Abstract
We propose a congestion control scheme on wireless multichannel sensor networks. The proposed congestion control scheme consists of a congestion detection strategy and two cases of congestion control strategies. The congestion detection strategy modeled in the Morkov chain provides two thresholds that can detect two congestion conditions, or light and heavy congestion conditions. The two congestion control strategies consist of a weak congestion control strategy that can control light congestion and a strong congestion control strategy that can control heavy congestion. In addition, the proposed congestion control scheme assigns a priority to a received packet according to their transmission distance, and it differentiates the number of useable channels when congestion occurs. We can reduce energy consumption due to retransmission because packets received from long distance can use more channels in the proposed scheme.
Highlights
Wireless sensor networks are local networks that collect information through deploying sensor nodes where direct observation is hard
Charging energy or changing the batteries of a sensor node is difficult in wireless sensor networks, so reducing the energy consumption of a sensor node is an important issue among others
In the proposed congestion control scheme, congestion is classified as light congestion and heavy congestion according to congestion degree
Summary
Wireless sensor networks are local networks that collect information through deploying sensor nodes where direct observation is hard. Many researches on reducing the energy consumption of sensor nodes have been conducted, and researches on routing path, which minimizes the transmission path for reducing energy consumed for data transmission, are notable [1]. Congestion causes the rapid destruction of sensor networks by leading to too much additional energy consumption in sensor nodes in a short time. We propose a congestion control scheme considering transmission distance, which can allocate a priority according to the transmission distance of received data and can use the different range of channels along with the different priority. Multichannel sensor networks can realize reliable and efficient transmission and can transmit data simultaneously without interference or collision because sensor nodes in the multichannel sensor networks use different channels with different frequencies.
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