On providing fairness, QoS support and spectral efficiency in OFDMA/TDD environments

On providing fairness, QoS support and spectral efficiency in OFDMA/TDD environments Thanh N.H., Van Duc N., Hang L.T., Hanh D., Hung N.T., Tu T.A. Faculty of Electronics and Telecommunications, Hanoi University of Technology, 1 Dai Co Viet Rd., Hanoi, Viet Nam; Viettel Technologies, K2 Pham Hung Rd., Cau Giay, Hanoi, Viet Nam; State Agency for Technology Innovation, 26 Ly Thuong Kiet, Hanoi, Viet Nam Abstract: Modern wireless networks, such as WiMAX or LTE are using OFDM/OFDMA as the enabling technologies for broadband transmission in cellular environments with QoS capabilities. In these networks, such schema as radio resource management, admission control, scheduling are essential. In this article we firstly introduce a Time-Frequency Burst Mapping algorithm for radio resource management that improves the spectral efficiency of OFDMA/TDD channel. A Frame-based Weighted Fair Queueing (F-WFQ) Algorithm, which is a modified version of the conventional WFQ and suitable for operations in OFDMA/TDD environments is also proposed. When combining the two algorithms, we point out that the spectral efficiency can be maintained, while fairness, delay and proportional throughput of backlog sessions are greatly improved in comparison to the conventional Proportional Fair scheduling algorithm. ©2011 IEEE. Author Keywords: Fairness; Mapping; OFDMA; QoS; Resource allocation; Scheduling; TDD Index Keywords: A-frames; Admission Control; Broadband transmission; Cellular environment; Enabling technologies; Fairness; Mapping algorithms; OFDMA; Proportional fair scheduling algorithms; QoS; QoS support; Radio resource management; Spectral efficiencies; TDD; Time frequency; Weighted fair queueing; Communication channels (information theory); Conformal mapping; Natural resources management; Photomapping; Resource allocation; Scheduling algorithms; Spectrum analyzers; Wimax; Frequency division multiple access Year: 2011 Source title: International Conference on Information Networking 2011, ICOIN 2011 Art. No.: 5723182 Page : 218-223 Link: Scorpus Link Correspondence Address: Thanh, N. H.; Faculty of Electronics and Telecommunications, Hanoi University of Technology, 1 Dai Co Viet Rd., Hanoi, Viet Nam; email: [email protected] Conference name: International Conference on Information Networking 2011, ICOIN 2011 Conference date: 26 January 2011 through 28 January 2011 Conference location: Kuala Lumpur Conference code: 84335 ISBN: 9.78161E+12 DOI: 10.1109/ICOIN.2011.5723182 Language of Original Document: English

Abbreviated Source Title: International Conference on Information Networking 2011, ICOIN 2011 Document Type: Conference Paper Source: Scopus Authors with affiliations: 1. Thanh, N.H., Faculty of Electronics and Telecommunications, Hanoi University of Technology, 1 Dai Co Viet Rd., Hanoi, Viet Nam 2. Van Duc, N., Faculty of Electronics and Telecommunications, Hanoi University of Technology, 1 Dai Co Viet Rd., Hanoi, Viet Nam 3. Hang, L.T., Viettel Technologies, K2 Pham Hung Rd., Cau Giay, Hanoi, Viet Nam 4. Hanh, D., Faculty of Electronics and Telecommunications, Hanoi University of Technology, 1 Dai Co Viet Rd., Hanoi, Viet Nam 5. Hung, N.T., Faculty of Electronics and Telecommunications, Hanoi University of Technology, 1 Dai Co Viet Rd., Hanoi, Viet Nam 6. Tu, T.A., State Agency for Technology Innovation, 26 Ly Thuong Kiet, Hanoi, Viet Nam

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