Master station of communication system and access control method
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United States of America Patent
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Aug 27, 2013
Grant Date -
Aug 25, 2011
app pub date -
May 2, 2011
filing date -
Aug 6, 2003
priority date (Note) -
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Abstract
A communication bandwidth is divided into a beacon period in which all master stations compete for transmission of a beacon packet, a first carrier sense multiple access (CSMA) period in which only authorized specific stations are allowed to compete for access, and a second CSMA period in which all stations are allowed to compete for access. The master stations exchange information with each other about a communication bandwidth being used in the first CSMA period, thereby calculating a communication bandwidth which can be used by each communication system in the first CSMA period, based on the information.
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