Browse > Article

Enhanced WMAN System based on Region and Time Partitioning D-TDD OFDM Architecture  

Kim, Mee-Ran (Dept. of Information Electronics Engineering, Ewha Womans University)
Cheong, Hee-Jeong (Dept. of Information Electronics Engineering, Ewha Womans University)
Kim, Nak-Myeong (Dept. of Information Electronics Engineering, Ewha Womans University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.43, no.11, 2006 , pp. 68-77 More about this Journal
Abstract
In accommodating the asymmetric traffic for future wireless multimedia services, the dynamic time division duplexing (D-TDD) scheme is considered as one of the key solutions. With the D-TDD mode, however, the inter-BS and inter-MS interference is inevitable during the cross time slot (CTS) period, and this interference seriously degrades the system performance. To mitigate such interference, we propose a region and time partitioning D-TDD architecture for OFDM systems. Each time slot in the CTS period is split into several minislots, and then each cell is divided into as many regions as the number of minislots per time slot. We then assign the minislots only to the users in its predefined corresponding region. On top of such architecture which inherently separates the interfering entities farther from each other, we design a robust time slot allocation scheme so that the inter-cell interference can be minimized. By the computer simulation, it has been verified that the proposed scheme outperforms the conventional time slot allocation methods in both the outage probability and the bandwidth efficiency.
Keywords
dynamic time division duplexing; time slot allocation; cross time slot; orthogonal frequency division multiple access;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Guidellines for Evaluation of Radio Transmission Technologies for IMT-2000, Recommendation ITU-R M.1225, 1997
2 A. J. Goldsmith, and S.-G. Shua, 'Variable-rate Variable-power MQAM for Fading Channels,' IEEE Trans. Commun., vol. 45, October, 1997   DOI   ScienceOn
3 Angeliki Alexiou, Sangboh Yun, et al., 'Duplexing, Resource Allocation and Inter-cell Coordination-Design Recommendations for Next Generation Systems,' WWRF White Paper, October, 2004
4 Simon Haykin, and Michael Moher, Modem Wireless Communications, Prentice Hall, 2005
5 H. Holma, and M. Kavehrad, 'Dynamic-TDD and Optimum Slot-Allocation in Fixed Cellular Systems,' VTC 2001 Fail, vol. 1, pp. 37-41, 2001   DOI
6 J. C.-I. Chuang, 'Performance limitations of TDD wireless personal communications with asynchronous radio ports,' Electron. Letters, vol.28, pp. 532-534, March 12, 1992   DOI   ScienceOn
7 Sung-Hong Wie, and Dong-Ho Cho, 'Time Slot Allocation Scheme based on a Region Division in CDMA/TDD Systems,' VTC 2001 Spring, vol. 4, pp. 2445-2449, 2001   DOI
8 Nasreddine, J., and Lagrange, X., 'Time Slot Allocation Based on a Path Gain Division Scheme for TD-CDMA TDD Systems,' VTC 2003 Spring, vol. 2, pp. 1410-1414, 2003   DOI