CN105490744A - LTE dual-channel fiber remote household coverage system - Google Patents
LTE dual-channel fiber remote household coverage system Download PDFInfo
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- CN105490744A CN105490744A CN201510948233.9A CN201510948233A CN105490744A CN 105490744 A CN105490744 A CN 105490744A CN 201510948233 A CN201510948233 A CN 201510948233A CN 105490744 A CN105490744 A CN 105490744A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
- H04W16/20—Network planning tools for indoor coverage or short range network deployment
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Abstract
The invention relates to an LTE dual-channel fiber remote household coverage system. The system comprises a near-end unit, an expansion unit and a far-end unit which are successively connected, wherein the near-end unit comprises a diplexer 1, a diplexer 2, a laser 1, a laser 2, an optical wavelength division multiplexer 1 and an optical demultiplexer 1; the expansion unit comprises an optical wavelength division multiplexer 2 and an optical demultiplexer 2; and the far-end unit comprises an optical wavelength division multiplexer 3, a laser 3, a laser 4, a power amplifier low-noise integrated module 1, a power amplifier low-noise integrated module 2, a diplexer 3 and a diplexer 4. The LTE dual-channel fiber remote household coverage system can solve the problems of low LTE dual-channel signal indoor coverage, ping-pong effect, pilot frequency pollution and the like and improves the perception of users.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of LTE double channel optical fiber zooms out covering system of registering one's residence.
Background technology
Operator takes the strategy of light entering and copper back, and there is broadband signal in existing community, hotel, hotel, substantially adopts fiber entering household to realize xPON signal and to register one's residence covering; Country carries out " broadband China ", adopt fiber entering household to realize xPON signal and register one's residence coverage mode by large-scale promotion, the covering and traditional room subsystem is not all registered one's residence, antenna is all on house doorway, LTE double-channel signal is serious by decay during body of wall, cause indoor signal and extraneous signal field intensity to be more or less the same, produce ping-pong and pilot pollution, have a strong impact on the perception of user.
Summary of the invention
In view of this, the object of the invention is to propose a kind of LTE double channel optical fiber and zoom out covering system of registering one's residence, have employed secondary fiber optic stretch, a fiber optic stretch solves the problem of LTE double-channel signal site different from xPON signal, the original Drop cable of recycling xPON signal transmits LTE double-channel signal and xPON signal simultaneously, realize the covering of registering one's residence of LTE double-channel signal and xPON signal simultaneously, solve the problems such as the indoor weak covering of LTE double-channel signal, ping-pong and pilot pollution, improve the perception of user.
The present invention adopts following scheme to realize: a kind of LTE double channel optical fiber zooms out covering system of registering one's residence, and specifically comprises the near-end unit, expanding element and the far-end unit that are connected successively;
Described near-end unit comprises duplexer 1, duplexer 2, laser 1, laser 2, light wavelength division multiplexing 1 and optical branching device 1; Described duplexer 1 is connected with laser 1, and described duplexer 2 is connected with laser 2, described laser 1, laser 2 are all connected to described light wavelength division multiplexing 1, and described light wavelength division multiplexing 1 is connected with optical branching device 1;
Described expanding element comprises light wavelength division multiplexing 2, optical branching device 2, and described light wavelength division multiplexing 2 is connected with described optical branching device 2;
Described far-end unit comprises light wavelength division multiplexing 3, laser 3, laser 4, power amplifier low noise integrated module 1, power amplifier low noise integrated module 2, duplexer 3 and duplexer 4; Described light wavelength division multiplexing 3 is connected to described power amplifier low noise integrated module 1, power amplifier low noise integrated module 2 through described laser 3, laser 4 respectively, and described power amplifier low noise integrated module 1, power amplifier low noise integrated module 2 are connected to retransmitting antenna 1, retransmitting antenna 2 through described duplexer 3 and duplexer 4 respectively.
Further, described expanding element is a plurality of, and each expanding element includes light wavelength division multiplexing 2, the optical branching device 2 of series connection mutually.
Further, described far-end unit is a plurality of, and each far-end unit includes light wavelength division multiplexing 3, laser 3, laser 4, power amplifier low noise integrated module 1, power amplifier low noise integrated module 2, duplexer 3 and duplexer 4.
Further, the light signal of multiple different wave length can be carried out conjunction road by described light wavelength division multiplexing 1, light wavelength division multiplexing 2, light wavelength division multiplexing 3, also the light signal containing multiple different wave length can be resolved into the light signal of multiple different wave length.
Further, one end of described near-end unit is provided with two ports, be coupled with a LTE binary channels base station or LTE binary channels base station zoom out system respectively, the other end of described near-end unit comprises a plurality of optical fiber interface, and is connected by the optical fiber interface of optical fiber with a plurality of expanding element; One end of described expanding element is provided with two optical fiber interfaces, one optical fiber interface is connected with near-end unit by optical fiber, another optical fiber interface is connected with OLT by optical fiber, the other end of described expanding element comprises a plurality of optical fiber interface, and is connected by the optical fiber interface of optical fiber with described a plurality of far-end unit; Described far-end unit one end is provided with two optical fiber interfaces, wherein an optical fiber interface is connected with expanding element by optical fiber, another optical fiber interface is connected with light Modem by optical fiber, the other end of described far-end unit is provided with two retransmitting antenna, in order to cover zooming out the radiofrequency signal after amplification the area of coverage.
Further, when signal transfers to described expanding element from described near-end unit, transferring to described far-end unit is again LTE double-channel downlink, and when signal transfers to described expanding element from described far-end unit, then to transfer to described near-end unit be LTE double-channel uplink.
Preferably, described near-end unit in the downlink for by the LTE binary channels downlink radio-frequency signal of LTE binary channels base station or LTE binary channels base station zoom out system through duplexer 1, duplexer 2 enters laser 1 respectively, laser 2, and be converted to λ 1 light signal respectively, λ 2 light signal, λ 1 light signal, λ 2 light signal enters light wavelength division multiplexing 1 respectively, light wavelength division multiplexing 1 is by λ 1 light signal, λ 2 light signal closes road and becomes a kind of containing two kinds of different wave length (λ 1, λ 2) light signal laggard enter optical branching device 1, be shunted to multipath light signal and be sent to expanding element by optical fiber, described near-end unit contains the light signal of two kinds of different wave lengths (λ 1, λ 2) in the uplink from the one that expanding element transmits by optical fiber reception, light wavelength division multiplexing 1 is entered through optical branching device 1, light signal containing different wave length is resolved into λ 1 light signal by light wavelength division multiplexing 1, λ 2 light signal enters laser 1, laser 2 respectively, and be converted to LTE binary channels upstream radio-frequency signal respectively, be sent to described LTE binary channels base station or LTE binary channels base station zoom out system through duplexer 1, duplexer 2.
The one that described expanding element is sent by optical fiber reception near-end unit in the downlink contains the light signal of two kinds of different wave lengths (λ 1, λ 2), xPON light signal (λ 3) and the light signal containing two kinds of different wave lengths (λ 1, λ 2) are closed road and become a kind of light signal containing three kinds of different wave lengths (λ 1, λ 2, λ 3) to enter optical branching device 2 by light wavelength division multiplexing 2, and the light signal containing three kinds of different wave lengths (λ 1, λ 2, λ 3) is divided into multipath light signal and is sent to far-end unit by fibre by optical branching device 2; Described expanding element receives by optical fiber the light signal containing three kinds of different wave lengths (λ 1, λ 2, λ 3) that distally unit transmits in the uplink and enters light wavelength division multiplexing 2 through optical branching device 2, light signal containing three kinds of different wave lengths (λ 1, λ 2, λ 3) is resolved into xPON light signal (λ 3) and the light signal containing two kinds of different wave lengths (λ 1, λ 2) by light wavelength division multiplexing 2, light signal containing two kinds of different wave lengths (λ 1, λ 2) is sent to near-end unit by optical fiber, and xPON light signal (λ 3) returns OLT through optical fiber.
Described far-end unit in the downlink by optical fiber receive that expanding element sends containing the light signal of three kinds of different wave lengths, xPON light signal (λ 3) is resolved into through light wavelength division multiplexing 3, λ 1 light signal and λ 2 light signal, xPON light signal (λ 3) is by Fiber connection light Modem, λ 1 light signal and λ 2 light signal enter laser 3 respectively, laser 4, change LTE binary channels downlink radio-frequency signal respectively and enter power amplifier low noise integrated module 1 respectively, power amplifier low noise integrated module 2, duplexer 3 is entered respectively after power amplification circuit amplifies respectively, duplexer 4, through retransmitting antenna 1, retransmitting antenna 2 pairs of areas of coverage cover, described far-end unit in up link not by LTE binary channels upstream radio-frequency signal that retransmitting antenna 1 and retransmitting antenna 2 receive, this LTE binary channels upstream radio-frequency signal is through duplexer 3, duplexer 4 enters power amplifier low noise integrated module 1 and power amplifier low noise integrated module 2 respectively, laser 3 is entered respectively after low noise amplifier circuit amplifies, laser 4, be converted to λ 1 light signal respectively, λ 2 light signal enters light wavelength division multiplexing 3 respectively, light wavelength division multiplexing 3 is by λ 1 light signal, λ 2 light signal and xPON light signal (λ 3) close road and become a kind of containing three kinds of different wave length (λ 1, λ 2, λ 3) light signal, expanding element is sent to by optical fiber.
Compared with prior art, the present invention has following beneficial effect: the near-end unit of the present invention by arranging, expanding element and far-end unit, there is higher integrated level, have employed secondary fiber optic stretch, a fiber optic stretch, solve the problem of LTE double-channel signal site different from xPON signal, the original Drop cable of recycling xPON signal transmits LTE double-channel signal and xPON signal simultaneously, realize the covering of registering one's residence of LTE double-channel signal and xPON signal simultaneously, solve the indoor weak covering of LTE double-channel signal, the problem such as ping-pong and pilot pollution, improve the perception of user.
Accompanying drawing explanation
Fig. 1 is system architecture diagram of the present invention.
Fig. 2 is near-end unit principle framework figure of the present invention.
Fig. 3 is expanding element principle framework figure of the present invention.
Fig. 4 is far-end unit principle framework figure of the present invention.
Fig. 5 is near-end unit of the present invention, expanding element and far-end unit catenation principle frame diagram.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
As shown in Figure 1, present embodiments provide a kind of LTE double channel optical fiber and zoom out covering system of registering one's residence, specifically comprise the near-end unit, expanding element and the far-end unit that are connected successively;
As shown in Figure 2, described near-end unit comprises duplexer 1, duplexer 2, laser 1, laser 2, light wavelength division multiplexing 1 and optical branching device 1; Described duplexer 1 is connected with laser 1, and described duplexer 2 is connected with laser 2, described laser 1, laser 2 are all connected to described light wavelength division multiplexing 1, and described light wavelength division multiplexing 1 is connected with optical branching device 1;
As shown in Figure 3, described expanding element comprises light wavelength division multiplexing 2, optical branching device 2, and described light wavelength division multiplexing 2 is connected with described optical branching device 2;
As shown in Figure 4, described far-end unit comprises light wavelength division multiplexing 3, laser 3, laser 4, power amplifier low noise integrated module 1, power amplifier low noise integrated module 2, duplexer 3 and duplexer 4; Described light wavelength division multiplexing 3 is connected to described power amplifier low noise integrated module 1, power amplifier low noise integrated module 2 through described laser 3, laser 4 respectively, and described power amplifier low noise integrated module 1, power amplifier low noise integrated module 2 are connected to retransmitting antenna 1, retransmitting antenna 2 through described duplexer 3 and duplexer 4 respectively.
In the present embodiment, described expanding element is a plurality of, and each expanding element includes light wavelength division multiplexing 2, the optical branching device 2 of series connection mutually.
In the present embodiment, described far-end unit is a plurality of, and each far-end unit includes light wavelength division multiplexing 3, laser 3, laser 4, power amplifier low noise integrated module 1, power amplifier low noise integrated module 2, duplexer 3 and duplexer 4.
In the present embodiment, the light signal of multiple different wave length can be carried out conjunction road by described light wavelength division multiplexing 1, light wavelength division multiplexing 2, light wavelength division multiplexing 3, also the light signal containing multiple different wave length can be resolved into the light signal of multiple different wave length.
In the present embodiment, one end of described near-end unit is provided with two ports, be coupled with a LTE binary channels base station or LTE binary channels base station zoom out system respectively, the other end of described near-end unit comprises a plurality of optical fiber interface, and is connected by the optical fiber interface of optical fiber with a plurality of expanding element; One end of described expanding element is provided with two optical fiber interfaces, one optical fiber interface is connected with near-end unit by optical fiber, another optical fiber interface is connected with OLT by optical fiber, the other end of described expanding element comprises a plurality of optical fiber interface, and is connected by the optical fiber interface of optical fiber with described a plurality of far-end unit; Described far-end unit one end is provided with two optical fiber interfaces, wherein an optical fiber interface is connected with expanding element by optical fiber, another optical fiber interface is connected with light Modem by optical fiber, the other end of described far-end unit is provided with two retransmitting antenna, in order to cover zooming out the radiofrequency signal after amplification the area of coverage.
In the present embodiment, when signal transfers to described expanding element from described near-end unit, transferring to described far-end unit is again LTE double-channel downlink, and when signal transfers to described expanding element from described far-end unit, then to transfer to described near-end unit be LTE double-channel uplink.
In the present embodiment, described near-end unit in the downlink for by the LTE binary channels downlink radio-frequency signal of LTE binary channels base station or LTE binary channels base station zoom out system through duplexer 1, duplexer 2 enters laser 1 respectively, laser 2, and be converted to λ 1 light signal respectively, λ 2 light signal, λ 1 light signal, λ 2 light signal enters light wavelength division multiplexing 1 respectively, light wavelength division multiplexing 1 is by λ 1 light signal, λ 2 light signal closes road and becomes a kind of containing two kinds of different wave length (λ 1, λ 2) light signal laggard enter optical branching device 1, be shunted to multipath light signal and be sent to expanding element by optical fiber, described near-end unit contains the light signal of two kinds of different wave lengths (λ 1, λ 2) in the uplink from the one that expanding element transmits by optical fiber reception, light wavelength division multiplexing 1 is entered through optical branching device 1, light signal containing different wave length is resolved into λ 1 light signal by light wavelength division multiplexing 1, λ 2 light signal enters laser 1, laser 2 respectively, and be converted to LTE binary channels upstream radio-frequency signal respectively, be sent to described LTE binary channels base station or LTE binary channels base station zoom out system through duplexer 1, duplexer 2.
The one that described expanding element is sent by optical fiber reception near-end unit in the downlink contains the light signal of two kinds of different wave lengths (λ 1, λ 2), xPON light signal (λ 3) and the light signal containing two kinds of different wave lengths (λ 1, λ 2) are closed road and become a kind of light signal containing three kinds of different wave lengths (λ 1, λ 2, λ 3) to enter optical branching device 2 by light wavelength division multiplexing 2, and the light signal containing three kinds of different wave lengths (λ 1, λ 2, λ 3) is divided into multipath light signal and is sent to far-end unit by fibre by optical branching device 2; Described expanding element receives by optical fiber the light signal containing three kinds of different wave lengths (λ 1, λ 2, λ 3) that distally unit transmits in the uplink and enters light wavelength division multiplexing 2 through optical branching device 2, light signal containing three kinds of different wave lengths (λ 1, λ 2, λ 3) is resolved into xPON light signal (λ 3) and the light signal containing two kinds of different wave lengths (λ 1, λ 2) by light wavelength division multiplexing 2, light signal containing two kinds of different wave lengths (λ 1, λ 2) is sent to near-end unit by optical fiber, and xPON light signal (λ 3) returns OLT through optical fiber.
Described far-end unit in the downlink by optical fiber receive that expanding element sends containing the light signal of three kinds of different wave lengths, xPON light signal (λ 3) is resolved into through light wavelength division multiplexing 3, λ 1 light signal and λ 2 light signal, xPON light signal (λ 3) is by Fiber connection light Modem, λ 1 light signal and λ 2 light signal enter laser 3 respectively, laser 4, change LTE binary channels downlink radio-frequency signal respectively and enter power amplifier low noise integrated module 1 respectively, power amplifier low noise integrated module 2, duplexer 3 is entered respectively after power amplification circuit amplifies respectively, duplexer 4, through retransmitting antenna 1, retransmitting antenna 2 pairs of areas of coverage cover, the LTE binary channels upstream radio-frequency signal that described far-end unit receives respectively by retransmitting antenna 1 and retransmitting antenna 2 in up link, this LTE binary channels upstream radio-frequency signal is through duplexer 3, duplexer 4 enters power amplifier low noise integrated module 1 and power amplifier low noise integrated module 2 respectively, laser 3 is entered respectively after low noise amplifier circuit amplifies, laser 4, be converted to λ 1 light signal respectively, λ 2 light signal enters light wavelength division multiplexing 3 respectively, light wavelength division multiplexing 3 is by λ 1 light signal, λ 2 light signal and xPON light signal (λ 3) close road and become a kind of containing three kinds of different wave length (λ 1, λ 2, λ 3) light signal, expanding element is sent to by optical fiber.
Especially, as shown in Figure 5, down link is: near-end unit in the downlink for by the LTE binary channels downlink radio-frequency signal of LTE binary channels base station or LTE binary channels base station zoom out system through duplexer 1, duplexer 2 enters laser 1 respectively, laser 2, and be converted to λ 1 light signal respectively, λ 2 light signal, λ 1 light signal, λ 2 light signal enters light wavelength division multiplexing 1 respectively, light wavelength division multiplexing 1 is by λ 1 light signal, λ 2 light signal closes road and becomes a kind of containing two kinds of different wave length (λ 1, λ 2) light signal laggard enter optical branching device 1, be shunted to multipath light signal and be sent to expanding element by optical fiber, the one that described expanding element is sent by optical fiber reception near-end unit in the downlink contains the light signal of two kinds of different wave lengths (λ 1, λ 2), xPON light signal (λ 3) and the light signal containing two kinds of different wave lengths (λ 1, λ 2) are closed road and become a kind of light signal containing three kinds of different wave lengths (λ 1, λ 2, λ 3) to enter optical branching device 2 by light wavelength division multiplexing 2, and the light signal containing three kinds of different wave lengths (λ 1, λ 2, λ 3) is divided into multipath light signal and is sent to far-end unit by fibre by optical branching device 2, described far-end unit in the downlink by optical fiber receive that expanding element sends containing the light signal of three kinds of different wave lengths, xPON light signal (λ 3) is resolved into through light wavelength division multiplexing 3, λ 1 light signal and λ 2 light signal, xPON light signal (λ 3) is by Fiber connection light Modem, λ 1 light signal and λ 2 light signal enter laser 3 respectively, laser 4, change LTE binary channels downlink radio-frequency signal respectively and enter power amplifier low noise integrated module 1 respectively, power amplifier low noise integrated module 2, duplexer 3 is entered respectively after power amplification circuit amplifies respectively, duplexer 4, through retransmitting antenna 1, retransmitting antenna 2 pairs of areas of coverage cover.
Up link is: described far-end unit in up link not by LTE binary channels upstream radio-frequency signal that retransmitting antenna 1 and retransmitting antenna 2 receive, this LTE binary channels upstream radio-frequency signal is through duplexer 3, duplexer 4 enters power amplifier low noise integrated module 1 and power amplifier low noise integrated module 2 respectively, laser 3 is entered respectively after low noise amplifier circuit amplifies, laser 4, be converted to λ 1 light signal respectively, λ 2 light signal enters light wavelength division multiplexing 3 respectively, light wavelength division multiplexing 3 is by λ 1 light signal, λ 2 light signal and xPON light signal (λ 3) close road and become a kind of containing three kinds of different wave length (λ 1, λ 2, λ 3) light signal, expanding element is sent to by optical fiber, described expanding element receives by optical fiber the light signal containing three kinds of different wave lengths (λ 1, λ 2, λ 3) that distally unit transmits in the uplink and enters light wavelength division multiplexing 2 through optical branching device 2, light signal containing three kinds of different wave lengths (λ 1, λ 2, λ 3) is resolved into xPON light signal (λ 3) and the light signal containing two kinds of different wave lengths (λ 1, λ 2) by light wavelength division multiplexing 2, light signal containing two kinds of different wave lengths (λ 1, λ 2) is sent to near-end unit by optical fiber, and xPON light signal (λ 3) returns OLT through optical fiber, described near-end unit contains the light signal of two kinds of different wave lengths (λ 1, λ 2) in the uplink from the one that expanding element transmits by optical fiber reception, light wavelength division multiplexing 1 is entered through optical branching device 1, light signal containing different wave length is resolved into λ 1 light signal by light wavelength division multiplexing 1, λ 2 light signal enters laser 1, laser 2 respectively, and be converted to LTE binary channels upstream radio-frequency signal respectively, be sent to described LTE binary channels base station or LTE binary channels base station zoom out system through duplexer 1, duplexer 2.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (6)
1. LTE double channel optical fiber zooms out a covering system of registering one's residence, and it is characterized in that: comprise the near-end unit, expanding element and the far-end unit that are connected successively;
Described near-end unit comprises duplexer 1, duplexer 2, laser 1, laser 2, light wavelength division multiplexing 1 and optical branching device 1; Described duplexer 1 is connected with laser 1, and described duplexer 2 is connected with laser 2, described laser 1, laser 2 are all connected to described light wavelength division multiplexing 1, and described light wavelength division multiplexing 1 is connected with optical branching device 1;
Described expanding element comprises light wavelength division multiplexing 2, optical branching device 2, and described light wavelength division multiplexing 2 is connected with described optical branching device 2;
Described far-end unit comprises light wavelength division multiplexing 3, laser 3, laser 4, power amplifier low noise integrated module 1, power amplifier low noise integrated module 2, duplexer 3 and duplexer 4; Described light wavelength division multiplexing 3 is connected to described power amplifier low noise integrated module 1, power amplifier low noise integrated module 2 through described laser 3, laser 4 respectively, and described power amplifier low noise integrated module 1, power amplifier low noise integrated module 2 are connected to retransmitting antenna 1, retransmitting antenna 2 through described duplexer 3 and duplexer 4 respectively.
2. a kind of LTE double channel optical fiber according to claim 1 zooms out covering system of registering one's residence, and it is characterized in that: described expanding element is a plurality of, and each expanding element includes light wavelength division multiplexing 2, the optical branching device 2 of series connection mutually.
3. a kind of LTE double channel optical fiber according to claim 1 zooms out covering system of registering one's residence, it is characterized in that: described far-end unit is a plurality of, each far-end unit includes light wavelength division multiplexing 3, laser 3, laser 4, power amplifier low noise integrated module 1, power amplifier low noise integrated module 2, duplexer 3 and duplexer 4.
4. a kind of LTE double channel optical fiber according to claim 1 zooms out covering system of registering one's residence, it is characterized in that: the light signal of multiple different wave length can be carried out conjunction road by described light wavelength division multiplexing 1, light wavelength division multiplexing 2, light wavelength division multiplexing 3, also the light signal containing multiple different wave length can be resolved into the light signal of multiple different wave length.
5. a kind of LTE double channel optical fiber according to claim 1 zooms out covering system of registering one's residence, it is characterized in that: one end of described near-end unit is provided with two ports, be coupled with a LTE binary channels base station or LTE binary channels base station zoom out system respectively, the other end of described near-end unit comprises a plurality of optical fiber interface, and is connected by the optical fiber interface of optical fiber with a plurality of expanding element; One end of described expanding element is provided with two optical fiber interfaces, one optical fiber interface is connected with near-end unit by optical fiber, another optical fiber interface is connected with OLT by optical fiber, the other end of described expanding element comprises a plurality of optical fiber interface, and is connected by the optical fiber interface of optical fiber with described a plurality of far-end unit; Described far-end unit one end is provided with two optical fiber interfaces, wherein an optical fiber interface is connected with expanding element by optical fiber, another optical fiber interface is connected with light Modem by optical fiber, the other end of described far-end unit is provided with two retransmitting antenna, in order to cover zooming out the radiofrequency signal after amplification the area of coverage.
6. a kind of LTE double channel optical fiber according to claim 1 zooms out covering system of registering one's residence, it is characterized in that: when signal transfers to described expanding element from described near-end unit, transferring to described far-end unit is again LTE double-channel downlink, when signal transfers to described expanding element from described far-end unit, then to transfer to described near-end unit be LTE double-channel uplink.
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| CN109792296A (en) * | 2016-09-28 | 2019-05-21 | 日本电信电话株式会社 | Optical transmission system and Wavelength allocation method |
| CN109792296B (en) * | 2016-09-28 | 2022-05-10 | 日本电信电话株式会社 | Optical transmission system and wavelength allocation method |
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| CN105490744B (en) | 2018-01-23 |
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