# US 10,771,609 B2 · Messaging to emergency services via a mobile device in a wireless communication network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,771,609 B2 - Document ID: US10771609B2 - Status: Granted - Kind: B2 - Application number: 15/828,208 - Filed: 2017-11-30 - Published: 2019-05-30 - Granted: 2020-09-08 - Earliest claimed: 2017-11-30 - Assignees: T-Mobile USA, Inc. - Applicants: T-Mobile USA, Inc. - Inventors: Vinod Ravichandran - Web page: https://patentgrep.com/patent/US10771609B2 ## CPC - H04M 1/72421: with automatic activation of emergency service functions, e.g. upon sensing an alarm - H04L 51/046: Interoperability with other network applications or services - H04L 51/222: using geographical location information, e.g. messages transmitted or received in proximity of a certain spot or area - H04L 65/1069: Session establishment or de-establishment - H04M 1/72424: with manual activation of emergency-service functions - H04M 3/5116: {for emergency applications} - H04M 3/5191: {interacting with the Internet} - H04M 7/0045: {where the text-based messaging service is an instant messaging service} - H04M 1/72457: according to geographic location - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A method of requesting emergency services via an emergency services request application executing on a mobile device operating in a wireless communication network. The method includes determining, by the application, a location of the mobile device. Based at least in part on the location, the wireless communication network determines a Public Safety Answering Point (PSAP)/emergency service responder to contact. The application then attempts to initiate a chat session with the PSAP to request emergency services. The application next receives a response to initiating the chat session from the PSAP. The response may be some type of acknowledgement from the PSAP of a successful initiation of the chat session or may be a bounce-back message indicating an unsuccessful initiation of the chat session. ## Claims ### Claim 1 A method of requesting emergency services, the method comprising: executing, in response to user input provided to a mobile device of a user to request emergency services at a location of the mobile device, an emergency services request application on the mobile device; attempting, by the emergency services request application, to initiate a chat session with a public safety answering point (PSAP) that, upon a successful initiation, continues between the emergency services request application executing on the mobile device and the PSAP until the chat session is terminated by the PSAP; determining, by the emergency services request application, the location of the mobile device; sending, by the emergency services request application to a wireless communication network, the location of the mobile device; sending, by the emergency services request application to the wireless communication network, a packet that includes a header that distinguishes that a messaging service is being used to contact the PSAP; and receiving, by the emergency services request application from a particular PSAP selected based at least in part on the location of the mobile device, a response comprising one of (i) an acknowledgement message indicating the successful initiation of the chat session or (ii) a bounce-back message indicating that the attempt to initiate the chat session failed. ### Claim 2 (depends on 1) The method of claim 1, wherein the method further comprises: based upon receipt of the bounce-back message, displaying, with the emergency services request application, a message to the user of the mobile device that indicates that the user should call an emergency number. ### Claim 3 (depends on 1) The method of claim 1, wherein the response comprises the acknowledgement message and the acknowledgement message requests information from the user of the mobile device with respect to a reason for initiating the chat session. ### Claim 4 (depends on 1) The method of claim 1, further comprising: providing, by the emergency services request application, location information to the particular PSAP. ### Claim 5 (depends on 1) The method of claim 1, further comprising: forwarding, by the emergency services request application, one or more files to the particular PSAP. ### Claim 6 (depends on 5) The method of claim 5, wherein forwarding the one or more files to the particular PSAP comprises: forwarding at least one of (i) a picture, (ii) an audio recording or (iii) a video. ### Claim 7 (depends on 1) The method of claim 1, wherein the chat session operates between the emergency services request application and the PSAP based on Session Initiation Protocol (SIP) and Message Session Relay Protocol (MSRP) protocols. ### Claim 8 A mobile device comprising: one or more processors; a non-transitory storage medium; and instructions stored in the non-transitory storage medium, the instructions being executable by the one or more processors to: execute, in response to user input provided to request emergency services at a location of the mobile device, an emergency services request application on the mobile device; attempt, by the emergency services request application, to initiate a chat session with a public safety answering point (PSAP) that, upon a successful initiation, continues between the emergency services request application executing on the mobile device and the PSAP until the chat session is terminated by the PSAP; determine, by the emergency services request application, the location of the mobile device; send, by the emergency services request application to a wireless communication network, the location of the mobile device; send, by the emergency services request application to the wireless communication network, a packet that includes a header that distinguishes that a messaging service is being used to contact the PSAP; and receive, by the emergency services request application from a particular PSAP selected based at least in part on the location of the mobile device, a response comprising one of (i) an acknowledgement message indicating the successful initiation of the chat session or (ii) a bounce-back message indicating that the attempt to initiate the chat session failed. ### Claim 9 (depends on 8) The mobile device of claim 8, wherein the instructions are further executable by the one or more processors to: based upon receipt of the bounce-back message, display, by the emergency services request application, a message to a user of the mobile device that indicates that the user should call an emergency number. ### Claim 10 (depends on 8) The mobile device of claim 8, wherein the response comprises the acknowledgement message and the acknowledgement message requests information from a user of the mobile device with respect to a reason for initiating the chat session. ### Claim 11 (depends on 8) The mobile device of claim 8, wherein the instructions are further executable by the one or more processors to: provide, by the emergency services request application, location information to the particular PSAP. ### Claim 12 (depends on 8) The mobile device of claim 8, wherein the instructions are further executable by the one or more processors to: forward, by the emergency services request application, one or more files to the particular PSAP. ### Claim 13 (depends on 12) The mobile device of claim 12, wherein the one or more files comprise at least one of (i) a picture, (ii) an audio recording or (iii) a video. ### Claim 14 (depends on 8) The mobile device of claim 8, wherein the chat session operates between the emergency services request application and the PSAP based on Session Initiation Protocol (SIP) and Message Session Relay Protocol (MSRP) protocols. ### Claim 15 A non-transitory storage medium comprising instructions stored thereon, the instructions being executable by one or more processors of a mobile device to: execute, in response to user input provided to the mobile device to request emergency services at a location of the mobile device, an emergency services request application on the mobile device; attempt, by the emergency services request application, to initiate a chat session with a public safety answering point (PSAP) that, upon a successful initiation, continues between the emergency services request application executing on the mobile device and the PSAP until the chat session is terminated by the PSAP; determine, by the emergency services request application, the location of the mobile device; send, by the emergency services request application to a wireless communication network, the location of the mobile device; send, by the emergency services request application to the wireless communication network, a packet that includes a header that distinguishes that a messaging service is being used to contact the PSAP; and receive, by the emergency services request application from a particular PSAP selected based at least in part on the location of the mobile device, a response comprising one of (i) an acknowledgement message indicating the successful initiation of the chat session or (ii) a bounce-back message indicating that the attempt to initiate the chat session failed. ### Claim 16 (depends on 15) The non-transitory storage medium of claim 15, wherein the instructions are further executable by the one or more processors to: provide, by the emergency services request application, location information to the particular PSAP. ### Claim 17 (depends on 15) The non-transitory storage medium of claim 15, wherein the instructions are further executable by the one or more processors to: forward, by the emergency services request application, one or more files to the particular PSAP. ### Claim 18 (depends on 17) The non-transitory storage medium of claim 17, wherein the one or more files comprise at least one of (i) a picture, (ii) an audio recording or (iii) a video. ### Claim 19 (depends on 15) The non-transitory storage medium of claim 15, wherein the response comprises the bounce-back message and wherein the instructions are further executable by the one or more processors to: based upon receipt of the bounce-back message, display, by the emergency services request application, a message to a user of the mobile device that indicates that the user should call an emergency number. ### Claim 20 (depends on 15) The non-transitory storage medium of claim 15, wherein the response comprises the acknowledgement message and the acknowledgement message requests information from a user of the mobile device with respect to a reason for initiating the chat session.