Data transmission over a time division duplex channel
US5117423A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1990 |
| Grant date | May 26, 1992 |
| Priority date | — |
| Expiry date | May 23, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W76/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of, and system for, data transmission over a time division duplex channel in which at least one duplex voice channel constituted by a pair of non-adjacent time slots (or physical channels) in a succession of time frames is allocated for effecting a data transaction between a first and a second station, one of said pair of time slots (or physical channels) being normally designated for unidirectional transmission of data in a first direction between the first and second stations and the other of the pair of time slots (or physical channels) being normally designated for unidirectional transmission of data in a second direction, opposite to the first direction. The system comprises means for determining that either of the time slots (or physical channels) of a duplex voice channel will not participate in, or is not participating in, the transmission of useful data because the data transfer is largely asymmetric and for releasing the non-participating time slots (or physical channels) and making them available for other unidirectional signalling, such as the parallel transmission of data packets in the current data transaction, retransmission of corrupted data packets, or the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.