采用发送功率加权分配策略的群小区架构容量与覆盖分析

随着用户对高速率、高质量无线通信业务需求的不断增长,以及对多入多出、空时码、分布式天线等多天线信号处理技术的深入研究,探讨面向未来移动通信系统的小区构建方法成为必然的需求.该文介绍了一种广义分布式小区架构--群小区,群小区架构适应先进的物理层技术,能够充分利用多天线技术带来的优势,并且可以解决未来移动通信系统由于载频提高导致小区变小带来的频繁切换问题.该文介绍了群小区架构的概念、构建方法以及基于群小区架构的滑动切换策略,重点分析了群小区架构采用下行发送功率加权分配策略下的容量性能和覆盖性能.理论分析和仿真结果证明,与当前的小区架构相比较,群小区架构可以有效地提高系统容量,扩大覆盖范围.

Capacity and Coverage Analyses for Group Cell with Weighted Transmission Power Allocation Scheme

With the increasing demand for high data rate and high quality of mobile telecommunication services, and the deeply research on multi-antenna techniques, the cellular concept and network topology for future mobile communication systems are necessarily researched. This paper introduces the generalized distributed cellular architecture-group cell, which is suitable for advanced physical techniques and solves the problem of smaller cells caused by higher frequency carrier. The concept and the structure of the group cell are described and slide handover strategy based on the group cell is introduced as well. The system performance of capacity and coverage with downlink weighted transmission power allocation scheme are focused both in theory and numerical simulation. Compared to traditional cellular structure, the simulation results verify that group cell architecture can improve the system capacity and enlarge the coverage area.