Systems and methods for providing push to talk feature for wireless communication systems
US6751468B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1999 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Dec 29, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods are provided for allowing a first wireless unit and a second wireless unit to share a single communication channel including a transmit frequency and a receive frequency. The systems and methods allow for a more spectrally efficient transmission of Push To Talk mode calls over a Time Division Multiple Access system. The systems and methods include assigning the single communication channel to the first wireless unit and the second wireless unit, so that the first wireless unit and the second wireless unit may alternatively transmit on the transmit frequency, and the first wireless unit and the second wireless unit may monitor the receive frequency; receiving a first transmission from the first wireless unit on the transmit frequency; sending a signal to the first wireless unit indicating to the first wireless unit to stop transmitting; sending a signal to the second wireless unit that the second wireless unit can send a second transmission on the transmit frequency; and receiving the second transmission from the second wireless unit on the transmit frequency. The systems include a first wireless unit, a second wireless unit, and a base station. The first wireles…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.