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Mobile IP

Mobile IP. Evolution of Data Services. GPRS. GSM. Circuit Switched Data Today. Packet Data for GSM. Mobile IP. CDMA. Packet Switching For Data Built-in. Other Cellular. Some AMPS and Non-AMPS Cellular Systems Have Packet Ability Today.

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Mobile IP

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  1. Mobile IP

  2. Evolution of Data Services GPRS GSM Circuit Switched Data Today Packet Data for GSM Mobile IP CDMA Packet Switching For Data Built-in Other Cellular Some AMPS and Non-AMPS Cellular Systems Have Packet Ability Today Cellular Systems Are Moving Toward Support for Packet Data This Is the Foundation for Mobile IP

  3. CIP and MIP • Cellular IP • Draft for providing network access to mobile users within a small area (BS handover between a few cells) • Mobile IP • Macro mobility between CIP LANs and other NWs

  4. MIP Requirements • Mobile host must be able to change his LL attachement point without changing IP address and data loss • Mobile host must be able to communicate with any other host in external networks • No enhancements and changes to IP protocol • Mobility messages transmitted over the NW must be encrypted

  5. MIP Functionality • Two new nodes are introduced • HA – home agent • FA – foreign agent • MS currently not located in its home NW is serviced by FA • FA takes care of all mobile users visiting the foreign NW • FA notifies HA that MS is now reachable under FA’s c/o (care of) address • All date sent to MS will be routed to home NW where HA • takes care of data packets • Does IP encapsulation • Routes them to c/o address • Data from MS are directly forwarded to his home NW

  6. Mobile IP Is the Solution for Wireless Connectivity • Transparent interoperability with all other hosts • Mobile always reachable at the same IP address • Only the home agent needs to know the mobile’s location • All other routers do normal forwarding

  7. Mobile IP • The IETF proposed standard solution for mobility at Layer 3 • RFCs 2002–2006 define the functionality • Protocol works over any intermediate media • Movement is transparent to hosts who communicate with the mobile user • No IP address changes are needed to allow mobility

  8. Mobile IP forms a layer 3 tunnel From Home Agent (HA) To the Mobile Node (MN) HA can continue to use its home address to receive IP Datagrams Overview: MobileIP Functionality ISP Internet HA MN

  9. 10.31.2.1 MN MN Mobile IP When the new Registration is received, a new COA is installed in the HA RFC 2002 Mobility Binding Table: MN CoA 1.1.1.3 10.31.1.1 1.1.1.7 10.31.1.1 1.1.1.8 10.31.2.1 1.1.1.5 10.31.3.1 FA MN FA 10.31.3.1 No Change Is Propagated to Correspondents 10.31.2.1 HA FA New Data Path Old Data Path 10.31.1.1 The Movement Is Transparent to all Other Devices

  10. MIP Routing • No optimized routing (roundabout route over HA) • Inefficient tunnel from HA to FA (IP encapsulated in IP) • Can be optimized with minimal encapsulation (RFCs 2003 and 2004) • Can be implemented on top of existing GPRS mobility management • Use GGSN as FA • Router at home NW serves as HA

  11. VLR HLR AUC EIR MSC BSC MSC BSC A Look Ahead for Cellular & PCSBackbone Transition From Circuit to Packet • Packet network supports all backbone & backhaul • BSC becomes a service element in the network • MSC services begin to distribute to service elements BTS Completed packet network backbone BTS Backbone

  12. Expected Market Evolution - common IP infrastructure for 2G & 3G - high speed data / multimedia services - no MSC - innovative services everywhere - Packet BTS - Packet gateways - PSTN and toll bypass - Feature servers - GPRS - CDMA data - Mobile IP

  13. Low cost IP packet backhaul Reduced recurring costs Better bandwidth efficiency Positioned for 3G Network Migration 1 B S C M S C B T S P a c k e t B T S BTS Packet Backhaul GPRS P S T N IP P a c k e t s B T S B a c k h a u l

  14. Minimize MSC dependence VoIP Offload traffic PSTN/Toll Bypass services Data Services Network Migration 2 B S M S C Circuit/Packet Gateways Circuit/Packet Gateways P S T N C IP I n t e r n e t P a c k e t P a c k e t B T S N e t w o r k 2 G V o i c e / d a t a

  15. Enhanced Services Feature servers APIs for 3rd parties Rapid service delivery Network Migration 3 Circuit/Packet Gateways Service Gateways

  16. P S T N C i r c u i t G a t e w a y s I n t e g r a t e d B T S I P N e t w o r k S e r v i c e G a t e w a y s I n t e r n e t I n t e g r a t e d B T S Peer-to-Peer C a l l C o n t r o l F e a t u r e S e r v e r s 3 r d P a r y A p p s .

  17. PSTN VLR VLR HLR HLR AUC AUC EIR EIR Service Element Service Element Service Element MSC MSC BSC MSC BSC New World VisionATM-IP Enabled Infrastructure Today’s Wireless Voice Network “New World” Wireless Infrastructure ATM/IP Backhaul ATM/IP BTS Internet BTS Backbone Complete packet network for backhaul and backbone

  18. Questions ???

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