Multiplex communications – Channel assignment techniques – Carrier sense multiple access
Reexamination Certificate
2007-08-07
2010-11-30
Pham, Chi H. (Department: 2471)
Multiplex communications
Channel assignment techniques
Carrier sense multiple access
C370S252000
Reexamination Certificate
active
07843956
ABSTRACT:
A wireless communication system complying with a CSMA scheme includes one or more wireless communication apparatuses and a communication terminal that performs communication via the one or more wireless communication apparatuses. Each wireless communication apparatus includes: a transmission buffer configured to store a packet and output the packet according to transmission timing; a unit configured to determine a permissible delay time based on required quality for communication; and a control unit configured to determine the transmission timing, wherein, the control unit determines the transmission timing such that, after receiving a first packet, the wireless communication apparatus transmits the first packet after elapse of a waiting time that includes a period derived from a random number and the permissible delay time, and after receiving a response packet for the first packet, the wireless communication apparatus transmits a following second packet after elapse of a fixed period.
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Yagyu Kengo
Yamada Akira
Mew Kevin
NTT DoCoMo Inc.
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Pham Chi H.
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