arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1608.01113cs.NI
收藏

不完全流量热点定位下异构网络的系统级分析

System level analysis of heterogeneous networks under imperfect traffic hotspot localization

Aymen Jaziri, Ridha Nasri, Tijani Chahed

摘要:

我们研究,在本文中,不完美的小小区定位的影响,在蜂窝网络中的交通热点。为了推导出宏小区和小小区中的吞吐量分布,我们首先考虑用户位置的非均匀分布来执行系统的静态水平分析。其次,我们介绍了系统的动态,其特点是随机到达和离开的用户在有限的服务时间后,与服务率和无线电条件的分布配备从第一部分的工作。在处理系统的动态特性时,宏小区和小小区由多类处理器共享队列来建模。宏小区和小小区被假设为在相同的带宽中操作。因此,它们由于每个小区产生的相互干扰而耦合到另一个小区。我们得到几个性能指标,如平均流量吞吐量和增益,如果有的话,从部署小小区管理交通热点。我们的结果表明,在热点靠近宏BS(基站)的情况下,由于在宏和小小区用户处经历的高干扰,即使小小区的完美定位也不会产生改进的性能。然而,在热点位于离宏BS足够远的情况下,容许在小小区定位中执行错误(因为相关结果示出正增益),并且这在从拥塞的宏小区卸载业务方面仍然是有益的。最佳性能指标还取决于其他几个重要因素,如用户的到达强度,小区的容量和流量热点的大小。

英文摘要:

We study, in this paper, the impact of imperfect small cell positioning with respect to traffic hotspots in cellular networks. In order to derive the throughput distribution in macro and small cells, we firstly perform static level analysis of the system considering a non-uniform distribution of user locations. We secondly introduce the dynamics of the system, characterized by random arrivals and departures of users after a finite service duration, with the service rates and distribution of radio conditions outfitted from the first part of the work. When dealing with the dynamics of the system, macro and small cells are modeled by multi-class processor sharing queues. Macro and small cells are assumed to be operating in the same bandwidth. Consequently, they are coupled due to the mutual interferences generated by each cell to the other. We derive several performance metrics such as the mean flow throughput and the gain, if any, generated from deploying small cells to manage traffic hotspots. Our results show that in case the hotspot is near the macro BS (Base Station), even a perfect positioning of the small cell will not yield improved performance due to the high interference experienced at macro and small cell users. However, in case the hotspot is located far enough from the macro BS, performing errors in small cell positioning is tolerated (since related results show positive gains) and it is still beneficial in offloading traffic from the congested macrocell. The best performance metrics depend also on several other important factors such as the users' arrival intensity, the capacity of the cell and the size of the traffic hotspot.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑