Realization Of IEEE 802.15.4 MAC Protocol Based On TinyOS And Research On Its Key Technologies

As the rapid development of the sensor technology, wireless communication technology and embedded computer technology, wireless sensor networks have gradually become one of the focuses of the emerging cutting-edge technology in the field of wireless network and have broad application prospects in many areas. As a wireless communication standard dedicated for low-rate and short-distance communication, IEEE 802.15.4 protocol defines the specifications of physical layer and media access control, providing a good solution for wireless sensor networks.As current IEEE 802.15.4 research environment is mostly based on the platform with non-open source library provided by chip manufacturers, it is difficult for researchers to understand the details of the protocols and their workflow. University of California, Berkeley, proposed the research project of wireless sensor network and designed a hardware platforms, operating systems TinyOS and network protocols for wireless sensor network. Meanwhile, with the development direction of miniaturization and low-cost of wireless sensor nodes, chip manufacturers begin to provide IEEE 802.15.4 RF chips based on SoC technology, such as CC2430 chip with 2.4GHz RF and an enhanced 8051 core integrated in one. However, with the limit of the architecture of 8051, the system can not run on this platform.This paper firstly designs a hardware research platform for wireless sensor based on CC2430 chip and ports TinyOS on this platform, providing a development environment for following protocol research. Then according to the architecture and mechanism of TinyOS and IEEE 802.15.4, this paper designs the realization framework of IEEE 802.15.4 on TinyOS and realizes the low-layer system software and the protocols of physical layer and MAC sub-layer. Finally, this paper tests the designed the protocol stack, and makes a comparation with non-open source stack.The implementation of IEEE 802.15.4 protocol stack based on TinyOS helps researchers study IEEE 802.15.4 protocol stack for CC2430 chip in open source environment, get rid of the shackles of the protocol stack library and provide a platform for for further development of high-layer protocols and applications.