Digital transmission system
AssigneeFuji Xerox Co., Ltd.
InventorYoichi Tan
Life of this patent
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Abstract
In a multi station communication network wherein interstation communications are carried out by transmitting packets of information in selected blocks of repeating time division multiplex frames, the calling station reserves a block for transmission of an answer packet from the called station.
Claims10
A digital signal transmission system for a multistation communication network of the type wherein digital signals are transmitted over a communication cable between stations in a time division multiplex mode in successive frames with each frame comprising a plurality of blocks, packets of digital signals from each station being arranged in respective blocks, said digital signal transmission system comprising:
- means at a first of said stations for transmitting at least one calling packet onto said communication cable addressed to a second of said stations;
- means at said first station for reserving at least a designated one of said blocks for use by said second station in transmitting at least one answer packet to said first station.
In a method of digital signal communication of the type comprising the steps of transmitting a calling packet of digital signals from a calling station onto a communication cable in a predetermined one of a plurality of blocks in one frame of repeating time division multiplex frames, receiving said calling packet at a called station and transmitting an answer packet over said cable from said called station to said calling station in a selected block of said one frame or in a succeeding frame, the improvement comprising the steps of:
- reserving at said calling station a designated block in said repeating frames for transmission of said answer packet from said called station to said calling station.
Dependencies are inferred from the claim text.