一种高能效无线传感器网络MAC协议

介质访问控制(MAC)协议是无线传感器网络研究领域的基础协议和支撑技术.因此,一种能量高效的MAC协议是提高整个无线传感器网络能量效率的基础.针对无线网络中能量储备有限的特点,在分析了现有无线传感器网络节能协议的基础上,提出了一种能量高效的MAC协议.通过动态调整占空比和消除边界节点等方式,提高了无线传感器网络的能量效率,延长了网络的生命周期.     

通信设备的能效评估

节能减排正越来越多地被一些国家或地区作为市场准入的门槛,例如,在欧盟,EuP指令已经生效并被纳入CE认证体系;在美国,Verizon等主流运营商也推出了自己的能效标准,09年1月1日起实施;在中国,政府和众多采购商都在强势推出产品节能的要求。然而,实际能效评价标准却非常欠缺,特别是如何评价通信系统设备的能效还是众多厂商的一个难题。本文以美国Verizon最新发布的能效标准为基准,对通信设备的能效评估相应的分析和介绍,旨在让同行更多地了解国外新兴的市场准入要求和能效评估方法。     

认知无人机辅助边缘通信的能效优化

针对无人机辅助边缘通信中的频谱资源紧缺与无人机能量受限问题,研究了最大化该场景下无人机认知通信的能量效率问题.首先,构建了无人机辅助边缘节点的认知通信网络模型;其次,提出了一种最大化无人机能效的算法,通过联合优化无人机的认知通信感知时间、飞行速度和通信距离阈值,显著提升了无人机认知通信过程中的能效;最后,通过仿真实验对...     

WSN能量跳变路由算法的研究

通过分析能量路由算法和最小跳数算法的局限性,提出了能量跳变算法。能量跳变算法充分考虑了无线传感器网络中影响路由性能的能量、跳数等因素,通过仿真实验表明该算法能有效地提高无线传感器网络的生存周期,更好地发挥了路由协议的性能,即通过简单的路由转发机制和对各节点较小的存储要求,就可以高效、可靠地传输有效数据,并且网络的可扩展性较好。     

Energy Efficiency Optimization of NOMA IoT Communication for 5G

Mobile Networks and Applications - With the rapid increase in the number of mobile users and the continuous emergence of new wireless multimedia services, 5G mobile communication technology that...     

基于协同感知的5G通信能量有效性优化算法

针对传统5G通信能量有效性差,造成传输效率低的问题,开展基于协同感知的5G通信能量有效性优化算法研究.通过基于协同感知的5G通信能量传输模式构建、计算5G通信能量感知时间,为5G通信能量有效性计算提出一种全新的优化算法.通过实验证明,算法优化后的5G通信能量与优化前的5G通信能量传输相比有效性更高,更符合5G通信技术的...     

On the Energy Efficiency of WSN Communications Operating Under Non-coherent M-FSK and M-QAM Modulations

To make Wireless Sensor Network (WSN) market growth a reality, we need to empower the network designers with a provision to optimally tailor the physical layer parameters. In this paper, we present a holistic analysis of energy related aspects of WSN communications operating under Rayleigh fading, using standardized WSN specifications. The rational expressions have been derived by taking into consideration the effects of packet size, repeated training sequences, transmission distance, path-loss, amplifier efficiency, bandwidth of the channel and active mode span for Non-coherent M-ary FSK (NC-MFSK) and M-QAM modulation schemes. The results of variation of total energy consumption along with various parameters like path-loss, amplifier efficiency, hop distance and packet size have been investigated. We found that for small transmission distances, M-QAM modulation performs better than NC-MFSK scheme, but as the distance increases the NC-MFSK outperforms the M-QAM in the terms of energy efficiency. Moreover, for communications operating with NC-MFSK modulation, the crossover point of better energy efficiency is achieved at lesser distance with increase in value of path-loss parameter. These results may enable the network designers to plan energy-efficient WSN communication architectures even in the presence of constrained environments.     

线状WSN中基于概率分流的负载均衡路由协议

针对线状无线传感器网络中节点能量消耗不均衡现象,本文提出基于概率分流的负载均衡路由协议,以一定规则建立多条路由路径,通过使负载较轻路径上的节点以一定概率分担负载较重路径上节点的数据传输任务,均衡网络中各个节点的负载。仿真结果表明,本协议能有效地改善各个节点能量消耗的均衡性,延长网络生存时间。     

Scaling of Output Load in Energy Efficient FIR Filter for Green Communication on Ultra-Scale FPGA

Wireless Personal Communications - FIR Filter always remains in linear phase with the help of symmetric coefficient. This feature makes it ideal for phase-sensitive applications like data...     

Proposed Energy Efficient Algorithm for Clustering and Routing in WSN

Wireless Personal Communications - Clustering in WSN recently become big challenge and attracts many researches. Clustering is a way of grouping sensor nodes into clusters with CH responsible to...     

基于无线传感器网络的应急通信系统

本文提出了一种基于无线传感器网络的应急通信系统的设计思路,可以有效的在恶劣条件下快速建立通信网络,为救援指挥及时提供所需的决策信息。阐述了系统的功能和组成,最后分析介绍了无线传感器网络的关键技术。     

基于多小区通信系统能效优化研究

随着移动信息产业的发展,无线通信设备剧增,通信系统能耗也随之增加。不断攀升的系统能耗问题制约了移动通信的发展,以基站资源块和发射功率的最优分配方案来提高无线通信系统能效(EE,Energy Efficiency,能量效率)已经成为当下研究的热点。文章首先构造了系统能效优化的函数,采用KKT、凸优化的算法,获得最大的系统能效。然后针对系统能效优化的系统模型进行分析,对不同网络场景下的能效优化研究现状进行综述。最后,对多小区通信系统能效优化的研究进行了总结与分析。     

An Energy Efficient Receiver-Initiated MAC Protocol for Low-Power WSN

This paper proposes RITMC, an asynchronous multichannel receiver-initiated MAC for low-power WSN. Through a comparison with already existing solutions, the RITMC tries to mitigate the message containment and the effect of Idle Listening through an initial recognition mechanism proposed by the A-MAC protocol, in addition to a multichannel mechanism and a more efficient diagnostic. In order to validate the proposed protocol, evaluations were made to the consumption of each node sensor, the network traffic for each link, the latency and the delivery rate of the network in a web application. The results show that the proposed RITMC minimizes energy consumption, besides improving communication and implementation when compared to the analyzed protocols.     

通信电源设备和空调的节能降耗

随着我国移动通信以及3G技术的快速发展，通信电源和空调设备的规模将越来越大，消耗的电能也是一个庞大的数目。通信电源作为电信运营商运行维护的“心脏”，在节能降耗方面具有很大的潜力。电费作为最后一项未被控制的成本，在节能方面更具有紧迫性。下面是笔者在对基站和中心局通信电源进行多年维护工作的基础上，总结的节能降耗措施。     

水泥生产节能减排监控系统通信技术

根据水泥生产节能减排的迫切需要构建了多媒体移动信息网络,对水泥生产中能源消耗和污染物排放的关键部位进行长期连续信息采集,用对称高速数字用户线路（SHDSL）、短距离无线通信、光纤等方式进行企业内部数据传输,应用第三代移动通信技术（3G）建立数据远程高速传输通道,以数字、文字、图像、视频等多种形式的媒体承载信息,将网络覆盖达到全球范围,使企业技术和管理人员能够用计算机、掌上电脑和移动电话等各种终端装置随时、随地、随身获取所需要的最新信息,根据这些信息调控生产工艺。     

Adaptive Cross-Layer Routing Protocol for Optimizing Energy Harvesting Time in WSN

Wireless Personal Communications - Trade-off between energy conservation and efficiency is one of the most important issues in designing Wireless Sensor Network (WSN) based applications. Network...     

Energy Efficient Reliable Multi-path Data Transmission in WSN for Healthcare Application

In healthcare applications of WSN, the data loss due to congestion may cause death alarm for a patient in critical condition. Therefore, an efficient congestion avoidance or otherwise an efficient congestion control mechanism is required. In this paper, we present an energy efficient reliable multi-path data transmission protocol for reliable data transport over WSN for the health care application. The emergency data and sensitive data packets are transmitted through an alternate path having minimum correlation with transmission interference during congestion. The proposed protocol attempts to avoid congestion by computing the probability of congestion at the intermediate nodes and transmission rate at the intermediate node is adjusted. The buffer of each node is partitioned to support fair and efficient data delivery. The reliability of the proposed protocol is achieved through hop-by-hop loss recovery and acknowledgement. The performance of the proposed protocol is evaluated through extensive simulations. The simulation results reveal that it outperforms the existing congestion control protocols for healthcare application in terms of energy efficiency, reliability and end-to-end delivery ratio.     

An Improvement Energy Consumption Policy Using Communication Reduction in Wireless Body Sensor Network

Dedicated short-range communications (DSRC) is an important wireless technology for current and future automotive safety and mitigation of traffic jams. In this work, we have designed a Coplanar waveguide microstrip patch antenna with linear, upper and bottom and side slots for application in DSRC. The patch antenna was designed using glass epoxy substrate (FR4). Various parametric analyses such as the current distribution, reflection coefficient, radiation pattern on E- and H-plane as well as the realized gain (dB) were performed. The results were obtained by simulation using high-frequency structure simulator tool. The proposed antenna covers a frequency band of 5.8–5.9 GHz which is highly dedicated to the DSRC wireless communication technology for enhancement of safety of the automotive transport system. The designed antenna shows a good return loss of ??19 dB at 5.9 GHz.The designed antenna shows a promising gain, return loss and radiation pattern for use in DSRC for automotive transport systems.

     

Energy Efficiency Improvements in Heterogeneous Network Through Traffic Load Balancing and Sleep Mode Mechanisms

Heterogeneous network (HetNet) is one of the most promising approaches of IMT Advanced, which not only offers higher capacity and data rate, but also network Energy Efficiency (EE). HetNet is an advanced network that promotes complex cooperation between multiple tiers or sizes of base stations, i.e. macro, micro, pico, and femto base stations towards the above benefits. In this paper, a theoretical model for evaluating the EE of HetNet is proposed. Then, a sleep mode mechanism on picocells is proposed to reduce the total energy consumption which subsequently improves the EE. Simulation results show that EE can be increased by balancing the traffic load between different types of base stations. In fact, the improvement very much depends on the percentage of traffic that is offloaded to picocells. At low to medium traffic load conditions, significant improvements in EE can be observed through the proposed sleep mechanism. It is observed that by combining the sleep mode feature of picocells and load balancing between the different types of base stations in HetNet, further EE improvements up to 68 % for low traffic load and up to 33 % for medium traffic load can be achieved.     

Energy efficient compression sensing-based clustering framework for IoT-based heterogeneous WSN

Telecommunication Systems - Compressive Sensing (CS) has proved to be a promising approach for the Internet of things (IoT) due to the fact that CS can abate the magnitude of raw data which is to...