  Engineers have numerous low-power wireless sensor devices in the current
network setup for the Internet of Things, such as ZigBee, LoRaWAN, ANT, or
Bluetooth. These low-power wireless sensors are the best candidates to transfer
and collect data. But they are all vulnerable to the physical jamming attack
since it is not costly for the attackers to run low power jammer sources in
these networks. Having multiple gateways and providing alternative connections
to sensors would help these networks to mitigate successful jamming. In this
paper, we propose an analytical model to solve the problem of gateway selection
and association based on a Stackelberg game, where the jammer is the follower.
We first formulate the payoffs of both sensor network and attacker and then
establish and prove the conditions leading to NASH equilibrium. With numerical
investigation, we also present how our model can capture the performance of
sensor networks under jamming with a varying number of gateways. Our results
show that compared to the single gateway scenario, the network's throughput
will improve by 26% and 60% when we deploy two and four gateways in the
presence of a single jammer.
