Mixed mode digital radio frequency zoom out system based on system backup

Abstract

A mixed mode digital radio frequency zoom out system based on system backup comprises two DRUs capable of mutually backing up; in normal work, the DRU1 opens a mode switch of a mode signal, the DRU2 opens a mode switch of another mode signal, and a combiner combines the two mode signals outputted by the two DRUs into a mixed mode signal sent to an antenna feed system; when one DRU is in failure, the mode switches of the failure DRU are fully closed, the mode switches of the normal DRU are fully opened, the failure DRU is shielded, and the normal DRU can transmit the mixed mode signal. Therefore, the radio frequency zoom out system can support the mixed mode signal and simultaneously realize backup switching of the DRUs, thereby ensuring signal coverage continuity.

Description

technical field [0001] The invention relates to the technical field of remote radio frequency, in particular to a mixed-mode digital remote radio system based on system backup. Background technique [0002] At present, conventional digital remote radio systems include single-band systems and multi-band systems. In system design and application, both single-band and multi-band systems lack the consideration of backup, and with the requirement for the stability of communication network coverage, the backup of mobile communication extended coverage system highlights its importance. [0003] In conventional application forms, the daisy chain connection of digital remote radio system is quite extensive. In daisy chain application, when the intermediate digital remote radio unit DRU (Digital Remote RF Uinit) cannot When cascading optical fibers, the daisy chain will be disconnected from the DRU, which will have a great impact on coverage. Therefore, it is necessary to improve th...

AI Technical Summary

Problems solved by technology

There are two ways to improve the reliability level. One is to improve the reliability of the DRU’s own hardware and software, and the other is to increase the reliability of the entire link by adding peripheral backup devices and equipment backup functions. The main backup functions are optical Bypass, power backup, backup power, etc. In these backup functions, it is only considered that when the middle-level DRU is powered off or the optical device fails, the optical transmission bypass unit will automatically bypass the faulty machine, thereby avoiding the This failure will affect the normal operation of the subsequent DRU, but it cannot guarantee the continuous coverage of the current abnormal equipment site

[0004] Digital radio remote system based on system backup, the traditional technology is based on single-mode system, and has not yet involved the backup of mixed-mode system

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