一种改进的蓝牙设备发现过程及其仿真

Discovery and Simulation of an Enhanced Bluetooth Device

蓝牙是一种基于跳频通信的无线技术,在设备建立连接之前,必须通过设备发现过程找到邻居设备并获得它们的跳频信息。非协作设备虽然不参与组网,但参与了设备发现过程,导致设备发现过程所用的时间增加。文中对设备发现过程及来自非协作设备的干扰进行了分析,提出了一种改进的方案。该方案利用CoD字段携带网络编号信息,在设备发现过程结束前识别出非协作设备,并阻止它们参与到设备发现过程中来,从而加速了此过程。最后将该改进方案和蓝牙规范中的方案进行了对比仿真试验。仿真结果说明,在有非协作设备干扰的环境中,改进后的方案几乎消除了非协作设备的干扰,加速了设备发现的过程,最终加快了组网速度。

Bluetooth relies on frequency hopping mechanism, implying that devices are not able to establish connection unless they have previously discovered each neighbour device by synchronizing their frequency hopping patterns. The process of Device Discovery is slowed down by non - cooperating Bluetooth devices which are not invited to cooperate in the same network but involved in the Device Discovery process. This paper provides an insight on Device Discovery and proposes an enhanced approach to distinguish non - cooperating devices before they are discovered by PAN - ID carried in the CoD field, which could speedup the process of Device Discovery. The simulation, comparing the original and the proposed scheme, presents the benefits of the new approach.