  The throughput efficiency of a wireless mesh network with potentially
malicious external or internal interference can be significantly improved by
equipping routers with multi-radio access over multiple channels. For reliably
mitigating the effect of interference, frequency diversity (e.g., channel
hopping) and time diversity (e.g., carrier sense multiple access) are
conventionally leveraged to schedule communication channels. However,
multi-radio scheduling over a limited set of channels to minimize the effect of
interference and maximize network performance in the presence of concurrent
network flows remains a challenging problem. The state-of-the-practice in
channel scheduling of multi-radios reveals not only gaps in achieving network
capacity but also significant communication overhead.
  This paper proposes an adaptive channel hopping algorithm for multi-radio
communication, QuickFire MAC (QF-MAC), that assigns per-node, per-flow
``local'' channel hopping sequences, using only one-hop neighborhood
coordination. QF-MAC achieves a substantial enhancement of throughput and
latency with low control overhead. QF-MAC also achieves robustness against
network dynamics, i.e., mobility and external interference, and selective
jamming attacker where a global channel hopping sequence (e.g., TSCH) fails to
sustain the communication performance. Our simulation results quantify the
performance gains of QF-MAC in terms of goodput, latency, reliability,
communication overhead, and jamming tolerance, both in the presence and absence
of mobility, across diverse configurations of network densities, sizes, and
concurrent flows.
