Secrecy system power allocation method capable of satisfying requirements on time delay QoS (Quality of Service)

Abstract

The invention discloses a secrecy system power allocation method capable of satisfying requirements on time delay QoS (Quality of Service) and belongs to the technical field of wireless communication. In the method, a safe effective capacity concept is proposed; based on a safe effective capacity model, upper layer user service quality limits (time delay QoS) are introduced into a traditional secrecy system by cross layer joint optimization; besides, the performance optimization of the secrecy system and the maximization of resource utilization are achieved when different time delay QoS limits are met. As for the optimization problem, an optimal dual factor is obtained through the principle of Lagrange duality by taking a safe effective capacity as an objective function and a limited average power as a limit condition, and then an optimal power control factor is obtained, so that optimal power allocation is realized. By virtue of the method, the traditional secrecy system meets the requirements on the upper layer user service quality and the energy efficiency of the system is maximized; the method has important theoretical and practical significance.

Description

technical field [0001] The invention relates to a method for allocating power of a security system that guarantees time delay and QoS requirements, and belongs to the technical field of wireless communication. Background technique [0002] Communication security has always been an important measure of communication quality. With the rapid development of wireless communication, network communication has put forward higher requirements for security. In recent years, the physical layer resources of wireless communication systems have been continuously enriched. It has become a hot spot to ensure the security of wireless communication by utilizing the diversity and uniqueness of physical layer resources, and the physical layer security technology has been continuously developed. [0003] In wireless communication network transmission, QoS (Quality of Service) plays an important role. How to achieve a balance between limited wireless resources and the ever-increasing QoS requirem...

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Problems solved by technology

"Quality-of-Service Driven Power and Rate Adaptation over Wireless Links" (power and rate adaptation based on QoS requirements in wireless links) [IEEE Transactions on Wireless Communications, vol.6, no.8, pp.3058-3068, Aug.2007.] This article discusses the matching of wireless link power and rate based on QoS requirements, but it does not consider the security of the system. At present, there is still no research on the performance of QoS security systems based on effective capacity. precedent

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