DocumentCode :
1954745
Title :
Integrated scheduling and interference coordination in cellular OFDMA networks
Author :
Necker, Marc C.
Author_Institution :
Institute of Communication Networks and Computer Engineering, University of Stuttgart, Pfaffenwaldring 47, D-70569, Germany
fYear :
2007
fDate :
10-14 Sept. 2007
Firstpage :
559
Lastpage :
566
Abstract :
The currently emerging 802.16e (WiMAX) and 3GPP Long Term Evolution (LTE) cellular systems are based on Orthogonal Frequency Division Multiple Access (OFDMA). OFDMA suffers from heavy inter-cell interference if neighboring base stations use the same frequency range. One possible approach to solve this issue is the application of beamforming antennas in combination with interference coordination (IFCO) mechanisms between base stations. In this paper, we trace the problem of IFCO back to the graph coloring problem and investigate the achievable resource utilization of the interference coordinated system. We develop a heuristic that allows the combination of arbitrary scheduling algorithms with the IFCO mechanism. This allows an efficient utilization of the radio system’s frequency resources while still obeying scheduling constraints, such as Quality of Service requirements. Finally, we study the tradeoff between fairness and the total system throughput.
Keywords :
Array signal processing; Base stations; Cellular networks; Frequency conversion; Interference constraints; Long Term Evolution; Quality of service; Resource management; Scheduling algorithm; WiMAX; 3GPP LTE; 802.16e; OFDMA; WiMAX; beamforming; graph coloring; interference coordination; scheduling;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Broadband Communications, Networks and Systems, 2007. BROADNETS 2007. Fourth International Conference on
Conference_Location :
Raleigh, NC, USA
Print_ISBN :
978-1-4244-1432-1
Electronic_ISBN :
978-1-4244-1433-8
Type :
conf
DOI :
10.1109/BROADNETS.2007.4550483
Filename :
4550483
Link To Document :
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