# US 2018/0027392 A1 · Multi-Group Call Setup Method and Device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0027392 A1 - Document ID: US20180027392A1 - Status: Published application - Kind: A1 - Application number: 15/722,642 - Filed: 2017-10-02 - Published: 2018-01-25 - Earliest claimed: 2015-04-09 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Yanmei Yang; Yizhuang Wu; Cuili Ge - Web page: https://patentgrep.com/patent/US20180027392A1 ## CPC - H04W 4/08: User group management - H04L 12/18: for broadcast or conference {, e.g. multicast} - H04W 4/10: Push-to-Talk [PTT] or Push-On-Call services - H04W 76/45: for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services - H04W 84/08: Trunked mobile radio systems - 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) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A multi-group call setup method and device are disclosed. The method includes determining, by a first MCPTT server, to set up a multi-group call involving N MCPTT groups, where N is an integer greater than or equal to 2, and sending, by the first MCPTT server, a call message to first UE, where the call message is used to add the first UE to the multi-group call, where a first MCPTT user is an associated user of the first UE, and where the first MCPTT user is an MCPTT user in the N MCPTT groups. ## Claims ### Claim 1 A multi-group call setup method, comprising: determining, by a first mission critical push to talk (MCPTT) server, to set up a multi-group call involving N MCPTT groups, wherein N is an integer greater than or equal to 2; and sending, by the first MCPTT server, a call message to a first user equipment (UE), wherein the call message is used to add the first UE to the multi-group call, wherein a first MCPTT user is an associated user of the first UE, and wherein the first MCPTT user is an MCPTT user in the N MCPTT groups. ### Claim 2 (depends on 1) The method according to claim 1, further comprising performing, before the determining, by a first MCPTT server, to set up a multi-group call involving N MCPTT groups: receiving, by the first MCPTT server, a multi-group call setup message sent by a second UE, wherein the multi-group call setup message is used by a second MCPTT user to request the first MCPTT server to set up the multi-group call involving the N MCPTT groups, the second MCPTT user is an associated user of the second UE, and an MCPTT group to which the second MCPTT user belongs is at least one of the N MCPTT groups. ### Claim 3 (depends on 2) The method according to claim 2, wherein the determining, by a first MCPTT server, to set up a multi-group call involving N MCPTT groups comprises: determining, by the first MCPTT server according to the multi-group call setup message, to set up the multi-group call, wherein the first MCPTT user is any MCPTT user in the N MCPTT groups other than the second MCPTT user. ### Claim 4 (depends on 1) The method according to claim 1, wherein the sending, by the first MCPTT server, the call message to the first UE comprises: sending, by the first MCPTT server, a first paging message to an MCPTT server of an MCPTT group to which the first MCPTT user belongs, wherein the first paging message is used to page the first UE to join the multi-group call, so that the MCPTT server of the MCPTT group to which the first MCPTT user belongs sends a second paging message to the first UE, wherein the second paging message is used to page the first UE to join the multi-group call. ### Claim 5 A multi-group call setup method, comprising: receiving, by a first user equipment (UE), a call message, wherein the call message is used to add the first UE to a multi-group call involving N mission critical push to talk (MCPTT) groups, wherein N is an integer greater than or equal to 2, wherein a first MCPTT user is an associated user of the first UE, and wherein the first MCPTT user is an MCPTT user in the N MCPTT groups; and joining, by the first UE, the multi-group call according to the call message. ### Claim 6 (depends on 5) The method according to claim 5, wherein the receiving, by the first UE, the call message comprises: receiving, by the first UE, a first paging message, wherein the first paging message is used to page the first UE to join the multi-group call; and wherein the joining, by the first UE, the multi-group call according to the call message comprises: joining, by the first UE, the multi-group call according to the first paging message. ### Claim 7 A mission critical push to talk (MCPTT) server, serving as a first MCPTT server, comprising: a processor; a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to: determine to set up a multi-group call involving N MCPTT groups, wherein N is an integer greater than or equal to 2; and a transceiver, configured to send a call message to first user equipment (UE), wherein the call message is used to add the first UE to the multi-group call, wherein a first MCPTT user is an associated user of the first UE, and wherein the first MCPTT user is an MCPTT user in the N MCPTT groups. ### Claim 8 (depends on 7) The MCPTT server according to claim 7, wherein the transceiver is further configured to receive, before processor determines to set up the multi-group call involving the N MCPTT groups, a multi-group call setup message sent by second UE, wherein the multi-group call setup message is used by a second MCPTT user to request the first MCPTT server to set up the multi-group call involving the N MCPTT groups, wherein the second MCPTT user is an associated user of the second UE, and wherein an MCPTT group to which the second MCPTT user belongs is at least one of the N MCPTT groups. ### Claim 9 (depends on 8) The MCPTT server according to claim 8, the program further includes instructions to determine, when determining to set up the multi-group call involving the N MCPTT groups, according to the multi-group call setup message, to set up the multi-group call, wherein the first MCPTT user is an MCPTT user in the N MCPTT groups other than the second MCPTT user. ### Claim 10 (depends on 7) The MCPTT server according to claim 7, wherein the transceiver is configured to send, when sending the call message to the first UE, a first paging message to an MCPTT server of an MCPTT group to which the first MCPTT user belongs, wherein the first paging message is used to page the first UE to join the multi-group call, so that the MCPTT server of the MCPTT group to which the first MCPTT user belongs sends a second paging message to the first UE, wherein the second paging message is used to page the first UE to join the multi-group call. ### Claim 11 User equipment (UE), serving as a first UE, comprising: a transceiver, configured to receive a call message, wherein the call message is used to add the first UE to a multi-group call involving N mission critical push to talk (MCPTT) groups, N is an integer greater than or equal to 2, a first MCPTT user is an associated user of the first UE, and the first MCPTT user is any MCPTT user in the N MCPTT groups; a processor; and a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to: join the multi-group call according to the call message. ### Claim 12 (depends on 11) The UE according to claim 11, wherein the transceiver is configured to receive a notification message when receiving the call message, wherein the notification message comprises a session identifier of the multi-group call, and wherein the notification message is used to instruct the first UE to join the multi-group call according to the session identifier; and wherein the program further includes instructions to join the multi-group call according to the session identifier when joining the multi-group call according to the call message. ### Claim 13 (depends on 11) The UE according to claim 11, wherein the multi-group call involving the N MCPTT groups is initiated by a second MCPTT user, and wherein the first MCPTT user is an MCPTT user in the N MCPTT groups other than the second MCPTT user. ### Claim 14 (depends on 11) The UE according to claim 11, wherein the transceiver is further configured to perform, when receiving the call message, at least one of: receive the call message that is sent by an MCPTT server of an MCPTT group to which the first MCPTT user belongs; or receive the call message that is sent by an MCPTT server of the first MCPTT user; or receive the call message that is sent by an MCPTT server of a temporary group that comprises the N MCPTT groups. ### Claim 15 (depends on 11) The UE according to claim 11, wherein the transceiver is configured to receive a first paging message, wherein the first paging message is used to page the first UE to join the multi-group call.