# US 12,114,244 B2 · Communication 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 12,114,244 B2 - Document ID: US12114244B2 - Status: Granted - Kind: B2 - Application number: 17/487,965 - Filed: 2021-09-28 - Published: 2022-01-20 - Granted: 2024-10-08 - Earliest claimed: 2019-03-29 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Wenping Bi; Zheng Yu; Yubo Yang; Xingqing Cheng - Web page: https://patentgrep.com/patent/US12114244B2 ## CPC - H04W 4/90: Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS] - H04W 76/50: for emergency connections - H04L 1/0061: {Error detection codes} - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04W 52/58: Format of the TPC bits - H04W 68/005: {Transmission of information for alerting of incoming communication} - H04W 76/14: Direct-mode setup - H04W 92/18: between terminal devices - 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 communication method includes: a first device determines first control information, where the first control information carries first information, and the first information is used to indicate emergency information; and the first control information is format-3 control information, format-3A control information, format-6-0A control information, format-6-0B control information, format-6-1A control information, or format-6-1B control information; the first device sends the first control information to a second device; and the first device sends the emergency information to the second device. The method expands coverage of a network, and may be applied to an internet of things (IoT), for example, machine type communication (MTC), a long term evolution-machine (LTE-M), or machine-to-machine (M2M). ## Claims ### Claim 1 A communication method comprising: determining, by a first device, first control information that includes first information indicating that emergency information is to be received, wherein the first control information includes a plurality of fields, wherein the plurality of fields of the first control information include a first field associated with the first information indicating that emergency information is to be received, and wherein all other fields of the first control information are set to 0; sending, by the first device, the first control information to a second device, wherein the first control information is carried in a type 0 common search space or a user-specific search space such that the second device does not need to monitor a type 2 search space for receiving the emergency information; and sending, by the first device, the emergency information to the second device, wherein the emergency information includes one or more of: an earthquake and tsunami warning system (ETWS) notification, or a commercial mobile alert service (CMAS) notification. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first control information is downlink control information in a long term evolution (LTE) enhanced machine type communication (eMTC) system or downlink control information in a new radio (NR) system. ### Claim 3 (depends on 1) The method according to claim 1, wherein the first control information is format-3 control information, format-3A control information, format-6-0A control information, format-6-0B control information, format-6-1A control information, or format-6-1B control information in a long term evolution (LTE) enhanced machine type communication (eMTC) system. ### Claim 4 (depends on 1) The method according to claim 1, wherein before sending the first control information to the second device, the method further comprises: scrambling, by the first device, a cyclic redundancy check (CRC) code of the first control information using a system information radio network temporary identifier (SI-RNTI). ### Claim 5 A communication method comprising: receiving, by a second device, first control information from a first device that includes first information indicating that emergency information is to be received, wherein the first control information includes a plurality of fields, wherein the plurality of fields of the first control information include a first field associated with the first information indicating that emergency information is to be received, and wherein all other fields of the first control information are set to 0; and in response to receiving the first control information, receiving, by the second device, the emergency information, wherein the first control information is carried in a type 0 common search space or a user-specific search space such that the second device does not need to monitor a type 2 search space for receiving the emergency information, and wherein the emergency information comprises one or more of: an earthquake and tsunami warning system (ETWS) notification, or a commercial mobile alert service (CMAS) notification. ### Claim 6 (depends on 5) The method according to claim 5, wherein the first control information is downlink control information in a long term evolution (LTE) enhanced machine type communication (eMTC) system or downlink control information in a new radio (NR) system. ### Claim 7 (depends on 5) The method according to claim 5, wherein the first control information is format-3 control information, format-3A control information, format-6-0A control information, format-6-0B control information, format-6-1A control information, or format-6-1B control information in a long term evolution (LTE) enhanced machine type communication (eMTC) system. ### Claim 8 (depends on 5) The method according to claim 5, wherein the first control information comprises a cyclic redundancy check (CRC) code which is scrambled by a system information radio network temporary identifier (SI-RNTI). ### Claim 9 A first device comprising: a transceiver; at least one processor; and at least one memory having processor-executable instructions stored thereon; wherein the at least one processor is configured to execute the processor-executable instructions to facilitate the following being performed by the first device: determining first control information, wherein the first control information includes first information indicating that emergency information is to be received, wherein the first control information includes a plurality of fields, wherein the plurality of fields of the first control information include a first field associated with the first information indicating that emergency information is to be received, and wherein all other fields of the first control information are set to 0; sending, via the transceiver, the first control information to a second device, wherein the first control information is carried in a type 0 common search space or a user-specific search space such that the second device does not need to monitor a type 2 search space for receiving the emergency information; and sending, via the transceiver, the emergency information to the second device, wherein the emergency information includes one or more of: an earthquake and tsunami warning system (ETWS) notification, or a commercial mobile alert service (CMAS) notification. ### Claim 10 (depends on 9) The first device according to claim 9, wherein the first control information is downlink control information in a long term evolution (LTE) enhanced machine type communication (eMTC) system or downlink control information in a new radio (NR) system. ### Claim 11 (depends on 9) The first device according to claim 9, wherein the first control information is format-3 control information, format-3A control information, format-6-0A control information, format-6-0B control information, format-6-1A control information, or format-6-1B control information in a long term evolution (LTE) enhanced machine type communication (eMTC) system. ### Claim 12 (depends on 9) The first device according to claim 9, wherein the at least one processor is further configured to execute the processor-executable instructions to facilitate the following being performed by the first device: before sending the first control information to the second device, scrambling, by the first device, a cyclic redundancy check (CRC) code of the first control information using a system information radio network temporary identifier (SI-RNTI). ### Claim 13 A second device comprising: a transceiver; at least one processor; and at least one memory having processor-executable instructions stored thereon; wherein the at least one processor is configured to execute the processor-executable instructions to facilitate the following being performed by the second device: receiving, via the transceiver, first control information from a first device that includes first information indicating that emergency information is to be received, wherein the first control information includes a plurality of fields, wherein the plurality of fields of the first control information include a first field associated with the first information indicating that emergency information is to be received, and wherein all other fields of the first control information are set to 0; and in response to receiving the first control information, receiving, via the transceiver, the emergency information, wherein the first control information is carried in a type 0 common search space or a user-specific search space such that the second device does not need to monitor a type 2 search space for receiving the emergency information, wherein the emergency information includes one or more of: an earthquake and tsunami warning system (ETWS) notification, or a commercial mobile alert service (CMAS) notification. ### Claim 14 (depends on 13) The second device according to claim 13, wherein the first control information is downlink control information in a long term evolution (LTE) enhanced machine type communication (eMTC) system or downlink control information in a new radio (NR) system. ### Claim 15 (depends on 13) The second device according to claim 13, wherein the first control information is format-3 control information, format-3A control information, format-6-0A control information, format-6-0B control information, format-6-1A control information, or format-6-1B control information in a long term evolution (LTE) enhanced machine type communication (eMTC) system. ### Claim 16 (depends on 13) The second device according to claim 13, wherein the first control information comprises a cyclic redundancy check (CRC) code which is scrambled by a system information radio network temporary identifier (SI-RNTI). ### Claim 17 (depends on 1) The method according to claim 1, wherein the first control information is format-3 or format-3A control information, and wherein one or more transmit power control (TPC) commands in the first control information indicate the first information. ### Claim 18 (depends on 5) The method according to claim 5, wherein the first control information is format-3 or format-3A control information, and wherein one or more transmit power control (TPC) commands in the first control information indicate the first information. ### Claim 19 (depends on 9) The first device according to claim 9, wherein the first control information is format-3 or format-3 A control information, and wherein one or more transmit power control (TPC) commands in the first control information indicate the first information. ### Claim 20 (depends on 13) The second device according to claim 13, wherein the first control information is format-3 or format-3A control information, and wherein one or more transmit power control (TPC) commands in the first control information indicate the first information.