A code allocation protocol for maximizing throughput in CDMA based ad hoc networks

Abstract

We consider here the problem of allocating variable length orthogonal codes in an ad hoc network based on CDMA. We consider a snapshot version of the problem at some instant. It had been proved earlier than even for a static set of communications and topology the problem is intractable. A greedy algorithm is stated to provide a bounded approximation to the throughput maximizing optimal allocation. We present a simple distributed code allocation protocol based on the greedy approximation. Simulation experiments show the enhanced throughput obtained by our protocol as compared to other code allocation schemes. © 2003 IEEE.