CN113497654A - Optical fiber distributed system - Google Patents
Optical fiber distributed system Download PDFInfo
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- CN113497654A CN113497654A CN202010266357.XA CN202010266357A CN113497654A CN 113497654 A CN113497654 A CN 113497654A CN 202010266357 A CN202010266357 A CN 202010266357A CN 113497654 A CN113497654 A CN 113497654A
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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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Abstract
An embodiment of the present invention provides an optical fiber distributed system, including: the system comprises a radio remote unit RRU, an access unit and a coverage unit; one end of the access unit is connected with an antenna of the RRU through a wired feeder line, and the other end of the access unit is connected with the covering unit through a composite optical cable; the access unit is used for converting the data sent by the RRU into digital signals, processing the digital signals according to the frame structure and the data arrangement of the digital signals, and sending the processed digital signals to the covering unit. The optical fiber distributed system provided by the embodiment of the invention enhances the coverage area, realizes scenes such as room coverage and the like, and solves the problem of deep coverage.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an optical fiber distributed system.
Background
A wireless communication system generally includes a base station and a Remote Radio Unit (RRU), and in data transmission based on the wireless communication system, the data transmission performance is poor due to the limitation of a long transmission distance, so a repeater serving as a relay node is added in the wireless communication system. Fig. 1 is a schematic diagram of data transmission based on a wireless communication system in the prior art, and as shown in fig. 1, in the prior art, data transmission is performed in a manner of using a wireless signal between a repeater serving as a relay node and a relayed RRU, and then coverage is performed through the repeater, so that a coverage range is expanded. Multiple repeaters can be deployed in the coverage area of the RRU, or the repeaters jump once or several times, so that data transmission at a longer distance is realized.
However, in the above data transmission method between the repeater and the RRU, the SNR (signal to noise ratio) is seriously reduced, and the repeater and the RRU also interfere with each other, especially the interference of the edge user between the repeater and the RRU is serious. Secondly, if the repeater performs the second hop, the SNR will be further deteriorated, resulting in further degradation of the demodulation performance of the signal.
In addition, in an indoor distribution scene, direct coverage cannot be performed through external wireless nodes in a wireless relay mode under objective conditions such as floor partitions, wall barriers and the like.
Disclosure of Invention
To solve the problems in the prior art, an embodiment of the present invention provides an optical fiber distribution system, including:
the system comprises a radio remote unit RRU, an access unit and a coverage unit; one end of the access unit is connected with an antenna of the RRU through a wired feeder line, and the other end of the access unit is connected with the covering unit through a composite optical cable;
the access unit is used for converting the data sent by the RRU into digital signals, processing the digital signals according to the frame structure and the data arrangement of the digital signals, and sending the processed digital signals to the covering unit.
The optical fiber distribution system further comprises a base station which is in communication connection with the coverage unit; correspondingly, the access unit is further configured to:
calculating the SNR detection result of the sub-band channel corresponding to each covering unit;
and sending all SNR detection results to the base station.
Wherein the base station is configured to:
receiving all SNR detection results, and distributing target covering units attached to the edge terminals according to all SNR detection results; the edge terminal is a terminal covered by at least two covering units;
the allocating target coverage units attached to the edge terminals according to all the SNR detection results comprises:
and determining a covering unit corresponding to the SNR detection result with the maximum value as the target covering unit, and distributing the edge terminal to the target covering unit.
Wherein the base station is configured to:
performing subband rearrangement on the subband channel corresponding to the covering unit;
the performing subband rearrangement on the subband channel corresponding to the covering unit includes:
and rearranging the sub-band channels corresponding to the covering units to the same frequency band.
Wherein, the covering units are multiple; correspondingly, the access unit is used for:
after the sub-band rearrangement is finished, summarizing the data of the plurality of covering units;
and forwarding the summarized data to the RRU.
The optical fiber distributed system is of an LTE230-G standard.
Wherein the access unit is configured to:
and converting the data sent by the RRU into digital signals, processing according to the frame structure and data arrangement of the digital signals of the LTE230-G system, and sending the processed digital signals to the covering unit.
Wherein the access unit is further configured to:
and converting the data sent by the RRU into digital signals, processing according to the frame structure and data arrangement of the digital signals of the LTE230-G system, and sending the processed digital signals to the covering unit through an optical fiber interface.
Wherein, the covering unit is a distributed antenna, a sucker antenna or a mushroom head antenna.
And the covering unit adopts the same frequency or different frequency to configure the sub-band.
The optical fiber distributed system provided by the embodiment of the invention realizes the purposes of converting data sent by the RRU into digital signals, processing the data and sending the processed data to the covering unit by introducing the access unit, respectively connecting the antenna of the RRU through a wired feeder line and connecting the covering unit through the composite optical cable, thereby enhancing the covering range, realizing scenes such as indoor coverage and the like and solving the problem of deep coverage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a diagram illustrating data transmission in a wireless communication system according to the prior art;
FIG. 2 is a flow chart of an embodiment of a fiber distribution system of the present invention;
fig. 3 is a schematic diagram of a coverage unit covering a terminal according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of allocating target overlay units attached to edge terminals according to an embodiment of the present invention;
FIG. 5 is a schematic illustration of a band rearrangement in accordance with an embodiment of the present invention;
fig. 6 is a schematic diagram of a depth coverage scene applied in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 2 is a flowchart of an embodiment of an optical fiber distribution system according to the present invention, and as shown in fig. 2, an embodiment of the present invention provides an optical fiber distribution system, which includes:
a radio remote unit RRU101, an access unit 102 and a coverage unit 103; one end of the access unit 102 is connected to an antenna of the RRU101 through a wired feeder line, and the other end of the access unit 102 is connected to the coverage unit 103 through a composite optical cable; that is, the access unit 102 and the antenna of the RRU101 are connected by a wired feeder, and after being processed by the access unit 102, the antenna is pulled away to the coverage unit 103 through a composite optical cable, and the coverage unit 103 performs wireless coverage, fig. 3 is a schematic diagram of a coverage unit covering a terminal according to an embodiment of the present invention, as shown in fig. 3, each coverage unit corresponds to a corresponding terminal, it should be noted that the coverage unit repeatedly covers the terminal, that is, for a certain terminal a, the coverage unit can be covered by all of the coverage units 0 to 2.
The access unit 102 is configured to convert data sent by the RRU101 into a digital signal, process the digital signal according to a frame structure and data arrangement of the digital signal, and send the processed digital signal to the coverage unit 103. The data sent by the RRU101 may specifically be an analog signal. Processing according to the frame structure and data arrangement of the digital signal is a mature technology in the field and will not be described in detail.
In the process of "processing according to the frame structure and data arrangement of the digital signal", the signal is different, the frame structure is different, and the signal processing method is also different. Therefore, in the processing process, specific analysis is required according to specific signal requirements, and details are not described here.
Further, the optical fiber distribution system may be in an LTE230-G standard, for example, a standard with a frequency band range of 230 MHz. Correspondingly, the access unit 102 is configured to: the data sent by the RRU101 is converted into digital signals, processed according to the frame structure and data arrangement of the digital signals of the LTE230-G system, and the processed digital signals are sent to the coverage unit 103. It can be understood that the data sent by the RRU101 may specifically be an analog signal.
Further, the access unit 102 is further configured to: the data sent by the RRU101 is converted into digital signals, processed according to the frame structure and data arrangement of the LTE230-G standard digital signals, and the processed digital signals are sent to the coverage unit 103 through an optical fiber interface.
Further, the covering unit 103 may be embodied as a distributed antenna, a chuck antenna, or a mushroom head antenna. I.e. the coverage unit 103 may be an indoor or outdoor distribution system, a device at the back end of a base station. Such as a distributed antenna, a chuck antenna, or a mushroom head antenna, etc.
The coverage unit 103 may perform wireless coverage and may perform subband configuration. Because the covered floors or positions are different, the sub-bands of the covering unit 103 may be frequency band repeated, use the same sub-band, or use different frequency configuration. That is, the covering unit 103 adopts the same frequency or different frequency configuration sub-band.
The optical fiber distribution system further comprises a base station which is in communication connection with the coverage unit 103; correspondingly, the access unit 102 is further configured to: calculating the SNR detection result of the sub-band channel corresponding to each covering unit 103; sending all SNR detection results to the base station; correspondingly, the base station is configured to: receiving all SNR detection results, and distributing target covering units attached to the edge terminals according to all SNR detection results; the edge terminal is a terminal covered by at least two covering units; the allocating target coverage units attached to the edge terminals according to all the SNR detection results comprises: and determining a covering unit corresponding to the SNR detection result with the maximum value as the target covering unit, and distributing the edge terminal to the target covering unit.
Fig. 4 is a schematic diagram illustrating allocation of a target coverage unit to which an edge terminal is attached according to an embodiment of the present invention, as shown in fig. 4, an edge terminal (corresponding to the UE in fig. 4) is covered by a coverage unit 0 (corresponding to the coverage 0 in fig. 4) and a coverage unit 1 (corresponding to the coverage 1 in fig. 4), an SNR detection result corresponding to the coverage unit 0 is-100 dB, an SNR detection result corresponding to the coverage unit 1 is-115 dB, and an SNR detection result corresponding to the coverage unit 0 is better than an SNR detection result corresponding to the coverage unit 1, so that the coverage unit 0 is determined as the target coverage unit, that is, the UE is allocated to the coverage unit 0.
That is, at the edge terminal, according to the SNR of two or more coverage units 103, the attached coverage unit 103 of the terminal can be allocated, and the allocation is preferentially performed, so that the backup function of the coverage can be realized, and the edge terminal is ensured not to be disconnected under the condition of the deteriorated SNR.
The base station is configured to: performing subband rearrangement on a subband channel corresponding to the covering unit 103; the performing subband rearrangement on the subband channel corresponding to the covering unit 103 includes: and rearranging the sub-band channels corresponding to the covering unit 103 to the same frequency band. In the case of non-overlapping coverage, the coverage areas of different coverage units are independent, and the total number of subbands and the subband processing capacity of not more than one cell are required.
Fig. 5 is a schematic diagram of a band rearrangement according to an embodiment of the present invention, as shown in fig. 5, different filling contents respectively correspond to different coverage units 103 of different floors, and after sub-band rearrangement, the same frequency band can be used for different floors (under the condition of little interference). And further, the utilization rate of the frequency spectrum resources can be improved, and the frequency spectrum resources are saved.
The subband rearrangement process may specifically include: the access unit 102 calculates the SNR and reports it to the base station, and the base station reconfigures the sub-band (i.e., rearranges the sub-band) for the different coverage units 103 according to the reported SNR.
Further, there are a plurality of the covering units 103; correspondingly, the access unit 102 is configured to: after the subband rearrangement is completed, summarizing the data of the plurality of covering units 103; and forwarding the summarized data to the RRU 101.
Fig. 6 is a schematic diagram of a depth coverage scene applied in the embodiment of the present invention, as shown in fig. 6, which can be applied to buildings, large venues and houses. The 230 access unit in fig. 6 corresponds to the access unit 102 of LTE230-G standard.
After the indoor coverage is realized, the deployment cost of the base station can be reduced, and the low-cost coverage is realized in the area with deep blind patching. Compared with the scheme of the repeater, the repeater has obvious advantages in the aspects of covering buildings, basements and the like.
The optical fiber distributed system provided by the embodiment of the invention realizes the purposes of converting data sent by the RRU into digital signals, processing the data and sending the processed data to the covering unit by introducing the access unit, respectively connecting the antenna of the RRU through a wired feeder line and connecting the covering unit through the composite optical cable, thereby enhancing the covering range, realizing scenes such as indoor coverage and the like and solving the problem of deep coverage.
On the basis of the above embodiment, the optical fiber distribution system further includes a base station communicatively connected to the coverage unit 103; correspondingly, the access unit 102 is further configured to:
calculating the SNR detection result of the sub-band channel corresponding to each covering unit 103;
and sending all SNR detection results to the base station.
The optical fiber distributed system provided by the embodiment of the invention is beneficial to further enhancing the coverage range, realizing scenes such as room division coverage and the like and solving the problem of deep coverage.
On the basis of the above embodiment, the base station is configured to:
receiving all SNR detection results, and distributing target covering units attached to the edge terminals according to all SNR detection results; the edge terminal is a terminal covered by at least two covering units 103;
the allocating target coverage units attached to the edge terminals according to all the SNR detection results comprises:
and determining a covering unit corresponding to the SNR detection result with the maximum value as the target covering unit, and distributing the edge terminal to the target covering unit.
The optical fiber distributed system provided by the embodiment of the invention ensures the signal quality of the edge terminal.
On the basis of the above embodiment, the base station is configured to:
performing subband rearrangement on a subband channel corresponding to the covering unit 103; the performing subband rearrangement on the subband channel corresponding to the covering unit 103 includes:
and rearranging the sub-band channels corresponding to the covering unit 103 to the same frequency band.
The optical fiber distributed system provided by the embodiment of the invention improves the utilization rate of frequency spectrum resources and saves the frequency spectrum resources.
On the basis of the above embodiment, there are a plurality of the covering units 103; correspondingly, the access unit 102 is configured to:
after the subband rearrangement is completed, summarizing the data of the plurality of covering units 103;
and forwarding the summarized data to the RRU 101.
The optical fiber distributed system provided by the embodiment of the invention further improves the utilization rate of frequency spectrum resources and saves the frequency spectrum resources.
On the basis of the above embodiments, the optical fiber distribution system is of LTE230-G standard.
The optical fiber distributed system provided by the embodiment of the invention is further applied to an LTE230-G system and has a specific application scene.
On the basis of the above embodiment, the access unit 102 is configured to:
the data sent by the RRU101 is converted into digital signals, processed according to the frame structure and data arrangement of the digital signals of the LTE230-G system, and the processed digital signals are sent to the coverage unit 103.
The optical fiber distributed system provided by the embodiment of the invention is beneficial to further enhancing the coverage range, realizing scenes such as room division coverage and the like and solving the problem of deep coverage.
On the basis of the foregoing embodiment, the access unit 102 is further configured to:
the data sent by the RRU101 is converted into digital signals, processed according to the frame structure and data arrangement of the LTE230-G standard digital signals, and the processed digital signals are sent to the coverage unit 103 through an optical fiber interface.
The optical fiber distributed system provided by the embodiment of the invention is beneficial to further enhancing the coverage range, realizing scenes such as room division coverage and the like and solving the problem of deep coverage.
On the basis of the above embodiment, the covering unit 103 is a distributed antenna, a sucker antenna or a mushroom head antenna.
The optical fiber distributed system provided by the embodiment of the invention can select specific covering units more specifically.
On the basis of the above embodiments, the covering unit 103 configures subbands with the same frequency or different frequencies.
The optical fiber distributed system provided by the embodiment of the invention improves the flexibility of configuring the sub-band.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the embodiments can be implemented by hardware related to program instructions, and the program can be stored in a computer readable storage medium, and when executed, the program performs the steps including the embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A fiber optic distribution system, comprising:
the system comprises a radio remote unit RRU, an access unit and a coverage unit; one end of the access unit is connected with an antenna of the RRU through a wired feeder line, and the other end of the access unit is connected with the covering unit through a composite optical cable;
the access unit is used for converting the data sent by the RRU into digital signals, processing the digital signals according to the frame structure and the data arrangement of the digital signals, and sending the processed digital signals to the covering unit.
2. The fiber optic distribution system of claim 1, further comprising a base station communicatively coupled to the coverage unit; correspondingly, the access unit is further configured to:
calculating the SNR detection result of the sub-band channel corresponding to each covering unit;
and sending all SNR detection results to the base station.
3. The fiber optic distribution system of claim 2, wherein the base station is configured to:
receiving all SNR detection results, and distributing target covering units attached to the edge terminals according to all SNR detection results; the edge terminal is a terminal covered by at least two covering units;
the allocating target coverage units attached to the edge terminals according to all the SNR detection results comprises:
and determining a covering unit corresponding to the SNR detection result with the maximum value as the target covering unit, and distributing the edge terminal to the target covering unit.
4. The fiber optic distribution system of claim 2, wherein the base station is configured to:
performing subband rearrangement on the subband channel corresponding to the covering unit;
the performing subband rearrangement on the subband channel corresponding to the covering unit includes:
and rearranging the sub-band channels corresponding to the covering units to the same frequency band.
5. The fiber optic distribution system of claim 4, wherein there are a plurality of the overlay units; correspondingly, the access unit is used for:
after the sub-band rearrangement is finished, summarizing the data of the plurality of covering units;
and forwarding the summarized data to the RRU.
6. The fiber optic distribution system of claim 1, wherein the fiber optic distribution system is of the LTE230-G standard.
7. The fiber optic distribution system of claim 6, wherein the access unit is configured to:
and converting the data sent by the RRU into digital signals, processing according to the frame structure and data arrangement of the digital signals of the LTE230-G system, and sending the processed digital signals to the covering unit.
8. The fiber optic distribution system of claim 7, wherein the access unit is further configured to:
and converting the data sent by the RRU into digital signals, processing according to the frame structure and data arrangement of the digital signals of the LTE230-G system, and sending the processed digital signals to the covering unit through an optical fiber interface.
9. The fiber optic distribution system of claim 1, wherein the cover unit is a distributed antenna, a chuck antenna, or a mushroom-head antenna.
10. The optical fiber distribution system according to claim 9, wherein the covering unit employs sub-bands configured in the same frequency or different frequencies.
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| CN202010266357.XA CN113497654A (en) | 2020-04-07 | 2020-04-07 | Optical fiber distributed system |
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| CN202010266357.XA CN113497654A (en) | 2020-04-07 | 2020-04-07 | Optical fiber distributed system |
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Application publication date: 20211012 |