UWB file transfer between mobile terminals using multi-media card standard interface and Bluetooth as a control radio

This paper explores the use of the high data rate (HDR) capability of ultra-wide band (UWB) wireless technology for large file transfer between multimedia-cards (MMC). First, we analyze the challenges of adding a UWB transceiver onto an MMC. Secondly, we study the use of a Bluetooth (BT) radio available from the MMC´s host as a control link. This solution permits to fully utilize UWB high data rate capability for data transfer, while limiting the needed modifications of the existing MMC and the terminal´s upgrade to application software only. An efficient automatic resend request mechanism for reliable file transfer is also proposed. Finally, we describe a prototype implementation based on mobile terminals, multimedia cards interface, and impulse UWB radio.