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학술지 A Multi-Layered OFDM System with Parallel Transmission for Multicell Cooperative Cellular Networks
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저자
Jiaxin Yang, Xianbin Wang, 박성익, 김흥묵
발행일
201203
출처
EURASIP Journal on Wireless Communications and Networking, v.2012, pp.1-18
ISSN
1687-1499
출판사
Hindawi Publishing, Springer
DOI
https://dx.doi.org/10.1186/1687-1499-2012-103
협약과제
11PR2700, 지상파 DTV 전송효율 고도화 기술개발, 김흥묵
초록
Recent development in multicell cooperation poses significant technical challenges to the design of robust and flexible transmission techniques. A new multi-layered orthogonal frequency-division multiplexing (ML-OFDM) system is proposed in this article to provide a dynamic platform for multicell cooperation with efficient base station coordination capability. The proposed enhanced layers (ELs), which are overlaid with the cellular communication data (the base layer) in both frequency and time domains, can be used for several specific purposes indispensable to multicell cooperation. It provides an efficient way of sharing the necessary information, e.g., channel state information, user data and other transmission parameters, between the collaborative BSs without the requirement of additional signaling or control channels. Overall network efficiency is substantially enhanced due to the reduction of radio resource overhead. Furthermore, cross BS synchronization and multimedia broadcast multicast service for next generation cellular networks can be simultaneously achieved by the proposed parallel orthogonal ELs. The transceiver design for the ML-OFDM system, particularly the modulation/demodulation of the ELs and EL-induced interference cancelation is presented. Overall system performance is further optimized by proposing a power distribution scheme with a set of practical constraints. The performance of the ML-OFDM system is analyzed and verified through numerical simulations. © 2012 Yang et al.
KSP 제안 키워드
Base layer, Base station coordination, Cellular Communication(GSM), Channel State Information(CSI), Control channel, Cooperative cellular networks, Distribution scheme, Flexible Transmission, Multicell cooperation, Multimedia Broadcast Multicast Service(MBMS), Network efficiency