Efficient selection of interoperability gateway for CDMA terminated PTT calls
First Claim
1. In a communications system including a first Push-to-Talk (PTT) network, and a second PTT network having a plurality of interoperability gateways, a method for efficiently selecting an interoperability gateway for PTT calls terminated at the second PTT network comprising:
- receiving, by a PTT interoperability infrastructure, a PTT call request from the first PTT network, the PTT call request identifying a target subscriber unit on the second PTT network;
forwarding, by the PTT interoperability infrastructure, the PTT call request to a first interoperability gateway of the second PTT network;
receiving, by the PTT interoperability infrastructure, a notification that the PTT call request has succeeded, the notification including an identification of the target subscriber unit and an identification of a second interoperability gateway of the second PTT network, wherein the second interoperability gateway corresponds to a current location of the target subscriber unit;
storing, by the PTT interoperability infrastructure, an identifier of the target subscriber and an identifier of the second interoperability gateway in a cache for subsequent use in routing calls to the target subscriber unit; and
routing a subsequent PTT call request from the first PTT network identifying the target subscriber unit to the second interoperability gateway of the second PTT network.
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Accused Products
Abstract
A communications system includes a first PTT network, and a second PTT network having a plurality of interoperability gateways. A method for efficiently selecting an interoperability gateway for PTT calls terminated at the second PTT network includes receiving a PTT call request from the first PTT network, the PTT call request identifying a target subscriber unit on the second PTT network and forwarding the PTT call request to a first interoperability gateway. Notification is received if the request has succeeded, and the notification includes an identification of the target and a second interoperability gateway. This information is stored in cache for directing subsequent PTT calls to the same target to the corresponding second interoperability gateway. In one embodiment, the first PTT network is an iDEN network and the second PTT network is a HPPTT network and the PTT call is a HPPTT call.
20 Citations
15 Claims
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1. In a communications system including a first Push-to-Talk (PTT) network, and a second PTT network having a plurality of interoperability gateways, a method for efficiently selecting an interoperability gateway for PTT calls terminated at the second PTT network comprising:
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receiving, by a PTT interoperability infrastructure, a PTT call request from the first PTT network, the PTT call request identifying a target subscriber unit on the second PTT network; forwarding, by the PTT interoperability infrastructure, the PTT call request to a first interoperability gateway of the second PTT network; receiving, by the PTT interoperability infrastructure, a notification that the PTT call request has succeeded, the notification including an identification of the target subscriber unit and an identification of a second interoperability gateway of the second PTT network, wherein the second interoperability gateway corresponds to a current location of the target subscriber unit; storing, by the PTT interoperability infrastructure, an identifier of the target subscriber and an identifier of the second interoperability gateway in a cache for subsequent use in routing calls to the target subscriber unit; and routing a subsequent PTT call request from the first PTT network identifying the target subscriber unit to the second interoperability gateway of the second PTT network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In a Push-to-Talk (PTT) communications system including a first PTT network and a second PTT network having a plurality of interoperability gateways, a system comprising:
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an interface to the first PTT network; an interface to the second PTT network; a controller adapted to; receive a PTT call request from the first PTT network, the PTT call request identifying a target subscriber unit on the second PTT network; forward the PTT call request to a first PTT interoperability gateway of the second PTT network; receive notification that the request has succeeded, the notification including an identification of a second PTT interoperability gateway of the second PTT network, wherein the second PTT interoperability gateway corresponds to a current location of the target subscriber unit; store an identifier of the target subscriber and an identifier of the interoperability gateway; and route a subsequent PTT call request from the first PTT network identifying the target subscriber unit to the second interoperability gateway of the second PTT network. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification