Performance Evaluation of the Delayed-DCF Scheme in Wireless LANs

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Provided by: International Journal of Future Computer and Communication (IJFCC)
Topic: Networking
Format: PDF
In this paper, the authors evaluate the performance of a variant of IEEE 802.11 DCF. In the delayed-DCF scheme, before transmitting a packet, each node first waits for a deterministic delay, and then enters the normal procedure of the legacy DCF. The delayed-DCF scheme adopts a mixed-type contention resolution method: the deterministic delay postpones the time that nodes contend for channel and its counter counts down without the influence of the channel status, while the legacy back-off time resolves collision when nodes contends for channel and its counter can be adaptively adjusted by the contention intensity of the channel.
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