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Inter-cell Interference Reduction Scheme for Uplink Transmission in NB-IoT Systems

机译:NB-IOT系统中的上行链路传输间的小区间干扰方案

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In this paper, we propose an inter-cell interference (ICI) minimization scheme for uplink transmission in the narrowband internet of things (NB-IoT) systems. We first establish the theoretical ICI problem formulation and propose its corresponding solution for the orthogonal multiple access (OMA) NB-IoT system. Based on the theoretical formulation, we design a cooperative radio resource scheduler that reduces the impact of ICI and allocates transmit powers to reduce the energy consumption to the scheduled users in a multi-cell scenario. We compare the performance of the proposed scheme with that of some benchmark OMA schedulers. The results show that the proposed technique significantly reduces the impact of ICI and hence is more suitable for the massive connectivity of the NB-IoT system. For example, the users operating under the proposed approach experience up to 50% reduced energy consumption when compared to the best channel quality indicator (CQI) scheme. Furthermore, 30% and 35% improvements in terms of achieved user's data rates are obtained as compared to the MaxMin and round-robin schemes, respectively.
机译:在本文中,我们提出了一种窄带互联网上的上行链路传输的小区间干扰(ICI)最小化方案(NB-IOT)系统。我们首先建立理论ICI问题配方,并提出了其对正交多址(OMA)NB-IOT系统的相应解决方案。基于理论配方,我们设计了一种协同无线电资源调度器,可以减少ICI的影响,并分配传输功率,以将能量消耗降低到多小区方案中的预定用户。我们将提出的方案的性能与一些基准OMA调度员进行比较。结果表明,该技术明显降低了ICI的影响,因此更适合于NB-IOT系统的大规模连接。例如,与最佳通道质量指标(CQI)方案相比,在所提出的方法下,在所提出的方法经验的经验高达50%的能耗。此外,与MAXMIN和ROWN-ROBIN计划相比,获得了实现用户数据速率的30%和35%的改进。

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