Indian Journal of Science and Technology

Abstract

In multi-hop cellular networks, a channel that contributes the lowest relaying delay is proposed to the current node on the path. The current node itself does not receiving on the time-slot of the proposed channel that enhance the capacity and coverage problems of cellular networks. They also allow faster and cheaper deployment of cellular networks. A fundamental issue of these networks is packet delay because multi-hop relaying for signals is involved. An effective channel assignment is the key for the reducing delay. It proposes an optimal and a heuristic channel assignment scheme, called OCA and minimum slot waiting first (MSWF) respectively, for a time division duplex (TDD) wideband code division multiple access (W-CDMA) MCN. OCA provides an optimal solution in minimizing packet delay and can be used as an unbiased or benchmark tool for comparison among different network conditions or networking schemes. However, OCA is computationally expensive and thus, inefficient for the large real-time channel assignment problems. In this case, MSWF is more appropriate. Simulation results show that MSWF achieves on average 95% of the delay performance of OCA and is effective in achieving high throughput and low packet delay in conditions of different cell sizes. For improving more on the quality of service we can propose channel reuse. Using FDMA and TDMA we can reuse the channels. The novel feature of the proposed technique is that co-coordinated, prioritized TDMA is supported for clusters of access points (AP's) using measurement-based time slot assignments.
Keywords: Cellular network, MSWF, CSMA, OCA, channel assignment.