Hybrid medium communication system outage probability calculation model and self-adaptive relay method

Abstract

The invention provides a hybrid medium communication system outage probability calculation model based on an AF/DF protocol and a self-adaptive relay method. The outage probability calculation model derives a closed expression of a system outage probability when a relay adopts AF and DF protocols by utilizing a two-dimensional LogN approximation algorithm and an MGF of an output signal-to-noise ratio; according to the adaptive relay method, on the basis of the outage probability calculation model, a signal-to-noise ratio equation is solved to obtain a threshold value of adaptive relay, and anappropriate AF or DF protocol is adaptively selected according to the threshold value for information forwarding, so that an efficient relay process is realized. According to the invention, the outageprobability calculation model has high accuracy and reliability; the self-adaptive relay method effectively overcomes the defects of the AF and the DF, the AF or DF forwarding protocol is dynamicallyselected according to the channel quality, and the relatively optimal outage probability performance is obtained on the premise of not increasing the system complexity, so that the optimal communication quality is obtained.

Description

technical field [0001] The invention belongs to the field of network communication, and in particular relates to a hybrid media communication system interruption probability calculation model and an adaptive relay method. Background technique [0002] Power line communication (power line communication, PLC) and wireless communication are important components of distribution network communication, and have broad application prospects in the fields of smart grid and home Internet of Things. However, the power line communication module needs to be fixed on the socket, and mobile access cannot be realized; and the power line channel is easily affected by line impedance, fading and impulse noise, etc., and the long-distance communication capability needs to be improved. On the other hand, although the wireless communication method has flexible access and simple networking, wireless high-frequency signals are easily blocked by obstacles such as doors, windows and walls, and the si...

AI Technical Summary

Problems solved by technology

In the prior art, although the adaptive relay protocol can effectively improve the spectral efficiency of the system, it needs to increase the feedback channel to the source node or the relay, but the feedback channel state information (Channel State Information, CSI) needs to open a special System resources, such as time slots, frequency bands, etc., the cost of feeding back CSI for self-adaptation is very high, which affects the effective information rate

Images