A method for avoiding interference between wireless body area networks

Abstract

The invention discloses a method for avoiding inter-network interference of a wireless body area network. The method comprises the following steps that: a coordinator periodically counts network throughput and compares the network throughput with a throughput threshold; whether the current channel is influenced by inter-network interference or not is judged; when the counted throughput is lower than a throughput threshold value, it is considered that the network needs to achieve inter-network interference avoidance, and the following algorithms are executed: a coordinator detects a selected channel and updates the frequency in each round to obtain a selection probability set of each channel in each round, transmission is kept on the channel in a non-conflict mode, and the channel of the next round is selected according to the selection probability set in the conflict mode; The above algorithms are repeated periodically, and when the network environment is stable, the network can be transmitted on the same idle channel all the time. According to the method, the game of channels is detected and simulated by using the channel throughput, and the channel with the highest idle probability is selected according to the changed frequency set during collision, so that the network can be effectively and quickly converged to the idle channel, the self-adaptive adjustment of the network isrealized, and the effect of avoiding inter-network interference is achieved.

Description

technical field [0001] The invention relates to the technical field of body area network signal processing, in particular to a frequency response-based distributed wireless body area network inter-network interference avoidance method. Background technique [0002] Wireless body area network is a human-centered short-distance communication network, which can be used to monitor and measure some important physical characteristics of the human body, and plays an important role in life and medical care. With the popularization of body area network, the users of body area network have increased rapidly, and the multi-user scenario has brought certain challenges to the performance of body area network. Body area network is a network that requires high reliability and low energy consumption, because it transmits important human body information, and the energy of sensor nodes in the network is extremely limited. When multiple body area networks are concentrated in a limited space ...

AI Technical Summary

Problems solved by technology

When multiple body area networks are concentrated in a limited space and send and receive simultaneously on the same channel, the normal information transmission of the network will be affected, causing retransmission packet loss and other phenomena, resulting in a decrease in network performance, such as a decrease in throughput, delay, etc. increase in time and energy consumption

[0003] Since the standard IEEE 802.15.6 of the body area network only defines 26 channels, the number of channels is very limited, so it is very likely that multiple networks work on the same channel, and when there are other same channels within the transmission range of the body area network When working on a network, it is inevitable that the information transmission of the network will be affected

These problems are all caused by inter-network interference of the same frequency between body area networks. This inter-network interference will not only affect the reliability of the network, but also retransmit packet loss will greatly increase the energy consumption of the network and shorten the network life. Therefore, It is necessary to find a way to reduce the inter-network interference of the body area network and maintain the normal performance of the network

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