基于博弈论的空时频谱共享:动态接入与惩罚策略OACSCDCSTPCD

To tackle the challenge of inefficient utilization of spatiotemporal spectrum resources in heterogeneous net-works,a reliable spectrum sharing strategy based on game theory was proposed for scenarios where multiple secondary users dynamically access through sensing spatiotemporal spectrum opportunities.Firstly,secondary users sensed the ac-tivity state of primary users through channel sampling and subsequently seek suitable spatiotemporal spectrum opportuni-ties.Each secondary user aimed to access more spectrum resources while preventing quality degradation between primary users.Consequently,a negotiation of individual utilities between secondary and primary users was needed,in order to reach a mixed Nash equilibrium.When the secondary user's transmission power was abnormal,its behavior would be re-garded as a violation.Then,a backoff time compensation algorithm was presented to penalize the secondary users,ac-cording to the number of violations and active nodes in the network.Finally,simulation results validate the effectiveness of the spatiotemporal spectrum opportunities sharing strategy with the penalty mechanism.