• Title/Summary/Keyword: Handover scheme

Search Result 326, Processing Time 0.023 seconds

PSS Movement Prediction Algorithm for Seamless hando (휴대인터넷에서 seamless handover를 위한 단말 이동 예측 알고리즘)

  • Lee, Ho-Jeong;Yun, Chan-Young;Oh, Young-Hwan
    • Journal of the Institute of Electronics Engineers of Korea TC
    • /
    • v.43 no.12 s.354
    • /
    • pp.53-60
    • /
    • 2006
  • Handover of WiBro is based on 802.16e hard handover scheme. When PSS is handover, it is handover that confirm neighbor's cell condition and RAS ID in neighbor advertisement message. Serving RAS transmits HO-notification message to neighbor RAS. Transmiting HO-notification message to neighbor RAS, it occurs many signaling traffics. Also, When WiBro is handover, It occurs many packet loss. Therefore, user suffer service degradation. LPM handover is supporting seamless handover because it buffers data packets during handover. So It is proposed scheme that predicts is LPM handover and reserves target RAS with pre-authentication. These schemes occur many signaling traffics. In this paper, we propose PSS Movement Prediction to solve signaling traffic. Target RAS is decided by old data in history cache. When serving RAS receives HO-notification-RSP message to target RAS, target RAS inform to crossover node. And crossover node bicast data packet. If handover is over, target RAS forward data packet. Therefore, It reduces signaling traffics but increase handover success rate. When history cache success, It decrease about 48% total traffic. But When history cache fails, It increase about 6% total traffic

Enhancement of Fast Handover for Mobile IPv6 based on IEEE 802.11 Network (IEEE 802.11 네트워크 기반 Mobile IPv6 Fast Handover 성능 향상 방안)

  • Ryu, Seong-Geun;Mun, Young-Song
    • Journal of KIISE:Information Networking
    • /
    • v.35 no.1
    • /
    • pp.46-55
    • /
    • 2008
  • As a mobility support for IP have studied, Internet Engineering Task Force(IETF) standardized the Mobile IPv6(MIPv6) protocol. When a mobile node moves between subnets, MIPv6 maintains connectivity to network and supports seamless communication, and these processes are called a Handover. Whenever the mobile node moves between subnets, the Handover is performed. The mobile node can not communicate during the Handover. This period is Galled Handover latency. To reduce this latency, mipshop working group standardizes Fast Handovers for Mobile IPv6(FMIPv6), but latency which the mobile node registers its new care-of address to a home agent and a correspondent node is still long. To solve this problem, we propose a scheme that the mobile node registers the new care-of address to the home agent and initiates Return Routability procedure in advance during layer 2 handover, based on FMIPv6 and IEEE 802.11. We analyze MIPv6, FMIPv6 and the proposed scheme in term of packet transmission cost during the Handover. Compared to MIPv6 the proposed scheme gains 79% improvement, while it gains 31% improvement compared to FMIPv6.

Performance Improvement of PFMIPv6 Using Signal Strength Prediction in Mobile Internet Environment (모바일 인터넷 환경에서 신호세기 예측을 이용한 PFMIPv6의 성능 개선)

  • Lee, Jun-Hui;Kim, Hyun-Woo;Choi, Yong-Hoon;Park, Su-Won;Rhee, Seung-Hyong
    • Journal of KIISE:Information Networking
    • /
    • v.37 no.4
    • /
    • pp.284-293
    • /
    • 2010
  • For the successful deployment of Mobile Internet, fast handover technologies are essential. For the past few years several handover mechanisms are suggested, and Fast Handover for Proxy Mobile IPv6 (PFMIPv6) is one of the promising schemes for this purpose. In this paper, we propose a novel L2/L3 cross layer handover scheme based on ARIMA prediction model to apply PFMIPv6 to Mobile Internet environment effectively. Performance gains are evaluated in terms of probabilities of predictive-mode operation, handover latencies, packet loss probabilities, and signaling costs. Three mobilities models are used for our simulation: Manhattan Model, Open Area Model, and Freeway Model. Simulation results show that the proposed scheme can increase probabilities of predictive-mode operation and reduce handover latency, packet loss probabilities, and signaling cost.

Network-based Mobility Control in Mobile LISP Networks (이동 LISP망에서 네트워크 기반 이동성 제어 기법)

  • Choi, Sang-Il;Kim, Ji-In;Koh, Seok-Joo
    • The KIPS Transactions:PartC
    • /
    • v.18C no.5
    • /
    • pp.339-342
    • /
    • 2011
  • This paper proposes a network-based mobility control scheme in wireless/mobile networks, which is based on the Locator-Identifier Separation Protocol (LISP). Compared to the existing LISP mobility scheme, the proposed scheme is featured by the following two points: 1) each LISP Tunnel Router (TR) is implemented at the first-hop access router that mobile nodes are attached to, and 2) for handover support, the LISP Routing Locator (RLOC) update operation is performed between Ingress TR and Egress TR. By numerical analysis, it is shown that the proposed scheme can reduce the handover latency much more than the other candidate schemes.

Network Architecture and Fast Vertical Handover Scheme for UMTS-WLAN Interworking (UMTS-WLAN 간 빠른 수직적 핸드오버 제공을 위한 연동망 모델 및 핸드오버 방식)

  • Kim, In-Cheol;Lee, Sung-Kuen;Kim, Eal-Lae;Park, Jin-Woo
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.32 no.8B
    • /
    • pp.492-501
    • /
    • 2007
  • UMTS-WLAN interworking approach can make the best use of the advantages of both networks by eliminating the stand-alone defects of the two services. For the interworking mechanisms of WLANs and UMTS networks, two major solutions have been proposed, namely loose coupling and tight coupling. The loose coupling approach provides separate data paths for WLAN and UMTS. On the other hand, the tight coupling provides a full integration of the WLAN network and the UMTS core network. The loose coupling has been preferred due to the simplicity and less reconfiguration requirement. However, loose coupling is worse in seamless mobility, QoS provision, and network security. In order to lessen the problems involved in the UMTS-WLAN interworking approaches, we propose a new interworking network architecture and a fast vertical handover scheme by employing Mobility Anchor(MA) for interworking between the two different networks. MA can enable authentication and session initialization before L2 handover of the mobile terminal, so that the seamless and fast vertical handover become possible. Thru analysis and numerical experiments, we proved that the proposed scheme has been validated.

A Handover Mechanism in Internetworking with UMTS/WLAN based on HMIPv6 (HMIPv6 기반의 UMTS/WLAN 연동 네트워크에서의 핸드오버 방안)

  • Jeong Eunjoo;Park Sangjun;Lee Hyewon K.;Kim Jaeha;Kim Byunggi
    • Journal of KIISE:Information Networking
    • /
    • v.32 no.4
    • /
    • pp.508-514
    • /
    • 2005
  • The research in internetworking between UMTS and WLAN, which is completed with merits and demerits, Is actively progressed to establish global roaming environments. This internetworking is classified into two groups: loosely-coupled and tightly-coupled. h tightly-coupled mechanism demands lots of investment and considerable amountof time to construct, which is directly connoted between UNTS and WLAN via IWU. On the other hand, a tersely-coupled mechanism is more scalable and easier to implement than a tightly-coupled one while it has critical drawbacks of packet loss and blocking of services due to handover delay. To alleviate these drawbacks. this work proposes a handover scheme between UMTS and WLAN, which is based on HMIPv6. The performance of the proposed scheme is evaluated by the simaulation. The proposed internetworking scheme based on HMIPv6 shows hotter performance than those based on MIPv6.

Flow-based Seamless Handover Scheme for WLANs Using an Overlaid 4G Network (중첩된 4G망을 이용한 플로우 기반의 끊김없는 WLAN 핸드오버 방안)

  • Choi, Jae-In;Park, In-Soo;Cho, You-Ze
    • KIPS Transactions on Computer and Communication Systems
    • /
    • v.3 no.1
    • /
    • pp.7-14
    • /
    • 2014
  • The rapid increase of mobile devices such as smart phone and smart pad have raised the needs for seamless multimedia services during moving at anytime and anywhere. Current 4G mobile devices are equipped with both 4G (LTE) and WLAN (WiFi) interfaces, and mobile services operators provide wireless Internet services using 4G network with a wider coverage and WiFi zone. Generally users prefer to use the Internet services through WLAN rather than LTE in the coverage of WLAN. However, since WLAN has a long L2 handover latency, it is difficult to support seamless services during a handover. In this paper, we proposed an efficient handover scheme based on flow mobility for WLANs to support a seamless service during handovers by using the overlaid 4G network with a wider coverage. Also, we showed the outperformance of the proposed scheme on a testbed.

On the Handover Performance of a Tri-threshold Bandwidth Reservation CAC Scheme

  • Tung, Hoi Yan;Tsang, Kim Fung;Lee, Lap To;Lam, Ka Lun;Sun, Yu Ting;Kwan, Shiu Keung Ronald;Chan, Sammy
    • ETRI Journal
    • /
    • v.29 no.1
    • /
    • pp.113-115
    • /
    • 2007
  • A dynamic tri-threshold call admission control scheme has been developed. This scheme supports voice, data, and multimedia services and it complies with the universal mobile telecommunications system. The performance of the proposed scheme is evaluated under varying handover rates. The QoS performance-including channel utilization, call dropping probability, and blocking probability-is investigated. The performance of the developed scheme is found to be encouraging.

  • PDF

An Efficient Handover Mechanism Using the General Switch Management Protocol on a Multi-Protocol Label Switching Network

  • Choi, Seong-Gon;Kang, Hyun-Joo;Choi, Jun-Kyun
    • ETRI Journal
    • /
    • v.25 no.5
    • /
    • pp.369-378
    • /
    • 2003
  • Using the general switch management protocol on a multi-protocol label switching network, we present an efficient method for handling handovers. The proposed method directly changes an established path into a new path for supporting a handover. Our investigation reveals the effects of the proposed scheme and demonstrates that this method significantly reduces signaling costs and delays.

  • PDF

QoE Provisioning for Handovers in Mobile communication Networks

  • Lee, Jong-Chan;Lee, Moon-Ho
    • Journal of the Korea Society of Computer and Information
    • /
    • v.22 no.8
    • /
    • pp.25-32
    • /
    • 2017
  • In this paper we propose a resource management method which enables to guarantee the quality of experience (QoE) for handover in the overlaid macro-femtocell networks. How to cope with the resource demand of handover calls is necessary to efficiently support the movement of mobile terminals, the QoE degradation or the load control. We attempt to satisfy the QoE requirements of users and maximize the capacity of the system at the same time. In order to achieve this goal, this scheme divides the shared resources into two part for the movement of MT and QoE degradation, and allocates those resources with the competition between four types of handovers. Simulation results show that our scheme provides better performances than the conventional one with respect to the outage probability, data transmission throughput.