Li Erran Li, Richard Alimi, Ramachandran Ramjee, Harish Viswanathan, Yang Richard Yang
Proceedings of IEEE Infocom Mini Symposium | April 2009
We present muNet, a wireless mesh network design and implementation to
harness the multiuser capacity of wireless channels. Traditionally,
media access control is designed to schedule one transmission between
one sender and one receiver without interference at any given
time. However, this design is suboptimal in terms of achieving the
multiuser capacity of multi-access wireless channels. In muNet, we
implement effective physical layer techniques called superposition
coding and successive interference cancellation to enable
simultaneous unicast transmissions from a single transmitter to
multiple receivers as well as from multiple transmitters to a single
receiver. We design the first practical MAC protocol that leverages
such a physical layer and exposes the multiuser capacity to upper
layers. We also present a simple, effective routing protocol that increases
simultaneous transmission opportunities for the MAC layer.
A proof-of-concept muNet is implemented on the GNU Radio platform.
Measurements on the implementation shows that the throughput gains
of muNet are significant (up to 93%).
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