On the benefits of Cross Layer Feedback in Multi-hop Wireless Networks

harkirat singh

Abstract


Wireless networks operate under harsh and time-varying channel conditions.
In wireless networks the time varying channel conditions lead to variable SINR and high BER.
The wireless channel is
distinct from and more unpredictable than the far more reliable wireline channel.
{\em Cross layer feedback} is a mechanism where layers provide {\em selective} information to other
layers to boost the performance of wireless networks.
{\em Cross layer feedback} can lead to a tremendous increase in the performance
of the TCP/IP stack in wireless networks, and an increase in the user's satisfaction level.
However, it is possible that naive feedbacks (or optimizations) can work non-coherently;
therefore, these can negatively effect the performance of the TCP/IP stack. In this paper, we holistically analyze
each layer of the TCP/IP stack, and propose possible Cross layer feedbacks which work coherently. The proposed Cross layer
feedbacks can greatly enhance the performance of the TCP/IP stack in wireless networks.

Keywords


Cross layer, WLAN, Multi-hop, Wireless networks,

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