The present invention is directed to maximizing efficiency, or throughput, in a communications network where plural bidding devices arbitrate for access to a central device, while fairness in the bid arbitration process is maintained. Such enhanced operation is achieved by providing at least one central...http://www.google.com.hk/patents/US5654968?utm_source=gb-gplus-share專利 US5654968 - Method and apparatus for managing a number of time slots during which plural bidding devices can request communication access to a central device