• Title/Summary/Keyword: Wireless Lan Network

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An Integrated QoS Support Architecture for Wireless Home Network Based on IEEE 802.11 Wireless LAN

  • Hong, Sung-Hwa;Kim, Byoung-Kug;Eom, Doo-Seop
    • Journal of IKEEE
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    • v.11 no.4
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    • pp.227-234
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    • 2007
  • In this paper, to support a QoS level appropriate to the user in Wireless Home Network based Wireless LAN, we propose a QoS support architecture which includes Wired Network and Wireless Network. Actually, an important problem to support QoS in Wireless Home Network is approached not only on a MAC level in Wireless LAN but also on a integrated method to combine Network layer with Datalink layer. By applying the integrated QoS support method, it is possible to provide QoS support architecture using a Wireless LAN terminal with a minimum changing, and the proposed scheme has advantage of QoS support method, which is more superior than a existing scheme to support QoS in MAC level of Wireless LAN. Simulations results show that overall performance of the proposed scheme can be improved.

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Implementation of a Network Processor for Wireless LAN (무선 LAN용 네트웍 프로세서의 설계)

  • 김선영;박성일;박인철
    • Proceedings of the IEEK Conference
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    • 2000.11b
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    • pp.184-187
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    • 2000
  • A network is an important portion of communications in these days. Because of many inconveniences of a wired-network, wireless solutions have been studied for many years. One of the results of those efforts is IEEE 802.11, wireless LAN. This paper briefly summarizes wireless LAN and specially focuses on the design of a network processor for the wireless LAN system. The processor has 16-bit instruction set suitably selected for network processing and low-power consumption. It is implemented and verified with a wireless LAN system model. The wireless LAN system is modeled in RTL excluding the RF module. The processor can be used in many wireless systems as a controller and utilized as a test module for the research of low-power schemes.

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Implementation of an OpenFlow-based Access Point Virtual Switch for Monitoring and Virtualization of Legacy Wireless LAN

  • Lee, Hyung-Bong;Park, Ji-Hoon
    • Journal of the Korea Society of Computer and Information
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    • v.21 no.1
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    • pp.65-72
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    • 2016
  • Network virtualization is an emerging technology for solving the rigidity of the physical network infrastructure. The innovative technique virtualizes all resources in the network, including the network links and nodes, and provides a number of virtual networks on a single network infrastructure. In order to realize a virtual network, a thorough and complete monitoring of all resources in the network should be performed firstly. OpenFlow is an open source stack for network virtualization. However, it is impossible to apply OpenFlow to AP-based legacy wireless LAN environment because OpenFlow targets ethernet-based LAN environment. In this paper, we implement an adaptor-styled virtual switch for AP-based wireless LAN through customizing the Open vSwitch which is a virtual switch of OpenFlow. The evaluation test results show that the implemented OpenFlow stack operates successfully. The implemented OpenFlow stack can now be plugged immediately in existing AP-based wireless LAN environment and plays network resource monitoring. In the future, we can develop wireless LAN virtualization applications on the wireless OpenFlow stack.

Condition Monitoring System: High Performance Wireless Measurement System (기계 상태 감시: 임베디드형의 고성능 무선 측정시스템)

  • Shim, M.C.;Yang, B.S.
    • Journal of Power System Engineering
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    • v.11 no.1
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    • pp.28-32
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    • 2007
  • This research proposed that development of wireless condition monitoring system using WLAN network. It offers the prospect of improved performance that removed a current a coaxial cable and reduced overall cost of condition monitoring. Recently, there is an interesting concern for wireless system as an infrastructure technology construct ubiquitous computing environment in the future. High performance computing board makes minimization with integrate of a various functions which support wireless LAN network. Instead of wired coaxial cable using measurement system in industry, wireless LAN network assists industry automation and engineer's convenience. Developed system adapted wireless LAN network on shipboard with engine room and deck house, it also executes wireless measurement test on 8500TEU containership.

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Performance Analysis of DS/CDMA System in 2.4GHz ISM-band Wireless LAN (2.4㎓ ISM 대역 무선 LAN에서 DS/CDMA 시스템의 성능 분석)

  • 백승선;강희조;박경열
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.5 no.6
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    • pp.1045-1049
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    • 2001
  • Wireless LANs in the 2.4 ㎓ ISM- band create a new Electromagnetic Compatibility (EMC) problem. We investigated the interference characteristics between such wireless LANs in the case of identical systems, systems with different technical parameters for modulation and demodulation, and using a Gaussian noise source as a disturbance source. Experimental results show that higher throughput is obtained when adjacent wireless LANs use different systems, and that interference characteristics can be evaluated experimentally using a Gaussian noise source. Calculated BER characteristics for the interference agree with experimental measurements, indicating that this calculation method can be used for the design of the wireless LAN network to avoid interference. It is possible to construct an efficient wireless LAN network by combining different wireless LAN systems.

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An Integrated QoS Support Architecture of Wireless Home Network Based on IEEE 802.11 Wireless LAN for Multimedia Services (IEEE 802.11 무선랜을 기반으로 하는 무선 홈 네트워크 환경에서의 멀티미디어 서비스를 위한 통합적인 QoS 제공 구조)

  • Hong, Sung-Hwa;Kim, Byoung-Kug;Eom, Doo-Seop
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.33 no.3B
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    • pp.100-111
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    • 2008
  • In this paper, to support a QoS level appropriate for the user in Wireless Home Network based Wireless LAN, we propose a QoS support architecture which includes Wired Network and Wireless Network. Actually, an important problem to support QoS in Wireless Home Network is approached not only on a MAC level in Wireless LAN but on a integrated method to combine Network layer with Datalink layer. Applying the integrated QoS support method. It is possible to provide QoS support architecture using a Wireless LAN terminal with a minimum changing, the proposed scheme has advantage of QoS support method, which is more superior than a existing scheme to support QoS in MAC level of Wireless LAN. Simulation results that overall performance of the proposed scheme can be improved.

An Authentication Interworking Mechanism between Multiple Wireless LANs for Sharing the Network Infrastructure (망 인프라 공유를 위한 무선랜 시스템들간의 상호 인증 연동 방법)

  • Lee Wan Yeon
    • The KIPS Transactions:PartA
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    • v.11A no.6
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    • pp.451-458
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    • 2004
  • The previous studies focussed on the security problem and the fast re-authentication mechanism during handoffs in a single wireless LAN system. When the multiple wireless LAN systems share their network infrastructure one another, we propose an authentication mechanism allowing the subscriber to Perform the authentication procedure with the authentication server of its own wireless LAN system even in areas of other wireless LAN systems as well as in areas of its own wireless LAN system. In the proposed mechanism, the access point or the authentication server of other wireless LAN systems plays a role of the authentication agent between the subscriber and the authentication server of the subscriber's wireless LAN system. The proposed authentication mechanism is designed on the basis of the 802.1X and EAP-MD5 protocols.

Disconnection of Wireless LAN Attack and Countermeasure (무선 LAN 연결 해제 공격과 보안)

  • Hong, Sunghyuck
    • Journal of Digital Convergence
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    • v.11 no.12
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    • pp.453-458
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    • 2013
  • In a wireless LAN environment, security is the most important. Security of 802.11 standard has many vulnerabilities of the network attack. IEEE has created mechanisms to security for this vulnerability. But the vulnerabilities is characteristic of broadcast in the air in wireless LAN, it is more disclosure then other network environments. In a wireless LAN environment, it can be accessed to the wireless LAN after authentication. Authentication process is one of most important because of the first security step. However, in the authentication process is not mentioned in the method of reducing the disclosure maximum fundamental. Therefore, in this research, the vulnerability of 802.11 are presented and how to do de-authentication in 802.11.

The case study on wireless lan design technique for Bansong purification plant using network integrated management system and security switch (네트워크 통합관리시스템과 보안스위치를 이용한 반송정수장 무선랜 구축사례)

  • Park, Eunchul;Choi, Hyunju
    • Journal of Korean Society of Water and Wastewater
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    • v.32 no.4
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    • pp.309-315
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    • 2018
  • Currently, the commercialization of the $5^{th}$ Generation (5G) service is becoming more prevalent in domestic communication network technology. This has reduced communication delay time and enabled large-capacity data transmission and video streaming services in real-time. In order to keep pace with these developments, K-water has introduced a smart process control system in water purification plants to monitor the status of the water purification process. However, since wireless networks are based on the public Long Term Evolution (LTE) network, communication delay time remains high, and high-resolution video services are limited. This is because communication networks still have a closed structure due to expense and security issues. Therefore, with 5G in its current form, it is very difficult to accommodate future services without improving the infrastructure of its communication networks. In recognition of these problems, this study implemented the authentication and management function of wireless networks on a wired network management system in the K-water Bansong water purification plant. The results confirmed that wired Local Area Network (LAN) services give a higher security performance than an expensive commercial wireless LAN system. This was achieved by using an Internet Protocol (IP) address management system of wired networks and the packet filtering function of the Layer2 (L2) switch. This study also confirmed that it is possible to create a wireless LAN service that is 3.7 times faster than the existing LTE communication network.