# US 11,310,708 B2 · Communication method, access network device, core network device, and user equipment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,708 B2 - Document ID: US11310708B2 - Status: Granted - Kind: B2 - Application number: 16/503,278 - Filed: 2019-07-03 - Published: 2019-10-24 - Granted: 2022-04-19 - Earliest claimed: 2017-01-06 - Assignees: Honor Device Co., Ltd. - Applicants: Honor Device Co., Ltd. - Inventors: Feng Han; Yinghao Jin; Hong Li; Wei Tan - Web page: https://patentgrep.com/patent/US11310708B2 ## CPC - H04W 4/029: Location-based management or tracking services - H04W 36/0055: {Transmission or use of information for re-establishing the radio link} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04W 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00) - H04W 48/18: Selecting a network or a communication service - H04W 48/16: Discovering, processing access restriction or access information - H04W 84/042: {Public Land Mobile systems, e.g. cellular systems} - 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 Embodiments of the present invention provide a communication method, an access network device, a core network device, and user equipment. One example method includes: sending, by a core network device, a handover request to an access network device, wherein the handover request comprises first information, and the first information comprises an identifier of allowed network slice selection assistance information (NSSAI); and sending, by the access network device, a handover request acknowledgement to the core network device. ## Claims ### Claim 1 A communication method, comprising: receiving, by an access network device, downlink non-access stratum (NAS) signaling from a core network device, wherein the downlink NAS signaling comprises first information, and the first information comprises an identifier of allowed session management-network slice selection assistance information; and storing, by the access network device, the first information. ### Claim 2 (depends on 1) The communication method according to claim 1, wherein the first information further comprises information about a tracking area that user equipment is allowed to access. ### Claim 3 (depends on 1) The communication method according to claim 1, wherein the first information further comprises information about a tracking area that user equipment is not allowed to access. ### Claim 4 (depends on 1) The communication method according to claim 1, wherein the first information further comprises information about a public land mobile network that user equipment is allowed to access. ### Claim 5 (depends on 1) The communication method according to claim 1, wherein the session management-network slice selection assistance information comprises a slice/service type. ### Claim 6 (depends on 5) The communication method according to claim 5, wherein the session management-network slice selection assistance information further comprises a slice differentiator. ### Claim 7 An access network device, comprising: a receiver, configured to receive downlink non-access stratum (NAS) signaling from a core network device, wherein the downlink NAS signaling comprises first information, and the first information comprises an identifier of allowed session management-network slice selection assistance information; a non-transitory memory storage comprising instructions; and one or more hardware processors in communication with the non-transitory memory storage, wherein the one or more hardware processors execute the instructions to store the first information. ### Claim 8 (depends on 7) The access network device according to claim 7, wherein the first information further comprises information about a tracking area that user equipment is allowed to access. ### Claim 9 (depends on 7) The access network device according to claim 7, wherein the first information further comprises information about a tracking area that user equipment is not allowed to access. ### Claim 10 (depends on 7) The access network device according to claim 7, wherein the first information further comprises information about a public land mobile network that user equipment is allowed to access. ### Claim 11 (depends on 7) The access network device according to claim 7, wherein the session management-network slice selection assistance information comprises a slice/service type. ### Claim 12 (depends on 11) The access network device according to claim 11, wherein the allowed session management-network slice selection assistance information further comprises a slice differentiator. ### Claim 13 A non-transitory computer-readable medium storing computer instructions, that when executed by one or more hardware processors, cause an access network device to perform operations comprising: receiving downlink non-access stratum (NAS) signaling from a core network device, wherein the downlink NAS signaling comprises first information, and the first information comprises an identifier of allowed session management-network slice selection assistance information; and storing the first information. ### Claim 14 (depends on 13) The non-transitory computer-readable medium according to claim 13, wherein the first information further comprises information about a tracking area that user equipment is allowed to access. ### Claim 15 (depends on 13) The non-transitory computer-readable medium according to claim 13, wherein the first information further comprises information about a tracking area that user equipment is not allowed to access. ### Claim 16 (depends on 13) The non-transitory computer-readable medium according to claim 13, wherein the first information further comprises information about a public land mobile network that user equipment is allowed to access. ### Claim 17 (depends on 13) The non-transitory computer-readable medium according to claim 13, wherein the allowed session management-network slice selection assistance information comprises a slice/service type. ### Claim 18 (depends on 17) The non-transitory computer-readable medium according to claim 17, wherein the allowed session management-network slice selection assistance information further comprises a slice differentiator.