Proxy Mobile IPv6 (PMIPv6)

Transcription

1 Sungkyunkwan University Proxy Mobile IPv6 (PMIPv6) - Grand ICT 연구센터지원사업라이프컴패니온쉽경험을위한지능형인터랙션융합연구 - 무선포함접속방식에독립적인차세대네트워킹기술개발 SDN/NFV 기반의기업유무선통합네트워크를위한액세스기술독립적오픈소스컨트롤러개발 - 자율제어네트워킹및자율관리핵심기술개발생체모방자율제어시스템및자율관리 / 통합플랫폼구축 - 첨단인터랙션을위한기반 SW 융합기술연구인간과기기, 기기와기기간의첨단인터랙션을위한융합 SW 중심의기반 SW 개발 Copyright Networking Laboratory

2 Contents Overview Network-Based Mobility Management Mobile Node Attachment Handover Procedure MIPv6 vs. PMIPv6 Load Balancing in PMIPv6 Proxy Mobile IPv6 Networking Laboratory 2/24

3 Proxy Mobile IPv6 Overview (1/2) A promising solution direction for handovers in future wireless networks is to give control of the handover process to the network (on behalf of the mobile node) In this way the network can coordinate the entire handover process, making the most optimal decisions at the most optimal time, by using all information available (Host-based Mobility) (Network-based Mobility) Proxy Mobile IPv6 Networking Laboratory 3/24

4 Proxy Mobile IPv6 Overview (2/2) In PMIPv6, IP-level mobility is hidden from the mobile node (MN) It is the Mobile Access Gateway (MAG) that detects and signals movement of the MN to the Local Mobility Anchor (LMA), which is the topological anchor point of the MN s address MAG1 IP tunnel IP-in-IP tunnel between LMA and MAG NETLMM domain (network-based localized mobility management domain) LMA Home network MN s home network (topological anchor point) LMA address (LMAA) That will be the tunnel entry point Proxy Binding Update (PBU) The control message sent by MAG to LMA to establish a binding between MN-HoA and Proxy-CoA Movement MAG2 Proxy Binding Acknowledge (PBA) The control message sent by LMA to MAG MN s home address (MN-HoA) MN continues to use it as long as it roams within the same domain MN Proxy care-of address (Proxy-CoA) The address of MAG. This will be the tunnel end point LMA: Local Mobility Anchor MAG: Mobile Access Gateway Proxy Mobile IPv6 Networking Laboratory 4/24

5 Network-Based Mobility Management (1/2) An MN is managed by the mobility entities such as Mobile Access Gateway (MAG) and Local Mobility Anchor (LMA) The LMA acts as the Home Agent (HA), which manages the MN s binding state and home network prefix (Anchor Point) The main task of MAG is to send a Proxy Binding Update (PBU) message on behalf of an MN whenever the MN hands off within a localized mobility domain (LMD) managed by the LMA An MN can send and receive data with its Home Address (MN-HoA) even if the MN hands off across different networks in the local mobility domain Proxy Mobile IPv6 Networking Laboratory 5/24

6 Network-Based Mobility Management (2/2) Mobility Signaling in PMIPv6 6 Profile 5 AAA query AAA Server 2 AAA query with MN-ID 4 PBU 3 Profile LMA/HA MAG 1 7 PBA MN s home address (MN-HoA) MN continues to use it as long as it roams within the same domain MAG 2 NETLMM domain (NETwork-based Localized Mobility Management domain) LMA: Local Mobility Anchor MAG: Mobile Access Gateway AAA: Authentication, Authorization and Accounting Proxy Mobile IPv6 Networking Laboratory 6/24

7 Mobile Node Attachment (1/4) Message Flow 1 MN Attachment 2 AAA query with MN-ID 3 AAA reply with profile 4 PBU with MN-ID 5 AAA query with MN-ID 6 AAA reply 7 PBA with MN-ID, Home network prefix option Home Network Prefix Router Advertisement Data packets Tunneling Tunneled data packets Data packets Proxy Mobile IPv6 Networking Laboratory 7/24

8 Mobile Node Attachment (2/4) Steps 1 and 2: When an MN first attaches to an access network connected to the MAG, the access authentication procedure is performed using an MN s identity (i.e., MN-Identifier) via the deployed access security protocols on the access network Step 3: After successful access authentication, the MAG obtains the MN s profile, which contains the MN-Identifier, LMA address, supported address configuration mode, and so on from the policy stored (e.g., authentication, authorization, and accounting - AAA server) Proxy Mobile IPv6 Networking Laboratory 8/24

9 Mobile Node Attachment (3/4) Step 4: Then the MAG sends a Proxy Binding Update (PBU) message including the MN Identifier to the MN s LMA on behalf of the MN Steps 5 and 6: Once the LMA receives the PBU message, it checks the policy store to ensure that the sender is authorized to send the PBU message. If the sender is a trusted MAG, the LMA accepts the PBU message Step 7: Then the LMA sends a Proxy Binding Acknowledgment (PBA) message including the MN s Home Network Prefix (HNP) option, and sets up a route for the MN s home network prefix over the tunnel to the MAG Proxy Mobile IPv6 Networking Laboratory 9/24

10 Mobile Node Attachment (4/4) The MAG establishes a tunnel with the LMA for packet transmission The MAG then sends Router Advertisement (RA) messages to the MN on the access link to advertise the MN-HNP When the MN receives these RA messages, the MN configures the IP address using either a stateless or stateful (with DHCP support) address configuration modes After successfully completing the address configuration procedure, the MN uses this address for packet delivery Proxy Mobile IPv6 Networking Laboratory 10/24

11 Handover Procedure (1/4) Message Flow MN Detached 3 MN Attachment 1 DeReg PBU 2 PBA 4 AAA query with MN-ID Home Network Prefix 8 Router Advertisement 5 AAA reply with profile 6 PBU 7 PBA Tunneling Data Packets Data Packets Data Packets Proxy Mobile IPv6 Networking Laboratory 11/24

12 Handover Procedure (2/4) Step 1: When MAG1 detects the detachment of an MN, it will sends a DeReg PBU (DeRegistration PBU) message to the LMA and remove the binding and routing state for that MN Step 2: The LMA sends a PBA message to MAG and waits for a certain amount of time, before it deletes the MN s BCE (Binding Cache Entry) Step 3: MAG2 detects the attachment of MN Proxy Mobile IPv6 Networking Laboratory 12/24

13 Handover Procedure (3/4) Steps 4 and 5 : Upon detecting the MN on its access link, the MAG2 will perform the access authentication procedures Steps 6 and 7: To update the LMA about the current location of the MN, MAG2 sends a PBU message to the MN s LMA on behalf of the MN Proxy Mobile IPv6 Networking Laboratory 13/24

14 Handover Procedure (4/4) Step 8: After completion of the signaling, the MAG2 will send the Router Advertisements (RA) containing the MN s home network prefix, and this will ensure the MN will not detect any change with respect to the layer-3 attachment of its interface Upon receiving the RA message, the MN believes it is still on the home link Proxy Mobile IPv6 Networking Laboratory 14/24

15 Buffering in Proxy Mobile IPv6 Video Content A comparison between handover procedures of standard PMIPv6 and buffering-based PMIPv6. Proxy Mobile IPv6 Networking Laboratory 15/24

16 Buffering in Proxy Mobile IPv6 Proxy Mobile IPv6 Networking Laboratory 16/24

17 MIPv6 vs. PMIPv6 (1/2) No Mobility-related Signaling No DAD during Handover Reduced Tunneling Overhead Proxy Mobile IPv6 Networking Laboratory 17/24

18 MIPv6 vs. PMIPv6 (2/2) Proxy Mobile IPv6 Networking Laboratory 18/24

19 Practice Problems What is the Care of Address (CoA) in MIPv6? What is the role of CoA? What replaces CoA in PMIPv6? Proxy Mobile IPv6 Networking Laboratory 19/24

20 Load Balancing in PMIPv6 (1/2) Load Issue in PMIPv6 The load status of LMA, the topological anchor point of MNs, is critical since LMA processes all the packets MNs transmit and receive To avoid overloading of an LMA, there can be multiple local mobility anchors in a Proxy Mobile IPv6 domain each serving a different group of mobile nodes In this environment, efficient load balancing of LMAs is an important issue. It is because although there are multiple LMAs, the load may concentrate to a specific LMA, which results in longer queuing delay of LMA and increased packet loss Using an existing Authentication, Authorization and Accounting (AAA) server, even distribution of LMA loads is achieved Proxy Mobile IPv6 Networking Laboratory 20/24

21 Reactive Mode Proactive Mode Load Balancing in PMIPv6 (2/2) MN MAG AAA Server plma nlma CN (1) Rtr solicitation (8) Rtr advertisement Data Packets (2) AAA Query (3) AAA Reply (MN Profile, LMAA) (4) PBU (5) AAA Query (6) AAA Reply (7) PBA Tunneled Data Packets Data Packets (9) LMAA Query (10) LMAA Reply (LMAA) Load of plma exceeds its threshold (13) LMA_HO_Init (14) LMA_HO_Init Ack (11) MN Context Transfer (12) Transfer Ack Data Packets Tunneled Data Packets Data Packets Proxy Mobile IPv6 Networking Laboratory 21/24

22 Publications An Efficient Load Balancing of Mobile Access Gateways in Proxy Mobile IPv6 Domains International Conference on Computational Science and Its Applications (ICCSA), pp , March 2010 Low Latency Handover Scheme Based on Optical Buffering at LMA in Proxy MIPv6 Networks Springer-Verlag Lecture Motes in Computer Science, vol. 5593, pp , July 2009 Route Optimization Using Scalable Cache Management for Intra-NEMO Communication Springer-Verlag Lecture Notes in Computer Science, vol. 4611, pp , July 2007 Reduction of Signaling Cost and Handoff Latency with VMAPs in HMIPv6 Springer-Verlag Lecture Notes in Computer Science, vol. 4325, pp , November 2006 Forwarding Scheme Extension for Fast and Secure Handoff in Hierarchical MIPv6 Springer-Verlag Lecture Notes in Computer Science, vol. 3515, pp , May 2005 Efficient Location Traffic Management with Multiple Virtual Layers Journal of Information Science and Engineering, Vol. 19, No.5, pp , Sept, Proxy Mobile IPv6 Networking Laboratory 22/24

23 References (1/2) D. Johnson, C. Perkins, and J. Arkko, Mobility Support in IPv6, IETF RFC 3775, June S. Gundavelli, K. Leung, V. Devarapalli, K. Chowdfury, and B. Patil, Proxy Mobile IPv6, IETF RFC 5213, August H. Soliman, C. Castelluccia, K. El Malki, and L. Bellier, Hierarchical Mobile IPv6 Mobility Management (HMIPv6), IETF RFC 4140, August R. Droms, Ed., J. Bound, B. Volz, T. Lemon, C. Perkins, and M. Carney, Dynamic Host Configuration Protocol for IPv6 (DHCPv6), IETF RFC 3315, July J. Kempf Ed., Problem Statement for Network-Based Localized Mobility Management (NETLMM), IETF RFC 4830, April J. Kempf Ed., Goals for Network-Based Localized Mobility Management (NETLMM), IETF RFC 4831, April Ki-Sik Kong, Youn-Hee Han, Myung-Ki Shin, HeungRyeol Yoo, and Wonjun Lee, Mobility management for All-IP Mobile Networks: Mobile IPv6 vs. Proxy Mobile IPv6, IEEE Wireless Communications, April Yong Li, Haibo Su, Li Su, Depeng Jin, Lieguang Zeng, A Comprehensive Performance Evaluation of PMIPv6 over IP-based Cellular Networks, Vehicular Technology Conference, Spring Proxy Mobile IPv6 Networking Laboratory 23/24

24 References (2/2) N. Neumann, X. Fu, J.Lei, and G. Zhang, Inter-Domain Handover and Data Forwarding between Proxy Mobile IPv6 Domains, draft-neumann-netlmm-inter-domain-02, March G. Giaretta, Ed., Interactions between PMIPv6 and MIPv6: scenarios and related issues, draft-ietf-netlmm-mip-interactions-04, June Jong-Hyouk Lee, Tai-Myoung Chung, Sangheon Pack, and Sri Gundavelli, Shall We Apply Paging Technologies to Proxy Mobile IPv6?, MobiArch 08, August G. Heijenk, M. Bargh, J. Laganier, and A. Prasad, Reducing Handover Latency in Future IPbased Wireless Networks: Fast Proxy Mobile IPv6, Second ERCIM workshop on emobility, May Mun-Suk Kim, and SuKyoung Lee, A Novel Load Balancing Scheme for PMIPv6-based Wireless Networks, AEU International Journal of Electronics and Communications, May Dizhi Zhou, Hanwen Zhang, Zhijun Xu, Yujun Zhang, "Evaluation of Fast PMIPv6 and Transient Binding PMIPv6 in vertical handover environment," International Conference on Communications, May Soochang Park, Euisin Lee, Fucai Yu, Sungkee Noh, and Sang-Ha Kim, "Inter-domain Roaming Mechanism Transparent to IPv6-Node among PMIPv6 Networks," Vehicular Technology Conference, May Proxy Mobile IPv6 Networking Laboratory 24/24