Chapter 6 Wireless and Mobile Networks. Chapter 6 outline. Chapter 6: Wireless and Mobile Networks. Elements of a wireless network.

Size: px
Start display at page:

Download "Chapter 6 Wireless and Mobile Networks. Chapter 6 outline. Chapter 6: Wireless and Mobile Networks. Elements of a wireless network."

Transcription

1 Chapter 6 Wireless and obile Networks Computer Networking: A Top Down Approach Featuring the Internet, 3 rd edition. Jim Kurose, Keith Ross Addison-Wesley, July Chapter 6: Wireless and obile Networks Background: # wireless (mobile) phone subscribers now exceeds # wired phone subscribers! computer nets: laptops, palmtops, DAs, Internet-enabled phone promise anytime untethered Internet access two important (but different) challenges communication over wireless link handling mobile user who changes point of attachment to 6: Wireless and obile Networks 6 6: Wireless and obile Networks 6-2 Chapter 6 outline Elements of a wireless 6. Introduction Wireless 6.2 Wireless links, characteristics CDA 6.3 IEEE 802. wireless LANs ( wi-fi ) 6.4 Cellular Internet Access architecture standards (e.g., G) obility 6.5 rinciples: ing and routing to mobile users 6.6 obile I 6.7 Handling mobility in cellular s 6.8 obility and higherlayer protocols 6.9 ummary wireless hosts laptop, DA, I phone run applications may be stationary (non-mobile) or mobile wireless does not always mean mobility 6: Wireless and obile Networks 6-3 6: Wireless and obile Networks 6-4

2 Elements of a wireless Elements of a wireless base station typically connected to wired relay - responsible for sending packets between wired and wireless host(s) in its area e.g., cell towers 802. access points wireless link typically used to connect mobile(s) to base station also used as backbone link multiple access protocol coordinates link access various data rates, transmission distance 6: Wireless and obile Networks 6-5 6: Wireless and obile Networks bps 384 Kbps 56 Kbps Characteristics of selected wireless link standards 5 bps bps 802.{a,g} b Indoor UT/WCDA, CDA2000 Outdoor I-95 CDA, G id range outdoor Long range outdoor 3G 2G Elements of a wireless mode base station connects mobiles into wired handoff: mobile changes base station providing connection into wired 0 30m m 200m 4Km 5Km 20Km 6: Wireless and obile Networks 6-7 6: Wireless and obile Networks 6-8

3 Elements of a wireless Ad hoc mode no base stations nodes can only transmit to other nodes within link coverage nodes organize themselves into a : route among themselves Wireless Link Characteristics Differences from wired link. decreased signal : radio signal attenuates as it propagates through matter (path loss) interference from other sources: standardized wireless frequencies (e.g., 2.4 GHz) shared by other devices (e.g., phone); devices (motors) interfere as well multipath propagation: radio signal reflects off objects ground, arriving ad destination at slightly different times. make communication across (even a point to point) wireless link much more difficult 6: Wireless and obile Networks 6-9 6: Wireless and obile Networks 60 Wireless characteristics ultiple wireless senders and receivers create additional problems (beyond multiple access): A Hidden terminal problem B, A hear each other B, C hear each other A, C can not hear each other means A, C unaware of their interference at B C B A B C A s signal space C s signal ignal fading: B, A hear each other B, C hear each other A, C can not hear each other interferring at B 6: Wireless and obile Networks 6 Code Division ultiple Access (CDA) used in several wireless broadcast s (cellular, satellite, etc) standards unique code assigned to each user; i.e., code set partitioning all users share same frequency, but each user has own chipping sequence (i.e., code) to encode data encoded signal = (original data) X (chipping sequence) decoding: inner-product of encoded signal and chipping sequence allows multiple users to coexist and transmit simultaneously with minimal interference (if codes are orthogonal ) 6: Wireless and obile Networks 62

4 CDA Encode/Decode CDA: two-sender interference sender data bits code d = d 0 = slot slot 0 Z i,m = d i. cm Z i,m slot slot 0 received input receiver code slot slot 0 D i = Σ Z. i,m cm m= d = slot d 0 = slot 0 6: Wireless and obile Networks 63 6: Wireless and obile Networks 64 Chapter 6 outline IEEE 802. Wireless LAN 6. Introduction Wireless 6.2 Wireless links, characteristics CDA 6.3 IEEE 802. wireless LANs ( wi-fi ) 6.4 Cellular Internet Access architecture standards (e.g., G) obility 6.5 rinciples: ing and routing to mobile users 6.6 obile I 6.7 Handling mobility in cellular s 6.8 obility and higherlayer protocols 6.9 ummary 802.b GHz unlicensed radio spectrum up to bps direct sequence spread spectrum (D) in physical layer all hosts use same chipping code widely deployed, using base stations 802.a 5-6 GHz range up to 54 bps 802.g GHz range up to 54 bps All use CA/CA for multiple access All have base-station and ad-hoc versions 6: Wireless and obile Networks 65 6: Wireless and obile Networks 66

5 802. LAN architecture 802.: Channels, association B A Internet hub, switch or router A B 2 wireless host communicates with base station base station = access point (A) Basic ervice et (B) (aka cell ) in mode contains: wireless hosts access point (A): base station ad hoc mode: hosts only 6: Wireless and obile Networks b: 2.4GHz-2.485GHz spectrum divided into s at different frequencies A admin chooses frequency for A interference possible: can be same as that chosen by neighboring A! host: must associate with an A scans s, listening for beacon frames containing A s name (ID) and AC selects A to associate with may perform authentication will typically run DHC to get I in A s subnet 6: Wireless and obile Networks 68 IEEE 802.: multiple access avoid collisions: 2 + nodes transmitting at same time 802.: CA - sense before transmitting don t collide with ongoing transmission by other node 802.: no collision detection! difficult to receive (sense collisions) when transmitting can t sense all collisions in any case: hidden terminal, fading goal: avoid collisions: CA/C(ollision)A(voidance) A C B A B C A s signal C s signal IEEE 802. AC rotocol: CA/CA 802. sender if sense idle for DIF then transmit entire frame (no CD) 2 if sense busy then start random backoff time timer counts down while idle transmit when timer expires if no ACK, increase random backoff interval, repeat receiver - if frame received OK return ACK after IF DIF sender data ACK receiver IF space 6: Wireless and obile Networks 69 6: Wireless and obile Networks 6-20

6 Avoiding collisions (more) Collision Avoidance: RT-CT exchange idea: allow sender to reserve rather than random access of data frames: avoid collisions of long data frames sender first transmits small request-to-send (RT) packets to B using CA RTs may still collide with each other (but they re short) B broadcasts clear-to-send (CT) in response to RT CT heard by all nodes A RT(A) RT(A) CT(A) A reservation collision CT(A) B RT(B) sender transmits data frame other stations defer transmissions DATA (A) defer Avoid data frame collisions completely using small reservation packets! time ACK(A) ACK(A) 6: Wireless and obile Networks 6-2 6: Wireless and obile Networks frame: ing 802. frame: ing frame duration 2 3 seq 4 payload CRC H R router Internet A Address : AC of wireless host or A to receive this frame Address 2: AC of wireless host or A transmitting this frame Address 3: AC of router interface to which A is attached R AC addr A AC addr dest. source frame A AC addr H AC addr R AC addr frame 6: Wireless and obile Networks : Wireless and obile Networks 6-24

7 802. frame: more 802.: mobility within same subnet frame duration of reserved transmission time (RT/CT) duration 2 3 seq frame seq # (for reliable ARQ) 4 payload CRC rotocol To From ore ower ore Type ubtype Retry WE Rsvd version A A frag mgt data H remains in same I subnet: I can remain same switch: which A is associated with H? self-learning (Ch. 5): switch will see frame from H and remember which switch port can be used to reach H BB A router hub or switch A 2 H BB 2 frame type (RT, CT, ACK, data) 6: Wireless and obile Networks : Wireless and obile Networks : personal area less than 0 m diameter replacement for cables (mouse, keyboard, headphones) ad hoc: no master/slaves: slaves request permission to send (to master) master grants requests 802.5: evolved from Bluetooth specification GHz radio band up to 72 kbps aster device lave device radius of coverage arked device (inactive) 6: Wireless and obile Networks 6-27

Chapter 6 Wireless and Mobile Networks

Chapter 6 Wireless and Mobile Networks Chapter 6 Wireless and Mobile Networks Computer Networking: A Top Down Approach Featuring the Internet, 3 rd edition. Jim Kurose, Keith Ross Addison-Wesley, July 2004. 6: Wireless and Mobile Networks 6

More information

Wireless Networks. CSE 3461: Introduction to Computer Networking Reading: , Kurose and Ross

Wireless Networks. CSE 3461: Introduction to Computer Networking Reading: , Kurose and Ross Wireless Networks CSE 3461: Introduction to Computer Networking Reading: 6.1 6.3, Kurose and Ross 1 Wireless Networks Background: Number of wireless (mobile) phone subscribers now exceeds number of wired

More information

CSC 4900 Computer Networks: Wireless Networks

CSC 4900 Computer Networks: Wireless Networks CSC 4900 Computer Networks: Wireless Networks Professor Henry Carter Fall 2017 Last Time Mobile applications are taking off! What about current platforms is fueling this? How are an application s permission

More information

Chapter 6 Wireless and Mobile Networks. Chapter 6 outline. Chapter 6: Wireless and Mobile Networks. Elements of a wireless network

Chapter 6 Wireless and Mobile Networks. Chapter 6 outline. Chapter 6: Wireless and Mobile Networks. Elements of a wireless network Chapter 6 Wireless and Mobile Networks Computer Networking: Top Down pproach 5 th edition. Jim Kurose, Keith Ross ddison-wesley, pril 009. Chapter 6: Wireless and Mobile Networks ackground: # wireless

More information

Wireless and Mobile Networks 7-2

Wireless and Mobile Networks 7-2 Wireless and Mobile Networks EECS3214 2018-03-26 7-1 Ch. 6: Wireless and Mobile Networks Background: # wireless (mobile) phone subscribers now exceeds # wired phone subscribers (5-to-1)! # wireless Internet-connected

More information

Data Communication & Networks G Session 5 - Main Theme Wireless Networks. Dr. Jean-Claude Franchitti

Data Communication & Networks G Session 5 - Main Theme Wireless Networks. Dr. Jean-Claude Franchitti Data Communication & Networks G22.2262-001 Session 5 - Main Theme Wireless Networks Dr. Jean-Claude Franchitti New York University Computer Science Department Courant Institute of Mathematical Sciences

More information

Elements of a wireless network. Elements of a wireless network. Characteristics of selected wireless link standards. Elements of a wireless network

Elements of a wireless network. Elements of a wireless network. Characteristics of selected wireless link standards. Elements of a wireless network wireless hosts laptop, D, I phone run applications may be stationary (non-mobile) or mobile wireless does not always mean mobility base station typically connected to wired relay - responsible for sending

More information

Elements of a wireless network. Elements of a wireless network. Some wireless link standards. Elements of a wireless network

Elements of a wireless network. Elements of a wireless network. Some wireless link standards. Elements of a wireless network Elements of a wireless Elements of a wireless wireless hosts laptop, D, I phone run applications may be stationary (non-mobile) or mobile wireless does not always mean mobility base station typically connected

More information

Topic 2b Wireless MAC. Chapter 7. Wireless and Mobile Networks. Computer Networking: A Top Down Approach

Topic 2b Wireless MAC. Chapter 7. Wireless and Mobile Networks. Computer Networking: A Top Down Approach Topic 2b Wireless MAC Chapter 7 Wireless and Mobile Networks Computer Networking: A Top Down Approach 7 th edition Jim Kurose, Keith Ross Pearson/Addison Wesley April 2016 7-1 Ch. 7: Background: # wireless

More information

Mohammad Hossein Manshaei 1393

Mohammad Hossein Manshaei 1393 Mohammad Hossein Manshaei manshaei@gmail.com 1393 Wireless Links, WiFi, Cellular Internet Access, and Mobility Slides derived from those available on the Web site of the book Computer Networking, by Kurose

More information

Shared Access Networks Wireless. 1/27/14 CS mywireless 1

Shared Access Networks Wireless. 1/27/14 CS mywireless 1 Shared Access Networks Wireless 1 Wireless and Mobile Networks Background: # wireless (mobile) phone subscribers now exceeds # wired phone subscribers (5-to-1)! # wireless Internet-connected devices equals

More information

CS 332 Computer Networks Wireless Networks

CS 332 Computer Networks Wireless Networks CS 332 Computer Networks Wireless Networks Professor Szajda Chapter 6: Wireless and Mobile Networks Background: # wireless (mobile) phone subscribers now exceeds # wired phone subscribers! computer nets:

More information

CPSC 826 Internetworking. Wireless and Mobile Networks. Wireless Networks Wireless Hosts

CPSC 826 Internetworking. Wireless and Mobile Networks. Wireless Networks Wireless Hosts 1 CPSC 826 Intering Wireless and Mobile Networks Michele Weigle Department of Computer Science Clemson University mweigle@cs.clemson.edu November 29, 200 Wireless and Mobile Networks Background Number

More information

6.9 Summary. 11/20/2013 Wireless and Mobile Networks (SSL) 6-1. Characteristics of selected wireless link standards a, g point-to-point

6.9 Summary. 11/20/2013 Wireless and Mobile Networks (SSL) 6-1. Characteristics of selected wireless link standards a, g point-to-point Chapter 6 outline 6.1 Introduction Wireless 6.2 Wireless links, characteristics CDMA 6.3 IEEE 802.11 wireless LANs ( wi-fi ) 6.4 Cellular Internet Access architecture standards (e.g., GSM) Mobility 6.5

More information

COMP 3331/9331: Computer Networks and Applications

COMP 3331/9331: Computer Networks and Applications COMP 3331/9331: Computer Networks and Applications Week 10 Wireless Networks Reading Guide: Chapter 6: 6.1 6.3 Wireless Networks + Security 1 Wireless and Mobile Networks Background: # wireless (mobile)

More information

CSCI-1680 Wireless Chen Avin

CSCI-1680 Wireless Chen Avin CSCI-1680 Wireless Chen Avin Based on slides from Computer Networking: A Top Down Approach - 6th edition Administrivia TCP is due on Friday Final Project is out (fun, two weeks) Wireless and Mobile Networks

More information

Wireless Networks. CSE 3461: Introduction to Computer Networking Reading: , Kurose and Ross ( 6th ed.); , Kurose and Ross (7th ed.

Wireless Networks. CSE 3461: Introduction to Computer Networking Reading: , Kurose and Ross ( 6th ed.); , Kurose and Ross (7th ed. Wireless Networks CSE 3461: Introduction to Computer Networking Reading: 6.1 6.3, Kurose and Ross ( 6th ed.); 7.1 7.3, Kurose and Ross (7th ed.) 1 Questions How do you use wireless network technology in

More information

COMP 3331/9331: Computer Networks and Applications

COMP 3331/9331: Computer Networks and Applications COMP 3331/9331: Computer Networks and Applications Week 10 Reading Guide: Chapter 6: 6.1 6.4 1 Ch. 6: Wireless and Mobile Networks Background: v # wireless (mobile) phone subscribers now exceeds # wired

More information

ECE 4450:427/527 - Computer Networks Spring 2017

ECE 4450:427/527 - Computer Networks Spring 2017 ECE 4450:427/527 - Computer Networks Spring 2017 Dr. Nghi Tran Department of Electrical & Computer Engineering Lecture 5.6: Wireless Networks - MAC Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527

More information

Multiple Access in Cellular and Systems

Multiple Access in Cellular and Systems Multiple Access in Cellular and 802.11 Systems 1 GSM The total bandwidth is divided into many narrowband channels. (200 khz in GSM) Users are given time slots in a narrowband channel (8 users) A channel

More information

Last Lecture: Data Link Layer

Last Lecture: Data Link Layer Last Lecture: Data Link Layer 1. Design goals and issues 2. (More on) Error Control and Detection 3. Multiple Access Control (MAC) 4. Ethernet, LAN Addresses and ARP 5. Hubs, Bridges, Switches 6. Wireless

More information

Module 6: Wireless Mobile Networks

Module 6: Wireless Mobile Networks Module 6: Wireless Mobile Networks SMD123 Computer Communications Kaustubh Phanse Department of Computer Science and Electrical Engineering Luleå University of Technology Lecture Objectives Wireless links

More information

M06:Wireless and Mobile Networks. Corinna Schmitt

M06:Wireless and Mobile Networks. Corinna Schmitt M06:Wireless and Mobile Networks Corinna Schmitt corinna.schmitt@unibas.ch Acknowledgement 2016 M06 2 Background q # wireless (mobile) phone subscribers now exceeds # wired phone subscribers (5-to-1)!

More information

Home Area Networks. Outline

Home Area Networks. Outline Home Area Networks CS 687 University of Kentucky Fall 2015 Acknowledgment: Some slides are adapted from the slides distributed with the book Computer Networking: A Top Down Approach, 5th edition. Jim Kurose,

More information

Announcements: ECE/CS 372 introduction to computer networks. Assign 4 is due this Thursday Lab 4 is due next Tuesday Assignment 5 posted soon

Announcements: ECE/CS 372 introduction to computer networks. Assign 4 is due this Thursday Lab 4 is due next Tuesday Assignment 5 posted soon ECE/CS 372 introduction to computer networks Lecture 14 Announcements: Assign 4 is due this Thursday Lab 4 is due next Tuesday Assignment 5 posted soon Credit for lecture slides to Professor Bechir Hamdaoui

More information

Computer Networks. Wireless and Mobile Networks. László Böszörményi Computer Networks Mobile - 1

Computer Networks. Wireless and Mobile Networks. László Böszörményi Computer Networks Mobile - 1 Computer Networks Wireless and Mobile Networks László Böszörményi Computer Networks Mobile - 1 Background Number of wireless (mobile) phone subscribers now exceeds number of wired phone subscribers! Computer

More information

Link Layer. 5.1 Introduction and services 5.2 Error detection and correction 5.3Multiple access protocols 5.4 Link-Layer Addressing 5.

Link Layer. 5.1 Introduction and services 5.2 Error detection and correction 5.3Multiple access protocols 5.4 Link-Layer Addressing 5. Link Layer 5.1 Introduction and services 5.2 Error detection and correction 5.3Multiple access protocols 5.4 Link-Layer Addressing 5.5 Ethernet 5.6 Link-layer switches 5.7 PPP 5.8 Link Virtualization:

More information

CSC 8560 Computer Networks: Wireless and Mobility

CSC 8560 Computer Networks: Wireless and Mobility CSC 8560 Computer Networks: Wireless and Mobility Professor Henry Carter Fall 2017 Chapter 7: Wireless and Mobile Networks Background: # wireless (mobile) phone subscribers now exceeds # wired phone subscribers!

More information

Chapter 6 Wireless and Mobile Networks

Chapter 6 Wireless and Mobile Networks Chapter 6 Wireless and Mobile Networks A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you can add,

More information

Mobile devices for wireless

Mobile devices for wireless Mobile devices for wireless Wireless sensors Limited proc. power Small battery Laptop functionally eq. to desktop standard applications TDTS04/09 Föreläsning 0/6: WLAN och TCP i trådlösa nät RFID tag A

More information

MULTIPLE ACCESS PROTOCOLS 2. 1

MULTIPLE ACCESS PROTOCOLS 2. 1 MULTIPLE ACCESS PROTOCOLS AND WIFI 1 MULTIPLE ACCESS PROTOCOLS 2. 1 MULTIPLE ACCESS LINKS, PROTOCOLS Two types of links : point-to-point broadcast (shared wire or medium) POINT-TO-POINT PPP for dial-up

More information

Wireless and WiFi. Daniel Zappala. CS 460 Computer Networking Brigham Young University

Wireless and WiFi. Daniel Zappala. CS 460 Computer Networking Brigham Young University Wireless and WiFi Daniel Zappala CS 460 Computer Networking Brigham Young University Wireless Networks 2/28 mobile phone subscribers now outnumber wired phone subscribers similar trend likely with Internet

More information

Mobile and Sensor Systems

Mobile and Sensor Systems Mobile and Sensor Systems Lecture 2: Mobile Medium Access Control Protocols and Wireless Systems Dr Cecilia Mascolo In this lecture We will describe medium access control protocols and wireless systems

More information

Announcements: ECE/CS 372 introduction to computer networks. Assignment 4 due now. Chapter 7

Announcements: ECE/CS 372 introduction to computer networks. Assignment 4 due now. Chapter 7 ECE/CS 372 introduction to computer networks Announcements: Assignment 4 due now Chapter 7 Acknowledgement: slides drawn heavily from Kurose & Ross and Prof. Bechir Hamdaoui Chapter 7, slide 1 Wireless

More information

Wireless and Mobile Networks

Wireless and Mobile Networks Wireless and Mobile Networks Raj Jain Washington University in Saint Louis Saint Louis, MO 63130 Jain@wustl.edu Audio/Video recordings of this lecture are available on-line at: http://www.cse.wustl.edu/~jain/cse473-11/

More information

Medium Access Control

Medium Access Control Medium Access Control All material copyright 1996-2009 J.F Kurose and K.W. Ross, All Rights Reserved 5: DataLink Layer 5-1 Link Layer Introduction and services Multiple access protocols Ethernet Wireless

More information

Chapter 6 Wireless and Mobile Networks

Chapter 6 Wireless and Mobile Networks Chapter 6 Wireless and Mobile Networks A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you see the animations;

More information

Chapter 6 Wireless and Mobile Networks

Chapter 6 Wireless and Mobile Networks Chapter 6 Wireless and Mobile Networks A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you see the animations;

More information

Multiple Access Links and Protocols

Multiple Access Links and Protocols Multiple Access Links and Protocols Two types of links : point-to-point PPP for dial-up access point-to-point link between Ethernet switch and host broadcast (shared wire or medium) old-fashioned Ethernet

More information

Chapter 5 Wireless and Mobile Networks

Chapter 5 Wireless and Mobile Networks Chapter 5 Wireless and Mobile Networks Reference: Computer Networking: A Top Down Approach 4 th edition. Jim Kurose, Keith Ross Addison-Wesley, July 2007. Wireless and Mobile Networks Chapter 5: Wireless

More information

Computer Networks 1 (Mạng Máy Tính 1) Lectured by: Dr. Phạm Trần Vũ

Computer Networks 1 (Mạng Máy Tính 1) Lectured by: Dr. Phạm Trần Vũ Computer Networks 1 (Mạng Máy Tính 1) Lectured by: Dr. Phạm Trần Vũ Chapter 6 Wireless and Mobile Networks Computer Networking: A Top Down Approach, 5 th edition. Jim Kurose, Keith Ross Addison-Wesley,

More information

CSCD 433 Network Programming Fall Lecture 7 Ethernet and Wireless

CSCD 433 Network Programming Fall Lecture 7 Ethernet and Wireless CSCD 433 Network Programming Fall 2016 Lecture 7 Ethernet and Wireless 802.11 1 Topics 802 Standard MAC and LLC Sublayers Review of MAC in Ethernet MAC in 802.11 Wireless 2 IEEE Standards In 1985, Computer

More information

Chapter 6 Wireless and Mobile Networks. Chapter 6 outline. Chapter 6: Wireless and Mobile Networks. Elements of a wireless network

Chapter 6 Wireless and Mobile Networks. Chapter 6 outline. Chapter 6: Wireless and Mobile Networks. Elements of a wireless network Chapter 6 Wireless and Mobile Networks A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you can add,

More information

Chapter 6 Wireless and Mobile Networks

Chapter 6 Wireless and Mobile Networks Chapter 6 Wireless and Mobile Networks A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you can add,

More information

Chapter 6 Wireless and Mobile Networks (Wireless and Mobility)

Chapter 6 Wireless and Mobile Networks (Wireless and Mobility) CSF645 Mobile Computing 行動計算 Chapter 6 Wireless and Mobile Networks (Wireless and Mobility) Computer Networking: A Top Down Approach 6 th edition, Jim Kurose, Keith Ross 吳俊興國立高雄大學資訊工程學系 outline 6.1 Introduction

More information

Chapter 6 Wireless and Mobile Networks

Chapter 6 Wireless and Mobile Networks Chapter 6 Wireless and Mobile Networks A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you can add,

More information

Wireless and Mobile Networks Reading: Sections 2.8 and 4.2.5

Wireless and Mobile Networks Reading: Sections 2.8 and 4.2.5 Wireless and Mobile Networks Reading: Sections 2.8 and 4.2.5 Acknowledgments: Lecture slides are from Computer networks course thought by Jennifer Rexford at Princeton University. When slides are obtained

More information

Wireless and Mobile Networks

Wireless and Mobile Networks Chapter 6 Wireless and Mobile Networks A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you can add,

More information

Wireless Internet Routing. Review of Wireless Networking (with Routing in Mind)

Wireless Internet Routing. Review of Wireless Networking (with Routing in Mind) Wireless Internet Routing Review of Wireless Networking (with Routing in Mind) 1 Review of Wireless Networking Architecture of wireless networks Wireless PHY Wireless MAC o 802.11 PHY: physical layer /

More information

Chapter 7. Wireless and Mobile Networks. Computer Networking: A Top Down Approach

Chapter 7. Wireless and Mobile Networks. Computer Networking: A Top Down Approach Chapter 7 Wireless and Mobile Networks A note on the use of these Powerpoint slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you see

More information

Chapter 6 Wireless and Mobile Networks

Chapter 6 Wireless and Mobile Networks Chapter 6 Wireless and Mobile Networks A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you can add,

More information

Data Link Layer: Multi Access Protocols

Data Link Layer: Multi Access Protocols Digital Communication in the Modern World Data Link Layer: Multi Access Protocols http://www.cs.huji.ac.il/~com1 com1@cs.huji.ac.il Some of the slides have been borrowed from: Computer Networking: A Top

More information

Last time?! MPLS! Label distribution protocols! Multi Protocol Label Switching! Layer 2.5 protocol! LDP! RSVP!

Last time?! MPLS! Label distribution protocols! Multi Protocol Label Switching! Layer 2.5 protocol! LDP! RSVP! Part2: SDNs Last time? MPLS Multi Protocol Label Switching Layer 2.5 protocol Label distribution protocols LDP RSVP Per router control plane Individual routing algorithm components in each and every router

More information

Chapter 7. Wireless and Mobile Networks. Computer Networking: A Top Down Approach. Andrei Gurtov

Chapter 7. Wireless and Mobile Networks. Computer Networking: A Top Down Approach. Andrei Gurtov Chapter 7 Wireless and Mobile Networks Andrei Gurtov All material copyright 1996-2016 J.F Kurose and K.W. Ross, All Rights Reserved Computer Networking: A Top Down Approach 7 th edition Jim Kurose, Keith

More information

Chapter 3: Wireless and Mobile Networks

Chapter 3: Wireless and Mobile Networks Computer Network Architectures and Multimedia Guy Leduc Chapter 3 Wireless and Mobile Networks Chapter 7 of Computer Networking: A Top Down Approach, 7 th edition. Jim Kurose, Keith Ross Addison-Wesley,

More information

Chapter 6 Wireless and Mobile Networks

Chapter 6 Wireless and Mobile Networks Chapter 6 Wireless and Mobile Networks A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you can add,

More information

Block 3: Lecture 1! Part 3: Lecture 1! Wireless networks!

Block 3: Lecture 1! Part 3: Lecture 1! Wireless networks! Block 3: Lecture 1 Part 3: Lecture 1 Wireless networks Part 3 Wireless and mobile networks: 1. Wireless technologies 2. Mobility 3. Fiber day on Friday May 22nd Long time ago... Marconi invented the wireless

More information

Extending or Interconnecting LANS. Physical LAN segment. Virtual LAN. Forwarding Algorithm 11/9/15. segments. VLAN2, Port3. VLAN1, Port1.

Extending or Interconnecting LANS. Physical LAN segment. Virtual LAN. Forwarding Algorithm 11/9/15. segments. VLAN2, Port3. VLAN1, Port1. Physical LAN segment q Hosts connected on the same physical LAN segment q Same subnet; L2 forwarding q ARP (IPè MAC) L2 frame (S, D), send q Scale? Extending or Interconnecting LANS q q q Why not just

More information

Lecture 6. Reminder: Homework 2, Programming Project 2 due on Thursday. Questions? Tuesday, September 13 CS 475 Networks - Lecture 6 1

Lecture 6. Reminder: Homework 2, Programming Project 2 due on Thursday. Questions? Tuesday, September 13 CS 475 Networks - Lecture 6 1 Lecture 6 Reminder: Homework 2, Programming Project 2 due on Thursday. Questions? Tuesday, September 13 CS 475 Networks - Lecture 6 1 Outline Chapter 2 - Getting Connected 2.1 Perspectives on Connecting

More information

(Wireless) Internet Routing. Review of Wireless Networking (with Routing in Mind)

(Wireless) Internet Routing. Review of Wireless Networking (with Routing in Mind) (Wireless) Internet Routing Review of Wireless Networking (with Routing in Mind) 1 Review of Wireless Networking Architecture of wireless networks Wireless PHY Wireless MAC o 802.11 PHY: physical layer

More information

Ethernet. Lecture 6. Outline. Ethernet - Physical Properties. Ethernet - Physical Properties. Ethernet

Ethernet. Lecture 6. Outline. Ethernet - Physical Properties. Ethernet - Physical Properties. Ethernet Lecture 6 Ethernet Reminder: Homework 2, Programming Project 2 due on 9/20/12. Thick-net Thin-net Twisted Pair Thursday, September 13 CS 475 Networks - Lecture 6 1 Thursday, September 13 CS 475 Networks

More information

Chapter 7. Wireless and Mobile Networks 7-1

Chapter 7. Wireless and Mobile Networks 7-1 Chapter 7 Wireless and Mobile Networks A note on the use of these Powerpoint slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you see

More information

Communication Networks: Wireless and Mobile Communication Networks. Prof. Amir Herzberg BIU, Dept. of CS

Communication Networks: Wireless and Mobile Communication Networks. Prof. Amir Herzberg BIU, Dept. of CS 89-850 Communication Networks: Wireless and Mobile Communication Networks Prof. Amir Herzberg BIU, Dept. of CS From ch.6 of Kurose and Ross, 3 rd edition; and [KMK], ch. 8. All material copyright 1996-2004

More information

Chapter 7. Wireless and Mobile Networks. Computer Networking: A Top Down Approach

Chapter 7. Wireless and Mobile Networks. Computer Networking: A Top Down Approach Chapter 7 Wireless and Mobile Networks A note on the use of these Powerpoint slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you see

More information

Chapter 6 Wireless and Mobile Networks

Chapter 6 Wireless and Mobile Networks Chapter 6 Wireless and Mobile Networks A note on the use of these ppt slides: The notes used in this course are substantially based on powerpoint slides developed and copyrighted by J.F. Kurose and K.W.

More information

Lecture 15 Wireless and Mobility

Lecture 15 Wireless and Mobility Lecture 15 Wireless and Mobility From Kurose & Ross Book slightly modified by Romaric Duvignau duvignau@chalmers.se Thanks and enjoy! JFK/KWR All material copyright 1996-2016 J.F Kurose and K.W. Ross,

More information

Lecture Objectives. Lecture and Bluetooth technology. Agenda. IEEE b. Characteristics. Center Frequencies

Lecture Objectives. Lecture and Bluetooth technology. Agenda. IEEE b. Characteristics. Center Frequencies Lecture Objectives Wireless Networks and obile ystems Lecture 2 802.11 and Bluetooth technology Discuss the operation of IEEE 802.11 and Bluetooth WLANs/WANs ummarize standardization efforts and recommendations

More information

Wireless and Mobile Networks

Wireless and Mobile Networks Wireless and Mobile Networks Background: # wireless (mobile) phone subscribers now exceeds # wired phone subscribers (5-to-1)! # wireless Internet-connected devices equals # wireline Internet-connected

More information

CSC 498R: Internet of Things 2

CSC 498R: Internet of Things 2 CSC 498R: Internet of Things Lecture 04: Wireless Networks Instructor: Haidar M. Harmanani IoT Components Things we connect: Hardware, sensors and actuators Connectivity Medium we use to connect things

More information

Wireless Networks. Wireless Links. Mike Freedman hap:// Interference / bit errors

Wireless Networks. Wireless Links. Mike Freedman hap://  Interference / bit errors 1! Widespread Deployment 2! Wireless Networks COS 461: Computer Networks Spring 2013 Mike Freedman hap://www.cs.princeton.edu/courses/archive/spring13/cos461/ Worldwide cellular subscribers 1993: 34 million

More information

3/20/2012. Data Communications & Networks. Session 5 Main Theme. 2 Wireless and Mobile Networks. Dr. Jean-Claude Franchitti

3/20/2012. Data Communications & Networks. Session 5 Main Theme. 2 Wireless and Mobile Networks. Dr. Jean-Claude Franchitti Data Communications & Networks Session 5 Main Theme Wireless and Mobile Networks Dr. Jean-Claude Franchitti New York University Computer Science Department Courant Institute of Mathematical Sciences Adapted

More information

Link layer, LANs: outline. Chapter 5-1 Link Layer. Link layer: introduction. Link layer services

Link layer, LANs: outline. Chapter 5-1 Link Layer. Link layer: introduction. Link layer services Chapter 5 Link Layer Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012 Link layer, LANs: outline 5.1 introduction, services 5.2 error detection, correction

More information

CMPE 257: Wireless and Mobile Networking

CMPE 257: Wireless and Mobile Networking CMPE 257: Wireless and Mobile Networking Katia Obraczka Computer Engineering UCSC Baskin Engineering Lecture 3 CMPE 257 Winter'11 1 Announcements Accessing secure part of the class Web page: User id: cmpe257.

More information

IEEE WLANs (WiFi) Part II/III System Overview and MAC Layer

IEEE WLANs (WiFi) Part II/III System Overview and MAC Layer IEEE 802.11 WLANs (WiFi) Part II/III System Overview and MAC Layer Design goals for wireless LANs (WLANs) Global, seamless operation Low power for battery use No special permissions or licenses needed

More information

Getting Connected (Chapter 2 Part 4) Networking CS 3470, Section 1 Sarah Diesburg

Getting Connected (Chapter 2 Part 4) Networking CS 3470, Section 1 Sarah Diesburg Getting Connected (Chapter 2 Part 4) Networking CS 3470, Section 1 Sarah Diesburg Five Problems Encoding/decoding Framing Error Detection Error Correction Media Access Five Problems Encoding/decoding Framing

More information

CS118 Discussion 1A, Week 9. Zengwen Yuan Dodd Hall 78, Friday 10:00 11:50 a.m.

CS118 Discussion 1A, Week 9. Zengwen Yuan Dodd Hall 78, Friday 10:00 11:50 a.m. CS118 Discussion 1A, Week 9 Zengwen Yuan Dodd Hall 78, Friday 10:00 11:50 a.m. 1 Outline Wireless: 802.11 Mobile IP Cellular Networks: LTE Sample final 2 Wireless and Mobile Network Wireless access: WIFI

More information

Wireless Challenges : Computer Networking. Overview. Routing to Mobile Nodes. Lecture 25: Wireless Networking

Wireless Challenges : Computer Networking. Overview. Routing to Mobile Nodes. Lecture 25: Wireless Networking Wireless Challenges 15-441: Computer Networking Lecture 25: Wireless Networking Force us to rethink many assumptions Need to share airwaves rather than wire Don t know what hosts are involved Host may

More information

Multiple Access Links and Protocols

Multiple Access Links and Protocols Multiple Access Links and Protocols Two types of links : point-to-point PPP for dial-up access point-to-point link between Ethernet switch and host broadcast (shared wire or medium) old-fashioned Ethernet

More information

Chapter 5 Link Layer and LANs

Chapter 5 Link Layer and LANs Chapter 5 Link Layer and LANs A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you can add, modify, and

More information

Data Link Protocols. TCP/IP Suite and OSI Reference Model. The TCP/IP protocol stack does not define the lower layers of a complete protocol stack

Data Link Protocols. TCP/IP Suite and OSI Reference Model. The TCP/IP protocol stack does not define the lower layers of a complete protocol stack Data Link Protocols TCP/IP Suite and OSI Reference Model The TCP/IP protocol stack does not define the lower layers of a complete protocol stack In this lecture, we will address how the TCP/IP protocol

More information

Lecture 23 Overview. Last Lecture. This Lecture. Next Lecture ADSL, ATM. Wireless Technologies (1) Source: chapters 6.2, 15

Lecture 23 Overview. Last Lecture. This Lecture. Next Lecture ADSL, ATM. Wireless Technologies (1) Source: chapters 6.2, 15 Lecture 23 Overview Last Lecture ADSL, ATM This Lecture Wireless Technologies (1) Wireless LAN, CSMA/CA, Bluetooth Source: chapters 6.2, 15 Next Lecture Wireless Technologies (2) Source: chapter 16, 19.3

More information

Wireless networks. Wireless Network Taxonomy

Wireless networks. Wireless Network Taxonomy Wireless networks two components to be considered in deploying applications and protocols wireless links ; mobile computing they are NOT the same thing! wireless vs. wired links lower bandwidth; higher

More information

CMPE 257: Wireless and Mobile Networking

CMPE 257: Wireless and Mobile Networking CMPE 257: Wireless and Mobile Networking Katia Obraczka Computer Engineering UCSC Baskin Engineering Lecture 3 CMPE 257 Spring'15 1 Next week Announcements April 14: ICN (Spencer Sevilla) April 16: DTN

More information

Chapter 6 Medium Access Control Protocols and Local Area Networks

Chapter 6 Medium Access Control Protocols and Local Area Networks Chapter 6 Medium Access Control Protocols and Local Area Networks 802.11 Wireless LAN CSE 3213, Winter 2010 Instructor: Foroohar Foroozan Wireless Data Communications Wireless communications compelling

More information

Already finished all layers in the stack, why a separate chapter for wireless and mobile networks?

Already finished all layers in the stack, why a separate chapter for wireless and mobile networks? Wireless and Mobile Networks Yanmin Zhu Department of Computer Science and Engineering Mobile lobal ISP Home Regional ISP Institutional Already finished all layers in the stack, why a separate chapter

More information

CS 43: Computer Networks Media Access. Kevin Webb Swarthmore College November 30, 2017

CS 43: Computer Networks Media Access. Kevin Webb Swarthmore College November 30, 2017 CS 43: Computer Networks Media Access Kevin Webb Swarthmore College November 30, 2017 Multiple Access Links & Protocols Two classes of links : point-to-point dial-up access link between Ethernet switch,

More information

Wireless Security Background

Wireless Security Background Wireless Security Background Wireless Networks The need for mobile computing Laptops, PDAs, Bluetooth devices Smart phones Enabling technology Wireless communication Two important characteristics Wireless

More information

Wireless LANs. ITS 413 Internet Technologies and Applications

Wireless LANs. ITS 413 Internet Technologies and Applications Wireless LANs ITS 413 Internet Technologies and Applications Aim: Aim and Contents Understand how IEEE 802.11 wireless LANs work Understand what influences the performance of wireless LANs Contents: IEEE

More information

Lecture 6. Data Link Layer (cont d) Data Link Layer 1-1

Lecture 6. Data Link Layer (cont d) Data Link Layer 1-1 Lecture 6 Data Link Layer (cont d) Data Link Layer 1-1 Agenda Continue the Data Link Layer Multiple Access Links and Protocols Addressing Data Link Layer 1-2 Multiple Access Links and Protocols Two types

More information

CS 43: Computer Networks. 27: Media Access Contd. December 3, 2018

CS 43: Computer Networks. 27: Media Access Contd. December 3, 2018 CS 43: Computer Networks 27: Media Access Contd. December 3, 2018 Last Class The link layer provides lots of functionality: addressing, framing, media access, error checking could be used independently

More information

Wireless Protocols. Training materials for wireless trainers

Wireless Protocols. Training materials for wireless trainers Wireless Protocols Training materials for wireless trainers Goals The goal of this lecture is to introduce: IEEE wireless protocols coverage 802.11 radio protocols terminology WiFi modes of operation details

More information

MSIT 413: Wireless Technologies Week 8

MSIT 413: Wireless Technologies Week 8 MSIT 413: Wireless Technologies Week 8 Michael L. Honig Department of EECS Northwestern University November 2017 The Multiple Access Problem How can multiple mobiles access (communicate with) the same

More information

Wireless Local Area Networks. Networks: Wireless LANs 1

Wireless Local Area Networks. Networks: Wireless LANs 1 Wireless Local Area Networks Networks: Wireless LANs 1 Wireless Local Area Networks The proliferation of laptop computers and other mobile devices (PDAs and cell phones) created an obvious application

More information

Link Layer and Ethernet

Link Layer and Ethernet Link Layer and Ethernet 14-740: Fundamentals of Computer Networks Bill Nace Material from Computer Networking: A Top Down Approach, 6 th edition. J.F. Kurose and K.W. Ross traceroute Data Link Layer Multiple

More information

15-441: Computer Networking. Wireless Networking

15-441: Computer Networking. Wireless Networking 15-441: Computer Networking Wireless Networking Outline Wireless Challenges 802.11 Overview Link Layer Ad-hoc Networks 2 Assumptions made in Internet Host are (mostly) stationary Address assignment, routing

More information

Data and Computer Communications. Chapter 13 Wireless LANs

Data and Computer Communications. Chapter 13 Wireless LANs Data and Computer Communications Chapter 13 Wireless LANs Wireless LAN Topology Infrastructure LAN Connect to stations on wired LAN and in other cells May do automatic handoff Ad hoc LAN No hub Peer-to-peer

More information

CC451 Computer Networks

CC451 Computer Networks CC451 Computer Networks Lecture 9 Link Layer 5: DataLink Layer 5-1 Chapter 5 Link Layer and LANs A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students,

More information

Lecture 16: QoS and "

Lecture 16: QoS and Lecture 16: QoS and 802.11" CSE 123: Computer Networks Alex C. Snoeren HW 4 due now! Lecture 16 Overview" Network-wide QoS IntServ DifServ 802.11 Wireless CSMA/CA Hidden Terminals RTS/CTS CSE 123 Lecture

More information

Link Layer and Ethernet

Link Layer and Ethernet Link Layer and Ethernet 14-740: Fundamentals of Computer Networks Bill Nace Material from Computer Networking: A Top Down Approach, 6 th edition. J.F. Kurose and K.W. Ross traceroute Data Link Layer Multiple

More information

Wireless Communication and Networking CMPT 371

Wireless Communication and Networking CMPT 371 Wireless Communication and Networking CMPT 371 Wireless Systems: AM, FM Radio TV Broadcast Satellite Broadcast 2-way Radios Cordless Phones Satellite Links Mobile Telephony Systems Wireless Local Loop

More information