A Tuning Mechanism for 802.11e Access Parameters for Coping with Delay Asymmetry

Freitag, Juliana; Fonseca, Nelson L. S. da; Rezende, J. de

doi:10.1109/icc.2006.254851

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2007

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“…Precisely, different RPI values of scalable video packets are mapped onto different ACs which mainly use the contention window (CW) and arbitrary interframe space (AIFS) to achieve prioritized transmissions. While this solution may achieve a certain level of ULP, it is recently detailed in[104] that such a mechanism that mainly uses different CW and AIFS settings for service differentiation suffers from many restrictions in transmission optimization. Exploration to other parameters for better service differentiation is necessary.Some proposals have applied to cross-layer retry limit adaptation before[105][106][107].Our proposed ULP scheme for scalable video traffic delivery over WLANs is based on the control of the retry limit setting in EDCA.…”

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confidence: 99%