CN102571212B - Indoor optical fiber distribution system - Google Patents

Abstract

The present invention relates to a kind of indoor optical fiber distribution system, this indoor optical fiber distribution system comprises access multiservice platform (MSAP), light crosspoint (OSU) and light radio frequency unit (ORU).Access multiservice platform (MSAP) carries out two-way digital data transmission by optical fiber and light crosspoint.In the downlink, access multiservice platform in a broadcast manner to light crosspoint signal transmission, after light crosspoint processes signal by optical fiber to light radio frequency unit transmitting radio frequency signal.A light crosspoint can connect multiple small-power light radio frequency unit, covers to realize multiple spot.Indoor optical fiber distribution system of the present invention can realize the multiple services common access of many nets, and favourable multiple access heterogeneous network is built, and solves many nets and coexists, be conducive to Joint construction and sharing, networking mode achieves large-scale network-estabilishing, meets large scene and covers.

Description

Indoor optical fiber distribution system

[technical field]

The present invention relates to quorum sensing inhibitor technology, particularly, relate to a kind of indoor optical fiber distribution system, this indoor optical fiber distribution system is particularly useful for large scene, the multi-modulation scheme of complex environment, the common access of multi-service and cable broadband business and networking.

[background technology]

Along with the high speed large-scale development of mobile communication, in-door covering becomes an important process of network engineering construction and optimization.Because building has serious shielding action to wireless signal, still there is the weak area of coverage of signal, blind area and shadow region mobile phone and cannot use in heavy construction, from the overlap of around different base station signal, produce ping-pong, mobile phone frequently switches, even call drop, has had a strong impact on the normal use of mobile phone, in addition, in some building, although mobile phone can normal talking, user density is large, BTS channel is crowded, and mobile phone is reached the standard grade difficulty.Visible, mobile terminal remains in stable, the communication reliably of indoor the problem that indoor distributed system is badly in need of solving further.

Indoor covering system is primarily of signal source and signal distributing system two parts composition.The Indoor Coverage Solution of existing co-axial cables transport mode, due to very large to the loss otherness of different frequency signals, is difficult to meet the unified platform requirement that various wireless communication network accesses simultaneously; Meanwhile, the loss in indoor distributed system makes greatly signal source draw to connect that electromagnetic radiation when large, the high-power radiofrequency signal of power is transmitted in compartment system is large, user's terminal transmitting power large, the outstanding problems such as difficulty is large are coordinated in control of investment and enforcement.Meanwhile, in the face of comprising the mobile communications network of the different systems such as GSM900, GSM1800, CDMA, WCDMA, TD-SCDMA, WLAN.Many net construction overlapping investment are serious, constructional difficulties, and the unified covering problem solving multiple network ShareBuilder thing indoor becomes a networking person's difficult problem.

Therefore, a kind of networking demand, the compartment system of supporting multi-modulation scheme, multi-service fusion that can meet common carrier multi-services operation is needed badly.

[summary of the invention]

The invention provides the indoor optical fiber distribution system supporting multi-modulation scheme, this indoor optical fiber distribution system comprises access multiservice platform (MSAP), light crosspoint (OSU) and light radio frequency unit (ORU).Described access multiservice platform comprises information source interface, signal processing apparatus and digital light mouth.Described smooth crosspoint comprises digital light mouth, signal processing apparatus and optical transceiver module; The digital light mouth of light crosspoint carries out the two-way communication of digital signal by the digital light mouth of optical fiber and described access multiservice platform.Described smooth radio frequency unit comprises antenna and optical transceiver module; The optical transceiver module of light radio frequency unit carries out the two-way communication of radiofrequency signal by the optical transceiver module of optical fiber and light crosspoint.

As a kind of preferred version, described access multiservice platform also has Switching Module for expansion cascading and expansion light mouth.

As a kind of preferred version, described access multiservice platform comprises multiplexer; Described information source interface, multiplexer are connected the signal to receive and dispatch different systems with signal processing apparatus communication.

As a kind of preferred version, described access multiservice platform by a broadcast manner by optical fiber to light crosspoint signal transmission.

As a kind of preferred version, transmission of digital signals in a time multiplexed way between described access multiservice platform and light crosspoint.

As a kind of preferred version, described indoor optical fiber distribution system also comprises WLAN (wireless local area network) (WLAN) access point or switch that are connected to described smooth crosspoint, and described multi-service receiving platform has interface for receiving wireless lan signal.

As a kind of preferred version, described indoor optical fiber distribution system comprises some smooth crosspoints, described some smooth crosspoints adopt tree-shaped, star-like, chain and/or ring topology, and the light crosspoint of upper level forwards a signal to the light crosspoint of next stage with broadcast mode.

As a kind of preferred version, each smooth crosspoint is connected to realize multiple spot with multiple small-power light radio frequency unit and covers.

As a kind of preferred version, described indoor optical fiber distribution system comprises at least two access multiservice platforms, and described at least two access multiservice platforms adopt cascade system or form ring topology with described smooth crosspoint.

As a kind of preferred version, described smooth radio frequency unit has some surface antennas.

As a kind of preferred version, described access multiservice platform has the monitoring and management that communication interface and computer carry out communicating to accept described computer.

The indoor digital optical fiber distribution system that preferred embodiment of the present invention provides has following beneficial effect:

1. can realize the multiple services common access of many nets, favourable multiple access heterogeneous network is built;

2. solve many nets to coexist, be conducive to Joint construction and sharing;

3. promote traffic absorbability to a certain extent;

4. on networking mode, achieve large-scale network-estabilishing, meet large scene and cover;

5. flexible topological structure, the scene scale that energy flexible adaptation is different;

[accompanying drawing explanation]

Fig. 1 is UWB indoor digital fiber compartment system schematic diagram provided by the invention;

Fig. 2 is the UWB indoor digital fiber compartment system configuration diagram of multi-stage cascade of the present invention;

Fig. 3 is that traditional distributed system and UWB indoor digital fiber compartment system transfer of data of the present invention compare schematic diagram;

Fig. 4 is UWB indoor digital fiber compartment system group-network construction figure of the present invention;

Fig. 5 is that UWB indoor digital fiber compartment system of the present invention is moving the application schematic diagram in fusion admittedly;

Fig. 6 is that UWB indoor digital fiber compartment system of the present invention realizes many nets common access application scenarios schematic diagram.

[embodiment]

Indoor digital optical fiber distribution system provided by the invention comprises by the service access equipment of Fiber connection, switching equipment and radio-frequency apparatus.Wherein, service access equipment comprises at least one access multiservice platform (MSAP), and switching equipment comprises at least one light crosspoint (OSU), and radio-frequency apparatus comprises at least one light radio frequency unit (ORU).

The present invention adopts advanced Digital Signal Processing, by the radio-frequency signal source of different systems input access multiservice platform (MSAP), carry out digitized processing, mainly comprise the sampling of signal, Digital up and down convert, the process etc. of digital filtering process and digital transmission protocol, be transmitted through the fiber to light crosspoint (OSU) again, OSU carries out digital processing and filtering etc. to the digital signal of different systems, the each smooth radio frequency unit (ORU) in region is distributed to again through optical fiber, then revert to original radiofrequency signal and cover a specific region by antenna-feedback system.

Below in conjunction with drawings and Examples, the invention will be further described.

Shown in following Fig. 1 and Fig. 2, this system comprises access multiservice platform (MSAP), light crosspoint (OSU) and light radio frequency unit (ORU), connect the MSAP digital light mouth of OSU, and for the Switching Module of expanding networking cascade function and expansion light mouth thereof.

Described MSAP refers to the equipment that can realize the access of different operators various standard information source, digitized processing and distribution.Described smooth crosspoint (OSU) carries out the digitized processing of upward signal and distributing again of downstream signal data.Described smooth radio frequency unit (ORU) carries out zooming out and being connected antenna-feedback system, amplifies and filtering for realizing user's uplink and downlink signal.

For down link, after MSAP receives source signal, by being down-converted to intermediate-freuqncy signal to different systems radiofrequency signal, and carry out corresponding Digital Signal Processing, comprise signal sampling, Digital up and down convert, digital filtering process and digital transmission protocol process etc., obtain the digital signal of different systems.Then in a broadcast manner by MSAP digital light mouth and Optical Fiber Transmission to OSU.After OSU receives digital signal, the OSU of next stage is then forwarded to broadcast mode, if OSU is not final stage (being illustrated in fig. 2 shown below the multistage tree of employing), continue to forward downwards, OSU also carries out corresponding Digital Signal Processing simultaneously, and be converted to analog if signal, then be modulated to radiofrequency signal with crossing Optical Fiber Transmission to the ORU be attached thereto.Should recognize, each OSU can connect multiple ORU, preferably, connects small-power ORU, covers to realize multiple spot as required.ORU exports multi-modulation scheme radiofrequency signal, owing to have employed Optical Fiber Transmission, so loss is few by antenna-feedback system.Should recognize, an ORU can be with some surface antennas as required.Be digital signal due to what transmit between MSAP and OSU, greatly can reduce the interference to user on other passages of this community like this.

For up link, each ORU, by after nearest channel reception to subscriber signal, is transmitted to the OSU be attached thereto, if the upper level of OSU is not MSAP, then continues superior OSU and forwards, until be forwarded to MSAP.Meanwhile, radiofrequency signal is down-converted to intermediate-freuqncy signal by OSU, and carries out corresponding Digital Signal Processing, obtains the digital signal of different systems, in a time multiplexed way by Optical Fiber Transmission to MSAP.After MSAP receives the digital signal from each OSU, transfer the intermediate-freuqncy signal of simulation to, then be modulated to radiofrequency signal and be sent to information source.User mobile phone signal is received by nearest passage, then passes to MSAP from this passage through ORU and optical fiber, so also greatly can reduce the interference on different passage between user.

MSAP has monitoring function, is entering in the middle of network process, can access MSAP and arrange relevant parameter (such as, frequency, gain, auto level control etc.), can also check warning information by PC.So not only can distinguish each OSU and ORU parameter of adjustment System easily and adapt to different chamber's environment with " drip irrigation type covering ", absorb telephone traffic dramatically, and make network parameter meet operator's check index and user awareness.

Especially, for WLAN (WLAN (wireless local area network)) signal, as shown in Figure 1 after MSAP access, directly can connect WLAN terminal AP (access point) or switch at the port of OSU, cover the region of actual needs.

As shown in Figure 3, in data transfer mode, replace traditional radio frequency transmission by time division multiplexing (TDM) mode with anchor-frame format transmission 2G, the 3G be isolated from each other and WLAN data, then close road in the final stage of signal, solve the transmission of many nets co-existence data.

As shown in Figure 4, on network construction form, support star-like, chain, annular networking, but all mainly comprise information source and optical switching system.For important room area, annular networking mode can be adopted, when the link connecting current MSAP disconnects maybe when some MSAP fault, corresponding connect current MSAP OSU or the OSU of whole links will automatically be connected to another MSAP, and adjust clock in time, at utmost improve system reliability.Networking mode flexibly, is easily met and is connected to realize multiple spot covering by multiple small-power light radio frequency unit, especially for CDMA, WCDMA self-interference system, more need the coverage mode of small-power multiple antennas according to minimum coupling principle.

As shown in Figure 5, system can, according to actual application environment in conjunction with EPON flexible deployment, realize admittedly moving fusion, simultaneously also can by OSU function i ntegration in ORU.

If be applied to large-scale, ultra-large type scene covering, covering for realizing scale, cascade system can adopt optical fiber be connected, to expand networking capability with expansion light mouth by MSAP digital light mouth.Now Switching Module will only be used as the forwarding of digital signal.

In addition, this system also can be applied to many nets according to actual needs and jointly access application, and be illustrated in fig. 6 shown below, a set of equipment has merged the function of multiple network equipment such as mobile communication 2G, 3G, LTE, WLAN, CMMB, FTTB, FTTH.Meanwhile, the optical fiber communication mode constructability adopted, can meet the covering in the places such as Big Residential District, airport, stadium and skyscraper at the same time, and grant large-scale villa quarter etc. in conjunction with EPON cloth.

For the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.

Claims (9)

1. an indoor optical fiber distribution system, is characterized in that, comprising:

Access multiservice platform (MSAP), described access multiservice platform comprises information source interface, signal processing apparatus and digital light mouth; The signal processing apparatus of described access multiservice platform (MSAP) is down-converted to intermediate-freuqncy signal the radiofrequency signal from information source interface and carries out corresponding Digital Signal Processing;

Light crosspoint (OSU), described smooth crosspoint comprises digital light mouth, signal processing apparatus and optical transceiver module; The digital light mouth of light crosspoint carries out the two-way communication of digital signal by the digital light mouth of optical fiber and described access multiservice platform; The signal processing apparatus of described smooth crosspoint (OSU) is converted to analog if signal the digital signal from access multiservice platform (MSAP), then is modulated to radiofrequency signal;

Light radio frequency unit (ORU), described smooth radio frequency unit comprises antenna and optical transceiver module; The optical transceiver module of light radio frequency unit carries out the two-way communication of radiofrequency signal by the optical transceiver module of optical fiber and light crosspoint;

Wherein, the signal processing apparatus of described smooth crosspoint (OSU) is down-converted to intermediate-freuqncy signal the radiofrequency signal from light radio frequency unit (ORU), and carries out corresponding Digital Signal Processing;

Described access multiservice platform also has Switching Module for expansion cascading and expansion light mouth; The signal processing apparatus of described access multiservice platform (MSAP) is converted to analog if signal the signal from described smooth crosspoint (OSU), then is modulated to radiofrequency signal.

2. indoor optical fiber distribution system according to claim 1, is characterized in that, described access multiservice platform in a broadcast manner by optical fiber to light crosspoint signal transmission.

3. indoor optical fiber distribution system according to claim 2, is characterized in that, transmission of digital signals in a time multiplexed way between described access multiservice platform and light crosspoint.

4. indoor optical fiber distribution system according to claim 2, it is characterized in that, described indoor optical fiber distribution system also comprises WLAN (wireless local area network) (WLAN) access point or switch that are connected to described smooth crosspoint, and described multi-service receiving platform has interface for receiving wireless lan signal.

5. indoor optical fiber distribution system according to claim 2, it is characterized in that, described indoor optical fiber distribution system comprises some smooth crosspoints, described some smooth crosspoints adopt tree-shaped, star-like, chain and/or ring topology, and the light crosspoint of upper level forwards a signal to the light crosspoint of next stage with broadcast mode.

6. indoor optical fiber distribution system according to claim 2, is characterized in that, each smooth crosspoint is connected to realize multiple spot with multiple small-power light radio frequency unit and covers.

7. indoor optical fiber distribution system according to claim 1, it is characterized in that, described indoor optical fiber distribution system comprises at least two access multiservice platforms, and described at least two access multiservice platforms adopt cascade system or form ring topology with described smooth crosspoint.

8. indoor optical fiber distribution system according to claim 1, is characterized in that, described smooth radio frequency unit has some surface antennas.

9. indoor optical fiber distribution system according to claim 1, is characterized in that, described access multiservice platform has the monitoring and management that communication interface and computer carry out communicating to accept described computer.