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

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