Method and apparatus for wireless bandwidth efficient multi-way calling
US6707826B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2000 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Mar 20, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A bandwidth efficient method of wireless communication among simultaneous multiple users includes the steps of monitoring (102) for voice activity from a plurality of sources (302 or 304) on a channel and detecting voice activity (107) among the plurality of sources during a predetermined time period. If voice activity is detected from only a first source, then code the voice activity from the first source and transmit a full-rate packet of data (109) to a wireless subscriber (50). If voice activity is detected from at least a first source and a second source amounting to N sources, then code such N sources using a 1/N-rate vocoder to obtain N different 1/N rate data packets (112) and combining (114) the N 1/N-rate data packets from at least the first source and the second source before transmitting (116) a full packet of data to the wireless subscriber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.