Title :
A comparison of orthogonal and overlapped relay subchannel allocation schemes for OFDMA based systems
Author :
Cho, Youngmin ; Byun, Dae Wook ; Jang, Seung-Hun ; Yang, Janghoon ; Kim, Dong Ku
Author_Institution :
Sch. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
Abstract :
This paper investigates the comparison of two different channelization schemes of relay links in the relay aided cellular network for different transmit power and the number of relays. One is the orthogonal relay subchannel allocation (ORRSA) which assigns each relay links to mobiles with orthogonal subchannels, leading to no interference between relays in the same cell. The other is the overlapped relay subchannel allocation (OVRSA) that maximizes spectral efficiency by allowing each relay to share same subchannels among them. Simulation results show that ORRSA provides slightly better cell throughput over OVRSA in multiple cell environment and both schemes of being investigated show cell throughput increases as the number of RSs per cell increases. Finally, it is observed that RS transmit power has little influence on the cell throughput performance.
Keywords :
4G mobile communication; OFDM modulation; cellular radio; quality of service; 4G mobile communication system; OFDMA based systems; ORRSA; OVRSA; QoS; channelization schemes; orthogonal relay subchannel allocation; overlapped relay subchannel allocation; relay aided cellular network; Base stations; Decoding; Downlink; Interference; Land mobile radio cellular systems; Power system relaying; Relays; Resource management; Telecommunication network reliability; Throughput; IEEE 802.16m; decode-and-forward (DF); resource allocation;
Conference_Titel :
Computer and Automation Engineering (ICCAE), 2010 The 2nd International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-5585-0
Electronic_ISBN :
978-1-4244-5586-7
DOI :
10.1109/ICCAE.2010.5451396
