Mobile fronthaul method and system based on LWDM technology

A pre-mobile technology, applied in the field of communication, can solve problems such as application scenarios that cannot meet 5G long-distance and multiple multiplexing ratios, and achieve the effects of flexible layout, easy installation, and low operating costs

Active Publication Date: 2021-11-30
清华大学天津电子信息研究院
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Problems solved by technology

After entering the 5G era, due to the increase in mobile fronthaul rate (4G fronthaul interface rate is mainly 10G, 5G fronthaul interface rate will be mainly 25G / 100G), CWDM technology is limited by its dispersion problem and it is difficult to transmit far at 25G rate The distance cannot meet the application scenarios of 5G's long distance and multiple multiplexing ratio

Method used

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  • Mobile fronthaul method and system based on LWDM technology
  • Mobile fronthaul method and system based on LWDM technology
  • Mobile fronthaul method and system based on LWDM technology

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Embodiment 1

[0045] In the single-fiber bidirectional mode, the central office multiplexer and the central office demultiplexer are the same central office multiplexer / demultiplexer (also called splitter multiplexer), and the remote multiplexer and remote demultiplexer are With the same remote multiplexer / demultiplexer (also called splitter / multiplexer), the central office multiplexer / demultiplexer and the remote multiplexer / demultiplexer perform bidirectional transmission through a single optical fiber. In this embodiment, for the same 5G general public radio interface eCPRI service or the same 5G general public radio interface eCPRI sector service, the corresponding central office incident optical signal and central office outgoing optical signal have different wavelengths. That is, the incident optical signal at the local end and the outgoing optical signal at the local end sent and received by the same optical port of the 5G distributed unit DU have different wavelengths, and the outgoi...

Embodiment 2

[0063] In the dual-fiber bidirectional mode, the central office multiplexer and the central office demultiplexer, the remote multiplexer and the remote demultiplexer can be set independently, the central office multiplexer is connected to the remote The multiplier is connected to the demultiplexer at the central office, and the LWDM signals (incident optical signals at the central office) of different wavelengths are multiplexed into one optical fiber for transmission through the multiplexer at the central office, and then transmitted to the demultiplexer at the remote end and then demultiplexed at the remote end. The multiplexer demultiplexes the LWDM signals of each wavelength.

[0064]In this embodiment, the central office multiplexer and the central office demultiplexer are set independently, the remote multiplexer and the remote demultiplexer are the same remote multiplexer and demultiplexer, and the central office multiplexer and the central office The demultiplexers are...

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Abstract

The invention relates to a mobile fronthaul method based on an LWDM technology and a mobile fronthaul system based on the LWDM technology, which adopt the LWDM technology to realize multiplexing and transmission of high-speed services and solve the problem of insufficient optical cable resources in a 5G fronthaul application scene. A 1310 nm working window is mainly concentrated in a wave channel of the LWDM technology, and the problem of long-distance transmission of 5G fronthaul high-speed eCPRI / CPRI signals is solved due to the good dispersion characteristic of the LWDM technology. Compared with the CWDM technology, the LWDM technology has the advantages that the problem that dispersion affects the transmission distance is solved, longer transmission distance can be achieved, better transmission performance is achieved, meanwhile, light amplification can be conducted on the LWDM of 1310 nm wave bands through an SOA, and therefore the longer transmission distance is obtained. Multiplexing and transmission of high-speed optical signals are achieved through the LWDM technology, the multiplexing ratio includes but is not limited to 3-wave multiplexing, 6-wave multiplexing and 9-wave multiplexing, and multiplexed wave channels and a distribution scheme of the multiplexed wave channels can be randomly selected from 9 wavelengths of the LWDM according to requirements.

Description

technical field [0001] The present invention relates to the technical field of communications, and more specifically, to a mobile fronthaul method based on LWDM technology and a mobile fronthaul system based on LWDM technology. Background technique [0002] With the rapid development of mobile technology, after entering the 4G era, in order to reduce construction costs and operation and maintenance costs, operators gradually adopted the network architecture of centralized radio access network C-RAN (Centralized Radio Access Network), and C-RAN The network architecture of the RAN needs to use a large amount of optical fibers in the fronthaul network of the mobile base station. Since the base station has many sites and is located in the access segment, the optical cable resources and pipeline resources are seriously insufficient. Wavelength division multiplexing technology can perfectly solve the problem of insufficient optical fiber resources in mobile fronthaul networks. In ...

Claims

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Application Information

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IPC IPC(8): H04J14/02
CPCH04J14/0227H04J14/0278
Inventor 王伟陈明华陈帅管佩祥
Owner 清华大学天津电子信息研究院
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