基于小区间干扰抑制的AFDD双工系统动态频率分配方案
首发时间:2009-09-18
摘要:未来的移动通信系统要求其无线资源分配策略能抑制小区间的干扰,适应上下行业务分布不对称的特性,提供较高的频谱利用率。自适应动态非对称频分双工技术——AFDD能够满足这种资源分配的需求。根据AFDD的基本思想,提出了一种基于小区间干扰抑制的动态频率分配方案。该方案以抑制小区间干扰为目标,根据小区需求以“重载小区优先”为原则,在上下行分别进行小区间频率资源的分配,能够根据小区业务变化情况动态调整上下行的资源分配,适应系统的上下行非对称特性,实现较高的频谱利用率。
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A Dynamic Frequency Allocation Scheme Based on Inter-cell Interference Mitigation for AFDD Systems
Abstract:Future mobile telecommunication systems require wireless resource to be deployed reasonably to mitigate inter-cell interference, adapt to the asymmetric characteristics of uplink and downlink transmission, and provide high frequency utilization efficiency. Adaptive dynamic asymmetric frequency division duplex scheme – AFDD can fulfill this requirement. A dynamic frequency allocation scheme based on AFDD which can mitigate inter-cell interference is proposed. With the principle of “Heavy Load Cell First”, the scheme allocates the frequency resources to all cells according to their requirement and dynamically adjusts the resources according to the changes in demand. The scheme can achieve the aim of mitigating inter-cell interference, and dynamically adjust uplink and downlink frequency allocation of each cell according to their requirement. It’s proved that the scheme can adapt to the asymmetry of uplink and downlink of the systems, as well as provide high frequency utilization efficiency.
Keywords: AFDD adaptive duplex frequency allocation interference mitigation
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