| 摘要 |
Method and System for the improvement of the QoS support in de-centrally organized wireless networks. The IEEE 802.11 is enhanced so that the effects of contention of traffic classes with the same priority, that are competing for access to the transmission medium is reduced, thus guaranteeing QoS requirements. Stations that want to transmit, will begin transmission of an signal once they sense that the transmission medium is idle. This signal is transmitted for a number of time slots depending on the priority of the traffic class the station wants to transmit. Once this transmission is over the stations will again sense the medium. If it is busy the stations will resign from transmitting and wait till the next access cycle. If the medium is idle, then the stations will perform a random back-off and then begin to transmit. This random back-off is used to avoid any contention between stations that have the same traffic class priority as the station with the lowest random back-off will begin to transmit first. <IMAGE>
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