CN102387426A - Uplink bandwidth allocating method of passive optical network - Google Patents
Uplink bandwidth allocating method of passive optical network Download PDFInfo
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Abstract
The invention relates to an uplink bandwidth allocating method of a passive optical network and a passive optical network system. An optical line terminal (OLT) in the passive optical network (PON) is capable of being connected with different optical network units (ONU) with different uplink rates. The method comprises the following steps that: the ONU transmits an uplink rate of the ONU or associated information of the uplink rate to the OLT according to a request of the OLT; and the OLT allocates an uplink bandwidth to the ONU according to the uplink rate or the uplink rate corresponding to the uplink rate associated information. Due to the adoption of the uplink bandwidth allocating method in the passive optical network and the passive optical network system, the uplink bandwidth utilization rate is improved.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the uplink bandwidth allocation method in a kind of EPON.
Background technology
Gigabit passive optical network (Gigabit-Capable Passive Optical Network; Abbreviating GPON as) technology is important techniques branch in EPON (PON) family; With other PON technology type seemingly, GPON also is a kind of passive light access technology that adopts some the multidrop topology structure.
The topological structure of GPON system is as shown in Figure 1; GPON is by optical line terminal (the Optical Line Terminal of office's side; Abbreviate OLT as), optical network unit (the Optical Network Unit of user side; Abbreviate ONU as) and Optical Distribution Network (Optical Distributio Network abbreviates ODN as) composition, the network configuration of point adopted usually to multiple spot.ODN is made up of Passive Optical Components such as monomode fiber, optical splitter, optical connectors, for the physical connection between OLT and the ONU provides light-transmitting medium.
Along with the development of Internet technology, the increasing demand of big bandwidth is increased, the PON technology of future generation that is basis with the GPON technology develops rapidly, and wherein the XG-PON technology PON of future generation that generally is considered to possibly to adopt in the future is technological.The downstream rate of XG-PON1 technology is 10Gbit/s, and upstream rate is 2.5Gbit/s, and this can satisfy the demand of resident to bandwidth.The transfer of data of XG-PON system descending direction (by OLT to ONU) adopts broadcast mode, and each ONU receives all frames respectively, obtains one's own frame according to ONU-ID, GEM-Port ID, Allocation-ID again.Transfer of data for up direction (from ONU to OLT); Because each ONU need share transmission medium; ONU adopts time-multiplexed mode to issue in the control of OLT and serves line data, and each ONU is transmit ascending data OLT distributes to oneself time slot through bandwidth mapping territory (BWmap) in.The structure of BWmap is as shown in Figure 2; The BWmap territory is made up of N distribution structure (Allocation Structure); Each distribution structure is by Alloc-ID territory (Allocation Identifier; The allocated bandwidth sign; Generally be T-CONT (Transmission Container; Transmission container) sign), (option of allocated bandwidth, 2 bits, bit are used to indicate whether whether ONU sends up dynamic bandwidth report (DBRu) in the Flags territory; The another one bit is used to indicate ONU whether to send upstream physical layer Operations, Administration and Maintenance (PLOAMu) message), the time started (Start Time, the position of first byte in the uplink frame of 125us of the Transmission Convergence burst (XGTC burst) of the XG-PON that expression ONU sends), authorize size (Grant Size), the indication (FWI) of forcing to revive, burst overhead parameter (Bprofile) and hybrid error correction (HEC) composition.
When ONU receives an Allocation structure; If ONU judges that according to Alloc-ID this Allocation structure distributes to oneself; Then ONU carries out the HEC verification to the data among the Allocation structure that receives; If check results is correct; ONU will begin to send the data among the T-CONT that allocated bandwidth is designated Alloc-ID constantly at the StartTime of Allocation structure indication, and the data length of transmission is the data length that ONU that Context resolution that ONU carries according to Grant size territory goes out can send.
In the prior art, passive optical network only can insert the ONU of a kind of upstream rate (like 2.5Gbit/s), but along with the appearance of diversified demand; As, the business user needs bigger upstream bandwidth, has proposed the demand of the upstream rate of 5Gbit/s; Passive optical network needs to insert simultaneously the ONU of two or more speed; In this case, how OLT carries out upstream bandwidth distribution, and raising upstream bandwidth utilance is one has problem to be solved.
Summary of the invention
The technical problem that the present invention will solve provides uplink bandwidth allocation method and the passive optical network in a kind of EPON, to improve the upstream bandwidth utilance.
For solving above technical problem, the invention provides the uplink bandwidth allocation method in a kind of EPON, this method comprises:
Said ONU is according to the request of said OLT or initiatively its upstream rate or upstream rate relevant information are sent to said OLT;
Said OLT is that said ONU carries out upstream bandwidth distribution according to said upstream rate or the corresponding upstream rate of upstream rate relevant information.
Further, said upstream rate relevant information is logical message, sequence number information, log-on message or the demarcation information that has preset corresponding relation with said upstream rate.
Further, the said ONU mode of sending upstream rate or upstream rate relevant information comprises: utilize newly-built being used to transmit the PLOAM message of ONU upstream rate, utilize existing PLOAM message special domain, utilize the ONU management control interface information or utilize the specific bit position in the indication territory of uplink frame.
Further, said existing PLOAM message refers to ONU serial number message or registration message.
Further; The parameter that said OLT adopts when distributing upstream bandwidth for the ONU of different upstream rates comprises the time started and authorizes size; And the granularity of parameter is identical; Said OLT circulates successively and is that each ONU distributes bandwidth, comprises time started according to current ONU, authorizes the time started that size and upstream rate thereof obtain next ONU.
The parameter that adopts when further, said OLT distributes upstream bandwidth for the ONU of different upstream rates comprises the time started and authorizes size; The granularity of the time started of the ONU of different upstream rates is identical; Its granularity of authorizing size is directly proportional with upstream rate; Said OLT is followed successively by each ONU and distributes bandwidth, comprises time started according to current ONU, authorizes the time started that size and basic upstream rate obtain next ONU.
Further, said parameter granularity is given said ONU by said OLT notice in registration activation, or is the default value of systemic presupposition.
For solving above technical problem, the present invention also provides a kind of passive optical network, and said passive optical network comprises:
Said ONU is used for according to the request or the active of optical line terminal (OLT) its upstream rate or upstream rate relevant information being sent to said OLT;
Said OLT connects the ONU of identical or different upstream rate, and being used for according to said upstream rate or the corresponding upstream rate of upstream rate relevant information is that said ONU carries out upstream bandwidth distribution.
Further, said upstream rate relevant information is logical message, sequence number information, log-on message or the demarcation information that has preset corresponding relation with said upstream rate.
Further, the said ONU mode of sending upstream rate or upstream rate relevant information comprises: utilize newly-built being used to transmit the PLOAM message of ONU upstream rate, utilize existing PLOAM message special domain, utilize the ONU management control interface information or utilize the specific bit position in the indication territory of uplink frame.
Further; The parameter that said OLT adopts when distributing upstream bandwidth for the ONU of different upstream rates comprises the time started and authorizes size; And the granularity of parameter is identical; Said OLT circulates successively and is that each ONU distributes bandwidth, comprises time started according to current ONU, authorizes the time started that size and upstream rate thereof obtain next ONU.
The parameter that adopts when further, said OLT distributes upstream bandwidth for the ONU of different upstream rates comprises the time started and authorizes size; The granularity of the time started of the ONU of different upstream rates is identical; Its granularity of authorizing size is directly proportional with upstream rate; Said OLT is followed successively by each ONU and distributes bandwidth, comprises time started according to current ONU, authorizes the time started that size and basic upstream rate obtain next ONU.
Further, said parameter granularity is given said ONU by said OLT notice in registration activation, or is the default value of systemic presupposition.
In the uplink bandwidth allocation method and passive optical network in the EPON of the present invention; According to the request of said OLT or initiatively its upstream rate or upstream rate relevant information are sent to said OLT, OLT carries out upstream bandwidth distribution according to upstream rate or the corresponding upstream rate of upstream rate relevant information that ONU reports for this ONU by ONU.
Description of drawings
Fig. 1 is the topological structure sketch map of GPON system;
Fig. 2 is the structural representation of GPON downlink frame;
Fig. 3 is the sketch map of the uplink bandwidth allocation method in the EPON of the present invention.
Embodiment
When the different fiber branch road of the downstream rate OLT that is 10Gbit/s through ODN connected upstream rate respectively and be the ONU of 2.5Gbit/s and 5Gbit/s, the ONU of two kinds of speed adopted time-multiplexed mode to share the uplink medium.OLT sends upstream data through each ONU of BWmap order at specific ascending time slot; The light-detecting device root of OLT can be accomplished the detection of the uplink optical signal of two kinds of speed ONU transmissions; And convert the light signal of surveying into the signal of telecommunication; After light signal converted the signal of telecommunication into, OLT was the processing of circuit that the signal of 2.5Gbit/s is delivered to 2.5Gbit/s according to the corresponding upstream rate of different ascending time slots with upstream rate, was the processing of circuit that the signal of 5Gbit/s is delivered to 5Gbit/s with upstream rate.Through said method, OLT has the ability of the ONU that connects different upstream rates simultaneously.When OLT adopts above-mentioned BWmap to distribute upstream bandwidth for each ONU; Start time among the BWmap representes the position of first byte in the uplink frame of 125us of the Transmission Convergence burst (XGTC burst) of the XG-PON that ONU sends; Grant size representes the data length that ONU sends; For identical Grant size; The time that the ONU of 5Gbit/s upstream rate sends the corresponding data of said Grant size is that the ONU of 2.5Gbit/s upstream rate sends 1/2nd of the said Grant size corresponding data time; Therefore OLT is that in order to improve uplink efficient, OLT need know the upstream rate of each ONU when two kinds perhaps the ONU of two or more upstream rates distributed upstream bandwidth; After the upstream rate of having confirmed ONU; OLT can calculate the time that this ONU accomplishes the upstream data transmission in this uplink frame according to the upstream rate of the Start time, Grant size and this ONU that distribute for this ONU, thereby OLT can calculate the time Starttime that next ONU begins to send upstream data.
Therefore, under the prerequisite that improves uplink efficient, when OLT connected the ONU of two kinds and two or more upstream rates down, OLT need obtain to carry out allocated bandwidth for each ONU after the upstream rate of each ONU.
The main thought of uplink bandwidth allocation method in the EPON of the present invention and passive optical network is; According to the request of said OLT or initiatively its upstream rate or upstream rate relevant information are sent to said OLT, OLT carries out upstream bandwidth distribution according to upstream rate or the corresponding upstream rate of upstream rate relevant information that ONU reports for this ONU by ONU.
When the OLT of EPON had the ability of the ONU that connects different rates simultaneously, the speed of the ONU that it connected maybe be identical or different, as shown in Figure 3, and the uplink bandwidth allocation method in the EPON of the present invention comprises:
Step 301:ONU is according to the request of said OLT or initiatively its upstream rate or upstream rate relevant information are sent to said OLT;
Said upstream rate relevant information is logical message, sequence number information, log-on message or the demarcation information that has preset corresponding relation with said upstream rate.
Step 302: said OLT is that said ONU carries out upstream bandwidth distribution according to said upstream rate or the corresponding upstream rate of upstream rate relevant information.
The mode that said ONU sends upstream rate or upstream rate relevant information comprises: utilize newly-built being used to transmit the PLOAM message of ONU upstream rate, utilize existing PLOAM message special domain, utilize OMCI message or utilize the specific bit position in the indication territory of uplink frame.Said existing PLOAM message can be ONU serial number message or sign-on ID message.See the subsequent implementation example for details.
The parameter that said OLT adopts when distributing upstream bandwidth for the ONU of different upstream rates comprises the time started and authorizes size that the granularity of parameter can be identical or different.
The granularity homogeneous phase of parameter simultaneously, it is that each ONU distributes bandwidth that said OLT circulates successively, comprises time started according to current ONU, authorizes the time started that size and upstream rate thereof obtain next ONU.Identical situation comprises that demonstration is identical identical with implicit expression.
The different implementation of parameter granularity as: the granularity of the time started of the ONU of different upstream rates is identical, and its granularity of authorizing size is directly proportional with upstream rate, and the time started of the ONU of basic upstream rate is identical or different with the granularity of authorizing size.After introducing the parameter granularity, OLT is followed successively by each ONU and distributes bandwidth, according to time started of current ONU, authorize the time started that size and basic upstream rate obtain next ONU.
As: the ONU that inserts 2.5Gbit/s, 5Gbit/s, three kinds of speed of 10Gbit/s; If the ONU of 5Gbit/s is basic upstream rate; Its time started all is 4 with the granularity of authorizing size; Then the size granularity of authorizing of the ONU of 2.5Gbit/s is 2, and the granularity of authorizing size of the ONU of 10Gbit/s is 8.
Giving the granularity of authorizing size in the distribution structure that the minimum ONU of speed distributes upstream bandwidth like: OLT is constant C, and OLT is that to distribute the granularity of authorizing size in the distribution structure of upstream bandwidth be constant n * C to minimum speed limit n ONU doubly to speed;
After the ONU that speed is minimum receives that OLT distributes to the distribution structure of oneself; According to the time started in the distribution structure, authorize size and granularity C confirms that OLT distributes to the position of upstream bandwidth in uplink frame of oneself; Speed is after minimum speed limit n ONU doubly receives that OLT distributes to the distribution structure of oneself, according to the time started in the distribution structure, authorize size and granularity n * C confirms that OLT distributes to the position of upstream bandwidth in uplink frame of oneself.
Understandably, ONU has identical time started granularity with OLT, and the identical size granularity of authorizing.Said parameter granularity can be given said ONU by said OLT notice in registration activation, or is the default value of systemic presupposition.
Upstream bandwidth distribution involved in the present invention is only applicable to the allocated bandwidth of the upstream data relevant with the upstream rate of current ONU.
Embodiment one
Downstream rate is the ONU that the OLT of 10Gbit/s connects two kinds of upstream rates down; Being respectively ONU1 and the upstream rate that upstream rate is 2.5Gbit/s is the ONU2 of 5Gbit/s; It is that to distribute the granularity of the value of Start time and Grant Size in the distribution structure of upstream bandwidth be 4 for the ONU1 of 2.5Gbit/s to upstream rate that system default is provided with OLT; To upstream rate be the ONU2 of 5Gbit/s to distribute the granularity of the value of Start time in the distribution structure of upstream bandwidth be 4, the granularity of the value of Grant Size is 8.Here; The granularity of the value of the Grant Size of ONU2 being made as 8 reason is; Upstream rate with ONU1 is basic upstream rate, and the speed multiple of ONU2 and ONU1 relation is embodied on the granularity of Grant Size, and promptly the granularity of Grant Size is directly proportional with corresponding upstream rate.
OLT is that the ONU of two kinds of speed distributes the key step of upstream bandwidth following respectively:
Step 401:OLT is that (ONU has various states for serial-number-state in the unregistered state of activation; Serial-number-state is a kind of state wherein) ONU divide the shared bandwidth that is used in the message that transmits Sequence Number; The x of the value of the Start time of the distribution structure that said shared bandwidth is corresponding, the value of Grant size is y;
The serial number message bandwidth of here distributing is to distribute to the common upstream bandwidth of two kinds of speed ONU, i.e. the ONU that the registration of two kinds of speed activates can utilize this bandwidth to send upstream data.This bandwidth is distributed according to the demand of the ONU of low rate, has been equivalent to obtain exceed the bandwidth of actual needs when the ONU of two-forty resolves like this.Because ONU place system default has been described in the front granularity of Grantsize is so the Grantsize of ONU1 and ONU2 is different.
Step 402: after the ONU that is in serial-number-state receives the above-mentioned bandwidth that is used to the information of transmitting Sequence Number; Obtain the bandwidth of the information of transmitting Sequence Number according to the granularity of the Start time of the value of Start time and Grant size and system default and Grant size; Be that upstream rate is the ONU1 of 2.5Gbit/s obtains the information of transmitting Sequence Number according to the granularity 4 of Start time and Grant size a bandwidth; Upstream rate is the ONU2 of 5Gbit/s obtains the information of transmitting Sequence Number according to the granularity 4 and 8 of Start time and Grant size a bandwidth; ONU gives OLT according to the serial number message that the bandwidth of the information that transmits Sequence Number that parses is sent self, and ONU reports OLT with the region filling (Padding) that self upstream rate writes on sequence number information simultaneously;
Step 403:OLT receives the serial number message that ONU sends in step 2 after; Obtain sequence number information and the upstream rate information of this ONU; OLT distributes upstream bandwidth according to said upstream rate information for this ONU; When distributing the byte number of transmit ascending data to be z for certain ONU, if the upstream rate of this ONU is 2.5Gbit/s, then the value for the Grant size in the distribution structure of this ONU distribution is z/4; If the upstream rate of this ONU is 5Gbit/s; The value of Grant size in the distribution structure of then distributing for this ONU is z/8, and OLT is that the value of the Start time in the distribution structure of the upstream bandwidth that distributes of the ONU of two kinds of speed all is to be that the value of granularity 4 of the ONU of 2.5Gbit/s is distributed according to upstream rate, and the span of Start time is 0 to 9719;
That is, OLT according to time started of current ONU, authorize the time started that size and basic upstream rate obtain next ONU.
Step 404: upstream rate is the ONU1 of 2.5Gbit/s receives the distribution structure that OLT sends in step 3 after; Resolve OLT according to granularity 4 and distribute to Start time and Grant size value in oneself the distribution structure; Obtain the position of upstream bandwidth in uplink frame of oneself; Upstream rate is the ONU2 of 5Gbit/s receives the distribution structure that OLT sends in step 3 after; Value according to granularity 4 acquisition Start time obtains Grant size values according to granularity 8, obtains the position of upstream bandwidth in uplink frame of oneself.
Below provide the mode that several kinds of OLT obtain the upstream rate of ONU again:
Embodiment two
Embodiment two is with the difference of embodiment one, the corresponding relation of the sign-on ID of OLT storage ONU and the upstream rate of ONU, and OLT obtains the upstream rate of ONU in the following manner:
Step 501:OLT is that the ONU of the distance measuring states in the unregistered state of activation divides the upstream bandwidth that is used in the transmission registration message;
Step 502: the ONU that is in distance measuring states receive above-mentioned be used to send the bandwidth of registration message after, ONU sends registration message and gives OLT in said bandwidth;
Step 503:OLT receives the registration message that ONU sends in step 2 after, according to the upstream rate of sign-on ID with this ONU of corresponding relation acquisition of the upstream rate of ONU of the ONU of storage.
Other steps are identical with instance one, repeat no more here.
Embodiment three
Embodiment three is that with the difference of embodiment one OLT obtains the upstream rate of ONU in the following manner:
Step 601:OLT is that ONU divides the upstream bandwidth that is used in transmission upstream rate message;
Step 602:ONU receive above-mentioned be used to send the bandwidth of upstream rate message after; ONU sends upstream rate message and gives OLT in said bandwidth; As shown in the table; Said upstream rate message is made up of 5 parts, is respectively ONU sign (ONU ID), message identifier (message ID), serial number (SeqNo), the data (Data) that comprise up digit rate relevant information and message integrity check (MIC), and ONU has write the upstream rate of ONU in said Data.
| ONU?ID |
| Message?ID(10000000) |
| SeqNo |
| Data (upstream rate relevant information) |
| MIC |
Step 603:OLT receives the upstream rate message that ONU sends in step 2 after, obtain the upstream rate of this ONU.
Embodiment four
Embodiment four is with the difference of embodiment one; System default is provided with; The bit1 position in the indication territory of uplink burst is 0 o'clock, and the upstream rate of corresponding ONU is 2.5Gbit/s, and the bit1 position is 1 o'clock; The upstream rate of corresponding ONU is 5Gbit/s, and OLT obtains the upstream rate of ONU in the following manner:
Step 701:OLT is that ONU divides the upstream bandwidth that is used in the transmission uplink burst;
Step 702:ONU receive above-mentioned be used to send the bandwidth of uplink burst after, in said bandwidth, send the uplink burst comprise above-mentioned IND territory and give OLT;
Wherein, Upstream rate be the ONU2 of 5Gbit/s receive above-mentioned be used to send the bandwidth of uplink burst after; Bit1 position in the indication territory of the uplink burst that sends to OLT (IND) writes 1; Upstream rate be the ONU1 of 2.5Gbit/s receive above-mentioned be used to send the bandwidth of uplink burst after, write 0 in the bit1 position in the indication territory of the uplink burst that sends to OLT (IND).
Step 703:OLT receives the uplink burst that ONU sends in step 2 after, obtain the upstream rate of this ONU according to the value of the bit1 in said IND territory.
Other steps are identical with instance one, repeat no more here.
Embodiment five
Embodiment four is that with the difference of embodiment one OLT adopts following steps to obtain the upstream rate of ONU:
Step 801:OLT is that ONU divides the upstream bandwidth that is used in the transmission uplink burst;
Step 802:ONU receive above-mentioned be used to send the bandwidth of uplink burst after, in said bandwidth, send the uplink burst comprise delimiter and give OLT;
Wherein, Upstream rate be the ONU2 of 5Gbit/s receive above-mentioned be used to send the bandwidth of uplink burst after; Adopt the delimiter assembling uplink burst of 5Gbit/s upstream rate; Upstream rate be the ONU1 of 2.5Gbit/s receive above-mentioned be used to send the bandwidth of uplink burst after, adopt the delimiter assembling uplink burst of 2.5Gbit/s upstream rate.
Step 803:OLT receives the uplink burst that ONU sends in step 2 after, obtain the upstream rate of this ONU according to the value of said delimiter.
Other steps are identical with instance one, repeat no more here.
Above embodiment has following mapping mode:
The said granularity that adopts among the above embodiment is a system default value, and convertible ground also can adopt OLT to be in registration activation at ONU and will notify to this ONU said granularity that should ONU;
Convertible ground; The corresponding relation of the sequence number of OLT storage ONU and the upstream rate of ONU; On the basis of embodiment one, in step 402, ONU only sends the sequence number information of oneself to OLT; OLT receives the sequence number information that ONU sends in step 403 after, according to the upstream rate of sequence number with this ONU of corresponding relation acquisition of the upstream rate of ONU of storage ONU.
The message that is used to the information of transmitting Sequence Number, log-on message, upstream rate information among embodiment one and the embodiment two is PLOAM (Physical Layer Operations; Administration and Maintenance; The physical layer operations management maintenance) message; Certainly, also can realize through OMCI (ONUManagement and Control Interface, ONU manages control interface) message by ONU.
Among the above embodiment; Time started granularity and to authorize the size granularity different can certainly adopt identical granularity, like the acquiescence granularity for being constant; As 1; Correspondingly, in embodiment one, when distributing the byte number of transmit ascending data to be z for certain ONU; The value of Grant size in the distribution structure of distributing for this ONU is z, and OLT is that the value of the Start time in the distribution structure of the upstream bandwidth that distributes of next ONU is to confirm like this: according to time started of current ONU, authorize the time started that size and upstream rate thereof obtain next ONU.
Among the above embodiment, clear and definite OLT inserts the ONU of two kinds of different rates, certainly; Along with the appearance of different demands, can also insert the ONU of three kinds or more kinds of speed, its processing mode is basic identical; Understandably; For the system with the ONU that inserts different rates, even the ONU that current system inserts is the phase same rate, ONU still need send its upstream rate to OLT.
Under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
For realizing above method and embodiment, the present invention also provides a kind of passive optical network, and said passive optical network comprises:
Said ONU is used for according to the request or the active of optical line terminal (OLT) its upstream rate or upstream rate relevant information being sent to said OLT;
Said OLT connects the ONU of identical or different upstream rate, and being used for according to said upstream rate or the corresponding upstream rate of upstream rate relevant information is that said ONU carries out upstream bandwidth distribution.
Further, said upstream rate relevant information is logical message, sequence number information, log-on message or the demarcation information that has preset corresponding relation with said upstream rate.
Further, the said ONU mode of sending upstream rate or upstream rate relevant information comprises: utilize newly-built being used to transmit the PLOAM message of ONU upstream rate, utilize existing PLOAM message special domain, utilize the ONU management control interface information or utilize the specific bit position in the indication territory of uplink frame.
Further; The parameter that said OLT adopts when distributing upstream bandwidth for the ONU of different upstream rates comprises the time started and authorizes size; And the granularity of parameter is identical; Said OLT circulates successively and is that each ONU distributes bandwidth, comprises time started according to current ONU, authorizes the time started that size and upstream rate thereof obtain next ONU.
The parameter that adopts when further, said OLT distributes upstream bandwidth for the ONU of different upstream rates comprises the time started and authorizes size; The granularity of the time started of the ONU of different upstream rates is identical; Its granularity of authorizing size is directly proportional with upstream rate; The time started of the ONU of basis upstream rate is identical or different with the granularity of authorizing size; Said OLT is followed successively by each ONU and distributes bandwidth, comprises time started according to current ONU, authorizes the time started that size and basic upstream rate obtain next ONU.
Further, said parameter granularity is given said ONU by said OLT notice in registration activation, or is the default value of systemic presupposition.
Adopt in the method and system of the present invention, OLT can obtain the upstream rate of each ONU, and carries out upstream bandwidth distribution according to the upstream rate of ONU, thereby effectively utilizes each time slot of upstream bandwidth, improves uplink efficient.
Claims (13)
1. the uplink bandwidth allocation method in the EPON, it is characterized in that: this method comprises:
Said ONU is according to the request of said OLT or initiatively its upstream rate or upstream rate relevant information are sent to said OLT;
Said OLT is that said ONU carries out upstream bandwidth distribution according to said upstream rate or the corresponding upstream rate of upstream rate relevant information.
2. the method for claim 1 is characterized in that: said upstream rate relevant information is logical message, sequence number information, log-on message or the demarcation information that has preset corresponding relation with said upstream rate.
3. the method for claim 1 is characterized in that: the mode that said ONU sends upstream rate or upstream rate relevant information comprises: utilize newly-built being used to transmit the PLOAM message of ONU upstream rate, utilize existing PLOAM message special domain, utilize the ONU management control interface information or utilize the specific bit position in the indication territory of uplink frame.
4. method as claimed in claim 3 is characterized in that: said existing PLOAM message refers to ONU serial number message or registration message.
5. the method for claim 1; It is characterized in that: the parameter that said OLT adopts when distributing upstream bandwidth for the ONU of different upstream rates comprises the time started and authorizes size; And the granularity of parameter is identical; Said OLT circulates successively and is that each ONU distributes bandwidth, comprises time started according to current ONU, authorizes the time started that size and upstream rate thereof obtain next ONU.
6. the method for claim 1 is characterized in that: the parameter that said OLT adopts when distributing upstream bandwidth for the ONU of different upstream rates comprises the time started and authorizes size; The granularity of the time started of the ONU of different upstream rates is identical; Its granularity of authorizing size is directly proportional with upstream rate; Said OLT is followed successively by each ONU and distributes bandwidth, comprises time started according to current ONU, authorizes the time started that size and basic upstream rate obtain next ONU.
7. the method for claim 1 is characterized in that: said parameter granularity is given said ONU by said OLT notice in registration activation, or is the default value of systemic presupposition.
8. passive optical network, it is characterized in that: said passive optical network comprises:
Said ONU is used for according to the request or the active of optical line terminal (OLT) its upstream rate or upstream rate relevant information being sent to said OLT;
Said OLT connects the ONU of identical or different upstream rate, and being used for according to said upstream rate or the corresponding upstream rate of upstream rate relevant information is that said ONU carries out upstream bandwidth distribution.
9. passive optical network as claimed in claim 8 is characterized in that: said upstream rate relevant information is logical message, sequence number information, log-on message or the demarcation information that has preset corresponding relation with said upstream rate.
10. passive optical network as claimed in claim 8 is characterized in that: the mode that said ONU sends upstream rate or upstream rate relevant information comprises: utilize newly-built being used to transmit the PLOAM message of ONU upstream rate, utilize existing PLOAM message special domain, utilize the ONU management control interface information or utilize the specific bit position in the indication territory of uplink frame.
11. passive optical network as claimed in claim 8; It is characterized in that: the parameter that said OLT adopts when distributing upstream bandwidth for the ONU of different upstream rates comprises the time started and authorizes size; And the granularity of parameter is identical; Said OLT circulates successively and is that each ONU distributes bandwidth, comprises time started according to current ONU, authorizes the time started that size and upstream rate thereof obtain next ONU.
12. passive optical network as claimed in claim 8 is characterized in that: the parameter that said OLT adopts when distributing upstream bandwidth for the ONU of different upstream rates comprises the time started and authorizes size; The granularity of the time started of the ONU of different upstream rates is identical; Its granularity of authorizing size is directly proportional with upstream rate; Said OLT is followed successively by each ONU and distributes bandwidth, comprises time started according to current ONU, authorizes the time started that size and basic upstream rate obtain next ONU.
13. passive optical network as claimed in claim 8 is characterized in that: said parameter granularity is given said ONU by said OLT notice in registration activation, or is the default value of systemic presupposition.
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| CN201010276070.1A CN102387426B (en) | 2010-09-01 | 2010-09-01 | Uplink bandwidth allocation method in EPON |
| PCT/CN2011/076045 WO2012028014A1 (en) | 2010-09-01 | 2011-06-21 | Uplink bandwidth assigning method in passive optical network and passive optical network system |
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| CN201010276070.1A CN102387426B (en) | 2010-09-01 | 2010-09-01 | Uplink bandwidth allocation method in EPON |
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Also Published As
| Publication number | Publication date |
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| CN102387426B (en) | 2015-08-12 |
| WO2012028014A1 (en) | 2012-03-08 |
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