TY - GEN
T1 - Relay-enhanced cellular performance of OFDMA-TDD system for mobile wireless broadband services
AU - Park, Kyungmi
AU - Kang, Chung G.
AU - Chang, Daeyoung
AU - Song, Seungho
AU - Ahn, Jongguk
AU - Ihm, Jongtae
PY - 2007
Y1 - 2007
N2 - Multi-hop relay (MR) and repeater are useful means of improving system throughput and coverage in the cellular mobile packet access system, as carrier-to-interference ratio can be improved with deploying them in the heavily shadowed region. In this paper, we investigate the bandwidth efficiency and the associated service outage performance for the different relay scenarios, using the system level simulation for a cellular OFDMA-TDD system. It is demonstrated that a capacity gain by an optical repeater which has a simple amplify-and-forwarding capability only could be minimal due to co-channel interference from all repeaters in the neighbor cells, even though they are usually useful for warranting the outage performance with a multiple order of combining gain, especially in the destructive area, e.g., edge of sub-cell coverage. Meanwhile, multi-hop relays are shown to increase the average system capacity (almost doubling the system throughput) by fully reusing the frequency in every relay station, while improving the per-user data rate in the cell edges or heavily shadowed areas.
AB - Multi-hop relay (MR) and repeater are useful means of improving system throughput and coverage in the cellular mobile packet access system, as carrier-to-interference ratio can be improved with deploying them in the heavily shadowed region. In this paper, we investigate the bandwidth efficiency and the associated service outage performance for the different relay scenarios, using the system level simulation for a cellular OFDMA-TDD system. It is demonstrated that a capacity gain by an optical repeater which has a simple amplify-and-forwarding capability only could be minimal due to co-channel interference from all repeaters in the neighbor cells, even though they are usually useful for warranting the outage performance with a multiple order of combining gain, especially in the destructive area, e.g., edge of sub-cell coverage. Meanwhile, multi-hop relays are shown to increase the average system capacity (almost doubling the system throughput) by fully reusing the frequency in every relay station, while improving the per-user data rate in the cell edges or heavily shadowed areas.
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U2 - 10.1109/ICCCN.2007.4317857
DO - 10.1109/ICCCN.2007.4317857
M3 - Conference contribution
AN - SCOPUS:40949149607
SN - 9781424412518
T3 - Proceedings - International Conference on Computer Communications and Networks, ICCCN
SP - 430
EP - 435
BT - Proceedings of 16th International Conference on Computer Communications and Networks 2007, ICCCN 2007
T2 - 16th International Conference on Computer Communications and Networks 2007, ICCCN 2007
Y2 - 13 August 2007 through 16 August 2007
ER -