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Dissertations / Theses on the topic 'Seamless handover'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Aldalaty, Khalid. "Mobile IP handover delay reduction using seamless handover architecture." Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-6149.

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Seamless communication is becoming the main aspect for the next generation of the mobile and wireless networks. Roaming among multiple wireless access networks connected together through one IP core makes the mobility support for the internet is very critical and more important research topics nowadays. Mobile IP is one of the most successful solutions for the mobility support in the IP based networks, but it has poor performance in term of handover delay. Many improvements have been done to reduce the handover delay, which result in two new standards: the Hierarchical MIP (HMIP) and the Fast

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2

Ghosh, Arindam. "Investigating seamless handover in VANET systems." Thesis, Middlesex University, 2016. http://eprints.mdx.ac.uk/21317/.

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Wireless communications have been extensively studied for several decades, which has led to various new advancements, including new technologies in the field of Intelligent Transport Systems. Vehicular Ad hoc Networks or VANETs are considered to be a long-term solution, contributing significantly towards Intelligent Transport Systems in providing access to critical life-safety applications and infotainment services. These services will require ubiquitous connectivity and hence there is a need to explore seamless handover mechanisms. Although VANETs are attracting greater commercial interest, c

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Ickin, Selim. "Implementation of Measurement Module For Seamless Vertical Handover." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-5104.

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Research on heterogeneous seamless handover has become popular, since the wireless networking systems were introduced with mobility. The typical current vertical handover mechanism consists of an architecture built at Layer 3 and implemented to serve for different technologies. Even though it has advantages in terms of simplicity, there still exist drawbacks such as the need of adaptation of the network architecture to different network technologies and systems. Providing transparency to the heterogeneous seamless handover can be provided by conducting the handover process at a higher layer. B

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Hedge, Vinayak. "SEAMLESS HANDOVER AT HIGH SPEEDS FOR CELLULAR RANGE TELEMETRY." International Foundation for Telemetering, 2017. http://hdl.handle.net/10150/627024.

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Cellular based Range Telemetry provides a lot of benefits over legacy Aeronautical Mobile Telemetry, such as: • Higher capacity, allowing multiple test articles (i.e. telemetry radio links) which have active telemetry data measurements exchanged in near real time. • Bi-directional radio links, that can allow new signaling with the avionics equipment on the test articles. • Higher performance provided by spectrally efficient OFDMA waveform used in LTE and the dynamic lin

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Deng, Feng. "Seamless Handover between CDMA2000 and 802.11 WLAN using mSCTP." Thesis, University of Canterbury. Electrical and Computer Engineering, 2006. http://hdl.handle.net/10092/1174.

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With the deployment of 3G networks and gradual implementation of wireless networks, seamless handover between these wireless networks is becoming an increasingly desirable. mSCTP (Mobile Stream Control Transmission Protocol) is a new protocol developed from SCTP (Stream Control Transmission Protocol) to provide seamless handover based on IP networks. This thesis studies how to use this new protocol to handle handovers on transport level between CDMA2000 and WLAN networks. A survey of recently proposed and used mobility protocols is presented, comparing three common handover protocols op

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Khosravi, Sara. "Seamless Millimeter-wave Connectivity via Efficient Beamforming and Handover." Licentiate thesis, KTH, Radio Systems Laboratory (RS Lab), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-292472.

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Extremely high data rate demands, and the spectrum scarcity at the microwave bands, make the millimeter wave (mmWave) band a promising solution to satisfy the high data rate demands in wireless networks. The main advantage of moving to the mmWave spectrum is the availability of large bandwidth. Moreover, due to an order of magnitude smaller wavelength of mmWave signals in compared to the conventional bands, many antenna elements can be incorporated in a small size chip to provide high directivity gain both at the transmitter and the receiver sides.Millimeter wave links experience severe vulner

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7

Isaksson, Lennart. "Seamless communications : seamless handover between wireless and cellular networks with focus on always best connected /." Karlskrona : Department of Telecommunications, School of Engineering, Blekinge Institute of Technology, 2007. http://www.bth.se/fou/Forskinfo.nsf/allfirst2/81f841f7e9b75346c12572ab0071ddb4?OpenDocument.

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8

Magagula, Linoh A. "A network-based coordination design for seamless handover between heterogeneous wireless networks." Doctoral thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/10801.

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Includes bibliographical references (leaves 136-144).<br>The rapid growth of mobile and wireless communication over the last few years has spawned many different wireless networks. These heterogeneous wireless networks are envisioned to interwork over an IP-based infrastructure to realize ubiquitous network service provisioning for mobile users. Moreover, the availability of multiple-interface mobile nodes (MNs) will make it possible to communicate through any of these wireless access networks. This wireless network heterogeneity combined with the availability of multiple-interface MNs creates

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9

Bonfim, Michel Sales. "Um Mecanismo de Melhoria de Handovers Verticais Utilizando EndereÃamento Multicast e ServiÃos do MIH 802.21." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7648.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>O uso de dispositivos multi-interface, tais como smart phones, tem crescido ao mesmo tempo que as demandas por melhores serviÃos de mobilidade em redes heterogÃneas. Neste cenÃrio, a ideia da continuidade de serviÃos tornou-se um requisito crucial. Para atender essas demandas, esquemas eficientes de handover devem ser desenvolvidos com o objetivo de alcanÃar o chamado Handover Transparente, que significa a mudanÃa de domÃnios de rede de uma forma transparente e sem a descontinuidade dos serviÃos para o usuÃrio final. Atualmente, ex

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10

Emeksiz, Deniz. "Object Tracking System With Seamless Object Handover Between Stationary And Moving Camera Modes." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615190/index.pdf.

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As the number of surveillance cameras and mobile platforms with cameras increases, automated detection and tracking of objects on these systems gain importance. There are various tracking methods designed for stationary or moving cameras. For stationary cameras, correspondence based tracking methods along with background subtraction have various advantages such as enabling detection of object entry and exit in a scene. They also provide robust tracking when the camera is static. However, they fail when the camera is moving. Conversely, histogram based methods such as mean shift enables object

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Elsafty, Aisha Mohamed-Salama. "A naming and trust approach for seamless handover in multiple-interface mobile devices." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648173.

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12

Lau, Chee Kong Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Improving mobile IP handover latency on end-to -end TCP in UMTS/WCDMA networks." Awarded by:University of New South Wales. School of Electrical Engineering and Telecommunications, 2006. http://handle.unsw.edu.au/1959.4/22806.

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Due to terminal mobility and change of service area, efficient IP mobility support is an important aspect in UMTS networks in order to provide mobile users negligible packet loss rate and low handover latency, and thus some level of guaranteed quality-ofservice (QoS) to support real-time applications. 3G/UMTS has been specified and implemented as an end-to-end mobile communications system. The underlying WCDMA access systems manage radio access handover (layer 1) and provide linklayer mobility (layer 2) in terms of connection setup and resource management. For the UMTS nodes to have seamless c

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13

Martelli, Matteo. "Design and development of a software architecture for seamless vertical handover in mobile communications." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/12237/.

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In this work I firstly present an overview on current wireless technology and network mobility focusing on challenges and issues which arise when mobile nodes migrate among different access networks, while employing real-time communications and services. In literature many solutions propose different methods and architectures to enhance vertical handover, the process of transferring a network communication between two technologically different points of attachment. After an extensive review of such solutions this document describes my personal implementation of a fast vertical handover

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Kassar-Ben, Jemaa Meriem. "Gestion du handover vertical dans les réseaux sans fil hétérogènes." Paris 6, 2009. http://www.theses.fr/2009PA066742.

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Cette thèse se base sur le besoin pour un utilisateur mobile d'accéder à ses services IP en tout lieu, à tout moment et de la meilleure manière possible (ABC, Always Best Connected). Elle étudie une architecture d'Interworking 3G/UMTS-WLAN en couplage loose pour faire coopérer des réseaux sans fil hétérogènes. Cette architecture, prouvée par sa faisabilité et sa simplicité, se base sur le protocole Mobile IP afin de gérer la mobilité des utilisateurs pour une continuité de service. Cette thèse propose un schéma de gestion du handover contrôlé par le mobile que nous intégrons à l'architecture d

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Jaff, Esua Kinyuy. "IP mobile multicast over next generation satellite networks : design and evaluation of a seamless mobility framework for IP multicast communications over a multi-beam geostationary satellite network." Thesis, University of Bradford, 2016. http://hdl.handle.net/10454/14581.

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The inherent broadcast nature of satellites, their global coverage and direct access to a large number of subscribers give satellites unrivalled advantages in supporting IP multicast applications. A new generation of satellite systems that support regenerative on-board processors and multiple spot beam technology have opened new possibilities of implementing IP multicast communication over satellites. These new features enable satellites to make efficient use of their allocated bandwidth resources and provide cost effective network services but equally, create new challenges for mobile satelli

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Jaff, Esua K. "IP Mobile Multicast over Next Generation Satellite Networks. Design and Evaluation of a Seamless Mobility Framework for IP Multicast Communications over a Multi-beam Geostationary Satellite Network." Thesis, University of Bradford, 2016. http://hdl.handle.net/10454/14581.

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The inherent broadcast nature of satellites, their global coverage and direct access to a large number of subscribers give satellites unrivalled advantages in supporting IP multicast applications. A new generation of satellite systems that support regenerative on-board processors and multiple spot beam technology have opened new possibilities of implementing IP multicast communication over satellites. These new features enable satellites to make efficient use of their allocated bandwidth resources and provide cost effective network services but equally, create new challenges for mobile

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Valdenebro, González Fernando. "Energy-efficient enhancements for IEEE 802.11 WLANs : On the way to enable Cellular/Wi-Fi networks interworking." Thesis, KTH, Radio Systems Laboratory (RS Lab), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-142357.

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Globally, the number of mobile broadband subscriptions is growing and the amount of mobile data traffic is expected to continue to grow rapidly. In the next five years the number of smartphone subscriptions is expected to more than double, while the amount of mobile traffic per active subscription per month of these subscribers is expected to nearly quadruple. As a consequence, mobile network operators (MNOs) aim to increase radio network capacity and coverage through heterogeneous deployments. In such heterogeneous networks, wireless local area networks (WLANs) are integrated with wireless wi

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Yousaf, Faqir Zarrar [Verfasser]. "Seamless Handover in Mobile IP-based Next Generation Networks : A Cross-Layer Solution for Ubiquitous Communication over Optimized Routes in IPv6 Networks / Faqir Zarrar Yousaf." Aachen : Shaker, 2010. http://d-nb.info/1080766898/34.

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19

Bergh, Andre E. "Prediction assisted fast handovers for seamless IP mobility." Master's thesis, University of Cape Town, 2006. http://hdl.handle.net/11427/5248.

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Word processed copy.<br>Includes bibliographical references (leaves 94-98).<br>This research investigates the techniques used to improve the standard Mobile IP handover process and provide proactivity in network mobility management. Numerous fast handover proposals in the literature have recently adopted a cross-layer approach to enhance movement detection functionality and make terminal mobility more seamless. Such fast handover protocols are dependent on an anticipated link-layer trigger or pre-trigger to perform pre-handover service establishment operations. This research identifies the pra

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Azevedo, João Pedro Coelho de. "Wireless distributed mobility management on a road scenario." Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/14936.

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Mestrado em Engenharia Eletrónica e Telecomunicações<br>In today's world, connectivity is an important requirement for the population. People want and, in a broad range of cases, need to be connected with each other and with the world. To share a video, attend an e-meeting or just keep in touch with friends and family, Internet is truly part of our everyday life. However, this massive growth of the connected world presented a lot of challenges to the engineering task-forces and research teams in computer networks. One of these challenges is mobility. The network mobility theme is not a

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TAMEA, GABRIELE. "Seamless handover among heterogeneous wireless networks." Doctoral thesis, 2011. http://hdl.handle.net/11573/917963.

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The present thesis introduces decision criteria for the handover among heterogeneous wireless networks also known as vertical handover. The goal is to select the best network that can support the required service(s) and avoid excessive switching among di erent networks in order to minimize service interruptions and power consumption. Firstly we address the vertical handover between speci c broadcast technologies using a single aggregate function (SAF), then we generalized the approach in order to consider heterogeneous technologies and their possible optimization at link layer. To avoid unne

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Yi-Chung, Chen, and 陳怡中. "Network Cost Minimization for Seamless Vertical Handover." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/qw6k6z.

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碩士<br>國立交通大學<br>電信工程系所<br>92<br>In the next generation of mobile system, it is expected to support the concept of Always Best Connected (ABC). Besides, from user’s perspective, the seamless vertical handover for real-time service is also very important. Therefore, in this thesis, we focus on the integration of 3G UMTS and WLAN through loosely-coupled interworking architecture, and propose a scheme called “Designated Crossover Point” (DCP) to execute vertical handover in a fast way. Next, we let the DCP to handover to increase routing efficiency, and finally, by the value iteration method of Ma

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Lu, Te-pei, and 呂德培. "Seamless WLAN to Mobile Handover with MPTCP." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/85691199824339433453.

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碩士<br>國立中央大學<br>通訊工程學系<br>102<br>In today, the mobile users can use a device with multiple interfaces to access services and walk in the heterogeneous networks environment. One important thing is seamless handover. Multipath TCP (MPTCP) is a major extension to TCP and can send data with two paths. The full-mode of MPTCP working operations can support seamless handover. MPTCP has low performance efficiency with two asymmetric paths parameters. For improve performance, we use a handover decision method to start up MPTCP. We implement experiments in real-world WLAN to mobile scenario.

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Liu, Yu-Juin, and 劉禹均. "Adaptive Multicast Video Streaming System with Seamless Handover." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/48988138132635654257.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>93<br>Accessing multimedia services, like video streaming, via Wireless LAN is expected to become one of the most popular approaches for video services. Though WLANs provide simple and low cost methods of connectivity, some properties like bandwidth instability, bursty packet loss, fading and multipath interference make video streaming over WLANs a challenge. When transmitting multicast video stream packets over WLANs, the Access Points do not adaptively adjust the video bit rate, physical bit rate and proprietary packet size according to the changeful channel condi

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Ho, Hsin-Yi, and 賀馨誼. "A Seamless Handover Scheme with Pre-registration in NEMO." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/14064883623743646556.

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碩士<br>淡江大學<br>資訊工程學系資訊網路與通訊碩士班<br>96<br>IETF(Internet Engineering Task Force) proposed the Management Mechanism of NEMO (NEtwork MObility) to support network mobility. The mobility management of NEMO is an extension of Mobile IPv6 (MIPv6), and it inherits also all the drawbacks of MIPv6 such as inefficient routing, high handover latency, packet loss rate, and so on. The purpose of method which is based on the public transportations (e.g. Train, MRT, Bus etc.) with fixed path as NEMO application solved the handover latency problem and packet lost problem. We propose a seamless handover Scheme w

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Lee, Cheng-Wei, and 李振維. "On the Network Mobility Management Scheme with Seamless Handover." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/36720157909987394355.

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博士<br>國立臺灣大學<br>資訊管理學研究所<br>100<br>The evolution of wireless access technologies has led to a new era of mobile Internet for high speed vehicles. Network mobility is particularly suitable for vehicles because it considers the mobility of an entire network. Vehicles perform handover frequently thus efficient handover is essential to meet the QoS requirements for real-time communications. When moving with high speed, the time constraint is even stricter and the Doppler Effect increases the transmission error rate that both add challenges in mobility management. In this dissertation, we first stu

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Tseng, Hsin-Hao, and 曾信豪. "Digital Video Multi-casting System with Seamless Handover Mechanism." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/5648yf.

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碩士<br>國立臺北科技大學<br>電腦與通訊研究所<br>96<br>Since the European Telecommunications Standards Institute (ETSI) developed the DVB-H standard, digital TV is entering the field of handheld applications. But the existing handheld devices, such as personal digital assistants (PDA) or smart phones require additional equipment to use. Relatively speaking, most PDAs have built-in WLAN (IEEE 802.11b). If we can convert DVB-H services after receiving, then broadcasting over the WLAN environment. We can provide digital TV services in building such as the museum or indoor. When the handheld device moving in the ind

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Hsieh, Han-Feng, and 謝漢風. "A Seamless Handover Method for SIP in A WLAN Environment." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/34197021634182551770.

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碩士<br>大葉大學<br>資訊工程學系碩士班<br>95<br>The Session Initiation Protocol (SIP) is constantly gaining in popularity and acceptance as the signaling protocol for voice communications. However, as the popularity of WLANs and mobile devices, the mobility management of SIP becomes an important issue. In order to solve the mobility problem, the SIP mobility was proposed. Unfortunately, the SIP mobility has the disadvantage of the long SIP signaling delay that will disturb the voice communication. In this paper, we propose and simulate a handover method to reduce the SIP signaling delay. The idea is

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Hsu, Nai-Chun, and 許迺群. "Research for Video Streaming Seamless Handover over Heterogeneous Broadband Networks." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/55736585063234205272.

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碩士<br>大同大學<br>通訊工程研究所<br>98<br>At the present time, Ethernet is one of the most widespread networking technologies with high bandwidth, high stability and high security to meet the needs of corporate networks. However, it just highly limited the utilization of Ethernet since it lacks mobility and it also leads to messy tangled very often. 　　Recently, Wi-Fi has been quite mature already and it provides very high-speed transmission as well. Somehow the electromagnetic interference and the security issues are giving users and service providers headaches all the time. Therefore, a hybrid network

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Cheng, Chih-Chung, and 鄭治中. "MIH-based Congestion Control with Seamless Handover in Untrusted Heterogeneous Networks." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/4485u5.

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碩士<br>東海大學<br>資訊工程學系<br>105<br>Recently, a user equipment (UE) is often equipped with more than one RAT (Radio Access Technology) to adapt itself to a heterogeneous network environment which comprises network systems of different models. On the other hand, besides the homogeneous/heterogeneous relationship between two adjacent network systems, e.g., M and N, the relationship between M and N can also be trustable and untrusted. We say M and N are trustable when they belong to the same alliance group, meaning they have signed a contract promising to provide network services to users of the other

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TSAI, PO-YU, and 蔡柏裕. "IP-based Seamless Handover Scheme using ANDSF in an Untrusted Environment." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/qb7h2z.

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碩士<br>東海大學<br>資訊工程學系<br>105<br>In an inter-wireless-communication system, when a UE needs to hand over to an untrusted network, e.g., M, from its serving network, e.g., N, how to choose M if several are there and the best base station under M currently is a problem yet to be completely solved, no matter whether M and N belong to the same alliance group or not and no matter whether M and N are homogeneous or heterogeneous networks. In fact, 3GPP recommended Access Network Discovery and Selection Function (ANDSF) to solve this problem when N is a 3GPP network and M is a non-3GPP system or vice v

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Lee, Lung-Sheng, and 李龍昇. "Design and Analysis of Seamless Fast Handover Schemes for WiMAX Networks." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/24203620081907956578.

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博士<br>國立交通大學<br>資訊科學與工程研究所<br>100<br>The goal of this dissertation is to develop seamless fast handover schemes for supporting real-time traffic and multicast broadcast service (MBS) in WiMAX networks. The IEEE 802.16e provides QoS for real-time traffic; however, packet transmission disrupted by the handover (HO) process is still a big concern, especially when frequent HO is performed by mobile stations (MSs) with high mobility. Therefore, an HO scheme that supports frequent HO and also provides short service disruption time is necessary for providing QoS to real-time traffic. In this disserta

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Lin, Yan-min, and 林彥名. "Adaptive Seamless Handover for Real-Time Traffic in WiMAX Mobile Networks." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/51835396519382962732.

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碩士<br>國立中正大學<br>資訊工程所<br>97<br>Based on the IEEE 802.16e family, WiMAX provides high data rate and long transmission radius, which can be adopted to solve the issue of the wireless-based last-mile. WiMAX becomes the next generation standard of the wireless metropolitan area networks (WMANs). For early performing the initial ranging during handoff, the IEEE 802.16e specifies an association mechanism in MAC layer. It is difficult for configure scan duration in association mechanism, because 1) when MS missed the transmission opportunity and 2) received a RNG-RSP message that the response status

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Liao, Bi-ling, and 廖碧玲. "Application-Layer Handover for Seamless Multimedia Service using SIP in Heterogeneous Networks." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/89769397437596928391.

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碩士<br>國立成功大學<br>工程科學系碩博士班<br>97<br>The wireless network technology has already developed multiplicity now, for example WiFi, WiMAX, HSDPA,etc. They have different bandwidth , coverage rate of the network and payment. With the development and popularization of these network technologies, portable devices have multiple network interface on the market now, such as computer, intelligent cell-phone,etc. This can supply users multiple choice. But when using the network multimedia service in the heterogeneous network ,the mobility of the user often results in bad quality of service and even the shutd

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Wang, Chih-Sheng, and 王植生. "An IEEE 802.16e Adaptive Seamless Handover Mechanism Design for SVC Coded Video Streaming Services." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/68225175031718105988.

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碩士<br>國立中央大學<br>通訊工程研究所<br>97<br>In recent years, many issues around seamless handover have been discussed. From the user’s experience of view, however, seamless handover is not equal to seamless service at all, especially for video streaming services. A mobile station can suffer a service interruption during the handover due to the lack of video data provided regardless how fast to finish the handover. On the other hand, the Scalable Video Coding can provide a flexible combination of layer representations to fit the channel condition and the capacity of the user station to maintain a reasonab

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Wu, Chen-Yu, and 吳振宇. "The Study of a Novel Seamless Streaming Playback Control Scheme for MIH-based Handover." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/02534991542514043047.

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碩士<br>淡江大學<br>電機工程學系碩士在職專班<br>101<br>Nowadays more and more people access and exchange information of any kind freely at anytime, from anywhere, and from any appliance through the use of heterogeneous network technologies (such as IEEE 802.1 series protocols and 3GPP). Mobile video streaming services and its’ performance are interrupted by the handover events when switching among the heterogeneous networks. The IEEE organization has provided the standard IEEE 802.21(MIH) to facilitate handover process among different radio technologies. A previous work, so-called Service Specific layer (SSL) s

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Chiang, Yi-Rong, and 姜宜榮. "Design and Implementation of a Topology-Aware Seamless Handover for IEEE 802.11 Wireless Networks." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/25097000213031118596.

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碩士<br>國立交通大學<br>資訊科學與工程研究所<br>94<br>In this thesis, we propose a topology-aware “Target APs Search and Measurement” scheme that can reduce the handover latency of IEEE 802.11-based Wireless LANs. In recent years, 802.11-based wireless LANs, as Hot Spots, has been successfully and widely deployed in public places. Many services arise with the growth of 802.11-based wireless LAN, and VoIP and similar multimedia applications, in particular, have become the well-known services. However, most of the current implementation of 802.11-based networks only attempts a handover when a client’s service deg

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Hsu, Ming Kuo, and 徐明國. "The Study of SIP Seamless Handover with The RTP Extension Message in A WLAN Environment." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/72755489443611603150.

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碩士<br>大葉大學<br>資訊工程學系碩士在職專班<br>95<br>The Session Initiation Protocol (SIP) is an application-layer protocol for creating, modifying, and terminating media sessions with one or more participants. However, in the WLAN environment, the mobility management of SIP voice sessions becomes an important issue. The SIP mobility was proposed for the SIP voice session mobility problem. However, the SIP mobility has the disadvantage of the long SIP signaling delay which significantly degrades the quality of voice communications. In this paper, we propose and simulate a handover method to reduce the

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Wang, Yu-Chin, and 王裕欽. "The Research of Seamless Handover with Buffer Prediction for Wireless Networks Based on IEEE 802.21." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/16436524069703174529.

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碩士<br>淡江大學<br>電機工程學系碩士班<br>96<br>Future generations of wireless networks will place great demands on the performance of radio access technology and the real-time multimedia applications provided by these new wireless environments. During the mobility between heterogeneous wireless networks, the quality of multimedia services for users depends heavily on seamless handover which should be provided by the middleware of IP to MAC protocol stack. IEEE 802.21 is designed for this reason which provided the basic platform for seamless handover between heterogeneous wireless networks. Due to each ki

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Lin, Jia-Ling, and 林嘉鈴. "Performance Analysis of the Seamless Spectrum Handover With Queue And Guard Channel in Cognitive Radio Network." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/38377467230124975163.

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碩士<br>國立中央大學<br>通訊工程研究所<br>98<br>The wireless network technology has significant progress and various mobile communication equipment and applications also become more and more. Demand of spectrum resource is increasing, therefore spectrum resource is valuable relatively. In recent years, IEEE and FCC are currently developing wireless network standards related to the cognitive radio network technology. In addition, the FCC opening the broadcast television band’s white Space by voted in November 2008 , that let the broadband technology proceed to lead a new . However, cognitive radio network o

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Lin, Hung-Wei, and 林弘偉. "The Research of Seamless Handover with Dynamic Playback Control for Multicast Streaming Based on IEEE 802.21." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/83411072725859164133.

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碩士<br>淡江大學<br>電機工程學系碩士班<br>98<br>The Internet multimedia applications are more and more popular at the present age. A lot of applications become parts of our life such as online game, network TV, video phone and etc. In these services, the network transmission arrive rate will affect the video streaming quality directly. Multimedia service will be delayed or interrupted by end-to-end time delay, jitter, frame error, and packet loss. However, these facts would also happen during handover. There are many kinds of wireless, from IEEE 802 families to UMTS network, even more 3GPP LTE. These network

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Huang, Ta-hsien, and 黃德軒. "An Efficient and Seamless Multicast Handovers Mechanism for Fast MIPv6." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/26779104420322741234.

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碩士<br>國立中正大學<br>資訊管理所暨醫療資訊管理所<br>97<br>In today’s wireless mobile network, people send packets to not only one person but also one group which is called multicast. However, when people receive multicast packets during handovers, they might encounter several problems such as packet loss, inefficient handovers, join latency, tunnel convergence and security issues. In this thesis, we propose a mobile multicast mechanism based on Fast Multicast Protocol for Mobile IPv6 to provide an efficient and secured environment during handovers. To achieve this, we use an AAA server and EAP method to provide

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Liao, Kuan-Ming, and 廖冠銘. "Crossover Node Discovery for Seamless Handovers in IEEE 802.11s Wireless Mesh Networks." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/94966952336852843856.

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碩士<br>國立交通大學<br>資訊科學與工程研究所<br>97<br>In this thesis, we proposed an effective Crossover Node (CrN) discovery mechanism for Mobile Nodes (MN), which may change their attached Mesh Access Points (MAPs), in IEEE 802.11s Wireless Mesh Networks (WMNs). A CrN for an MN is the intersection of the path from a corresponding node (CN), which is communicating with the MN, to the MN’s old Access Point (oAP) and the one from the CN to the MN’s new AP (nAP). Finding CrNs for an imminent handover is crucial to some seamless handover schemes. Micro-mobility schemes employ CrNs to localize location updates and

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