CN102511133A - method and system for finding optical network unit - Google Patents
method and system for finding optical network unit Download PDFInfo
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- CN102511133A CN102511133A CN2011800024960A CN201180002496A CN102511133A CN 102511133 A CN102511133 A CN 102511133A CN 2011800024960 A CN2011800024960 A CN 2011800024960A CN 201180002496 A CN201180002496 A CN 201180002496A CN 102511133 A CN102511133 A CN 102511133A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
- H04L12/2858—Access network architectures
- H04L12/2861—Point-to-multipoint connection from the data network to the subscribers
Abstract
The present invention discloses a method for finding optical network unit comprising: the optical line terminal broadcasts gate frame to the optical network unit,determining the newly added optical network unit exists if up response of the optical network unit is received besides the registration windowing time. The optical line terminal adjusts the frame number of the halt frame and broadcasts the halt frame to the optical network unit according to the adjusted frame number of the halt frame,the optical line terminal sends the request to the optical network unit to acquire the serial number and the ranging information of the newly added optical network unit. Correspondingly, the present invention also provides a device for finding the optical network unit and a passive optical network system. The present invention can automatically find the newly added optical network unit besides the range of the passive optical network system, and acquire the the serial number and the ranging information of the newly added optical network unit. Besides, the present invention also provides a technical scheme for adjusting the passive optical network configuration range so that the optical line terminal can perform on line registration for the found the whole or part of newly added optical network.
Description
Technical field
The present invention relates to communication technical field, specifically, relate to a kind of method and system of finding optical network unit.
Background technology
Along with the quickening gradually of IT application process, the internet has become the main platform that people obtain information, carry out information interchange as important information propagating pathway.Development along with " voice, data and video " three-in-one Internet service; Superiority developments such as the user is also improving the requirement of aspects such as the transmission range of network, transmission reliability, bandwidth gradually, and the Optical Access Network technology is low, easy for installation with stable performance, cost, be easy to safeguard become the network application technology of tool potentiality.
(Fiber to The Building is to utilize the digital broadband technology FTTB) to FTTB in the Optical Access Network technology, and optical fiber directly in the sub-district, arrives each user through twisted-pair feeder (ultra Category-5 twisted pair or 4 pairs of unshielded twisted pairs) again.Along with constantly popularizing and extension of FTTB network, the distance between optical network unit (ONU, Optical Network Unit) and optical line terminal (OLT, Optical Line Terminal) is more and more far away.For each optical line terminal; Its configuration scope is all different; For the Gigabit-capable Passive Optical Network system; The default configuration scope of optical line terminal is 0Km～20Km, and the maximum configured scope is 60Km, and the nearest optical network unit in terminal, distance light road and the distance between the optical network unit farthest of terminal, distance light road can not surpass 20Km.Optical line terminal can be to whole optical network units newly-increased in configuration scope registration of reaching the standard grade, if but exceed the configuration scope of optical line terminal, then can't search automatically and find the optical network unit that increases newly.Optical network unit can't normally be linked in the network, has just increased the use constraint to the user, has also limited the practical capacity of optical network unit simultaneously, brings great inconvenience with maintenance for the later stage expansion of operator.
Summary of the invention
The embodiment of the invention provides a kind of method and system of finding optical network unit, in order to find the newly-increased optical network unit outside the EPON configuration scope.
In order to solve above technical problem, the technical scheme that the embodiment of the invention is taked is:
A kind of method of finding optical network unit comprises:
Optical line terminal is to optical network unit broadcasting gate frame; If outside the time is windowed in registration, receive the up response of optical network unit, then judge to have newly-increased optical network unit;
The frame number of said optical line terminal adjustment halt frame, and press the frame number of adjusting back halt frame and broadcast the halt frame to optical network unit;
Said optical line terminal obtains the sequence number and the ranging information of newly-increased optical network unit.
A kind of system that finds optical network unit comprises:
Gate frame radio unit is used for the frame to optical network unit broadcasting gate;
Receiving element is used to receive the up response of optical network unit, if outside the time is windowed in registration, receive said up response, then judges to have newly-increased optical network unit;
Halt framing control unit is used for when said receiving element judges that existence increases optical network unit newly, and terminal, compute ray road is to the frame number of the halt frame of optical network unit transmission;
Halt frame transmitting element, the frame number of halt frame is to optical network unit broadcasting halt frame after the adjustment that is used for calculating by said halt framing control unit;
Acquiring unit is used to obtain sequence number and the ranging information that increases optical network unit newly.
The embodiment of the invention is found the method and system of optical network unit, just can find automatically that EPON disposes extraneous newly-increased optical network unit, and obtains the sequence number and the ranging information of newly-increased optical network unit.In addition; After the sequence number and ranging information that obtain newly-increased optical network unit; The embodiment of the invention also further provides a kind of technical scheme of adjusting EPON configuration scope, and optical line terminal just can be found and operation such as the registration of reaching the standard grade all or part of newly-increased optical-fiber network of discovery like this.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of schematic flow sheet that the embodiment of the invention is found the method for optical network unit;
Fig. 2 is the schematic flow sheet that obtains newly-increased optical network unit sequence number and ranging information in the embodiment of the invention;
Fig. 3 is the sketch map of EPON configuration scope in the embodiment of the invention;
Fig. 4 is a kind of structural representation that the embodiment of the invention is found the device of optical network unit;
Fig. 5 is a kind of structural representation of acquiring unit in the embodiment of the invention;
Fig. 6 is the structural representation of first kind of implementation of configuration scope adjustment unit in the embodiment of the invention;
Fig. 7 is the structural representation of second kind of implementation of configuration scope adjustment unit in the embodiment of the invention;
Fig. 8 is a kind of structural representation of embodiment of the invention passive optical network.
Embodiment
In order to make those skilled in the art person understand the scheme of the embodiment of the invention better, the embodiment of the invention is done further to specify below in conjunction with accompanying drawing and execution mode.
The embodiment of the invention is found the method and system of newly-increased optical network unit; Through the frame number of adjustment OLT to ONU downlink broadcast halt frame; Find the newly-increased optical network unit of passive optical network configuration scope outward, and obtain the sequence number and the ranging information of newly-increased optical network unit.
As shown in Figure 1, be the flow chart that the embodiment of the invention is found the method for newly-increased optical network unit, comprising:
OLT finds the ONU in the PON system through the mode of periodic broadcasting gate frame, and said gate frame is used for OLT and finds newly-increased ONU.
The ONU that does not have registration can wait for that a random time (communicating by letter with OLT simultaneously for fear of a plurality of ONU) sends up response to OLT after receiving gate message.For the ONU in PON system configuration scope, it can send up response to OLT in the time is windowed in registration.But for the extraneous ONU of configuration, its up response of returning then can drop on registered outside the time of windowing.Therefore; If OLT receives up response outside the time is windowed in registration; Then prove outside OLT default configuration scope, to have newly-increased ONU, for the GPON system, the default configuration scope of OLT is 0Km～20Km; If newly-increased ONU is arranged on beyond 0Km～20Km, then this ONU is the extraneous newly-increased ONU of configuration.
In this step; For fear of the erroneous detection phenomenon that causes owing to outside causes such as other light path interference; Can suitably increase the number of times of detection: behind many broadcasting of OLT gate frame,, then judge to have newly-increased ONU if repeatedly outside the time is windowed in registration, receive the up response of ONU.
Further, because newly-increased ONU is the extraneous ONU of OLT default configuration,, make OLT have time enough to receive the response that said newly-increased ONU returns so need adjustment to send the frame number of halt frame.
The method of embodiment of the invention calculating adjustment back halt frame frame number has multiple, for example can calculate the frame number of acquisition adjustment back halt frame through following formula: D/V*2+48 μ s+2 μ s≤125 μ s*N, wherein,
D is the greatest physical distance of optical line terminal and optical network unit in the EPON;
V is the transmission speed of light in optical fiber, is 200000km/s;
48 μ s are the random delay time of optical line terminal;
2 μ s are that optical line terminal is handled the difference delay time;
125 μ s are the time of a halt frame.
For example, for the GPON system, if the configuration scope of OLT is 0Km～60Km; Be D=60Km; Be 6 frames according to halt frame frame number after the adjustment of above-mentioned formula calculating acquisition then, perhaps said OLT maximum configured scope is 0Km～40Km, and then adjusting halt frame frame number is 4 frames.
Particularly; OLT sends the halt frame for the ONU (having accomplished and having reached the standard grade the ONU of registration and accomplish the newly-increased ONU that reaches the standard grade and register) of all operations state by the frame number of adjusting back halt frame; The ONU that makes all accomplish the registration of reaching the standard grade all stops uplink after receiving the halt frame, produce the quiescent operation zone.
After outside finding the configuration scope, having unregistered newly-increased ONU, if need obtain sequence number and the ranging information of this newly-increased ONU, then OLT will send request to ONU in the time corresponding of quiescent operation zone, obtains sequence number and the ranging information of newly-increased ONU.
If will successfully obtain sequence number and the ranging information of ONU; OLT will accomplish the request of transmission at least and receive the operational motion of ONU sequence number in the time corresponding of quiescent operation zone, so the length of corresponding time of quiescent operation zone with regard to determined OLT can with how far apart from outside ONU communicate.Therefore if want to obtain sequence number and the ranging information of the outer ONU of configuration scope; Then need adjust quiescent operation zone time corresponding; That is to say the frame number of adjustment OLT, specifically adjust the mode of the frame number of halt frame and discuss, repeat no more here in step 102 to the halt frame of ONU transmission.
If EPON is Gigabit-capable Passive Optical Network (GPON, Gigabit-Capable PON), then can obtain sequence number and the ranging information of newly-increased ONU according to flow process shown in Figure 2:
Step 201, OLT transmits Sequence Number to ONU, and (series number SN) asks.
Step 202, OLT receives the sequence number that newly-increased ONU returns.
Step 203, OLT is that each newly-increased ONU distributes an optical network unit mark (ONUID, Optical Network Unit Identifier).
Step 204, OLT sends distance measurement request to newly-increased ONU, and receives the ranging information that newly-increased ONU returns, the physical distance between promptly newly-increased ONU and the OLT.
In addition; Need to prove for fear of the signal of a plurality of ONU uplink and reach OLT simultaneously and cause the situation of upward signal conflict to take place; After the ranging information that obtains each newly-increased ONU; Be that also each ONU inserts a specific balanced time delay value, all ONU adjusted to the logical reach place identical with OLT carry out TDMA (Time Division Multiple Access, time division multiple access) again and solve above-mentioned conflict.
The embodiment of the invention is after finding the extraneous newly-increased ONU of PON system configuration; Mode through real-time adjustment halt frame frame number; Under the situation that does not influence online ONU, accomplish the discovery procedure of newly-increased ONU automatically, for operator provides convenience to the expansion and the maintenance of Optical Distribution Network.
Further; Method based on discovery optical network unit shown in Figure 1; Can also be behind the sequence number and ranging information that obtain newly-increased ONU; The configuration scope of adjustment PON system is just adjusted the configuration scope of OLT, and OLT just can carry out the newly-increased ONU in the adjusted configuration scope and find automatically and the further execution operations such as registration of reaching the standard grade like this.
Illustrate the method for above-mentioned automatic discovery optical network unit below in conjunction with Fig. 3.
As shown in Figure 3, it is that (with GPON is example to its configuration scope, and B-A≤20Km), if in A～B scope, there is newly-increased ONU, OLT can find this ONU automatically, and it is registered that OLT is provided with [A, B].This OLT can satisfy operations such as the registration of reaching the standard grade of all ONU in configuration scope A～B, and simultaneously, can also note in current all ONU that reach the standard grade; Distance from the nearest ONU of OLT is a; From the distance of OLT ONU farthest is b, if exist in A end points left side c1, c2 ..., cN amounts to the newly-increased ONU of N, then can find the newly-increased ONU in A end points left side according to the embodiment of the invention automatically; With c1 is example, and detailed process is following:
At first, OLT broadcasting gate frame, if outside the time is windowed in registration, receive the response of the ONU of c1 place, then OLT judges the ONU that existence is newly-increased, and this ONU is positioned at outside the configuration scope of OLT.
Particularly, behind OLT broadcasting gate frame, for the newly-increased ONU in the configuration scope; Can, registration return response in windowing the time to OLT, and for the ONU at c1 place, because it is positioned at outside the configuration scope of OLT; Then this ONU will drop on to the response that OLT returns and register outside the time of windowing; Therefore, if OLT receives the response of ONU outside the time is windowed in registration, then judge outside the configuration scope, to have newly-increased ONU.
Secondly; The frame number of OLT adjustment halt frame; And the frame number of pressing adjustment back halt frame is broadcasted the halt frame to ONU; Make the registered ONU receive the halt frame stop uplink, produce the quiescent operation zone, utilize this quiescent operation zone to operations such as the newly-increased ONU at the outer c1 place of configuration scope register by OLT.Method about adjustment halt frame frame number is discussed in step 102, repeats no more here.
At last, OLT obtains the sequence number and the ranging information of the newly-increased optical network unit in c1 place.Specifically comprise: (1) OLT is to the OUN request of transmitting Sequence Number; Said serial number request is the global command to all ONU; The newly-increased OUN that receives serial number request is back to OLT with the sequence number of self, and OLT has just got access to the sequence number of the newly-increased ONU in c1 place like this.(2) OLT is that each newly-increased ONU distributes an ONUID.(3) OLT sends distance measurement request to the ONUID of the newly-increased optical network unit in c1 place, be sent to OLT after obtaining ranging information by this ONU, and OLT has just got access to the ranging information that the c1 place increases ONU newly like this.
So far, OLT has accomplished the automatic discovery procedure to the newly-increased ONU in c1 place.
Further, after OLT accomplished above-mentioned automatic discovery procedure, the automatic configuration scope of adjustment EPON made OLT to find automatically the newly-increased ONU in the adjusted configuration scope and operation such as the registration of reaching the standard grade.The mode of concrete adjustment configuration scope can comprise following two kinds:
First kind of implementation as embodiment of the invention adjustment PON system configuration scope specifically comprises:
(1) in configuration scope [A, B], search a nearest registered ONU of distance A end points, and the position of writing down this registered ONU is primary importance a, wherein, A≤a＜B and a, A and B are natural number.
(2) in configuration scope [A, B], search a registered ONU nearest, and the position of writing down this registered ONU is second place b apart from the B end points, wherein, a＜b≤B, b are natural number.
(3) mean value of distance between calculating ONU that (being left side outside the former configuration scope) increases newly outside the A end points and a point, and be recorded as the 3rd position c.For example, outside former configuration scope the left side find c1, c2 ..., cN amounts to the newly-increased ONU of N, then c=[(a-c1)+(a-c2)+... + (a-cN)]/N, wherein, c≤A, c are natural number.
(4) calculate the mean value of distance between outside the B end points (being former configuration scope external right side) newly-increased ONU and the b point, and be recorded as the 4th position d.For example, former configuration scope external right side find d1, d2 ..., dM amounts to the newly-increased ONU of M, then d=[(d1-b)+(d2-b)+... + (dM-b)]/M, wherein, d >=B, d are natural number.
(5) behind definite good above-mentioned four location points, adjust the configuration scope through following condition:
If A-c＜B-b, promptly the distance of A end points to the three position c is less than the distance of B end points to second place b, and then with the move to left distance of (A-c) of configuration scope, adjustment back configuration scope is [c, B-(A-c)].
Because A-c＜B-b,, still can guarantee to be in the locational registered ONU of b point and be in the state that to communicate by letter with OLT all the time so the right endpoint B of former configuration scope [A, B] is moved to left after the distance of (A-c); Simultaneously, can also the newly-increased ONU in (A-c) scope be brought in the communication range of OLT, OLT just can send confirmation to the newly-increased ONU of this part, the newly-increased ONU of this part is accomplished registration activate.
If d-B＜a-A, promptly less than the distance of primary importance a to the A end points, then with the move to right distance of (d-B) of configuration scope, adjust the scope of configuration afterwards is [A+ (d-B), d] to the 4th position d to the distance of B end points.
Because d-B＜a-A,, still can guarantee to be in the locational registered ONU of a point and be in the state that to communicate by letter with OLT all the time so the left end point A of former configuration scope [A, B] is moved to right after the distance of (d-B); Simultaneously, can also the newly-increased ONU in (d-B) scope be brought in the communication range of OLT, OLT just can send confirmation to the newly-increased ONU of this part, the newly-increased ONU of this part is accomplished registration activate.
In addition, all satisfy, can't confirm the configuration scope when moving to left or move right, then can carry out to judge according to nearby principle (be about to the configuration scope and adjust to the nearest zone of the former configuration scope of distance) at A-c＜B-b and these two conditions of d-B＜a-A:
If a-c＜d-b, promptly the distance of primary importance a to the three position c is less than the distance of the 4th position d to second place b, and then with the move to left distance of (A-c) of configuration scope, adjustment back configuration scope is [c, B-(A-c)].
If a-c＞d-b, promptly the distance of primary importance a to the three position c is greater than the distance of the 4th position d to second place b, and then with the move to right distance of (d-B) of configuration scope, adjustment back configuration scope is [A+ (d-B), d].
The condition that the configuration scope need satisfy after the adjustment of PON system comprises: will guarantee that at first the registered ONU in the former configuration scope [A, B] is in the state that can communicate by letter with OLT all the time; And then in the newly-increased outward ONU communication range of bringing OLT into as much as possible of the scope that will dispose.For this reason, this implementation has adopted and has calculated newly-increased ONU and realize as much as possible newly-increased ONU is brought in the OLT communication range to the mode of the range averaging value of assigned address (the newly-increased ONU in left side disposes the scope external right side and increases ONU newly to the b point to a point configuration scope outside).
In addition, need to prove,, then dispose scope and also will satisfy B-A≤20Km if the EPON of the embodiment of the invention is GPON.Be example below with GPON, first kind of implementation adjusting the configuration scope be illustrated:
If the configuration scope [A of OLT; B] value be [20Km; 40Km], find the nearest ONU of distance A end points and be positioned at 25Km place (being primary importance a=25Km), the ONU nearest apart from the B end points is positioned at 30Km place (being second place b=30Km); Calculate the 3rd position c=15Km that obtains in A end points left side, calculate the 4th position d=45Km that obtains on B end points right side.At this moment, satisfy A-c＜B-b, i.e. (20-15)＜(40-30); The distance of (A-c)=5Km can move to left the configuration scope of OLT; Adjustment back configuration scope is [15Km, 35Km], and OLT just can find the ONU in 15Km～35Km scope and operation such as the registration of reaching the standard grade automatically.
Under newly-increased ONU situation pockety; It is far away to the distance of assigned address certain or some newly-increased ONU to occur; Thereby influence choosing of the 3rd position c and/or the 4th position d, the configuration scope of adjusting through the nearby principle of first kind of implementation so just deviation may occur.For this reason, the embodiment of the invention also provides second kind of implementation of following adjustment PON system configuration scope, specifically comprises:
(1) in configuration scope [A, B], search a nearest registered ONU of distance A end points, and the position of writing down this registered ONU is the 5th position e, wherein, A≤e＜B and e, A and B are natural number.
(2) in configuration scope [A, B], search a registered ONU nearest, and the position of writing down this registered ONU is the 6th position f apart from the B end points, wherein, e＜f≤B, f are natural number.
(3) (being left side outside the former configuration scope) confirmed the 7th position g outside the A end points, makes f-g≤m1, and wherein, m1 is first preset value.
(4) (being former configuration scope external right side) confirmed to make h-e≤m2 by 8 positions h outside the B end points, and wherein, m2 is second preset value.
(5) confirm good above-mentioned four location points after, adjust the configuration scope through following condition: judge that the newly-increased ONU number that comprises in [g, f] scope is whether greater than the newly-increased ONU number that comprises in [e, h] scope: if greater than, then new configuration scope is [g, f]; Otherwise new configuration scope is [e, h].
This implementation equally also is in order to satisfy the requirement of PON system adjustment back configuration scope, in guaranteeing former configuration scope under the situation of registered ONU and OLT proper communication, and will increase newly in the communication range that ONU also brings OLT into as much as possible.
It is to moving to left or moving right that this implementation decides the configuration scope through the number that directly relatively disposes outer left side of scope and the newly-increased ONU in right side; With respect to first kind of implementation of adjustment configuration scope, just can effectively avoid the configuration scope adjustment deviation that causes because of newly-increased ONU skewness.
In addition, need to prove, if EPON is GPON, the first preset value m1=20Km then, the second preset value m2=20Km.
Correspondingly, the embodiment of the invention also provides a kind of device of finding optical network unit, and said device is the optical line terminal in the passive optical network just.Referring to Fig. 4, be a kind of structural representation of this device.
In this embodiment, said device 400 comprises:
Gate frame radio unit 401 is used for the frame to optical network unit broadcasting gate.
Receiving element 402 is used to receive the up response of optical network unit, if outside the time is windowed in registration, receive up response, then judges to have newly-increased optical network unit.
Halt framing control unit 403 is used for when receiving element judges that existence increases optical network unit newly, and terminal, compute ray road is to the frame number of the halt frame of optical network unit transmission.
Halt frame transmitting element 404, the frame number of halt frame is to optical network unit broadcasting halt frame after the adjustment that is used for calculating by halt framing control unit.
Acquiring unit 405 is used to obtain sequence number and the ranging information that increases optical network unit newly.
Further, as shown in Figure 5, acquiring unit comprises:
Serial number request transmitting element 501 is used for to the optical network unit request of transmitting Sequence Number.
Sequence number receiving element 502 is used in request transmitting unit after optical network unit sends request, receiving the sequence number that newly-increased optical network unit returns.
Optical network unit mark allocation units 503 are used for behind the sequence number that obtains newly-increased optical network unit, for each newly-increased optical network unit distributes optical network unit mark, i.e. an ONUID.
Ranging information acquiring unit 504 is used for sending distance measurement request to newly-increased optical network unit, and receives the ranging information that newly-increased optical network unit returns.
Obtain the sequence number and ranging information of newly-increased ONU at acquiring unit after, can also adjust the configuration scope of PON system, OLT can also be to adjusting newly-increased ONU in the scope of the configuration afterwards registration of reaching the standard grade like this.Correspondingly, as shown in Figure 4, the device of the discovery optical network unit of the embodiment of the invention also can comprise:
Configuration scope adjustment unit 406; Be used for after acquiring unit obtains the sequence number and ranging information of newly-increased optical network unit; The configuration scope of adjustment EPON is so that OLT is to adjusting newly-increased ONU in the configuration scope of back and find automatically and operation such as the registration of reaching the standard grade.
Further, referring to Fig. 6, first kind of implementation as configuration scope adjustment unit can specifically comprise:
Primary importance is confirmed unit 601, be used in configuration scope [A, B], searching a nearest registered ONU of distance A end points, and the position of writing down this registered ONU is primary importance a that wherein, A≤a＜B and a, A and B are natural number.
The second place is confirmed unit 602, be used in configuration scope [A, B], searching a registered ONU nearest apart from the B end points, and the position of writing down this registered ONU is second place b that wherein, a＜b≤B, b are natural number.
The 3rd position determination unit 603 is used to calculate the mean value of distance between ONU newly-increased outside the A end points and a point, and is recorded as the 3rd position c, and wherein, c≤A, c are natural number.
The 4th position determination unit 604 is used to calculate the mean value of distance between ONU newly-increased outside the B end points and the b point, and is recorded as the 4th position d, and wherein, d >=B, d are natural number.
The first adjustment subelement 605 is used for the configuration scope according to following condition adjustment EPON:
If A-c＜B-b, then with the move to left distance of (A-c) of configuration scope, adjustment back configuration scope is [c, B-(A-c)];
If d-B＜a-A, then with the move to right distance of (d-B) of configuration scope, adjustment back configuration scope is [A+ (d-B), d].
Further; As shown in Figure 6; Configuration scope adjustment unit also comprises the second adjustment subelement 606; Be used for when A-c＜B-b and these two conditions of d-B＜a-A all satisfy, the configuration scope (be about to the configuration scope and adjust to the nearest zone of the former configuration scope of distance) according to nearby principle adjustment EPON specifically comprises:
If a-c＜d-b, then with the move to left distance of (A-c) of configuration scope, adjustment back configuration scope is [c, B-(A-c)];
If a-c＞d-b, then with the move to right distance of (d-B) of configuration scope, adjustment back configuration scope is [A+ (d-B), d].
The scope of finally confirming through configuration scope adjustment unit need satisfy: can communicate with the registered ONU in the former configuration scope; Also can communicate, newly-increased ONU is registered activation with newly-increased ONU as much as possible.
Need to prove here,, then dispose scope and also need satisfy B-A≤20Km if EPON is GPON.
Further, as shown in Figure 7, second kind of implementation as configuration scope adjustment unit can specifically comprise:
The 5th position determination unit 701 is used in configuration scope [A, B], searching a nearest registered ONU of distance A end points, and the position of writing down this registered ONU is the 5th position e, and wherein, A≤e＜B and e, A and B are natural number.
The 6th position determination unit 702 is used in configuration scope [A, B], searching a registered ONU nearest apart from the B end points, and the position of writing down this registered ONU is the 6th position f, and wherein, e＜f≤B, f are natural number.
The 7th position determination unit 703 is used for outside the A end points, confirming one the 7th position g that make (f-g)≤m1, wherein, m1 is first preset value.
8 positions is confirmed unit 704, is used for outside the B end points, confirming a 8 positions h, makes (h-e)≤m2, and wherein, m2 is second preset value.
The 3rd adjustment subelement 705 is used for the configuration scope according to following condition adjustment EPON:
If the newly-increased ONU number that comprises in [g, f] scope is greater than the newly-increased ONU number that comprises in [e, h] scope, then adjustment back configuration scope is [g, f]; Otherwise adjustment back configuration scope is [e, h].
Further, if EPON is GPON, the first preset value m1=20Km then, the second preset value m2=20Km.Thereby guarantee that adjustment back configuration scope is no more than 20Km.
Correspondingly, the embodiment of the invention also provides a kind of passive optical network, and is as shown in Figure 8, is a kind of structural representation of passive optical network.
In this embodiment, passive optical network comprises:
Further, the optical line terminal in the embodiment of the invention passive optical network also is used to adjust the configuration scope of EPON, so that OLT is to adjusting newly-increased ONU in the back configuration scope and find automatically and operation such as the registration of reaching the standard grade.
Need to prove that here it mainly acts on the Optical Distribution Network among Fig. 8 (ODN, optical distribution network) to providing optical transmission logical between OLT and the ONU.In addition, the concrete formation about optical line terminal in the embodiment of the invention passive optical network can repeat no more referring to Fig. 4 here.
Description through above execution mode can know, all or part of step that those skilled in the art can be well understood in the foregoing description method can realize by the mode that software adds essential general hardware platform.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product; This computer software product can be stored in the storage medium, like ROM/RAM, magnetic disc, CD etc., comprises that some instructions are with so that a computer equipment (can be a personal computer; Server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
Need to prove that each embodiment in this specification all adopts the mode of going forward one by one to describe, identical similar part is mutually referring to getting final product between each embodiment, and each embodiment stresses all is the difference with other embodiment.Especially, for equipment and system embodiment, because it is basically similar in appearance to method embodiment, so describe fairly simplely, relevant part gets final product referring to the part explanation of method embodiment.Equipment described above and system embodiment only are schematic; Wherein the unit as the separating component explanation can or can not be physically to separate also; The parts that show as the unit can be or can not be physical locations also; Promptly can be positioned at a place, perhaps also can be distributed on a plurality of NEs.Can realize the purpose of present embodiment scheme according to the needs selection some or all of module wherein of reality.Those of ordinary skills promptly can understand and implement under the situation of not paying creative work.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All any modifications of within spirit of the present invention and principle, being done, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (13)
1. a method of finding optical network unit is characterized in that, comprising:
Optical line terminal is to optical network unit broadcasting gate frame; If outside the time is windowed in registration, receive the up response of optical network unit, then judge to have newly-increased optical network unit;
The frame number of said optical line terminal adjustment halt frame, and press the frame number of adjusting back halt frame and broadcast the halt frame to optical network unit;
Said optical line terminal obtains the sequence number and the ranging information of newly-increased optical network unit.
2. method according to claim 1 is characterized in that, the frame number of said optical line terminal adjustment halt frame specifically comprises:
Said optical line terminal calculates the frame number N that adjusts the halt frame according to D/V*2+48 μ s+2 μ s≤125 μ s*N, wherein,
N is the frame number of adjustment halt frame;
D is the greatest physical distance of optical line terminal and optical network unit in the EPON;
V is the transmission speed of light in optical fiber;
48 μ s are the random delay time of optical line terminal;
2 μ s are that optical line terminal is handled the difference delay time;
125 μ s are the time of a halt frame.
3. method according to claim 1 and 2 is characterized in that, said method also comprises:
Said obtain the sequence number and ranging information of newly-increased optical network unit after, adjust the configuration scope of EPON.
4. method according to claim 3 is characterized in that,
The configuration scope of said adjustment EPON comprises:
In configuration scope [A, B], search the nearest optical network unit of distance A end points, and the position of writing down this optical network unit is primary importance a, wherein, A≤a＜B and a, A and B are natural number;
In configuration scope [A, B], search the optical network unit nearest, and the position of writing down this optical network unit is second place b apart from the B end points, wherein, a＜b≤B, b are natural number;
The mean value of distance between optical network unit that calculating increases newly outside the A end points and a point, and be recorded as the 3rd position c, wherein, c≤A, c are natural number;
The mean value of distance between optical network unit that calculating increases newly outside the B end points and the b point, and be recorded as the 4th position d, wherein, d >=B, d are natural number;
If A-c＜B-b, then with the move to left distance of A-c of said configuration scope, the configuration scope is [c, B-(A-c)] after the said adjustment;
If d-B＜a-A, then with the move to right distance of d-B of said configuration scope, the configuration scope is [A+ (d-B), d] after the said adjustment.
5. method according to claim 4 is characterized in that, said method also comprises:
If A-c＜B-b, and d-B＜a-A then carry out to judge:
If a-c＜d-b, then with the move to left distance of A-c of said configuration scope, the configuration scope is [c, B-(A-c)] after the said adjustment;
If a-c＞d-b, then with the move to right distance of d-B of said configuration scope, the configuration scope is [A+ (d-B), d] after the said adjustment.
6. method according to claim 3 is characterized in that,
The configuration scope of said adjustment EPON comprises:
In configuration scope [A, B], search the nearest optical network unit of distance A end points, and the position of writing down this optical network unit is the 5th position e, wherein, A≤e＜B and e, A and B are natural number;
In configuration scope [A, B], search the optical network unit nearest, and the position of writing down this optical network unit is the 6th position f apart from the B end points, wherein, e＜f≤B, f are natural number;
Outside the A end points, confirm the 7th position g, make f-g≤m1, wherein, m1 is first preset value;
Outside the B end points, confirm 8 positions h, make h-e≤m2, wherein, m2 is second preset value;
Judge that the optical network unit number that comprises in [g, f] scope is whether greater than the optical network unit number that comprises in [e, h] scope: if greater than, then said new configuration scope is [g, f]; Otherwise said new configuration scope is [e, h].
7. a device of finding optical network unit is characterized in that, this device comprises:
Gate frame radio unit is used for the frame to optical network unit broadcasting gate;
Receiving element is used to receive the up response of optical network unit, if outside the time is windowed in registration, receive said up response, then judges to have newly-increased optical network unit;
Halt framing control unit is used for when said receiving element judges that existence increases optical network unit newly, and terminal, compute ray road is to the frame number of the halt frame of optical network unit transmission;
Halt frame transmitting element, the frame number of halt frame is to optical network unit broadcasting halt frame after the adjustment that is used for calculating by said halt framing control unit;
Acquiring unit is used to obtain sequence number and the ranging information that increases optical network unit newly.
8. device according to claim 7 is characterized in that, said device also comprises:
Configuration scope adjustment unit is used for after said acquiring unit obtains the sequence number and ranging information of newly-increased optical network unit, the configuration scope of adjustment EPON.
9. device according to claim 8 is characterized in that, said configuration scope adjustment unit specifically comprises:
Primary importance is confirmed the unit, be used in configuration scope [A, B], searching the nearest optical network unit of distance A end points, and the position of writing down this NE is primary importance a that wherein, A≤a＜B and a, A and B are natural number;
The second place is confirmed the unit, be used in configuration scope [A, B], searching the optical network unit nearest apart from the B end points, and the position of writing down this NE is second place b that wherein, a＜b≤B, b are natural number;
The 3rd position determination unit is used to calculate the mean value of distance between optical network unit newly-increased outside the A end points and a point, and is recorded as the 3rd position c, and wherein, c≤A, c are natural number;
The 4th position determination unit is used to calculate the mean value of distance between optical network unit newly-increased outside the B end points and the b point, and is recorded as the 4th position d, and wherein, d >=B, d are natural number;
The first adjustment subelement is used for the configuration scope according to following condition adjustment EPON, comprising:
If A-c＜B-b, then with the move to left distance of A-c of said configuration scope, the configuration scope is [c, B-(A-c)] after the said adjustment;
If d-B＜a-A, then with the move to right distance of d-B of said configuration scope, the configuration scope is [A+ (d-B), d] after the said adjustment.
10. the system of the newly-increased optical network unit of discovery according to claim 9 is characterized in that said configuration scope adjustment unit also comprises:
The second adjustment subelement is used for when A-c＜B-b and d-B＜a-A, according to the configuration scope of following condition adjustment EPON:
If a-c＜d-b, then with the move to left distance of A-c of said configuration scope, the configuration scope is [c, B-(A-c)] after the said adjustment;
If a-c＞d-b, then with the move to right distance of d-B of said configuration scope, the configuration scope is [A+ (d-B), d] after the said adjustment.
11. device according to claim 8 is characterized in that, said configuration scope adjustment unit specifically comprises:
The 5th position determination unit is used in configuration scope [A, B], searching the nearest optical network unit of distance A end points, and the position of writing down this NE is the 5th position e, and wherein, A≤e＜B and e, A and B are natural number;
The 6th position determination unit is used in configuration scope [A, B], searching the optical network unit nearest apart from the B end points, and the position of writing down this NE is the 6th position f, and wherein, e＜f≤B, f are natural number;
The 7th position determination unit is used for outside the A end points, confirming one the 7th position g that make (f-g)≤m1, wherein, m1 is first preset value;
8 positions is confirmed the unit, is used for outside the B end points, confirming a 8 positions h, makes (h-e)≤m2, and wherein, m2 is second preset value;
The 3rd adjusts subelement, is used to adjust the configuration scope of EPON, specifically comprises:
If the optical network unit number that comprises in [g, f] scope is greater than the optical network unit number that comprises in [e, h] scope, then said adjustment back configuration scope is [g, f]; Otherwise said adjustment back configuration scope is [e, h].
12. a passive optical network is characterized in that, said system comprises:
Optical line terminal; Be used for frame,, then judge to have newly-increased optical network unit if outside the time is windowed in registration, receive the up response of optical network unit to optical network unit broadcasting gate; And the frame number of adjustment halt frame, broadcast the halt frame by the frame number of adjustment back halt frame to optical network unit; Said optical line terminal also is used to obtain the sequence number and the ranging information of newly-increased optical network unit;
Optical network unit is used to receive the gate frame of said optical line terminal, and returns up response to said optical network unit; Said optical network unit also is used to receive the halt frame of said optical line terminal according to the frame number transmission of adjustment back halt frame, and returns sequence number and ranging information to said optical line terminal.
13. system according to claim 12 is characterized in that,
Said optical line terminal also is used to adjust the configuration scope of passive optical network.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/083116 WO2012167577A1 (en) | 2011-11-29 | 2011-11-29 | Method and system for discovering optical network unit |
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| CN102511133B CN102511133B (en) | 2014-03-12 |
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| WO (1) | WO2012167577A1 (en) |
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| CN109104646A (en) * | 2017-06-21 | 2018-12-28 | 中兴通讯股份有限公司 | A kind of optical network unit (ONU) registration method and device |
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| CN101854563A (en) * | 2009-03-31 | 2010-10-06 | 普然通讯技术(上海)有限公司 | Processing method of discovery process in EPON (Ethernet Passive Optical Network) |
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| CN109104646A (en) * | 2017-06-21 | 2018-12-28 | 中兴通讯股份有限公司 | A kind of optical network unit (ONU) registration method and device |
| CN113993011A (en) * | 2021-10-28 | 2022-01-28 | 中国电信股份有限公司 | Network unit online method, system, equipment and storage medium of passive optical network |
| CN113993011B (en) * | 2021-10-28 | 2024-03-19 | 中国电信股份有限公司 | Network element online method, system, equipment and storage medium of passive optical network |
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| CN102511133B (en) | 2014-03-12 |
| WO2012167577A1 (en) | 2012-12-13 |
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