基于归一化吞吐量的CDMA Ad hoc网络传输范围优化

针对CDMA Ad hoc网络节点传输范围优化问题,提出了基于归一化吞吐量的节点最优传输范围分析模型,推导出了不同扩频码分配机制下的节点最优传输范围。数值结果表明,与基于前向进阶尺度模型获得的最优网络参数相比,基于归一化吞吐量分析模型获得的节点最优传输范围变小而节点最优发送概率增大,进而导致单个节点的传输性能降低而整个网络的传输性能提高。扩频码分配机制影响节点最优传输范围的选取,在基于接收机的扩频码分配机制下,节点最优传输范围较大。

Optimal transmission range for CDMA Ad hoc networks based on normalized throughput

An analyt ical model for determining the opt imal t ransmission rang e of CDMA ad hoc netwo rks w as presented by int roducing the concept of normalized thr oug hput . T he presented model w as used to derive the v alues o f the opt imal t ransmission range under v ar io us spreading code protocols. Numer ical result s show that , in cont rast to the model based on the expected forw ard prog ress ( EFP) met ric, the presented model prov ides hig her o pt imum t ransmission probability and narrow er optimum t ransmission range, and as a co nsequence, the netw ork t ransmission performance is improved at the cost of degr ading the terminal performance. Addit ionally, the spreading code protocols have significant ef fect s on the opt imal tr ansmission r ange, and the optimal t ransmission rang e is lar ger under the r eceiver-based spreading co de pr otoco l.