Invention Grant
- Patent Title: Method and apparatus for registration of location information of wireless devices in a wireless communication network supporting multicast calls
- Patent Title (中): 用于在支持多播呼叫的无线通信网络中登记无线设备的位置信息的方法和装置
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Application No.: US14182625Application Date: 2014-02-18
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Publication No.: US09565536B2Publication Date: 2017-02-07
- Inventor: Xinping Zhang
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent Raphael Freiwirth; Michael F. Taveira
- Main IPC: H04B7/00
- IPC: H04B7/00 ; H04W4/10 ; H04W76/00 ; H04W64/00 ; H04W4/02 ; H04W60/04
Abstract:
An apparatus and method for transmitting push-to-talk (PTT) communications through multicast channels to a plurality of wireless devices. The PTT server uses the unicast approach to deliver the PTT communication to a group of PTT clients when it does not have the location information of the PTT clients in the group. In one embodiment, the wireless devices report their location to a PTT server after receiving a PTT communication for a group and a timer is started. The wireless devices continue to report their location when moving from an area served by one base station to an area served by another before the timer expires. The PTT server also starts the timer for that PTT group with the same value after initiating the PTT group communication. The PTT server uses the location information to determine if multicast channels can be used when transmitting PTT communications to the wireless devices.
Public/Granted literature
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