Optimal bandwidth allocation and stability of high-speed networks for CSMA/CD protocols

In this paper, we examine a non-persistent CSMA/CD protocol for high-speed communication systems, where the bandwidth is divided into two separate asymmetric channels. Free stations access the first channel while all retransmissions occur in the second channel. We define the stability regions and the rules for optimal bandwidth allocation among the two channels for optimization of the system performance in case of infinite population. Numerical results show that the optimal behaviour gives performance improvement as compared with the single-channel system with the same capacity.