| Summary: | 碩士 === 國立東華大學 === 資訊工程學系 === 90 === In recent years, the wireless communications have become a focus of much research and development. Many wireless network technologies have been developed such as the IEEE 802.11 series and the Bluetooth. The Bluetooth technology is based on the ad-hoc network architecture. The Bluetooth network is formed spontaneously without any pre-configuration. Two Bluetooth devices can establish a connection to build a small network named Piconet. A Piconet has maximum eight devices including one “Master” and seven “Slave”. The “Master” device has the ability to control and coordinate the operations of the Piconet.
In the current network world, the IP-based network as the Ethernet has become the most popular network style. Most services are developed very completely over the Internet. To let Bluetooth device retrieve the services of the Internet, a Bluetooth-IP gateway is needed because of the isolation of a Piconet. The Bluetooth specification has defined the LAN access profile and the PAN profile. The LAN access profile using the IETF Point-to-Point Protocol (PPP) and the PAN profile using the Bluetoooth Network Encapsulation Protocol (BNEP).
A PC-based transparent gateway for interconnecting Bluetooth Piconet and IP local area networks (LAN) was designed in our research. The essential function of this designed Bluetooth-IP gateway is to achieve a seamless integration among home appliances, networking elements and multi-systems using the Address Resolution Protocol (ARP) and connection management scheme. The key techniques developed, as well as the performance analysis in terms of queue length, loss rate, throughput and transmission delay are explored in this research.
In the Queue Length analysis, The Gateway queue length is in the direct proportion with the size of the traffic flow. In the Loss Rate analysis, the Loss rate decreases when the Gateway queue length increasing, but it becomes stable when the Gateway queue length reaches the specified value. In the Throughput analysis, the Gateway queue length has no effect to the throughput of the gateway. In the Delay analysis, the Delay increases when the Gateway queue length increasing, but it becomes stable when the Gateway queue length reaches the specified value. Moreover, the implementation issues are also discussed in the thesis. We believed that the gateway has solved the problem of the interconnection of Bluetooth Piconet and LAN.
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