• Journal of Digital Convergence
• /
• v.10 no.5
• /
• pp.275-281
• /
• 2012

This paper proposes a modular type manager which is implemented to guarantee performance for LBS automatically in the mobile environment. The proposed system consists of modules for the management of scenario, mobility, and statistics. Each module controls the mobility in order to optimize the performance according to the scenario list. The statistics management module records mobility information and quick solution of errors and problems. The implemented system reduced the management cost and improved the management performance by the automatic test which was tested manually before the development of the system.

• Journal of information and communication convergence engineering
• /
• v.6 no.3
• /
• pp.245-248
• /
• 2008

Everytime a node moves out of its area, the connection to the node encounters a handover which may cause much latency. NetLMM(Network based Localized Mobility Management) supports the mobility management for such nodes and improves handover latency using MIH(Media Independent Handover) function. In this paper, we add some messages to NetLMM procedure to improve handover latency and analyze its effects through a scenario based approach

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.11 no.8
• /
• pp.3060-3069
• /
• 2010

LBS is service technique to provide several service which are required to user by user's location information for mobile. This paper presents Auto_Test system of testing the mobility performance of mobile clients in wireless mobile networks. In spite of importance of mobility management, currently the study of mobility management is not enough, therefore we have developed modulated Auto_Test management system for resolve the mobility management. The proposed system is composed of distance-based monitoring, location-based monitoring, scenario management, mobility management and statistic management, it makes the control by individual module. Simulation results show that the proposed system outperforms the existing systems.

• The KIPS Transactions:PartC
• /
• v.17C no.3
• /
• pp.243-250
• /
• 2010

Vehicular communication networking is one of the most important building blocks of Intelligent Transportation System (ITS). The vehicular communication network is a wireless communication system enabling vehicles to communicate with each other as well as with roadside base stations. Mobility management of vehicles which move at high speeds and occasionally make a long journey is an interesting research area of vehicular communication networks. Recently, The Proxy Mobile IPv6 (PMIPv6) protocol is proposed for network-based mobility management to reduce the overhead of mobile nodes. PMIPv6 shifts the burden of the mobility management from mobile nodes to network agents to decrease the overhead and latency for the mobility management. In this paper, we derive the scenario of deploying PMIPv6 in vehicular communication networks and propose a new LMA handover mechanism for realizing the scenario. By carrying out the ns-2 based simulations, we verify the operability of the proposed mechanism.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2007.10a
• /
• pp.63-66
• /
• 2007

Everytime a node moves out, the connection makes handover which occurs much latency. In NetLMM(Network based Localized Mobility Management), network supports the mobility management for nodes and it improves handover latency using MIH(Media Independent Handover) service. In this paper, we shall analyse and improve the handover latency with addition of some messages to NetLMM protocol.

• The Journal of the Korea Contents Association
• /
• v.11 no.9
• /
• pp.54-62
• /
• 2011

This paper proposes both global and local mobility management (MM) scheme improved from Multi Protocol Label Switching (MPLS)-based Mobility Management scheme (MPLS-MOB) for seamless service in Next Generation Network (NGN). The proposed scheme adds local MM on the existing MPLS-MOB which supports global MM by processing handover signaling by 2.5 layer switching via Label Switch Path (LSP) of MPLS. We numerically analyze and verify that the proposed scheme has lower handover latency time than the existing ones, such as micro-MM methods using MPLS as well as MIP and an interworking scenario between PMIP and MIP.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.16 no.8
• /
• pp.1625-1630
• /
• 2012

At this present, there's not made up of communication linking smoothly between the equipment for heterogenous. They are not decided a standardized communication method. The necessity for interlock with various wireless connection is raising its head. And user's terminal is developing with multiplex interface through them to use constant service. This paper study on the algorithm of the wireless heterogenous networks. It's a terminal which have the technology for wireless access about mobility of seperating link technique.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.28 no.10A
• /
• pp.796-806
• /
• 2003

Mobile Node usually communicate with CN bia only it's own HA but Nested Mobile Networks correspond with CN bia all HA involved with them. when Mobile Network of a MR moves from its home link to a foreign link in the stationary network. then Mobile Network of another MR moves from its home link in stationary network to foreign link in previous mobile network. CN send Packet destined to the latter MR via both Home Agent of the former MR and the latter MR. There are two problem in this scenario. One is inefficient routing path that bypass via several HA. the other is waste of transmission resource and delay of Registration process which change of Nested Mobile Network Architecture cause Mobile Router. so We propose MRA(Mobile Relay Agent) to support effective routing by local mobility management.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.10 no.8
• /
• pp.1894-1902
• /
• 2009

As the spread of LBS(Location Based Service), MDT(Mobile Data Terminal) and PDA (Personal Digital Assistant) services using mobile terminals, various systems are under development to to manage the performance of these services. This paper describes a mobile performance management system which is implemented to test the performance of mobility between the user and the terminal or between the terminal and the mobile server automatically in the mobile-user field. The system has four modules: scenario management module, MDT monitoring, LBS monitoring, and PDA monitoring. The scenario management module manages the performance by monitoring all modules. The LBS monitoring module monitors LBS call attempt stage, call connecting stage, and LBS test for established connection. Thus, the LBS monitoring module manages the performance for every stage of the call. The MDT monitoring module monitors the performance according to the input command and the PDA monitoring module monitors according to the input from the set up and the execution menu.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.9 no.10
• /
• pp.4015-4033
• /
• 2015

The future mobile networks consist of hyper-dense heterogeneous and small cell networks of same or different radio access technologies (RAT). Integrating mobile networks of different RATs to provide seamless and smooth mobility service will be the target of future mobile converged network. Generally, handover from high-speed networks to low-speed networks faces many challenges from application perspective, such as abrupt bandwidth variation, packet loss, round trip time variation, connection disruption, and transmission blackout. Existing inter-RAT handover solutions cannot solve all the problems at the same time. Based on the high-layer convergence sublayer design, a new receiver-aided soft inter-RAT handover is proposed. This soft handover scheme takes advantage of multihoming ability of multi-mode mobile station (MS) to smooth handover procedure. In addition, handover procedure is seamless and applicable to frequent handover scenarios. The simulation results conducted in UMTS-WiMAX converged network scenario show that: in case of TCP traffics for handover from WiMAX to UMTS, not only handover latency and packet loss are eliminated completely, but also abrupt bandwidth/wireless RTT variation is smoothed. These delightful features make this soft handover scheme be a reasonable candidate of mobility management for future mobile converged networks.