Adaptive Processing Gain Data Services in Cellular CDMA in Presence of Soft Handoff with Truncated ARQ
- 1 Department of Electronics & Communication Engg, Dr. B. C. Roy Engg College, Durgapur, India
- 2 Department of Electronics & Communication Engg, National Institute of Technology, Durgapur, India
Abstract
An adaptive data transmission scheme based on variable spreading gain (VSG) is studied in cellular CDMA network in presence of soft handoff (HO). The processing gain is varied according to traffic intensity meet-ing a requirement on data bit error rate (BER). The overall performance improvement due to processing gain adaptation and soft HO is evaluated and compared with a fixed rate system. The influence of soft HO pa-rameters on rate adaptation and throughput and delay performance of data is indicated. Further truncated automatic repeat request (T-ARQ) is used in link layer to improve the performance of delay sensitive ser-vices. The joint impact of VSG based transmission in presence of soft handoff at physical layer and T-ARQ at link layer is evaluated. A variable packet size scheme is also studied to meet a constraint on packet loss.
- K. Choi, S. Kim, Shin, and K. Cheun, “Adaptive proc-essing gain CDMA networks over poison traffic chan-nel,” IEEE Communications Letters, Vol. 6, No. 7, pp. 273-75, July 2002.
- K. Choi, Y. Chae, and J. Park, “Throughput-delay per-formance of interference level adaptive transmission in voice/data integrated CDMA network with variable spreading gain,” IEE Proceedings on Communications, Vol. 151, No. 3, pp. 217-220, June 2004.
- L. L. Yang and L. Hanzo, “Adaptive rate DS-CDMA systems using variable spreading factors,” IEEE Transac-tions on Vehicular Technology, Vol. 53, No. 1, pp. 72-81, January 2004.
- S. Kumar and S. Nanda, “High data rate packet communi-cation for cellular network using CDMA: Algorithms and performance,” IEEE Journal on Selected Areas in Commu-nications, Vol. 17, No. 3, pp. 472-491, March 1999.
- D. Wong and T. Lim, “Soft handoff in CDMA mobile system,” IEEE Personal Communications, pp. 6-17, De-cember 1997.
- H. Jiang and C. H. Davis, “Coverage expansion and ca-pacity improvement from soft handoff for cellular CDMA,” IEEE Transactions on Wireless Communica-tions, Vol. 4, No. 5, pp. 2163-2171, September 2005.
- J. Y. Kim and G. L. Stuber, “CDMA soft HO analysis in the presence of power control error and shadowing corre-lation,” IEEE Trans on wireless Communications, Vol. 1, No. 2, pp. 245-255, April 2002.
- Q. Liu, S. Zhou, and G. B. Giannakis, “Cross layer com-bining of adaptive modulation and coding with truncated ARQ over wireless links,” IEEE Transactions on Wireless Communications, Vol. 3, No. 5, pp. 1746-1755, September 2004.
- B. Lu, X. Wang, and J. Zhang, “Throughput of CDMA data networks with multi-user detection, ARQ and packet combining,” IEEE Transactions on Wireless Communi-cations, Vol. 3, No. 5, pp. 1576-1589, September 2004.
- J. Kim and M. Honig ,“Resource allocation for multiple class of DS-CDMA traffic,” IEEE Transactions on Ve-hicular Technology, Vo. l49, No. 2, pp. 506-518, March 2000.
- S. Kundu and S. Chakrabarti, “Performance of high rate data in wideband CDMA with correlated interferers,” in GESTS International Transactions on Communication & Signal Processing, Vol. 7, No. 1, pp. 53-64, June 2006.