Go to Project's Main Webpage:

Donwload Code: Software


This project presents the design and implementation of 802.11n+, a fully distributed random access protocol for MIMO networks. 802.11n+ allows nodes that differ in the number of antennas to contend not just for time, but also for the degrees of freedom provided by multiple antennas. We show that even when the medium is already occupied by some nodes, nodes with more antennas can transmit concurrently without harming the ongoing transmissions. Furthermore, such nodes can contend for the medium in a fully distributed way. Our testbed evaluation shows that even for a small network with three competing node pairs, the resulting system about doubles the average network throughput. It also maintains the random access nature of today’s 802.11n networks.


Random Access Heterogeneous MIMO Networks
Kate Lin, Shyamnath Gollakota and Dina Katabi


Kate Ching-Ju Lin
CITI, Academia Sinica

Shyamnath Gollakota
Massachusetts Institute of Technology

Dina Katabi
Massachusetts Institute of Technology

NSF Logo DARPA Logo SMART Logo Wireless center Logo SRC Logo