Non-uniform Traffic Conditions Research Articles

A cost-effective reliable multipath interconnection network

A new class of multistage interconnection networks is proposed. A network in this class consists of a standard multistage network, such as an omega network, augmented by multiplexers at the source nodes and demultiplexers at the destination. In addition, the first several stages are capable of adapting their routing decisions to avoid faults elsewhere in the network. The terminal reliability of this network is derived, and it is shown to have superior reliability, at a much lower cost than previous networks of similar fault tolerance. It is demonstrated that the proposed network's probability of acceptance, a common measure of performance for circuit-switched networks, is comparable to other networks of similar cost, but the greater number of paths it provides between source and destination should give it better performance under non-uniform traffic conditions.

Comparisons of channel-assignment strategies in cellular mobile telephone systems

Two novel channel-assignment strategies are proposed: the locally optimized dynamic assignment (LODA) strategy and the borrowing with directional channel-locking (BDCL) strategy. Their performance is compared with the fixed-assignment (FA) strategy (currently used on certain systems) and the borrowing with channel ordering (BCO) strategy (the strategy that has given the lowest blocking probability in previous research). Computer simulations on a 49-cell network for both uniform and nonuniform traffic showed that the average call-blocking probability of the BDCL strategy is always the lowest. The LODA performance is comparable with that of BCO under nonuniform traffic conditions but is inferior under uniform traffic conditions.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>