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http://dx.doi.org/10.7840/KICS.2011.36A.9.790

Performance Evaluation of Uplink ACK Packets Transmission IEEE 802.16e WiMAX Systems  

Jun, Kyung-Koo (인천대학교 임베디드시스템공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.36, no.9A, 2011 , pp. 790-795 More about this Journal
Abstract
The need for broadband wireless data networks such as IEEE 802.16e WiMAX systems increases as a variety of wireless information devices like smart phones are adopted rapidly in everyday life. Since most of mobile applications employ TCP as their transport layer protocol, the performance improvement of TCP in WiMAX systems is crucial. This paper proposes an efficient method to transmit uplink piggyback ACK packets by exploiting the uplink packet buffering which happens because of the resource allocation scheme of the WiMAX systems. The proposed method can support not only the ACK filtering but also the merging of the piggyback ACK packets. As a result, the bandwidth reduction in the piggyback ACK packet transmission leads to the improvement of the downlink throughput. The simulation results show that the bandwidth for the ACK packets reduces more than 90%, and the downlink throughput increases at least 30%.
Keywords
WiMAX; TCP downlink; throughput; ACK filtering; Piggyback;
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1 C. Chiang, W. Liao, T. Liu, et al., "Adaptive Downlink and Uplink Channel Split Ratio Determination for TCP-Based Best Effort Traffic in TDD-Based WiMAX Networks," IEEE Journal of Selected Areas in commu. Vol. 27, Iss.2, pp.182-190, Feb. 2009.   DOI   ScienceOn
2 Y. Chiu, S. Hardy and T. Randhawa, "A TCP-Driven MAC Resource Allocation Scheme in a WiMAX network," in Proc. of IEEE ICC, pp.1-5, 2009.
3 J. Wu, D. Kim and J. Mo, "TCP Performance over the WiBro Compatible 802.16e Systems," in Proc. of ICACT, pp.1752-1756, 2007.
4 B. Moon and J. Mo, "Optimizing Uplink TCP-ACK Transmission in WiMAX OFDMA Systems," IEEE Commu. Letters, Vol.12, No.4, pp.256-258, Apr. 2008.   DOI   ScienceOn
5 N. Lasfar, J. Mo and B. Moon, "TCP-ACK Triggered Bandwidth Request Scheme in IEEE 802.16e Systems," in Proc. of ICOIN, pp.1-5, 2009.
6 H. Wu, J. Wu, S. Cheng and J. Ma, "ACK Filtering on Bandwidth Asymmetry Networks," in Proc. of APCC.OECC, pp.176-178, Oct. 1999.
7 RFC-793 Transmission Control Protocol
8 http://www.scalable-networks.com
9 RFC-896 Congestion Control in IP / TCP Internetworks
10 IEEE 802.16-2005, "IEEE Standard for Local and metropolitan area networks - part 16: Air Interface for Fixed Broadband Wireless Access Systems," Feb. 2006.
11 http://www.3gpp.org
12 H. Balakrishnan and V. Padmanabhan, "How network asymmetry affects TCP," IEEE Commun. Mag., pp.60-67, Apr. 2001.
13 X. Yang, M. Venkatachalam, S. Mohanty, et al., "Exploiting the MAC Layer Flexibility of WiMAX to Systematically Enhance TCP Performance," In Proc. of Mobile WiMAX Symposium, pp.60-65, 2007.