xcast update yuji - ug- imai ([email protected]) nobuo kawaguchi ([email protected]) eiichi...
TRANSCRIPT
XCAST update
Yuji -UG- IMAI ([email protected])
Nobuo Kawaguchi ([email protected])
Eiichi MURAMOTO ([email protected])
WIDE XCAST WG / XCAST fan club Japan
SOI-ASIA/AI3 meeting 2006 Spring
TOC
• What’s XCAST, again.• XCAST-ready sites in AI3
1. Research and development in Japan
2. Preparing IRTF-RG (@ IETF65)
3. Deployment activity • Video made by Nagoya university
What is XCAST (again)
SFC
USMAIT
Internet
What XCAST (eXplicit Multi-Unicast) is. Instead of a group address, an explicit list of
unicast destination addresses is stored in an optional IPv6 routing header.
IPv6 headerSRC=SFCDST=AIT
Hop-by-Hop header
ROUTING header[AIT, USM, ITB]
[ 1 , 1 , 0 ]
UDPheader
IPv6 headerSRC=SFC
DST=XCAST.
ITB
Advantages XCAST can be delivered using only
unicast routing information. No need for
a multicast specific routing protocol maintaining multicast status on intermediate
routers group address allocation sender location advertisement
Unlimited Scalability with respect to the number of groups
XCAST is ready AIT
Settled XCAST router and XCAST terminal Tsuchimoto could connect to Japan by XCAST Via native IPv6 22 Mar 2006
USM Settled XCAST terminal Simon [email protected] did it Via IPv6 over IPv4 tunnel 09 Jun 2005
Research and development in Japan
Group Management XGMS:
Extensible Group Management System Tocuchi, Obara, Suzuki of Waseda university Added subscribe / notify function to MVC2 model (ruby on rails)
To make it Easy to extent group system application like Adding agreement (voting) button function Adding Instant message function
Implementation was demonstrated At WIDE spring camp in 2006
SICC ( Sender Initiated Congestion Control ) Feature ( SICC is intended to provide)
TCP Fairness Fast Congestion Avoidance Intra Session Fairness ( not limited by slowest receiver )
Method Multiple predefined CBR associated with a different XCAST6 group containing receivers with
similar acceptable sending rates. The acceptable sending rate of each receiver is estimated at the sender using TCP-friendly Rate
Control (TFRC:RFC3448) in response to feedback generated by the receiver. Progress
Panasonic implemented SICC on XCAST6 and installed on the prototype of Network camera , Linux 2.6.10+xcast6-patch, windows viewer under X2U router.
Internet Conference 2005 ( http://www.internetconference.org/ic2005/ ) Demonstration in WIDE sping camp on 2006
Future plan Field experiment on AI3 network in Autumn 2006 (not approved yet, though)
IP v6 internetPHS128kbps
FTTH 100Mbps
1Mbps
128kbps
18 fps
18 fps
2 fps
Hotspot 11Mbps
Contact: [email protected], Takahiro Yoneda, Eiichi Muramoto, Kazunobu Konishi
Preparing IRTF-RG(Internet Research Task Force)
Keeping in touch with Aaron Falk (IRTF chair)
We had the unofficial meeting at IETF 65 http://www.net.itc.nagoya-u.ac.jp/SSGM/
Current draft charter Candidate co-Chair (TBD)
Jeremy of MIT, et al Research target
Unsolved problems (by IP multicast) To investigate existing approaches, ALM, overlay multicast
A key design consideration is the tradeoff of placement of multicast state in the network versus in the packets (xcast)
Adaptation schemes which consider factors including group size, group membership dynamics, delay sensitivity, date rate, single vs many sources, QoS, dynamics of network topology, and other application-specific parameters.
Multicasting in MANET (may be) Membership
Open manner (ML, online meeting, F2F) Status
Aaron are reviewing it before he will post it to IAB.
Deployment activity Please watch the video
made by Nagoya university