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Wireless Network

Wireless Network. Course Objectives: Students will try to: 1 Understand the fundamentals of wireless networks. 2 Learn and analyze the different wireless technologies. Evaluate Ad-hoc networks and wireless sensor networks.

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Wireless Network

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  1. Wireless Network • Course Objectives: Students will try to: • 1 Understand the fundamentals of wireless networks. • 2 Learn and analyze the different wireless technologies. Evaluate Ad-hoc networks and wireless sensor networks. • 3. Understand and evaluate emerging wireless technologies and standards . Understand design considerations for wireless networks • 4. Learn and analyze and evaluate the security threats and related security standards

  2. Course Outcomes: Students will be able to: • 1. Explain the basic concepts of wireless network and wireless generations. • 2. Demonstrate the different wireless technologies and appraise the importance of Ad-hoc and Wireless Sensor networks. • 3. Describe and judge the emerging wireless technologies standards and explain the design considerations for deploying the wireless network infrastructure. • 4. Differentiate and support the security measures, standards. Services and layer wise security considerations. • Prerequisite: Computer Networks.

  3. Syllabus • 0 Prerequisite Modulation and Demodulation Techniques, PSTN -02 • I Fundamentals Wireless Communication • Fundamentals of Wireless Communication, Advantages, limitations and application, wireless media, Infrared Modulation Techniques, DSSS and FHSS, Frequency Spectrum: Radio and Infrared; Wireless generations: 1G: Cellular,2G: Mobile Radio,3G: UMTS- Security related Encryption Algorithm,4G -07CO1 • II Evolution of Wireless Technologies • Multiple Access Technique: TDMA, FDMA, CSMA, CDMA • Wireless Technologies: GSM, GPRS, EDGE,CDMA,LTE, UMTS -10CO1 CO2

  4. III Types of Wireless Networks • Ad-hoc: MANET & VANET, Application, Advantage and limitations; Wireless Sensor Network: Application, advantages and limitations 09 CO1 CO3 • IV Emerging Wireless Technologies and standards • WLL , WLAN- 802.11 (Wi-Fi), WPAN- 802.15.1/3/4 (Bluetooth, Zigbee), WMAN-802.16a (Wimax) , Wi-max and LTE /3GPP comparison, Mi-fi, Ly-fi, 10 CO1 CO2 CO4 • V Wireless Network Design Considerations • Wireless technology, Cisco Unified Wireless Network, Designing Wireless Networks with Lightweight Access Points and Wireless LAN Controllers • 07 CO1 CO2 CO3 CO4 CO5

  5. VI Wireless Network Security • The need, attacks, security serviced, WEP, Mobile IP, VPN( PPTP, LLTP, IPSec), Network Layer Security, Transport Layer Security, Email Security: PGP, S/ MIME, Internet Firewalls for Trusted System • 07 CO1 CO2 CO3 CO6 Text Books: • 1. Cellular Communications: A Comprehensive and Pratical Guide, Nishith Tripathi, Jeffery H Reed, Wiley 2. Wireless Mobile Internet Security, 2nd Edition, Man, Young Rhee, Wiley- IEEE press 3. Designing for Cisco Internetwork Solutions (DESGN), 2nd Edition, CCDA, Diane Teare, cisco Press. • References: • 1. Introduction to Digital mobile communication, 2nd Edition, Yoshihiko Akaiwa 2."Wireless Communications and networks", William Stallings,

  6. Sensor network lab • Lab Objectives: Students will try: • 1. To learn different types of sensors from Motes families. • 2. To design the problem solution as per the requirement analysis done using Motes sensors. • 3. To study the basic concepts of programming/sensors/ emulator like cooja etc. • 4. To design and implement the mini project intended solution for project based learning. • 5. To build and test the mini project successfully. • 6. To improve the team building, communication and management skills of the students

  7. Lab Outcomes: Student will be able to: • 1. Identify the requirements for the real world problems. • 2. Conduct a survey of several available literatures in the preferred field of study. • 3. Study and enhance software/ hardware skills. • 4. Demonstrate and build the project successfully by hardware/sensor requirements, coding, emulating and testing. • 5. To report and present the findings of the study conducted in the preferred domain • 6. Demonstrate an ability to work in teams and manage the conduct of the research study.

  8. Guidelines • 1. The mini project work is to be conducted by a group of three students • 2. Each group will be associated with a subject Incharge/ mini project mentor. The group should meet with the concerned faculty during Laboratory hours and the progress of work discussed must be documented. • 3. The students may do survey for different application using different types of sensors for their mini project. • 4. Each group will identify the Hardware (Motes from different Motes families) & sensor configuration and software requirement for their mini project problem statement. • 5. Design your own circuit board using multiple sensors etc. • 6. Installation, configure and manage your sensors in such away so that they can communicate with each other. • 7. Work with operating system, emulator like contiki cooja and do coding to for input devices on sensors. • 8. Create and interface using Mobile/Web to publish or remotely access the data on Internet.

  9. 9. Each group along with the concerned faculty shall identify a potential problem statement, on which the study and implementation is to be conducted. • 10. Each group may present their work in various project competitions and paper presentations. • 11. A detailed report is to be prepared as per guidelines given by the concerned faculty. • Text Books: • 1. Fundamentals of Sensor Network Programming: Applications and Technology, • By S. Sitharama Iyengar, Nandan Parameshwaran, Vir V. Phoha, N. Balakrishnan, Chuka D. Okoye, Wiley publication. • 2. Contiki Cooja User Guide. • References: • 1. Internet of Things (A Hands-on-Approach) , Vijay Madisetti , ArshdeepBahga • 2. A comparative review of wireless sensor network mote technologies, IEEE paper 2009 • Term Work: Term Work shall consist of full Mini Project on above guidelines/syllabus. • Also Term work Journal must include at least 2 assignments. • Term Work Marks: 25 Marks (Total marks) = 15 Marks (Mini Project) + 5 Marks (Assignments) + 5 Marks (Attendance) • Oral Exam: An Oral exam will be held based on the Mini Project and Presentation.

  10. PREREQUISITE

  11. Modulation • modulation = adding information (e.g. voice) to a carrier electromagnetic (radio) signal

  12. Frequency Modulation (FM).Amplitude Modulation (AM)

  13. Introduction to Wireless Communication

  14. What is Wireless Communication ? • Transmitting voice and data using electromagnetic waves in open space (atmosphere) • Electromagnetic waves • Travel at speed of light (c = 3x108 m/s) • Has a frequency (f) and wavelength (l) • c = f x l • Higher frequency means higher energy photons • The higher the energy photon the more penetrating is the radiation

  15. Types of wireless communication celullar wireless computer network radio service

  16. Electromagnetic radiation spectrum

  17. Wavelength of Some Technologies • GSM Phones: • frequency ~= 900 Mhz • wavelength ~= 33cm • 4G Phones • frequency ~= 1.8 Ghz • wavelength ~= 17.5 cm • Bluetooth: • frequency ~= 2.4GHz • wavelength ~= 12.5cm

  18. Types of electromagnetic carriers • when the distance between the sender and receiver is short (e.g. TV box and a remote control) infrared waves are used • for long range distances between sender and receiver (e.g. TV broadcasting and cellular service) both microwaves and radio waves are used. • radio waves are ideal when large areas need to be covered and obstacles exist in the transmission path. • microwaves are good when large areas need to be covered and no obstacles exist in the transmission path

  19. Wireless applications (services)

  20. Frequency Carries/Channels • The information from sender to receiver is carrier over a well defined frequency band. • This is called a channel • Each channel has a fixed frequency bandwidth (in KHz) and Capacity (bit-rate) • Different frequency bands (channels) can be used to transmit information in parallel and independently.

  21. Radio waves generation • when a high-frequency alternating current (AC) passes through a copper conductor it generates radio waves which are propagated into the air using an antena • radio waves have frequencies between: • 3 Hz – 300 KHz - low frequency • 300 KHz – 30 MHz – high frequency • 30 MHz – 300 MHz – very high frequency • 300 MHz – 300 GHz – ultra high frequency

  22. Radio propagation

  23. Radio propagation (2) • radio waves are generated by an antenna and they propagate in all directions as a straight line • radio waves travel at a velocity of 186.000 miles per second • radio waves become weaker as they travel a long distance

  24. Radio propagation (3) • there are 3 modes of propagation: • surface mode – for low frequency waves • direct mode – for high frequency waves • ionospheric mode – long distance high frequency waves

  25. Radio frequency interference

  26. Radio signal attenuation (path loss)

  27. Advantages and Disadvantages of wireless communication • advantages: • mobility • a wireless communication network is a solution in areas where cables are impossible to install (e.g. hazardous areas, long distances etc.) • easier to maintain • disadvantages: • has security vulnerabilities • high costs for setting the infrastructure • unlike wired comm., wireless comm. is influenced by physical obstructions, climatic conditions, interference from other wireless devices

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