物联网距离和业务特征结合的频谱接入方法

Opportunistic spectrum accessing joint distance with service characteristics in IOT networks

针对物联网应用中的频谱使用特性提出一种距离和业务结合的频谱接入方法。首先根据非系统用户与系统用户的距离关系构建用于标识系统用户信道可用度的列表,以此提供非系统用户间的资源分配等级。其次,根据非系统用户和系统用户对信道使用特性建立业务匹配关系式,在可用度列表和业务匹配关系式的基础上,构建干扰驱动效用函数,从跨层优化角度设计频谱接入方法。结果证明该方案既能够抑制非系统用户对系统用户干扰,又能够确保物联网应用的服务质量的资源共享。

An accessing scheme which combines distance with service for the applications in IOT networks was proposed.First,a channel-availability list based on the distance relationship between system and non-system users was built.The list provided a priority of each channel for non-system users.Then the service-matched expression between the IOT user and the liscensed user was proposed.Based on the list and the expression,a interfrence-driven utility function was de-fined.Finally,the accessing scheme was optimized from the cross-layer design point of view.It was proved that the scheme guaranteed both the interference suppression and the resource sharing in IOT based on the QoS requirements.