关键词: 无线传感器网络, 链路评估, 包接收率, 接收信号强度显示, 信噪比, 误比特率

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.