公开(公告)号：US08027316B1

公开(公告)日：2011-09-27

申请号：US11495860

申请日：2006-07-28

Applicant: Steven Barrow ,  Safwan Khan ,  Trinh Vu

Inventor： Steven Barrow ,  Safwan Khan ,  Trinh Vu

IPC: H04B7/216

CPC classification number: H04W4/10 ,  H04L65/104 ,  H04L65/4061 ,  H04W76/45

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.

Abstract translation: 一种通信系统包括第一PTT网络和具有多个互操作性网关的第二PTT网络。 用于有效地选择在第二PTT网络终止的PTT呼叫的互操作性网关的方法包括从第一PTT网络接收PTT呼叫请求，PTT呼叫请求标识第二PTT网络上的目标用户单元，并将PTT呼叫请求转发到 第一个互操作性网关 如果请求成功，则接收到通知，并且通知包括目标的标识和第二互操作性网关。 该信息存储在高速缓存中，用于将后续的PTT呼叫引导到相应的第二互操作性网关。 在一个实施例中，第一PTT网络是iDEN网络，而第二PTT网络是HPPTT网络，PTT呼叫是HPPTT呼叫。