【摘要】 针对无线传感器网络路由协议的仿真和设计,往往是假设底层信道为理想信道,以此所设计出的路由协议在实际应用中将导致极低的网络性能问题.以CC2420收发芯片为重点研究对象,对其所在的2.4GHz的通信链路进行了理论建模,得出了一个解析的链路评估模型.该模型具有一定的扩展性,对于不同的环境和不同的节点收发芯片,只须将相应的模型参数代入相应的接收机误码率公式,便可得出所需的链路评估模型.其推导过程具有一般性,所得评估模型可为无线传感器网络的底层链路仿真提供理论依据,并可为上层协议的分析及设计提供有价值的参考.更多还原

【Abstract】 It is often assumed that the bottom channel is an ideal one in routing protocol simulation and design of wireless sensor networks.As a result,the routing protocol thus designed causes a very low performance of network in practical applications.The problem is,therefore,considered to solve by developing an evaluation model for 2.4GHz communication link with the CC2420 transceiver chip taken as a target.The analytic model is extensible to a certain degree,by which a required link evaluation model is available to any transceiver chips in different environment or at different network nodes by way of substituting simply the relevant model parameters into the corresponding receiver BER formula.The deriving process of the evaluation model is based on generic conditions,so the model is acceptable theoretically by most of bottom channel link simulation for wireless sensor networks and can provide reference for the protocol analyzers and designers at higher level.更多还原