Synchronizing push to talk service in wireless communication system
US7792540B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2005 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Dec 5, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99943
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to synchronizing a terminal and a server in a shadow area of service in a push-to-talk (PTT) service system. An alive report packet is periodically transmitted to a server by a terminal having no permission to send a talk burst. A talk burst idle packet is periodically transmitted to each session-established terminal by the server in an idle state. Sessions are ended between each terminal and server if either the alive report packet or the talk burst idle packet are not received for a certain time. Accordingly, synchronization between the server and the terminal is periodically certified, unnecessary traffic generated due to inconsistent synchronization is decreased, and quality of service is enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.