CMPE 257 Wireless and Mobile Networking Katia Obraczka Computer Engineering UCSC Baskin Engineering Lecture 1 CMPE 257 Winter 11 1 Welcome to CE 257 Class information When MW 5 6 45 Where BE 156 Class Web page http www soe ucsc edu classes cmpe257 Winter11 CMPE 257 Winter 11 2 About the Instructor Katia Obraczka Office E2 323 E mail katia at soe ucsc edu Internetworking Research Group INRG E2 311 For more info visit inrg soe ucsc edu CMPE 257 Winter 11 3 Class Web Page www soe ucsc edu classes cmpe257 Winter11 Students need to check the Web page frequently Lecture notes Readings Assignments News Project information CMPE 257 Winter 11 4 Course Focus From the Web page This class covers various topics relevant to wireless networking and mobile computing It focuses on communication protocols for wireless networks in particular multi hop ad hoc networks from medium access control to end toend transport CMPE 257 Winter 11 5 Pre requisites CE 252A Or instructor s consent need permission code CMPE 257 Winter 11 6 Audience and Requirements Advanced grad class Lots of reading Programming project strong programming skills In class discussions and student participation is a must In class student presentations CMPE 257 Winter 11 7 Course Format Lectures student presentations Material based on research papers Ad Hoc Wireless Networks Architectures and Protocols by C Siva Ram Murthy and B S Manoj can be used as a reference In class discussions are critical Papers must be read before each class CMPE 257 Winter 11 8 Grading Grades will account for In class participation 5 In class presentation 15 Reading reports 15 Project 40 Content 20 Report 10 Presentation Demo 10 Exam 25 Disclaimer Don t expect automatic B s CMPE 257 Winter 11 9 Project Project is a major part of the grade Chance to start looking into possible thesis research directions List of suggested projects will be provided Implementation Simulation Project suggestions welcome Need instructor s approval Project proposal required CMPE 257 Winter 11 10 Project Proposal Project proposal should contain Project title Motivation Brief description of proposed approach Basic design Evaluation and testing methodology Demo plan CMPE 257 Winter 11 11 Student Responsibilities Academic Integrity All work must be individual unless otherwise agreed with instructor OK to have discussions on ideas but turn in your own work Ask instructor if there are any questions For more info go to www ucsc edu academics academic integrity CMPE 257 Winter 11 12 Students Responsibilities Papers to be covered in class must be read before lecture Brief summaries of the papers need to be submitted prior to class Have summaries handy during class to help in discussions Web page must be checked frequently for updates CMPE 257 Winter 11 13 Readings Bulk of readings based on recent research papers Reference textbook Ad Hoc Wireless Netws Architectures and Protocols by C Siva Ram Murthy and B S Manoj CMPE 257 Winter 11 14 Course Outline tentative Wireless MAC Network layer issues Unicast and multicast routing Wireless internetworking Capacity of wireless networks E2E protocols Miscellaneous DTN Mobility management New architectures Hybrid networks Security Localization Power and topology management CMPE 257 Winter 11 15 History of Wireless Communication CMPE 257 Winter 11 Source Nitin Vaidya s slides 16 Today Wireless Everywhere Remote control Cordless telephone Headsets Garage openers Badges Cell phones modems Radio Pagers Satellite TV Wireless LAN cards Laptops Netbooks Tablets PDAs Smart phones Sensor nodes CMPE 257 Winter 11 17 Wireless Communication Typically we assume RF communication This means sharing of the RF spectrum Access regulated by the government Some compatibility issues for world wide communications US spectrum allocation chart http www ntia doc gov osmhome allochrt pdf CMPE 257 Winter 11 18 ISM Frequency From Wikipedia The industrial scientific and medical ISM radio bands were originally reserved internationally for the use of RF electromagnetic fields for industrial scientific and medical purposes other than communications In general communications equipment must accept any interference generated by ISM equipment Spans from 6 8 MHz to 2 4 GHz Microwaves cordless phones WLAN devices CMPE 257 Winter 11 19 When did wireless meet the Internet CMPE 257 Winter 11 20 Some Internet History ARPAnet developed deployed in late 60 s early 70 s 1974 RFC 675 first specification of TCP Early 80 s TCP IP deployed CMPE 257 Winter 11 21 Internet Design Principles Layered system design Simplicity Modularity maintainability extensibility Minimalist design Keep network core simple Robustness Place functionality at the edges E2E argument CMPE 257 Winter 11 22 The Hourglass Approach TCP IP stack From Steve Deering s IETF 2001 presentation CMPE 257 Winter 11 23 So CMPE 257 Winter 11 24 So applications Technology push Higher chip technology integration Microsensors Unlicensed spectrum availability New radios UWB MIMO SDR Batteries Low power hardware architectures IP transmission media CMPE 257 Winter 11 Application push New more demanding app s more interactive more bandwidth etc 25 Re think the Internet E g NSF s clean slate initiative IRTF DTNRG working group etc CMPE 257 Winter 11 26 The Vision The Internet of the Future CMPE 257 Winter 11 27 Re think the Internet Cross layer design Use the core More intelligence More storage More bandwidth CMPE 257 Winter 11 28 Lots of Interesting New Topics Heterogeneous networking with support for connectivity disruptions Content centric networking User centric networking Ambient computing CMPE 257 Winter 11 29 Wireless Networks Infrastructure based networks Cellular WLANs Mesh Infrastructure less networks Aka self organizing Ad hoc networks Sensor networks Hybrid networks CMPE 257 Winter 11 30 Wireless Local Area Networks WLANs Infrastructure based deployment Local area connectivity using wireless communication IEEE 802 11 WLAN standard Wireless LAN may be used for Last hop to a wireless host Wireless connectivity between hosts on the LAN CMPE 257 Winter 11 31 802 11 Evolution Working group founded in 1987 Standard came out in 1997 Includes infrared Originally featured FH and DS But as of late 2001 only DS SS modems had been standardized for high rates 11Mbps 802 11a up to 54 Mbps in 5 GHz band 802 11b 5 5 and 11 Mbps and more CMPE 257 Winter 11 32 Bluetooth and PANs PAN personal area network Open standard for enabling various devices to