminal device and the network device, and this application does not limit this. The network device mentioned below can be the above-mentioned access network device. The following description takes the terminal device and the network device as examples. Figure 5 As shown, the method 500 includes:

[0172] Step S510: The network device determines first configuration information, where the first configuration information is used to configure configuration parameters of paging and / or random access of the terminal device in the target cell.

[0173] Specifically, the first configuration information may be indication information indicating paging and / or access parameter configuration, or may be configuration parameters related to the paging process and / or random access process. For example, the configuration parameters of paging may include the paging cycle, the starting position of the paging frame, the paging channel configuration, the number of paging occasions per paging frame (number of pagingoccasion per paging frame) (or parameter ns), etc., and the configuration parameters of random access may include the time-frequency resource position of the random access occasion (RACH occasion, RO), the root sequence number of the preamble, etc. In some other embodiments of the present application, the configuration parameters of random access may also include configuration parameters of two-step random access or configuration parameters of dedicated random access. For example, the configuration parameters of two-step random access may include the type of physical random access channel (PRACH), etc., and the configuration parameters of dedicated random access may include the number of non-dedicated random access preambles or the configuration of the preamble group, etc.

[0174] S520: The network device sends the first configuration information to the terminal device.

[0175] Optionally, the network device may directly send the first configuration information to the terminal device, or send the first configuration information by sending neighbor list information to the terminal device, or the content of the first configuration information may be included in the neighbor list information sent by the network device. For example, the first configuration information may be included in the parameter list of neighbor information such as NTN-NeighCellConfig-r17 in the SIB19 message, IntraFreqNeighCellInfo in the SIB3 message, and InterFreqNeighCellInfo in the SIB4 message.

[0176] Optionally, when the first configuration information is included in the neighbor list information, the network device may send the neighbor information of multiple cells included in the neighbor list information through one or more downlink beams. For example, the network device may send the neighbor information of the multiple cells through multiple downlink beams, where each downlink beam is used to notify the neighbor information of at least one cell among the multiple cells.

[0177] S530, after the terminal device resides in the target cell through the cell reselection process and before searching for the system message block SIB1 message of the target cell, the terminal device receives paging of the target cell and / or initiates random access of the terminal device in the target cell according to the first configuration information.

[0178] Through the above method, the terminal device can receive paging or initiate random access in the time period after camping on the target cell and before searching for the SIB1 message of the target cell. In this way, when the user uses the terminal device, there will be no problem of being unable to receive paging or initiate random access in some time periods due to the cell reselection of the terminal device, thereby improving the user service experience of the terminal device.

[0179] The following is combined with Figure 6 To Attachment Figure 8 An embodiment of the first configuration information or an embodiment of step S510 in the present application is introduced.

[0180] In some embodiments of the present application, the first configuration information may include indication information for indicating whether the paging configuration parameters and / or random access configuration parameters of the destination cell and the source cell are the same. Specifically, the value of the indication information in the first configuration information may be true or false, and the value is true, which means that the paging configuration parameters and / or random access configuration parameters of the destination cell and the source cell are the same, and the value is false, which means that the paging configuration parameters and / or random access configuration parameters of the destination cell and the source cell are different.

[0181] In this way, when the value of the indication information is true, the terminal device can continue to use the configuration parameters of the paging process and / or the configuration parameters of the random access of the source cell within the above time period. In other words, when the configuration parameters of the paging process and / or the configuration parameters of the random access process of the destination cell are the same as those of the source cell, the terminal device can receive the paging of the terminal device in the destination cell and / or initiate random access of the terminal device in the destination cell according to the configuration parameters of the paging process and / or the configuration parameters of the random access process of the source cell.

[0182] Specifically, during the process of cell reselection of the terminal device, if the indication information related to the paging process and the indication information related to the random access process in the first configuration information are both true, then the terminal device can receive paging or initiate random access through the configuration parameters of the source cell during the above-mentioned time period; if the indication information related to the paging process in the first configuration information is true and the indication information related to the random access process is false, then the terminal device can only receive paging but cannot initiate random access during the above-mentioned time period; similarly, if the indication information related to the paging process in the first configuration information is false and the indication information related to the random access process is true, then the terminal device can only initiate random access but cannot receive paging during the above-mentioned time period.

[0183] Figure 6 FIG. 4 is a schematic diagram showing the first configuration information in the above embodiment. Figure 6As shown, in the paging configuration parameters, the number of paging occasions of each paging frame of the source cell and the destination cell is the same but the paging cycle is different, and then the network device determines that the value of the indication information pagingConfigIndicate related to the paging process in the first configuration information is false; in the random access configuration parameters, all parameters of the source cell and the destination cell (such as Figure 6 The time-frequency resource position of the RO and the root sequence number of the leading are exactly the same, and then the network device determines that the value of the indication information RACHConfigIndicate related to the random access process in the first configuration information is true. Figure 6 In the case shown, after receiving the first configuration information sent by the network device, the terminal device can initiate random access in the target cell within the above time period according to the random access configuration parameters of the source cell, but the terminal device cannot receive paging in the target cell.

[0184] It is worth noting that Figure 6 The names of the indication information pagingConfigIndicate and RACHConfigIndicate are only examples and do not limit the naming of the first configuration information. The naming of the first configuration information and the second configuration information involved below is similar.

[0185] In some other embodiments of the present application, the first configuration information may be configuration parameters related to the paging process and / or the random access process. For example, the first configuration information may include configuration parameters related to the paging process and / or the random access process of the destination cell, that is, the network device directly sends the configuration parameters related to the paging process and / or the random access process of the destination cell to the terminal device, and then the terminal device can directly use the received configuration parameters of the paging process and / or the random access process of the destination cell to accept paging or initiate random access during the above time period. For another example, the first configuration information may include different parameters for the source cell and the destination cell, for example, the number of paging opportunities for each paging frame of the source cell and the destination cell is the same but the paging cycle is different, then the network device can only add the content of the paging cycle in the first configuration information, so that the terminal device defaults to the number of paging opportunities for each paging frame of the destination cell being the same as that of the source cell during the above time period. In this way, the length of the content included in the first configuration information can be reduced, thereby improving the transmission rate and improving data stability.

[0186] Figure 7 A schematic diagram showing that the first configuration information in the above embodiment only includes different parameters. Figure 7 The configuration parameters shown are similar to Figure 6The same means that the number of paging occasions in each paging frame of the source cell and the target cell is the same but the paging cycle is different and the configuration parameters of random access of the source cell and the target cell are exactly the same. Further, the network device can determine that the first configuration information only includes the paging cycle and its value of the target cell. Figure 7 In the case shown in the figure, after receiving the first configuration information sent by the network device, the terminal device can Figure 7 The number of paging occasions of each paging frame of the source cell and the configuration parameters of random access are shown, so as to initiate random access in the target cell and receive paging in the target cell within the above time period.

[0187] Optionally, Figure 6 The illustrated embodiment can be used with Figure 7 The embodiments shown can be combined. Figure 6 When the value of at least one indication information shown is false, the network device can add Figure 7 The different configuration parameters of the source cell and the target cell are shown. Figure 8 A schematic diagram of another first configuration information is shown, such as Figure 8 As shown, the value of the indication information related to paging in the first configuration information is false, and the network device can add configuration parameters of the paging process that are different between the source cell and the target cell in the first configuration information, such as Figure 8 The paging cycle and its value are shown.

[0188] The following is combined with Fig. 9 and attached Fig.10 An embodiment of step S520 in the present application is introduced.

[0189] As mentioned above, the first configuration information may be included in the neighboring cell list information sent by the network device. The neighboring cell list information is used to identify multiple neighboring cells adjacent to the source cell, and can be used to assist the terminal device in completing the cell reselection process. For example, the neighboring cell list information lists the neighboring cell information of each neighboring cell in multiple neighboring cells, and the neighboring cell information includes the cell's location, coverage, neighboring cell frequency, signal quality, signal strength, cell representation and other information. The network device may add the first configuration information related to the destination cell (the destination cell is one of multiple neighboring cells, or the terminal device determines the destination cell from multiple neighboring cells) to the neighboring cell information of the destination cell.

[0190] Fig. 9 A schematic diagram showing the first configuration information included in the neighbor list information. Fig. 9(a) shows that the first configuration information can be set in the parameter list NTN-NeighCellConfig-r17 of the SIB19 message, and the underlined parameters are the parameters newly added by the network device in the neighbor list information. Figure 6 The first configuration information shown. Fig. 9 (b) shows that the first configuration information can be set in the parameter list IntraFreqNeighCellInfo of the SIB3 message, and the underlined parameters are the parameters added by the network device in the neighbor list information. Figure 7 The first configuration information shown in the figure. Among them, the PCCH-Config shown in the figure may include one or more configuration parameters indicating the paging channel, and the RACH-ConfigCommon may include one or more configuration parameters indicating random access. Fig. 9 As shown in (c), the first configuration information may also be set in the parameter list InterFreqNeighCellInfo of the SIB4 message.

[0191] In the above-mentioned embodiment in which the network device sends the first configuration information through the neighbor cell list information, the network device can notify the neighbor cell information of multiple neighbor cells in the neighbor cell list information through only one downlink beam, or can notify the neighbor cell information of different neighbor cells through different downlink beams based on information such as the position of the downlink beam. Fig.10 FIG. 1 shows a schematic diagram of a downlink beam. Fig.10 As shown in (a) in FIG. 1 , the network device can notify all neighboring cells of neighboring cell information only through beam 1; Fig.10 As shown in (b), the network device can notify the neighboring cell information of neighboring cell A through beam 2, notify the neighboring cell information of neighboring cell B and neighboring cell C through beam 3, and notify the neighboring cell information of neighboring cell D through beam 4, that is, each downlink beam can be used to notify the neighboring cell information of at least one neighboring cell.

[0192] Through the above communication method 500, the terminal device can receive paging or initiate access in the time period after the terminal device resides in the target cell and before searching for the SIB1 message of the target cell. In this way, when the user uses the terminal device, there will be no problem of being unable to receive paging or initiate access in some time periods due to the cell reselection of the terminal device, thereby improving the user service experience of the terminal device.

[0193] The following will be combined with the attached Fig.11 and attached Fig.12 , a communication method 1100 provided in an embodiment of the present application is described. The communication method 1100 can be used to solve the problem of large power consumption and long search cycle of the above-mentioned terminal device.

[0194] Specifically, in the cell reselection process of the communication method 1100, the terminal device measures the SSB messages of multiple neighboring cells after the conditions for triggering cell reselection are met, and measures the SIB1 messages of multiple neighboring cells at the same time, and then finds the destination cell and resides there according to the cell reselection rules. The second configuration information in the communication method 1100 can be used to indicate some of the multiple neighboring cells, and the above-mentioned part of the neighboring cells needs to be searched for SIB1 messages. In other words, the second configuration information includes the neighboring cells that have been screened out and need to search for SIB1 messages, so that the terminal device only needs to search for SIB1 messages of the neighboring cells indicated in the second configuration information, and does not need to search for SIB1 messages of all neighboring cells. For example, there are 10 cells adjacent to the source cell, and the second configuration information can indicate that 4 of the cells need to be searched for SIB1 messages, so that the terminal device originally needed 10 cycles to search for SIB1 messages in the neighboring cells, and now only needs 4 cycles to search for SIB1 messages in the neighboring cells.

[0195] Fig.11 It is a schematic diagram of the interaction flow of the communication method 1100 according to an embodiment of the present application. Fig.11 The method shown can be executed by a terminal device and a network device, or by a module and / or device (e.g., a chip or an integrated circuit, etc.) with corresponding functions installed in the terminal device and the network device, and this application does not limit this. The network device mentioned below can be the above-mentioned access network device. The following description takes the terminal device and the network device as examples. Fig.11 As shown, the method 1100 includes:

[0196] Step S1110, the network device determines second configuration information, where the second configuration information is used to indicate that N cells among K cells adjacent to the source cell where the terminal device currently resides need to be searched for SIB1 messages, where N is a positive integer and K is a positive integer greater than N.

[0197] Optionally, the second configuration information may include indication information for indicating whether multiple neighboring cells need to be searched for SIB1 messages, for example, cells whose indication information has a value of true need to be searched for SIB1 messages, and cells whose indication information has a value of false do not need to be searched for SIB1 messages; the second configuration information may also include a list of cells that need to be searched for SIB1 messages compiled by the network device, for example, if cell A and cell D need to be searched for SIB1 messages, then cell A and cell D are included in the cell list.

[0198] Optionally, in an embodiment of the present application, the network device may determine the second configuration information based on a priori information, and the a priori information is used to indicate the probability that each cell needs to be searched for SIB1 messages. For example, the network device may compare the probability that each cell needs to be searched for SIB1 with a preset probability threshold such as 50%, and the value of the above indication information corresponding to the cell whose probability of needing to be searched for SIB1 is higher than 50% is true, and the value of the above indication information corresponding to the cell whose probability is lower than 50% is false, or the network device arranges the cells whose probability is higher than 50% in the cell list.

[0199] Exemplarily, the network device may determine the prior information based on the distance between the satellite corresponding to the neighboring cell and the satellite corresponding to the source cell. For example, when the distance between the satellite corresponding to the neighboring cell and the satellite corresponding to the source cell is close or the distance is less than a preset distance threshold, the network device determines that the probability that the neighboring cell needs to be searched for SIB1 messages is high, or the network device sorts the distances between the satellites corresponding to all neighboring cells and the satellites corresponding to the source cell, and the neighboring cells with higher sorting have a higher probability of being searched for SIB1 messages.

[0200] Exemplarily, the network device may also determine the prior information based on the orbit of the satellite corresponding to the neighboring cell and the orbit of the satellite corresponding to the source cell. For example, the closer the orbit of the satellite corresponding to the neighboring cell is to the orbit of the satellite corresponding to the source cell, the higher the probability that the neighboring cell needs to be searched for SIB1 messages.

[0201] Step S1120: The network device sends the second configuration information to the terminal device.

[0202] The embodiment of step S1120 is similar to the embodiment of step S520, that is, the network device can send the second configuration information by sending the neighbor list information to the terminal device. The second configuration information can be included in the parameter list of neighbor information such as NTN-NeighCellConfig-r17 in the SIB19 message, IntraFreqNeighCellInfo in the SIB3 message, and InterFreqNeighCellInfo in the SIB4 message. Fig.12 A schematic diagram showing the neighbor list information including the second configuration information.

[0203] like Fig.12As shown in (a), the second configuration information includes indication information NeighborSIB1Indicate for indicating whether multiple neighboring cells need to be searched for SIB1 messages. Among them, if the value of the indication information NeighborSIB1Indicate of neighboring cell A is true, and the value of the indication information NeighborSIB1Indicate of neighboring cell B is false, then neighboring cell A needs to be searched for SIB1 messages. Then, when the terminal device receives the neighboring cell information of neighboring cell A in the neighboring cell list information, it can search for the SIB1 message of neighboring cell A according to the indication information of neighboring cell A.

[0204] like Fig.12 As shown in (b), the second configuration information may also include a list of cells that need to be searched for SIB1 messages, which is sorted out by the network device. For example, if cells A and D need to be searched for SIB1 messages, the network device may directly send the sorted cell list (including cells A and D, etc.) to the terminal device.

[0205] Step S1130: The terminal device searches for SIB1 messages of the N cells from K cells adjacent to the currently resident source cell according to the second configuration information.

[0206] Through the above method, during the cell reselection process, the number of SIB1 messages that the terminal device needs to search for is reduced, thereby reducing the power consumption overhead of the terminal device and reducing the period of the cell's simultaneous search for SIB1 messages.

[0207] Finally, the device embodiment of the embodiment of the present application is introduced.

[0208] In order to implement the functions in the method provided in this application, the terminal device and the network device may include a hardware structure and / or a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

[0209] Fig.13 13 is a schematic block diagram of a communication device 1300 according to an embodiment of the present application. The communication device 1300 includes a processor 1310 and a communication interface 1320, and the processor 1310 and the communication interface 1320 may be interconnected via a bus 1330. The communication device 1300 may be a network device or a terminal device.

[0210] Optionally, the communication device 1300 may further include a memory 1340. The memory 1340 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a portable read-only memory (CD-ROM), and the memory 1340 is used to store relevant instructions and data.

[0211] The processor 1310 may be one or more central processing units (CPUs). When the processor 1310 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0212] When the communication device 1300 is a terminal device, illustratively, the communication device 1300 is used to perform the following operations: receiving first configuration information sent by a network device, etc.

[0213] When the communication device 1300 is a network device, illustratively, the communication device 1300 is used to perform the following operations: sending first configuration information to a terminal device, etc.

[0214] The above contents are only exemplary descriptions. When the communication device 1300 is a network device / terminal device, it will be responsible for executing the methods or steps related to the network device / terminal device in the above method embodiments.

[0215] The above description is only an exemplary description. For specific content, please refer to the content shown in the above method embodiment. Fig.13 The implementation of each operation can also refer to Figure 5 and Fig.11 The corresponding description of the method embodiment shown.

[0216] Fig.14 1 is a schematic block diagram of a communication device 1400 of an embodiment of the present application. The communication device 1400 may be a network device or a terminal device, or may be a chip or module in the network device or the terminal device, for implementing the method involved in the above embodiment. The communication device 1400 includes a transceiver unit 1410 and a processing unit 1420. The transceiver unit 1410 and the processing unit 1420 are exemplarily introduced below.

[0217] The transceiver unit 1410 may include a transmitting unit and a receiving unit. The transmitting unit is used to perform a transmitting action of the communication device, and the receiving unit is used to perform a receiving action of the communication device. For ease of description, the embodiment of the present application combines the transmitting unit and the receiving unit into one transceiver unit. A unified description is given here, and no further description is given later.

[0218] When the communication device 1400 is a terminal device, exemplarily, the transceiver unit 1410 is used to receive first configuration information sent by a network device, and the processing unit 1420 is used to receive paging of the terminal device in a destination cell and / or initiate random access of the terminal device in the destination cell according to the first configuration information.

[0219] When the communication device 1400 is a network device, illustratively, the processing unit 1420 is used to determine the first configuration information, etc., and the transceiver unit 1410 is used to send the first configuration information, etc. to the terminal device.

[0220] The above contents are only exemplary descriptions. When the communication device 1400 is a network device / terminal device, it will be responsible for executing the methods or steps related to the network device / terminal device in the above method embodiments.

[0221] Optionally, the communication device 1400 further includes a storage unit 1430, and the storage unit 1430 is used to store a program or code for executing the aforementioned method.

[0222] Fig.13 and Fig.14 The device embodiment shown is used to implement Figures 5 to 12 The content described. Fig.13 and Fig.14 The specific execution steps and methods of the device shown can refer to the contents described in the aforementioned method embodiment.

[0223] Fig.15 1 is a schematic block diagram of a communication device 1500 according to an embodiment of the present application. The communication device 1500 is used to implement the functions of a network device / terminal device. The communication device 1500 may be a chip in a network device / terminal device.

[0224] The communication device 1500 includes: an input / output interface 1520 and a processor 1510. The input / output interface 1520 may be an input / output circuit. The processor 1510 may be a signal processor, a chip, or other integrated circuit that can implement the method of the present application. The input / output interface 1520 is used for inputting or outputting signals or data.

[0225] For example, when the communication device 1500 is a terminal device, the input / output interface 1520 is used to receive the first configuration information from the network device. The processor 1510 is used to receive the paging of the terminal device in the target cell and / or initiate random access of the terminal device in the target cell according to the first configuration information.

[0226] For example, the communication device 1500 is a network device, and the processor 1510 is used to determine the first configuration information. The input and output interface 1520 is used to send the first configuration information to the terminal device.

[0227] In one possible implementation, the processor 1510 implements the functions implemented by the network device or the terminal device by executing instructions stored in the memory.

[0228] Optionally, the communication device 1500 also includes a memory.

[0229] Optionally, the processor and memory are integrated together.

[0230] Optionally, the memory is outside the communication device 1500 .

[0231] In a possible implementation, the processor 1510 may be a logic circuit, and the processor 1510 inputs / outputs messages or signals through the input / output interface 1520. The logic circuit may be a signal processor, a chip, or other integrated circuit that can implement the method of the embodiment of the present application.

[0232] The above description of the communication device 1500 is only an exemplary description. The communication device 1500 can be used to execute the method described in the above embodiment. The specific content can be found in the description of the above method embodiment, which will not be repeated here.

[0233] The present application also provides a chip, including a processor, for calling and executing instructions stored in a memory from the memory, so that a communication device equipped with the chip executes the methods in the above examples.

[0234] The present application also provides a chip, including: an input interface, an output interface, and a processor, wherein the input interface, the output interface, and the processor are connected via an internal connection path, and the processor is used to execute the code in the memory, and when the code is executed, the processor is used to execute the method in each of the above examples. Optionally, the chip also includes a memory, and the memory is used to store computer programs or codes.

[0235] The present application also provides a processor, which is coupled to a memory and is used to execute the methods and functions involving a network device or a terminal device in any of the above embodiments.

[0236] The present application provides a computer program product including instructions. When the computer program product is run on a computer, the method of the above embodiment is implemented.

[0237] The present application also provides a computer program. When the computer program is executed in a computer, the method of the above embodiment is implemented.

[0238] The present application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a computer, the method described in the above embodiment is implemented.

[0239] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0240] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0241] In several embodiments provided in the present application, the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0242] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the technical solution of the embodiment of the present application.

[0243] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0244] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of each method embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks.

[0245] The above is only a specific implementation of the present application, but the protection scope of the embodiments of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the embodiments of the present application should be included in the protection scope of the embodiments 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 communication method, characterized in that: The method is applied to a terminal device, and the method comprises: Receiving first configuration information sent by a network device, where the first configuration information is used to configure configuration parameters of paging and / or random access of the terminal device in a target cell, where the target cell is a neighboring cell of a source cell where the terminal device currently resides; After residing in the target cell through the cell reselection process and before searching for the system message block SIB1 message of the target cell, according to the first configuration information, receiving the paging of the terminal device in the target cell and / or initiating random access of the terminal device in the target cell.

2. The method according to claim 1, characterized in that The first configuration information includes indication information for indicating whether the paging configuration parameters and / or random access configuration parameters of the target cell and the source cell are the same; In a case where configuration parameters of a paging process and / or a random access process of the target cell are the same as those of the source cell, receiving paging of the terminal device in the target cell and / or initiating random access of the terminal device in the target cell according to the first configuration information includes: According to the configuration parameters of the paging process of the source cell and / or the configuration parameters of the random access process, the paging of the terminal device in the target cell is received and / or the random access of the terminal device in the target cell is initiated.

3. The method according to claim 1 or 2, characterized in that: The first configuration information includes different paging configuration parameters and / or different random access configuration parameters of the target cell and the source cell; The receiving, according to the first configuration information, paging of the terminal device in the target cell and / or initiating random access of the terminal device in the target cell includes: Based on the first configuration information of the destination cell and other paging configuration parameters and / or other random access configuration parameters of the source cell except the configuration parameters included in the first configuration information, paging of the terminal device in the destination cell is received and / or random access of the terminal device in the destination cell is initiated.

4. The method according to claim 1, characterized in that: The first configuration information includes paging configuration parameters and / or random access configuration parameters of the target cell.

5. The method according to any one of claims 1 to 4, characterized in that The receiving first configuration information sent by the network device includes: Receive neighbor cell list information sent by the network device, the neighbor cell list information includes neighbor cell information of multiple cells, the neighbor cell information of each cell in the multiple cells includes configuration parameters for configuring paging of the terminal device in each cell and / or configuration parameters for random access, and the multiple cells include the target cell.

6. The method according to claim 5, characterized in that The first configuration information is set in any of the following parameter lists of neighboring cell information: NTN-NeighCellConfig-r17 in the SIB19 message of the target cell, IntraFreqNeighCellInfo in the SIB3 message of the target cell, and InterFreqNeighCellInfo in the SIB4 message of the target cell.

7. The method according to claim 5 or 6, characterized in that: The receiving the neighbor list information sent by the network device includes: Receiving neighboring cell information of the plurality of cells through a downlink beam; Alternatively, the neighboring cell information of the multiple cells is received through multiple downlink beams, and each of the multiple downlink beams notifies the neighboring cell information of at least one cell among the multiple cells.

8. A communication method, characterized in that: The method is applied to a terminal device, and the method comprises: receiving second configuration information sent by a network device, where the second configuration information is used to indicate N cells for which the terminal device needs to search for SIB1 messages when performing cell reselection; According to the second configuration information, the SIB1 messages of the N cells are searched from K cells adjacent to the source cell where the terminal device currently resides, where N is a positive integer and K is a positive integer greater than N.

9. The method according to claim 8, characterized in that The second configuration information is determined according to a priori information, where the a priori information is used to indicate a probability that each of the K cells needs to be searched for SIB1 messages.

10. The method according to claim 9, characterized in that The prior information is determined based on the orbit of the satellite corresponding to each of the K cells and the orbit of the satellite corresponding to the source cell, or based on the distance between the satellite corresponding to each of the K cells and the satellite corresponding to the source cell.

11. The method according to any one of claims 8 to 10, characterized in that The receiving the second configuration information sent by the network device includes: Receive the neighbor list information sent by the network device, where the neighbor list information includes the neighbor information of the K cells, and the neighbor information of the N cells includes indication information for indicating that a SIB1 message needs to be searched.

12. The method according to claim 11, characterized in that The second configuration information is set in any one of the following neighbor information parameter lists: NTN-NeighCellConfig-r17 in SIB19 information, IntraFreqNeighCellInfo in SIB3 information, and InterFreqNeighCellInfo in SIB4 information.

13. A communication method, characterized in that: The method is applied to a network device, and the method comprises: Determine first configuration information, where the first configuration information is used to configure configuration parameters for paging and / or random access of the terminal device in the target cell after the terminal device resides in the target cell through a cell reselection process and before searching for a system message block SIB1 message of the target cell, where the target cell is a neighboring cell of a source cell in which the terminal device is currently residing; Send the first configuration information to the terminal device.

14. The method according to claim 13, characterized in that The first configuration information includes indication information for indicating whether paging configuration parameters and / or random access configuration parameters of the target cell and the source cell are the same.

15. The method according to claim 13 or 14, characterized in that The first configuration information includes different paging configuration parameters and / or different random access configuration parameters between the target cell and the source cell.

16. The method according to claim 15, characterized in that The first configuration information includes paging configuration parameters and / or random access configuration parameters of the target cell.

17. The method according to any one of claims 13 to 16, characterized in that The sending the first configuration information to the terminal device includes: Neighbor cell list information is sent to the terminal device, the neighbor cell list information includes neighbor cell information of multiple cells, the neighbor cell information of each cell in the multiple cells includes configuration parameters for configuring paging of the terminal device in each cell and / or configuration parameters for random access, and the multiple cells include the target cell.

18. The method according to claim 17, characterized in that The first configuration information is set in any of the following parameter lists of neighboring cell information: NTN-NeighCellConfig-r17 in the SIB19 message of the target cell, IntraFreqNeighCellInfo in the SIB3 message of the target cell, and InterFreqNeighCellInfo in the SIB4 message of the target cell.

19. The method according to claim 17 or 18, characterized in that The sending the neighbor list information to the terminal device comprises: Sending neighbor list information to the terminal device through a downlink beam; Alternatively, the neighbor list information is sent to the terminal device via multiple downlink beams, and each of the multiple downlink beams notifies the neighbor information of at least one cell among the multiple cells.

20. A communication method, characterized in that: The method is applied to a network device, and the method comprises: Determine second configuration information, where the second configuration information is used to indicate, when the terminal device performs cell reselection, N cells that need to search for SIB1 messages among K cells adjacent to the source cell where the terminal device currently resides, where N is a positive integer and K is a positive integer greater than N; Send the second configuration information to the terminal device.

21. The method according to claim 20, characterized in that Determining the second configuration information includes: The second configuration information is determined according to a priori information, where the a priori information is used to indicate a probability that each of the K cells needs to be searched for SIB1 messages.

22. The method according to claim 21, characterized in that Before determining the second configuration information, the method further includes: The prior information is determined according to an orbit of a satellite corresponding to each of the K cells and an orbit of a satellite corresponding to the source cell, or a distance between a satellite corresponding to each of the K cells and a satellite corresponding to the source cell.

23. The method according to any one of claims 20 to 22, characterized in that The sending the second configuration information to the terminal device comprises: Neighbor cell list information is sent to the terminal device, where the neighbor cell list information includes neighbor cell information of the K cells, and the neighbor cell information of the N cells includes indication information for indicating that a SIB1 message needs to be searched.

24. The method according to claim 23, characterized in that The second configuration information is set in any one of the following neighbor information parameter lists: NTN-NeighCellConfig-r17 in SIB19 information, IntraFreqNeighCellInfo in SIB3 information, and InterFreqNeighCellInfo in SIB4 information.

25. The method according to any one of claims 1 to 24, characterized in that The method is applied to a transparent forwarding scenario and / or a regeneration mode scenario of satellite communication.

26. A communication device, characterized in that: The device comprises: a unit for executing the method according to any one of claims 1 to 12, or a unit for executing the method according to any one of claims 13 to 24.

27. A communication device, characterized in that: The device comprises a processor, wherein the processor is configured to, by executing a computer program or an instruction, cause the communication device to perform the method according to any one of claims 1 to 12, or cause the communication device to perform the method according to any one of claims 13 to 24.

28. A communication system, characterized in that: Including network equipment and terminal equipment; The network device is used to perform the method according to any one of claims 1 to 12; The terminal device is used to execute the method according to any one of claims 13 to 24.

29. A computer-readable storage medium, characterized in that: The computer readable storage medium stores a computer program or instruction. When the computer program or instruction is executed on a computer, so that the method of any one of claims 1 to 12 is performed; or, The method according to any one of claims 13 to 24 is performed.

30. A computer program product, characterized in that Contains instructions that, when executed on a computer, so that the method of any one of claims 1 to 12 is performed; or, The method according to any one of claims 13 to 24 is performed.

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