Downlink Radio Resource Allocation for Multi-Cell OFDMA System
Downlink Radio Resource Allocation for Multi-Cell OFDMA System
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DOI：
10.1109/twc.2006.256968
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发表时间：
2006-12
影响因子：
10.4
通讯作者：
Guoqing Li;Hui Liu
中科院分区：
文献类型：
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作者：
Guoqing Li;Hui Liu
本文提出了一种用于OFDMA系统的无线资源控制（RRC）方案，该方案在无线网络控制器（RNC）和基站（BSs）上实现动态资源分配。该方案是半分布式的，即RRC决策在RNC和BSs之间被分割。RNC在超帧级决定哪个基站使用哪个信道，然后基站在帧级决定哪个用户被分配到哪个信道。提出了RNC和BSs的两个优化问题，并开发了具有抗干扰和通信量/信道自适应功能的高效算法。数值分析显示了在扇区干扰抑制和动态干扰避免之间的权衡。结果表明，在合理的信令开销下，该协议和相关算法对实时和非实时业务都具有良好的性能，即使在快速衰落下也是如此
This paper presents a radio resource control (RRC) scheme for OFDMA systems where dynamic resource allocation is realized at both a radio network controller (RNC) and base stations (BSs). The scheme is semi-distributed in the sense that the RRC decision is split between RNC and BSs. RNC makes decision on which channel is used by which BS at super-frame level and BSs then make decision on which user is assigned to which channel at frame-level. Two optimization problems for RNC and BSs are formulated and computationally efficient algorithms that perform the function of interference avoidance and traffic/channel adaptation are developed. Numerical analysis is performed under several cell configurations to show tradeoffs between sector interference suppression and dynamic interference avoidance. The results indicate that with reasonable signaling overhead, the protocol and the associated algorithms yield excellent performance for both real-time and non real-time services, even under fast fading