Efficient spectrum sensing method applied to smart grid communication

Abstract

The invention discloses an efficient spectrum sensing method applied to smart grid communication and a system. The system consists of smart electric meter terminals and a substation control center. The idle spectra of television frequency bands are dynamically utilized to realize bi-direction communication between the terminals and the control center on the basis of a cognitive radio technology. The method includes the following steps that: the control center predicts the occupancy of different television channels by using a three-order exponential smoothing model according to stored historical detection data and selects a group of channels with lower occupancy according to prediction results so as to create a small to-be-detected channel set by using the channels with lower occupancy; andthe smart electric meter terminals detect the small channel set through using a related detection algorithm on the basis of the known features of digital television signal PN sequence codes. Comparedwith a traditional spectrum sensing method, the efficient spectrum sensing method of the invention has the advantages of high detection precision and short detection time. With the method adopted, the probability of detecting idle channels can be increased, and spectrum sensing efficiency in the smart grid communication can be improved.

Description

technical field [0001] The invention relates to the field of smart grid communication, and mainly solves the problem of high-efficiency spectrum detection when the smart grid is wirelessly connected, and specifically relates to a prediction-based high-efficiency spectrum sensing method in smart grid communication. Background technique [0002] The smart grid is based on the traditional grid framework, adopts advanced sensing, measurement and equipment and efficient control methods, and uses high-speed, two-way, integrated communication network and computer information network as a platform to achieve a high degree of integration of power, information and business , making the power grid more reliable and secure. Compared with the traditional power grid, the smart grid guarantees the high-speed operation of the network structure during the transmission process, can realize the interaction with users, meet the diverse needs of users and provide value-added services to users, t...

AI Technical Summary

Problems solved by technology

If the control center does not receive the message input from the terminal sensor due to excessive delay, the control center may send wrong control messages to the smart meter terminal

(2) Large amount of transmitted information

Due to the current shortage of spectrum resources, it is not realistic to allocate dedicated spectrum for the power grid system. However, there are many application technologies in the public unlicensed frequency band, and the spectrum interference is relatively large, which cannot meet the needs of the power grid system for reliable and efficient communication.

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