一种改进型防止策略性操纵的信道分配协议

An Improved Channel Allocation Protocol in Prevention of Strategic Manipulation

针对认知无线电信道分配过程中作弊次用户(SU)对未作弊SU性能存在影响的问题,利用最适交易循环(TTC)匹配理论,提出一种名为改进TCC的信道分配协议(ITTC)。ITTC按照SU对于信道的喜好排序进行分配,将改变真实喜好列表排序的行为视为作弊。SU作弊只能获得更差的分配性能,未作弊者获得不低于原来性能的分配结果,从而有效解决因作弊造成的不公平性。为定量分析ITTC的分配性能,设计并使用了一种量化SU分配结果的评估方法(PEM-SU)。PEM-SU对PU网络以及SU数据包到达、分配、传输过程进行设置,将分配结果转化为统一形式进行性能量化。利用PEM-SU与二次申请延时接收协议(SPDA)和TTC协议的对比,结果表明,ITTC在平均吞吐量、时延、队长和拒绝率上均优于SPDA和TTC,且能够有效防止策略性操纵,保护未作弊SU的利益。

In view of cheating behavior of the secondary user(SU)affecting the performance of non-cheating SU in the process of cognitive radio channel allocation,a channel allocation protocol named the improved top trading cycles(ITTC)is proposed according to the top trading cycle(TTC)matching theory.The ITTC allocates channels according to the preference ranking of SUs,and the behavior of changing the ranking of the true preference list is in consideration of cheating.The cheating SUs can only obtain worse allocation performance,while non-cheating SUs can obtain the same or even better allocation results than before,effectively solving the unfairness caused by cheating.For quantitatively analyzing the allocate performance indicators,a performance evaluation method of SU(PEM-SU)is designed.PEM-SU configures the PU network,as well as the arrival,distribution,and transmission of SU,and unifies the results into a form that can be quantified for performance.The experimental results compared with the secondary proposed deferred acceptance(SPDA)protocol and TTC protocol show that the ITTC is prior to SPDA and TTC in the average throughput,average latency,average queue length and average rejection rate.And also can effectively prevent strategic manipulation and protect the interests of non-cheating SUs.