Push-to-talk call setup for a mobile packet data dispatch network
US7231223B2 · kind B2 · utility
7Cited by
9References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2002 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Jul 16, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A proactive speculation method decreases the call setup time for private calls (200) and selective dynamic group calls (300). In a push-to-talk dispatch network (40) an originating mobile unit (10) sends a wake-up packet (54, 114) to the dispatch network (40). Prior to initiating the push-to-talk function, the target mobile units (20–30) receive a wake-up packet (68, 146–148) from network (40). Thereby, prior to establishing the push-to-talk function, each of the mobile units in the push-to-talk call have been coupled via RF links. If the originating mobile unit has a current IP address, direct wake-up packets (72) may be sent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.