CN101651492A - Remote transmission device, remote transmission system and abnormal luminous fault processing method for optical access network - Google Patents
Remote transmission device, remote transmission system and abnormal luminous fault processing method for optical access network Download PDFInfo
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Abstract
The embodiment of the invention provides a remote transmission device, a remote transmission system and an abnormal luminous fault processing method for an optical access network. The remote transmission device mainly comprises an EB (extender board); the EB is arranged among a plurality of optical network devices at a user side and an OLT at a network side; the optical network devices at the userside are detected through uplink optical signals sent by optical access physical ports; and the optical network devices at the user side correspond to the optical access physical ports one by one. The EB judges whether the abnormal luminous phenomenon appears in the optical access physical ports or not according to a detection result so as to determine the information of the optical network device with abnormal luminescence at the user side and cut off an uplink channel of the optical network device with the abnormal luminescence at the user side. The utilization of the device, the system andthe method can accurately position which ONU or ONT is wrong when ONUs or ONTs perform the abnormal luminescence, thereby ensuring that the whole PON network can effectively resist the abnormal luminescence of the ONUs or the ONTs.
Description
Technical field
The present invention relates to field of optical networks, relate in particular to a kind of remote transmission device, system and abnormal luminous fault processing method of Optical Access Network.
Background technology
EPON (PON, Passive Optical Network) technology is a kind of point-to-multipoint (P2MP, point to multi-point) the light access technology of mode, by light path destination node (OLT, Optical Line Termination), optical branching device, optical network unit (ONU, OpticalNetwork Unit)/Optical Network Terminal (ONT, Optical Network Terminal) and connect ONU and the optical fiber of ONT is formed.
OLT is connected with optical branching device by a trunk optical fiber as local side apparatus, and optical branching device is connected with each ONU or ONT by each independent branch optical fiber.At down direction, optical branching device is realized the beam split function, will send to each ONU or ONT from the downlink optical signal of OLT by branch optical fiber; At up direction, optical branching device is realized the light signal aggregation feature, after the uplink optical signal that each ONU or ONT are sent converges, sends to OLT by trunk optical fiber.In order to guarantee that the uplink optical signal that each ONU in the up direction or ONT send does not clash, OLT must find range to each ONU or ONT, the result controls the moment and the duration that each ONU or ONT occupy up optical link according to range finding, require each ONU or ONT must adopt the time division multiple access multiplex mode (TDMA, Time DivisionMultiple Access) of burst to send upstream data simultaneously.
Under normal circumstances, the Time Slot Occupancy data feedback channel that each ONU or ONT all authorize according to OLT sends uplink optical signal, signal conflict can not occur on the data feedback channel of PON.But, when ONU or ONT break down, the time slot of authorizing not according to OLT and when taking data feedback channel at random or forever, when perhaps having malice ONU or ONT arbitrarily to take data feedback channel, and send uplink optical signal, the PON state that will paralyse.Existing a kind of mode is to carry out fault detect and investigation in OLT, and owing to the uplink optical signal of above-mentioned optical branching device with each ONU or ONT transmission converges, therefore, can't orient exactly is that problem has appearred in which ONU or ONT.
Summary of the invention
The embodiment of the invention provides a kind of remote transmission device, system and abnormal luminous fault processing method of Optical Access Network, occurs when abnormal luminous thereby can solve at ONU or ONT, causes the problem that PON can't operate as normal.
The embodiment of the invention is achieved through the following technical solutions:
A kind of extender equipment EB of Optical Access Network, this extender equipment is an active equipment, comprise optical amplification device and/or photoelectricity light conversion device, described EB provides a plurality of light to insert physical port, each light inserts physical port and links to each other by the optical network device of optical fiber with a user side, after described EB will be coupled from the uplink optical signal that a plurality of light access physical ports receive, send to the optical line terminal OLT of network side, and after the downlink optical signal that OLT sends over decomposed, send to the optical network device of each user side respectively by each optical fiber, described EB also comprises:
Abnormal luminous phenomenon detection module, be used for the optical network device of user side is detected to the uplink optical signal that described EB sends by light access physical port, judge according to testing result described light inserts in the physical port abnormal luminous phenomenon whether occurs, the light that abnormal luminous phenomenon occurs is inserted physical port information send to abnormal luminous Port Management module, send and cut off the order that the light that abnormal luminous phenomenon occurs inserts the data feedback channel of physical port;
Abnormal luminous Port Management module, the light that is used to manage the abnormal luminous phenomenon of appearance that abnormal luminous phenomenon detection module passes over inserts physical port information, reports the light that abnormal luminous phenomenon occurs to insert the optical network device information that physical port and/or light insert the user side of physical port correspondence to described OLT.
A kind of optical communication system, comprise optical line terminal OLT that is arranged at network side and a plurality of optical network devices that are arranged at user side, the optical network device of OLT and user side is connected by the Optical Distribution Network of point to multiple spot, and described point comprises to the Optical Distribution Network of multiple spot: as each described extender equipment EB of claim 1 to 5.
A kind of processing method of abnormal luminous fault of Optical Access Network, described Optical Access Network comprise extender equipment EB, and described EB is arranged between the optical line terminal OLT of a plurality of optical network devices of user side and network side, and described method comprises:
Described EB detects by the uplink optical signal that light access physical port sends over the optical network device of user side, and the optical network device of user side is corresponding one by one with described light access physical port;
Described EB judges according to testing result described light inserts in the physical port abnormal luminous phenomenon whether occurs;
Described EB inserts physical port according to the light that has abnormal luminous phenomenon, determines the optical network device information of abnormal luminous user side, and cuts off the data feedback channel of the optical network device of this abnormal luminous user side.
As seen from the above technical solution provided by the invention, the embodiment of the invention provides a plurality of light to insert physical port by making EB, each light inserts physical port and links to each other by the optical network device of optical fiber with a user side, can make whole PON network resist optical network device abnormal luminous of user side effectively.
Description of drawings
Fig. 1 is the network architecture schematic diagram of a kind of LR-PON of the embodiment of the invention one proposition;
Fig. 2 is the configuration diagram of the distance transmission system of the PON that proposes of the embodiment of the invention one;
The structural representation of a kind of EB based on OA that Fig. 3 a provides for the embodiment of the invention two;
The structural representation of a kind of EB based on OA that Fig. 3 b provides for the embodiment of the invention two;
The structural representation of a kind of EB based on OA that Fig. 3 c provides for the embodiment of the invention two;
The structural representation of a kind of EB based on OA that Fig. 3 d provides for the embodiment of the invention two;
Fig. 4 a for the embodiment of the invention three provide a kind of based on photoelectricity light (OEO, the structural representation of EB Optical-Electrical-Optical);
The structural representation of a kind of EB based on OEO that Fig. 4 b provides for the embodiment of the invention three;
A kind of structural representation that Fig. 5 provides for the embodiment of the invention three based on OEO and the EB that combines with ethernet technology;
The structural representation of a kind of EB that mixes with OEO based on OA that Fig. 6 provides for the embodiment of the invention three.
Embodiment
In embodiments of the present invention, point between a plurality of optical network devices of the OLT of network side and user side is provided with extender equipment (EB in the Optical Distribution Network of multiple spot, Extender Box), this EB is an active equipment, comprise optical amplification device and/or photoelectricity light conversion device, provide a plurality of light to insert physical port, each light inserts physical port and links to each other by the optical network device of optical fiber with a user side, after will being coupled from the uplink optical signal that a plurality of light access physical ports receive, send to OLT, after the downlink optical signal that OLT is sended over decomposes, send to the optical network device of each user side respectively by each optical fiber.
Further, EB detects by the uplink optical signal that light inserts the physical port transmission the optical network device of user side, judge according to testing result described light inserts in the physical port abnormal luminous phenomenon whether occurs, the optical network device that the light that abnormal luminous phenomenon occurs is inserted the user side of physical port information and/or light access physical port correspondence sends to OLT, and cuts off the data feedback channel that the light that abnormal luminous phenomenon occurs inserts physical port;
Further, the light of the abnormal luminous phenomenon of appearance that OLT reception EB reports inserts the optical network device information of the user side of physical port and/or light access physical port correspondence, determine the optical network device of abnormal luminous user side, and the optical network device of ordering this abnormal luminous user side stops to send uplink optical signal, and still opens the down going channel of the optical network device of this abnormal luminous user side.
Further, EB also provides the PON port of an appointment to link to each other with optical branching device, and this optical branching device links to each other with the optical network device of a plurality of user sides again.
The optical network device of above-mentioned user side comprises: ONU or ONT.
For ease of understanding, be that example is further explained explanation below in conjunction with accompanying drawing with several specific embodiments, and each embodiment does not constitute the qualification to the embodiment of the invention to the embodiment of the invention.
Embodiment one
A kind of long-distance passive optical network (LR-PON, Long Reach PON) the network architecture as shown in Figure 1, in this network architecture, on optical transmission pathway, increase EB, be integrated with power amplifier (OA among the EB, Optical Amplifier) or the photoelectricity photoconverter (OEO, Optical-Electrical-Optical).Topological structure between EP and ONU is P2MP, so the topological structure between OLT and ONU is still P2MP.
In order to support the long-range data transmission of OLT and ONU, need the light signal in the optical fiber be amplified, the framework of the distance transmission system of the PON that this embodiment proposes is as shown in Figure 2.This framework comprises: ONU/ONT, optical branching device, EB and OLT.
Above-mentioned EB is an active equipment, provide a plurality of light to insert physical port, (as the port one of Fig. 2 to m) is as the PON port of the backhaul of base station, each light access physical port that these a plurality of light insert in the physical port links to each other with an ONU by a branch optical fiber respectively, light inserts physical port and ONU has relation one to one, it is the topological structure that adopts point-to-point (P2P, Peer to Peer) to connect between EB and the ONU that uses as the backhaul of base station.When adopting PON to do the backhaul of base station, PON uses as a kind of transmission technology, rather than a kind of simple access technology, this moment is high a lot of as simple access technology to the security requirement comparison PON of PON, operator's special requirement are when the abnormal luminous phenomenon of above-mentioned ONU or ONT occurring, and PON and base station still can operate as normal.
The PON port that above-mentioned EB also provides a port (as the port h of Fig. 2) to insert as the domestic consumer, this PON port links to each other with optical branching device, and this optical branching device links to each other with a plurality of domestic consumer ONT again.Be EB with a domestic consumer ONT between still adopt P2MP to be connected topological structure, with the saving optical fibre installation.Link to each other by a trunk optical fiber between above-mentioned EB and the OLT.
P2P between above-mentioned each ONU and the EB connects can adopt the ethernet physical layer connection, and EB also can adopt ethernet physical layer to connect to OLT, but the data link layer between OLT and ONU adopts the data link layer of PON.
The major function of above-mentioned EB comprises: after the uplink optical signal that each ONU or ONT are sended over converges, send to OLT, after the downlink optical signal that OLT is sended over decomposes, send to each ONU or ONT respectively by each branch optical fiber.
Each light access physical port or PON port are carried out the light detection, when detection finds that abnormal luminous phenomenon appears in certain light access physical port or PON port, then cut off the data feedback channel of this light access physical port or PON port; Report the light that abnormal luminous phenomenon occurs to insert physical port or PON port to OLT, and/or light insert the ONU of physical port correspondence.
When the port of the abnormal luminous phenomenon of above-mentioned appearance is that the light of above-mentioned backhaul as the base station is when inserting physical port, then only cut off the data feedback channel of an ONU of this light access physical port correspondence, avoided this abnormal luminous ONU to continue to illegally occupy data feedback channel, and the data feedback channel of other ONU or ONT has not been influenced; When the port of the abnormal luminous phenomenon of above-mentioned appearance is the above-mentioned PON port that inserts as the domestic consumer, then cut off the data feedback channel of a plurality of domestic consumers' that comprise abnormal luminous ONT ONT simultaneously, to not influence of data feedback channel as the PON port of each ONU correspondence of the backhaul of base station.
The concrete structure of EB will be described in detail in the following embodiments.
The major function of above-mentioned OLT comprises: the light of the abnormal luminous phenomenon of appearance that reception OLT reports inserts physical port, and/or the ONU of light access physical port correspondence, determines abnormal luminous ONU, orders this ONU to stop to send uplink optical signal.Each ONU and ONT are found range, distribute the moment and the duration that occupies data feedback channel for each ONU and ONT according to the range finding result.Comprise: abnormality processing module and range finding processing module.
Wherein, the abnormality processing module, the light that is used to receive the abnormal luminous phenomenon of appearance that EB reports inserts the optical network device information that physical port and/or light insert the user side of physical port correspondence, determines abnormal luminous ONU, and orders this abnormal luminous ONU to stop to send uplink optical signal;
Wherein, the range finding processing module is used for each ONU and ONT are found range, and distributes the initial moment and the duration that occupies data feedback channel for each ONU and ONT according to the range finding result.
Embodiment two
This embodiment provide based on the structural representation of the EB of OA shown in Fig. 3 a, Fig. 3 b, Fig. 3 c and Fig. 3 d.
In Fig. 3 a, Fig. 3 b, Fig. 3 c and Fig. 3 d, EB is by splitter (Tap), duplexer, optical branching device, optical switch, photodetector (OD, Optical Detector), embedded ONT, up optical branching device or wavelength division multiplexer (WDM, wavelength division multiplex), descending optical branching device or WDM, upgoing O A (power amplifier) and descending OA form.Above-mentioned duplexer can be loopback device or WDM, and each road light signal that above-mentioned optical branching device is told all is impartial, and each road light signal that Tap tells is not necessarily impartial, and preferred, Tap can only be coupled out a fraction of light and be used for detecting, energy savings.Wherein, in Fig. 3 a, same wavelength is all adopted in the ONU uplink and downlink, all adopts optical branching device; In Fig. 3 b, the same wavelength of the up employing of ONU adopts optical branching device, and descending employing different wave length adopts WDM; In Fig. 3 c, the up employing different wave length of ONU adopts WDM, and the same wavelength of descending employing adopts optical branching device; In Fig. 3 d, different wave length is all adopted in the ONU uplink and downlink, all adopts WDM.
EB among above-mentioned Fig. 3 except connect and the PON port as the backhaul of base station of ONU correspondence, also connect and the PON port as domestic consumer's access of ONT correspondence.
Tap is used to receive ONU/ONT by the uplink optical signal of PON port to the EB transmission, branches out part optical signals from this uplink optical signal, and sends to OD.The corresponding Tap of each PON port, the corresponding OD of each Tap.
OD, as the abnormal luminous phenomenon detection module among the EB, the light signal that is used for that Tap is transmitted carries out light and detects, judge that according to testing result the light that receives this light signal inserts physical port and abnormal luminous phenomenon whether occurs, after judging this light and inserting physical port and abnormal luminous phenomenon occurs, send to optical switch and to cut off the order that this light inserts the data feedback channel of physical port, and the light access physical port information that abnormal luminous phenomenon will occur sends to embedded ONT.
Embedded ONT, as the abnormal luminous Port Management module among the EB, the light that is used to manage the abnormal luminous phenomenon of appearance that each OD passes over inserts physical port information, reports the light that abnormal luminous phenomenon occurs to insert the ONU information that physical port and/or light insert the physical port correspondence by trunk optical fiber to OLT.
An embedded ONT is set among the EB, and this embedded ONT links to each other with each OD respectively, and OLT can and dispose each OD by embedded ONT management.Alternatively, embedded ONT inserts the moment and the duration information that ONU under physical port occupies up optical channel for OD provides OLT to distribute to each light.
Optical switch, be arranged between duplexer and the optical branching device, be used for cutting off the data feedback channel that corresponding light inserts physical port, make EB no longer receive the light signal that corresponding light inserts the data feedback channel transmission of physical port receiving after cut-out light that OD transmits inserts the order of physical port.In actual applications, optical switch can also be between Tap and duplexer.
Duplexer is used to realize the single fiber bidirectional transmit-receive.
Up optical branching device or up WDM are used to receive the uplink optical signal from each ONU or ONT, after this uplink optical signal is converged, send to upgoing O A;
Upgoing O A is used to receive the uplink optical signal that up optical branching device or up WDM send over, and after this uplink optical signal is amplified, sends to OLT;
Descending OA is used to receive the downlink optical signal that OLT sends over, and after this uplink optical signal is amplified, sends to descending optical branching device or WDM;
Descending optical branching device or descending WDM are used to receive the downlink optical signal that descending OA sends over, and after this downlink optical signal is decomposed, send to each ONU or ONT respectively.
The processing procedure of EB among above-mentioned Fig. 3 is as follows:
At up direction, Tap receives ONU/ONT by the uplink optical signal of port to the EB transmission, branches out the sub-fraction light signal from this uplink optical signal, and sends to OD.The most uplink optical signal that Tap will receive all sends to duplexer, and duplexer sends to up optical branching device (or WDM) with the uplink optical signal that receives.Up optical branching device (or WDM) sends to upgoing O A after the uplink optical signal from each PON port that receives is converged, and upgoing O A sends to OLT by trunk optical fiber after the uplink optical signal that receives is amplified.
At down direction, after the downlink optical signal that descending OA sends over OLT amplifies, send to descending optical branching device (or WDM).Descending optical branching device (or WDM) sends to each ONU/ONT respectively by duplexer, Tap after the downlink optical signal that receives is separated.
OD is equivalent to an OLT receiver, after receiving the uplink optical signal that Tap transmits, this uplink optical signal is discerned detection, judges whether the PON port of this uplink optical signal of transmission abnormal luminous phenomenon takes place.
The method that the uplink optical signal that above-mentioned EB sends over by light access physical port ONU is discerned detection comprises:
1, OD is to physical layer signal in the uplink optical signal or medium access control layer (MAC, MdiumAccess Control) signal is resolved, in the time can't parsing the frame structure of described physical layer signal or MAC layer signal, then judge in the light access physical port that transmits this uplink optical signal to have abnormal luminous phenomenon, promptly this light inserts the ONU of physical port correspondence abnormal luminous.
2, OLT provides each light of EB to insert the moment and duration that ONU under physical port occupies up optical link by embedded ONT, for example, embedded ONT inserts the moment and the duration that ONU1 under the physical port 1 occupies up optical link for OD1 provides OLT to distribute to light, insert the moment and the duration that physical port m ONUm down occupies up optical link for ODm provides OLT to distribute to light, for ODh provide OLT distribute to ONTm+ 1, ONTm+2 under the light access physical port h ..., ONTn occupies the moment and the duration of up optical link.
OD occupies the moment and the duration of up optical channel according to predetermined ONU, in corresponding time slot, ONU is measured by the power and the error rate that light inserts the uplink optical signal of physical port transmission, measurement result and the threshold value of being scheduled to are compared, judge according to comparative result described light inserts in the physical port whether have abnormal luminous phenomenon; Perhaps OD reports OLT with the power of light signal and the measurement result of the error rate by embedded ONT, judges that according to measurement result described light inserts in the physical port whether have abnormal luminous phenomenon, notifies OD with judged result by embedded ONT again by OLT.
OD inserts the physical port correspondence at the light of judging uplink optical signal ONU is after abnormal luminous, send the order of cutting off this light access physical port to optical switch, after optical switch receives this order, turn-off the data feedback channel that this light inserts physical port, the light access physical port information that abnormal luminous phenomenon also will appear in OD sends to embedded ONT.
The light that embedded ONT manages the abnormal luminous phenomenon of appearance that each OD transmits inserts physical port information, report the light that abnormal luminous phenomenon occurs to insert physical port or PON port to OLT, and/or light inserts the ONU of physical port correspondence.
The light that OLT receives on the EB of the abnormal luminous phenomenon that embedded ONT reports inserts physical port or PON port, and/or after light inserts the ONU of physical port correspondence.If judging the light that abnormal luminous ONU appears at as the backhaul of base station inserts on the physical port, at this moment, OLT/EB can orient abnormal luminous ONU at once, then can in time cut off the uplink of the light access physical port of this abnormal luminous ONU by optical switch, OLT can stop to send uplink optical signal by this abnormal luminous ONU of control that issues orders then.At this moment, unaffected to the uplink of the PON port of other ONU/ONT, and the downlink of this abnormal luminous ONU still kept unimpeded.
Appear on the PON port that the domestic consumer inserts if judge abnormal luminous ONT, then can in time cut off the uplink of this abnormal luminous PON port, the downlink of this abnormal luminous PON port is still kept unimpeded by optical switch.
Then, OLT can stop to send uplink optical signal by all ONT under this abnormal luminous PON port of control of issuing orders, and record total optical power value at this moment.
When total optical power value is 0, then OLT orders the ONT under the above-mentioned abnormal luminous PON port to send uplink optical signal one by one, and the uplink optical signal that each ONT sends is resolved by OD, if the uplink optical signal of i ONT transmission can't be resolved, judge that then this ONT is abnormal luminous ONT.
When total optical power value was not 0, then OLT ordered the ONT under the above-mentioned abnormal luminous PON port to send uplink optical signal one by one, and the total optical power value before and after relatively if do not change, judges that then this ONT then is abnormal luminous ONT then; If change, then order this ONT to stop to send uplink optical signal again, continue the detection of next ONT, until orienting abnormal luminous ONT.
Embodiment three
This embodiment provide (OEO, the structural representation of EB Optical-Electrical-Optical) is shown in Fig. 4 a, Fig. 4 b based on photoelectricity light.
In Fig. 4 a, EB is made up of duplexer, optical branching device, Optical Receivers (RX), optical transmission module (TX), OD, optical time domain reflectometer (OTDR, Optical Time DomainReflectometer), poly-(MUX) module of remittance, electricity distribution (DeMUX) module and embedded ONT.
The processing procedure of EB shown in Fig. 4 a is as follows:
Up RX receives the uplink optical signal that ONU/ONT sends to EB by port, and converts uplink optical signal to uplink electrical signals.Up RX transfers PON physical layer light signal to the PON physical layer signal of telecommunication, and produces again and add lead code, or termination PON physical layer, obtain the up mac frame of PON, be equivalent to the receiving processing module of an embedded OLT.The up PON physical layer signal of telecommunication or the up mac frame of PON that up RX will obtain send to remittance collection module.
The poly-module of remittance is used for the signal of telecommunication of multichannel is converged into one road signal of telecommunication.The poly-module of remittance can be the PON physical layer signal of telecommunication of multichannel to be passed through synthetic one road PON physical layer signal of telecommunication of mode of TDM, perhaps the up mac frame of the PON of multichannel is synthesized the up mac frame of one road PON by the mode of TDM.The road PON physical layer signal of telecommunication or the up mac frame of one road PON that the poly-module of remittance will obtain send to up TX.
Up TX is used to convert the electrical signal to light signal, and sends this light signal to OLT.Up TX will transfer PON physical layer light signal to from the PON physical layer signal of telecommunication of the poly-module of remittance to send, or the up mac frame of PON from the poly-module of remittance is carried out the PON physical layer process after, send light signal to OLT again.
Up RX also branches out the sub-fraction light signal from the uplink optical signal that receives, and sends to OD.OD discerns detection to the uplink optical signal that receives, and judges whether the light access physical port of this uplink optical signal of transmission abnormal luminous phenomenon takes place.OD discerns the method for detection to this uplink optical signal can be identical with the foregoing description two described methods.After OD identifies abnormal luminous light access physical port, send the order of cutting off this light access physical port to up RX, after up RX receives this order, turn-off the data feedback channel that this light inserts physical port, the light access physical port that abnormal luminous phenomenon also will appear in OD sends to embedded ONT.
The downlink optical signal from OLT that descending RX will receive sends to electric distribution module.The electricity distribution module is used for one tunnel the signal of telecommunication demultiplexing signal of telecommunication, can be the mode demultiplexing PON down physical layer signal of telecommunication that one tunnel the PON down physical layer signal of telecommunication is passed through TDM, perhaps with the mode demultiplexing signal of telecommunication of the descending mac frame of one tunnel PON by TDM.The electricity distribution module sends to each descending TX respectively with the multichannel downlink electrical signal that obtains.Descending TX is a downlink optical signal with the downlink electrical conversion of signals that receives again, sends to each ONU/ONT.
The light that the OTDR module is arranged at as the backhaul of base station inserts physical port, the OTDR module sends light pulse by descending TX to the PON port, OD measures the OTDR reflected signal that returns from light access physical port, this OTDR reflected signal comprises the light signal of Rayleigh scattering and Fresnel reflection, and measurement result is reported the OTDR module.The measurement result that the OTDR module reports according to OD can be located EB each separate event to the ONU link, comprising the incidents such as decay, reflection and fault of connector, hinge joint, light distributor, coupler.Above-mentioned OTDR measurement result can also report to OLT by embedded ONT, carries out the optical link diagnosis to support OLT.
Above-mentioned OTDR is arranged at light and inserts the physical port side, has solved when OTDR places OLT, and the signal overlap of each branch optical fiber reflected back can't be differentiated the technical barrier of branch optical fiber.
Above-mentioned ONU connects to the P2P between the EB can adopt the ethernet physical layer connection, and EB also can adopt ethernet physical layer to connect to OLT, but the data link layer between OLT and ONU adopts the data link layer of PON.
EB shown in above-mentioned Fig. 4 a can combine with ethernet technology, obtains EB as shown in Figure 5.In this EB, RX is that Ethernet receiver module (ETH RX), TX are that Ethernet sending module (ETHTX), remittance gather and electric distribution module is LAN SW (LAN Switch, a LAN exchange) module.The basic process of this EB is identical with the basic process of the EB shown in Fig. 4 a.
In the EB shown in Fig. 4 b, replaced upgoing O A among Fig. 3 a with up RX and up TX, replaced descending OA among Fig. 3 a with descending RX and descending TX.Based among OA and the EB that OEO mixes, only replaced descending OA among Fig. 3 a, and reservation upgoing O A is constant shown in Figure 6 with descending RX and descending TX.The basic process of above-mentioned Fig. 4 b and EB shown in Figure 6 is identical with the basic process of the EB shown in Fig. 3 a.
In sum, the embodiment of the invention will be by inserting the topological structure that adopts P2P between physical port and the ONU as the light of the backhaul of base station, when ONU equipment abnormal luminous occurring, it is that problem has appearred in which ONU that EB can orient exactly, thereby makes whole PON network and base station can resist the abnormal luminous of ONU equipment effectively.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1, a kind of extender equipment EB of Optical Access Network, it is characterized in that, this extender equipment is an active equipment, comprise optical amplification device and/or photoelectricity light conversion device, described EB provides a plurality of light to insert physical port, each light inserts physical port and links to each other by the optical network device of optical fiber with a user side, after described EB will be coupled from the uplink optical signal that a plurality of light access physical ports receive, send to the optical line terminal OLT of network side, and after the downlink optical signal that OLT sends over decomposed, send to the optical network device of each user side respectively by each optical fiber, described EB also comprises:
Abnormal luminous phenomenon detection module, be used for the optical network device of user side is detected to the uplink optical signal that described EB sends by light access physical port, judge according to testing result described light inserts in the physical port abnormal luminous phenomenon whether occurs, the light that abnormal luminous phenomenon occurs is inserted physical port information send to abnormal luminous Port Management module, send and cut off the order that the light that abnormal luminous phenomenon occurs inserts the data feedback channel of physical port;
Abnormal luminous Port Management module, the light that is used to manage the abnormal luminous phenomenon of appearance that abnormal luminous phenomenon detection module passes over inserts physical port information, reports the light that abnormal luminous phenomenon occurs to insert the optical network device information that physical port and/or light insert the user side of physical port correspondence to described OLT.
2, EB according to claim 1 is characterized in that, described EB also comprises:
Optical switch, the cut-out light that is used for sending over according to abnormal luminous phenomenon detection module inserts the data feedback channel order of physical port, cut off the data feedback channel of corresponding light access physical port, make described EB no longer receive the uplink optical signal that corresponding light inserts the data feedback channel transmission of physical port;
Splitter, the optical network device that is used to receive user side is told part optical signals, and is sent to abnormal luminous phenomenon detection module by the uplink optical signal of light access physical port to described EB transmission from this uplink optical signal.
3, EB according to claim 2 is characterized in that, described abnormal luminous phenomenon detection module specifically comprises: at least one in judge module and the time slot inspection judge module analysed in photodissociation;
Judge module is analysed in photodissociation, be used for the physical layer signal or the medium access control layer MAC layer signal of the uplink optical signal that receives are resolved, in the time can't parsing the frame structure of described physical layer signal or MAC layer signal, then judge in the light access physical port that transmits this uplink optical signal to have abnormal luminous phenomenon;
Time slot is checked judge module, take the initial moment and the duration of up optical channel according to the optical network device of predetermined user side, the optical network device that obtains this user side inserts the uplink optical signal that physical port sends by light, the power and the error rate to this uplink optical signal are measured, and judge according to measurement result described light inserts in the physical port whether have abnormal luminous phenomenon; Perhaps measurement result is sent to abnormal luminous Port Management module, by abnormal luminous Port Management module measurement result is reported described OLT again, receive described OLT and insert the judged result that whether has abnormal luminous phenomenon in the physical port by the described light that abnormal luminous Port Management module sends over.
4, EB according to claim 2 is characterized in that, described EB also comprises:
Duplexer is used for receiving the light signal that splitter is isolated and sended over from uplink optical signal, and this light signal is sent to optical branching device or wavelength division multiplexer; Receive the light signal that optical branching device or wavelength division multiplexer issue, this light signal is sent to the optical network device of user side by optical fiber;
Optical branching device or wavelength division multiplexer after being used for the light signal that each duplexer sends over is coupled, send to described OLT, after the downlink optical signal that described OLT is sended over decomposes, send to each duplexer respectively.
5, EB according to claim 1 is characterized in that, described EB also comprises:
Adopt ethernet physical layer to connect between the optical network device of described user side and the described EB, ethernet physical layer connects between described EB and the described OLT, and the data link layer between the optical network device of described OLT and user side adopts the data link layer of PON.
6, a kind of optical communication system, it is characterized in that, comprise optical line terminal OLT that is arranged at network side and a plurality of optical network devices that are arranged at user side, the optical network device of OLT and user side is connected by the Optical Distribution Network of point to multiple spot, and described point comprises to the Optical Distribution Network of multiple spot: as each described extender equipment EB of claim 1 to 5.
7, optical communication system according to claim 6 is characterized in that,
Described EB reports the information of the optical network device of the light access physical port of the abnormal luminous phenomenon of appearance and/or the user side that light inserts the physical port correspondence to described OLT;
Described OLT specifically comprises:
The abnormality processing module, the light that is used to receive the abnormal luminous phenomenon of appearance that EB reports inserts the optical network device information that physical port and/or light insert the user side of physical port correspondence, determine the optical network device of abnormal luminous user side, and order the optical network device of this abnormal luminous user side to stop to send uplink optical signal;
The range finding processing module is used for the optical network device of each user side is found range, and distributes the initial moment and the duration that occupies data feedback channel for the optical network device of each user side according to the range finding result.
8, a kind of processing method of abnormal luminous fault of Optical Access Network, it is characterized in that, described Optical Access Network comprises extender equipment EB, and described EB is arranged between the optical line terminal OLT of a plurality of optical network devices of user side and network side, and described method comprises:
Described EB detects by the uplink optical signal that light access physical port sends over the optical network device of user side, and the optical network device of user side is corresponding one by one with described light access physical port;
Described EB judges according to testing result described light inserts in the physical port abnormal luminous phenomenon whether occurs;
Described EB inserts physical port according to the light that has abnormal luminous phenomenon, determines the optical network device information of abnormal luminous user side, and cuts off the data feedback channel of the optical network device of this abnormal luminous user side.
9, method according to claim 8, it is characterized in that, described EB detects by the uplink optical signal that light access physical port sends over the optical network device of user side, judge that according to testing result described light inserts the process that whether occurs abnormal luminous phenomenon in the physical port, comprising:
Described EB resolves physical layer signal in the uplink optical signal that receives or MAC layer signal, in the time can't parsing the frame structure of described physical layer signal or MAC layer signal, then judge in the light access physical port that transmits this uplink optical signal to have abnormal luminous phenomenon;
Perhaps,
Described EB takies the initial moment and the duration of up optical channel according to the optical network device of predetermined user side, the optical network device that obtains this user side inserts the uplink optical signal that physical port sends by light, the power and the error rate to this uplink optical signal are measured, and judge that according to measurement result described light inserts physical port and whether has abnormal luminous phenomenon; Perhaps measurement result is reported OLT, the described light that reception OLT sends over inserts the judged result that whether has abnormal luminous phenomenon in the physical port.
10, according to Claim 8 or 9 described methods, it is characterized in that described method also comprises:
Described EB reports the light that abnormal luminous phenomenon occurs to insert the information of the optical network device that is arranged at user side of physical port and/or light access physical port correspondence to described OLT;
The optical network device that described OLT determines certain user side is ordered the optical network device of described user side to stop to send uplink optical signal, and is still opened the down going channel of the optical network device of described user side after abnormal luminous.
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