公开(公告)号：US5228026A

公开(公告)日：1993-07-13

申请号：US573307

申请日：1990-11-26

申请人： Richard Albrow ,  Nigel E. Barnes ,  Graham E. Beesley ,  Chris Cant ,  Malcolm Crisp ,  Michael T. Dudek ,  Rupert Goodings ,  David C. Odhams ,  Peter N. Proctor ,  Ian Rodgers

发明人： Richard Albrow ,  Nigel E. Barnes ,  Graham E. Beesley ,  Chris Cant ,  Malcolm Crisp ,  Michael T. Dudek ,  Rupert Goodings ,  David C. Odhams ,  Peter N. Proctor ,  Ian Rodgers

IPC分类号： H04J3/12 ,  H04B7/26 ,  H04J3/00 ,  H04J3/06 ,  H04L5/16 ,  H04L7/04 ,  H04L7/08 ,  H04M1/00 ,  H04M1/02 ,  H04M1/24 ,  H04M1/72 ,  H04M1/725 ,  H04M1/733 ,  H04Q7/38

CPC分类号： H04M1/733 ,  H04J3/0602 ,  H04J3/0652 ,  H04M1/72505 ,  H04L7/041

摘要： A communication procedure suitable for a cordless telephone system involves time division duplex radio communication between a handset 11 and a base station using alternating bursts of transmission over a single radio channel. Once a radio link has been set up, initial transmissions carry a synchronization logical channel S and a signalling logical channel D multiplexed together, but the link may switch to bursts carrying a communications logical channel B for the speech data and the signalling logical channel D. Burst synchronization is achieved by the asynchronous detection of words in a synchronization channel S. These words have bit patterns reducing the probability of incorrect asynchronous detection of them. If one part ceases to receive handset signals from the other, it transmits a special signal, informing the other part. This enables both parts to detect the failure of a link at substantially the same time, so that their actions to re-establish the link are synchronized.