Emergency services using path optimization
First Claim
1. A method of operating a visited access gateway to provide an emergency communication service to a visiting mobile unit, the method comprising:
- transferring a user registration from the visiting mobile unit to a home communication network;
receiving the user registration in the home communication network and transferring a home internet protocol address from the home communication network to the visiting mobile unit;
in the visited access gateway;
receiving an emergency call request having the home internet protocol address from the visiting mobile unit;
transferring the emergency call request having the home internet protocol address over a signaling tunnel from the visiting mobile unit to a visited call processing system;
receiving routing instructions from the visited call processing system, wherein the routing instructions include an internet protocol address for a visited emergency service node and an identity of a bearer tunnel between the visiting mobile unit and the visited emergency service node; and
in accordance with the routing instructions, exchanging emergency communications having the home internet protocol address over the bearer tunnel between the visiting mobile unit and the visited emergency service node.
6 Assignments
0 Petitions
Accused Products
Abstract
A visited access gateway provides an emergency communication service to a visiting mobile unit. The visiting mobile unit transfers a user registration to a home communication network, and the home communication network transfers a home internet protocol address to the visiting mobile unit. Upon receiving an emergency call request having the home internet protocol address from the visiting mobile unit, the access gateway transfers the emergency call request having the home internet protocol address over a signaling tunnel from the visiting mobile unit to a visited call processing system, receives routing instructions from the visited call processing system, and exchanges emergency communications having the home internet protocol address over a bearer tunnel between the visiting mobile unit and a visited emergency service node.
-
Citations
24 Claims
-
1. A method of operating a visited access gateway to provide an emergency communication service to a visiting mobile unit, the method comprising:
-
transferring a user registration from the visiting mobile unit to a home communication network; receiving the user registration in the home communication network and transferring a home internet protocol address from the home communication network to the visiting mobile unit; in the visited access gateway; receiving an emergency call request having the home internet protocol address from the visiting mobile unit; transferring the emergency call request having the home internet protocol address over a signaling tunnel from the visiting mobile unit to a visited call processing system; receiving routing instructions from the visited call processing system, wherein the routing instructions include an internet protocol address for a visited emergency service node and an identity of a bearer tunnel between the visiting mobile unit and the visited emergency service node; and in accordance with the routing instructions, exchanging emergency communications having the home internet protocol address over the bearer tunnel between the visiting mobile unit and the visited emergency service node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A communication system for operating a visited access gateway to provide an emergency communication service to a visiting mobile unit, comprising:
-
the visited access gateway; a visited call processing system; a visited emergency service node; and a signaling tunnel between the visiting mobile unit and the visited call processing system; wherein a home communication network is configured to receive a user registration from a visiting mobile unit, and transfer a home internet protocol address to the visiting mobile unit; wherein the visited access gateway is configured to receive an emergency call request having the home internet protocol address from the visiting mobile unit; wherein the visited access gateway is also configured to transfer the emergency call request having the home internet protocol address over the signaling tunnel; wherein the visited access gateway is also configured to receive routing instructions from the visited call processing system, wherein the routing instructions include an internet protocol address for the visited emergency service node and an identity of a bearer tunnel between the visiting mobile unit and the visited emergency service node; and wherein the visited access gateway is also configured to, in accordance with the routing instructions, exchange emergency communications having the home internet protocol address over the bearer tunnel between the visiting mobile unit and the visited emergency service node. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. A non-transitory computer-readable medium having instructions stored thereon for operating a communication system including a visited access gateway to provide an emergency communication service to a visiting mobile unit, wherein the instructions, when executed by the communication system, direct the communication system to:
-
transfer a user registration from the visiting mobile unit to a home communication network; receive the user registration in the home communication network and transfer a home internet protocol address from the home communication network to the visiting mobile unit; in the visited access gateway; receive an emergency call request having the home internet protocol address from the visiting mobile unit; transfer the emergency call request having the home internet protocol address over a signaling tunnel from the visiting mobile unit to a visited call processing system; receive routing instructions from the visited call processing system, wherein the routing instructions include an internet protocol address for a visited emergency service node and an identity of a bearer tunnel between the visiting mobile unit and the visited emergency service node; and in accordance with the routing instructions, exchange emergency communications having the home internet protocol address over the bearer tunnel between the visiting mobile unit and the visited emergency service node. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
Specification