• Title/Summary/Keyword: IP tunneling

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Performance Evaluation of Mobile IP Using NHRP for Supporting Mobility over ATM Networks (ATM 망에서 NHRP를 이용한 Mobile IP 이동성 지원 방안의 성능평가)

  • 이성탄;변태영
    • Proceedings of the Korean Information Science Society Conference
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    • 2001.10c
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    • pp.811-813
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    • 2001
  • 본 논문에서는 기존의 IP 망에서 호스트의 이동성을 지원하기 위한 Mobile IP 개념을 ATM 망에 적용할 경우, Mobile IP망에서 Home Agent와 Foreign Agent 사이에 존재하는 Mobile-IP 터널링 구간을 기존의 LAN 기반의 IP 터널링 구간과 ATM 망에서의 단거리 터널링(short-cut tunneling) 구간으로 구분하여 관리하는 방안을 제안하였다. Short-cut 터널링을 설정하기 위하여 NHRP를 이용하였으며 Shot-cut 터널링을 이용함으로써 HA 와 FA 사이에 데이터 전달 지연을 기존의 IP 터널링에서의 데이터 전달 지연보다 줄일 수 있음을 시뮬레이션을 통해 확인하였다.

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Study of applicable security tunneling technique for military wireless network (군 무선네트워크 환경에서 적용 가능한 보안 터널링 기법 연구)

  • Kim, Yun-young;Namkung, Seung-Pil
    • Convergence Security Journal
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    • v.15 no.4
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    • pp.107-112
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    • 2015
  • Due to the rapid development of wireless communication technology, foundation system of military communication that is based on the daily use technology has been changed in to wireless system. However, military communication contains clssified information, and it is expected to have increase amount of enemy's there in such a imperfect security system. The next generation of tactical network communication system is expected to adopt All IP based wireless system. This research studies expected threatening factor on the wireless environment, and find the appropriate tunneling techniques.

A Study on the Mobile IP Routing Optimization through the MRT Agent (MRT 에이전트를 통한 Mobile IP 라우팅 최적화에 관한 연구)

  • 김보균;홍충선;이대영
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.28 no.9A
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    • pp.728-735
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    • 2003
  • It is a mainly issue that provide mobility smoothly in Mobile IP networks. The IP mobility support being standardized in the IETF utilized tunneling of IP packets from a home agent to foreign agent and utilized reverse tunneling of IP packets from foreign agent to home agent. In this paper, We propose that solve the triangular routing problem in IP mobility and that lessen the messages about IETF routing optimization. Through the Mobile Routing Table on the edge router, agent process the message instead of a end node when handoff occur and that lessen the routing path length by sending directly from FA to to Correspond Node's router. This action lessen the message occurrence frequency and the packet drop. We compare the standard IP, Routing Optimization of Mobile IP, Wu's method and the proposed algorithm. Finally, the simulation results are presented.

Multiplexed Compressed RTP for All-IP Environment (All-IP 환경에서의 RTP헤더 압축 및 다중화 기법)

  • 홍진우;장원갑
    • Proceedings of the IEEK Conference
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    • 2002.06a
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    • pp.311-314
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    • 2002
  • This paper deals with an improved method of utilizing end-to-end bandwidth in the All-IP environment. The proposed method includes compression of UDP/RTP headers, and multiplexing of the RTP stream packets over the end-to-and media transfer. Although the conventional method of using TCRTP(Tunneling Multiplexed Compressed RTP) is an efficient mettled of maximizing tile network throughput, it is inadequate for the All-IP based end-to-end communication. The method is a link-layer independent solution that can be easily implemented in the NGN(Next Generation Network).

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Implementation of UDP-Tunneling Based Multicast Connectivity Solution for Multi-Party Collaborative Environments (다자간 협업 환경을 위한 UDP 터널링 기반의 멀티캐스트 연결성 솔루션의 구현)

  • Kim, Nam-Gon;Kim, Jong-Won
    • Journal of KIISE:Computing Practices and Letters
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    • v.13 no.3
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    • pp.153-164
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    • 2007
  • The Access Grid (AG) provides collaboration environments over the IP multicast networks by enabling efficient exchange of multimedia contents among remote users; however, since lots of current networks are still multicast-disabled, it is not easy to deploy this multicast-based multi-party AG. For this problem, the AG provides multicast bridges as a solution by putting a relay server into the multicast networks. Multicast-disabled clients make UDP connections with this relay server and receive forwarded multicast traffics in unicast UDP packets. This solution is facing several limitations since it requires duplicate forwarding of the same packet for each unicast peer. Thus, in this paper, we propose an alternate solution for the multicast connectivity problem of the AG based on the UMTP (UDP multicast tunneling protocol). By taking advantage of flexibilities of UMTP, the proposed solution is designed to improve the efficiency of network and system utilization, to allow reuse of multicast-based AG applications without modification, and to partially address the NAT/firewall traversal issues. To verify the feasibility of proposed solution, we have implemented a prototype AG connectivity tool based on the UMTP, named as the AG Connector.

A Study of VoIP Secure Gateway (VOIP 보안 게이트웨이에 관한 연구)

  • Park Dea-Woo
    • Journal of the Korea Society of Computer and Information
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    • v.10 no.5 s.37
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    • pp.237-244
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    • 2005
  • IP-Internet Telephony Service has not vet been achieved that of operating an IP-PBX service and a consumer Internet telephone services using VoIP technologies. In this paper, i suggest that the technologies of the VoIP Secure Gateway have connecting and securing for IP-Internet Telephony Service which makes If telephony protocols, firewall VPN tunneling, using Application Level Gateway, connection of the VoIP Secure Gateway. I suggest of telecommunication technologies that are enables an enterprise If-PBX service to interoperate with a consumer IP telephony service through a firewall. Also, I have proposed the solutions of security problems which was the security for VoIP Secure Gateway.

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Study on Improving Vulhearability in IPv4/IPv6 Header Translation Mechanism (IPv4/IPv6 헤더변환 방식에서의 취약성 개선에 관한 연구)

  • 황호준;유승재;김귀남
    • Convergence Security Journal
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    • v.3 no.1
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    • pp.73-84
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    • 2003
  • The IPv4 that used to be generally used as a medium of computer communications in 1980s has reached its limits now. IPv6 (IP Version 6) is being prepared to solve the limitations of the IPv4. However, the biggest problem of IPv6 is that it is not compatible with the IPv4. To resolve the compatibility issue, Dual Stack, Tunneling and Header Converting methods have been proposed. The Header Converting method allows communications between the IPv4 and IPv6 networks with the converter. This method's strength is that it is easy to embody and the procedures for embodiment is simple. However, this method still contains the weaknesses that the existing IPv4 has. On the current document, the Header Converting method among the three methods is discussed to resolve the problems this method has. To solve the Header Converting method's weakness, the security problem between sections, the IP Header field values are converted to the relative field values and IPSec (IP Security) and ESP (Encapsulation Security Payload) are applied. The proposed "Encrypted Header Converting Method" that is encrypted in packet units has solved the weakness that the pre-existing Header Converting method used to have.d to have.

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Mobile IP on MPLS VPN (MPLS VPN에서의 Mobile IP)

  • Lee, Young-Seok;Oh, Myoung-Hwan;Choi, Hoon
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.28 no.8B
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    • pp.738-749
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    • 2003
  • Mobile IP protocol introduced in RFC3344 provides a node of the mobility service through IP tunneling mechanism in the IP networks. In this paper, we describe a method to provide a mobility service for VPN(Virtual Private Network) nodes on the MPLS(Multiprotocol Label Switching) network. The MPLS VPN considered here is based on "BGP/MPLS VPNs" presented in RFC2547. PE(Provider′s Edge) routers, which are able to provide VPN services on the MPLS network, are associated with mobility agents to support Mobile IP This proposed mechanism applies when a VPN node moves to other site of the same VPN, or when it moves to other site of a different VPN, or to the ordinary Internet site. We implemented this mechanism in PE routers and analyzed the performance of the MPLS VPN with mobility support on the testbed.

Performance Evaluation of Short-cut Tunneling Schemes in Optimized Path Method over Mobile IP (이동 IP의 최적경로 방식에서 단거리 터널링 기법의 성능평가)

  • 이경훈;변태영;조무호;마평수
    • Proceedings of the Korean Information Science Society Conference
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    • 2002.10e
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    • pp.22-24
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    • 2002
  • 이동 IP 망에서 이동 IP의 삼각 라우팅 문제를 해결한 최적경로 IP 라우팅 기법은이동 IPv6망에서의 이동성을 지원하는 기본 동작으로 되어있다. 본 논문에서는 이동 IP망의최적 경로 기법을 NBMA망에서의 NHRP를 이용한 단거리 터널설정 기법을 적용하여 그 성능을 평가하였다. 패킷 전달지연 시간 측면에서 기존 IP 라우팅 기법과 최적 경로에서의단거리 터널링 기법을 상호 비교하기 위하여 수학적 분석 및 모의실험을 수행하였다. 최적경로의 단거리 터널링 기법은 기존 IP 라우팅 방식보다 초기 데이터의 경우 종단간 전달 지연시간이 클 수 있으나 이후 패킷부터는 종단간 데이터 전달 지연시간이 대폭 개선됨을 확인하였다.

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The Regional transferring Model for Multicasting Service based on IP (IP 기반 멀티캐스트 서비스의 지역분할 전송 모델)

  • Jang, Kyung-Sung;Kim, Byung-Ki
    • The KIPS Transactions:PartC
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    • v.8C no.5
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    • pp.637-646
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    • 2001
  • The multicasting telecommunication is an important research as an applicable technique in the development of adaptable technique for modern mobile computing and mobile IP, because that is supposed to be a solution for transferring the large-size information on the mobile and wireless network with the narrow bandwidth. This paper will suggest one solution for the bidirectional tunneling and the local re-registration problems to support transferring mobile multicasting datagram by the partitioned network. The bidirectional tunneling technique is in use for mobile host moving around in a region and the local re-registration technique for crossing regions to reduce traffic load caused by transferring datagram along a long distance, and we compare those models with our suggested model by simulation.

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