Title:
ローカル網内の加入者局間のディジタルマルチメディアデータ信号用の無線伝送方法
Document Type and Number:
Japanese Patent JP4083270
Kind Code:
B2
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 information between terminals in indoor networks in a wireless manner without a central station.
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Inventors:
Patrick Robertson
Kuhaled fazel
Otto crank
Kuhaled fazel
Otto crank
Application Number:
JP162998A
Publication Date:
April 30, 2008
Filing Date:
January 07, 1998
Export Citation:
Assignee:
Deutsche Thomson-Brandt GmbH
International Classes:
H04J4/00; H04B15/00; H04L12/28
Domestic Patent References:
| JP3012132A |
Foreign References:
| WO1995033313A1 |
Attorney, Agent or Firm:
Tadahiko Ito