CN106059660A

CN106059660A - Loopback detection method, BBU (Base Band Unit), RRU (Radio Remote Unit) and optical access network system

Info

Publication number: CN106059660A
Application number: CN201610505905.3A
Authority: CN
Inventors: 秦东; 彭肖
Original assignee: Raisecom Technology Co Ltd
Current assignee: Raisecom Technology Co Ltd
Priority date: 2016-06-30
Filing date: 2016-06-30
Publication date: 2016-10-26
Anticipated expiration: 2036-06-30
Also published as: CN106059660B

Abstract

The invention discloses a loopback detection method. The loopback detection method is applied to an optical access network system comprising an RRU (Base Band Unit) and at least one RRU (Radio Remote Unit), and comprises the following steps: the BBU sends a loopback detection signal generated according to a first control strategy to the RRU on which a loopback detection is to be performed; the RRU on which a loopback detection is to be performed, after receiving the loopback detection signal, sends a loopback answering signal generated according to a second control strategy to the BBU; the BBU after receiving the loopback answering signal sends loopback test data to the RRUon which a loopback detection is to be performed; the RRU on which a loopback detection is to be performed loops the loopback test data back to the BBU; and the BBU judges whether the received loopback test data is normal. According to the loopback detection method disclosed by the invention, a loopback detection state is entered without needing a worker to manually operate the RRU at a remote terminal, and the remote terminal loopback detection can be carried out conveniently in the network connection and fault maintenance process. The invention further discloses the BBU, the RRU and the optical access network system.

Description

A kind of loop detection method, BBU, RRU and optical access network system

Technical field

The present invention relates to technical field of photo communication, in particular a kind of loop detection method, BBU, RRU and soft exchange Network system.

Background technology

Distributed base station is as a kind of optical access network system, and because it has, low cost, environmental suitability be strong, engineering construction The advantages such as convenience, are widely used in mobile communications network.The key concept of distributed base station structure is conventional macro base station Baseband processing unit (BBU, Base Band Unit) and Remote Radio Unit (RRU, Radio Remote Unit) separate, and two Person is connected by optical fiber.When network design, baseband processing unit BBU is set with core network control equipment, wireless network control In the standby main website concentrating on machine room, it is attached with the RRU disposed on remote station by optical fiber.

As it is shown in figure 1, owing to BBU with RRU separates, CPRI (Common public can be passed through between BBU and RRU Radio interface, common public radio interface) interface protocol realizes both interconnections.CPRI defines at base station data Between reason control unit REC (Radio Equipment Control) and base transceiver unit RE (Radio Equipment) Interface relationship.By CPRI interface, star-like, the application scenarios of chain networking between BBU and multiple RRU can be realized, and green Colour circle protects (without power supply), it is possible to meet the demand of future wireless system net evolution, strengthens the dependable with function of system.

But, in existing optical access network system based on BBU and RRU, the BBU of a main website is connected by optical fiber The RRU of multiple remote stations.During network opening and Breakdown Maintenance, generally require engineer and send test at the BBU of main website Signal, this signal loops back to main website BBU, the thus optical fiber between checking BBU and RRU and remote station RRU at the RRU of remote station The most working properly.The current method realizing remote loopback at the RRU of remote station is remote station of sending someone, at the scene by artificial Method realize signal remote loopback, this method required time is long, and human cost is high.

Summary of the invention

The technical problem to be solved is to provide a kind of loop detection method, BBU, RRU and Optical Access Network system System, it is not necessary to artificial to remote station manual operation RRU entrance loopback detection state, it is possible to during network opening and Breakdown Maintenance Carry out remote station loopback detection easily.

Embodiments provide a kind of loop detection method, be applied to include baseband processing unit BBU and at least The optical access network system of one radio frequency remote unit RRU, it is characterised in that comprise the following steps:

Described BBU sends the loopback detection signal generated according to the first control strategy to the RRU of pending loopback detection；

After the RRU of described pending loopback detection receives described loopback detection signal, send according to second to described BBU The loopback answer signal that control strategy generates；

After described BBU receives described loopback answer signal, send loopback test to the RRU of described pending loopback detection Data；

The RRU of described pending loopback detection is to loopback test data described in described BBU loopback；

Described BBU judges that the described loopback test data received are the most normal.

Alternatively, described method also includes:

Described BBU sends the solution loopback signal generated according to the 3rd control strategy to the RRU of described pending loopback detection；

After the RRU of described pending loopback detection judges to receive described solution loopback signal, stop the loopback that will receive Test data ring is sent back to described BBU, sends the answer signal that unlinks back generated according to the 4th control strategy to described BBU；

Described BBU unlinks back after answer signal described in judging to receive, and determines the RRU entrance of described pending loopback detection Solve wrapped state, stop sending loopback test data to the RRU of described pending loopback detection.

Alternatively, described loopback detection signal be described BBU to the RRU of described pending loopback detection send by described The optical signal that BBU opens and closes change according to the laser instrument within the first control strategy control and produces；

Described loopback answer signal be described pending loopback detection RRU to described BBU send by described RRU according to The optical signal that laser instrument within second control strategy control opens and closes change and produces；

The RRU of described pending loopback detection judges to receive described loopback detection signal, including:

The RRU of described pending loopback detection judge internal photodetector receive the rule of optical signal whether with BBU controls laser instrument and opens and closes the first control strategy of change unanimously, is, judges to receive described loopback detection signal；

Described BBU judges to receive described loopback answer signal, including:

Described BBU judge internal photodetector receive the rule of optical signal whether with described pending loopback detection RRU control laser instrument to open and close the second control strategy of change consistent, be to judge to receive described loopback answer signal.

Alternatively, described solution loopback signal be described BBU to the RRU of described pending loopback detection send by described The optical signal that BBU opens and closes change according to the laser instrument within the 3rd control strategy control and produces；

The described answer signal that unlinks back be described pending loopback detection RRU to described BBU send by described RRU by The optical signal opening and closing change according to the laser instrument within the 4th control strategy control and produce；

The RRU of described pending loopback detection judges to receive described solution loopback signal, including:

The RRU of described pending loopback detection judge internal photodetector receive the rule of optical signal whether with BBU controls laser instrument and opens and closes the 3rd control strategy of change unanimously, is, judges to receive described solution loopback signal；

Described BBU unlinks back answer signal described in judging to receive, including:

Described BBU judge internal photodetector receive the rule of optical signal whether with described pending loopback detection RRU control laser instrument to open and close the 4th control strategy of change consistent, be, judge to receive described in unlink back answer signal.

Alternatively, between the RRU of described BBU and described pending loopback detection, persistently there is the situation of service data interaction Under, described loopback detection signal is that the laser instrument within described BBU exports effective transmission extremely under described first control strategy The business datum signal of the RRU of described pending loopback detection；

Described loopback answer signal is that the laser instrument within RRU of described pending loopback detection controls plan described second Slightly lower output is effective sends the business datum signal to described BBU.

Alternatively, described optical access network system is the chain network system that multiple RRU with BBU of cascade are connected by optical fiber System, or the Star Network system that multiple RRU with BBU is connected by optical fiber.

Alternatively, described method also includes:

Described BBU presets specific downstream wavelength and specified upstream for each RRU in described optical access network system Wavelength；

Wherein, the determination mode of the RRU of pending loopback detection is: described BBU needs described optical access network system In any one RRU when carrying out loopback detection, send loopback detection signal with the specific downstream wavelength of this RRU, it is possible to receiving should The RRU that RRU is pending loopback detection of the loopback detection signal of specific downstream wavelength；

The RRU of pending loopback detection sends loopback answer signal and loopback survey with specified upstream wavelength to described BBU Examination data；Described BBU determines pending loopback according to the upstream wavelength of the loopback answer signal received and loopback test data Detection RRU, with determined by RRU specific downstream wavelength send loopback test data.

The embodiment of the present invention additionally provides a kind of optical access network system, it is characterised in that include baseband processing unit BBU With at least one radio frequency remote unit RRU；

Described BBU, sends according to the first control strategy generation for the RRU of pending loopback detection in described system Loopback detection signal；Synchronous regime at described BBU judges that termination receives the loopback that the RRU of described pending loopback detection sends After answer signal, send loopback test data to the RRU of described pending loopback detection；Judge described pending loopback detection The loopback test data of RRU loopback are the most normal；

The RRU of described pending loopback detection, the synchronous regime for the RRU in described pending loopback detection judges end After receiving described loopback detection signal, send the loopback answer signal generated according to the second control strategy to described BBU；Connecing After receiving the loopback test data that described BBU sends, to loopback test data described in described BBU loopback.

Alternatively, the BBU in described system includes optical module and the master controller being provided with laser instrument；Each RRU all includes It is provided with the optical module of laser instrument and from controller；

The master controller of described BBU, is connected with internal optical module, for making this optical module according to the first control strategy The laser instrument comprised opens and closes change and produces described loopback detection signal；

The RRU of described pending loopback detection from controller, is connected with internal optical module, for according to the second control The laser instrument that strategy makes this optical module be comprised opens and closes change and produces described loopback answer signal.

Alternatively, the synchronous regime of the RRU of described BBU and described pending loopback detection judges that end is the optical mode of inside The state instruction LOS pin of the photodetector that block is comprised；

The master controller of described BBU, for according to the first control strategy, the laser instrument of the optical module within control enables control The level change of TxDIS pin end processed so that laser instrument opens and closes change and produces described loopback detection signal；Light within Jian Ce Whether the level change of the LOS pin of the photodetector that module is comprised meets the second control strategy, if it is, judge to connect Receive the loopback answer signal that the RRU of described pending loopback detection sends；

The RRU of described pending loopback detection from controller, for monitoring the light electrical resistivity survey that the optical module of inside is comprised Whether the level change of the LOS pin surveying device meets the first control strategy, if it is, judge to receive what described BBU sent Loopback detection signal；According to the second control strategy, the laser instrument of the optical module within control enables the electricity controlling TxDIS pin end Put down change and produce described loopback answer signal.

Alternatively, each control strategy is determined by unique corresponding control code；Each control code utilizes the binary system setting figure place Coding is constituted, and each control strategy is: when the bit in corresponding control code is for " 0 " and " 1 ", controls TxDIS pin respectively and is Different level state so that the laser instrument that this TxDIS pin is connected opens and closes；Each bit in each control code Persistent period is all higher than response time and the response time of LOS pin of TxDIS pin signal.

Alternatively, the BBU in described system also includes the main igh-speed wire-rod production line chip being connected with internal optical module；Respectively RRU the most also include respectively with internal optical module and from control unit be connected from igh-speed wire-rod production line chip；

Service data interaction is persistently had between each igh-speed wire-rod production line chip and the optical module of corresponding connection；

The laser instrument that described loopback detection signal optical module within described BBU is comprised is at described first control strategy The business datum sending the RRU to described pending loopback detection that lower output effectively receives from described main high speed processing chip Signal；

The laser instrument that described loopback answer signal optical module within the RRU of described pending loopback detection is comprised exists Under described second control strategy, output effectively sends the business datum to described BBU from described from what high speed processing chip received Signal.

Alternatively, the optical module within described BBU, for sending loopback detection to the RRU of described pending loopback detection Data, these loopback test data are the business datum of the main igh-speed wire-rod production line chip output being connected with this optical module；

The optical module within RRU of described pending loopback detection, for receiving the loopback test number that described BBU sends According to, and through described from igh-speed wire-rod production line chip loopback after, to described BBU send loopback loopback test data.

Alternatively, described BBU is additionally operable to send to the RRU of described pending loopback detection generate according to the 3rd control strategy Solution loopback signal；Synchronous regime at described BBU judges that termination receives unlinking of the RRU transmission of described pending loopback detection After returning answer signal, stop sending loopback test data to the RRU of described pending loopback detection；

The RRU of described pending loopback detection, is additionally operable to the synchronous regime at the RRU of described pending loopback detection and judges After termination receives described solution loopback signal, stop the loopback test data ring received is sent back to described BBU, and to described BBU sends the answer signal that unlinks back generated according to the 4th control strategy.

Alternatively, the number of the RRU comprised in described system is multiple；Described system also includes: be connected with described BBU Main website optical fiber expanding unit, and, with multiple remote station optical fiber expanding units of the cascade that each RRU is connected respectively； Described main website optical fiber expanding unit is connected as chain network with multiple remote station optical fiber expanding units of cascade；Described BBU Communicated with each RRU by described main website optical fiber expanding unit and described remote station optical fiber expanding unit, and communication party Formula is optical communication mode；

The main website optical fiber expanding unit that described BBU connects, for realizing the optical signal that transmits/receives mutual with described BBU Deciliter ripple；

With multiple remote station optical fiber expanding units of the cascade that each RRU is connected respectively, it is used for mutual with each RRU Transmit/receive optical signal realize deciliter ripple；

Described main website optical fiber expanding unit is additionally operable to pass through optical fiber with multiple remote station optical fiber expanding units of cascade Transmission smear signal is to the other side.

Alternatively, the number of the RRU comprised in described system is multiple；Described system also includes: be connected with described BBU Main website optical fiber expanding unit, and, a remote station optical fiber expanding unit being connected star-like with each RRU；Described main website side Fiber Optic Extension device is connected with described remote station optical fiber expanding unit；Described BBU is by described main website optical fiber expanding unit Communicate with each RRU with described remote station optical fiber expanding unit, and communication mode is optical communication mode；

The remote station optical fiber expanding unit being all connected with each RRU, for transmitting/receiving light letter to mutual with each RRU Number realize deciliter ripple；

Described main website optical fiber expanding unit and remote station optical fiber expanding unit are additionally operable to be believed by fiber-optic transfer smear Number give the other side.

Alternatively, each RRU transmits/receives the optical signal of mutually different wavelength；Described BBU transmits/receives and transmits/receives with each RRU Optical signal there is the optical signal of phase co-wavelength.

The embodiment of the present invention additionally provides a kind of loop detection method, is applied to baseband processing unit BBU, including following step Rapid:

The loopback detection signal generated according to the first control strategy is sent to the RRU of pending loopback detection；

After judgement receives the loopback answer signal of RRU transmission of described pending loopback detection, to described pending ring The RRU returning detection sends loopback test data；Wherein, described loopback answer signal is that described RRU is raw according to the second control strategy The signal become；

Judge that the described loopback test data received are the most normal.

Alternatively, described method can also include:

The solution loopback signal generated according to the 3rd control strategy is sent to the RRU of described pending loopback detection；

After judgement receives the answer signal that unlinks back of RRU transmission of described pending loopback detection, stop treating to described The RRU carrying out loopback detection sends loopback test data；Wherein, the answer signal that unlinks back described in is described pending loopback detection The signal that generates according to the 4th control strategy of RRU.

Described BBU judges to receive the loopback answer signal that the RRU of described pending loopback detection sends, including:

Described BBU judge internal photodetector receive the rule of optical signal whether with described pending loopback detection RRU control laser instrument to open and close the second control strategy rule of change consistent, be to judge to receive described loopback answer signal.

Described BBU judges to receive the answer signal that unlinks back that the RRU of described pending loopback detection sends, including:

The embodiment of the present invention additionally provides a kind of baseband processing unit BBU, including main control module and optical module；

Described main control module, sends according to the first control to the RRU of described pending loopback detection for controlling optical module The loopback detection signal of strategy generating processed；Synchronous regime at described BBU judges that termination receives described pending loopback detection After the loopback answer signal that RRU sends, control optical module and send loopback test data to the RRU of described pending loopback detection； Judge that the loopback test data of the RRU loopback of described pending loopback detection are the most normal；Wherein, described loopback answer signal is The signal that the RRU of described pending loopback detection generates according to the second control strategy；

Described optical module, for sending to the RRU of described pending loopback detection under the control of described main control module The loopback detection signal generated according to the first control strategy, receives the loopback test of the RRU loopback of described pending loopback detection Data.

Alternatively, described main control module, be additionally operable to control RRU from optical module to described pending loopback detection send by The solution loopback signal generated according to the 3rd control strategy；Synchronous regime at described BBU judges that termination receives described pending loopback After the answer signal that unlinks back that the RRU of detection sends, control described optical module and stop sending out to the RRU of described pending loopback detection Send loopback test data；Wherein, the answer signal that unlinks back described in is that the RRU of described pending loopback detection controls plan according to the 4th The signal slightly generated；

Described optical module, is additionally operable under the control of described main control module send out to the RRU of described pending loopback detection Send the solution loopback signal generated according to the 3rd control strategy.

Alternatively, described main control module, opens for the laser instrument making optical module be comprised according to the first control strategy Close change and produce described loopback detection signal；Change is opened and closed according to the laser instrument that the 3rd control strategy makes optical module be comprised And produce described solution loopback signal；

The synchronous regime of described BBU judges the state instruction LOS pipe of the photodetector that end comprised by described optical module Foot.

Alternatively, described main control module, for according to the first control strategy, the laser instrument controlling described optical module enables Control the level change of TxDIS pin end so that laser instrument opens and closes change and produces described loopback detection signal；Monitor described light Whether the level change of the LOS pin of the photodetector that module is comprised meets the second control strategy, if it is, judge to connect Receive the loopback answer signal that described RRU sends.

Alternatively, described main control module, for according to the 3rd control strategy, the laser instrument controlling described optical module enables Control the level change of TxDIS pin end so that laser instrument opens and closes change and produces described solution loopback signal；Monitor described optical mode Whether the level change of the LOS pin of the photodetector that block is comprised meets the 4th control strategy, if it is, judge to receive The answer signal that unlinks back sent to described RRU.

Alternatively, described BBU also includes the main igh-speed wire-rod production line chip being connected with described optical module；

Service data interaction is persistently had between described main igh-speed wire-rod production line chip and optical module；

The laser instrument that described loopback detection signal optical module within described BBU is comprised is at described first control strategy The business datum sending the RRU to described pending loopback detection that lower output effectively receives from described main high speed processing chip Signal.

Alternatively, described optical module, for sending loopback test data, this ring to the RRU of described pending loopback detection Return the business datum that test data are the output of described main igh-speed wire-rod production line chip.

The embodiment of the present invention additionally provides a kind of loop detection method, is applied to radio frequency remote unit RRU, including following step Rapid:

Detect whether to receive the loopback detection signal that baseband processing unit BBU sends；Wherein, described loopback detection signal It it is the signal that generates according to the first control strategy of described BBU；

After judging to receive described loopback detection signal, send the ring generated according to the second control strategy to described BBU Return answer signal；

Receive the loopback test data that described BBU sends, described loopback test data ring is postbacked and delivers to described BBU.

Alternatively, described method also includes:

Detect whether to receive the solution loopback signal that baseband processing unit BBU sends；Wherein, described solution loopback signal is institute State the signal that BBU generates according to the 3rd control strategy；

After judging to receive described solution loopback signal, the loopback test data ring received is sent back to described by stopping BBU, sends the answer signal that unlinks back generated according to the 4th control strategy to described BBU.

Judge to receive described loopback detection signal, including:

Judge that internal photodetector receives the rule of optical signal and whether controls laser instrument with BBU and open and close the of change One control strategy is consistent, is, judges to receive described loopback detection signal.

Judge to receive described solution loopback signal, including:

Judge that internal photodetector receives the rule of optical signal and whether controls laser instrument with BBU and open and close the of change Three control strategies are consistent, are, judge to receive described solution loopback signal.

Alternatively, between the RRU of described BBU and described pending loopback detection, persistently there is the situation of service data interaction Under, described loopback detection signal is that the transmission that the laser instrument within described BBU exports under described first control strategy is the most described The business datum signal of the RRU of pending loopback detection；

Described loopback answer signal is that the laser instrument within RRU of described pending loopback detection controls plan described second The business datum signal sending extremely described BBU of slightly lower output.

The embodiment of the present invention additionally provides a kind of radio frequency remote unit RRU, including from control module and optical module；

Described from control module, judge that termination receives described baseband processing unit BBU for the synchronous regime at described RRU After the loopback detection signal sent, control optical module and send the loopback response letter generated according to the second control strategy to described BBU Number；Wherein, described loopback detection signal is the signal that described BBU generates according to the first control strategy；

Described optical module, for sending according to the second control strategy to described BBU from the control of control module described The loopback answer signal generated, receives the loopback test data that described BBU sends, by the described loopback test data ring received Postback and deliver to described BBU.

Alternatively, described main control module, it is additionally operable to judge that termination receives described BBU and sends out in the synchronous regime of described RRU After the solution loopback signal sent, control optical module and send the answer signal that unlinks back generated according to the 4th control strategy to described BBU； Wherein, described solution loopback signal is the signal that described BBU generates according to the 3rd control strategy；

Described optical module, is additionally operable to control plan described transmission to described BBU from the control of control module according to the 4th The answer signal that unlinks back slightly generated.

Alternatively, described from control module, open for the laser instrument making optical module be comprised according to the second control strategy Close change and produce described loopback answer signal；Change is opened and closed according to the laser instrument that the 4th control strategy makes optical module be comprised And the answer signal that unlinks back described in producing；

The synchronous regime of described RRU judges the state instruction LOS pipe of the photodetector that end comprised by described optical module Foot.

Alternatively, described from control module, for according to the second control strategy, the laser instrument controlling described optical module enables Control the level change of TxDIS pin end so that laser instrument opens and closes change and produces described loopback answer signal；Monitor described light Whether the level change of the LOS pin of the photodetector that module is comprised meets the first control strategy, if it is, judge to connect Receive the loopback detection signal that described BBU sends.

Alternatively, described from control module, for according to the 4th control strategy, the laser instrument controlling described optical module enables Control the level change of TxDIS pin end so that laser instrument opens and closes and changes and the answer signal that unlinks back described in generation；Monitoring is described Whether the level change of the LOS pin of the photodetector that optical module is comprised meets the 3rd control strategy, if it is, judge Receive the solution loopback signal that described BBU sends.

Alternatively, described RRU also include be all connected with from control module and optical module from igh-speed wire-rod production line chip；

Described from persistently there being service data interaction between igh-speed wire-rod production line chip and described optical module；

Described loopback answer signal exports under described second control strategy by the laser instrument that described optical module is comprised to be had Imitate sends the business datum signal to described BBU from described from what high speed processing chip received.

Alternatively, described optical module, for receiving the loopback test data that described BBU sends, and through described from letter at a high speed Number process after chip loopback, send the loopback test data of loopback to described BBU.

Compared with prior art, embodiments providing a kind of intelligence loopback detection scheme, BBU is to pending loopback The RRU of detection sends the loopback detection signal generated according to the first control strategy, and the RRU of described pending loopback detection receives After described loopback detection signal, sending the loopback answer signal generated according to the second control strategy to described BBU, described BBU connects After receiving described loopback answer signal, send loopback test data, described pending ring to the RRU of described pending loopback detection Return the RRU of detection to loopback test data described in described BBU loopback, the described loopback test data that described BBU judgement receives The most normal, thus complete the loopback detection of remote station RRU.This technical scheme is without manually entering to remote station manual operation RRU Enter loopback detection state, it is possible to during network opening and Breakdown Maintenance, carry out remote station loopback detection easily.

Accompanying drawing explanation

Fig. 1 is the CPRI interface diagram used between BBU and RRU in correlation technique.

Fig. 2 (a)-(b) is loop detection method (system) flow chart of the embodiment of the present invention.

Fig. 3 is the schematic diagram of the optical module of the embodiment of the present invention.

Fig. 4 is the structural representation of a kind of optical network system of the embodiment of the present invention.

Fig. 5 is the structural representation of a kind of optical network system (chain network) of the embodiment of the present invention.

Fig. 6 is the structural representation of a kind of optical network system (Star Network) of the embodiment of the present invention.

Fig. 7 (a)-(b) is a kind of loop detection method (BBU) flow chart of the embodiment of the present invention.

Fig. 8 (a)-(b) is the BBU structural representation of the embodiment of the present invention.

Fig. 9 (a)-(b) is a kind of loop detection method (RRU) flow chart of the embodiment of the present invention.

Figure 10 (a)-(b) is the RRU structural representation of the embodiment of the present invention.

Figure 11 is a kind of optical access network system schematic diagram (remote station is not or not same place) of example 1 of the present invention.

Figure 12 is the loopback/solution loopback process chart of remote station RF processing unit.

Figure 13 is the loopback/solution loopback process chart of main website baseband processing unit.

Figure 14 is the loop back processing being schematic diagram of the igh-speed wire-rod production line module of band loop fuction.

Figure 15 is a kind of optical access network system schematic diagram (remote station is in same place) of example 2 of the present invention.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to the present invention Embodiment be described in detail.It should be noted that in the case of not conflicting, in embodiment in the application and embodiment Feature can mutual combination in any.

Embodiment one

As shown in Fig. 2 (a), the present embodiment provides a kind of loop detection method, is applied to include baseband processing unit BBU With the optical access network system of at least one radio frequency remote unit RRU, comprise the following steps:

Step S200, described BBU sends the loopback inspection generated according to the first control strategy to the RRU of pending loopback detection Survey signal；

Step S201, after the RRU of described pending loopback detection receives described loopback detection signal, sends out to described BBU Send the loopback answer signal generated according to the second control strategy；

Step S202, after described BBU receives described loopback answer signal, sends out to the RRU of described pending loopback detection Send loopback test data；

Step S203, the RRU of described pending loopback detection is to loopback test data described in described BBU loopback；

Step S204, described BBU judges that the described loopback test data received are the most normal.

As shown in Fig. 2 (b), after BBU completes for the loopback detection of RRU, following steps can be performed to realize both Between solution loopback:

Step S205, described BBU sends the solution generated according to the 3rd control strategy to the RRU of described pending loopback detection Loopback signal；

Step S206, after the RRU of described pending loopback detection judges to receive described solution loopback signal, stops receiving To loopback test data ring be sent back to described BBU, to described BBU send according to the 4th control strategy generate response of unlinking Answer signal；

Step S207, described BBU judge to receive described in unlink back after answer signal, determine described pending loopback detection RRU enter solve wrapped state, stop to described pending loopback detection RRU send loopback test data.

Wherein, described loopback detection signal initiates loopback detection for the RRU notifying pending loopback detection；

Wherein, described loopback answer signal is used for notifying that BBU, this RRU enter loopback detection state；

Wherein, described solution loopback signal is used for notifying that RRU initiates to solve loopback；

Wherein, described in the answer signal that unlinks back for notifying BBU, this RRU enters and solves wrapped state；

As it is shown on figure 3, in BBU or RRU, TX+/-be high speed signal send pin, RD+/-be that high speed signal receives pin, TX+/-and RD+/-pin connection igh-speed wire-rod production line chip, it is used for carrying service signal.TxDIS is to control pin, is used for out Open and close the laser instrument in optical module.Whether LOS is that state indicates pin, connect for the photodetector detected in optical module Receive optical signal.When main website, the input of optical module TxDIS pin is low level, then the laser instrument of main website optical module is opened, and exports light Signal, if the photodetector of remote station optical module receives optical signal, then the LOS pin of remote station optical module exports low electricity Flat.When main website, the input of optical module TxDIS pin is high level, then the laser instrument of main website optical module cuts out, and does not export optical signal, far If the photodetector of end station optical module does not receives optical signal, then the LOS pin output high level of remote station optical module.Cause This, can send the LOS pin of remote station at main website TxDIS pin input low and high level by this low and high level.Can also be Remote station TxDIS pin input low and high level, sends the LOS pin of main website to by this low and high level.Therefore, optical module TxDIS pin and LOS pin may be used for remote station loopback detection function.Alternatively, described loopback detection signal is described BBU Open and close according to the laser instrument within the first control strategy control by described BBU to what the RRU of described pending loopback detection sent The optical signal changed and produce；

The RRU of described pending loopback detection judges to receive described loopback detection signal, including: described pending loopback The RRU of detection judges that internal photodetector receives the rule of optical signal and whether controls laser instrument with BBU and open and close and change First control strategy is consistent, is, judges to receive described loopback detection signal；

Described BBU judges to receive described loopback answer signal, including: the photodetector within described BBU judgement connects Receive the rule of the optical signal RRU whether with described pending loopback detection to control laser instrument and open and close the second control strategy of change Unanimously, it is to judge to receive described loopback answer signal.

The RRU of described pending loopback detection judges to receive described solution loopback signal, including: described pending loopback is examined The RRU surveyed judges that internal photodetector receives the rule of optical signal and whether controls laser instrument with BBU and open and close the changed Three control strategies are consistent, are, judge to receive described solution loopback signal；

Described BBU unlinks back answer signal described in judging to receive, including: the photodetector within described BBU judgement Receive the rule of the optical signal RRU whether with described pending loopback detection to control laser instrument and open and close the 4th control plan of change Slightly consistent, be, judge to receive described in unlink back answer signal.

Technique scheme triggers RRU entrance loopback detection state to enter RRU without additionally arranging Outband network management passage Row loopback detection, and also without increasing hardware circuit in main website and remote station equipment, as long as utilizing the existing light of equipment Two pins (the state instruction LOS pin of photodetector and laser instrument enable and control TxDIS pin) in module, can touch Send out RRU and carry out loopback detection, reduce equipment cost.

In an embodiment, described loopback detection data can be the data of specific setting, it is also possible to for business datum；

In more excellent embodiment, when having service data interaction between described BBU and RRU, now can also be by means of Business datum generates loopback detection signal, and typically, described loopback detection signal is: the laser instrument within BBU is in the first control The business datum sending the RRU to pending loopback detection of the lower output of system strategy, now can more simply utilize system Original hardware structure and the most additionally input data in the case of obtain loopback detection signal.

Accordingly, loopback answer signal is: the laser instrument within the RRU of pending loopback detection is under the second control strategy Export sends the business datum to BBU.Solution loopback signal is: the laser instrument within BBU exports under the 3rd control strategy Send the business datum of the RRU to described pending loopback detection；The answer signal that unlinks back is: described pending loopback detection What the laser instrument within RRU exported under the 4th control strategy sends the business datum to BBU.

Wherein, the first above-mentioned control strategy and the second control strategy can be identical or different, the 3rd control strategy and 4th control strategy can also be identical or different；First control strategy and the 3rd control strategy differ, and second controls Strategy and the 4th control strategy differ.

Exemplary, above-mentioned each control strategy can utilize the control code the most corresponding with this control strategy to determine, such as Corresponding first control strategy of first control code, corresponding second control strategy of the second control code, the 3rd control code the corresponding 3rd controls Strategy, corresponding 4th control strategy of the 4th control code.Each control code utilizes the binary coding setting figure place to constitute, for Code length does not limit, but in order to improve the anti-interference of signal, recognizability takes into account efficiency of transmission, above-mentioned each volume simultaneously Code length generally could be arranged to 5, and such as, the first control code is defined as 01010, and the 3rd control code is defined as 01110, and second Control code is defined as 00100, and the 4th control code is defined as 10001.Wherein, control strategy is: the bit in corresponding control code During for " 1 ", control laser instrument and close；When bit is " 0 ", controls laser instrument and open.

Preferably, for BBU, after sending loopback detection signal/solution loopback signal, if not setting the time period Inside receive that loopback answer signal/unlink back answer signal, then BBU determines that loopback/unlinking refers to show failure, can again to RRU sends loopback detection signal or solves loopback signal, if 3 times all failed, then shows communication abnormality, checks between BBU and RRU Communication link or BBU Yu RRU check that respective received optical power is whether in the range of normal sensibility respectively.In this enforcement In example, carry out loopback response and conciliate the negotiation mechanism of loopback response, its objective is: BBU can confirm that RRU after response being detected Loopback detection state/solution wrapped state, better reliability are successfully entered it.

For above-described embodiment, in order to reduce network service cost, economizing on resources, multiple RRU can share same BBU, namely BBU and RRU can be to drag many relations.Typically, this system structure can be: multiple RRU and BBU of cascade The chain structure connected by optical fiber, it is also possible to for: the hub-and-spoke configuration that multiple RRU and BBU are connected by optical fiber.

Wherein, it is provided with, in main website BBU and each remote station RRU, the optical module that different wave length service signal can be provided, The optical fiber carrying each wavelength service signal is connected respectively to BBU side and RRU side by Fiber Optic Extension device.The optical mode of main website BBU When block is connected by optical fiber one to one with the optical module of remote station RRU, the laser instrument of main website connects the light of remote station by optical fiber Electric explorer, the laser instrument of remote station connects the photodetector of main website by optical fiber.The optical module that main website and remote station use Including SFP (miniaturization pluggable optical transceiver unification module), SFP+ optical module (unify by 10Gbit/s miniaturization pluggable optical transceiver Module) or XFP optical module (10Gbit/s miniaturization pluggable optical transceiver unification module).Wherein, SFP optical module support 100,000,000, Gigabit, 2.5G rate signal, SFP+ optical module and XFP optical module support 10G rate signal.

Thus, in the above-described embodiments, the RRU of pending loopback detection can determine in the following manner: for each RRU presets specific upstream wavelength and specific downstream wavelength, and thus, described BBU needs certain RRU is carried out loopback During detection, send loopback detection signal with specific downstream wavelength corresponding for this RRU, it is possible to receive the ring of this specific downstream wavelength Return the RRU that RRU is pending loopback detection of detection signal.Correspondingly, in above-described embodiment, described pending loopback detection RRU sends loopback answer signal, unlink back answer signal and loopback test data with specific upstream wavelength, and described BBU remembers Record specific upstream wavelength corresponding for each RRU and specific downstream wavelength, and send loopback test number to certain RRU According to, solve loopback signal time all use specific downstream wavelength corresponding for this RRU, and receiving loopback answer signal, solving loopback Opposite end RRU is determined according to its wavelength when answer signal and loopback test data.

So that interactive signal therebetween and data can be transmitted with the fewest optical fiber between BBU and RRU, The specific downstream wavelength of different RRU is different, and specified upstream wavelength is the most different, such that it is able to utilize wavelength-division multiplex technique so that BBU and multiple RRU share a twin-core fiber (including uplink optical fibers core and downlink optical fiber core) or two single-core fibers are carried out Communication, to save fiber resource.

Embodiment two

As shown in Figure 4, the present embodiment provides a kind of optical access network system, it is characterised in that include baseband processing unit BBU and at least one radio frequency remote unit RRU；

The RRU of described pending loopback detection from controller, is connected with internal optical module, for according to the second control The laser instrument that strategy makes this optical module be comprised opens and closes change and produces described loopback answer signal；

Alternatively, as it is shown in figure 5, the number of the RRU comprised in described system is multiple；Described system also includes: with institute State the main website optical fiber expanding unit that BBU connects, and, with multiple remote station sidelights of the cascade that each RRU is connected respectively Fine expanding unit；Described main website optical fiber expanding unit is connected as Chain Network with multiple remote station optical fiber expanding units of cascade Network；Described BBU is led to each RRU by described main website optical fiber expanding unit and described remote station optical fiber expanding unit Believe, and communication mode is optical communication mode；

Alternatively, as shown in Figure 6, the number of the RRU comprised in described system is multiple；Described system also includes: with institute State the main website optical fiber expanding unit that BBU connects, and, a remote station optical fiber expanding unit being connected star-like with each RRU； Described main website optical fiber expanding unit is connected with described remote station optical fiber expanding unit；Described BBU passes through described main website sidelight Fine expanding unit and described remote station optical fiber expanding unit communicate with each RRU, and communication mode is optical communication mode；

Embodiment three

As shown in Fig. 7 (a), the present embodiment provides a kind of loop detection method, is applied to baseband processing unit BBU, including Following steps:

Step S700, sends the loopback detection signal generated according to the first control strategy to the RRU of pending loopback detection；

Step S701, it is determined that after receiving the loopback answer signal of RRU transmission of described pending loopback detection, to described The RRU of pending loopback detection sends loopback test data；Wherein, described loopback answer signal is that described RRU is according to the second control The signal of strategy generating processed；

Step S702, it is judged that the described loopback test data received are the most normal.

Alternatively, as shown in Fig. 7 (b), described method can also include:

Step S703, sends the letter in reply that unlinks generated according to the 3rd control strategy to the RRU of described pending loopback detection Number；

Step S704, it is determined that after receiving the answer signal that unlinks back of RRU transmission of described pending loopback detection, stop Loopback test data are sent to the RRU of described pending loopback detection；Wherein, the answer signal that unlinks back described in is described pending The signal that the RRU of loopback detection generates according to the 4th control strategy.

As shown in Fig. 8 (a), the present embodiment provides a kind of baseband processing unit BBU, including main control module and optical module；

As shown in Fig. 8 (b), described BBU also includes the main igh-speed wire-rod production line chip being connected with described optical module；

Embodiment four

As shown in Fig. 9 (a), the present embodiment provides a kind of loop detection method, is applied to radio frequency remote unit RRU, including Following steps:

Step S900, detects whether to receive the loopback detection signal that baseband processing unit BBU sends；Wherein, described ring Returning detection signal is the signal that described BBU generates according to the first control strategy；

Step S901, after judging to receive described loopback detection signal, sends according to the second control strategy to described BBU The loopback answer signal generated；

Step S902, receives the loopback test data that described BBU sends, is postbacked by described loopback test data ring and deliver to institute State BBU.

Alternatively, as shown in Fig. 9 (b), described method also includes:

Step S903, detects whether to receive the solution loopback signal that baseband processing unit BBU sends；Wherein, unlink described in Letter in reply number is the signal that described BBU generates according to the 3rd control strategy；

Step S904, after judging to receive described solution loopback signal, stops the loopback test data loopback that will receive It is sent to described BBU, sends the answer signal that unlinks back generated according to the 4th control strategy to described BBU.

Judge to receive described loopback detection signal, including:

Judge to receive described solution loopback signal, including:

As shown in Figure 10 (a), the present embodiment provides a kind of radio frequency remote unit RRU, including from control module and optical module；

Alternatively, as shown in Figure 10 (b), described RRU also include be all connected with from control module and optical module from height Speed signal processing chip；

Example 1 (each remote station RRU is not or not same place)

This situation, as a example by 3 remote station RRU and each remote station RRU are as chain-type topological structure, are introduced the technical program and is carried A kind of optical access network system of confession.

Seeing accompanying drawing 11, optical access network system includes: the main website optical fiber expanding unit that main website BBU and optical fiber connect 3 remote station optical fiber expanding units (respectively Fiber Optic Extension dress that (Fiber Optic Extension device A), 3 remote stations and optical fiber connect Put B, C and D).Wherein, each remote station optical fiber expanding unit be chain pass sequentially through after optical fiber links together with main website sidelight Fine expanding unit optical fiber connects.Specifically:

(1) main website BBU, including: igh-speed wire-rod production line chip, controller and 3 optical modules；Wherein, the control of each optical module Tubulation foot TxDIS and state instruction pin LOS is all connected with controller, and the high speed signal transmission pin TX+ of each optical module/- With high speed signal receive pin RD+/-be connected with igh-speed wire-rod production line chip；

(2) remote station, including: igh-speed wire-rod production line chip, controller and 1 optical module；Wherein, controller respectively with light The control pin TxDIS of module, state indicate pin LOS and are connected with igh-speed wire-rod production line chip, the high speed letter of optical module Number send pin TX+/-and high speed signal receive pin RD+/-be connected with igh-speed wire-rod production line chip；

(3) can comprise 6 kinds of different film filtering slices inside main website optical fiber expanding unit A, wavelength is designated as respectivelyThis device A arranges a LINE mouth altogether, 6Mouthful, it is designated as respectively

(4) remote station optical fiber expanding unit B, C, D, is respectively provided with 2 inside each remote station optical fiber expanding unit Planting different film filtering slices and 1 upgrade port EXT, EXT upgrade port supports the upgrade application of other WDM wavelength, such as: device B arranges 1 LINE mouth, 1 EXT mouth, 2Mouthful, it is designated as respectivelyDevice C arranges 1 LINE mouth, 1 EXT mouth, 2Mouthful, it is designated as respectivelyDevice D arranges 1 LINE mouth, 1 EXT mouth, 2Mouthful, it is designated as respectivelyAt BBU and RRU side mixes the glory optical module of correspondence respectively, can realize hanging under 1 BBU the communication link protection topology of 3 far-end RRU.Different The wavelength that RRU uses is separate, and its advantage is: a remote station breaks down, it can be ensured that other remote stations are not by shadow Ring；Save fiber resource.

Communication between RRU and BBU, specifically includes:

(1) BBU to RRU send data signal flow to: 3 optical modules of BBU under the control of the controller, respectively by height The corresponding business signal of telecommunication that speed signal processing chip passes over carries out opto-electronic conversion, obtains 3 wavelength and is respectivelyOptical signal, through Fiber Optic Extension device A, the optical multiplexed signal of these three wavelength is used in 1 optical fiber from LINE Mouth (circuit mouth) is transmitted, will after arriving Fiber Optic Extension device BThe optical signal of wavelength solves, and the optical module giving RRU1 connects Receive, will by upgrading EXT port (cascade port) of Fiber Optic Extension device BThe optical signal of wavelength proceeds transmission, send After LINE mouth to Fiber Optic Extension device C, Fiber Optic Extension device C willThe optical signal of wavelength solves, and gives the optical module of RRU2 Receive, will by upgrade port EXT of Fiber Optic Extension device CThe optical signal of wavelength proceeds transmission, gives Fiber Optic Extension Will after device DThe optical signal of wavelength solves, and the optical module giving RRU3 receives.

(2) signal that RRU sends data to BBU flows to: the optical module of RRU1, is passed over by igh-speed wire-rod production line chip The signal of telecommunication carry out opto-electronic conversion, obtaining wavelength isOptical signal, and by wavelengthOptical signal issue Fiber Optic Extension device B After, then give the LINE mouth of Fiber Optic Extension device A, and then arrive BBU.Igh-speed wire-rod production line chip is first passed by the optical module of RRU2 The signal of telecommunication passed carries out opto-electronic conversion, obtains wavelength and isOptical signal, willOptical signal issue Fiber Optic Extension device C After, then the EXT mouth through Fiber Optic Extension device B, the most again through the LINE mouth of Fiber Optic Extension device A, and then arrive BBU. The optical module of RRU3, the signal of telecommunication passed over by igh-speed wire-rod production line chip carries out opto-electronic conversion, obtains wavelength and isLight Signal, willAfter optical signal issues Fiber Optic Extension device D, then the EXT mouth through Fiber Optic Extension device C and B, the most again through light The LINE mouth of fine expanding unit A, carries out and arrives BBU.Complete communicating of each RRU with BBU.

For sending someone scene or realized the shortcoming of remote station (RRU) signal loopback, this technology by network management path at present Conceptual design is a kind of controls pin and state instruction pin transmission information by optical module, it is achieved the side of remote station signal loopback Method.On the premise of not increasing device hardware cost, solve the remote station hoop during network opening and Breakdown Maintenance The problem of returning.

The remote loopback detection scheme that based on this optical access network system realized is described in detail below, including:

(1) for remote station RRU

As shown in Figure 12, optical module TX+/-and RD+/-pin have continuous high speed signal time, controller continuous detecting Optical module LOS pin signal, it is judged that the level hop mode of LOS pin is the loopback hop mode meeting agreement:

If meeting the loopback hop mode of agreement, then controller controls igh-speed wire-rod production line chip execution loops back also The level controlling optical module TXDIS pin carries out saltus step according to default loopback response hop mode, makes the laser instrument of optical module Being turned on and off, optical module, when laser instrument is opened, sends, to main website, the business letter that high speed processing chip passes over Number；

If not meeting the loopback hop mode of agreement, then controller judges whether the level hop mode of LOS pin accords with What contract was fixed unlink back hop mode:

If the level hop mode of LOS pin meets the hop mode that unlinks back of agreement, then controller controls letter at a high speed Number processing chip performs to release loops back and control the level of optical module TXDIS pin signal to answer according to default response of unlinking (it can be identical that loopback response hop mode conciliates the code stream of loopback response hop mode to hop mode, it is also possible to be different ) carry out saltus step, make the laser instrument of optical module be turned on and off, optical module, when laser instrument is opened, sends to main website The service signal that high speed processing chip passes over；

If the level hop mode of LOS pin does not meets the hop mode that unlinks back of agreement, continue continuous detecting optical mode The level transitional states of block LOS pin.

Wherein, the signal that RRU1 sends service signal to main website flows to, and retouches communication between RRU and BBU with reference to above-mentioned (2) part stated.It should be noted that in the technical program, carry out loopback response and conciliate the negotiation mechanism of loopback response, its mesh : main website can confirm that remote station successful execution loops back after response being detected or solves loops back, and reliability is more Good.

(2) for main website BBU

As shown in Figure 13, optical module TX+/-and RD+/-pin have continuous high speed signal time, controller control optical mode The level of block TXDIS pin carries out saltus step according to default loopback hop mode or the hop mode that unlinks back, makes optical module Laser instrument is turned on and off, and optical module, when laser instrument is opened, sends high speed processing chip to remote station and passes over Service signal；Controller continuous detecting optical module LOS pin signal, it is judged that whether the level hop mode of LOS pin meets Loopback response hop mode or the solution of agreement return response hop mode；If LOS signal meets the loopback response saltus step of agreement Mode or solution return response hop mode, loopback or releasing loopback success；If the level hop mode of LOS pin does not meets The loopback response hop mode of agreement or solution return response hop mode, loopback or releasing loopback failure, then the control of main website Device processed can be again through controlling TXDIS pin, to remote station transmission loopback or unlink and refer to show, if 3 times all failed, then shows Communication abnormality, needs check optical fiber link or check that whether the received optical power of our station and remote station optical module is at normal sensitive In the range of degree.Wherein, the signal that main website sends service signal to RRU flows to, with reference to above-mentioned to communication description between RRU and BBU (1) part.

One main website can have multiple optical module to be connected one to one with multiple remote station optical modules by Fiber Optic Extension device. Remote station igh-speed wire-rod production line chip needs to support loop fuction.

(3) controller controls igh-speed wire-rod production line chip execution loopback/solution loops back

Controller controls igh-speed wire-rod production line chip and performs loopback/solution loops back, specifically includes:

Controller sends loopback to igh-speed wire-rod production line chip and enables control signaling/solution loopback enable control signaling；

Igh-speed wire-rod production line chip receives loopback enable control signaling/solution loopback and enables after controlling signaling, and entrance loopback/ Solve loopback mode.Specifically, the operation under loopback mode of the igh-speed wire-rod production line chip, as shown in Figure 14, including:

By RD+/-serial traffic signal of coming in through CDR (Clock Data Recovery, clock and data recovery) mould Block passes through, after carrying out clock and data recovery, the service signal that Deser module (solution serial module) becomes parallel, then data is filled Enter in FIFO (First In First Out, first in first out) queue, again the data in FIFO are sent out with the clock recovered Give Ser module (serial module), by TX+/-service signal serial is sent, i.e. RD+/-signal pass igh-speed wire-rod production line Chip internal be looped back to again TX+/-out,

If using one with the igh-speed wire-rod production line chip returning function, it is only necessary to chip register write by controller Mode enables loop fuction, and acquiescence loop fuction is prohibited from.

Optical module TX+/-need to connect igh-speed wire-rod production line chip with RD+/-pin, to produce and detection continuous high speed letter Number stream (namely service signal stream).High speed signal code stream includes but not limited to 100M/1000M/10G/40G/100G Ethernet Signal, STM-1/4/16/64SDH signal, OTU1/2/3/4OTN signal, FC-100/200/400/800/1200/1600Fiber Channel signal, Option 1/2/3/4/5/6CPRI signal.

Loopback/unlink back hop mode and loopback code set corresponding to loopback/response mode of unlinking back, release loopback and compile Code character, encoding the response group are made up of 3 groups of binary codings respectively.Such as: 1 represents high level, 0 represents low level, and loopback encodes Group is defined as 01010 (namely loopback hop mode is low-> height-> low-> height-> low level), releases loopback code set and is defined as 01110, encoding the response group 00100.

In sending side, code set is produced by controller, is used for controlling optical module TXDIS pin.Receiving side, controller is even Continuous detection optical module LOS pin level.Such as, it is 01010 when main station controller controls optical module TXDIS pin level, corresponding The level that remote station controller detects at optical module LOS pin is similarly 01010.

Owing to the response time of TXDIS pin signal is no less than 1 millisecond, the response time of LOS pin signal is no less than 100 Microsecond, therefore in code set, the level duration of every bit signal needs more than 1 millisecond.

Example 2 (each remote station RRU is in same place)

This situation still, as a example by 3 remote station RRU and each remote station RRU are as chain-type topological structure, introduces the technical program The another kind of optical access network system provided.

As shown in Figure 15, this system includes: (optical fiber expands the main website optical fiber expanding unit that main website BBU and optical fiber connect Extending apparatus A), 3 remote station RRU and 1 the remote station optical fiber expanding unit (Fiber Optic Extension being connected with 3 remote station optical fiber Device B).Wherein, remote station optical fiber expanding unit is connected with main website optical fiber expanding unit optical fiber.Specifically:

(3) all can comprise 6 kinds of different film filtering slices inside Fiber Optic Extension device A with B, wavelength is designated as respectivelyThis device A arranges a LINE mouth altogether, 6Mouthful, it is designated as respectivelyMix the glory optical module of correspondence in BBU and RRU side respectively, can realize hanging under 1 BBU 3 far-end RRU point-to-point communications (3 RRU are at same position).Different RRU sending and receiving use individual wavelengths, and advantage is: same Transmitting in a piece optical fiber and be independent of each other, a website breaks down, it can be ensured that other websites are unaffected, saves fiber resource.

Communication between RRU and BBU, specifically includes:

(1) BBU to RRU send data signal flow to: 3 optical modules of BBU under the control of the controller, respectively by height The corresponding business signal of telecommunication that speed signal processing chip passes over carries out opto-electronic conversion, obtains 3 wavelength and is respectivelyOptical signal, through Fiber Optic Extension device A the optical multiplexed signal of these three wavelength used in 1 optical fiber and passes Defeated, arrive RRU side, the optical signal solving these three wavelength after Fiber Optic Extension device B connects respectively to RRU1, RRU2, RRU3 Optical module receives.

(2) RRU to BBU send data signal flow to: 3 optical modules of RRU under the control of the controller, respectively by height The corresponding business signal of telecommunication that speed signal processing chip passes over carries out opto-electronic conversion, obtains 3 wavelength and is respectivelyOptical signal, through Fiber Optic Extension device B the optical multiplexed signal of these three wavelength used in 1 optical fiber and carries out Transmission, arrives BBU side, and the optical signal solving these three wavelength after Fiber Optic Extension device A connects to enter to the optical module of BBU respectively Row receives.Complete the communication between each RRU and same BBU.

The loopback detection scheme realized based on this optical access network system, with each remote station RRU not when same place The remote loopback detection scheme that realized of optical access network system, the principle of the two detection scheme is identical.

In the technical program, Fiber Optic Extension device can according to the kind difference flexible Application of internal filter plate, due to Inside belongs to pure optics, for 2G 3G 4G BTS service all can transparent transmission, it is not necessary to power supply, and safeguard use letter Single.

This Fiber Optic Extension device is not limited to above-mentioned several, uses this kind of passive insert box encapsulation, can use SC/UPC or LC/UPC interface, can load the film filtering slice of different wave length inside it, it is possible to achieve higher transmission capacity. The type derived broadly falls into this base station and zooms out Fiber Optic Extension unit protection category.

The intelligent loopback detection scheme that above-described embodiment provides, BBU sends according to first to the RRU of pending loopback detection The loopback detection signal that control strategy generates, after the RRU of described pending loopback detection receives described loopback detection signal, to Described BBU sends the loopback answer signal generated according to the second control strategy, and described BBU receives described loopback answer signal After, sending loopback test data to the RRU of described pending loopback detection, the RRU of described pending loopback detection is to described BBU Loopback test data described in loopback, described BBU judges that the described loopback test data received are the most normal, thus completes far-end Stand the loopback detection of RRU.This technical scheme enters loopback detection state without artificial to remote station manual operation RRU, it is possible to Remote station loopback detection is carried out easily during network opening and Breakdown Maintenance.

One of ordinary skill in the art will appreciate that all or part of step in said method can be instructed by program Related hardware completes, and described program can be stored in computer-readable recording medium, such as read only memory, disk or CD Deng.Alternatively, all or part of step of above-described embodiment can also use one or more integrated circuit to realize, accordingly Ground, each module/unit in above-described embodiment can realize to use the form of hardware, it would however also be possible to employ the shape of software function module Formula realizes.The present invention is not restricted to the combination of the hardware and software of any particular form.

It should be noted that the present invention also can have other various embodiments, spiritual and essence without departing substantially from the present invention In the case of, those of ordinary skill in the art can make various corresponding change and deformation according to the present invention, but these are corresponding Change and deform the protection domain that all should belong to appended claims of the invention.

Claims

1. a loop detection method, is applied to include baseband processing unit BBU and at least one radio frequency remote unit RRU Optical access network system, it is characterised in that comprise the following steps:

After the RRU of described pending loopback detection receives described loopback detection signal, send to described BBU and control according to second The loopback answer signal of strategy generating；

After described BBU receives described loopback answer signal, send loopback test number to the RRU of described pending loopback detection According to；

2. the method for claim 1, it is characterised in that described method also includes:

After the RRU of described pending loopback detection judges to receive described solution loopback signal, stop the loopback test that will receive Data ring is sent back to described BBU, sends the answer signal that unlinks back generated according to the 4th control strategy to described BBU；

Described BBU unlinks back after answer signal described in judging to receive, and determines that the RRU entrance of described pending loopback detection is unlinked The state of returning, stops sending loopback test data to the RRU of described pending loopback detection.

3. the method for claim 1, it is characterised in that:

Described loopback detection signal be described BBU to the RRU of described pending loopback detection send by described BBU according to first The optical signal that laser instrument within control strategy control opens and closes change and produces；

Described loopback answer signal be described pending loopback detection RRU to described BBU send by described RRU according to second The optical signal that laser instrument within control strategy control opens and closes change and produces；

The RRU of described pending loopback detection judges that internal photodetector receives the rule of optical signal and whether controls with BBU The first control strategy that laser instrument processed opens and closes change is consistent, is, judges to receive described loopback detection signal；

Described BBU judges to receive described loopback answer signal, including:

Described BBU judge internal photodetector receive the rule of optical signal whether with described pending loopback detection RRU controls laser instrument and opens and closes the second control strategy of change unanimously, is, judges to receive described loopback answer signal.

4. method as claimed in claim 2, it is characterised in that:

Described solution loopback signal be described BBU to the RRU of described pending loopback detection send by described BBU according to the 3rd control The optical signal that laser instrument within policy control processed opens and closes change and produces；

The described answer signal that unlinks back be described pending loopback detection RRU to described BBU send by described RRU according to The optical signal that laser instrument within four control strategies controls opens and closes change and produces；

The RRU of described pending loopback detection judges that internal photodetector receives the rule of optical signal and whether controls with BBU The 3rd control strategy that laser instrument processed opens and closes change is consistent, is, judges to receive described solution loopback signal；

Described BBU judge internal photodetector receive the rule of optical signal whether with described pending loopback detection RRU controls laser instrument, and to open and close the 4th control strategy of change consistent, is, judge to receive described in unlink back answer signal.

5. method as claimed in claim 3, it is characterised in that:

In the case of persistently having service data interaction between the RRU of described BBU and described pending loopback detection, described loopback Detection signal is that the laser instrument within described BBU exports effective transmission to described pending ring under described first control strategy Return the business datum signal of the RRU of detection；

Described loopback answer signal is that the laser instrument within RRU of described pending loopback detection is under described second control strategy Output is effective sends the business datum signal to described BBU.

6. method as claimed in claim 4, it is characterised in that:

Described optical access network system is the chain network system that multiple RRU with BBU cascaded are connected by optical fiber, or multiple The Star Network system that RRU with BBU is connected by optical fiber.

Method the most according to claim 6, described method also includes:

Described BBU presets specific downstream wavelength and specified upstream wavelength for each RRU in described optical access network system；

Wherein, the determination mode of the RRU of pending loopback detection is: described BBU needs in described optical access network system When any one RRU carries out loopback detection, send loopback detection signal with the specific downstream wavelength of this RRU, it is possible to receive this specific The RRU that RRU is pending loopback detection of the loopback detection signal of downstream wavelength；

The RRU of pending loopback detection sends loopback answer signal and loopback test number with specified upstream wavelength to described BBU According to；Described BBU determines pending loopback detection according to the upstream wavelength of the loopback answer signal received and loopback test data RRU, with determined by RRU specific downstream wavelength send loopback test data.

8. an optical access network system, it is characterised in that include baseband processing unit BBU and at least one Remote Radio Unit RRU；

Described BBU, sends, for the RRU of pending loopback detection in described system, the loopback generated according to the first control strategy Detection signal；Synchronous regime at described BBU judges that termination receives the loopback response that the RRU of described pending loopback detection sends After signal, send loopback test data to the RRU of described pending loopback detection；Judge the RRU of described pending loopback detection The loopback test data of loopback are the most normal；

The RRU of described pending loopback detection, the synchronous regime for the RRU in described pending loopback detection judges that end receives After described loopback detection signal, send the loopback answer signal generated according to the second control strategy to described BBU；Receiving After the loopback test data that described BBU sends, to loopback test data described in described BBU loopback.

System the most according to claim 8, it is characterised in that the BBU in described system includes the light being provided with laser instrument Module and master controller；Each RRU all includes being provided with the optical module of laser instrument and from controller；

The master controller of described BBU, is connected with internal optical module, for making this optical module be wrapped according to the first control strategy The laser instrument contained opens and closes change and produces described loopback detection signal；

The RRU of described pending loopback detection from controller, is connected with internal optical module, is used for according to the second control strategy The laser instrument that this optical module is comprised opens and closes change and produces described loopback answer signal.

System the most according to claim 9, it is characterised in that the RRU's of described BBU and described pending loopback detection Synchronous regime judges that end is the state instruction LOS pin of the photodetector that internal optical module is comprised；

The master controller of described BBU, for according to the first control strategy, the laser instrument of the optical module within control enables and controls The level change of TxDIS pin end so that laser instrument opens and closes change and produces described loopback detection signal；Optical mode within Jian Ce Whether the level change of the LOS pin of the photodetector that block is comprised meets the second control strategy, if it is, judge to receive The loopback answer signal sent to the RRU of described pending loopback detection；

The RRU of described pending loopback detection from controller, for monitoring the photodetector that the optical module of inside is comprised LOS pin level change whether meet the first control strategy, if it is, judge receive described BBU send loopback Detection signal；According to the second control strategy, the laser instrument of the optical module within control enables the level change controlling TxDIS pin end Change and produce described loopback answer signal.

11. systems according to claim 10, it is characterised in that each control strategy is determined by unique corresponding control code； Each control code utilizes the binary coding setting figure place to constitute, and each control strategy is: the bit in corresponding control code is " 0 " Time " 1 ", controlling TxDIS pin respectively is different level states so that laser instrument that this TxDIS pin is connected open and Close；In each control code, the persistent period of each bit is all higher than response time and the sound of LOS pin of TxDIS pin signal Between Ying Shi.

12. systems according to claim 9, it is characterised in that the BBU in described system also includes and internal optical module The main igh-speed wire-rod production line chip connected；Each RRU the most also include respectively with internal optical module and from control unit be connected from Igh-speed wire-rod production line chip；

The laser instrument that described loopback detection signal optical module within described BBU is comprised is defeated under described first control strategy Go out the business datum letter sending the RRU to described pending loopback detection effectively received from described main high speed processing chip Number；

The laser instrument that described loopback answer signal optical module within the RRU of described pending loopback detection is comprised is described Under second control strategy, output effectively sends the business datum letter to described BBU from described from what high speed processing chip received Number.

13. systems according to claim 12, the optical module within described BBU, for described pending loopback detection RRU send loopback detection data, these loopback test data be connected with this optical module main igh-speed wire-rod production line chip output Business datum；

The optical module within RRU of described pending loopback detection, for receiving the loopback test data that described BBU sends, and Through described from igh-speed wire-rod production line chip loopback after, to described BBU send loopback loopback test data.

14. systems according to claim 8, it is characterised in that described BBU is additionally operable to described pending loopback detection RRU sends the solution loopback signal generated according to the 3rd control strategy；Synchronous regime at described BBU judges that termination is treated described in receiving After carrying out the answer signal that unlinks back of RRU transmission of loopback detection, stop sending loopback to the RRU of described pending loopback detection Test data；

The RRU of described pending loopback detection, is additionally operable to the synchronous regime at the RRU of described pending loopback detection and judges termination After receiving described solution loopback signal, stop the loopback test data ring received is sent back to described BBU, and to described BBU Send the answer signal that unlinks back generated according to the 4th control strategy.

15. systems according to claim 14, it is characterised in that the number of the RRU comprised in described system is multiple；Institute System of stating also includes: the main website optical fiber expanding unit being connected with described BBU, and, the cascade being connected respectively with each RRU Multiple remote station optical fiber expanding units；Described main website optical fiber expanding unit extends with multiple remote station optical fiber of cascade Device is connected as chain network；Described BBU extends dress by described main website optical fiber expanding unit and described remote station optical fiber Put and communicate with each RRU, and communication mode is optical communication mode；

The main website optical fiber expanding unit that described BBU connects, for transmitting/receiving optical signal realization deciliter to mutual with described BBU Ripple；

With multiple remote station optical fiber expanding units of the cascade that each RRU is connected respectively, it is used for mutual with each RRU Transmit/receive optical signal and realize deciliter ripple；

Described main website optical fiber expanding unit is additionally operable to pass through fiber-optic transfer with multiple remote station optical fiber expanding units of cascade Smear signal is to the other side.

16. systems according to claim 14, it is characterised in that the number of the RRU comprised in described system is multiple；Institute System of stating also includes: the main website optical fiber expanding unit being connected with described BBU, and, a far-end being connected star-like with each RRU Optical fiber of standing expanding unit；Described main website optical fiber expanding unit is connected with described remote station optical fiber expanding unit；Described BBU Communicated with each RRU by described main website optical fiber expanding unit and described remote station optical fiber expanding unit, and communication party Formula is optical communication mode；

The remote station optical fiber expanding unit being all connected with each RRU, for transmitting/receiving optical signal in fact to mutual with each RRU Existing deciliter ripple；

Described main website optical fiber expanding unit and remote station optical fiber expanding unit be additionally operable to by fiber-optic transfer smear signal to The other side.

17. according to the system described in claim 15 or 16, it is characterised in that each RRU transmits/receives the light letter of mutually different wavelength Number；Described BBU transmits/receives the optical signal transmitted/received with each RRU and has the optical signal of phase co-wavelength.

18. 1 kinds of loop detection methods, are applied to baseband processing unit BBU, comprise the following steps:

After judgement receives the loopback answer signal of RRU transmission of described pending loopback detection, examine to described pending loopback The RRU surveyed sends loopback test data；Wherein, described loopback answer signal is that described RRU generates according to the second control strategy Signal；

Judge that the described loopback test data received are the most normal.

19. methods as claimed in claim 18, it is characterised in that described method can also include:

After judgement receives the answer signal that unlinks back of RRU transmission of described pending loopback detection, stop to described pending The RRU of loopback detection sends loopback test data；Wherein, the answer signal that unlinks back described in is described pending loopback detection The signal that RRU generates according to the 4th control strategy.

20. methods as claimed in claim 18, it is characterised in that:

Described BBU judge internal photodetector receive the rule of optical signal whether with described pending loopback detection RRU controls laser instrument and opens and closes the second control strategy rule of change unanimously, is to judge to receive described loopback answer signal.

21. methods as claimed in claim 19, it is characterised in that:

22. methods as claimed in claim 20, it is characterised in that:

23. 1 kinds of baseband processing unit BBU, including main control module and optical module；

Described main control module, sends according to the first control plan to the RRU of described pending loopback detection for controlling optical module The loopback detection signal slightly generated；Synchronous regime judgement termination at described BBU receives the RRU of described pending loopback detection and sends out After the loopback answer signal sent, control optical module and send loopback test data to the RRU of described pending loopback detection；Judge institute The loopback test data of the RRU loopback stating pending loopback detection are the most normal；Wherein, described loopback answer signal be described in treat Carry out the signal that the RRU of loopback detection generates according to the second control strategy；

Described optical module, under RRU from the control of described main control module to described pending loopback detection send according to The loopback detection signal that first control strategy generates, receives the loopback test data of the RRU loopback of described pending loopback detection.

24. BBU as claimed in claim 23, it is characterised in that:

Described main control module, is additionally operable to control optical module and sends according to the 3rd control to the RRU of described pending loopback detection The solution loopback signal of strategy generating；Synchronous regime judgement termination at described BBU receives the RRU of described pending loopback detection and sends out After the answer signal that unlinks back sent, control described optical module and stop sending loopback test to the RRU of described pending loopback detection Data；Wherein, the answer signal that unlinks back described in is the letter that the RRU of described pending loopback detection generates according to the 4th control strategy Number；

Described optical module, be additionally operable under RRU from the control of described main control module to described pending loopback detection send by The solution loopback signal generated according to the 3rd control strategy.

25. BBU as claimed in claim 24, it is characterised in that:

Described main control module, the laser instrument for making optical module be comprised according to the first control strategy opens and closes change and produces Described loopback detection signal；Laser instrument optical module being comprised according to the 3rd control strategy opens and closes change and produces described solution Loopback signal；

The synchronous regime of described BBU judges the state instruction LOS pin of the photodetector that end comprised by described optical module.

26. BBU as claimed in claim 25, it is characterised in that:

Described main control module, for according to the first control strategy, the laser instrument controlling described optical module enables control TxDIS pipe The level change of foot so that laser instrument opens and closes change and produces described loopback detection signal；Monitor described optical module to be comprised The level change of LOS pin of photodetector whether meet the second control strategy, if it is, judge to receive described The loopback answer signal that RRU sends.

27. BBU as claimed in claim 25, it is characterised in that:

Described main control module, for according to the 3rd control strategy, the laser instrument controlling described optical module enables control TxDIS pipe The level change of foot so that laser instrument opens and closes change and produces described solution loopback signal；Monitor what described optical module was comprised Whether the level change of the LOS pin of photodetector meets the 4th control strategy, if it is, judge to receive described RRU The answer signal that unlinks back sent.

28. BBU as described in claim 26 or 27, it is characterised in that:

Each control strategy is determined by unique corresponding control code；Each control code utilizes the binary coding setting figure place to constitute, Each control strategy is: when the bit in corresponding control code is for " 0 " and " 1 ", and controlling TxDIS pin respectively is different level shapes State so that the laser instrument that this TxDIS pin is connected opens and closes；In each control code, the persistent period of each bit is the biggest Response time and the response time of LOS pin in TxDIS pin signal.

29. BBU as claimed in claim 25, it is characterised in that:

Described BBU also includes the main igh-speed wire-rod production line chip being connected with described optical module；

The laser instrument that described loopback detection signal optical module within described BBU is comprised is defeated under described first control strategy Go out the business datum letter sending the RRU to described pending loopback detection effectively received from described main high speed processing chip Number.

30. BBU as claimed in claim 29, it is characterised in that:

Described optical module, for sending loopback test data to the RRU of described pending loopback detection, these loopback test data are The business datum of described main igh-speed wire-rod production line chip output.

31. 1 kinds of loop detection methods, are applied to radio frequency remote unit RRU, comprise the following steps:

Detect whether to receive the loopback detection signal that baseband processing unit BBU sends；Wherein, described loopback detection signal is institute State the signal that BBU generates according to the first control strategy；

After judging to receive described loopback detection signal, send, to described BBU, the loopback generated according to the second control strategy and answer Answer signal；

32. methods as claimed in claim 31, it is characterised in that described method also includes:

Detect whether to receive the solution loopback signal that baseband processing unit BBU sends；Wherein, described solution loopback signal is described The signal that BBU generates according to the 3rd control strategy；

After judging to receive described solution loopback signal, stop the loopback test data ring received is sent back to described BBU, The answer signal that unlinks back generated according to the 4th control strategy is sent to described BBU.

33. methods as claimed in claim 32, it is characterised in that:

Judge to receive described loopback detection signal, including:

Judge that internal photodetector receives the first the control whether rule of optical signal changes with BBU control laser instrument keying System strategy is consistent, is, judges to receive described loopback detection signal.

34. methods as claimed in claim 32, it is characterised in that:

Judge to receive described solution loopback signal, including:

Judge that internal photodetector receives the 3rd the control whether rule of optical signal changes with BBU control laser instrument keying System strategy is consistent, is, judges to receive described solution loopback signal.

35. methods as claimed in claim 31, it is characterised in that:

In the case of persistently having service data interaction between the RRU of described BBU and described pending loopback detection, described loopback Detection signal is that the transmission that the laser instrument within described BBU exports under described first control strategy is examined to described pending loopback The business datum signal of the RRU surveyed；

Described loopback answer signal is that the laser instrument within RRU of described pending loopback detection is under described second control strategy The business datum signal sending extremely described BBU of output.

36. 1 kinds of radio frequency remote unit RRU, including from control module and optical module；

Described from control module, for judging that termination receives described baseband processing unit BBU and sends in the synchronous regime of described RRU Loopback detection signal after, control optical module to described BBU send according to second control strategy generate loopback answer signal；Its In, described loopback detection signal is the signal that described BBU generates according to the first control strategy；

Described optical module, for generating according to the second control strategy described transmission to described BBU from the control of control module Loopback answer signal, receive described BBU send loopback test data, the described loopback test data ring received is postbacked Deliver to described BBU.

37. RRU as claimed in claim 36, it is characterised in that:

Described main control module, is additionally operable to judge that termination receives the letter in reply that unlinks that described BBU sends in the synchronous regime of described RRU After number, control optical module and send the answer signal that unlinks back generated according to the 4th control strategy to described BBU；Wherein, described solution Loopback signal is the signal that described BBU generates according to the 3rd control strategy；

Described optical module, is additionally operable to send according to fourth control strategy raw to described BBU described from the control of control module The answer signal that unlinks back become.

38. RRU as claimed in claim 37, it is characterised in that:

Described from control module, the laser instrument for making optical module be comprised according to the second control strategy opens and closes change and produces Described loopback answer signal；Laser instrument optical module being comprised according to the 4th control strategy opens and closes change and produces described solution Loopback answer signal；

The synchronous regime of described RRU judges the state instruction LOS pin of the photodetector that end comprised by described optical module.

39. RRU as claimed in claim 38, it is characterised in that:

Described from control module, for according to the second control strategy, the laser instrument controlling described optical module enables control TxDIS pipe The level change of foot so that laser instrument opens and closes change and produces described loopback answer signal；Monitor described optical module to be comprised The level change of LOS pin of photodetector whether meet the first control strategy, if it is, judge to receive described The loopback detection signal that BBU sends.

40. RRU as claimed in claim 38, it is characterised in that:

Described from control module, for according to the 4th control strategy, the laser instrument controlling described optical module enables control TxDIS pipe The level change of foot so that laser instrument opens and closes and changes and the answer signal that unlinks back described in generation；Monitor described optical module to be wrapped Whether the level change of the LOS pin of the photodetector contained meets the 3rd control strategy, if it is, judgement receives described The solution loopback signal that BBU sends.

41. RRU as described in claim 39 or 40, it is characterised in that:

42. RRU as claimed in claim 36, it is characterised in that:

Described RRU also include be all connected with from control module and optical module from igh-speed wire-rod production line chip；

The laser instrument that described loopback answer signal is comprised by described optical module exports effectively under described second control strategy The business datum signal to described BBU is sent from what high speed processing chip received from described.

43. RRU as claimed in claim 42, it is characterised in that:

Described optical module, for receiving the loopback test data that described BBU sends, and through described from igh-speed wire-rod production line chip ring Hui Hou, sends the loopback test data of loopback to described BBU.