基于软件无线电的绿色集约移动通信基站技术

现阶段各国移动通信网络能耗主要来自于无线通信系统.传统无线通信系统的物理结构相对于通信运营商在网络整体拥有成本(TCO)中上升曲线已放缓.基于软件无线电技术,提出一种可以有效提高通信系统能效、更为绿色环保的基站体系结构,能够更好地实现无线通信系统的绿色演进.     

基于认知无线电的无线通信研究现状

归纳了从软件无线电到认知无线电功能的演进。认知无线电是在软件无线电的基础上提出的智能化的无线通信技术,它着力解决频谱资源的有效利用问题;认知无线电概念的提出将对现行的频谱管理体制提出挑战,并给无线通信带来新的发展空间。软件无线电在其系统硬件无需变更的情况下,可以在不同的时候根据需要通过软件加载来完成不同的功能。认知无线电可以感知周围电磁环境,通过无线电知识描述语言（RKRL）与通信网络进行智能交流,并实时调整传输参数,以达到无论何时何地都能达到通信系统的高可靠性和频谱利用的高效性。文中在此基础上探讨了认知无线电技术未来发展值得关注的热点问题。     

软件无线电技术在通信系统中的应用

无线通信系统往往需要通过不同的制式,通过在不同的频段进行不同的工作从而实现,因此它无法具有互通和兼容性。软件无线电技术则通过构建一个开放性的,标准化的,规模块的通用硬件平台,通过软件来实现各种功能,从而构建了新一代的无线通信系统,实现了通信系统的历史变革。本文首先对软件无线电技术进行了概述,在此基础上对软件无线电技术在通信系统中的应用进行了探讨,给出了一些自己的看法和建议。     

软件无线电概述

软件无线电是最近几年提出的一种实现无线通信新的体系结构,其基本概念是把硬件作为无线通信的基本平台,而把尽可能多的无线及个人通信功能用软件实现。 作为一种新的无线通信概念和体制,软件无线电在国内外受到广泛重视。本文将介绍软件无线电的发展简史、研究机关、应用范围、技术难点。     

软件无线电技术在无线通信系统中的应用

无线通信系统往往采用不同的制式、工作在不同的频段，因此无法互通和兼容。软件无线电技术通过构造一个具有开放性、标准化、模块化的通用硬件平台，用软件来完成各种功能，可用于研制具有高度灵活性和开放性的新一代无线通信系统。介绍了软件无线电的基本结构和关键技术．然后分别叙述了软件无线电在cdmax 1x基站和3G中的应用，最后指出了软件无线电技术在3G中的重要性。     

软件无线电所面临的技术挑战

软件无线电已经成为目前无线应用领域中一个非常重要的研究课题。它采用的用软件实现多波段、多模式无线通信系统的技术将成为解决全球化通信的重要技术和方法之一。当然要采用软件无线电技术去实现所有人们企望的复杂通信系统还面临许多挑战,其中包括技术层面和政策层面的一系列问题。该文侧重分析在采用软件无线电技术解决通信系统中的一些技术问题时所面临的困难,同时探讨一些相关的解决方案和方法。     

软件无线电发展现状

1 前言软件无线电是实现无线通信新体系结构的一种技术，在经过近几年的发展之后，其重要性和可行性正逐步被越来越多的人所认识和接受。软件无线电技术的重要价值体现在：硬件只是作为无线通信的基本平台，而许多的通信功能则是通过软件来实现的，这就打破了长期以来设备的通信功能实现仅仅依赖于硬件的发展格局。所以有人称，软件无线电技术的出现是通信领域继固定到移动，模拟到数字之后的第三次革命。本文主要介绍全球软件无线电技术研究动态、对实现软件无线电台至关重要的器件技术的发展以及软件无线电台商用前景。2 全球软件无线电…     

软件无线电技术

软件无线电就是利用软件来实现无线通信系统中的各种功能的一种通信技术，因其有诸多优点，近年来获得了较大的发展。本文介绍了用于移动通信的软件无线电技术的概念，体系结构和关键技术。     

移动通信系统中的软件无线电技术

软件无线电是在通用的、开放的硬件平台上采用软件技术来实现无线通信系统的各种功能的通信技术。本文介绍了软件无线电的基本概念、主要特点，分析了实现软件无线电的关键技术及其在第三代移动通信系统中的应用前景。     

软件无线电技术及其在蜂窝移动通信系统中的应用研究

软件无线电技术是近年来出现的新的无线通信设计思想与框架。是无线通信领域的一项突破性关键技术。本文详细了软件无线电的概念、系统结构、基本特征,在典型软件无线电体系基础上,描述了应用该设想的蜂窝区基站功能。同时结合关键技术,展望了软件无线电的发展趋势。     

绿色基站解决方案与实现技术

基站功耗是无线通信系统功耗的主体。基站绿色节能解决方案是无线网络绿色节能的首要目标。基于绿色基站解决方案涉及基站架构、基站形态、绿色基站节能技术及绿色站点应用等多个方面,文章提出绿色基站解决方案,探求基站节能降耗的有效途径。     

Green Base Station Solutions and Technology

Base station power consumption is the biggest power issue concerning wireless networks. Saving power in base stations is therefore the primary focus in green wireless network development. This paper discusses green base stations in terms of system architecture, base station form, power saving technologies, and green technology applications. It explores effective ways of reducing power consumption in base stations.     

Energy efficient dynamic optimal control of LTE base stations: solution and trade-off

The demand to reduce energy consumption in wireless networks has become popular recently. In this paper, aimed at the problem that how to reduce energy consumption through on-off control in wireless networks without losing system performance significantly, we present our solution both in a single base station and the multi-base station scenario. Under the assumption that the network arrival and departure process are Markov, we first model and solve the problem of optimal on-off control in single base station scenario using dynamic integer programming (DIP) method, then we extend the optimal solution to multi-base station scenario and raise an effective heuristic method in two layer networks, the trade-off between QoS level and energy consumption has been given according to our analysis and simulation. Numerical results are provided to demonstrate that the proposed method offer significant gain in terms of the energy efficiency.     

Joint power allocation and relay selection strategy for 5G network: a step towards green communication

Green communication has emerged as the most important concept for the next generation networks. Along with improved data rate and capacity, the upcoming 5G networks aim at improving energy efficiency without compromising on the user experience. In this paper, we have used amplify and forward relays in the heterogeneous network topology consisting of low power and high power nodes. A three layered system model for power optimization is discussed using a relay selection strategy for power optimization with the aim to improve energy efficiency of the network. Further, we have used Hidden Markov Model for training and maintaining of base station, relay and SCA with the aim of probabilistic power allocation to client nodes in order to solve the power optimization problem. We have also used adaptive modulation schemes for lowering the power consumption of the network to meet our goal of green communication for the next generation network.     

一种改进的基于时间竞争成簇的路由算法

为平衡无线传感器网络中的簇头负载并进一步降低多跳传输能耗,文中提出了一种改进的基于时间竞争成簇的路由算法。该算法通过限制近基站节点成簇入簇,以防止近基站节点成簇入簇的节能收益无法补偿成簇入簇能耗;利用基站广播公共信息和基于时间机制成簇,以减少节点基本信息交换能耗;通过候选簇头中继来平衡簇头负载。候选簇头的评价函数综合考虑了剩余能量和最优跳数的理想路径,以期在保持中继负载平衡的基础上尽量降低多跳能耗。仿真结果显示,该算法较LEACH和DEBUC算法延长了以30%节点死亡为网络失效的网络生存周期,表明该算法在降低节点能耗和平衡负载方面是有效的。     

基于多元线性回归算法的5G基站能耗模型

5G基站能耗高,对运营商的网络运营成本带来较大的压力。优化了5G基站能耗测试方法和业务加载方法,获取了大量现网5G基站能耗和无线利用率关系的实测基础数据。基于多元线性回归算法,构建了不同场景下的5G基站能耗模型,能耗模型拟合优度达到0.99以上。     

Analytical framework for power saving evaluation in two-tier heterogeneous mobile networks

Reducing the power consumption of base stations in mobile networks is an important issue. We investigate the power saving evaluation in two-tier heterogeneous mobile networks which consist of femtocells overlaid by macrocells. In the heterogeneous mobile networks, base stations without traffic load are allowed to enter the sleep mode to save power. The power saving probability that a base station enters the sleep mode and the average total power consumption of this network are complex joint-effects of various factors. Successful modelling of these complex joint-effects is critical to mobile network operators when they pursue the design of green mobile networks. In this paper we propose an analytical framework to facilitate systematic analysis. Based on the proposed analytical framework, we investigate the power saving probabilities and the average total power consumption in terms of several parameters, including the new traffic arrival rate per user, the maximum transmission power of a femtocell, the number of femtocells within a macrocell, and the number of users in the network. Numerical results show that the proposed analytical framework provides a useful and efficient method to facilitate systematic analysis and design of green mobile networks. Simulation results validate the accuracy of the proposed analytical framework.     

载频智能节电技术在TD-LTE通信网络中的应用

在移动通信网络的能耗中,基站的能耗超过了整个通信系统能耗的70%,为了能够实现移动运营商的节能目标,对于无线基站节能减耗技术的研究将是一个非常重要的方面。首先从移动通信基站节能的现状出发,分析了TD-LTE系统中基站主设备智能节电系统设计的必要性。在分析无线网络话务时间规律的基础上,针对移动通信网络话务潮汐的特点,根据TD-LTE系统基站主设备的运行原理,分析了载频关断技术在TD-LTE基站系统中实现节能降耗的方法,提出了载频智能关断技术在TD-LTE基站系统中设计原则和技术方案,并且通过测试验证得出了载频智能关断技术在TD-LTE网络中运行的可行性。最后,对此项技术规模性应用所取得的节能效果进行了总结并提出应用建议。     

A Green Clustering Protocol for Mobile Sensor Network Using Particle Swarm Optimization

Energy consumption of sensor nodes is one of the crucial issues in prolonging the lifetime of wireless sensor networks. One of the methods that can improve the utilization of sensor nodes batteries is the clustering method. In this paper, we propose a green clustering protocol for mobile sensor networks using particle swarm optimization (PSO) algorithm. We define a new fitness function that can optimize the energy consumption of the whole network and minimize the relative distance between cluster heads and their respective member nodes. We also take into account the mobility factor when defining the cluster membership, so that the sensor nodes can join the cluster that has the similar mobility pattern. The performance of the proposed protocol is compared with well-known clustering protocols developed for wireless sensor networks such as LEACH (low-energy adaptive clustering hierarchy) and protocols designed for sensor networks with mobile nodes called CM-IR (clustering mobility-invalid round). In addition, we also modify the improved version of LEACH called MLEACH-C, so that it is applicable to the mobile sensor nodes environment. Simulation results demonstrate that the proposed protocol using PSO algorithm can improve the energy consumption of the network, achieve better network lifetime, and increase the data delivered at the base station.     

LTE绿色节能解决方案

文章分析无线通信中网络和基站绿色节能技术的发展,阐述中兴通讯在LTE无线网络中,采用的绿色产品设计,以及设备和网络级的节能解决方案。重点描述通过功放电压调节、OFDM符号关断及智能小区关断等具体基站节能技术来达到降低能耗,节省运营商OPEX的目的。