Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus. The communication method comprises: a network device determines first configuration information, the first configuration information being used for configuring configuration parameters for paging and / or random access of a terminal device in a destination cell after the terminal device camps on the destination cell by means of a cell reselection process and before a system information block (SIB1) message of the destination cell is found; the network device sends the first configuration information to the terminal device; and after the terminal device camps on the destination cell by means of the cell reselection process and before the SIB1 message of the destination cell is found, on the basis of the first configuration information, the terminal device receives paging of the terminal device in the destination cell and / or initiates random access of the terminal device in the destination cell. By means of the method of the embodiments of the present application, the user service experience during cell reselection of the terminal device can be improved.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on September 27, 2023, with application number 202311272468.1 and invention name “A Communication Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of communications, and in particular to a communication method and a communication device. Background Art

[0003] During cell reselection, after a terminal device resides in a cell, it may need to switch to another cell with a higher priority or better signal as the terminal device moves or, in the case of NTN scenarios, the satellite moves. Currently, after a terminal device triggers cell reselection, it detects the synchronization signal and PBCH block (SSB) messages of the neighboring cell. It then detects the system information block 1 (SIB1) messages of the neighboring cell and locates the target cell based on the cell reselection rules. A "neighboring cell" is a cell adjacent to the source cell currently accessed by the terminal device.

[0004] However, at present, in the process of reselecting the target cell to be resided or detecting the SIB1 message in the above-mentioned cell reselection, there is a problem of poor user service experience of the terminal device.

[0005] Summary of the Invention

[0006] 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.

[0007] In the 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 be executed by a module (such as a chip or circuit) in the terminal device, or it can be executed by a logical node, logical module or software that can realize all or part of the functions of the terminal device. This application does not limit this.

[0008] The method includes: receiving first configuration information sent by a network device, where the first configuration information is used to configure configuration parameters for paging and / or random access of the terminal device in a destination cell, where the destination cell is an adjacent cell of a source cell where 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.

[0009] 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 based on 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.

[0010] However, during the period after the terminal device resides in the destination cell and before it searches for the SIB1 message of the destination cell, the terminal device does not have the paging and access parameter configuration of the destination cell, and is therefore unable to accept paging or initiate access. In other words, before the terminal device resides in the destination 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 destination cell, the paging or access parameter configuration of the destination 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.

[0011] Therefore, specifically, in the communication method shown in the first aspect, during the time period after the terminal device resides in the destination cell and before searching for the SIB1 message of the destination cell, the configuration information of the paging and / or random access within the time period can be determined based on the first configuration information sent by the network device, and the paging of the terminal device in the destination cell can be received and / or random access of the terminal device in the destination cell can be initiated within the time period.

[0012] The first configuration information may be indication information indicating determination of paging and access parameter configuration, or may be configuration parameters related to the paging process and / or 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 opportunity (RACH occasion, RO), a root sequence number of a preamble, etc.

[0013] Optionally, the random access configuration parameters may further 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, and the dedicated random access configuration parameters may include the number of non-dedicated random access preambles or the configuration of a preamble group.

[0014] Through the above method, the terminal device can receive paging or initiate access during the period after the terminal device camps on the target cell and before searching for the SIB1 message of the target cell. In this way, when using the terminal device, the user will not encounter the problem of being unable to receive paging or initiate access during certain periods of time due to cell reselection of the terminal device, thereby improving the user service experience of the terminal device.

[0015] 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, according to the first configuration information, receiving the paging of the terminal device in the destination cell and / or initiating random access of the terminal device in the destination cell, 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.

[0016] It should be understood that the value of the indication information in the first configuration information can be true or false. If the value is true, the paging configuration parameters and / or random access configuration parameters of the destination cell are the same as those of the source cell. If the value is false, the paging configuration parameters and / or random access configuration parameters of the destination cell are different from those of the source cell. 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-mentioned time period.

[0017] Specifically, during the cell reselection process 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 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 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 time period.

[0018] 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.

[0019] 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 source cell and the destination cell have the same paging cycle but different paging channel configurations, the first configuration information received by the terminal device may only include the paging channel configuration. During the above time period, the terminal device may default to the paging cycle being the same as that of the source cell. 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.

[0020] 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.

[0021] In combination with the first aspect, in certain implementations of the first aspect, receiving the first configuration information sent by the 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 the paging of the terminal device in each cell and / or configuration parameters for random access, and the multiple cells include the destination cell.

[0022] 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.

[0023] In combination with the first aspect, in certain implementations of the first aspect, the first configuration information is set in any one of the following parameter lists of 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] Specifically, the cell reselection process can be triggered by satellite movement in an NTN scenario. In a transparent forwarding scenario of satellite communications, the satellite only performs frequency conversion forwarding; in a regenerative mode scenario of satellite communications, the satellite may include network equipment such as base stations or distributed units.

[0028] On the 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 be executed by a module (such as a chip or circuit) in the terminal device, or it can be executed by a logical node, logical module or software that can realize all or part of the functions of the terminal device. This application does not limit this.

[0029] 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 located, where N is a positive integer and K is a positive integer greater than N.

[0030] 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 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-mentioned 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.

[0031] Specifically, in the communication method described in the second aspect, the second configuration information indicates some of the multiple neighboring cells, and these neighboring cells require a SIB1 message search. In other words, the second configuration information includes the neighboring cells that have been screened out and require a SIB1 message search. Thus, the terminal device only needs to search for SIB1 messages from the neighboring cells indicated in the second configuration information, and does not need to search for SIB1 messages from all neighboring cells.

[0032] 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 shortening the period of searching for SIB1 messages, thereby improving the user service experience of the terminal device during cell reselection.

[0033] In combination with the second aspect, in certain implementations of the second 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.

[0034] 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.

[0035] 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 the 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.

[0036] Specifically, the second configuration information may be included in the neighboring cell list information. For example, a new indication parameter may be added to the neighboring 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 cell's indication parameter is true, the cell needs to be searched for SIB1 messages. Alternatively, a new cell list or configuration file may be added to the neighboring cell list information to display only the cells that need to be searched for SIB1 messages.

[0037] 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.

[0038] In combination with the second aspect, in certain implementations of the second aspect, the second configuration information is set in the 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.

[0039] 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 realize all or part of the functions of the network device. This application does not limit this.

[0040] The method includes: determining first configuration information, which is used to configure the configuration parameters of the terminal device's paging and / or random access in the destination cell after the terminal device resides in the destination cell through a cell reselection process and before searching for the system message block SIB1 message of the destination cell, and the destination cell is an adjacent cell of the source cell in which the terminal device is currently residing; and sending the first configuration information to the terminal device.

[0041] 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 during the period after the terminal device camps on the target cell and before searching for the SIB1 message of the target cell. In this way, when using the terminal device, the user will not encounter the problem of being unable to receive paging or initiate access during certain periods of time due to cell reselection of the terminal device, thereby improving the user service experience of the terminal device.

[0042] In combination with the third aspect, in certain implementations of the third 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 and the source cell are the same.

[0043] 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.

[0044] 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.

[0045] 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 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 the paging of the terminal device in each cell and / or configuration parameters for random access, and the multiple cells include the destination cell.

[0046] In combination with the third aspect, in certain implementations of the third aspect, the first configuration information is set in any one of the following parameter lists of 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.

[0047] 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.

[0048] In combination with the third aspect, in certain implementations of the third aspect, sending neighbor list information to the terminal device includes: sending neighbor list information to the terminal device through a downlink beam; or, sending 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.

[0049] 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 content 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.

[0050] 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 realize all or part of the functions of the network device. This application does not limit this.

[0051] The method includes: determining second configuration information, which is used to indicate, when the terminal device performs cell reselection, N cells among K cells adjacent to the source cell where the terminal device is currently located, in which SIB1 messages need to be searched, 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.

[0052] 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.

[0053] 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 prior information, where the prior information is used to indicate a probability that each of the K cells needs to be searched for SIB1 messages.

[0054] Specifically, the prior information may be a ranking of the probabilities of the K cells needing to be searched for SIB1 messages, or a specific numerical value of the probabilities of the K cells indicated by the network device. Optionally, the network device may, based on a preset probability threshold, arrange cells whose probabilities of needing to be searched for SIB1 messages are higher than the probability threshold in the second configuration information.

[0055] 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.

[0056] For example, if the distance between the satellite corresponding to the neighboring cell and the satellite corresponding to the source cell is close, the network device may determine that the probability that the neighboring cell needs to be detected for SIB1 messages is high. Conversely, if the distance between the satellite corresponding to the neighboring cell and the satellite corresponding to the source cell is close, the network device may determine that the probability that the neighboring cell needs to be detected for SIB1 messages is low. For another example, the network device may 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.

[0057] 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 list information to the terminal 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.

[0058] In combination with the fourth aspect, in certain implementations of the fourth aspect, the second configuration information is set in the 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.

[0059] 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.

[0060] 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.

[0061] In a fifth aspect, a communication device is provided, which includes: a transceiver unit for receiving first configuration information sent by a network device, where the first configuration information is used to configure configuration parameters for paging and / or random access of the terminal device in a destination cell, where the destination cell is an adjacent cell of a source cell where 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.

[0062] 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.

[0063] 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 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.

[0064] 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.

[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 neighbor list information sent by the network device, and the neighbor list information includes neighbor information of multiple cells, and the neighbor information of each cell in the multiple cells includes configuration parameters for configuring the paging of the terminal device in each cell and / or configuration parameters for random access, and the multiple cells include the destination cell.

[0066] In combination with the fifth and sixth aspects, 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.

[0067] 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.

[0068] The explanation and beneficial effects of the communication device provided in the fifth aspect can refer to the communication method shown in the first aspect and will not be repeated here.

[0069] In the sixth aspect, a communication device is provided, which includes: a transceiver unit for receiving second configuration information sent by a network device, wherein the second configuration information is used to indicate that the terminal device needs to search N cells for SIB1 messages when performing cell reselection; a processing unit for searching for SIB1 messages of the N cells from K cells adjacent to the source cell where the terminal device is currently located according to the second configuration information, wherein N is a positive integer and K is a positive integer greater than N.

[0070] 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.

[0071] 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.

[0072] In combination with the sixth aspect, in certain implementations of the sixth aspect, the transceiver unit is specifically used to receive the neighbor list information sent by the network device, 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 the need to search for SIB1 messages.

[0073] 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.

[0074] In combination with the sixth aspect, in certain implementations of the sixth aspect, the second configuration information is set in any one of the following parameter lists of neighboring cell information: NTN-NeighCellConfig-r17 in SIB19 information, IntraFreqNeighCellInfo in SIB3 information, and InterFreqNeighCellInfo in SIB4 information.

[0075] The explanation and beneficial effects of the communication device-related contents provided in the sixth aspect can refer to the paging method shown in the second aspect and will not be repeated here.

[0076] In the seventh aspect, a communication device is provided, which includes: a processing unit for determining 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 destination cell after the terminal device resides in the destination cell through the cell reselection process and before searching for the system message block SIB1 message of the destination cell, and the destination cell is an adjacent cell of the source cell in which the terminal device is currently residing; a transceiver unit for sending the first configuration information to the terminal device.

[0077] 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 and the source cell are the same.

[0078] 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.

[0079] 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 destination cell.

[0080] 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 the paging of the terminal device in each cell and / or configuration parameters for random access, and the multiple cells include the destination cell.

[0081] In combination with the seventh aspect, in certain implementations of the seventh aspect, the first configuration information is set in any one of the following parameter lists of 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.

[0082] 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.

[0083] 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.

[0084] The explanation and beneficial effects of the communication device-related contents provided in the seventh aspect can be referred to the paging method shown in the third aspect, and will not be repeated here.

[0085] In the eighth aspect, a communication device is provided, which includes: a processing unit for determining second configuration information, wherein the second configuration information is used to indicate, when the terminal device performs cell reselection, N cells among the K adjacent cells of the source cell where the terminal device is currently located, in which SIB1 messages need to be searched, where N is a positive integer and K is a positive integer greater than N; and a transceiver unit for sending the second configuration information to the terminal device.

[0086] 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.

[0087] 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.

[0088] In combination with the eighth aspect, in certain implementations of the eighth aspect, the above-mentioned transceiver unit is specifically used to: send neighbor list information to the terminal device, 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 the need to search for SIB1 messages.

[0089] In combination with the eighth aspect, in certain implementations of the eighth aspect, the second configuration information is set in any one of the following parameter lists of neighboring cell information: NTN-NeighCellConfig-r17 in SIB19 information, IntraFreqNeighCellInfo in SIB3 information, and InterFreqNeighCellInfo in SIB4 information.

[0090] 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.

[0091] The explanation and beneficial effects of the paging device provided in the eighth aspect can be referred to the paging method shown in the fourth aspect, and will not be repeated here.

[0092] In the 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 possible embodiment of the first aspect; or enable the communication device to perform the method described in the second aspect and any possible embodiment of the second aspect; enable the communication device to perform the method described in the third aspect and any possible embodiment of the third aspect; or enable the communication device to perform the method described in the fourth aspect and any possible embodiment of the fourth aspect.

[0093] In a possible implementation, the communication device further includes a memory for storing the computer program or instruction.

[0094] In a possible implementation, the communication device further includes a communication interface, which is used to input and / or output signals.

[0095] 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 possible embodiment of the first aspect; or, the logic circuit being used to execute the method described in the second aspect and any possible embodiment of the second aspect; the logic circuit being used to execute the method described in the third aspect and any possible embodiment of the third aspect; or, the logic circuit being used to execute the method described in the fourth aspect and any possible embodiment of the fourth aspect.

[0096] 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.

[0097] 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 possible embodiment of the first aspect to be executed; or, cause the method described in the second aspect and any possible embodiment of the second aspect to be executed; cause the method described in the third aspect and any possible embodiment of the third aspect to be executed; or, cause the method described in the fourth aspect and any possible embodiment of the fourth aspect to be executed.

[0098] 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, second aspect and any possible method of the first aspect and second aspect, and the network device is used to execute the method described in the above-mentioned third aspect, fourth aspect and any possible method of the third aspect and fourth aspect.

[0099] 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

[0100] FIG1 is a schematic diagram of a communication system applicable to an embodiment of the present application.

[0101] FIG2 is a schematic diagram of a satellite communication system applicable to an embodiment of the present application.

[0102] FIG3 is a schematic diagram of a cell reselection process applicable to an embodiment of the present application.

[0103] FIG4 is a schematic diagram of another cell reselection process applicable to an embodiment of the present application.

[0104] FIG5 is a schematic flowchart of a communication method applicable to an embodiment of the present application.

[0105] FIG6 is a schematic diagram of first configuration information applicable to an embodiment of the present application.

[0106] FIG7 is a schematic diagram of another type of first configuration information applicable to an embodiment of the present application.

[0107] FIG8 is a schematic diagram of another first configuration information applicable to an embodiment of the present application.

[0108] FIG9 is a schematic diagram of neighbor list information applicable to an embodiment of the present application.

[0109] FIG10 is a schematic diagram of the correspondence between a downlink beam and neighboring cell information applicable to an embodiment of the present application.

[0110] FIG11 is a schematic flowchart of another communication method applicable to an embodiment of the present application.

[0111] FIG12 is a schematic diagram of another type of neighbor list information applicable to an embodiment of the present application.

[0112] FIG13 is a schematic block diagram of a communication device applicable to an embodiment of the present application.

[0113] FIG14 is a schematic block diagram of another communication device applicable to an embodiment of the present application.

[0114] FIG15 is a schematic block diagram of another communication device applicable to an embodiment of the present application. DETAILED DESCRIPTION

[0115] The technical solution in this application will be described below with reference to the accompanying drawings.

[0116] In order to facilitate understanding of the embodiments of the present application, the following points are first explained.

[0117] 1. In this application, unless otherwise specified, "plurality" means two or more.

[0118] 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 by each other. The technical features in different embodiments can be combined to form new embodiments based on their internal logical relationships.

[0119] 3. The various numerical 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 order of execution 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.

[0120] At the same time, any embodiment or design described in this 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 the relevant concepts in a concrete manner to facilitate understanding.

[0121] 4. The terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes 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.

[0122] 5. In this application, "pre-defined" may include pre-defined, such as protocol definition. "Pre-defined" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in the device. This application does not limit the specific implementation method.

[0123] 6. "Storage" or "saving" as used in this application may refer to storage in one or more memories. The one or more memories may be provided separately or integrated into an encoder or decoder, a processor, or a communication device. The one or more memories may also be partially provided separately and partially integrated into a decoder, processor, or communication device. The type of memory may be any form of storage medium and is not limited thereto.

[0124] 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 mean A or B. “And / or” in this application is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural.

[0125] First, with reference to FIG1 and FIG2 , a communication system applicable to the embodiment of the present application is described.

[0126] The technical solutions provided in this application can be applied to various communication systems, such as: fifth generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, universal mobile telecommunication systems (UMTS), etc. The technical solutions provided in this application can also be applied to future communication systems, such as sixth generation (6G) mobile communication systems. The technical solutions 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 systems, non-terrestrial network (NTN) communication systems or other communication systems.

[0127] It should be understood that the embodiments of the present application do not specifically 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 can be a terminal or a network device, or a functional module in the UE or network device that can call and execute the program.

[0128] As an example, Figure 1 shows a schematic architecture diagram of a communication system. For example, the architecture may include terminal devices, access network (AN) devices, core network (CN), external networks, etc. The external network may be a data network (DN), and the access network devices refer to the radio access network (RAN) devices provided in this application.

[0129] Terminal device: can be referred to as 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 device of this application can also be a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminal devices include: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), 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 (PDAs), handheld devices with wireless communication capabilities, 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 networks (PLMNs), etc. The embodiments of the present application are not limited to this.

[0130] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called 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 achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those 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 smart bracelets and smart jewelry for vital sign monitoring.

[0131] It should be noted that the terminal device and the access network device can communicate with each other using a certain air interface technology (such as but not limited to NR or LTE technology). The terminal devices can also communicate with each other using a certain air interface technology (such as but not limited to NR or LTE technology).

[0132] In the embodiments of the present application, the device for implementing the function of the terminal device can be the terminal device, or it can be a device that can support the terminal device to implement the function, such as a chip system or chip, which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0133] Access network equipment: Also known as RAN nodes, RAN equipment, etc. RANs provide access to communications networks for authorized users in a specific area. Access network equipment can include wireless network equipment in 3rd Generation Partnership Project (3GPP) networks, as well as access points in non-3GPP networks. For ease of description, the term "access network (AN) equipment" will be used below.

[0134] Access network equipment can adopt different wireless access technologies. There are two types of wireless access technologies at present: 3GPP access technology (for example, the wireless access technology adopted in the third generation (3G), fourth generation (4G) or 5G systems) and 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 Node Base station (gNB) node or RAN equipment. Non-3GPP access technologies may include air interface technologies represented by access points (APs) in wireless fidelity (WiFi), worldwide interoperability for microwave access (WiMAX), code division multiple access (CDMA), etc. Access network equipment can allow terminal devices and the 3GPP core network to interconnect and communicate using non-3GPP technologies.

[0135] Access network equipment is responsible for radio resource management, quality of service (QoS) management, data compression and encryption, and other functions on the air interface side. It provides access services to terminal devices and forwards control signals and user data between terminal devices and the core network.

[0136] Access network equipment may include, but is not limited to: a macro base station, a micro base station (also known as a small station), a radio network controller (RNC), a node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., a home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), an AP in a WiFi system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc. It can also be a gNB or transmission point (TRP or TP) in a 5G (e.g., NR) system, one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system, or a network node constituting a gNB or transmission point, such as a distributed unit (DU), or a base station in a next-generation communication 6G system. The embodiments of the present application do not limit the specific technology and specific device form adopted by the AN device.

[0137] Core Network: Responsible for user access control, mobility management, session management, user authentication, and billing. It consists of multiple functional units, divided into control plane and data plane functional entities. 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 user plane data transmission, traffic statistics, and other functions. The session management function (SMF) network element is primarily responsible for control plane functions such as user session management.

[0138] In an embodiment of the present application, when the distance between the access network device and the terminal device is relatively long, the application scenario of the communication system shown in Figure 1 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 to the terminal device. 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 terrestrial cellular networks are difficult to fully cover, such as Gobi, deserts, oceans, remote mountainous areas, etc. It can also be applied to scenarios where terrestrial cellular networks are destroyed after natural disasters such as floods and earthquakes that damage terrestrial infrastructure, to provide reliable network services to end users. The NTN communication system can be deployed independently or as a supplement to the terrestrial network.

[0139] For example, Figure 2 is a 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. The various network elements in Figure 2 and the interfaces between the network elements are described as follows:

[0140] 5G New Air Interface: The wireless link between terminal devices and 5G access network equipment.

[0141] Terminal device: A mobile device that supports the 5G new air interface, typically a mobile phone, tablet, or other mobile terminal device. It can access the satellite network through the air interface and initiate calls, access the Internet, and other services. For details, refer to the description of terminal devices above.

[0142] 5G access network equipment: mainly provides wireless access services, dispatches wireless resources to access terminals, and provides reliable wireless transmission protocols and data encryption protocols, such as base stations.

[0143] 5G core network: Provides services such as user access control, mobility management, session management, user authentication, and billing. It consists of multiple functional units, divided into control plane and data plane functional entities. The AMF network element is responsible for user access management and control, user authentication, and mobility management. The UPF network element manages user plane data transmission and traffic statistics. The SMF network element primarily handles control plane functions for terminal device session management.

[0144] Ground station: responsible for forwarding signaling and service data between 5G access network equipment and 5G core network.

[0145] Xn interface: The interface between 5G access network devices, mainly used for signaling interaction such as switching.

[0146] NG interface: The interface between 5G access network equipment and 5G core network, mainly interacting with the core network's non-access stratum (NAS) signaling and user service data.

[0147] Optionally, the satellite communications described above may include transparent forwarding or regeneration mode scenarios. For example, the two 5G access network devices shown in Figure 2 may be in transparent forwarding or regeneration mode. In the transparent forwarding scenario, the satellite serving as the 5G access network device only performs frequency conversion forwarding. In the regeneration mode scenario, the satellite serving as the 5G access network device may include the aforementioned gNB device or DU.

[0148] 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 apart, and the present application is not limited to the satellite communication scenario shown in FIG. 2 .

[0149] The following describes the existing cell reselection process and existing technical problems.

[0150] The cell reselection process is different from the cell selection process. Cell selection refers to the process in which a terminal device searches for a cell when it is powered on or experiences a radio link failure, quickly selecting a suitable cell to reside in. Cell reselection refers to the process in which, after residing in a cell, the terminal device may need to switch to a cell with a higher priority or better signal quality as the terminal device moves or the satellites in the NTN communication system move. In other words, cell selection is the process of quickly finding a suitable cell, while cell reselection is the process of selecting a more suitable cell. For example, if the cell diameter is 50 km and the low-orbit satellite moves at a speed of 7.56 km / s, the terminal device will need to complete a cell reselection every approximately 6 seconds due to satellite movement. The cell in which the terminal device resides refers to the serving cell currently being used by the terminal device—that is, the cell in which the terminal device has established a connection with the network and is transmitting data.

[0151] For example, the cell selection process 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 rxlevmeasQ refers to the received signal strength value measured by the terminal device, which is the measured reference signal received power (RSRP) (dBm); rxlevmin Refers to the minimum received signal strength value required by the cell, which can be indicated by q-RxLevMin in the cell's SIB1 message (dBm); Q rxlevminOffset It is only valid when the device is normally stationed 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 a certain bias.

[0152] After obtaining the above parameters, the terminal device can evaluate whether the cell is a suitable cell based on the S criterion. Once a suitable cell is found (i.e., a cell that meets the S criterion), 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 it finds a suitable cell and resides in it.

[0153] Meeting the S criterion means that Srxlev (S value) > 0. That is, if the S value of a cell is greater than 0, it indicates 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 for Srxlev is as follows:

[0154] Srxlev=Q rxlevmeas -(Q rxlevmin -Q rxlevminoffset )-P compensation

[0155] Among them, P compensation is max(PEMAX–PUMAX, 0) (dB), where PEMAX is the maximum allowable 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 class.

[0156] Exemplarily, the process of cell reselection may be as follows: 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). For different neighboring cells, the terminal device can evaluate them according to different reselection rules, and finally reselect a cell. When the terminal device performs measurements and cell reselection, it can use the priority information of adjacent frequencies. 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, and ensuring the signal quality of the terminal device. The measurement criteria are as follows:

[0157] For the serving cells of the 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 serving cells; if the Srxlev of the neighboring cell <= Sintrasearch (the same-frequency measurement start threshold), the terminal device starts to measure the same-frequency cells; if the Srxlev of the neighboring cell <= Snonintrasearch (the inter-frequency measurement start threshold) or Snonintrasearch is not configured, the UE starts to measure the cells of the same priority frequency or lower priority frequency and system.

[0158] After the above measurement process, the terminal device will determine whether to perform reselection to a new cell. The reselection criteria are as follows:

[0159] Reselection criteria for high-priority frequencies or systems: 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);

[0160] Reselection criteria for low-priority frequencies or systems: 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);

[0161] Reselection criteria for the same-priority frequencies or systems: The cell reselection to a cell in the same-priority frequency is based on the Ranking criteria for intra-frequency cell reselection. The intra-frequency cell reselection criteria (Ranking) are defined by the following formula:

[0162] R s = Q meas,s + Qhyst s

[0163] R n = Q meas,s - Q offset

[0164] 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 different frequencies, Q offset The value is Q offsets,n +Q offsetfrequency .

[0165] 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.

[0166] 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 there according to the cell reselection rules. The SIB1 message is cell-specific information in the LTE system, which carries the key information required for the terminal device to access the cell, including the cell ID, the operator ID (ie PLMN) to which the cell belongs, whether the cell is barred (cellBarred, this parameter tells the terminal device whether the current cell can be accessed), paging parameters and random access parameters, etc. During the cell reselection process, the terminal device needs to search and decode the SIB1 information in the neighboring cell announcement message in order to evaluate the quality of the neighboring cell and receive relevant 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 device can obtain relevant information in a timely manner and perform cell reselection when necessary to maintain communication stability and reliability.

[0167] However, during the process of the above-mentioned cell reselection to reside in the target cell or detecting the SIB1 message, there is a problem of poor user service experience of the terminal device.

[0168] For example, Figure 3 illustrates a schematic diagram of a cell reselection process 300. As shown in Figure 3, after a cell reselection condition is triggered, a terminal device measures SSB messages from multiple neighboring cells and can also simultaneously measure SIB1 messages from these multiple neighboring cells. The terminal device then locates the target cell and resides on it based on the cell reselection rules. However, during the cell reselection process, when there are a large number of neighboring cells, the terminal device needs to search for SIB1 messages from a large number of neighboring cells, resulting in significant functional overhead for the terminal device. Furthermore, in the NTN communication system scenario, due to factors such as different neighboring cells corresponding to different satellites, wireless environments, frequency band allocations, device performance, and configuration parameters, the time-frequency offset between different neighboring cells can be significant. SIB1 messages from different neighboring cells may interfere with each other, resulting in incorrect decoding by the terminal device. To separate the SIB1 information from different cells in time and frequency to avoid mutual interference, the terminal device needs to search for SIB1 messages in a timed manner, per cell. For example, the terminal device can complete the measurement of SIB1 messages from five neighboring cells by searching for at least five cycles, meaning that the terminal device's SIB1 message search period is relatively long. Therefore, due to the large power consumption and long search period of the terminal device, the user service experience of the terminal device is poor.

[0169] Exemplarily, FIG4 shows a schematic diagram of another cell reselection process 400. As shown in FIG4 , 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 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.

[0170] However, during the time period after the terminal device resides in the destination cell and before searching for the SIB1 message of the destination cell, the terminal device does not have the paging and random access parameter configuration of the destination cell, and thus cannot receive paging or initiate random access. In other words, in the steps shown in Figure 4, before the terminal device resides in the destination 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 destination cell, the terminal device can use the paging or random access parameter configuration of the destination cell in the SIB1 message; but in the intermediate time period, the terminal device does not have available paging and random access parameter configuration. In this way, when the user uses the terminal device, there will be a problem of not being able to receive paging or initiate random access in some time periods due to the terminal device cell reselection, thereby affecting the user experience.

[0171] 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.

[0172] The communication method 500 provided in an embodiment of the present application will be described below with reference to Figures 5 to 10. The communication method 500 can be used to solve the problem that a terminal device cannot receive paging or initiate random access during the cell reselection process.

[0173] FIG5 is a schematic diagram of the interaction flow of a communication method 500 according to an embodiment of the present application. The method shown in FIG5 can be executed by a terminal device and a network device, or by a module and / or device (e.g., a chip or integrated circuit, etc.) with corresponding functions installed in the terminal device and the network device, and the present application does not limit this. The network device mentioned below can be the access network device mentioned above. The following description takes the terminal device and the network device as an example. As shown in FIG5, the method 500 includes:

[0174] In 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 destination cell.

[0175] Specifically, the first configuration information may be indication information indicating the configuration of paging and / or access parameters, 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 (or the 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.

[0176] S520: The network device sends the first configuration information to the terminal device.

[0177] Optionally, the network device may directly send the first configuration information to the terminal device, or may send the first configuration information by sending neighbor list information to the terminal device, or in other words, 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 a 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.

[0178] Optionally, when the first configuration information is included in the neighbor list information, the network device may transmit neighbor information of multiple cells included in the neighbor list information through one or more downlink beams. For example, the network device may transmit neighbor information of the multiple cells through multiple downlink beams, where each downlink beam is used to notify neighbor information of at least one cell among the multiple cells.

[0179] 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 the paging of the target cell and / or initiates random access of the terminal device in the target cell according to the first configuration information.

[0180] Through the above method, the terminal device can receive paging or initiate random access in the period after camping on the target cell and before searching for the SIB1 message of the target cell. In this way, when using the terminal device, the user will not encounter the problem of being unable to receive paging or initiate random access during certain periods due to terminal device cell reselection, thereby improving the user service experience of the terminal device.

[0181] The following describes an embodiment of the first configuration information or an embodiment of step S510 in this application with reference to Figures 6 to 8.

[0182] 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. If the value is true, it means that the paging configuration parameters and / or random access configuration parameters of the destination cell and the source cell are the same; if the value is false, it means that the paging configuration parameters and / or random access configuration parameters of the destination cell and the source cell are different.

[0183] 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 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 based on the configuration parameters of the paging process and / or the configuration parameters of the random access process of the source cell.

[0184] Specifically, during the cell reselection process 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 within the above 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 within the above 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 within the above time period.

[0185] Figure 6 shows a schematic diagram of the first configuration information in the above embodiment. As shown in Figure 6, in the paging configuration parameters, the number of paging opportunities in 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 the time-frequency resource position and the leading root sequence number of the RO as shown in Figure 6) 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. In the case shown in Figure 6, after receiving the first configuration information sent by the network device, the terminal device can, according to the random access configuration parameters of the source cell, enable the terminal device to initiate random access in the destination cell within the above time period, but cannot enable the terminal device to receive paging in the destination cell.

[0186] It is worth noting that the names of the indication information pagingConfigIndicate and RACHConfigIndicate shown in FIG6 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 mentioned below is similar.

[0187] In some other embodiments of the present application, the first configuration information may be configuration parameters related to the paging process and / or random access process. For example, the first configuration information may include configuration parameters related to the paging process and / or random access process of the destination cell, that is, the network device directly sends the configuration parameters related to the paging process and / or 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 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 during the above time period, 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. 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.

[0188] Figure 7 shows a schematic diagram in which the first configuration information in the above embodiment only includes different parameters. The configuration parameters shown in Figure 7 are the same as those in Figure 6, that is, the number of paging opportunities in each paging frame of the source cell and the destination cell is the same but the paging cycles are different, and the configuration parameters of random access of the source cell and the destination cell are exactly the same. Furthermore, the network device can determine that the first configuration information only includes the paging cycle of the destination cell and its value. In the case shown in Figure 7, after receiving the first configuration information sent by the network device, the terminal device can initiate random access in the destination cell and receive paging in the destination cell within the above time period according to the paging cycle of the destination cell included in the first configuration information and the number of paging opportunities in each paging frame of the source cell and the configuration parameters of random access shown in Figure 7.

[0189] Optionally, the embodiment shown in FIG6 can be combined with the embodiment shown in FIG7. For example, when the value of at least one indication information shown in FIG6 is false, the network device can add different configuration parameters for the source cell and the destination cell shown in FIG7 to the first configuration information. FIG8 shows a schematic diagram of another first configuration information. As shown in FIG8, the value of the indication information related to paging in the first configuration information is false. The network device can add different configuration parameters for the paging process of the source cell and the destination cell to the first configuration information, such as the paging cycle and its value shown in FIG8.

[0190] The following describes an embodiment of step S520 in the present application in conjunction with Figures 9 and 10.

[0191] 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 information such as the cell's location, coverage, neighboring cell frequency, signal quality, signal strength, and cell representation. 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.

[0192] Figure 9 shows a schematic diagram of the first configuration information included in the neighbor list information. (a) in Figure 9 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 first configuration information added by the network device in the neighbor list information as shown in Figure 6. (b) in Figure 9 shows that the first configuration information can be set in the parameter list IntraFreqNeighCellInfo of the SIB3 message, and the underlined parameters are the first configuration information added by the network device in the neighbor list information as shown in Figure 7. Among them, the PCCH-Config shown in the figure can include one or more configuration parameters indicating the paging channel, and the RACH-ConfigCommon can include one or more configuration parameters indicating random access. As shown in (c) in Figure 9, the first configuration information can also be set in the parameter list InterFreqNeighCellInfo of the SIB4 message.

[0193] In the embodiment in which the above-mentioned network device sends the first configuration information through the neighbor list information, the network device can notify the neighbor information of multiple neighboring areas in the neighbor list information through only one downlink beam, or can notify the neighbor information of different neighboring areas through different downlink beams based on information such as the position of the downlink beam. Figure 10 shows a schematic diagram of a downlink beam. As shown in (a) of Figure 10, the network device can notify the neighbor information of all neighboring areas only through beam 1; as shown in (b) of Figure 10, the network device can notify the neighbor information of neighbor A through beam 2, notify the neighbor information of neighbor B and neighbor C through beam 3, and notify the neighbor information of neighbor D through beam 4, that is, each downlink beam can be used to notify the neighbor information of at least one neighboring area.

[0194] Through the above-described communication method 500, the terminal device can receive paging or initiate access during the period after the terminal device camps on the target cell and before searching for the SIB1 message of the target cell. In this way, when using the terminal device, the user will not encounter the problem of being unable to receive paging or initiate access during certain periods of time due to cell reselection of the terminal device, thereby improving the user service experience of the terminal device.

[0195] The communication method 1100 provided in an embodiment of the present application will be described below with reference to FIG11 and FIG12. The communication method 1100 can be used to solve the problems of high power consumption and long search period of the terminal device.

[0196] 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 cell reselection are triggered, 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 some neighboring cells need to be searched for SIB1 messages. In other words, the second configuration information includes the filtered neighboring cells that need to be searched 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. 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, and then the terminal device originally needed 10 cycles to search for SIB1 messages of neighboring cells, but now only needs 4 cycles to search for SIB1 messages of neighboring cells.

[0197] Figure 11 is a schematic diagram of the interaction flow of a communication method 1100 according to an embodiment of the present application. The method shown in Figure 11 can be performed by a terminal device and a network device, or by a module and / or device (e.g., a chip or 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 an example. As shown in Figure 11, the method 1100 includes:

[0198] In step S1110, the network device determines second configuration information, where the second configuration information is used to indicate N cells that need to be searched 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.

[0199] 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.

[0200] Optionally, in an embodiment of the present application, the network device may determine the second configuration information based on a priori information, where 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%. For cells with a probability of needing to be searched for SIB1 higher than 50%, the value of the above indication information corresponding to the cell is true, and for cells with a probability lower than 50%, the value of the above indication information corresponding to the cell is false, or the network device may arrange cells with a probability higher than 50% in a cell list.

[0201] 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 less than a preset distance threshold, the network device determines that there is a high probability that the neighboring cell needs to be searched for SIB1 messages. Alternatively, the network device may sort the distances between the satellites corresponding to all neighboring cells and the satellite corresponding to the source cell, and the neighboring cells with higher sorting have a higher probability of needing to be searched for SIB1 messages.

[0202] 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.

[0203] Step S1120: The network device sends the second configuration information to the terminal device.

[0204] 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 neighbor list information to the terminal device. The second configuration information can be included in a 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. Figure 12 shows a schematic diagram of the neighbor list information including the second configuration information.

[0205] As shown in (a) of Figure 12, the second configuration information includes indication information NeighborSIB1Indicate, which is used to indicate whether multiple neighboring cells need to be searched for SIB1 messages. If the value of the indication information NeighborSIB1Indicate for neighboring cell A is true, and the value of the indication information NeighborSIB1Indicate for neighboring cell B is false, then neighboring cell A needs to be searched for SIB1 messages. Upon receiving the neighboring cell information of neighboring cell A in the neighboring cell list information, the terminal device can search for SIB1 messages of neighboring cell A based on the indication information of neighboring cell A.

[0206] As shown in (b) of Figure 12, the second configuration information may also include a list of cells that need to be searched for SIB1 messages, which is compiled 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 compiled list of cells (including cells A and D, etc.) to the terminal device.

[0207] Step S1130: The terminal device searches for SIB1 messages of the N cells from the K cells adjacent to the currently resident source cell according to the second configuration information.

[0208] By using 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 shortening the period of the cell's simultaneous search for SIB1 messages.

[0209] Finally, the device embodiment of the embodiment of the present application is introduced.

[0210] To implement the various functions of the methods provided herein, both terminal devices and network devices may include hardware structures and / or software modules, with the aforementioned functions implemented in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Whether a particular function is implemented in the form of hardware structures, software modules, or a combination of hardware structures and software modules depends on the specific application and design constraints of the technical solution.

[0211] Figure 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, which may be interconnected via a bus 1330. The communication device 1300 may be a network device or a terminal device.

[0212] Optionally, the communication device 1300 may further include a memory 1340. The memory 1340 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or portable read-only memory (CD-ROM), and is used for related instructions and data.

[0213] The processor 1310 may be one or more central processing units (CPUs). In the case where the processor 1310 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0214] When the communication apparatus 1300 is a terminal device, illustratively, the communication apparatus 1300 is configured to perform the following operations: receiving first configuration information sent by a network device, etc.

[0215] 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 the terminal device, etc.

[0216] The above contents are merely 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.

[0217] The above description is merely exemplary. For details, please refer to the contents of the above method embodiments. The implementation of each operation in FIG13 may also correspond to the corresponding description of the method embodiments shown in FIG5 and FIG11.

[0218] Figure 14 is a schematic block diagram of a communication device 1400 according to an embodiment of the present application. Communication device 1400 may be a network device or terminal device, or a chip or module within the network device or terminal device, configured to implement the methods described in the above embodiments. Communication device 1400 includes a transceiver unit 1410 and a processing unit 1420. The following provides an exemplary description of transceiver unit 1410 and processing unit 1420.

[0219] The transceiver unit 1410 may include a transmitting unit and a receiving unit. The transmitting unit is configured to execute a transmitting operation of the communication device, and the receiving unit is configured to execute a receiving operation of the communication device. For ease of description, this embodiment of the application combines the transmitting unit and the receiving unit into a single transceiver unit. This is described here as a unified description and will not be repeated later.

[0220] 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 the destination cell and / or initiate random access of the terminal device in the destination cell according to the first configuration information.

[0221] 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.

[0222] The above contents are merely 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.

[0223] Optionally, the communication device 1400 further includes a storage unit 1430, which is used to store a program or code for executing the aforementioned method.

[0224] The device embodiments shown in Figures 13 and 14 are used to implement the contents described in Figures 5 to 12. The specific execution steps and methods of the devices shown in Figures 13 and 14 can refer to the contents described in the above method embodiments.

[0225] Figure 15 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 the network device / terminal device.

[0226] Communication device 1500 includes an input / output interface 1520 and a processor 1510. Input / output interface 1520 may be an input / output circuit. Processor 1510 may be a signal processor, a chip, or other integrated circuit capable of implementing the method of the present application. Input / output interface 1520 is used for inputting or outputting signals or data.

[0227] For example, when the communication apparatus 1500 is a terminal device, the input / output interface 1520 is configured to receive first configuration information from the network device. The processor 1510 is configured to receive 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.

[0228] For example, the communication device 1500 is a network device, the processor 1510 is configured to determine the first configuration information, and the input / output interface 1520 is configured to send the first configuration information to the terminal device.

[0229] 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.

[0230] Optionally, the communication device 1500 further includes a memory.

[0231] Optionally, the processor and memory are integrated together.

[0232] Optionally, the memory is outside the communication device 1500 .

[0233] In one possible implementation, the processor 1510 may be a logic circuit, which 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 application.

[0234] The above description of the communication device 1500 is merely an exemplary description. The communication device 1500 can be used to execute the method described in the above embodiments. For details, please refer to the description of the above method embodiments, which will not be repeated here.

[0235] 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.

[0236] The present application also provides a chip, comprising: 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 configured to execute code in a memory. When the code is executed, the processor is configured to execute the methods in the above examples. Optionally, the chip also includes a memory, which is configured to store computer programs or code.

[0237] The present application also provides a processor for coupling with a memory, and for executing the methods and functions involving a network device or a terminal device in any of the above embodiments.

[0238] The present application provides a computer program product comprising instructions. When the computer program product is run on a computer, the method of the aforementioned embodiment is implemented.

[0239] The present application also provides a computer program. When the computer program is executed in a computer, the method of the aforementioned embodiment is implemented.

[0240] 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.

[0241] Those skilled 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 beyond the scope of this application.

[0242] Those skilled in the art will 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.

[0243] In the several embodiments provided in this 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. In actual implementation, there may be other division methods, such as 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.

[0244] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the technical solutions of the embodiments of the present application.

[0245] 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.

[0246] 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, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute 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 a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0247] The above description is merely a specific embodiment of the present application, but the scope of protection of the embodiments of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the embodiments of the present application should be included in the scope of protection of the embodiments of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection 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 that 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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