# US 2018/0324757 A1 · Method for processing system message, network device, and user terminal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0324757 A1 - Document ID: US20180324757A1 - Status: Published application - Kind: A1 - Application number: 16/040,156 - Filed: 2018-07-19 - Published: 2018-11-08 - Earliest claimed: 2016-01-22 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Li CHAI; Jian ZHANG; Wei QUAN - Web page: https://patentgrep.com/patent/US20180324757A1 ## CPC - H04W 68/02: Arrangements for increasing efficiency of notification or paging channel - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04W 48/12: using downlink control channel - H04W 56/00: Synchronisation arrangements - H04W 56/001: {Synchronization between nodes} - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04W 88/023: {with message or information receiving capability} - H04W 4/90: Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Example methods for processing a system message and network devices are described herein. One example method includes obtaining, by a user terminal, indication information, wherein the indication information indicates that a system message of a cell cluster has changed or whether a system message of a cell cluster has changed, wherein the cell cluster comprises a set of at least one cell. The user terminal can then determine whether currently used information about the cell cluster needs to be updated. In some instances, obtaining the indication information comprises obtaining a system information update message. In those instances, determining whether currently used information about the cell cluster needs to be updated can include updating the currently used information about the cell cluster or updating a system message of a cell in the currently used cell cluster based on the indication information in the system information update message. ## Claims ### Claim 1 A method for processing a system message, comprising: obtaining, by a user terminal, indication information, wherein the indication information indicates that a system message of a cell cluster has changed or whether a system message of a cell cluster has changed, wherein the cell cluster comprises a set of at least one cell; and determining, by the user terminal, whether currently used information about the cell cluster needs to be updated. ### Claim 2 (depends on 1) The method according to claim 1, wherein: the indication information is carried in a system information update message; the obtaining, by a user terminal, indication information comprises: obtaining, by the user terminal, the system information update message, wherein the system information update message is a paging message, a radio resource control (RRC) message, media access control (MAC) signaling, or signaling sent by using a physical control channel or a synchronization channel; and the determining, by the user terminal, whether currently used information about the cell cluster needs to be updated comprises any one or any combination of: updating, by the user terminal, the currently used information about the cell cluster based on the indication information in the system information update message; or updating, by the user terminal, a system message of a cell in a currently used cell cluster based on the indication information in the system information update message. ### Claim 3 (depends on 1) The method according to claim 1, wherein: the indication information is carried in a system message; the obtaining, by a user terminal, indication information comprises: obtaining, by the user terminal, the system message, wherein the system message indicates a currently used cell cluster; and the determining, by the user terminal based on the indication information, whether currently used information about the cell cluster needs to be updated comprises at least one of: updating, by the user terminal, the currently used information about the cell cluster based on the indication information in the system message; or updating, by the user terminal, a system message of a cell in the currently used cell cluster based on the indication information in the system message. ### Claim 4 (depends on 3) The method according to claim 3, wherein the obtaining, by the user terminal, the system message comprises: monitoring, by the user terminal, a system message corresponding to the currently used information about the cell cluster. ### Claim 5 (depends on 1) The method according to claim 1, wherein the currently used information about the cell cluster comprises information about the cell cluster that is to be used. ### Claim 6 (depends on 1) The method according to claim 1, wherein any one or any combination of: the indication information is a received index number, of a cell cluster, configured by a network device, and wherein the user terminal reads the indication information carried in a received physical control channel that is used to schedule the system information update message; the indication information is a received radio network temporary identifier (RNTI), corresponding to a cell cluster, configured by a network device, and wherein the user terminal uses the indication information to perform a CRC operation on a physical control channel that is used to schedule the system information update message; the indication information is a received channel configuration parameter, corresponding to a cell cluster, configured by a network device, and wherein the user terminal uses the channel configuration parameter in the indication information to read a physical control/data channel of the system information update message; or the indication information is at least one of a resource location in time domain or a resource location in frequency domain at which a network device sends a system information update message corresponding to a cell cluster, and wherein the user terminal uses the resource location indicated in the indication information, to receive the system information update message. ### Claim 7 (depends on 1) The method according to claim 1, wherein the information about the cell cluster is carried in a system message, and wherein the system message that carries the information about the cell cluster is sent in any one of the following manners: broadcast, multicast, or dedicated signaling. ### Claim 8 (depends on 1) The method according to claim 1, wherein the cell cluster further has identification information. ### Claim 9 A network device, comprising: at least one processor; and a non-transitory memory, wherein the memory stores an execution instruction, the execution instruction instructing the at least one processor to: determine a cell cluster corresponding to system information that needs to be updated, wherein the cell cluster comprises a set of at least one cell; and send indication information, wherein the indication information indicates that a system message of the cell cluster has changed or whether a system message of the cell cluster has changed. ### Claim 10 (depends on 9) The network device according to claim 9, wherein the indication information indicates that a system message of a cell in the cell cluster has changed or whether a system message of a cell in the cell cluster has changed. ### Claim 11 (depends on 9) The network device according to claim 9, wherein the indication information is carried in any one or any combination of the following messages: a system message, or a system information update message, wherein the system information update message is a paging message, a radio resource control (RRC) message, media access control (MAC) signaling, or signaling sent by using a physical control channel or a synchronization channel. ### Claim 12 (depends on 9) The network device according to claim 9, wherein: the indication information is an index number, of a cell cluster, configured by the network device, and wherein the network device adds the indication information to a physical control channel that is to be sent and used to schedule the system information update message; the indication information is a radio network temporary identifier (RNTI), corresponding to a cell cluster, configured by the network device, and wherein when sending a physical control channel that is used to schedule the system information update message, the network device uses the indication information to perform a cyclic redundancy check (CRC) operation; the indication information is a channel configuration parameter, corresponding to a cell cluster, configured by the network device, and wherein the network device uses the channel configuration parameter in the indication information to configure a physical control/data channel of the system information update message; or the indication information is at least one of a resource location in time domain or a resource location in frequency domain at which a system information update message corresponding to a cell cluster is sent, and wherein the network device uses the resource location indicated in the indication information, to send the system information update message. ### Claim 13 A terminal device, comprising: at least one processor; and a non-transitory memory, wherein the memory stores an execution instruction, wherein the execution instruction instructs the at least one processor to: obtain indication information, wherein the indication information indicates that a system message of a cell cluster has changed or whether a system message of a cell cluster has changed, the cell cluster comprises a set of at least one cell; and determine whether currently used information about the cell cluster needs to be updated. ### Claim 14 (depends on 13) The terminal device according to claim 13, wherein: the indication information is carried in a system information update message; the obtaining indication information comprises: obtaining the system information update message, wherein the system information update message is a paging message, a radio resource control (RRC) message, media access control (MAC) signaling, or signaling sent by using a physical control channel or a synchronization channel; and the determining whether currently used information about the cell cluster needs to be updated comprises any one or any combination of: updating the currently used information about the cell cluster based on the indication information in the system information update message; or updating a system message of a cell in a currently used cell cluster based on the indication information in the system information update message. ### Claim 15 (depends on 13) The terminal device according to claim 13, wherein: the indication information is carried in a system message; the obtaining indication information comprises: obtaining the system message, wherein the system message indicates a currently used cell cluster; and the determining based on the indication information, whether currently used information about the cell cluster needs to be updated comprises any one or any combination of: updating the currently used information about the cell cluster based on the indication information in the system message; or updating a system message of a cell in the currently used cell cluster based on the indication information in the system message. ### Claim 16 (depends on 15) The terminal device according to claim 15, wherein the obtaining the system message comprises: monitoring a system message corresponding to the currently used information about the cell cluster. ### Claim 17 (depends on 13) The terminal device according to claim 13, wherein the currently used information about the cell cluster comprises information about the cell cluster that is to be used. ### Claim 18 (depends on 13) The terminal device according to claim 13, wherein the obtaining indication information further comprises: the indication information is a received index number, of a cell cluster, configured by a network device, and wherein the user terminal reads the indication information carried in a received physical control channel that is used to schedule the system information update message; the indication information is a received radio network temporary identifier (RNTI), corresponding to a cell cluster, configured by a network device, and wherein the user terminal uses the indication information to perform a CRC operation on a physical control channel that is used to schedule the system information update message; the indication information is a received channel configuration parameter, corresponding to a cell cluster, configured by a network device, and wherein the user terminal uses the channel configuration parameter in the indication information to read a physical control/data channel of the system information update message; or the indication information is at least one of a resource location in time domain or a resource location in frequency domain at which a network device sends a system information update message corresponding to a cell cluster, and wherein the user terminal uses the resource location indicated in the indication information, to receive the system information update message. ### Claim 19 (depends on 13) The terminal device according to claim 13, wherein the information about the cell cluster is carried in a system message, and wherein the system message that carries the information about the cell cluster is sent in any one of the following manners: broadcast, multicast, or dedicated signaling. ### Claim 20 (depends on 13) The terminal device according to claim 13, wherein the cell cluster further has identification information.