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CROSS LAYER OPTIMIZATIONS FOR PERFORMANCE ENHANCEMENT IN WIRELESS NETWORKS

AHUJA, DISHA
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1201111828

Abstract Details

2008, MS, University of Cincinnati, Engineering : Electrical Engineering.
In this thesis, we focus on optimizing link layer performance and maximizing throughput in IEEE 802.11 wireless networks. We categorize our efforts into two directions: (a) throughput optimization and analysis of the 802.11 multi-rate networks via rate adaptation (b) design of a new MAC protocol for emerging multipacket reception capable wireless networks. Both our proposals assume cross layer interaction between the MAC and the PHY layers. In the first part of the work, we focus on the use of rate adaptation for throughput gains in time-varying wireless channels. We thoroughly investigate the impact of transmission rate on the performance of a wireless link. We then propose Stochastic Automata Rate Adaptation Algorithm (SARA) inspired by Stochastic Learning Automata (SLA), a machine learning technique for adaptation in random environments. Besides boosting throughput, SARA also provides an integrated and distributed solution for both stationary and non-stationary channel environments. SARA is completely compatible with existing IEEE 802.11 MAC standards. In the second part of the work, we move on to more advanced 802.11 networks that employ techniques like multiple antennas, DS-CDMA codes, spatial diversity techniques etc and have the capability of receiving multiple packets simultaneously. To provide the maximum performance benefits in these networks, we propose the use of a new MAC protocol Receiver-Based Multipacket Reception MAC (RB-MPR MAC) that relies on the use of a Multipacket Reception (MPR) matrix as cross-layer information. The application of MPR matrix, its benefits and limitations, impact of partitioning the network (Grouping) in a DS-CDMA system have been analyzed thoroughly and important results and interpretations have been put forward.
Dr. Dharma Agrawal (Advisor)
147 p.
Multipacket Reception; MPR matrix

Recommended Citations

Citations

  • AHUJA, D. (2008). CROSS LAYER OPTIMIZATIONS FOR PERFORMANCE ENHANCEMENT IN WIRELESS NETWORKS [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1201111828

    APA Style (7th edition)

  • AHUJA, DISHA. CROSS LAYER OPTIMIZATIONS FOR PERFORMANCE ENHANCEMENT IN WIRELESS NETWORKS. 2008. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1201111828.

    MLA Style (8th edition)

  • AHUJA, DISHA. "CROSS LAYER OPTIMIZATIONS FOR PERFORMANCE ENHANCEMENT IN WIRELESS NETWORKS." Master's thesis, University of Cincinnati, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1201111828

    Chicago Manual of Style (17th edition)

ucin1201111828
684
© 2008, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.