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Improving the Bluetooth and Wi-Fi Coexistence Issue using a Canceller

Title
Improving the Bluetooth and Wi-Fi Coexistence Issue using a Canceller
Translated Title
Canceller 를 이용한 Bluetooth 와 Wi-Fi 성능 향상
Authors
Jeon, Won Hong
DGIST Authors
Jeon, Won Hong; Park, Kyung Joon; Cho, Hui Sup
Advisor(s)
Park, Kyung Joon
Co-Advisor(s)
Cho, Hui Sup
Issue Date
2014
Available Date
2016-05-18
Degree Date
2014. 2
Type
Thesis
Keywords
coexistenceAFTHybrid ArbitratorBluetoothWi-FiCanceller
Abstract
Bluetooth and Wi-Fi are two common wireless technologies today and are especially prevalent in smart phones. Although these two technologies are convenient, if the two are used simultaneously, performance degradation, such as throughput and communication valid distance, occurs. This paper presents a simple and effective solution for resolving the in-device coexistence problem between Wi-Fi and Bluetooth. The main idea is to introduce a canceller in the circuit to cancel out the in-device interference when Wi-Fi and Bluetooth radios operate simultaneously in one device. Based on the testbed, extensive experiments were carried out to validate the performance of the proposed scheme. Our results show that the proposed solution gives substantially better performance than existing methods. Our results show that our proposed scheme provides more isolation to use AFH mechanism in small devices than current techniques. Our proposed approach, entitled the hybrid arbitrator, can significantly improve the performance of both of Wi-Fi and Bluetooth. ⓒ 2014 DGIST
Table Of Contents
Ⅰ. INTRODUCTION -- Ⅱ. Background -- 2.1 Bluetooth 4 -- 2.2 Wi-Fi 7 -- Ⅲ. Existing solutions and limitations -- 3.1 Existing solutions for coexistence of Wi-Fi and Bluetooth 12 -- 3.2 Limitation of existing coexistence solutions 14 -- 3.2.1 TDM-based solutions 14 -- 3.2.2 FDM-based solutions 15 -- Ⅳ. Proposed scheme -- 4.1 Canceller 17 -- 4.2 Cancellation channel setting 18 -- 4.3 Hybrid arbitrator 19 -- Ⅴ. Experimental -- 5.1 Canceller performance 21 -- 5.1.1 Canceller Arrangement 21 -- 5.1.2 Measurement of cancellation performance according to frequency 22 -- 5.1.3 Measurement of active cancellation performance using spectrum analyzer 23 -- 5.2 Measurement of real throughput 25 -- 5.2.1 Organization of test bed 25 -- 5.2.2 Case of Wi-Fi TX and Bluetooth RX 27 -- 5.2.3 Case of Wi-Fi RX and Bluetooth TX 28 -- Ⅵ. Conclusion -- References 31
URI
http://dgist.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002262557
http://hdl.handle.net/20.500.11750/1364
DOI
10.22677/thesis.2262557
Degree
Master
Department
Information and Communication Engineering
University
DGIST
Files:
Collection:
Information and Communication EngineeringThesesMaster


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