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The throughput efficiency of a wireless mesh network with potentiallymalicious external or internal interference can be significantly improved byequipping routers with multi-radio access over multiple channels. For reliablymitigating the effect of interference, frequency diversity (e.g., channelhopping) and time diversity (e.g., carrier sense multiple access) areconventionally leveraged to schedule communication channels. However,multi-radio scheduling over a limited set of channels to minimize the effect ofinterference and maximize network performance in the presence of concurrentnetwork flows remains a challenging problem. The state-of-the-practice inchannel scheduling of multi-radios reveals not only gaps in achieving networkcapacity but also significant communication overhead.  This paper proposes an adaptive channel hopping algorithm for multi-radiocommunication, QuickFire MAC (QF-MAC), that assigns per-node, per-flow``local'' channel hopping sequences, using only one-hop neighborhoodcoordination. QF-MAC achieves a substantial enhancement of throughput andlatency with low control overhead. QF-MAC also achieves robustness againstnetwork dynamics, i.e., mobility and external interference, and selectivejamming attacker where a global channel hopping sequence (e.g., TSCH) fails tosustain the communication performance. Our simulation results quantify theperformance gains of QF-MAC in terms of goodput, latency, reliability,communication overhead, and jamming tolerance, both in the presence and absenceof mobility, across diverse configurations of network densities, sizes, andconcurrent flows.

QF-MAC: Adaptive, Local Channel Hopping for Interference Avoidance in Wireless Meshes