  The increasing trend in wireless Internet access has been boosted by IEEE
802.11. However, the application scenarios are still limited by its short radio
range. Stub Wireless Multi-hop Networks (WMNs) are a robust, flexible, and
cost-effective solution to the problem. Yet, typically they are formed by
single radio mesh nodes and suffer from hidden node, unfairness, and
scalability problems.
  We propose a simple multi-radio, multi-channel WMN solution, named Wi-Fi
network Infrastructure eXtension - Dual-Radio (WiFIX-DR), to overcome these
problems. WiFIX-DR reuses IEEE 802.11 built-in mechanisms and beacons to form a
Stub WMN as a set of self-configurable interconnected Basic Service Sets
(BSSs). Experimental results show the improved scalability enabled by the
proposed solution when compared to single-radio WMNs.
