Authors: Shweta R. Malwe; G.P. Biswas
Addresses: Department of Computer Science and Engineering, Indian School of Mines, Dhanbad (JH) – 826004, India ' Department of Computer Science and Engineering, Indian School of Mines, Dhanbad (JH) – 826004, India
Abstract: Cross-layered technique performs better over centralised CDMA networks. This paper proposed a Routing-MAC cross-layer design for establishing source-destination route along with code assignment for CDMA-MAC implementation. Since the routing is dynamic, the proposed route and code-assignment results in efficient deployment of the network. Some improvements in terms of other parameters like code assignment complexity, code requirement, control overhead, etc. are also made. The pairwise code assignment (PCA) scheme is followed and three different approaches such as route-based, source-based and source-destination based PCA are proposed. A new wireless communication model comprising periodic mobility of nodes, dynamic formation of topology, routing and assignment of codes including data transmission as a cycle is proposed. The schemes are simulated on traditional and proposed network model, and improved performance regarding code-requirement and - confliction are achieved. Also the routing implemented on the proposed network model is found to be better than other wireless routing protocols.
Keywords: CDMA networks; code division multiple access; MAC; medium access control; PCA; pairwise code assignment; cross-layering; periodic mobility; communications modelling; DSR; dynamic source routing; wireless ad hoc networks; wireless networks; simulation; wireless routing protocols.
International Journal of Ad Hoc and Ubiquitous Computing, 2016 Vol.21 No.4, pp.245 - 258
Received: 30 Dec 2014
Accepted: 07 Jul 2015
Published online: 05 May 2016 *