An Ant-based Multipath Routing Algorithm for QoS Aware Mobile Ad-hoc Networks

In the wireless ad-hoc network management, Quality of Service (QoS) is an important issue. Along with the QoS ensuring, another desirable property is the network reliability. In data communications, multi-path routing strategy can cope with the problem of traffic overloads while balancing the network resource consumption. In this paper, we propose a new multipath routing algorithm for QoS-sensitive multimedia services. Based on the ant colony optimization technique, the proposed algorithm can establish effective multi-paths to enhance the network reliability. According to the load balancing strategy, data packets are adaptively distributed through the established paths while maintaining an acceptable level of QoS requirement. The most important feature of the proposed approach is its adaptability to current traffic conditions. Simulation results indicate the superior performance of the proposed algorithm, while other schemes cannot offer such an attractive performance balance.     

基于QoS的Ad Hoc路由协议综述

Ad Hoc网络是由一组带有无线收发装置的移动终端组成的一个多跳的临时性自治系统。随着人们对通信业务要求的不断提高，对带宽、时延、误码率等性能参数提出了不同程度的保障要求，因此要求Ad Hoc网络能够为某些业务提供服务质量（QoS）保障。但由于Ad Hoc网络无线链路的时变特性、网络拓扑结构的动态变化、移动终端设备电池容量受限等特点，使其相对于固定无线网络及有线网络提供有保证且稳定的QoS保障要困难得多，非常具有挑战性。本文对目前几种基于带宽和时延约束的QoS路由协议进行了介绍。     

QoS Routing in Wireless Mesh Networks

An H-hop interference model is proposed, where the transmission is successfully received if no other nodes that are within H hops from the receiver are transmitting on the same channel simultaneously. Based on this model. the interference-free property in the Time division multiple access Wireless mesh networks is analyzed. A heuristic algorithm with max-rain time slots reservation strategy is developed to get the maximum bandwidth of a given path. And it is used in the bandwidth guaranteed routing protocol to find a path for a connection with bidirectional bandwidth requirement. Extensive simulations show that our routing protocol decreases the blocking ratios significantly compared with the shortest path routing.     

QoS Routing Algorithm with Multi-Dimensions for Overlay Networks

Overlay networks have emerged as a useful approach to providing a general framework for new applications and services that are to be implemented without significantly changing the IP-layer network infrastructure. Overlay routing has been used as an alternative to the default best effort Internet routing for the absence of end-to-end Quality of Service （QoS）. While the former has recently been in- vestigated, the conflict of QoS restraints and resource optimization remains unsolved. Re- cent studies have shown that overlay paths can give better latency, loss rate and TCP throu- ghput. In this paper, a multi-dimensional QoS objective model based on the analysis of mul- tiple QoS constraints has been presented, and a routing algorithm to optimise the overlay re- source of its nodes and links is then proposed. In fact, the algorithm obtained multiple QoS values using probability theory to achieve the ro- uting according to the multi-dimensional QoS objective vector of the QoS objective model. Simulation results reveals that the algorithm works better than other existing algorithms in balancing the network resources, and applications with stringent QoS requirements could be run.     

非确定环境下的QoS网络路由问题

该文探讨非确定环境下的QoS路由问题,包括最大可能性路径,最优路径分解以及最优分解路径问题。本文分析了当链路延迟为连续变量时最大可能性路径问题的求解,给出了链路延迟为正态分布时的相关算法。对于最优路径分解以及最优分解路径问题,本文给出了两种QoS分解方式:方式Ⅰ优化路径各链路满足QoS需求的可能性的乘积,方式Ⅱ优化路径各链路满足QoS需求的可能性的最小值。该文对其分别进行分析并给出具体算法。     

无线多媒体传感器网络QoS区分服务路由机制

 无线多媒体传感器网络中多种类型数据并存,服务质量需求各异,因此如何提供服务质量保障机制是无线多媒体传感器网络研究领域的重点问题.本文提出了一种基于角度的区分服务路由算法,在该算法中,网络节点将各自的邻居节点按其偏转角度进行分类,为不同需求的数据流选择不同的转发区域,并结合邻居节点的地理位置、单跳通信负载、剩余能量等信息完成各数据流的区分路由.仿真结果表明,该算法在多媒体数据流传输的延迟、抖动、丢包率以及能耗等性能上均要优于已有算法.     

移动Ad hoc网络的QoS路由实现机制

随着实时多媒体业务向移动Adhoc网络的引入,如何为移动Adhoc网络提供服务质量保证成为当前研究的热点。本文介绍了为移动Adhoc网络提供QoS路由的三种实现机制:MAC层的TDMA资源管理、普通的QoS测量、CDMA的不同传输之间的冲突避免。     

无线Ad Hoc网络中的QoS路由协议

无线Ad Hoc网络的应用环境以及与Internet的互连都要求其必须提供一定的服务质量(QoS)保证,QoS路由技术是在无线Ad Hoc网络中实现QoS的重要方法。本文对近年来国内外在无线Ad Hoc网络中的QoS路由技术方面取得的研究成果进行了全面的概括总结和分类,对资源预留路由、多径路由和跨层优化路由3类QoS路由协议进行比较分析,并且提出了QoS路由技术亟待解决的问题和今后的发展方向。     

QoS Aware Trust Based Routing Algorithm for Wireless Sensor Networks

Wireless Personal Communications - In Wireless Sensor Network (WSN), the lifetime optimization based on minimal energy consumption and security are the crucial issues for the effective design of...     

浅析LEO卫星网络中的QoS路由问题

LEO卫星网络能够提供全球覆盖,为任何地点的用户提供适时应用服务。然而由于LEO的高速运动,LEO卫星网络的网络拓扑一直处于动态变化的过程中。文中首先分析了在这种动态变化的网络环境中QoS路由面临的新问题,接着提出了解决这些问题的几点考虑。     

无线Mesh网络QoS路由度量研究

无线Mesh网络的研究非常活跃,针对网络路由选择已经提出了一些路由选择度量。本文对各种路由度量及优缺点进行了详细的分析,并在此基础上,给出了一种新的路由度量方式并展望无线Mesh网络QoS路由度量选择的发展方向。     

移动Ad Hoc网络中的QoS路由研究

移动自组网是一种无基础设施的无线多跳新型网络。如何在移动自组网中提供不同的QoS保证是其面临的一个重要问题，而QoS路由则是其中的核心技术和热点问题。目前研究人员已经提出了几种QoS路由协议．但都是通过在具体的路由协议中增加QoS参数约束路由来保证QoS，仍存在一些问题，需要进一步研究和改进。     

移动自组织网QoS路由协议研究

Qo S路由协议在移动自组织网的 Qo S保证中有十分重要的作用。本文首先从自组网特点出发 ,分析 Qo S路由设计的基本要求 ,然后从路由建立、链路状态信息的维护、路由控制开销和拓扑变化对协议的影响等方面详细介绍了 4种自组网 Qo S路由协议 ,最后提出了今后的研究方向     

An Energy-Aware Hybrid Approach for Wireless Sensor Networks Using Re-clustering-Based Multi-hop Routing

In recent years, cloud computing provides a spectacular platform for numerous users with persistent and alternative varying requirements. In the cloud environment, security and service availability are the two most significant factors during the data encryption process. For providing optimal service availability, it is necessary to establish a load balancing technique that is capable of balancing the request from diverse nodes present in the cloud. This paper aims in establishing a dynamic load balancing technique using the APMG approach. Here in this paper, we integrated adaptive neuro-fuzzy interference system-polynomial neural network as well as memory-based grey wolf optimization algorithm for optimal load balancing. The memory-based grey wolf optimization algorithm is employed to enhance the precision of ANFIS-PNN and to maximize the locations of the membership functions respectively. Also, two significant factors namely the turnaround time and CPU utilization involved in optimal load balancing scheme are evaluated. Finally, the performance evaluation of the proposed MG-ANFIS based dynamic load balancing approach is compared with various other load balancing approaches to determine the system performances.

     

BeamStar: An Edge-Based Approach to Routing in Wireless Sensor Networks

Current expectations on sensor node in terms of size, cost, and energy efficiency have led to a severely limited design space on hardware and software. In this paper, we explore capabilities at the network edge for sensor networks, aiming to reduce the hardware and software complexity of a sensor node without sacrificing network performance. We present a novel edge-based routing protocol, nicknamed BeamStar, for wireless sensor networks. Under BeamStar, the base station exploits some nice properties associated with directional antenna and power control at the base station. We devise a simple protocol so that each sensor node can determine its location information passively with minimum control overhead. We also show how to design a robust routing protocol based on the location information at each sensor node. Under the proposed protocol, sensor nodes are relieved of the activities (or burdens) that are associated with control and routing, thus enabling much simpler hardware and software implementation at sensor nodes. Simulation results demonstrate that BeamStar achieves high reliability at comparable energy consumptions as compared with prior work. It is a viable approach to pursue size and cost reduction for future sensor node design.     

路由选择的智能方法

本文利用模糊理论来对通信网中的路由进行动态选择。文中首先讨论了路由选择所要考虑的一些因素,然后利用模糊综合评判理论评估出路由选择的量化综合指标,再通过模糊图中的最强路法选择出两点间的最佳路由。最后把该法同已有方法进行仿真比较,发现该法比较的方法能较大地提高接通率,且性能未受损害。     

Route Stability Based QoS Routing in Mobile Ad Hoc Networks

To provide high quality communications service among mobile wireless devices is basically a challenging task in wireless ad hoc networks. In this paper, we propose a Route Stability based QoS Routing (RSQR) protocol in Mobile Ad Hoc Networks (MANETs) which is an extension of QoS routing with throughput and delay constraints. Ensuring a data path to be valid for sufficiently longer period of time is a very difficult problem in MANET due to its highly dynamic nature. We propose a simple model for computing link stability and route stability based on received signal strengths. By including some extra fields in route request/reply packets, the route stability information can be utilized to select a route with higher stability among all the feasible routes between a given source destination pair. Further, inclusion of a signal strength based admission control enhances the performance of the routing. Results of our experiments show performance improvements in terms of packet delivery ratio, control overhead and average end-to-end delay in comparison with a QoS routing protocol proposed by Q. Xue and A. Ganz.     

移动自组网模糊逻辑QoS动态源路由算法

该文提出了一种新的移动Ad hoc网络QoS路由算法：模糊逻辑QoS动态源路由算法。算法从模糊理论的思想出发,将业务的多个QoS参数进行综合评判产生一类以语言变量描述的请求,在修改动态源路由协议为多径路由算法的基础之上,对比各条路径综合模糊路由状态,选择出最适合业务请求的路径。仿真显示算法在支持QoS的同时对移动Ad hoc网络因拓扑动态变化而引起的信息不精确性有很好的适应度。