Multiplex communications – Channel assignment techniques – Carrier sense multiple access
Patent
1995-06-06
1997-01-07
Olms, Douglas W.
Multiplex communications
Channel assignment techniques
Carrier sense multiple access
370349, 455 582, H04L 12413
Patent
active
055924832
ABSTRACT:
When an apparatus C which shares the media with apparatuses A and B desires to transmit an RTS packet, apparatus C inhibits transmission of the RTS packet for a fixed waiting time Tm plus a transmission inhibition period which varies depending on a type of a packet in a sensed carrier. In other words, when apparatus C senses an RTS packet of apparatus A, apparatus C inhibits transmission for a packet transmission inhibition period 101 resulting from reception of RTS. When apparatus C senses a CTS packet of apparatus B, apparatus C inhibits transmission for a packet transmission inhibition period 102 resulting from reception of CTS. When apparatus C senses a data packet, apparatus C inhibits transmission for a packet transmission inhibition period 103 resulting from reception of a data packet. When apparatus C senses an ACK packet of apparatus B, apparatus C inhibits transmission for a packet transmission inhibition period 104 resulting from reception of an ACK. As a result, a data communication apparatus which achieves efficient communication between a plurality of data communication apparatuses which share the same media is provided.
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Hieda Kaoru
Imai Akira
Tsukamoto Masahiko
Conlin David G.
Michaelis Brian L.
Nguyen Chau T.
Olms Douglas W.
Sharp Kabushiki Kaisha
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