摘要： 对于ISA100.11a这种通信机制复杂、可支持功能丰富的无线传感网(WSN)协议,传统的基于嵌入式单片机的终端设计已逐渐难以满足实际需要。为此,提出一种用户应用进程与其他通信协议相分离的终端设计。结合ISA100.11a协议应用层的面向对象结构,将应用层的用户应用进程及具体的I/O接口作为应用模块,将其余的协议部分作为通信模块。一方面使有限的单片机资源不必再同时处理应用功能和通信功能以避免性能瓶颈,另一方面可提供灵活可扩展的I/O接口搭配与管理,并实现ISA100.11a协议兼容外部协议数据的隧道传输功能。实验结果表明,该设计可以有效降低整个WSN系统的丢包率,且提供兼容ZigBee等其他外部协议数据的能力。

关键词: ISA100.11a协议, 终端设计, 应用模块, 通信模块, 丢包率, 隧道传输

Abstract: For Wireless Sensor Network(WSN) protocol with complicated communication mechanism and abundant supported function as ISA100.11a,traditional design of endpoint based on embedded single chip computer system is hardly to meet practical requirements.Hence,a design of endpoint in which the User Application Process(UAP) is separated from other protocols is proposed.Combining the object oriented structure of the application layer of ISA100.11a protocol,the user application processes and specific I/O interfaces of the application layer are defined as the application module,and the other parts of the protocol are defined as the communication module.One side,limited resource of single chip is no longer needed to deal with application and communication functions simultaneously to avoid bottleneck of performance.On the other side,flexible and extensible I/O interfaces which can be collected and managed are provided,then on this basis the tunnel transmission function in the ISA100.11a protocol which can be compatible with data from outer protocols can be implemented more conveniently.Experimental results show that the design can reduce the rate of packet missing of the whole WSN system efficiently,and provide compatible capacity of data from outer protocols such as ZigBee.

Key words: ISA100.11a protocol, design of endpoint, application module, communication module, rate of packet missing, tunnel transmission

中图分类号: 

• TP391