Dynamic bandwidth partition schemes for integrated voice, video, and data traffic in the IEEE 802.11e distributed wireless LANs

摘要

In mobile cellular networks, bandwidth is deterministic in terms of the number of channels by frequency division, time division, or code division. On the other hand, bandwidth partition schemes in the contention-based medium access control (MAC) in distributed wireless LANs are extremely challenging due to the contention-based nature, packet-based network, and the most important aspect: only one channel available, competed by an unknown number of stations. In this paper, we study this challenging issue. We propose and study four different bandwidth partition schemes for integrated voice/video/data traffic in the IEEE 802.11e wireless LANs: a Static bandwidth Partition (SP) scheme, a Dynamic budget Partition (DP) scheme, a Dynamic bandwidth Partition with Finer-Tune (DP-FT) scheme, and a Dynamic bandwidth Partition with Reserved Region (DP-RR). The proposed schemes are compared and evaluated via extensive simulations. Results show that the DP-FT scheme is the best scheme.