# US 10,319,215 B2 · Anti-theft method and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,319,215 B2 - Document ID: US10319215B2 - Status: Granted - Kind: B2 - Application number: 15/528,039 - Filed: 2014-12-19 - Published: 2017-11-09 - Granted: 2019-06-11 - Earliest claimed: 2014-12-19 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Kai Xue; Nan Yang - Web page: https://patentgrep.com/patent/US10319215B2 ## CPC - G08B 25/008: {Alarm setting and unsetting, i.e. arming or disarming of the security system} - G08B 25/10: using wireless transmission systems {(G08B25/009 takes precedence)} - G08B 13/00: Burglar, theft or intruder alarms - G08B 13/19615: {wherein said pattern is defined by the user} - G08B 13/19697: {Arrangements wherein non-video detectors generate an alarm themselves} - G08B 21/22: responsive to presence or absence of persons - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS ## Abstract An anti-theft method and apparatus relating to the field of anti-theft technologies, and to reduce costs. The anti-theft method includes obtaining a detection signal from a terminal device, where the detection signal is a signal sent by the terminal device when the terminal device detects an available network, and performs an alarm operation when the detection signal meets a preset condition. The anti-theft method may be applied in daily life in order to ensure family property security. ## Claims ### Claim 1 An anti-theft method, implemented by a router, comprising: obtaining a WI-FI detection signal from a terminal device, the WI-FI detection signal being sent by the terminal device when the terminal device detects an available WI-FI network; obtaining a signal strength value of the WI-FI detection signal after obtaining the WI-FI detection signal; and performing an alarm operation when the WI-FI detection signal meets a preset condition, the preset condition comprising the signal strength value of the WI-FI detection signal being greater than a preset value, and the alarm operation being performed by sending an alarm message to a preset terminal device which is a device of a user of the router. ### Claim 2 (depends on 1) The method of claim 1, wherein after obtaining the WI-FI detection signal, the method further comprises parsing the WI-FI detection signal to obtain an identifier of the terminal device, and the preset condition comprising the identifier of the terminal device being comprised in a preset identifier table. ### Claim 3 (depends on 1) The method of claim 1, wherein after obtaining the WI-FI detection signal, the method further comprises parsing the WI-FI detection signal in order to obtain an identifier of the terminal device, the identifier of the terminal device being comprised in a preset identifier table. ### Claim 4 (depends on 1) The method of claim 1, further comprising parsing the WI-FI detection signal in order to obtain an identifier of the terminal device, the identifier of the terminal device being comprised in a preset identifier table. ### Claim 5 (depends on 1) The method of claim 1, wherein performing the alarm operation comprises at least one of: sending an alarm message to a preset terminal device; sending an alarm indication message to an image collection apparatus, the alarm indication message being used to instruct the image collection apparatus to collect an image of a user corresponding to the terminal device; or sending an alarm indication message to an alarm apparatus, the alarm indication message being used to instruct the alarm apparatus to output an alarm message. ### Claim 6 An anti-theft apparatus, comprising: a memory comprising instructions; and a processor coupled to the memory, the instructions causing the processor to be configured to: obtain a WI-FI detection signal from a terminal device, the WI-FI detection signal being sent by the terminal device when the terminal device detects an available WI-FI network; obtain a signal strength value of the WI-FI detection signal; and perform an alarm operation when the detection signal meets a preset condition, the preset condition comprising the signal strength value of the WI-FI detection signal being greater than a preset value, the alarm operation being performed by sending an alarm message to a preset terminal device, and the preset terminal device being a device of a user of the anti-theft apparatus. ### Claim 7 (depends on 6) The apparatus of claim 6, wherein the instructions further cause the processor to be configured to parse the WI-FI detection signal in order to obtain an identifier of the terminal device, and the preset condition comprising the identifier of the terminal device being comprised in a preset identifier table. ### Claim 8 (depends on 6) The apparatus of claim 6, wherein the instructions further cause the processor to be configured to parse the WI-FI detection signal to obtain an identifier of the terminal device, the preset condition comprising the signal strength value of the WI-FI detection signal being greater than a preset value, and the identifier of the terminal device being comprised in a preset identifier table. ### Claim 9 (depends on 6) The apparatus of claim 6, wherein the instructions further cause the processor to be configured to send an alarm indication message to an image collection apparatus, and the alarm indication message instructing the image collection apparatus to collect an image of a user corresponding to the terminal device. ### Claim 10 (depends on 6) The apparatus of claim 6, wherein the instructions further cause the processor to be configured to send an alarm indication message to an alarm apparatus, and the alarm indication message instructing the alarm apparatus to output the alarm message. ### Claim 11 (depends on 6) The apparatus of claim 6, wherein the apparatus is a router. ### Claim 12 (depends on 6) The apparatus of claim 6, wherein performing the alarm operation comprises at least one of: sending an alarm message to a preset terminal device; sending an alarm indication message to an image collection apparatus, the alarm indication message being used to instruct the image collection apparatus to collect an image of a user corresponding to the terminal device; or sending an alarm indication message to an alarm apparatus, the alarm indication message is used to instruct the alarm apparatus to output an alarm message. ### Claim 13 (depends on 6) The apparatus of claim 6, wherein the instructions further cause the processor to be configured to parse the WI-FI detection signal in order to obtain an identifier of the terminal device, the identifier of the terminal device being comprised in a preset identifier table. ### Claim 14 A non-transitory computer readable storage medium storing one or more programs, the one or more programs including instructions, which, when executed by a router with one or more processors and one or more memories, cause the router to: obtain a WI-FI detection signal from a terminal device, the WI-FI detection signal being sent by the terminal device when the terminal device detects an available WI-FI network; obtain a signal strength value of the WI-FI detection signal; and perform an alarm operation when the detection signal meets a preset condition, the preset condition comprising the signal strength value of the WI-FI detection being greater than a preset value, the alarm operation being performed by causing the router to be configured to send an alarm message to a preset terminal device, and the preset terminal device being a device of a user of the router. ### Claim 15 (depends on 14) The computer readable storage medium of claim 14, wherein the instructions further cause the router to be configured to parse the WI-FI detection signal in order to obtain an identifier of the terminal device, and the preset condition comprising the identifier of the terminal device being comprised in a preset identifier table. ### Claim 16 (depends on 14) The computer readable storage medium of claim 14, wherein the instructions further cause the router to be configured to parse the WI-FI detection signal to obtain an identifier of the terminal device, the identifier of the terminal device being comprised in a preset identifier table. ### Claim 17 (depends on 14) The computer readable storage medium of claim 14, wherein the instructions further cause the router to be configured to send an alarm indication message to an alarm apparatus, and the alarm indication message instructing the alarm apparatus to output the alarm message. ### Claim 18 (depends on 14) The computer readable storage medium of claim 14, wherein performing the alarm operation comprises at least one of: sending an alarm message to a preset terminal device; sending an alarm indication message to an image collection apparatus, the alarm indication message being used to instruct the image collection apparatus to collect an image of a user corresponding to the terminal device; or sending an alarm indication message to an alarm apparatus, the alarm indication message being used to instruct the alarm apparatus to output an alarm message.