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Improving Bluetooth EDR Data Throughput Using FEC and Interleaving

Improving Bluetooth EDR Data Throughput Using FEC and Interleaving. Ling-Jyh Chen * , Tony Sun**, Yung-Chih Chen* *Institute of Information Science, Academia Sinica **Dept. of Computer Science, UCLA. Introduction. Wireless communication is inherently vulnerable to errors.

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Improving Bluetooth EDR Data Throughput Using FEC and Interleaving

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  1. Improving Bluetooth EDR Data Throughput Using FEC and Interleaving Ling-Jyh Chen*, Tony Sun**, Yung-Chih Chen* *Institute of Information Science, Academia Sinica **Dept. of Computer Science, UCLA

  2. Introduction • Wireless communication is inherently vulnerable to errors. • Wireless channel errors are usually bursty and dependent in occurrences rather than independently/ identically distributed. • Some robust link layer transmission schemes are required.

  3. Contribution • We propose three link layer enhancements for Bluetooth v2.0 • Adaptive Packet Type (APT) • FEC coding • Interleaving FEC (IFEC) • The proposed solutions are applicable to other wireless technologies.

  4. Outline • Bluetooth Overview • Proposed Link Layer Enhancements • Simulation Results • Conclusion

  5. BluetoothOverview • The “enabler” of Personal Area Network (PAN) • Low power, low cost, and smaller chips

  6. Bluetooth packet types • DH: Stop and Wait ARQ • DM: ARQ as well as FEC codes • FEC coding scheme: • (15, 10) Shortened Hamming code • Able to correct single bit error in each block.

  7. Bluetooth Enhanced Data Rate (EDR) • EDR does not provide FEC enabled packet types (ie., no DM series types)

  8. Proposed Link Layer Enhancements • Adaptive Packet Type (APT) • FEC coding • Interleaving FEC (IFEC)

  9. Enhancement (I): APT • Adaptive Packet Type (APT) • Determine optimal packet type • T: Theoretical Data throughput s: packet size/bits b: bit error rate p: packet error rate n: packet length in Bluetooth slots

  10. Enhancement (I): APT (Con’t)

  11. Enhancement (II) : FEC • Propose to apply FEC to Bluetooth EDR • Called 2DM1/3/5 & 3DM1/3/5 • (15,10) shortened Hamming code that is able to correct single bit error • Packet Error Rate : ( p: packet error rate, b: bit error rate s: packet size/bits )

  12. Enhancement (II) : FEC (Con’t)

  13. Enhancement (III) – IFEC • Wireless errors are mostly bursty in presence, previous techniques should be modified. • Propose Interleaved FEC (IFEC) coding • Called DMI 1/3/5, 2DMI 1/3/5, and 3DMI 1/3/5 Burst Error Model (aka Gilbert-Elliott model)

  14. Enhancement (III) – IFEC (Con’t) FEC coding Interleaved FEC coding

  15. Simulation Results • Gilbert-Elliott model: Pgb= 0.005, Pbb from 0.9 to 0.9999 FEC coding IFEC coding

  16. Conclusion • We proposed three link layer enhancement techniques (APT/FEC/IFEC) for BT EDR. • We verified the proposed techniques using simulation. • The proposed solutions are applicable to other wireless technologies.

  17. Thank you !

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