Computer Science ›› 2016, Vol. 43 ›› Issue (6): 106-111.doi: 10.11896/j.issn.1002-137X.2016.06.022

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

HU Xian-jun, CHEN Jian-xin, ZHOU Sheng-qiang and LI Yi-fan   

  • Online:2018-12-01 Published:2018-12-01

Abstract: 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 constraints,and can meet the needs of heterogeneous data communication,improve the performance of the bandwidth utilization,and then improve the performance of the overall network.

Key words: Wireless sensor network,IEEE 802.15.4,GTS allocation,Real-time communication,NPGAS

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