MAC LAYER RETRANSMISSIONS IN 1XTREME
Abstract:
Abstract- In this paper, we study the joint reliability as offered by the medium access control (MAC) and the radio link protocol (RLP) in CDMA systems, particularly for 1XTREME. The retransmission mechanism in the RLP has considerable amount of delay associated with it which might not be able to sustain real-time communications with strict delay requirements. Retransmissions done at a lower layer, such as the MAC, enhances the performance of the system. We show how the performance varies with respect to delay and throughput as observed from the RLP, for finite number of retransmissions at the MAC. We find that there is a substantial gain in the performance with the incorporation of fast retransmissions at the MAC. Synthetically generated HTTP traffic was used as the application, the objects of which were fragmented into equal sized RLP frames. We consider a 1-path Rayleigh fading channel with correlated errors. We also consider that soft packet combining at the receiver is supported, which effectively lowers the frame error rate (FER). Simulation experiments are conducted to verify the performance as offered by the MAC and the RLP.
Citations
| 438 | I-TCP: Indirect TCP for Mobile Hosts – Bakre, Badrinath - 1995 |
| 252 | Improving the performance of reliable transport protocols in mobile computing environments – Caceres, Iftode - 1995 |
| 34 | A behavioral model of web traffic – Choi, Limb - 1999 |
| 18 | Performance evaluation of TCP/RLP protocol stack over CDMA wireless link – Bao - 1996 |
| 14 | Performance of TCP/RLP protocol stack on correlated fading DS-CDMA wireless links – Chockalingam, Bao - 2000 |
| 6 | A Diversity Combining DS/CDMA System with Convolutional Encoding and Viterbi Decoding – Souissi, Wicker - 1995 |
| 2 | Service Options for Spread Spectrum Systems: Radio Link Protocol – 2 - 1999 |
| 1 | Evolving the capabilities of IS-2000: an overview of – Fry, Mandyam |
