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


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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