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 University Iwao Sasase, Keio University http://www.sasase.ics.keio.ac.jp Email sasase@ics.keio.ac.jp Prof. Iwao Sasase, Keio University page1
Yagami Campus, Keio University, Yokohama Japan http://www.keio.ac.jp/index-en.html Prof. Iwao Sasase, Keio University page2
Ｋ ２ Campus, Keio University Kawasaki, Japan http://www.k2.keio.ac.jp/index.htm Prof. Iwao Sasase, Keio University page3
Paradigm Shift in Networking Ubiquitous Network Distributed 2005 Connection Type Broadband & Wireless Computing IP Nomadic Multi Modal Seamless Services Mobile Internet 2001 Always-on Wireless LAN IP Service Driven Connection Fixed Mobile Driven Client-Server Dial up Web Driven Server-Centric Peer-to-Peer (Person) P-to-P (Everything) Connection Model Prof. Iwao Sasase, Keio University page4
What is Ubiquitous Network ? Ubiquitous: Omnipresence 【 Latin 】 ・ Computing Everywhere ・ Content Everywhere ・ Connectivity Everywhere ① Seamless Connection and Service ② Location, Context & Preference-Aware Service Prof. Iwao Sasase, Keio University page5
Is Japan Strong in Ubiquitous Era ？ Conventional I T Society Ubiquitous Network Society Hardware & Software Cellular Phones, PDAs, (OS ， Applications) Appliances, AV Equipment, Network Technology Automobiles Applications + Applications, Services, 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. Prof. Iwao Sasase, Keio University page6
Variety of Access Networks Fiber-optic Backbone network LAN network Hot spot communication by wired/wireless FWA, Cellular phone etc. wireless LAN, Infrared 、 access network （ narrow sense ） Local wireless Ground-based communication by Bluetooth, UWB etc. broadcasting, Digital satellite Broadband mobile PC camera broadcasting communication PDA telephone Public telephone network ITS FTTH （ fiber-optics), audio Home link ADSL, Ｃ Ａ Ｔ Ｖ etc. TV wired access network （ narrow sense ） Prof. Iwao Sasase, Keio University page7
Wired Communications Access MODEM ADSL,CATV,FTTH Network 10base, 100base Ethernet Big Gap in Access Backbone Gbit Ethernet, WDM, ATM etc. Network!! 9.6k 64k 2M 10M 100M Bit Rate Mobile and Wireless Communications Mobile PHS Access (2G) IMT-2000 (3G) Network Wireless LAN Fixed Wireless Access Backbone Prof. Iwao Sasase, Keio University page8
Development of Broadband Wireless Communications Mobility Broadband Wireless High- Seamless speed Communications 3G 4G 2G GSM Medium- WCDMA Broadband IS54 speed PDC cdma2000 mobile communication Walk W i r e l e s s L A N 1 G W i r e l e s s L A N 2 G I E E E 8 0 2 . 1 1 a , M M A C I E E E 8 0 2 . 1 1 b Fixed Wireless fixed Access 10kbps 2Mbps 10Mbps 100Mbps Data rate Prof. Iwao Sasase, Keio University page9
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) Prof. Iwao Sasase, Keio University page10
Our View of IP-Based 4G Mobile and Wireless Network Architecture Applications 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…) IP-based Back Bone Transport Network Multi Modal Access W-CDMA Wireless Bluetooth Ad-hoc Home link cdma2000 LAN UWB Network Network Prof. Iwao Sasase, Keio University page11
Keio University 21st Century COE Program Optical and Electronic Device Technology for Access Network Leader : Prof. Toshiaki Makabe Radio Module Using System LSI ・ Low Power and Nano Photonics Backbone Network High Performance Optical Memory with Intelligent System LSI Ultra Large Capacity Transport Systems Optical and Wireless Access Network Broadband Plastic Optical Fiber (POF) Photonic Network Core Device Technology High Speed Wireless Home Top Down Device Broadband LAN Link ( Wireless Processing 1394) Mobile Real Time Computing Technology Communications Mobile Computing with IPv6 Ultra High Speed Optical , Signal Electronic Device for Software Radio Processing Circuit, Optical/Electronics Integrated Device, Photonic Node Application Technology for Mobile Terminal Technology Seamless Multimedia Information Processing Real Time Signal Real Time Signal Processing Processing Connection Wireless Communication Using LED Light and POF http://www.coee.keio.ac.jp/ Prof. Iwao Sasase, Keio University page12
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. Prof. Iwao Sasase, Keio University page13
Our On-Going Research on Broadband Mobile Communications 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). 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 Joint Project with NTT DoCoMo Prof. Iwao Sasase, Keio University page14
Wireless 1394 Home Link System 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. ARIB Standard T72 (40Mbps, Isochronous) BS-Digital High Definition TV Prof. Iwao Sasase, Keio University page15
Our On-Going Research on Wireless Home link (Wireless 1394) Frame structure consisting Iso slots for real-time video and Async slots Star topology for for data control traffic 1. Improvement of channel Utilization and video transmission quality in multipath fading environment 2. Reduction of shadowing effect due to human body Prof. Iwao Sasase, Keio University page16
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. Prof. Iwao Sasase, Keio University page17
Our On-Going Research on IPv6-Based Next Generation Mobile and Ubiquitous Environment Dynamic Information Integration of Composite Framework IPv6 Distributed Resources for PAN Mobile and Ubiquitous Environment Network Layer Protocol Enhancement of Face-to-Face Providing Node Mobility Collaboration Space Prof. Iwao Sasase, Keio University page18
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 Prof. Iwao Sasase, Keio University page19
Research Areas at Sasase Lab. Mobile and Communication Networks Wireless Communications Mobile Comm., Personal Comm., Optical Burst Switching, Optical CDMA, W-CDMA, Ad-hoc Comm., Infrared, WDMA, Photonic Networking, Smart Antenna, MIMO, OFDM, Multicast Switch, ADSL, Wireless 1394... Communication Systems / Network Security/ Information Theory Signal Processing Digital Modulation & Demodulation, Individual Authentication, Intrusion Com. Protocols, Interference Canceller, Detection System, Radar Signal Trellis Coded Modulation, Queuing Processing. Theory, Coding theory, Optical Com. Theory... Prof. Iwao Sasase, Keio University page20
Achievement in Recent 8 Years 40 Journal 30 papers International 20 Conference Technical 10 Respots 0 96 97 98 99 0 1 2 3 209 Journal Papers, 297 International Conference papers All the post graduate students have presented their papers at international conferences. More than 90% of the post graduate students have published journal papers. Prof. Iwao Sasase, Keio University page21
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