The Performance of Optical Networks with TDMA

Due to the traditional realization of distributed-queue dual-bus (DQDB) networks, the optical network with the technique of time-division multiple access (TDMA) has the unfair-access problem. This problem protects users from adopting optical TDMA networks. In order to establish a fair-access medium-sharing environment on optical networks, this paper analyzes the performance of full-load TDMA networks. The performance that is exploited to estimate nodal access indicates the average waiting time of TDMA nodes. After deducing the average waiting time on optical TDMA networks, it is exhibited that the average waiting time of a node is in inverse proportion to nodal traffic regardless of network topology. Based on the deduction, it can be inferred that an optical TDMA network inherently has ideal fair behavior. This property can be manifested if the access protocol of the optical TDMA network performs traffic control. Referring to the property of the waiting time, the optical TDMA network can be considered as a subnetwork of the public. On the other hand, the unfair-access problem of DQDB networks will become solvable. Therefore, DQDB networks should be available in future.