Congestion Control of Wireless Sensor Networks using Discrete Sliding Mode Control
2019
Congestion results in dissipation of the node’s energy, deterioration of network performance and an increase in time delay and packet loss. By applying water-level control to queue length control, this paper presented a hop-to-hop congestion control model between link-layer and network-layer in Wireless Sensor Networks (WSNs). In addition, a reaching-law-based discrete sliding mode control algorithm (DSMC) was proposed to balance the inflows and outflows of node’s frame buffer. The simulation results in MATLAB show that the proposed DSMC is more robust to tolerate external interference, more adaptive to the change of queue length and more rapidly convergent than other traditional approaches, which effectively avoids network congestion and transmission delay.
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