System and method for delivering short message service text to call centers

摘要

A wireless emergency system that includes a mobile switching center, a short message service center that receives an emergency text message of a caller from the mobile switching center, and gateway in communication with the short message service center to route the emergency text message to a responsive public safety answering point as a tone message.

主权项

1. A wireless emergency system comprising:
a mobile switching center that receives an emergency text message of a caller from the caller's mobile communications device; a short message service center that receives the emergency text message from the mobile switching center; and a gateway in communication with the short message service center to route the emergency text message to a responsive public safety answering point, the gateway including:
(i) a transcoder that exchanges text messages with the short message service center and exchanges TTY tone messages with the responsive public safety answering point, the transcoder bi-directionally translating between text message and TTY tone message formats, and(ii) a table of communication sessions with a telephone number of the caller for each existing communication session,
wherein the gateway is configured to access the table to determine whether an incoming text message is an initial message or is otherwise part of an existing communication session with a public safety answering point, such that the gateway:(a) routes TTY tone messages corresponding to an initial message to a responsive public safety answering point based on the caller's present location determined dynamically, and(b) instead routes TTY tone messages corresponding to an incoming text message that is part of an existing communication session to the public safety answering point handling the existing communication session.