以SCTP通讯协定实作之无间断网换之

1、SCTP A Study of Muti-homes Seamless Roaming Protocol by using SCTP Jia-Ning Luo Shih-Ting Chen Chia-Cheng YaoTyng-Tyng Guu Yueh-Wen WangYa-Chau HuangDepartment of Information and Telecommunications Engineering,Ming Chuan UniversitySCTP (Stream Control Transmission Protocol) TCP/IP SCTP TCP/IP SCTP T

2、CP/IP IP IP SCTP, TCP/IPAbstractThe main topic of our research is SCTP. i.e. Stream Control Transmission Protocol. Nowadays, network actually is a must and become a very important part in our daily lives. We also believe in that it will be largely used in future and the application surly will be wid

3、ely more than ever. Finally, TCP/IP should be extremely examined because of its limitation on design. Therefore, we spent a lot of times to study how SCTP can get improve and make up shortage of TCP/IP Protocol. SCTP is a whole new protocol and has not been yet used in many ways at this stage. Howev

4、er, SCTP not only keeps the advantages of TCP/IP but also create new support. Most of all, a key point of many characteristics is to allow user owns several IP at same time and you can switch to any other available IP immediately in case route is discontinued.No mater files transmission or videoconf

5、erencing, there is no need to worry about interruption happened. Thus, the application of SCTP will get more popular and improve our network become stable, meanwhile, reduce any unnecessary loss by suddenly interruption of network.Keywords: SCTP, TCP/IP1. Internet PDA 2G/3G TCP/IP TCP/IP TCP/IP IP (

6、 Multi-Homed Network) TCP/IP TCP/IP (Stream Control Transmission Protocol; SCTP) 1 SCTP (Endpoint) (association) SCTP (Seamless Handover) SCTP TCP/IP SCTP TCP/IP (seamless handover):Linux 2. SCTP TCP/IP SCTP (Seamless Handover) 2.1 TCP/IPTCP/IP Transmission Control Protocol (TCP) 2 Internet Protocol

7、 (IP) IETF Internet WWW E-Mail FTP TelnetTCP IP TCP IP (Acknowledgement) TCP 2.2 SCTP SCTP (Stream Control Transmission Protocol) IETF 3, 4 SCTP TCP UDP5 (Multi-homed network) 6 SCTP (Transmission Path) (Primary Path) (Secondary Path) SCTP 72-1 SCTP 2.3 (Seamless Handover Algorithm) 8 SCTP SCTP SCTP

8、 2-2 SCTP MN (Mobile Node) CN (Correspondent Node) MN IP 1 IP 2 SCTP MN Access Router A Access Router B 9Access Router B MN MN Access Router B IP 1MN Access Router A MN MN CN IP 1 CNCN MN MN IP 1 CN MN IP 1SCTP MN MN Router Router MN Router MN Router IP Router MN IPRouter IP Router MN IP Router IP C

9、N IP 2.4 Linux Kernel SCTPLinux Unix-like (kernel) Linux Linux Linux SCTP SCTP Linux Kernel 103. Linux SCTPSCTP Linux TFTP SCTP SCTP TCP TFTP TCP SCTP TFTP Ethereal SCTP (100Mbps) 100 Mbps 10 Mbps 3.1 SCTP SCTP Linux SCTP S C Server Client Server S1 S2 Client C1 C2 100Mbps HUB Internet 3-1 Client C1

10、 Server S1 TFTP Client C1 SCTP C1 C2 S1Server S1 SCTP C2 S2 C1 SCTP C1 C2 S2 S1 SCTP S1 S2 100Mbps 400MB 5 Ethereal 3-2 SCTP C1 C2 C1 C1 C2 400MB Ethereal Server C1 C2 3-3 5 5 C1 S1 5s C2 S1 S2 C1 S2 S1 C1 3-4 50 50 C1 (Congestion Control) SCTP C1 SCTP 3.2 ( Server ) SCTP IP (100Mbps/10Mbps) Server

11、(100Mbps/10Mbps) ServerS C Server Client IP Server S1 S2 Client C1 C2 3-5 ( Server ) Client C1 Server S1 TFTP Client C1 SCTP C1 C2 S1 C1 SCTP C1 C2 S1Server S1 100Mbps Client C1 100Mbps Client C2 10Mbps 400MB 50 Ethereal 3-6 ( Server ) SCTP C1 C2 C1 C1 C2 Ethereal Server C1 C2 3-7 50 C2 50 C1 C1 S1

12、50 Client C1 C2 Y C1 S1 C2 S1 3.3 ( Server ) SCTP Server SCTP S C Server Client Server S1 S2 Client C1 C2 100Mbps 10Mbps HUB Internet 3-8 ( Server ) Client C1 Server S1 TFTP Client C1 SCTP C1 C2 S1Server S1 SCTP C2 S2 C1 SCTP C1 C2 S2 S1 SCTP S1 S2 100Mbps 10Mbps 400MB Ethereal 3-9 ( Server ) SCTP C

13、1 C2 C1 C1 C2 Ethereal Server C1 C2 3-10 50 C2 50 C1 100Mbps 50 C2 S1 S2 10Mbps C1 S2 S1 , 4.4.1 100Mbps SCTP Multi-homed network 4.2 ( Server ) SCTP : 5 C1 C2 (Congestion Control) 4.3 ( Server ) SCTP :Server 5 C1 C2 (Congestion Control) 5.SCTP LINUX TFTP SCTP TCP/IP TCP/IP SCTP TCP/IP SCTP TCP/IP SCTP TCP/IP SCTP SCTP TCP/IP 3 Iyengar, J., et al., Concurrent Multipath Transfer Using SCTP Multihoming. SPECTS 2004.4 Kashihara, S., et al., Multi-Path Transmission Algorithm for