Ricardo Moraes,  Francisco Vasques,  Paulo Portugal,  José Alberto Fonseca. 

In this paper, a new traffic separation mechanism is proposed for IEEE 802.11e networks. Such Traffic Separation Mechanism (TSm) allows the coexistence of CSMA default stations with real-time stations in the same network domain. A station implementing the proposed TSm scheme has the same operating behavior as a default IEEE 802.11e network station, except in what concerns the evaluation of the backoff delay. A station implementing the TSm scheme eventually imposes the transfer of its messages prior to the transfer of any lower priority message.

http://www.lbd.dcc.ufmg.br:8080/colecoes/sbrc/2006/sc2_2.pdf

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