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Research Activities on Broadband Mobile Research Activities on Broadband Mobile and Wireless Communications in the Center and Wireless Communications in the Center of Excellence Program at Keio University of Excellence Program at Keio

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  • Prof. Iwao Sasase, Keio University

Research Activities on Broadband Mobile Research Activities on Broadband Mobile and Wireless Communications in the Center and Wireless Communications in the Center

  • f Excellence Program at Keio University
  • f Excellence Program at Keio University

Iwao Sasase, Keio University

http://www.sasase.ics.keio.ac.jp Email sasase@ics.keio.ac.jp

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  • Prof. Iwao Sasase, Keio University

Yagami Campus, Keio University, Yokohama Japan

http://www.keio.ac.jp/index-en.html

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  • Prof. Iwao Sasase, Keio University

Ｋ

２Campus, Keio University

Kawasaki, Japan

http://www.k2.keio.ac.jp/index.htm

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  • Prof. Iwao Sasase, Keio University

Paradigm Shift in Networking

Connection Type

Distributed Computing Multi Modal Always-on IP Connection Dial up

Connection Model IP Nomadic Mobile Internet Wireless LAN Ubiquitous Network Broadband & Wireless Seamless Services Fixed Client-Server

2001 2005

Server-Centric Peer-to-Peer (Person) P-to-P (Everything)

Service Driven Mobile Driven Web Driven

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  • Prof. Iwao Sasase, Keio University

What is Ubiquitous Network ?

Ubiquitous: Omnipresence 【 Latin】

・ Computing Everywhere ・ Content Everywhere ・ Connectivity Everywhere

① Seamless Connection and Service ② Location, Context & Preference-Aware Service

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  • Prof. Iwao Sasase, Keio University

Is Japan Strong in Ubiquitous Era？

The Ubiquitous Field Holds the Key to the Japanese Economy’s Revival. Keio University Takes the Leadership to Push the Frontier of Broadband Mobile and Wireless Communications in Ubiquitous Network Society. Hardware & Software (OS， Applications) Network Technology Applications Cellular Phones, PDAs, Appliances, AV Equipment, Automobiles + Applications, Services,

Conventional I T Society Ubiquitous Network Society

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  • Prof. Iwao Sasase, Keio University

Variety of Access Networks

Ground-based broadcasting, Digital satellite broadcasting Public telephone network FTTH（ fiber-optics), ADSL,Ｃ Ａ Ｔ Ｖetc. wired access network （ narrow sense）

PDA PC

TV

camera

Home link

telephone audio

ITS Hot spot communication by wired/wireless LAN, Infrared、 Local wireless communication by Bluetooth, UWB etc. Broadband mobile communication

LAN

Backbone network

FWA, Cellular phone etc. wireless access network（ narrow sense） Fiber-optic network

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  • Prof. Iwao Sasase, Keio University

Wired Communications

MODEM ADSL,CATV,FTTH 10base, 100base Ethernet Gbit Ethernet, WDM, ATM etc.

Access Network Backbone

Bit Rate

Mobile and Wireless Communications

Mobile (2G) PHS IMT-2000 (3G)

Wireless LAN Fixed Wireless Access

Access Network Backbone

9.6k 64k 2M 10M 100M

Big Gap in Access Network!!

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  • Prof. Iwao Sasase, Keio University

2G GSM IS54 PDC 3G WCDMA cdma2000 4G Broadband mobile communication W i r e l e s s L A N 1 G I E E E 8 2 . 1 1 b

W i r e l e s s L A N 2 G I E E E 8 2 . 1 1 a , M M A C Fixed Wireless Access

10kbps 2Mbps 10Mbps 100Mbps Data rate Mobility

High- speed Medium- speed Walk fixed Broadband Wireless Seamless Communications

Development of Broadband Wireless Communications

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  • Prof. Iwao Sasase, Keio University

Our View of 4G Mobile and Wireless Communications

Significant Paradigm Shift Should be Considered to Set the Targets ! – Higher Transmission Rate up to 100Mbps – Flexible to Advanced Internet, QoS Control – Enhanced Security – Seamless Operation across Networks – Multiple Broadband Access Options in Combined Public and Private Networks (Including Wireless LAN, Wireless Home link and Ad-Hoc Network)

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  • Prof. Iwao Sasase, Keio University

Our View of IP-Based 4G Mobile and Wireless Network Architecture

Services Middleware Service Support Layer (Location, Billing,

Media Conversion, Distribution…)

Basic Network Management Layer

(Multiple Interface Management, Mobility Management using Mobile Anchor Point with Buffer , Security, QoS…)

Applications IP-based Back Bone Transport Network

Multi Modal Access

Ad-hoc Network Wireless LAN Bluetooth UWB W-CDMA cdma2000 Home link Network

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  • Prof. Iwao Sasase, Keio University

Keio University 21st Century COE Program Optical and Electronic Device Technology for Access Network Leader : Prof. Toshiaki Makabe

Core Device Technology

Broadband Mobile Communications Intelligent Transport Systems Real Time Computing Mobile Computing with IPv6 Electronic Device for Software Radio

Optical and Wireless Access Network

Radio Module Using System LSI・ Low Power and High Performance System LSI Nano Photonics Optical Memory with Ultra Large Capacity Ultra High Speed Optical , Signal Processing Circuit, Optical/Electronics Integrated Device, Photonic Node Technology Broadband Plastic Optical Fiber (POF) Photonic Network Top Down Device Processing Technology Wireless Home Link ( Wireless 1394) Application Technology for Mobile Terminal Multimedia Information Processing Real Time Signal Real Time Signal Processing Processing Seamless Connection High Speed LAN

Backbone Network

Wireless Communication Using LED Light and POF

http://www.coee.keio.ac.jp/

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  • Prof. Iwao Sasase, Keio University

Our COE Research Programs Related to Mobile and Wireless Communications

  • 1. Broadband mobile communications
  • 2. Wireless homelink and wireless ad-hoc networks
  • 3. IPv6-based next generation mobile and ubiquitous

Environment

  • 4. Visible-light communications
  • 5. Reconfigurable RF MEMS

10 professors and more than 100 graduate students are working hard in these research programs.

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  • Prof. Iwao Sasase, Keio University

Our On-Going Research on Broadband Mobile Communications

  • 1. High Speed OFDM/CDMA with MIMO
  • 2. Interference Reduction Techniques
  • 3. High Speed Packet Scheduling Algorithm
  • 4. Seamless Networking by Handover and Mobile IP

The mission is to achieve high-speed transmission and flexible QoS control in broadband mobile communications by utilizing adaptive modulation, space- time coding, adaptive array antenna, and MIMO （ multi-input multi-output). Joint Project with NTT DoCoMo

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  • Prof. Iwao Sasase, Keio University

Wireless 1394 Home Link System

BS-Digital High Definition TV

ARIB Standard T72 (40Mbps, Isochronous) Wireless 1394 is the standardized wireless home Link which assures video streaming transmission. Wireless 1394 was proposed as a first wireless home link scheme in the world by TAO Shin-Kawasaki Research Center (Project leader: Prof. M .Nakagawa, Keio Univ. ) in 1997, and was standardized by ARIB in 2001.

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  • Prof. Iwao Sasase, Keio University

Our On-Going Research on Wireless Home link (Wireless 1394)

  • 1. Improvement of channel Utilization and video

transmission quality in multipath fading environment

  • 2. Reduction of shadowing effect due to human body

Frame structure consisting Iso slots for real-time video and Async slots for data Star topology for control traffic

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  • Prof. Iwao Sasase, Keio University

Our On-Going Researches on Ad-hoc Networks

  • 1. MAC protocols for broadcasting to improve throughput

performance while keeping highly reliable broadcasting

  • 2. Multi-level zone-based hierarchical link state routing

with the new location search technique for mobile ad-hoc networks

  • 3. An effective multicast routing protocol in ad-hoc network with

asymmetric link

  • 4. A low latency handoff scheme using positional information for

mobile IP based networks

The consortium on ad hoc wireless networks started in Japan in December 2004 aiming at promotion of R&D on ad hoc networks.

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  • Prof. Iwao Sasase, Keio University

Mobile and Ubiquitous Environment

IPv6

Network Layer Protocol Providing Node Mobility Enhancement of Face-to-Face Collaboration Space Integration of Distributed Resources Dynamic Information Composite Framework for PAN

Our On-Going Research on IPv6-Based Next Generation Mobile and Ubiquitous Environment

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  • Prof. Iwao Sasase, Keio University

Main Research Topics at Sasase Lab.

  • Broadband Mobile Communications
  • Ad-Hoc Wireless Communications
  • Wireless Home Link (Wireless 1394)
  • Optical CDMA and WDMA
  • Photonic Networks and Multicast Switches
  • Network Security

http://www.sasase.ics.keio.ac.jp

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  • Prof. Iwao Sasase, Keio University

Research Areas at Sasase Lab.

Mobile and Wireless Communications Communication Networks

Optical Burst Switching, Optical CDMA, WDMA, Photonic Networking, Multicast Switch, ADSL, Mobile Comm., Personal Comm., W-CDMA, Ad-hoc Comm., Infrared, Smart Antenna, MIMO, OFDM, Wireless 1394...

Communication Systems / Information Theory Network Security/ Signal Processing

Digital Modulation & Demodulation,

  • Com. Protocols, Interference Canceller,

Trellis Coded Modulation, Queuing Theory, Coding theory, Optical Com. Theory... Individual Authentication, Intrusion Detection System, Radar Signal Processing.

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  • Prof. Iwao Sasase, Keio University

Achievement in Recent 8 Years

10 20 30 40 96 97 98 99 1 2 3 Journal papers International Conference Technical Respots

All the post graduate students have presented their papers at international conferences. More than 90% of the post graduate students have published journal papers.

209 Journal Papers, 297 International Conference papers

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  • Prof. Iwao Sasase, Keio University

excellent-caliber academic research coop

Enterprises Keio University Capital, Fund Ｃ Ｏ Ｅ

COE c

  • p

communication and device technology

Ph.D. with High Techs

coop

Keio University 21st Century COE Program Optical and Electronic Device Technology for Access Network Leader : Prof. Toshiaki Makabe

Network of Excellence Promote International Cooperation and Standardization Activities Accelerate R&D Activities

Ventures

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  • Prof. Iwao Sasase, Keio University

①Broadband Mobile Communications Technology ②Wireless Ad-Hoc Network Technology ③Software Radio Technology ④User Oriented Application Technology ⑤Mobile Platform Technology

Strategy for New Mobile Communication System

Key R&D Projects Create Platform for New Application and Market Promote International Cooperation Promote Standardization Activities Accelerate R&D activities

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  • Prof. Iwao Sasase, Keio University

To Produce Break-Through Technology

  • Encourage to Make New Idea with Originality
  • Creative Research Environment
  • Education on Information Technology
  • Produce Globally Active Human Resources
  • National Strategic Project and Policy
  • Flexible and Open Interchange of Personnel
  • Fair Evaluation for Achievement
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  • Prof. Iwao Sasase, Keio University

Way of Thinking

Japanese Americans

  • Stability-oriented

Challenging Spirit

  • Cooperative

Individual

  • Equal Treatment

Equal Opportunity

  • Consultation

Clear Decision Making

  • All-round

Unique and Special

  • No.1

Only One

  • Steady, Punctual Strategic, Aggressive