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Energy Efficiency Analysis of Idealized Coordinated Multi-Point Communication System

机译:理想化协调多点通信系统的能效分析

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摘要

Coordinated multi-point (CoMP) architecture has proved to be very effective for improving the user fairness and spectral efficiency of cellular communication system, however, its energy efficiency remains to be evaluated. In this paper, CoMP system is idealized as a distributed antenna system by assuming perfect backhauling and cooperative processing. This simplified model allows us to express the capacity of the idealized CoMP system with a simple and accurate closed-form approximation. In addition, a framework for the energy efficiency analysis of CoMP system is introduced, which includes a power consumption model and an energy efficiency metric, i.e. bit-per-joule capacity. This framework along with our closed-form approximation are utilized for assessing both the channel and bit-per-joule capacities of the idealized CoMP system. Results indicate that multi-base-station cooperation can be energy efficient for cell-edge communication and that the backhauling and cooperative processing power should be kept low. Overall, it has been shown that the potential of improvement of CoMP in terms of bit-per-joule capacity is not as high as in terms of channel capacity due to associated energy cost for cooperative processing and backhauling.
机译:事实证明,协作多点(CoMP)体系结构对于改善蜂窝通信系统的用户公平性和频谱效率非常有效,但是其能量效率仍有待评估。本文通过假设完美的回程和协同处理,将CoMP系统理想化为分布式天线系统。这种简化的模型使我们能够通过简单而精确的闭合形式近似值来表达理想化CoMP系统的容量。另外,介绍了用于CoMP系统的能量效率分析的框架,该框架包括功耗模型和能量效率度量,即每焦耳容量。该框架与我们的闭式近似一起用于评估理想CoMP系统的信道容量和每焦耳容量。结果表明,多基站协作对于小区边缘通信可以是高能效的,并且回程和协作处理能力应保持较低。总体而言,由于协作处理和回程的相关能源成本,已经证明,在每焦耳比特容量方面改进CoMP的潜力不如在信道容量方面高。

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