FHCF: a simple and efficient scheduling scheme for IEEE 802.11e wireless LAN
Mobile Networks and Applications
Design and performance analysis of the Real-Time HCCA scheduler for IEEE 802.11e WLANs
Computer Networks: The International Journal of Computer and Telecommunications Networking
ACM SIGMOBILE Mobile Computing and Communications Review
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This paper proposes a new HCCA scheduling scheme for AFDX (Avionics Full DupleX switched Ethernet) traffics on IEEE 802.11e Wireless LAN (WLAN). The AFDX requirements are related to the temporal constraints (end-to-end latency and jitter). Our scheduling algorithm AWS (AFDX Wireless Scheduler) improves the HCCA reference scheduler (RS); in order to convey AFDX traffic on IEEE 802.11e wireless network. Notice that, the HCCA reference scheduler is more suitable for CBR (Constant Bit Rate) traffics. AWS is based on the priority class, on the frame retransmission management, on the EDF (Earliest Deadline First) algorithm and on the maximal jitter. We also present, in this paper, an optimized version of AWS (OAWS) which uses the un-used bandwidth of TXOPs to transmit frames in critical or retransmission state. The simulation results show that we have a very large reduction of dropped packets (reached deadline) with AWS compared to RS, and the OAWS performances are better than AWS performances.