1 / 15

Ubiquitous Networks Introduction

Ubiquitous Networks Introduction. Lynn Choi Korea University. Class Information. Lecturer Prof. Lynn Choi, School of Electrical Eng. Phone: 3290-3249, 공학관 41 1, lchoi@korea.ac.kr , Time Thur 9:00am – 11:45am Office Hour: Thur 3:30pm – 4:30pm Place 창의관 117 Textbook

hiram-norris
Download Presentation

Ubiquitous Networks Introduction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ubiquitous NetworksIntroduction Lynn Choi Korea University

  2. Class Information • Lecturer • Prof. Lynn Choi, School of Electrical Eng. • Phone: 3290-3249, 공학관 411, lchoi@korea.ac.kr, • Time • Thur 9:00am – 11:45am • Office Hour: Thur 3:30pm – 4:30pm • Place • 창의관 117 • Textbook • Collection of research papers: refer “Reading List” • References • “Wireless Sensor Networks: An Information Processing Approach”, Feng Zhao and Leonidas Guibas, Morgan Kaufmann, 2004. • “Ad Hoc Networking", Charles E. Perkins, Addison-Wesley, December 2000. • “Wireless Ad Hoc and Sensor Networks: Theory and Application”, Li, Cambridge Press. • Class homepage: http://it.korea.ac.kr

  3. Ubiquitous Network 개념 • 새로운 Ubiquitous computing시대에서 사용될 수 있는 모든 종류의 기기와 애플리케이션, 즉 무선통신과 방송을 포함하여 현재 인터넷이 의존하고 있는 대역폭보다 훨씬 광대역을 제공할 수 있는 하나의 통합망을 지칭함 • 유선망과 무선망, 고정망과 이동망, 방송망과 통신망, 칩과 센서 네트워크 등 수많은 종류의 망들이 하나로 연결되고 생활 주변의 단말과 디바이스 및 가전기기들이 자유롭게 연결되서 활용될 수 있는 네트워크 • Ubiquitous 시대에 사용될 수 있는 기기와 애플리케이션으로는 paper computers, wearable computers, portable computer, mobile telephone, multimedia kiosks, videogame machines, set-top boxes, digital TV sets, car navigation systems, information appliances 등이 논의되고 있음.

  4. Ubiquitous Network 구축 핵심기술 유비퀴터스 네트워크의 모습 Ubiquitous flexible broadband 모든 미디어로 초고속망을 수백만명이 동시에 이용할 수 있으며, 스트레스 없는 유연한 통신 환경을 실현 Ubiquitous teleportation 어디에 있어도 어떠한 단말로도 네트 워크에 언제나 연결되어 생활공간을 자유롭게 만들 수 있음 Ubiquitous sensor network 신변주변의 기계가 커뮤니케이션을 할 수 있도록 자율적으로 정보를 수집 및 관리 Ubiquitous Network Ubiquitous agent 언제나 원하는 정보를 실시간으로 이용자 요구에 맞는 형태로 향수할 수 있으며, OS 및 서비스를 자유롭 게 선택 및 이용 Ubiquitous platform 고도의 인증과 보안으로 프라이버시가 보호되어 다양한 서비스를 누구라도 안심하고 이용 Ubiquitous appliance 남녀노소를 막론하고 간편하게 사용하며, 높은 조작성, 콤팩트성을 실현 Ubiquitous contents 소유권을 명확히 하여, 매력있는 컨텐츠를 자유롭게 유통 및 이용

  5. A New Lifestyle: Lifelog with Smart Phone

  6. Example of a Lifelog Record

  7. Wireless Technologies • 4G Cellular(IMT-Advanced): high-speed 1Gbps, low-speed 100Mbps • Pre-4G technologies • 3GPP LTE (Dec 2009) – evolved from WCDMA/GSM under ETSI • A set of enhancements to UMTS, at least 100Mbps downlink and 50Mbps uplink • IEEE 802.16e Mobile WiMAX (June 2006) –from WiBro (WMAN) • 4G technologies • LTE-Advanced (2012), 802.16m (WMAN advanced) • WLAN • IEEE 802.11n: 2.4GHz/5GHz – up to 600Mbps • Backward compatible with11a/g (54Mbps) • WPAN • IEEE 802.15.1 (Bluethooth): 1~100m,1Mbps(v1.2)~24Mbps(v3.0) • IEEE 802.15.3 (High rate WPAN): 11~55Mbps • IEEE 802.15.4(Low rate WPAN)/Zigbee: 10m range, 20~250kbps • Mobile Ad Hoc Networks • WSN(Wireless Sensor Network), MANET(Mobile Ad-hoc Network)

  8. LTE (Long Term Evolution) Characteristics

  9. Enabling Technologies • MIMO (Multiple Input Multiple Output) • With N antennas, you can increase the transmission rate by N times • Smart antennas • Antenna arrays with smart signal processing algorithms used to identify spatial signal signature such as the direction of arrival (DOA) of the signal • UWB (Ultra-Wide Band) • A radio technology that can be used at very low energy levels for short-range high-bandwidth communications by using a wide radio spectrum • Very low power, very small devices • OFDM • A large number of closely-spaced orthogonal sub-carriers are used to carry data. The data is divided into several parallel data channels, one for each sub-carrier. • Can cope with severe channel conditions • SDR (Software Defined Radio) • A radio communication system where components that have been typically implemented in hardware (e.g. filters, amplifiers, modulators/demodulators) are implemented by software on a PC or embedded computing devices.

  10. The Content of the Class • We will discuss wireless ad hoc networks. • What is ad hoc networks? • “Ad Hoc” means • “for this purpose only”, “temporary” • “Ad Hoc Network” means • Infrastructure-less network • No wired infrastructure such as base stations, access points, or routers • Self-organizing • Short-lived • Temporary network just for the communication needs of the moment • Dynamic topology • The topology can be changed dynamically due to node mobility, node autonomity, power, failure, etc. • Main topics: networking issues in sensor networks/MANET

  11. Wireless Ad Hoc Network Taxonomy • Infrastructure-based versus ad-hoc network • Single-hop versus multi-hop wireless links • Hybrid wireless networks • Integration of infrastructure-based and ad hoc networks Wireless Networks Infrastructure-based Infrastructure-less Cellular Networks Mobile Nodes Static Nodes Wireless LANs Mobile Ad Hoc Networks Sensor Networks

  12. Content of Class • MAC layer • MAC basics: WLAN, WPAN: 802.15.1/3/4 (1 week) • Low power sensor network MAC protocols (1 week) • S-MAC, WiseMAC, A-MAC • Wakeup scheduling and topology control (1 week) • DMAC, SPEEDMAC • Clock synchronization for sensor networks (1 week) • NTP, TPSN, RBS, FTSP • Routing layer • Low power multi-hop routing protocols (1 week) • Directed Diffusion, TTDD, VSR • Geographical routing: GPSR (1 weeks) • Routing for MANET and MSN: proactive versus reactive routing (2 weeks) • DSDV, DSR, AODV • Mobile sensor networks • Other layers and cross layer issues • Localization, Coverage (1 week)

  13. Class Schedule • Sensor Networks (8/30) • Introduction, Sensor Networks • MAC basics (9/6) • WLAN Basics • WPAN (Bluetooth, 802.15.3, 802.15.4/Zigbee) • 추석 (9/13) • MAC (9/20) • Introduction S-MAC, WiseMAC, A-MAC • Sensor network MAC protocols • Wakeup Scheduling (9/27) • DMAC, SpeedMAC • Clock Synchronization (10/4) • Clock synchronization • Introduction to NTP, TPSN, RBS, FTSP • Routing issues (10/11) • Introduction to Directed Diffusion, TTDD, VSR • Sensor network routing protocols

  14. Class Schedule • Midterm Exam (10/18) • MANET introduction (10/25) • Introduction to DSDV, DSR, AODV • Geographic routing (11/1) • Introduction to GPSR, M-Geocast • Recent MANET/MSN research issues (11/8, 11/15, 11/22) • Mobile sensor networks, ad hoc network community: TAR • Aggregation, reliability, efficient broadcast, clustering, etc. • Operating system and programming environment • Project presentation (11/29) • Final exam (12/6)

  15. Grading • Midterm: 35% • Final: 35% • Presentation: 15% • 3 presentations per person • Project: 15% • Novel ideas • Experimentation: simulation • Class participation: +/-5%

More Related