Double-tree structure based scheduling strategy for wireless HART
DONG Li-da1,2, HUANG Cong 2, GUAN Lin-bo2
1. Hangzhou Institute of Service Engineering, Hangzhou Normal University, Hangzhou 311121, China;
2. Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
To resolve the problem of the complexity of the scheduling and maintenance of communication resources during global network scheduling, according to the characteristics of wireless highway addressable remote transducer (HART) data stream, a double-tree structure was used to simplify the original network topology. On this basis, a communication resources scheduling strategy for the wireless HART network with determined size and inmost depth was proposed. The basic idea is that when the network topology changes, the changed region of topology will be searched along with its double-tree structure, which will be reallocated for communication resources, and other unchanged region of topology will not be affected. Experimental and analytical results show that the strategy not only is effective to dynamically schedule but also ensure the high reliability, fluency and small delay of data.
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