支持异构数据通信的IEEE 802.15.4实时带宽分配算法

IEEE 802.15.4 Real-time Bandwidth Allocation Algorithm Supporting Heterogeneous Data Communication

IEEE 802.15.4协议的GTS分配机制能够支持实时和延迟约束的应用,目前已经应用于医疗健康、工业控制和楼宇自动化等物联网领域。但是,在高速实时异构数据传输应用中仍然存在局限性,它不能解决多于7个设备需要实时服务、时延约束小于超帧长度以及不同周期异构数据传输等问题。为了摆脱这些限制,提出一种新的支持异构数据通信的IEEE 802.15.4实时带宽分配算法,其根据不同周期任务的数据传输信息,调整部分传输任务的发送时间。性能分析显示,该算法可以严格遵循时延约束条件,满足异构数据通信,提高带宽利用率,提升整个网络的性能。

GTS allocation mechanism on IEEE 802. 15. 4 protocol can support real time and delay constrained applications. It has been used in the Internet of Things field such as medical health, industrial control, building automation and etc. But in the applications of high-speed real-time heterogeneous data transmission, there are still some limitations. It does not support real-time services required by more than seven devices, delay constraints less than the superframe length and different periodic heterogeneous data transmission applications. To overcome these limitations, this paper proposed a new IEEE 802. 15. 4 real-time bandwidth allocation algorithm supporting heterogeneous data communication, and adjusted the transmission time of some of the transfer tasks according to the data transmission information of different periodic tasks. Performance analysis result shows that this algorithm is in strict compliance with delay con- straints, and can meet the needs of heterogeneous data communication, improve the performance of the bandwidth utili- zation,and then improve the performance of the overall network.