Patent ID: 7702346
Filing Date: 2010-04-20
Classification: H04W

Abstract:
1. An inter-working network for facilitating dispatch communications between a plurality of dispatch networks, at least two of the dispatch networks having incompatible technologies, the inter-working network comprising: an integrated dispatch enhanced network that is a first of the at least two dispatch networks; a high performance push-to-talk network that is a second of the at least two dispatch networks, wherein the inter-working network is adapted to facilitate dispatch communications between roaming subscribers on the integrated dispatch enhanced network and roaming subscribers on the high performance push-to-talk network; a core inter-working network; a plurality of points-of-presence connected to the core inter-working network; and a plurality of border gateways interfacing each of the dispatch networks to at least one of the plurality of points-of-presence; wherein the points-of-presence facilitate roaming of subscribers on the dispatch networks by translating dispatch session messages received from an originating dispatch network into a common signaling format before session processing, and translating dispatch session messages from the common signaling format into a format compatible with a target dispatch network.