RANKING-BASED MEDIA ACCESS CONTROL METHOD AND SYSTEM FOR INFRA-STRUCTURE BASED WIRELESS NETWORK

摘要

PURPOSE: A ranking based medium access control method in a wireless network is provided to promote medium usage rates by reducing time overhead consumed in a medium access control process between nodes. CONSTITUTION: Each message transmission node transmits an individual beacon signal in a time slot corresponding to an ID(identification)(S210). Each message transmission node counts the number of beacon signals. Each message transmission node determines an order(S220). Each message transmission node is included in a message transmission node. Each message transmission node transmits messages according to the determined order(S30). [Reference numerals] (S10) Message transmission nodes synchronizes time with the end time of a synchronization beacon signal transmitted by an infrastructure apparatus; (S210) Each message transmission node in the message transmission nodes transmits own beacon signal in a time slot corresponding to ID of the entire time slots; (S220) Each message transmission node in the message transmission nodes determines orders by counting the number of beacon signals before the own beacon signal; (S230) Is a node which newly participates in message transmission existed?; (S240) Message transmission node which newly participates in the message transmission of message transmission nodes uses an ID by selecting ID corresponding to a time slot where beacon signals are not generated; (S250) Infrastructure apparatus optimizes ID filed length by searching ID field length which minimizes the whole wasting time including non-using wasting time and collision wasting time; (S30) Each message transmission node included in message transmission nodes transmits messages according to the determined orders; (S410) Is a node which terminates message transmission existed?; (S420) Message transmission node which terminates the message transmission deletes own ID