• Title, Summary, Keyword: Wireless Mesh Network

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On the Formulation and Optimal Solution of the Rate Control Problem in Wireless Mesh Networks

  • Le, Cong Loi;Hwang, Won-Joo
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.32 no.5B
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    • pp.295-303
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    • 2007
  • An algorithm is proposed to seek a local optimal solution of the network utility maximization problem in a wireless mesh network, where the architecture being considered is an infrastructure/backbone wireless mesh network. The objective is to achieve proportional fairness amongst the end-to-end flows in wireless mesh networks. In order to establish the communication constraints of the flow rates in the network utility maximization problem, we have presented necessary and sufficient conditions for the achievability of the flow rates. Since wireless mesh networks are generally considered as a type of ad hoc networks, similarly as in wireless multi-hop network, the network utility maximization problem in wireless mesh network is a nonlinear nonconvex programming problem. Besides, the gateway/bridge functionalities in mesh routers enable the integration of wireless mesh networks with various existing wireless networks. Thus, the rate optimization problem in wireless mesh networks is more complex than in wireless multi-hop networks.

Mobility Management in Multi-Radio Multi-Channel Wireless Mesh Networks

  • Que, Ma. Victoria;Hwang, Won-Joo
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.33 no.3A
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    • pp.304-310
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    • 2008
  • In a wireless mesh network, there are two types of nodes: mesh routers and mesh clients. These two contradistinct network entities will be characterized and modeled depending on their role in the network. Mesh routers are essentially not mobile unlike the mesh clients. The differences on these nodes should be noted in any protocol design. In this paper, we present a mobility management for wireless mesh network (WMN). This mobility management handles movement of wireless mesh clients as it leaves from a coverage area of a wireless mesh router to another. We consider signaling overhead and mobility as performance metrics.

ETI(Expected Transmission Interference) for Interference-aware (노드 간섭을 고려한 ETI 알고리즘)

  • Byeon, So-Young;Roh, II-Soon
    • The Journal of The Institute of Internet, Broadcasting and Communication
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    • v.9 no.6
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    • pp.89-94
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    • 2009
  • In wireless mesh network, nodes are communicates as like as Ad-Hoc. Nodes of Wireless Mesh Network must have a good QoS and a algorithm for good path. ETX, ETT and WCETT are proposed Wireless Mesh Network routing methods. But these have Interference problem. This paper propose ETI(Expected Transmission Interference) based on ETT for good path selection. This paper show the algorithm and improved performance in simulation than other algorithms.

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Multi-interface Wireless Mesh Network Testbed using Wireless Distribution System (무선 분산 시스템을 이용한 멀티 인터페이스 무선 메쉬 네트워크 테스트베드)

  • Yoon, Mi-Kyung;Yang, Seung-Chur;Kim, Jong-Deok
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.13 no.6
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    • pp.1077-1082
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    • 2009
  • Wireless Mesh Network(WMN) is wireless backbone networks technique which has ease of network configuration and cost of advantage. Recently, WNM released a new product, but most of existing research and technology analysis the performance through the simulation. This paper build the wireless mesh network testbed for actual situation. Testbed supports multi-channel multi-interface using bridge, the Wireless Distribution System and dynamic location-based routing protocol. This routing protocol strongly design against wireless interference using metric for link channel change and real distance. Then, the address of mesh clients assigned by the centralized address management server. Mesh clients is designed and implemented to manage network through Simple Network Management Protocol.

A Study on Design of Wireless Networks using Mesh Networks (메쉬 네트워크를 활용한 무선 네트워크망 설계에 관한 연구)

  • Choi, Yong-Seok;Rho, Jung-Kyu
    • Journal of Satellite, Information and Communications
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    • v.9 no.1
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    • pp.45-50
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    • 2014
  • In this paper, broadband wireless smart city network coverage was implemented targeting a city (Wonju) using the wireless mesh network. Through this, we could provide wireless network that can easily add network and be repaired easily and have high economic effect. In order to implement broadband wireless smart city network coverage, wireless mesh network has been designed through pre-survey of the region and appropriate selecting of equipment. In addition, the designed network is examined, evaluated and compared with existing network though simulation. The aim of this paper is to prove high cost saving effect of wireless mesh network and its superior performance and to suggest future oriented integrated network of Green IT though research.

Performance Improvement of Wireless Mesh Networks using TCP Congestion Control Algorithm (TCP 혼잡제어 알고리즘을 이용한 무선 메쉬 네트워크의 성능 개선)

  • Lee, Hye-Rim;Moon, Il-Young
    • The Journal of Advanced Navigation Technology
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    • v.14 no.2
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    • pp.253-259
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    • 2010
  • Wireless mesh network is flexible network like Ad hoc network or bluetooth together based on base station. But, wireless mesh network shows high packet loss and when TCP was created, however as it was design based on wired link, wireless link made more transmission error than wired link. It is existent problem of TCP congestion control algorithm that TCP unfairness and congestion collapse over wireless mesh network. When TCP operation occurs with the packet loss where is not the congestion loss, it brings the performance degradation which is serious. In this paper, in order to improve efficient TCP congestion control algorithm in wireless mesh network, we proposed that TCP can adaptively regulate the congestion window in wireless link.

Clustering Formation and Topology Control in Multi-Radio Multi-Channel Wireless Mesh Networks

  • Que, Ma. Victoria;Hwang, Won-Joo
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.33 no.7B
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    • pp.488-501
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    • 2008
  • Convergence of various wireless systems can be cost effectively achieved through enhancement of existing technology. The emergence of Wireless Mesh Network (WMN) entails the interoperability and interconnection of various wireless technologies in one single system. Furthermore, WMN can be implemented with multi-radio and multi-channel enhancement. A multi-radio, multi-channel wireless mesh network could greatly improve certain networking performance metrics. In this research, two approaches namely, clustering and topology control mechanisms are integrated with multi-radio multi-channel wireless mesh network. A Clustering and Topology Control Algorithm (CTCA)is presented that would prolong network lifetime of the client nodes and maintain connectivity of the routers.

An Efficient Mobility Support Scheme based Multi-hop ARP in Wireless Mesh Networks (무선메쉬 네트워크 환경에서 다중홉 ARP 기반의 효율적인 이동성 지원)

  • Jeon, Seung-Heub;Cho, Young-Bok;Lee, Sang-Ho
    • Journal of the Korea Society of Computer and Information
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    • v.14 no.11
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    • pp.91-96
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    • 2009
  • In this paper, interoperability in heterogeneous wireless mesh network, and mesh nodes for providing efficient IP mobility technique offers multi-hop ARP. Heterogeneous wireless mesh networks to MANETs based on a wireless mesh network backbone and non-MANET architecture is based on a client wireless mesh network and the two mobile networks, combined with a hybrid wireless mesh network are separate. In two different hybrid wireless mesh network routing protocols used to connect the two protocols in the protocol conversion at the gateway to parallel processing problems seriously overload occurs. All of the network reliability and stability are factors that reduce. Therefore, for efficient integration with L3 routing protocols, design techniques to build ARP multi-hop go through the experiment to increase the number of mesh nodes, the packet forwarding rate and an increased hop number of the node was to ensure reliability and stability.

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A Study on Multicast Routing Metric for Wireless Mesh Network (WMN의 멀티캐스트 라우팅 메트릭에 대한 연구)

  • Gao, Hui;Lee, Hyung-Ok;Nam, Ji-Seung
    • Proceedings of the Korean Society of Computer Information Conference
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    • pp.101-103
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    • 2012
  • This paper gives an introduction to multicast in wireless mesh networks. The factors to be addressed when designing a multicast protocol for wireless mesh network are presented. Emphases are paid on selection of multicast routing metrics in wireless mesh networks. Also details of adapting these metrics to gain high-throughput multicast in wireless mesh network are described in the paper.

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A Study on the Authentication Mechanism for Wireless Mesh Network (무선 메쉬 네트워크를 위한 인증 메커니즘에 관한 연구)

  • Kim, Tae Kyung
    • Journal of the Korea Society of Digital Industry and Information Management
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    • v.5 no.3
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    • pp.117-126
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    • 2009
  • Wireless mesh networks (WMNs) consist of mesh routers and mesh clients, where mesh routers have minimal mobility and form the backbone of WMNs. They provide network access for both mesh and conventional clients. The integration of WMNs with other networks such as the Internet, cellular, IEEE 802.11, IEEE 802.15, IEEE 802.16, sensor networks, etc., This paper presents a secure and efficient authentication mechanism for Wireless mesh network. The validity of proposed mechanism is provided by BAN logic and the efficiency of suggested mechanism is showed through the performance evaluation.