Error prediction for adaptive modulation and coding in multiple-antenna OFDM systems
Signal Processing - Special section: Advances in signal processing-assisted cross-layer designs
Opportunistic CSMA/CA for achieving multi-user diversity in wireless LAN
IEEE Transactions on Wireless Communications
Energy-efficient multi-polling scheme for wireless LANs
IEEE Transactions on Wireless Communications
Cross-Layer combining of adaptive Modulation and coding with truncated ARQ over wireless links
IEEE Transactions on Wireless Communications
Out-of-Band Signaling Scheme for High Speed Wireless LANs
IEEE Transactions on Wireless Communications
Improved VoIP capacity in mobile WiMAX systems using persistent resource allocation
IEEE Communications Magazine
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An advanced MAP transmission scheme for improving Media Access Control(MAC) overhead in the IEEE 802.16e systems is proposed. In the IEEE 802.16e system, when a Base Station(BS) broadcasts a MAP message, which is a control message about scheduling information, it applies a robust Modulation and Coding Scheme(MCS) level and allocates a large amount of radio resources, which induce a huge MAP overhead. Our proposed scheme utilizes piggybacked MAP IEs, in which control messages are concatenated with data packets and transmitted with the MCS level applied to data transmission. Due to the fact that the rate at which data is transmitted is generally higher than the rate at which broadcasting messages are transmitted, the proposed scheme can increase average data rate of a MAP transmission and consequently reduce the amount of resources allocated to the MAP transmission. Numerical analysis and simulations are presented to show that the MAP overhead is critical to system performance and can be improved by the proposed scheme.