Digital all-optical distributed system allowing multiple-service access

Abstract

A digital all-optical distributed system allowing multiple-service access is characterized by comprising an access unit, an expansion unit and a remote unit, wherein the access unit and the expansion unit are connected through optical fiber, and the expansion unit and the remote unit are connected through optical fiber; the access unit or the expansion unit is connected with the network, and the remote unit is connected with the network; and a switching unit can be further arranged and is connected with the access unit which is used for 1+1 backup through a feeder line cable and optical fiber. The access unit in the system couples multiple service radio-frequency signals from a signal source, converts the signals into digital baseband signals and transmits the digital baseband signals to the expansion unit, the expansion unit realizes shunting of digital baseband downlink signals and combining of digital baseband uplink signals and transmits the digital baseband signals to the remote unit through optical fiber. The system can provide services such as wireless access, fixed network broadband, WLAN (wireless local area network) signal transmission and the like, can develop multiple functions on the basis of digital intermediate frequency and can support star, daisy chain and mixed networking.

Description

technical field [0001] The present invention relates to an indoor and outdoor digital optical fiber multi-service distributed system. The system is mainly used for deep coverage and multi-service signal coverage in special scenarios such as urban villages, large venues, office buildings, multi-network co-site and multi-network different-site. networking. Background technique [0002] The digital optical fiber remote system has been widely used in recent years due to its advantages of flexible networking and system gain that does not change with optical path loss, covering 2G, 3G and other operating networks. Due to the rapid development of wireless communication, the pre-research process from the first generation of analog mobile communication to the commercial use of 2G and 3G and LTE (Long Term Evolution, long-term evolution) has only been more than ten years. There are situations where multiple communication networks exist at the same time. Most operators generally have ...

AI Technical Summary

Problems solved by technology

[0004] In terms of installation and networking, the traditional digital optical fiber system is implemented by building a feeder network. The multi-frequency signal is fused to the antenna feeder to achieve coverage through passive combining devices. The radiation problem of the antenna has caused panic among people and led to the Many network construction systems in commercial communities and office buildings were dismantled due to complaints

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