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MSOCKS : An Architecture for Transport Layer Mobility

MSOCKS : An Architecture for Transport Layer Mobility. David A. Maltz, Pravin Bhagwat IEEE INFOCOM 1998. Presented by Chiou-Jiun-Chao 2006/10/04. Outline. Introduction MSOCKS Performance Conclusion. Introduction.

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MSOCKS : An Architecture for Transport Layer Mobility

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  1. MSOCKS : An Architecture for Transport Layer Mobility David A. Maltz, Pravin Bhagwat IEEE INFOCOM 1998 Presented by Chiou-Jiun-Chao 2006/10/04

  2. Outline • Introduction • MSOCKS • Performance • Conclusion

  3. Introduction • A flexible system that mobile nodes can continue connections between different interfaces.

  4. MSOCKS architecture • A proxy provides “TCP Splice” • A MSOCKS library in mobile node

  5. MSOCKS • MSOCK library • It intercepts calls made by application to networking functions such as connect(), send(), … • Send out RECONNECT request • Maintain variables: • Data_read • Date_written

  6. Proxy • Splice connections • Specify each connection with one “identifier”. • Identifier = one proxy port number. • Mapping SeqNum. between two connections. • Alter IP and TCP headers • Choose the “Basepint” • The first byte of new connection.

  7. Basepoint choosen. • Server  client flow : Read is slower

  8. Server  Client : Read is faster

  9. Client  Server :

  10. Performance

  11. Conclusion • MSOCKS provides applications with different control over their sessions.

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