Resource Sharing in Dual-Stack Devices: Opportunistic Bluetooth Transmissions in WLAN Busy Periods

Abstract

The coexistence problem of different wireless protocols that share a common frequency spectrum has attracted much attention owing to the proliferation of heterogeneous wireless networks in the research community. Recently, Bluetooth (BT) and Wireless LAN (WLAN) protocol stacks are integrated as a single-chip communication module, and they now even share the antenna as well as the spectrum. In this paper, we show that this integration provides new opportunity for one protocol to better understand the other and to operate in harmony with the other to avoid mutual interference. We develop an Opportunistic Bluetooth Transmission (OBT) scheme that enables a dual stack device having the integrated module to exploit previously-unused deferring times of the WLAN protocol. We evaluate its Performance through not only model-based analysis, but also practical implementation of a prototype testbed. Our preliminary results show that the OBT scheme can significantly improve the throughput of the dual-stack device.