content delivery in ad hoc wireless networks
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Content Delivery in Ad Hoc Wireless Networks. Wyatt Brenneman Taylor McKecknie Prashanth Yanamandra. Senior Design December 2010. TEAM. Adviser : Dr. Lei Ying Research Assistant: Ming Ouyang Team Members: Prashanth Yanamandra Wyatt Brenneman Taylor McKechnie

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content delivery in ad hoc wireless networks
Content Delivery in Ad Hoc Wireless Networks

Wyatt Brenneman

Taylor McKecknie

PrashanthYanamandra

Senior Design December 2010

slide2
TEAM
  • Adviser : Dr. Lei Ying
  • Research Assistant: Ming Ouyang
  • Team Members:
    • Prashanth Yanamandra
    • Wyatt Brenneman
    • Taylor McKechnie
  • Client: ECpE Department Iowa State University Ames, IA, 50010
problem statement
Problem Statement
  • In this project we will be developing content delivery protocols for ad hoc wireless networks.
  • Our team will be responsible to design and implement protocol-stacks (from physical layer to application layer) on the software define radio platform including GNU radio and USRP.
functional requirements
Functional Requirements

Video Streaming at 10 fps for a 320 * 240 screen.

Number of users: Up to 10 simultaneously streams

Maximum Bandwidth - 8MHz for USRP and 20 MHz for USRP2

Broadcast Range - 100 ft indoors

non functional requirements
Non-Functional Requirements

Indoor placement of sensors and USRP devices

Energy consumption of system

Dimensions of USRPs and sensors

USRP dimensions: 8.25’’ x 6.5” x 2”

assumptions
Assumptions

Minimum data rate at all time

Minimum user access

Users are within the range of sensors

Indoor network

Laptop and USRP in same location

hardware constraints
Hardware Constraints
  • USRP
    • ADC – 64 Ms/s at 12-bits
    • DAC – 128 Ms/s at 14-bits
  • USRP2
    • ADC – 100 Ms/s at 14-bits
    • DAC – 400 Ms/s at 16-bits
hardware constraints1
Hardware Constraints
  • VERT2450 Antenna
    • Dual band 2.4 – 2.8 GHz and 4.9 – 5.9 GHz
  • RFX2400 Transceiver Daughterboard
    • 50mW (17dBm) Transmitting Power
    • 2.3 – 2.9 GHz Band
    • 30 MHz Transmit and Receive Bandwidth
market survey
Market Survey
  • Networking using USRPs
    • Developing the protocol stacks
  • Educational and Research Tool
    • Software can be easily manipulated
    • Allows new ideas to be tested
risks and mitigation
Risks and Mitigation
  • Easily available sensors to replace
  • Device and sensor overlap
  • Sensor failures
  • Packet Loss during Tx
  • Device Failure
project milestones
Project Milestones

March 3, 2010: Project plan is due

April 16, 2010: Communication between USRPs in the same room

April 26, 2010: Design Document is due

April 27, 2010: Design Committee review

September 3, 2010: Communication between USRPs and Sensors

September 24, 2010: Initial phase of Testing

October 2010: Test-Break-Fix

November/ December 2010: Final Testing and Documentation/ Presentation

detailed design usrp
Detailed design – USRP
  • USRP & USRP 2
    • VERT 2400 Antenna
    • RFX2400 Transceiver Daughterboard
    • Analog to Digital
      • 64 Ms/s 12-bit (USRP)
      • 100 Ms/s 14-bit (USRP2)
    • Digital to Analog
      • 128 Ms/s 14-bit (USRP)
      • 400 Ms/s 16-bit (USRP2)
    • FPGA
    • USB / Ethernet Port
detailed design gnu radio
Detailed design – GNU Radio
  • OFDM signaling scheme
    • GNU radio is an open-source project and there are several related projects that we will be able to utilize
  • Signal processing blocks are programmed in C++
  • Processing blocks are connected with Python to form a communication system
test plan
Test plan
  • Send and receive data packets between USRPs and the sensors.
  • Test delay, bit error rate, Tx/Rx data rate
  • Test Cases
    • Communication between USRPs
      • Same room
      • Neighboring rooms
      • Same floor level
      • Different floors
      • Extending to entire building.
prototype and results
Prototype and results
  • General test of an OFDM Tx and Rx
  • Transmission of data packets at 2.4 GHz between USRPs
progress
Progress
  • Completed progress
    • Setting up USRPs and GNU radio software
    • Design plan
    • Learning interfaces and programming languages
work division
Work Division

Completed Work

next semester plan
Next Semester Plan
  • Future
    • Ordering and setting up sensors
    • Implementing the design plan
    • Testing design plan
work division1
Work Division

Future Projections

questions
Questions?
  • Thank You all for coming
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