面向应用的短距离无线通信系统信道接入机制

自组方式短距离无线通信具有设备简单、使用方便及成本低等特点,因此成为研究和应用的热点,其信道接入是关键技术之一。针对短距离无线通信系统在现实应用中的信道接入问题,论述了两种信道接入机制———轮询方式和竞争方式。从工作原理、性能、优缺点等方面对这两种机制进行了比较,以系统成本、复杂度、性能指标等为参数分析了各自的应用。分析表明,两种信道接入机制各有特点,适合不同的条件,是实用的自组方式的无线接入方式。

Channel Access Mechanism in Application- Oriented Short Distance Wireless Communication System

Short distance wireless communication in the selforganizing pattern has the advantages such as simple equipment,convenient application,low cost,etc,so it has become the hotspot in the research and application fields.And its channel access is one of the key technologies.In this paper,to resolve the problem of channel access in the application of short distance wireless communication system,two mechanisms are discussed which are roll-call access and contention access.The two mechanisms are compared from the principles,performances,advantages and disadvantage.Then their applications are analyzed with the system cost,complexity,performance as the parameters.The analysis indicates that the two channel access mechanisms have different characters,and suit for different applications.In conclusion,they are practical wireless access modes in the self-organizing pattern.