Power Control in Contention-Based Access for Haptic Communication: A Potential Game Approach

Haptic communication enables immersive interactive experience for users, but it places high demands on low latency and high reliability. While ultra-reliable low-latency communications (URLLC) can provide this support, it is not consistent for haptic communication due to the nature of haptic date with perceptible differences and the delay generation in spectrum access. With this in mind, we propose a framework for contention-based access for haptic communication. First, we use contention-based access to reduce the latency caused by resource scheduling during spectrum access. Second, we design the rate capacity of the uplink and downlink by transmission with perceptible differences. Furthermore, we formulate an optimization problem for power control. The problem is transformed into a non-cooperative game and theoretically proved to be an exact potential game. To solve this game problem, we propose a power control algorithm with stochastic sequence space adaptive play (SAP) to obtain pure strategy Nash equilibrium (NE) at low complexity. Finally, simulation results show that the proposed game model and algorithm achieve high transmission reliability with low latency.