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Effective Packet Transmission Scheme in Multirate WLAN  

Kim, Nam-Gi (삼성전자 정보통신총괄 통신연구소)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.2A, 2006 , pp. 168-175 More about this Journal
Abstract
To cope with channel variation, wireless networks such as IEEE 802.11 WLAN provide multiple transmission rates by employing different channel modulation and coding schemes. However, the coexistence of different transmission rates degrades the total system performance of the network. In order to eliminate this performance abnormality and improve protocol capacity, we propose a new Packet transmission algorithm, the RAT(Rate-Adapted Transmission) scheme. The RAT scheme distributes the wireless channel fairly based on the channel occupancy time. Moreover, it efficiently transmits packets even in a single station using rate-based queue management. Therefore, the RAT scheme obtains not only the inter-rate contention gain among stations but also the intra-rate contention gain among connections in a single station.
Keywords
WLAN; Ad Hoc networks; IEEE 802.11; Multirate transmission; Rate control; wireless packet scheduling;
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