An Adaptive MAC Protocol for MC-CDMA adhoc Wireless LAN
Authors: Orfanos, Georgios and Walke, Bernard and Butsch, Willi
Department of Communication Networks (ComNets), Faculty 6, RWTH Aachen University
: Georgios Orfanos
In Proceedings of 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications, p. 8, Berlin, Germany, 2005.
Publication Date: Sep, 2005
On page(s):8
ISBN: 3-8007-2909-1
Abstract Multi-Carrier Code Division Multiple Access (MC-CDMA), a novel, high capacity, multicarrier modulation scheme, is developing to a key radio transmission technology for future Wireless Local Area Networks (W-LANs). However in adhoc Code Division Multiple Access (CDMA) networks near-far effects can block a receiver due to high interference. These effects occur when a receiving station is closer to an interferer than to its corresponding transmitter. Accordingly, the receiver cannot detect the intended signal out of the received one and the data transmission fails. In this work, we present an adaptive Medium Access Control (MAC) protocol for adhoc MC-CDMA based W-LANs, based on the IEEE 802.11 MAC protocol. The new protocol has the ability to overcome the near-far-problem by employing a frequency adaptation method. The key of the proposed method is an interference estimate built at each receiving Mobile Station (MS). Aided by its estimate, a MS can calculate whether the Quality of Service (QoS) expectations of the incoming link can be accomplished. If the interference is too high, the receiving MS initiates a frequency channel change and informs the corresponding transmitter over the control packets about the Id of the new channel. It is shown that this concept can deploy the high capacity characteristics of MC-CDMA in wireless environments.
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@INPROCEEDINGS{OrWaReBu_PIMRC2005,
AUTHOR = {Orfanos, G. and Walke, B. and Butsch, W.},
TITLE = {An Adaptive MAC Protocol for MC-CDMA adhoc Wireless LAN},
YEAR = {2005},
MONTH = {Sep},
PAGES = {8},
ADDRESS = {Berlin, Germany},
BOOKTITLE = {Proceedings of 16th Annual IEEE International Symposium on Personal
Indoor and Mobile Radio Communications},
AFFILIATION = {Department of Communication Networks (ComNets), Faculty 6, RWTH Aachen University},
ISBN = {3-8007-2909-1},
URL = {https://www.comnets.rwth-aachen.de}
}
Signature in CN-Library = {QI002 (2005)}