Radio transmission method for digital multimedia data signals between subscriber stations in a local network
US6275506A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1998 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Jan 7, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W56/0085
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In the radio transmission method according to the invention, which operates with a mixed frequency and time division multiplex method FDMA/TDMA, in which a relatively broad frequency band is divided according to the FDMA method into a plurality of carrier frequency ranges, namely the so-called main channels, and a plurality of time slots, namely the so-called sub-channels, distributed in a frame structure, are formed on each carrier frequency level according to the TDMA method, a grouping, that is to say a so-called cluster, of subscriber stations is assigned a limited number of main channels. A main channel signal is divided into one or more sub-channel signals which are associated with a cluster and which are transmitted using the TDMA method. Each transmitter of an activated subscriber station transmits a detectable check signal, so that, on the basis of detection of a check signal in the respective receiver, other, newly activated subscriber stations can determine the presence of transmit signals which are present within a specific, spatially limited range, namely their own respective transmission range. The method according to the invention can be used for transmitting informa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.