Improved multiple access schemes for very high speed optical fiber local area network using a passive star topology

A number of random-access protocols were introduced and analyzed by I.M.I. Habbab et al. (1987) for a very high-speed optical data network based on a passive star topology. The author provides a number of more efficient protocols for the same hardware architecture and characterizes their improved performance. In particular, he concentrates on the most simple algorithms which are based on the ALOHA protocol and do not require any kind of carrier sensing. Their performance is independent of a, the normalized propagation time of packets over the optical medium. This property is rather important when dealing with very high speed data networks which result in high values of a , because the performance of the convenient carrier sensing schemes is poor under such conditions. The protocols presented perform better than the corresponding protocols of Habbab et al. for all values of system parameters