Multi-base-station anti-jamming method based on cordless telephone system

Abstract

The invention is suitable for the field of multi-base-station anti-jamming of a cordless telephone system and discloses a multi-base-station anti-jamming method based on a cordless telephone system. By presetting a frequency hopping sequence table in which one frequency hopping is spaced by at least two frequency points, a switch transmits frequency hopping sequence resetting messages at the intervals of at least 80 MS to each base station, so that the frequency hopping of each base station is spaced by at least four frequency points. Compared with the prior art, the multi-base-station anti-jamming method based on the cordless telephone system has the advantages that: jamming noises generated by the collision jamming of frequency points between adjacent base stations during conversation of spaced extension telephones of the base station can be avoided, and the conservation quality of the extension telephones is enhanced.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an anti-interference method between multiple base stations based on a cordless telephone system. Background technique [0002] In a cordless telephone system, if the signal coverage is desired to be wide, communication between two remote handsets in the system can usually be realized through a plurality of base stations. Because the signal of the base station is affected by the surrounding buildings, multiple base stations will be set up in some areas, which causes the base station density in this area to be too large and the distance between the base stations is relatively close. [0003] The base station of the existing cordless telephone system usually has four voice channels, and each voice channel uses the same frequency hopping sequence list (some base stations of similar systems also use different frequency hopping sequence lists), with a period of 750ms , ...

AI Technical Summary

Problems solved by technology

For the case where all base stations use the same frequency hopping sequence table, the two adjacent frequency hopping frequency points need to be separated by 2-4 channels. When the switch system is turned on, all base stations use the same frequency hopping sequence table, and each The base stations start at the same time, that is to say, each base station jumps at the same frequency point at almost the same time, which will cause serious mutual interference between base stations with similar distances, which will seriously affect the effect of the handset call, and easily generate cycles. sexual noise

For the case where all base stations use different frequency hopping sequence lists, there are also frequency point collisions between each other once or twice every 750ms

Images