CN210380856U - Wireless optical fiber type multi-service digital distributed system applied to construction site - Google Patents
Wireless optical fiber type multi-service digital distributed system applied to construction site Download PDFInfo
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- CN210380856U CN210380856U CN201920861479.6U CN201920861479U CN210380856U CN 210380856 U CN210380856 U CN 210380856U CN 201920861479 U CN201920861479 U CN 201920861479U CN 210380856 U CN210380856 U CN 210380856U
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Abstract
The utility model discloses a be applied to wireless optic fibre type multiservice digital distributed system in building site, including inserting unit and a plurality of cover unit, it is used for receiving communication signal and carries out digital processing to communication signal to insert the unit, the cover unit receives the signal after the digital processing that comes from inserting the unit, and it goes or weak coverage area slowly to cover the closure of low traffic with the signal, wherein: the access unit receives wireless signals of the base station through an antenna or directly couples radio frequency signals of the base station through a feeder line, and one access unit can be connected with a plurality of coverage units in parallel. The utility model discloses an access unit is connected with a plurality of cover units, and the access unit carries out digital processing to the signal to avoid the self-excitation problem that the wireless device may appear; meanwhile, digital signals are transmitted, the loss rate is high, the system gain is stable, and the interference probability to a base station is reduced; making the signal coverage more optimal.
Description
Technical Field
The utility model relates to a wireless optical fiber distributes the field, concretely relates to be applied to wireless optical fiber type multiservice digital distributed system in building site.
Background
The construction site general system applies 'internet +' thinking to the traditional concrete industry, and utilizes technical means such as internet of things, cloud storage and mobile internet to realize information sharing among all departments in an enterprise, get through communication barriers between a concrete enterprise and a supply construction site, transversely realize integrated operation management of enterprise business, provide functions including production management, intelligent scheduling, vehicle positioning, video monitoring, construction site management and the like for the enterprise, realize seamless butt joint of production data, vehicle data and construction site information, help concrete enterprises to comprehensively master production operation conditions, improve communication efficiency with the construction site, strengthen contact with construction enterprises and reduce operation cost of the enterprise.
In the prior art, optical fibers between the concrete enterprise and the goods supply construction site are laid out in a repeater mode.
However, the repeater layout fiber has the following disadvantages:
(1) the system capacity cannot be increased.
(2) After the repeater is introduced, noise above about 3dB is added to the base station, so that the working environment of the original base station is deteriorated, the coverage radius is reduced, and therefore, one sector of one base station can only work with less than two repeaters.
(3) The repeater can only frequency division but not code division, and one repeater usually amplifies signals of a plurality of base stations or a plurality of sectors. After too many repeaters are introduced, the short code phase confusion of the base station causes serious pilot pollution, the optimization work is difficult, and meanwhile, unnecessary soft handover is increased.
(4) The network management function and the equipment detection function of the repeater are far inferior to those of the base station, and the repeater is not easy to be noticed after a problem occurs.
(5) Because of the limitation of the requirement of isolation, some installation conditions of the repeater are much harsher than those of the base station, so that the performance of the repeater cannot be fully exerted.
(6) If the repeater is self-excited or an interference source exists near the repeater, the original network is seriously influenced. The damage effect of the interference can be enlarged in a large area due to the higher working antenna of the repeater. CDMA is an intra-frequency system, and peripheral base stations may be jammed and broken down.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a wireless optic fibre type multiservice digital distributed system who is applied to building site that the performance is good, the wide one of coverage.
In order to achieve the purpose, the utility model adopts the following technical scheme: a wireless optical fiber type multi-service digital distribution system for a construction site, comprising an access unit for receiving and digitizing communication signals and a plurality of coverage units for receiving the digitized signals from the access unit and covering low-traffic closure slowdown or weak coverage areas with the signals, wherein:
the access unit receives wireless signals of the base station through an antenna or directly couples radio frequency signals of the base station through a feeder line, and one access unit can be connected with a plurality of coverage units in parallel;
the covering unit comprises an external antenna covering unit and/or a directional antenna covering unit.
Furthermore, the access unit adopts a single-channel transmission channel, and the coverage unit adopts a dual-channel transmission channel.
Furthermore, the covering unit is divided into an uplink covering unit and a downlink covering unit by adopting double channels, the access unit is divided into two channels after feeding signals in a single channel and then digitally processing the signals and transmitting the signals to the covering unit,
one path of signals containing MIMO signals enters the uplink covering unit, the other path of signals enters the downlink covering unit, and the two paths of signals are combined into one path of signals to be transmitted to the access unit after being processed digitally in the uplink covering unit and the downlink covering unit.
Furthermore, the frequency bands of the wireless signals and the radio frequency signals are a GSM + TDD-LTE E frequency band, a GSM + TDD-LTED frequency band and/or a GSM + TDD-LTE F frequency band.
Further, the transmission bandwidth of the wireless signals and the radio frequency signals is 20-40M.
Further, the number of the covering units is 8.
Further, the access unit is powered with DC48V or AC 220V.
Further, the cover unit is remotely powered using DC 48V.
The utility model discloses profitable technological effect: the utility model discloses an access unit is connected with a plurality of cover units, and the access unit carries out digital processing to the signal to avoid the self-excitation problem that the wireless device may appear; meanwhile, digital signals are transmitted, the loss rate is high, the system gain is stable, and the interference probability to a base station is reduced; signal coverage is made more optimal based on power statistics of the digital signal.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the following specific embodiments.
As shown in fig. 1, a wireless optical fiber type multi-service digital distribution system applied to a construction site includes an Access Unit (Access Unit) and a plurality of coverage units (Remote units), and the Access Unit is connected with the coverage units through composite optical cables. The access unit is connected with a network management monitoring platform through an optical fiber, and the network management monitoring platform comprises a network management center and an SMSC (short message Service center) or a switch, and is responsible for relaying, storing or forwarding short messages between a base station and a mobile station (ME).
The access unit is used for receiving communication signals and carrying out digital processing on the communication signals, the covering unit receives the signals after the digital processing from the access unit and covers the signals in a closed slow-moving or weak covering area with low traffic, wherein:
the access unit receives wireless signals of the base station through an antenna or directly couples radio frequency signals of the base station through a feeder line, one access unit can be connected with a plurality of covering units in parallel, and in the embodiment, the number of the covering units is 8; the covering unit comprises an external antenna covering unit and/or a directional antenna covering unit.
Furthermore, the access unit adopts a single-channel transmission channel, and the coverage unit adopts a dual-channel transmission channel.
Furthermore, the covering unit is divided into an uplink covering unit and a downlink covering unit by adopting double channels, the access unit is divided into two channels after feeding signals in a single channel and then digitally processing the signals and transmitting the signals to the covering unit,
the MIMO (Multiple-Input Multiple-Output means that a plurality of transmitting antennas and receiving antennas are respectively used at a transmitting end and a receiving end, so that signals are transmitted and received through the plurality of antennas at the transmitting end and the receiving end, and the communication quality is improved) is included, one path of the signals enters the uplink covering unit, the other path of the signals enters the downlink covering unit, and the two paths of the signals are combined into one path to be transmitted to the access unit after being subjected to digital processing by the uplink covering unit and the downlink covering unit.
Furthermore, the frequency bands of the wireless signals and the radio frequency signals are a GSM + TDD-LTE E frequency band, a GSM + TDD-LTED frequency band and/or a GSM + TDD-LTE F frequency band.
Further, the transmission bandwidth of the wireless signals and the radio frequency signals is 20-40M.
Further, the number of the covering units is 8.
Further, the access unit is powered with DC48V or AC 220V.
Further, the cover unit is remotely powered using DC 48V.
The utility model discloses profitable technological effect:
the utility model discloses an access unit is connected with a plurality of cover units, and the access unit carries out digital processing to the signal to avoid the self-excitation problem that the wireless device may appear; meanwhile, digital signals are transmitted, the loss rate is high, the system gain is stable, and the interference probability to a base station is reduced; signal coverage is made more optimal based on power statistics of the digital signal.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. In addition, although specific terms are used in the specification, the terms are used for convenience of description and do not limit the utility model in any way.
Claims (8)
1. A wireless optical fiber type multi-service digital distribution system applied to a construction site, comprising an access unit and a plurality of coverage units, wherein the access unit is connected with the coverage units through composite optical cables, the access unit is used for receiving communication signals and carrying out digital processing on the communication signals, the coverage units receive the digital processed signals from the access unit and cover the signals in a low-traffic closed slow-moving or weak coverage area, and the wireless optical fiber type multi-service digital distribution system comprises:
the access unit receives wireless signals of the base station through an antenna or directly couples radio frequency signals of the base station through a feeder line, and one access unit can be connected with a plurality of coverage units in parallel;
the covering unit comprises an external antenna covering unit and/or a directional antenna covering unit.
2. The wireless fiber optic multiservice digital distribution system for worksites according to claim 1, wherein said access unit employs a single channel transmission channel and said overlay unit employs a dual channel transmission channel.
3. The wireless optical fiber type multi-service digital distribution system applied to construction sites as claimed in claim 2, wherein the covering unit is divided into an uplink covering unit and a downlink covering unit by two channels, the access unit is divided into two channels after being fed with signals through a single channel and then being processed digitally, and the signals are transmitted to the covering unit,
one path of signals containing MIMO signals enters the uplink covering unit, the other path of signals enters the downlink covering unit, and the two paths of signals are combined into one path of signals to be transmitted to the access unit after being processed digitally in the uplink covering unit and the downlink covering unit.
4. The wireless fiber optic multi-service digital distribution system for construction sites as claimed in claim 1, wherein the frequency band of the wireless signals and the radio frequency signals is GSM + TDD-LTE E band, GSM + TDD-LTE D band and/or GSM + TDD-LTE F band.
5. The wireless optical fiber type multi-service digital distribution system for construction sites according to claim 4, wherein the transmission bandwidth of the wireless signals and the radio frequency signals is 20-40M.
6. A wireless optical fiber type multiservice digital distribution system for a construction site according to claim 1, wherein the number of said covering units is 8.
7. The wireless fiber optic multi-service digital distribution system for worksite applications according to claim 1, wherein said access unit is powered using DC48V or AC 220V.
8. The wireless fiber optic multi-service digital distribution system for worksite application of claim 1 wherein said coverage unit is remotely powered using DC 48V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920861479.6U CN210380856U (en) | 2019-06-10 | 2019-06-10 | Wireless optical fiber type multi-service digital distributed system applied to construction site |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920861479.6U CN210380856U (en) | 2019-06-10 | 2019-06-10 | Wireless optical fiber type multi-service digital distributed system applied to construction site |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210380856U true CN210380856U (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920861479.6U Expired - Fee Related CN210380856U (en) | 2019-06-10 | 2019-06-10 | Wireless optical fiber type multi-service digital distributed system applied to construction site |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210380856U (en) |
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2019
- 2019-06-10 CN CN201920861479.6U patent/CN210380856U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20200421 Termination date: 20200610 |