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Improving Bluetooth EDR Data Throughput Using FEC and Interleaving

This paper presents three novel link layer enhancements aimed at improving data throughput for Bluetooth Enhanced Data Rate (EDR) using Forward Error Correction (FEC) and interleaving techniques. The proposed enhancements include Adaptive Packet Type (APT), FEC coding with Hamming codes, and Interleaved FEC (IFEC). By addressing the bursty nature of wireless channel errors, these methods enhance the reliability of Bluetooth communications and can be applied to other wireless technologies. Simulation results validate the effectiveness of the proposed solutions.

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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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