【摘要】 在多跳分组无线网中使用码分多址 (CDMA)技术可以明显地降低隐终端问题对网络造成的影响 .码分配是多跳无线网中使用CDMA的基本问题 .码分配的目的在于提高扩频码的空间重用、降低分组冲突以及反映网络的动态变化 .本文提出了一种多跳无线网扩频码分配算法 ,证明了其正确性并与其它算法比较了复杂度 .与以往的算法追求降低码的数目不同 ,本算法是假设扩频码的数目有一定的冗余 ,寻求算法的方便、快捷和低通信开销更多还原

【Abstract】 The effects of hidden terminals on the network′s performance can be greatly reduced by using code division multiple access (CDMA) in multihop wireless networks.Code assignments are basic problems for using CDMA in the multihop wireless networks.The purposes of the code assignments are to improve the ratio of spatial reuse of spreading codes,to reduce the possibility of packet collisions and to response to the change of topology.In this paper,a new distributed algorithm is proposed to assign codes for dynamic,multihop wireless networks,and its correctness is proved.Its complexities are compared with those of other algorithms.Being different from the previous algorithms,which minimize the number of codes used,this algorithm is supposed that the number of spreading codes is enough.We seek for an algorithm,which is implemented easily, runs quickly,and reduces the cost of communication.更多还原