An Approach to Improve the Quality of Service in OFDMA Relay Networks via Re-transmission
Journal Title: IOSR Journals (IOSR Journal of Computer Engineering) - Year 2015, Vol 17, Issue 6
Abstract
Abstract: With the next-generation cellular networks making a transition toward smaller cells, two-hop orthogonal frequency-division multiple access (OFDMA) relay networks have become a dominant, mandatory component in the 4G standards (WiMAX802.16j, 3GPP LTE-Adv.). Here we are using the multicasting strategy Given the growing importance of multimedia broadcast and multicast services (MBMS) in 4G networks, the latter forms the focus of this project. The main aim of this project is to improve the performance of the OFDMA based relay networks. The OFDMA transmission Scheme is a widely accepted scheme for improving the quality and speed of communication over the 4G cellular network. There are two different models designed for OFDMArelay networks .Distributed (DP) and Contiguous (CP) permutations. We are checking the performance of two algorithms The linear programming algorithm and the greedy algorithm by using two models of OFDMA for multicast scheduling and after performance evaluation we select the best model and the algorithm for transmission. We further improve the throughput via retransmission of lost packets during data transfer over the specified network. We can detect the packet loss by packet synchronization technique and a request will be sent by the destination for re-sending the lost packets which is called as Re-Transmission.[1]
Authors and Affiliations
Avanti Anarth , Ms. Rashmi Jain
Keywords
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