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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 - PowerPoint PPT Presentation
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Senior Design December 2010Content Delivery in Ad Hoc Wireless Networks
Wyatt BrennemanTaylor McKecknie
Prashanth Yanamandra
TEAM Adviser : Dr. Lei Ying Research Assistant: Ming Ouyang Team Members:
Prashanth YanamandraWyatt BrennemanTaylor McKechnie
Client: ECpE Department Iowa State University Ames, IA, 50010
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.
Concept Sketch
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 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 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 USRP
ADC – 64 Ms/s at 12-bitsDAC – 128 Ms/s at 14-bits
USRP2ADC – 100 Ms/s at 14-bitsDAC – 400 Ms/s at 16-bits
Hardware Constraints VERT2450 Antenna
Dual band 2.4 – 2.8 GHz and 4.9 – 5.9 GHz RFX2400 Transceiver Daughterboard
50mW (17dBm) Transmitting Power2.3 – 2.9 GHz Band30 MHz Transmit and Receive Bandwidth
Market Survey Networking using USRPs
Developing the protocol stacks Educational and Research Tool
Software can be easily manipulatedAllows new ideas to be tested
Sensor failures Packet Loss during Tx Device Failure
Easily available sensors to replace
Device and sensor overlap
Risks and Mitigation
Cost EstimatesPRODUCT NUMBER OF
UNITSCOST/UNIT TOTAL
USRP (Only Kit) 2 $ 700 $ 1,400
USRP2 (Only Kit) 3 $ 1400 $ 4,200
Accessories (Daughter Board, Antennas)
5 $ 310 $ 1,550
LAPTOPS 5 $800 $4,000
SENSORS 25-50 $ 100 - $ 200 $ 2500 - $ 10,000
SD Cards & Card Readers
3 $ 20 $ 60
WORK HRS. 600 $20/Hour $12,000
TOTAL $ 25710 - $ 33210
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
System Decomposition
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 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 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 General test of an
OFDM Tx and Rx Transmission of data
packets at 2.4 GHz between USRPs
Progress Completed progress
Setting up USRPs and GNU radio softwareDesign planLearning interfaces and programming
languages
Work Division
Research Hardware Implementation
Software Design Documentation Total
Wyatt Brenneman 35 5 10 30 80
Taylor McKechnie 40 0 10 25 75
Prashanth Yanamandra
35 5 10 30 80
Total 105 10 30 90 215
Completed Work
Next Semester Plan Future
Ordering and setting up sensorsImplementing the design planTesting design plan
Work Division
Transmission Receiving Signal Processing
Testing Documentation Total
Wyatt Brenneman 50 20 10 50 30 160
Taylor McKechnie 10 10 60 50 30 160
Prashanth Yanamandra
20 50 10 50 30 160
Total 80 80 80 150 90 480
Future Projections
Questions? Thank You all for coming