CN101944949B - Optical transmission control method in optical network, optical network device and system - Google Patents
Optical transmission control method in optical network, optical network device and system Download PDFInfo
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Abstract
The embodiment of the invention relates to the field of communication and particularly discloses an optical transmission control method in an optical network, an optical network device and a system. The method comprises the following steps of: generating a multi-point control protocol (MPCP) message, wherein the MPCP message comprises an identification of a detected ONU (Optical Network Unit) and time interface information which is distributed to the detected ONU and used for sending an uplink optical signal; sending the MPCP message to the detected ONU; receiving the uplink optical signal sent by the detected ONU in the distributed time interval; detecting the received uplink optical signal; and determining the optical power of the uplink optical signal. The invention avoids the bandwidth waste caused by distributing the bandwidth to the detected ONU through a DBA module so as to detect the optical power in an optical power detection process in the prior art.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of optical networks transfer control method, optical network apparatus and system.
Background technology
PON (Passive Optical Network, EPON) technology is a kind of point-to-multipoint optical fiber access technology.PON is generally by the OLT (Optical Line Terminal, optical line terminal) of office's side, ONU (Optical Network Unit, optical network unit) and ODN (Optical Distribution Network) composition of user's side.A PON port of OLT can access multiple ONU.
EPON (Ethernet passive Optical Network, ethernet passive optical network) be the one in PON technology, it has adopted PON technology in physical layer, uses Ethernet protocol at link layer, utilizes the topological structure of PON to realize the access of Ethernet.Therefore, it combines the advantage of PON technology and ethernet technology.
In EPON system, for the optical fiber link between OLT and ONU is monitored and safeguarded, need to obtain the performance parameter of the optical fiber link between OLT and ONU.Available technology adopting received optical power is measured RSSI (Received Signal Strength Indication), and the power of the burst luminous signal that OLT sends ONU is measured above-mentioned parameter.Detailed process is as follows:
Photoelectric current corresponding to burst luminous signal that OLT sends ONU carries out current mirror sampling, obtain the image current of photoelectric current, convert image current to voltage again, and then to the voltage maintenance of sampling, then adopt analog to digital converter (Analog-to-Digital Conventer, ADC) voltage sampling being kept carries out analog-to-digital conversion, obtains digital signal, finally carries out luminous power calculating.In said process, ONU must continue to send light signal, so that OLT carries out the calculating of light signal collection and luminous power.
Realizing in process of the present invention, inventor finds that in prior art, there are the following problems:
In prior art, in order to ensure that the burst luminous signal that ONU sends reaches certain duration, need to stop regular traffic, utilize independently optical power detection apparatus or restart registration or ranging process carries out measuring light power to ONU.Like this, impact to the normal work of other ONU.
Summary of the invention
The technical problem that the embodiment of the present invention will solve is to provide a kind of optical networks transfer control method, optical network apparatus and system, having optical line terminal is that the ONU that carries out measuring light power divides the time interval that is used in transmission uplink optical signal, make tested ONU send uplink optical signal in described time interval, to determine the luminous power of described uplink optical signal, make in the case of the bandwidth of each ONU in not needing to readjust the DBA update cycle, realize the measurement to luminous power.
For solving the problems of the technologies described above, embodiment provided by the present invention is achieved through the following technical solutions:
The embodiment of the present invention provides a kind of optical networks transfer control method, and described optical networks line terminal and optical network unit by Ethernet passive optical network protocol transmission data, is characterized in that, comprising:
For the tested optical network unit being registered in the multiple optical network units on optical line terminal divides the very first time interval that is used in Performance Detection, the described very first time is interval and adjacent for the second time interval of business transmission, and described the second time interval is the integral multiple that EPON carries out the update cycle of Dynamic Bandwidth Allocation;
Utilize Multi-point Control Protocol message that the temporal information in very first time interval is sent to described multiple optical network unit by Optical Distribution Network, described Multi-point Control Protocol message comprises the identification information of described tested optical network unit and is the information in the very first time interval for Performance Detection of described tested optical network unit distribution;
The receiving course that described multiple optical network units is responded to the light signal of described Multi-point Control Protocol message transmission is controlled, and makes optical line terminal detect business tested optical network unit and receive carrying at reception interval corresponding to described the second time interval at interval corresponding reception interval of the described very first time.
The embodiment of the present invention provides a kind of optical line terminal OLT, comprising:
Ethernet passive optical network MAC module, be used to the tested optical network unit in the multiple optical network units that are registered on optical line terminal to divide the very first time interval that is used in Performance Detection, the described very first time is interval and adjacent for the second time interval of business transmission, described the second time interval is the integral multiple that EPON carries out the update cycle of Dynamic Bandwidth Allocation, generate Multi-point Control Protocol message, described Multi-point Control Protocol message comprises the identification information of tested optical network unit and the information in the very first time interval for Performance Detection distributed for described tested optical network unit and described the second time interval is distributed to the information of registered optical network unit for business transmission,
Optical module, for described Multi-point Control Protocol message bearing is sent to described multiple optical network unit at downlink optical signal, and receive the uplink optical signal that described multiple optical network unit sends, described uplink optical signal comprises the light signal of the business that carries and the light signal of the not bearer service that tested optical network unit sends that optical network unit sends, detect the uplink optical signal sending in interval corresponding reception interval of the described very first time, determine the luminous power that described tested optical network unit sends.
The embodiment of the present invention provides a kind of optical network unit ONU, and this ONU comprises:
Parsing module, control module and optical module, wherein,
Described parsing module, for receiving and resolve the Multi-point Control Protocol MPCP message that comes from optical line terminal OLT, what obtain that the mark of tested ONU and described OLT distribute to described tested ONU distributes to the information of registered ONU for business transmission for sending for information and the described OLT in the very first time interval of the uplink optical signal of Performance Detection by the second time interval, the described very first time is interval and adjacent for the second time interval of business transmission, and described the second time interval is the integral multiple that EPON carries out the update cycle of Dynamic Bandwidth Allocation;
Described control module, for judging whether the mark of ONU of described MPCP message and the mark of the ONU of self mate, if coupling, control described optical module and in described very first time interval, send the not uplink optical signal of bearer service, and judge that described OLT distributes to registered ONU by the second time interval and whether comprises the information for business transmission of distributing to self for the information of business transmission, if had, control described optical module and send according to the information of the time interval for business transmission of distributing to self uplink optical signal of bearer service.
The embodiment of the present invention also provides a kind of EPON, comprises an optical line terminal OLT and multiple optical network unit ONU, and wherein, described OLT is connected to described multiple ONU by optical distribution network ODN;
Described OLT is used to the tested optical network unit in the multiple optical network units that are registered on optical line terminal to divide the very first time interval that is used in Performance Detection, the described very first time is interval and adjacent for the second time interval of business transmission, described the second time interval is the integral multiple that EPON carries out the update cycle of Dynamic Bandwidth Allocation, and utilize Multi-point Control Protocol message that the temporal information in very first time interval is sent to described multiple optical network unit by Optical Distribution Network, described Multi-point Control Protocol message comprise the identification information of described tested optical network unit and for described tested optical network unit distribute for detection of the information in very first time interval, the receiving course that described multiple optical network units is responded to the light signal of described Multi-point Control Protocol message transmission is controlled, record in the interval luminous power that detects tested optical network unit of the described very first time,
Described ONU, for receiving and resolve the described MPCP message that comes from described OLT, obtains the identification information of tested ONU and the very first time block information for Performance Detection for described tested ONU distribution; Whether the mark of determining the tested ONU in described MPCP message is marking matched with the ONU of self; If coupling sends the not uplink optical signal of bearer service by described ODN to described OLT in described very first time interval.
As can be seen here, in embodiments of the present invention, the tested ONU that directly gives of OLT distributes a time interval that sends uplink optical signal, the mark of tested ONU and tested ONU are sent to the Information encapsulation of time interval of uplink optical signal in MPCP message, generate MPCP message, and this MPCP message is sent to tested ONU, and tested ONU sends uplink optical signal in above-mentioned time interval, and OLT detects the power of the uplink optical signal that tested ONU sends in above-mentioned time interval.Can find thus, the embodiment of the present invention does not need to readjust in the DBA update cycle bandwidth of each ONU in each frame, but OLT distributes a time interval that sends uplink burst light signal directly to tested ONU, in the time interval that tested ONU can distribute at OLT, take a relatively large bandwidth, and the bandwidth for transmission data that each ONU originally distributed according to DBA module within the update cycle of DBA, therefore can avoid the waste of bandwidth, also can not impact the normal work of the ONU that does not carry out rssi measurement, implement simple and flexible, operability significantly strengthens.
Brief description of the drawings
Fig. 1 shows DBA module is distributed bandwidth schematic diagram to tested ONU;
Fig. 2 shows the flow chart of embodiment of the method in the embodiment of the present invention;
Fig. 3 shows the schematic diagram of the time interval distributing in the embodiment of the present invention;
Fig. 4 shows the structural representation of optical line terminal OLT in the embodiment of the present invention;
Fig. 5 shows the structural representation of optical network unit ONU in the embodiment of the present invention;
Fig. 6 shows the structural representation of system embodiment in the embodiment of the present invention.
Embodiment
Understand and realize the present invention for the ease of persons skilled in the art, now describing by reference to the accompanying drawings embodiments of the invention.At this, schematic description and description of the present invention is used for explaining the present invention, but not as a limitation of the invention.
As shown in Figure 1, a update cycle of DBA is m frame, the representative value of m is 8, this example is taking the update cycle as 8 frames are as example, in normal operation, while not needing to carry out rssi measurement, DBA is the bandwidth that each ONU under PON port of OLT distributes a need of work, the bandwidth taking in a frame (125us) as ONU1 in figure is 25us, and ONU1 can transmit data within the time of this 25us.In the time that needs carry out rssi measurement, DBA module is in order to distribute a larger bandwidth to tested ONU (if ONU1 in Fig. 1 is tested ONU), will be to OUN2 ... the bandwidth of ONUn is adjusted, in increasing the bandwidth of ONU1, be reduced to OUN2 ... the bandwidth that ONUn distributes, specifically as bandwidth schematic diagram when rssi measurement in Fig. 1.After rssi measurement completes, DBA module returns to normal operating conditions by the bandwidth of distributing for each ONU again, but because DBA module is every through m frame, the bandwidth that just can take in every frame each ONU is once upgraded or adjusts.As shown in Figure 1, the cycle that DBA module is upgraded is 8 frames, every frame is 125us, the update cycle that is DBA module is 1000us, need to be to ONU1 distribution ratio as the bandwidth of 100us at least and carry out rssi measurement, as shown in fig. 1, during rssi measurement, within a update cycle of DBA (8 frame), ONU1 has taken at least 100us at every frame, and in practice, measuring luminous power only needs the time of 100us, that is to say that the bandwidth of distributing in the first frame just can meet the needs of measurement within a update cycle of DBA, and other 7 frame does not carry out the measurement of luminous power, only be used for normal transmission data, and ONU1 only needs the bandwidth of 25us in the time of normal transmission data, so within a update cycle of DBA, ONU1 at least will waste the bandwidth of 75us × 7=525us, within the update cycle of a DBA, the shared ratio of bandwidth of waste is 525us/ (125us × 8)=52.5%, simultaneously, do not carry out the ONU of rssi measurement for other, originally the bandwidth needing can not be guaranteed again.
The optical power measurement method that the embodiment of the present invention provides, be applied in the ethernet passive optical network (EPON) of the point-to-multipoint communication that comprises OLT and multiple ONU, be that the ONU that need to carry out rssi measurement distributes a rssi measurement time by OLT, in the case of the normal bandwidth of operation of the ONU under PON port of OLT not being adjusted, realize the measurement of received optical power, thereby provide foundation for the link performance situation of analyzing between OLT and ONU.
In the embodiment of the present invention, as shown in Figure 2, the method comprises a kind of method flow diagram of measuring light power:
The MAC chip of S101:OLT is that the tested optical network unit in the multiple optical network units that are registered on optical line terminal divides the interval T1 of the very first time that is used in Performance Detection.Wherein, interval T1 of this very first time and adjacent for the second time interval T2 of business transmission, described the second time interval T2 is the integral multiple that EPON carries out the update cycle of Dynamic Bandwidth Allocation.
The CPU of OLT initiates ONU (being tested ONU) to ONU side and carries out received optical power while measuring, MAC chip to OLT sends the order of carrying out received optical power measurement, this order comprises the mark of the ONU (being tested ONU) that need to carry out measuring light power, the MAC chip of OLT is that tested optical network unit divides the interval T1 of the very first time that is used in rssi measurement, interval T1 of the very first time in the embodiment of the present invention is an adjacent time interval of the second time interval T2 of the update cycle integral multiple of DBA, specifically as shown in Figure 3, in Fig. 3, within a update cycle of DBA, there is m frame, the interval T1 of the very first time distributing is the rssi measurement time in Fig. 3, this very first time, interval T1 was independent of the second time interval T2, and adjacent with the second time interval T2.Optionally; for ensure measure with business between unaffected; time interval g1 (not shown) between T2 end point between interval T1 starting point of the very first time and interval T1 of very first time Second Region before can be set; and time interval g2 (not shown) between the second time interval T2 starting point after interval T1 end point of the very first time and interval T1 of the very first time; be referred to as measuring and protecting interval; wherein, time interval g1, g2 can be the same or different.Therefore, the MAC chip of OLT is for tested ONU is while distributing above-mentioned time interval, do not need to readjust in the DBA update cycle bandwidth of each ONU in each frame, reduced the impact of the bandwidth on other business.Wherein, the second time can be the update cycle of a DBA, or many times of the update cycle of DBA.In EPON, the frame length of Ethernet protocol is variable frame length, therefore, in the embodiment of the present invention, the length of interval T1 of the above-mentioned very first time is not limited, as long as can meet the required precision of measuring luminous power.Further, the time span of interval T1 of this very first time had better not have influence on the regular traffic transmission of other ONU.
Further, the information of above-mentioned time interval can comprise the start time information of time interval, the termination time information of time interval and the length information of time interval, or any two kinds of information wherein.
S102: utilize MPCP (Multi-Point Control Protocol, Multi-point Control Protocol) message, by Optical Distribution Network, the information of interval T1 of the very first time of distributing for tested optical network unit is sent to multiple optical network units.Wherein, this MPCP message comprises the identification information of tested optical network unit and is the information of the interval T1 of the very first time for Performance Detection of described tested optical network unit distribution.
OLT produces the order of a burst measuring light power, in this order, include the mark of tested ONU, and according to the mark of the tested ONU in this burst measuring light power order, for dividing, tested ONU is used in the very first time interval that sends uplink optical signal, and by the mark of tested ONU and be the Information encapsulation of the described time interval that distributes of tested ONU in MPCP message, thereby generate the MPCP message sending to tested ONU.
As mentioned above, in the descending MPCP message of EPON, carry the information of identification information and the interval T1 of the very first time of tested ONU, above-mentioned MPCP message is sent to multiple ONU by OLT, tested ONU receives after the descending MPCP message of OLT transmission, obtain described MPCP message from downlink frame MPCP message parse, from this MPCP message, obtain the mark of tested ONU and OLT and be that tested ONU distributes for sending the information of interval T1 of the very first time of uplink optical signal; Then, tested ONU compares the mark of the ONU in MPCP message and own ONU mark, if do not mated, OLT be tested ONU distribute keep mourning in silence for sending in the very first time interval T1 of uplink optical signal; If coupling, OLT be this tested ONU distribute send uplink optical signal for sending in the time interval T1 of uplink optical signal, this uplink optical signal carries the mark of ONU, it is the mark of tested ONU, so that OLT is receiving after this uplink optical signal, can determine the beginning of reception interval and detect the power of this uplink optical signal.
S103: the receiving course that multiple optical network units is responded to the light signal that described Multi-point Control Protocol message sends is controlled, and makes to detect at reception interval corresponding to interval T1 of the described very first time luminous power of tested optical network unit.
Owing to being connected in the upper multiple ONU non-interrupting services of OLT, for OLT, it continues to receive the uplink optical signal that multiple ONU send, comprising the light signal of ONU transmission and the light signal of tested ONU transmission of normally commencing business, OLT controls the receiving course of uplink optical signal, thereby the luminous power that detects the light signal receiving at reception interval corresponding to interval T1 of the very first time obtains the luminous power that tested ONU sends, and receive the business of carrying at reception interval corresponding to the second time interval T2.OLT receives the uplink optical signal that tested ONU sends, and detect the mark of the ONU carrying in uplink optical signal, in the time the ONU that preserves in the mark of the ONU in uplink optical signal and OLT marking matched being detected, determine the beginning of time of reception, and give the information of the time interval of the transmission uplink optical signal of tested ONU distribution according to OLT, determine the length of reception interval.This reception interval is identical with described time interval, detects the uplink optical signal that tested ONU sends on this reception interval, determines the luminous power that tested ONU sends.Wherein, the uplink optical signal specifically sending according to ONU determines that the method for the luminous power of tested ONU transmission is: the MAC chip of OLT sends the order RSSI-Trig of rssi measurement, control optical module and carry out light signal sampling, sampled result is carried out to A/D (analog signal is to digital signal) and is converted to the value of luminous power.After the luminous power of uplink optical signal that has detected tested ONU transmission, the optical power value that can obtain according to detection, analyzes the link performance situation between OLT and ONU to be measured.
Concrete, OLT can meet the requirement that systematic function detects by adjusting the time span in the second time interval and/or very first time interval.Because the second time interval in the embodiment of the present invention is the integral multiple of DBA update cycle, OLT can adjust by adjusting the multiple of DBA update cycle the time span of the second time interval, if system is high to real-time testing requirement, the multiple that can reduce the DBA update cycle improves Performance Detection frequency, to ensure requirement of real-time; If system is high to newly energy accuracy of detection requirement of each ONU, can improve the time span of the second time interval, to ensure required precision.On the other hand, OLT can also detect frequency by the control performance that has or not to come of adjusting very first time interval, ensure bandwidth availability ratio simultaneously, the optical power value that for example OLT detects by statistics judges systematic function, do not distribute very first time interval if systematic function well can be controlled in a period of time, be made as 0 by the time span value in very first time interval.The DBA update cycle here need to arrange according to system, is generally the time span of m frame, and m is positive integer, and preferably value is 1,2,4,8,16; Each frame offers one or more ONU and sends upstream data.Isometric for the second time interval of business transmission below, be T1, T2 ... Tn is isometric, it is unified that for T, (Tn represents n the second time interval, not shown) describe for example, the DBA update cycle of system is 4 frames, the initial value of T is made as 2 times of DBA update cycle, OLT is that tested ONU in registered multiple ONU divides the very first time interval that is used in Performance Detection according to cycle T, the time span in the very first time interval that each tested ONU distributes can be set as required, the time span that can be certainly the very first time interval of multiple ONU distributing uniform is controlled to simplify, OLT controls from the receiving course of the uplink optical signal of multiple ONU reception, obtains the luminous power of interval corresponding reception interval of the very first time as the luminous power of tested ONU transmission from optical module.OLT, according to the luminous power that obtains tested ONU transmission, analyzes the link performance situation between OLT and tested ONU.The optical power value of the tested ONU that OLT can also detect by statistics is determined PON systematic function, if the functional value that can adjust T, as the DBA update cycle is brought up to 4 times from 2 times, OLT also can not adjust T value and only sign distribute the value in very first time interval, if the value of setting within a period of time between first is 0.It is elongated that OLT also can be configured to for the second time interval of business transmission, i.e. T1, T2 ... Tn elongated (Tn represents n the second time interval, not shown), and interval arranging of T1 of the very first time can be elongated or isometric., T1 can set different values as required.
In one embodiment of the invention, optical module by the light signal that receives the ONU transmission of normally commencing business provides the luminous power of tested ONU to detect, this optical module can be connected to the analysis and processing module that performance evaluation is provided, the optical power value that analysis and processing module can obtain according to detection, analyzes the link condition between OLT and tested ONU.
In the present embodiment, OLT distributes a time interval that sends uplink optical signal directly to tested ONU, the mark of tested ONU and tested ONU are sent to the Information encapsulation of time interval of uplink optical signal in MPCP message, generate MPCP message, and this MPCP message is sent to tested ONU, tested ONU sends uplink optical signal in above-mentioned time interval, and OLT detects the power of the uplink optical signal that tested ONU sends in above-mentioned time interval.Can find thus, the present embodiment does not need to readjust in the DBA update cycle bandwidth of each ONU in each frame, but OLT distributes a time interval that sends uplink burst light signal directly to tested ONU, in the time interval that tested ONU can distribute at OLT, take a relatively large bandwidth, and the bandwidth for transmission data that each ONU originally distributed according to DBA module within the update cycle of DBA, therefore can avoid the waste of bandwidth, also can not impact the normal work of the ONU that does not carry out rssi measurement, implement simple and flexible, operability significantly strengthens.
The embodiment of the present invention provides a kind of optical line terminal 40, and the structural representation of this OLT as shown in Figure 4, comprising:
EMAC (EPON MAC, Ethernet passive optical network MAC) module 42, be used for generating Multi-point Control Protocol MPCP message, the information in the very first time interval of the transmission uplink optical signal that carries the identification information of tested ONU in described Multi-point Control Protocol MPCP message and distribute for described tested ONU, this very first time is interval and adjacent for the second time interval of business transmission, and described the second time interval is the integral multiple that EPON carries out the update cycle of Dynamic Bandwidth Allocation.Wherein, EMAC module 42 also has the function of the time span of adjusting very first time interval and/or the second time interval, and specific implementation is referring to mentioned above.
Optical module 43, send to tested ONU for the described Multi-point Control Protocol MPCP message that described EMAC module 42 is generated, and receive the uplink optical signal that described tested ONU sends in described time interval, and detect the identification information of the ONU carrying in described uplink optical signal and whether the mark of described tested ONU mates, after coupling, determine the beginning of reception interval, and give according to OLT that tested ONU distributes for sending the information of time interval of uplink optical signal, determine the length of reception interval, on this reception interval, detect and receive the uplink optical signal that tested ONU sends, determine the luminous power of described uplink optical signal.Wherein, determine the same prior art of process of the luminous power of uplink optical signal according to the uplink optical signal receiving.
Above-mentioned optical line terminal OLT 40 can further include:
Adjusting module (not shown), for control described very first time interval have or not and/or the time span of described the second time interval to adjust the frequency of Performance Detection.Concrete, adjusting module can according to the described very first time interval of controls such as demand or external command of the PON systematic function detecting or PON system have or not and/or the time span of described the second time interval with the frequency of adjustment Performance Detection.Adjusting module can be to be built in EMAC module 23, also can be independent of EMAC module 23.
Processor CPU41, for initiating the tested ONU of ONU side to carry out the measurement of luminous power, and the mark of the ONU (being tested ONU) that needs are measured, send to EMAC module 42.
Wherein, EMAC module 42 specifically comprises: measuring light power command module 421, DBA module 422, MPCP module 423 and control module 424.Wherein,
Measuring light power command module 421, for according to the mark of described tested ONU, produces the measuring light power order that includes described tested ONU mark, and this measuring light power order is sent to described DBA module 422 and MPCP module 423.
The measuring command that DBA module 422 sends for received optical power measuring command module 421, and be that tested ONU distributes time interval according to the identification information of the tested ONU in this measuring command, and described time interval is sent to MPCP module 423.In the prior art, to carry out Dynamic Bandwidth Allocation and adjustment by DBA module 422, to upgrade the bandwidth that in the DBA update cycle, in each frame, each ONU takies, thereby come to distribute a relative large bandwidth to tested ONU, so that tested ONU can send a long-term uplink optical signal in this large bandwidth, for the happen suddenly measurement of luminous power of OLT.And in the present embodiment, distribute a time interval that sends uplink optical signal directly to tested ONU by DBA module 422, do not need DBA module 422 to carry out dynamic bandwidth adjustment and upgrade the bandwidth that each ONU takies, thereby distribute a large bandwidth to tested ONU, therefore also just can not cause the waste of bandwidth.
MPCP module 423, the identification information of the tested ONU sending for received optical power measuring command module 421, with DBA module 422 be the time interval information that tested ONU distributes, and by the mark of tested ONU and be the Information encapsulation of the described time interval that distributes of tested ONU in MPCP message, thereby generate the MPCP message sending to tested ONU.
Control module 424, for generation of control command, to optical module 43, described control command is carried out the measurement of luminous power for controlling optical module 43.
Optical module 44, also for determining after the luminous power of described uplink optical signal, definite optical power value is reported to CPU41, CPU41 analyzes the link performance between tested ONU and OLT according to the optical power value received, such as the relation etc. over time of the optical fiber link loss between the optical fiber link loss, tested ONU and the OLT that analyze between tested ONU and OLT.
The embodiment of the present invention provides a kind of optical network unit 50, and the structural representation figure of this network element 50 as shown in Figure 5, comprising:
Parsing module 51, control module 52 and optical module 53;
Parsing module 51, for receiving and resolve the Multi-point Control Protocol MPCP message that comes from OLT, obtain the identification information of tested ONU and the information in the very first time interval for Performance Detection that OLT distributes to tested ONU and OLT described the second time interval is distributed to the information of registered ONU for business transmission.It can be to distribute to the information of the time interval for business transmission of corresponding ONU for the information of business transmission that described the second time interval is distributed to registered ONU by OLT, can be also to distribute to the data volume of corresponding ONU and the loopback time delay of this ONU.
Whether control module 52, mate with tested ONU mark for the mark of the ONU that judges described MPCP message, if coupling is controlled in the very first time interval for Performance Detection that optical module 53 distributes to ONU to be measured at OLT and kept mourning in silence; If coupling, control optical module 53 and in the very first time interval for Performance Detection to tested ONU distribution, send the not uplink optical signal of bearer service at OLT, and judge that described OLT distributes to registered optical network unit by described the second time interval and whether has the information for business transmission of distributing to self for the information of business transmission, if had, control optical module 53 and send according to the information for business transmission of distributing to self uplink optical signal of bearer service.Wherein, this does not carry the mark of ONU (being tested ONU) 50 in the uplink optical signal of bearer service, so that OLT receives after this uplink optical signal, can be by the identification information in this uplink optical signal, determine that this uplink optical signal is the uplink optical signal that tested ONU sends, and then the beginning of definite reception interval, receive and detect the power of this uplink optical signal.It should be noted that the mark that can not carry ONU (being tested ONU) 50 in the uplink optical signal of bearer service not, in this case, dispatch and judge which tested ONU. the light signal receiving is from by OLT
The embodiment of the present invention provides a kind of EPON, the structural representation of this system as shown in Figure 6, comprise: optical line terminal OLT 61 and optical network unit ONU 63, optical network unit 63 comprises multiple tested ONU, the structure of this OLT61 as shown in Figure 4, the structure of optical network unit as shown in Figure 5.
OLT61 is connected to multiple ONU63 by optical distribution network ODN62, and wherein, OLT61 connects one end of optical distribution network ODN62, and the other end of ODN62 connects multiple optical network units.Below taking ONU-1 as example, be specifically set forth in OLT in this network and how realize the measurement of the burst luminous power to ONU.
Suppose that OLT61 initiates the measurement of the burst luminous power to ONU-1, to analyze the optical fiber link performance between optical line terminal OLT 61 and ONU-1.
OLT61 sends one or more MPCP message to registered ONU in the mode of broadcast, wherein, distribute a very first time interval for Performance Detection to ONU-1, and by the Information encapsulation in the mark of ONU-1 and the above-mentioned very first time interval for Performance Detection to MPCP message, described the second time interval is distributed to registered ONU and be also packaged into MPCP message for the information of business transmission, then OLT sends to MPCP message to be connected to the upper ONU of this ODN62 by ODN.Wherein, the same embodiment of the method for the generative process of MPCP message no longer describes in detail herein.It can be to distribute to the information of the time interval for business transmission of corresponding ONU for the information of business transmission that described the second time interval is distributed to registered ONU by OLT, can be also to distribute to the data volume of corresponding ONU and the loopback time delay of this ONU.
The ONU that is connected to ODN62 in Fig. 6 can receive the MPCP message that OLT sends.Wherein, each ONU receives and resolves the mark of the above-mentioned ONU-1 of including and the information in the very first time interval for Performance Detection that OLT distributes to ONU-1 and OLT the second time interval is distributed to the one or more MPCP message of registered ONU for the information of business transmission, obtain the mark of ONU-1 and the information in the very first time interval for Performance Detection that OLT61 distributes to ONU-1, the mark of ONU-1 and the mark of self are compared; If do not mated, for example the ONU of other except ONU-1 does not mate, and in the time interval that these ONU distribute to ONU-1 at OLT61, keeps mourning in silence, and does not send any uplink optical signal to OLT61; If coupling, ONU-1 finds the marking matched of the mark of tested ONU and own ONU, and ONU-1 sends the not uplink optical signal of bearer service at OLT in the very first time interval to ONU-1 distribution.Further, ONU-1 also can judge that OLT distributes to registered ONU by the second time interval and whether comprises the information for business transmission of distributing to self for the information of business transmission, if had, send the uplink optical signal of bearer service according to the information for business transmission of distributing to self.For other ONU except ONU-1, mourn in silence in interval maintenance of the very first time, if judge that OLT distributes to registered ONU by the second time interval and comprises the information for business transmission of distributing to self for the information of business transmission, send the uplink optical signal of bearer service according to the information for business transmission of distributing to self.
The uplink optical signal that ONU-1 sends sends to OLT61 by optical distribution network 62.
OLT61 receives the uplink optical signal that ONU-1 sends, and determines the power of this uplink optical signal, then, and the performance of the optical fiber link between power analysis ONU-1 and the OLT62 of the uplink optical signal that OLT61 can obtain according to detection.Wherein, the uplink optical signal that OLT61 sends according to ONU determines that the method for the power of this uplink optical signal specifically comprises: OLT receives the uplink optical signal of the not bearer service of tested ONU transmission, and detect the mark of the ONU carrying in uplink optical signal, in the time the ONU that preserves in the mark of the ONU in uplink optical signal and OLT marking matched being detected, determine the beginning of time of reception, and give the transmission of tested ONU distribution for the information in the very first time interval of Performance Detection according to OLT, determine the length of reception interval.This reception interval is identical with described time interval, detects the uplink optical signal that tested ONU sends on this reception interval; Then, the uplink optical signal obtaining according to detection, determines the luminous power of described uplink optical signal.Wherein, the uplink optical signal specifically reporting according to ONU determines that the method for the luminous power of light signal is: the MAC chip of OLT sends the order RSSI-Trig of rssi measurement, control optical module and carry out light signal sampling, sampled result is carried out to A/D (analog signal is to digital signal) and is converted to the value of luminous power.
By the above-mentioned elaboration to the embodiment of the present invention, can find out that the test process of the embodiment of the present invention can avoid the waste of bandwidth, also can not bring impact to the normal work of each ONU, implement simple and flexible, operability is very strong.
One of ordinary skill in the art will appreciate that, realize all or part of flow process in above-described embodiment method, can carry out the hardware that instruction is relevant by computer program to complete, described program can be stored in a computer read/write memory medium, this program, in the time carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-OnlyMemory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
The method, system and device of a kind of the measuring light power above embodiment of the present invention being provided are described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (11)
1. an optical networks transfer control method, described optical networks line terminal and optical network unit by Ethernet passive optical network protocol transmission data, is characterized in that, comprising:
For the tested optical network unit being registered in the multiple optical network units on optical line terminal divides the very first time interval that is used in Performance Detection, the described very first time is interval and adjacent for the second time interval of registered described multiple optical network unit business transmission, and described the second time interval is the integral multiple that EPON carries out the update cycle of Dynamic Bandwidth Allocation;
Utilize Multi-point Control Protocol message that the temporal information in very first time interval is sent to described multiple optical network unit by Optical Distribution Network, described Multi-point Control Protocol message comprises the identification information of described tested optical network unit and is the information in the very first time interval for Performance Detection of described tested optical network unit distribution;
The receiving course that described multiple optical network units is responded to the light signal of described Multi-point Control Protocol message transmission is controlled, and makes optical line terminal detect the luminous power of tested optical network unit at interval corresponding reception interval of the described very first time.
2. method according to claim 1, is characterized in that, for being registered to before tested optical network unit in the multiple optical network units on optical line terminal divides the very first time interval that is used in Performance Detection, also comprises:
The order of measuring light power is carried out in reception, and described order comprises the identification information of tested optical network unit.
3. method according to claim 1 and 2, is characterized in that,
Control described very first time interval have or not and/or the time span of described the second time interval to adjust the frequency of Performance Detection.
4. an optical line terminal OLT, is characterized in that, comprising:
Ethernet passive optical network MAC module, be used to the tested optical network unit in the multiple optical network units that are registered on optical line terminal to divide the very first time interval that is used in Performance Detection, the described very first time is interval and adjacent for the second time interval of business transmission, described the second time interval is the integral multiple that EPON carries out the update cycle of Dynamic Bandwidth Allocation, generate Multi-point Control Protocol message, described Multi-point Control Protocol message comprises the identification information of tested optical network unit and the information in the very first time interval for Performance Detection distributed for described tested optical network unit and described the second time interval is distributed to the information of registered optical network unit for business transmission,
Optical module, for described Multi-point Control Protocol message bearing is sent to described multiple optical network unit at downlink optical signal, and receive the uplink optical signal that described multiple optical network unit sends, described uplink optical signal comprises the light signal of the business that carries and the light signal of the not bearer service that tested optical network unit sends that optical network unit sends, detect the uplink optical signal sending in interval corresponding reception interval of the described very first time, determine the luminous power that described tested optical network unit sends.
5. OLT as claimed in claim 4, is characterized in that, further comprises: adjusting module, for control described very first time interval have or not and/or the time span of described the second time interval to adjust the frequency of Performance Detection.
6. OLT as claimed in claim 4, is characterized in that, described Ethernet passive optical network MAC module specifically comprises: measuring light power command module, and Dynamic Bandwidth Allocation DBA module, Multi-point Control Protocol MPCP module and control module, wherein
Described measuring light power command module, for producing and include the measuring light power order of described tested optical network unit marks according to the mark of tested optical network unit, and sends to described DBA module and described MPCP module by described measuring light power order;
Described DBA module, the described measuring light power order sending for receiving described measuring light power command module, and be that described tested ONU distributes described very first time interval according to the identification information of the described tested optical network unit in described measuring light power order, and described time interval is sent to described MPCP module;
Described MPCP module, for by the identification information of described tested ONU and described DBA module be the time interval Information encapsulation that distributes of described tested ONU to MPCP message, generate MPCP message;
Described control module, gives described optical module for generation of control command, and described control command is used for controlling described optical module and carries out measuring light power.
7. OLT as claimed in claim 6, it is characterized in that, described Ethernet passive optical network MAC module further comprises: adjusting module, for control described very first time interval have or not and/or the time span of described the second time interval to adjust the frequency of Performance Detection.
8. the OLT as described in claim 6 or 7, is characterized in that, further comprises:
Processor, for initiating tested optical network unit to carry out the measurement of luminous power, and sends to described Ethernet passive optical network MAC module by the mark of tested optical network unit.
9. an optical network unit ONU, is characterized in that, described ONU comprises:
Parsing module, control module and optical module, wherein,
Described parsing module, for receiving and resolve the Multi-point Control Protocol MPCP message that comes from optical line terminal OLT, what obtain that the mark of tested ONU and described OLT distribute to described tested ONU distributes to the information of registered ONU for business transmission for sending for information and the described OLT in the very first time interval of the uplink optical signal of Performance Detection by the second time interval, the described very first time is interval and adjacent for the second time interval of business transmission, and described the second time interval is the integral multiple that EPON carries out the update cycle of Dynamic Bandwidth Allocation;
Described control module, for judging whether the mark of ONU of described MPCP message and the mark of the ONU of self mate, if coupling, control described optical module and in described very first time interval, send the not uplink optical signal of bearer service, and judge that described OLT distributes to registered ONU by the second time interval and whether comprises the information for business transmission of distributing to self for the information of business transmission, if had, control described optical module and send according to the information of the time interval for business transmission of distributing to self uplink optical signal of bearer service.
10. an EPON, is characterized in that, comprises an optical line terminal OLT and multiple optical network unit ONU, and wherein, described OLT is connected to described multiple ONU by optical distribution network ODN;
Described OLT is used to the tested optical network unit in the multiple optical network units that are registered on optical line terminal to divide the very first time interval that is used in Performance Detection, the described very first time is interval and adjacent for the second time interval of registered described multiple optical network unit business transmission, described the second time interval is the integral multiple that EPON carries out the update cycle of Dynamic Bandwidth Allocation, and utilize Multi-point Control Protocol message that the temporal information in very first time interval is sent to described multiple optical network unit by Optical Distribution Network, described Multi-point Control Protocol message comprise the identification information of described tested optical network unit and for described tested optical network unit distribute for detection of the information in very first time interval, the receiving course that described multiple optical network units is responded to the light signal of described Multi-point Control Protocol message transmission is controlled, record in the interval luminous power that detects tested optical network unit of the described very first time,
Described ONU, for receiving and resolve the described Multi-point Control Protocol message that comes from described OLT, obtains the identification information of tested ONU and the very first time block information for Performance Detection for described tested ONU distribution; Whether the mark of determining the tested ONU in described Multi-point Control Protocol message is marking matched with the ONU of self; If coupling sends the not uplink optical signal of bearer service by described ODN to described OLT in described very first time interval.
11. EPONs according to claim 10, it is characterized in that, the receiving course that described multiple optical network units is responded to the light signal of described Multi-point Control Protocol message transmission is controlled, specifically comprise: the mark of the ONU carrying in the described uplink optical signal that described detection receives, in the time the ONU mark of carrying in described uplink optical signal and described tested ONU marking matched being detected, determine the beginning of reception interval, and time span using the time span in described very first time interval as described reception interval.
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| CN105359441B (en) * | 2013-05-15 | 2018-03-02 | 中兴通讯股份有限公司 | It is used for not calibrated optical network unit activating using noise window |
| WO2014183504A1 (en) * | 2013-05-15 | 2014-11-20 | Zte Corporation | Using noisy window for uncalibrated optical network unit activation |
| CN108574532B (en) * | 2017-03-13 | 2022-11-08 | 中兴通讯股份有限公司 | Optical signal power control method and device and optical line terminal |
| CN110086545B (en) | 2018-01-26 | 2021-06-22 | 华为技术有限公司 | OLT, ONU, PON system and information transmission method in PON system |
| CN117714914A (en) * | 2018-08-02 | 2024-03-15 | 有线电视实验室公司 | System and method for coherent burst reception |
| CN111526067B (en) * | 2020-04-26 | 2021-11-12 | 恒安嘉新（北京）科技股份公司 | Network shunt and communication method of network shunt |
| CN116614732A (en) * | 2020-11-28 | 2023-08-18 | 华为技术有限公司 | Method, device, computing equipment and storage medium for transmission scheduling |
| CN116684763A (en) * | 2022-02-23 | 2023-09-01 | 华为技术有限公司 | Optical distribution network device and signal processing method |
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