• Journal of the Institute of Electronics Engineers of Korea CI
• /
• v.41 no.3
• /
• pp.47-54
• /
• 2004

By using wireless terminal, the number of users who wish to use the multimedia service like the Internet as well as Short Message Services and voice service has increased dramatically over the last years. We propose the method that improves Mobile IPv4 (MIPv4) Regional Registration in wireless mobile networks to decrease traffic's transmission delay and message generation compared with an existing method We design the scheme in MIPv4 environments that a packet do not pass through the home agent transmitted from correspondent node to mobile node, if a mobile node moves to other mobility agent. Simulation results show that the proposed method significantly reduces the expenses for registration and delivering packet.

• The KIPS Transactions:PartC
• /
• v.8C no.6
• /
• pp.815-820
• /
• 2001

This paper presents a distributed mobile architecture aimed to support the mobility of mobile station. The proposed architecture considers three significant objects；mobile station (MS), mobile agent (MA) which logically represents mobile station in the wireline network, and trace agent (TA) to represent application server (AS) providing application service to mobile station. The mobile agent is made closely coupled with the mobile station while the trace agent is made closely coupled with the application server. During the handoff process, a flow control mechanism is considered to correct packet loss and out-of-sequence packets problem. The result of analytic additional time delay due to handoff processing is presented and simulation was performed to check the additional time delay as well as the correctness of handoff algorithm.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2011.04a
• /
• pp.607-610
• /
• 2011

본 논문은 WiMAX 와 WLAN 네트워크 간 빠른 핸드오버를 위한 이동성 관리 방안을 제안한다. 제안방안은 MPLS 네트워크 환경을 기반으로 하고, 공용 인증키로써 MA ID(Mobility Agent Identifier)를 할당하여 핸드오버 시 재인증(Re-authentication) 및 IP 재구성을 위한 시그널링 메시지를 간소화시킨다. 따라서 이동노드가 핸드오버 할 때마다 반복적으로 요구되는 두 동작에 대한 처리가 보다 신속히 이뤄지면서 핸드오버 지연 감소의 효과를 보인다. 제안방안에 의한 성능 향상을 검증하기 위해 수식을 이용하여 기존방안과 제안방안의 핸드오버 지연을 분석하였다. 그 결과 제안방안에서의 핸드오버 지연이 기존방안 보다 더 낮음을 확인하였다.

• The KIPS Transactions:PartC
• /
• v.9C no.2
• /
• pp.267-276
• /
• 2002

By using wireless terminal, User that want to transmit multimedia traffic as well as simple text and voice have a tendency to increase. This paper proposes a fast handoff protocol that is suitable transmission for real-tim of multimedia traffic by using modified local registration. The proposed protocol solves the Triangle Routing Protocol that is one of existing opened issues without modifying protocol of CN, and we propose the method that MN is able to received a packet by real-time, even if MN is being handoff. We compare fast handoff protocol proposed in this paper with existing method n the registration cost and data packet transmission cost. As a result, we showed that fast handoff protocol proposed in this paper outperforms existing method.