Relay network element equipment, remote network element equipment and optical fiber distributed system
A network element equipment and remote technology, applied in the direction of optical fiber transmission, transmission system, fiber optic radio, etc., can solve the problems of increasing construction difficulty, high cost, and increasing the volume of remote network element equipment, so as to reduce cost and construction difficulty, Promote the performance of the application
Active Publication Date: 2020-07-31
COMBA TELECOM SYST CHINA LTD
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Problems solved by technology
[0006] In the traditional technology, the analog radio frequency signal transmitted on the I2 interface can be transmitted only after completing the photoelectric conversion and amplification. The advantage of this is that the remote network element equipment is simple to implement, but the disadvantages are also obvious. There are two main ones: 1. One is that the working frequency of the RF optical module must be the same as the frequency of the final transmitted signal; the second is that each antenna RF signal requires an independent optical fiber transmission link
[0007] When the system is used in 2G / 3G / 4G systems, since the carrier frequency of the above systems is generally lower than 2.3GHz, and the number of transmitting and receiving antennas is less than or equal to 2 (especially the number of 2G / 3G antennas is mostly 1 antenna for transmitting and receiving ) The cost advantage is relatively obvious, but in the 5G NR system, the carrier frequency is in the 3.5GHz / 4.9GHz frequency band, the number of transceiver antennas is greater than or equal to 4, and the cost of the 3.5GHz / 4.9GHz RF optical module is very expensive (at least the current 2.3GHz RF optical module The price of the module is more than 5 times), and it needs multi-channel optical fiber link transmission (increasing the volume of remote network element equipment, and the need to lay multiple optical cables, increasing the difficulty of construction), resulting in the solution cost ratio of the digital-analog hybrid optical fiber distribution system All-digital optical fiber distributed system is still higher
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[0064] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0065] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention belongs. It should also be understood that terms, such as those defined in commonly used dictionaries, should be understood to have meanings consistent with the meanings in the co...
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Provided are a relay network element device, a far-end network element device and an optical fiber distributed system. By improving functions of the relay network element device and the far-end network element device, multiple paths of antenna signals can be modulated, by means of analog modulation, onto an intermediate frequency carrier, and are then converted by means of a radio frequency photoelectric module (ROF), such that the multiple paths of antenna signals are transmitted and made remote by means of one optical fiber, which can greatly reduce the cost and the construction difficulty of an optical fiber distributed system of a multi-antenna high-bandwidth communication system, and promotes the application of a 5G NR optical fiber distributed system indoors.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to a relay network element device, a remote network element device and an optical fiber distributed system. Background technique [0002] The optical fiber distributed system has the advantages of supporting multi-standard / multi-antenna signal transmission, adjustable active remote power, low link transmission loss, low construction difficulty, and network element monitoring. It has been widely used in the field of wireless communication indoor coverage. [0003] The current optical fiber distributed system generally adopts a three-level architecture, which is the source network element U1, the relay network element equipment, and the remote network element equipment. For the sake of description, the interface between the source network element U1 and the relay network element equipment is defined as I1, the interface between the relay network element equipment is def...
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IPC IPC(8): H04B10/2575
CPCH04B10/25752H04B10/25758
Inventor区洋杨波李馨
OwnerCOMBA TELECOM SYST CHINA LTD