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