Implementing Mobile IP in Glomosim 2.0 Sungwook Lee Eric Lin Tutor : S. Kyle Bae Winter01 CS215

Goals Implementing Mobile IP in Glomosim 2.0 Mobile IP in a hybrid network with wired and wireless, e.g cellular network Supporting Handoff Hybrid model between Mobile IP and Cellular IP

Overview of Mobile IP Proposed by Charles Perkins in 1996 Mobile IP provides a mobile host (MH) with connectivity to Internet with the same IP address while moving around Home Agent (HA) handles MH registration and packet forwarding for it Foreign Agent (FA) provides a care-of-address for its visiting MHs and decapsulates packets and forward them to its vistors

Mobile IP Registration –MH registers with FA –FA informs MH’s HA about MH’s registration –HA sends confirmation to FA –HA starts interception and tunneling of packets for MH Interception and tunneling –HA looks up a table containing currently away MHs –HA encapsulates packet within another IP packet –Encapsulated packets are tunneled to FA and decapsulated

Cellular Network Topology

Simple Handoff time Advt from New Agent Advt from Current Agent reset Start handoff Handoff threshold

Simple Handoff Example

Implementing Mobile IP Add Mobile IP sublayer typedef struct { unsigned int agent:1, mobileHost:1, reserved:2, state:8, handoffThreshold:8, maxMobileHost:16; HomeAgentInfo homeAgentInfo; ForeignAgentInfo foreignAgentInfo; MobileHostInfo mobileHostInfo; NetworkMobileIpStatsType stats; } GlomoMobileIp; Add Mobile IP protocol // include/nwcommon.h : onf of protocol numbers for IP // Ref : rfc 1700 #define IPPROTO_MOBILE_IP_CONTROL 4 #define IPPROTO_MOBILE_IP_IPIP 94

Implementing Mobile IP (Cont.) MH AT HOME MH INIT MH AWAY MH TXMITTING MH IDLE MH TXMITTING MH IDLE MH IN HANDOFF

Simulation Parameters 22 Base stations 44 Mobile hosts 2000 m x 2000 m Simulation time : 10 min Traffic : 20 CBRs, 20 TELNETs or 20 FTPs Random mobile host movement using mobility.trace Moving speed : 0, 5, 10, 15, 20, 25, 30(m/s)

Mobile IP Parameters Mobile IP Agent broadcasts advertisement every 300 ms Routing table in agent is updated if the agent can’t hear mobile host during 30 second

Simulation Scenarios Mobility20 FTPs20 TELNETs20 CBRs 0 m/s3 run 5 m/s3 run 10 m/s3 run 15 m/s3 run 20 m/s3 run 25 m/s3 run 30 m/s3 run

Simulation Topology

Simulation Snapshot

Simulation Result : Handoff vs Mobility

Simulation Result : Packet drop vs Mobility

Simulation Result : Encapsulated packet vs Mobility

Simulation Result : Decapsulated packet vs Mobility

Simulation Result : Tunneled packet vs Mobility

Conclusion Mobile IP implemented in Glomosim 2.0 Handoff included in Mobile IP for the Cellular network environments Packet drop rates and handoff counts are measured Future work –Relation of advertisement interval, handoff scheme, mobility model(mobile host speed) and routing table update interval –Extend to Cellular IP

Acknowledgement S. Kyle Bae Yunjung Yi