fast-handover wlan testbed in yrp for mobile internetworking masaki hirabaru (nict) january 24, 2006...
TRANSCRIPT
Fast-Handover WLAN Testbed in YRP for Mobile Internetworking
Masaki Hirabaru (NICT)
January 24, 2006Network Engineering Workshop
21st APAN Meeting in Tokyo
NICT KoganeiNICT YokosukaROOT, Inc.Keio Univ. Teraoka Lab.Tokyo Inst. Tech. Ohta Lab.Univ. of Tokyo Morikawa Lab.Chikushi Jogakuen U.Kyoto Univ. Fujikawa Lab.ASTEM….
SIMPLE Project Members
SIMPLESIMPLEMobile Internet ArchitectureMobile Internet Architecture
M-ISP A M-ISP B M-ISP C
The Internet
APsch
an
ne
l #1
cha
nn
el #
2
cha
nn
el #
3
cha
nn
el #
N
…
User a, b, c
User a, b, c
WideSharedChannel 1
PDMA (Packet Division Multiple Access) Broadband No Frequency Allocation Issue
The Internet
M-ISP Installs APs with Fiber/ADSL from ISPM-ISP owns APs only
APs
Static allocation+ CDMA
CDMA only
PFI Poles
JGN2JGN2
APANAPAN InternetInternet
7F PFI Rack
YRP #1 Bldg.
*PFI: Private Finance Initiative by Keihin Electric Express Railway Co., Ltd.
3F
2F
1F
MNRack
MIRAI
SMP
CADSMR
YRP #1 Bldg.(NICT Yokosuka)
JGN II AP
Juniper M10
Mobile Network Lab Point-to-Point Optical Fibers
Tokyo XP
Univ. of Tokyo
SIMPLE YRP (Yokosuka Research Park) Testbed
Other partner Institutions
NICT Koganei
HA AUTH
HA
AUTH
temporaryInstallation
MA
WIDE
Pole Distance: 70-150 mTotal Run: ~1KmAntenna: 8 dBi CollinearFrequency: 5050, 5070 Mhz (center) Bandwidth: 36MhzTransmit Power: 28 mW
Two Research Approaches in SIMPLETwo Research Approaches in SIMPLE
802.11
L3 DrivenH/O
LIN6(IPv6)
802.11w/o MGM
MBA MISP
MBAMobile IP
(IPv4)
Intel-based Wireless Router with Atheros Chip
MBBH/O
802.11 MGM
FreeBSD NetBSD
Internet Applications
*MBA (Mobile Broadband Association, http://www.mbassoc.org)
No Channel ScanSimultaneous Associations
ChannelScan
Make-before-Break Handover MechanismMake-before-Break Handover Mechanism
A
ChannelScan
B
Disruption = Packet LossMinimize the gap
A B
A
B
Overlap (Make-before-Break)
TR1
MN
TR2
Traditional (IETF) Dual Transceivers PDMA
A B
Overlap (Make-before-Break)
TRTR
Antenna
Authentication Server
Home Agent
PC VoIP
Mobile router
AP1 (router)
AP2 (router) AP11 (router)
The Internet
camera
The same channel (PDMA)
Handover
…
Authentication IP address
Subnet 1 Subnet 2 Subnet 3
YRP (Yokosuka Research Park) Testbed Field Trial
Mapping Agent
DVTS Transfer from Vehicle to Office (Half Rate ~15 M bps)
UDP Data Transfer from Vehicle to Office (58 Bytes, 1000 Packets / sec, ~1 M bps)
No packet loss
Mobile to Mobile Transmission Experiment over APAN
Future Plan