Clock time synchronization for wireless 1394 heterogeneous networks

Wireless 1394 over IEEE802.15.3 must allow a data reserved for delivery over a wared 1394 network to be delivered over an IEEE802.15.3 wireless network through bridging IEEE 1394 to IEEE802.153. Isochronous transfers on the 1394 bus guarantee timely delivery of data. Specifically, isochronous transfers are scheduled by the bus so that they occur once every 125 μs and require clock time synchronization to complete the real-time data transfer. IEEE1394.1 and protocol adaptation layer for IEEE1394 over IEEE802.15.3 specify clock time synchronization for a wired 1394 bus network to a wired 1394 bus network and wireless 1394 nodes, which are IEEE802.15.3 nodes handling 1394 applications, over 1EEE802.15.3. Thus, the clock time synchronizations are just defined within a homogeneous network environment like IEEE1394 or IEEE802.15.3 until now. This paper proposes new clock time synchronization method for wireless 1394 heterogeneous networks between 1394 and 802.15.3. if new method is adopted for various wireless 1394 products, consumer electronics devices such as DTV and set-top box or PC devices on a 1394 bus network can transmit real time data to the AV devices on the other 1394 bus in a different place via IEEE802.15.3.