CN102387426B - Uplink bandwidth allocation method in EPON - Google Patents
Uplink bandwidth allocation method in EPON Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H04L47/70—Admission control; Resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0064—Arbitration, scheduling or medium access control aspects
Abstract
The present invention relates to the uplink bandwidth allocation method in EPON and passive optical network, in EPON (PON), optical line terminal (OLT) has the ability of the optical network unit (ONU) connecting different upstream rate, and the method comprises: described ONU is according to the request of described OLT or initiatively its upstream rate or upstream rate relevant information are sent to described OLT; Described OLT is that described ONU carries out upstream bandwidth distribution according to described upstream rate or upstream rate corresponding to upstream rate relevant information.Uplink bandwidth allocation method in EPON and passive optical network, to improve better upload bandwidth utilisation.
Description
Technical field
The present invention relates to communication technical field, particularly relate to the uplink bandwidth allocation method in a kind of EPON.
Background technology
Gigabit passive optical network (Gigabit-Capable Passive Optical Network, referred to as GPON) technology is an important technology branch in EPON (PON) family, with other PON technology type seemingly, GPON is also a kind of passive light access technology adopting point-to-multipoint topological structure.
The topological structure of GPON system as shown in Figure 1, GPON is by optical line terminal (the OpticalLine Terminal of office side, referred to as OLT), optical network unit (the Optical Network Unit of user side, referred to as ONU) and Optical Distribution Network (Optical Distributio Network, referred to as ODN) composition, usually adopt point-to-multipoint network configuration.ODN is made up of, for the physical connection between OLT and ONU provides light-transmitting medium Passive Optical Components such as monomode fiber, optical splitter, optical connectors.
Along with the development of Internet technology, day by day increase the demand of large bandwidth, the PON technology of future generation based on GPON technology develops rapidly, and wherein XG-PON technology is generally considered to the PON technology of future generation that may adopt in the future.The downstream rate of XG-PON1 technology is 10Gbit/s, and upstream rate is 2.5Gbit/s, and this can meet the demand of resident to bandwidth.The transfer of data in XG-PON system descending direction (by OLT to ONU) adopts broadcast mode, and each ONU receives all frames respectively, then obtains one's own frame according to ONU-ID, GEM-Port ID, Allocation-ID.For the transfer of data of up direction (from ONU to OLT), because each ONU needs shared transmission medium, ONU adopts time-multiplexed mode to issue in the control of OLT and send upstream data, and each ONU distributes to transmit ascending data in oneself time slot at OLT by Bandwidth map territory (BWmap).The structure of BWmap as shown in Figure 2, BWmap territory is made up of N number of distribution structure (Allocation Structure), each distribution structure is by Alloc-ID territory (Allocation Identifier, allocated bandwidth identifies, generally T-CONT (Transmission Container, transmission container) mark), Flags territory (the option of allocated bandwidth, 2 bits, a bit is used to indicate whether whether ONU sends up Dynamic Bandwidth Report (DBRu), another one bit is used to indicate ONU and whether sends ascending physical signal layer operation, administer and maintain (PLOAMu) message), time started (Start Time, represent the position of first character joint in the uplink frame of 125us of Transmission Convergence burst (XGTC burst) of the XG-PON that ONU sends), authorize size (GrantSize), pressure is revived instruction (FWI), burst overhead parameter (Bprofile) and hybrid error correction (HEC) composition.
When ONU receives an Allocation structure, if according to Alloc-ID, ONU judges that this Allocation structure distributes to oneself, then ONU carries out HEC verification to the data in the Allocationstructure received, if check results is correct, it is data in the T-CONT of Alloc-ID that the StartTime moment indicated at Allocationstructure is started to send bandwidth allocation identification by ONU, and the data length of transmission is the data length that ONU can send according to the ONU that the Context resolution that Grant size territory is carried goes out.
In prior art, passive optical network only can access the ONU of a kind of upstream rate (as 2.5Gbit/s), but along with the appearance of diversified demand, as, business user needs larger upstream bandwidth, proposes the demand of the upstream rate of 5Gbit/s, passive optical network needs the ONU that simultaneously can access two or more speed, in this case, how OLT carries out upstream bandwidth distribution, and raising better upload bandwidth utilisation is one problem to be solved.
Summary of the invention
The technical problem to be solved in the present invention is to provide uplink bandwidth allocation method in a kind of EPON and passive optical network, to improve better upload bandwidth utilisation.
For solving above technical problem, the invention provides the uplink bandwidth allocation method in a kind of EPON, the method comprises:
Described ONU is according to the request of described OLT or initiatively its upstream rate or upstream rate relevant information are sent to described OLT;
Described OLT is that described ONU carries out upstream bandwidth distribution according to described upstream rate or upstream rate corresponding to upstream rate relevant information.
Further, described upstream rate relevant information there is the logical message of default corresponding relation, sequence number information, log-on message or delimited information.
Further, the mode that described ONU sends upstream rate or upstream rate relevant information comprises: utilizing newly-built PLOAM message for transmitting ONU upstream rate, utilizing the special domain of existing PLOAM message, utilize ONU management control interface information or utilize the specific bit position of instructions field of uplink frame.
Further, described existing PLOAM message refers to ONU serial number message or registration message.
Further, the parameter that described OLT adopts when distributing upstream bandwidth to the ONU of different upstream rate comprises the time started and authorizes size, and the granularity of parameter is identical, described OLT circulates successively as each ONU distributes bandwidth, comprises the time started according to current ONU, authorizes the time started that size and upstream rate thereof obtain next ONU.
Further, the parameter adopted when described OLT distributes upstream bandwidth to the ONU of different upstream rate comprises the time started and authorizes size; The granularity of the time started of the ONU of different upstream rate is identical, its granularity of authorizing size is directly proportional to upstream rate, described OLT is followed successively by each ONU and distributes bandwidth, comprises the time started according to current ONU, authorizes the time started that size and based uplink speed obtains next ONU.
Further, described parameter granularity informs described ONU by described OLT in registration activation, or is the default value of systemic presupposition.
For solving above technical problem, present invention also offers a kind of passive optical network, described passive optical network comprises:
Described ONU, for according to the request of optical line terminal (OLT) or initiatively its upstream rate or upstream rate relevant information are sent to described OLT;
Described OLT, connects the ONU of identical or different upstream rate, for being that described ONU carries out upstream bandwidth distribution according to described upstream rate or upstream rate corresponding to upstream rate relevant information.
Further, described upstream rate relevant information there is the logical message of default corresponding relation, sequence number information, log-on message or delimited information.
Further, the mode that described ONU sends upstream rate or upstream rate relevant information comprises: utilizing newly-built PLOAM message for transmitting ONU upstream rate, utilizing the special domain of existing PLOAM message, utilize ONU management control interface information or utilize the specific bit position of instructions field of uplink frame.
Further, the parameter that described OLT adopts when distributing upstream bandwidth to the ONU of different upstream rate comprises the time started and authorizes size, and the granularity of parameter is identical, described OLT circulates successively as each ONU distributes bandwidth, comprises the time started according to current ONU, authorizes the time started that size and upstream rate thereof obtain next ONU.
Further, the parameter adopted when described OLT distributes upstream bandwidth to the ONU of different upstream rate comprises the time started and authorizes size; The granularity of the time started of the ONU of different upstream rate is identical, its granularity of authorizing size is directly proportional to upstream rate, described OLT is followed successively by each ONU and distributes bandwidth, comprises the time started according to current ONU, authorizes the time started that size and based uplink speed obtains next ONU.
Further, described parameter granularity informs described ONU by described OLT in registration activation, or is the default value of systemic presupposition.
In uplink bandwidth allocation method in EPON of the present invention and passive optical network, by ONU according to the request of described OLT or the upstream rate initiatively its upstream rate or upstream rate relevant information being sent to described OLT, OLT to report according to ONU or upstream rate corresponding to upstream rate relevant information for this ONU carries out upstream bandwidth distribution.
Accompanying drawing explanation
Fig. 1 is the topological structure schematic diagram of GPON system;
Fig. 2 is the structural representation of GPON downlink frame;
Fig. 3 is the schematic diagram of the uplink bandwidth allocation method in EPON of the present invention.
Embodiment
When a downstream rate be the OLT of 10Gbit/s by the different fiber branch road of ODN, to connect upstream rate be respectively the ONU of 2.5Gbit/s and 5Gbit/s time, the ONU of two kinds of speed adopts time-multiplexed mode to share uplink medium.OLT sends upstream data by each ONU of BWmap order at specific ascending time slot, the light-detecting device root of OLT can complete the detection of the uplink optical signal that two kinds of speed ONU send, and the light signal of detection is converted to the signal of telecommunication, after light signal is converted to the signal of telecommunication, OLT delivers to the processing of circuit of 2.5Gbit/s according to the signal that upstream rate is 2.5Gbit/s by upstream rate corresponding to different ascending time slot, is the processing of circuit that the signal of 5Gbit/s delivers to 5Gbit/s by upstream rate.By said method, OLT has the ability of the ONU simultaneously connecting different upstream rate.When OLT adopts above-mentioned BWmap to distribute upstream bandwidth to each ONU, Start time in BWmap represents the position of first character joint in the uplink frame of 125us of Transmission Convergence burst (XGTC burst) of the XG-PON that ONU sends, Grant size represents the data length that ONU sends, for identical Grant size, the time that the ONU of 5Gbit/s upstream rate sends data corresponding to described Grant size is that the ONU of 2.5Gbit/s upstream rate sends 1/2nd of the described Grantsize corresponding data time, therefore OLT is that the ONU of two kinds or two or more upstream rate is when distributing upstream bandwidth, in order to improve uplink efficiency, OLT needs the upstream rate knowing each ONU, after the upstream rate determining ONU, OLT can according to the Start time distributed for this ONU, the upstream rate of Grant size and this ONU calculates the time that this ONU in this uplink frame completes upstream data transmission, thus, OLT can calculate the time Starttime that next ONU starts to send upstream data.
Therefore, under the prerequisite improving uplink efficiency, when connecting the ONU of two kinds and two or more upstream rate under OLT, for each ONU carries out allocated bandwidth after OLT needs to obtain the upstream rate of each ONU.
Uplink bandwidth allocation method in EPON of the present invention and the main thought of passive optical network are, by ONU according to the request of described OLT or the upstream rate initiatively its upstream rate or upstream rate relevant information being sent to described OLT, OLT to report according to ONU or upstream rate corresponding to upstream rate relevant information for this ONU carries out upstream bandwidth distribution.
When the OLT of EPON has the ability of the ONU connecting different rates simultaneously, the speed of its ONU connected may be identical or different, and as shown in Figure 3, the uplink bandwidth allocation method in EPON of the present invention comprises:
Step 301:ONU is according to the request of described OLT or initiatively its upstream rate or upstream rate relevant information are sent to described OLT;
Described upstream rate relevant information there is the logical message of default corresponding relation, sequence number information, log-on message or delimited information.
Step 302: described OLT is that described ONU carries out upstream bandwidth distribution according to described upstream rate or upstream rate corresponding to upstream rate relevant information.
The mode that described ONU sends upstream rate or upstream rate relevant information comprises: utilizing newly-built PLOAM message for transmitting ONU upstream rate, utilizing the special domain of existing PLOAM message, utilize OMCI message or utilize the specific bit position of instructions field of uplink frame.Described existing PLOAM message can be ONU serial number message or sign-on ID message.Refer to subsequent embodiment.
The parameter that described OLT adopts when distributing upstream bandwidth to the ONU of different upstream rate comprises the time started and authorizes size, and the granularity of parameter may be the same or different.
Simultaneously, described OLT circulates successively as each ONU distributes bandwidth for the granularity homogeneous phase of parameter, comprises the time started according to current ONU, authorizes the time started that size and upstream rate thereof obtain next ONU.It is identical identical with implicit expression that identical situation comprises display.
The different implementation of parameter granularity as: the granularity of the time started of the ONU of different upstream rate is identical, and its granularity of authorizing size is directly proportional to upstream rate, and time started of the ONU of based uplink speed and to authorize the granularity of size identical or different.After introducing parameter granularity, OLT is followed successively by each ONU and distributes bandwidth, according to time started of current ONU, authorizes the time started that size and based uplink speed obtains next ONU.
As: the ONU of access 2.5Gbit/s, 5Gbit/s, 10Gbit/s tri-kinds of speed, if upstream rate based on the ONU of 5Gbit/s, its time started and the granularity of authorizing size are all 4, then 2.5Gbit/s ONU to authorize scale particle size be the granularity of authorizing size of the ONU of 2,10Gbit/s is 8.
As: OLT is the granularity of authorizing size that constant C, OLT distribute in the distribution structure of upstream bandwidth to the ONU that speed is minimum speed limit n times to the ONU granularity of authorizing size of distributing in the distribution structure of upstream bandwidth that speed is minimum is constant n × C;
The ONU that speed is minimum receives after OLT distributes to the distribution structure of oneself, according to the time started in distribution structure, authorize size and granularity C determines that OLT distributes to the position of upstream bandwidth in uplink frame of oneself, speed is that minimum speed limit n ONU doubly receives after OLT distributes to the distribution structure of oneself, according to the time started in distribution structure, authorizes size and granularity n × C determines that OLT distributes to the position of upstream bandwidth in uplink frame of oneself.
Understandably, ONU and OLT has identical time started granularity, and identical authorizes scale particle size.Described parameter granularity can inform described ONU by described OLT in registration activation, or is the default value of systemic presupposition.
Upstream bandwidth involved in the present invention distributes the allocated bandwidth being only applicable to the upstream data relevant to the upstream rate of current ONU.
Embodiment one
Downstream rate is the ONU connecting two kinds of upstream rates under the OLT of 10Gbit/s, be respectively ONU1 that upstream rate is 2.5Gbit/s and upstream rate is the ONU2 of 5Gbit/s, it is 4 that system default arranges the granularity of value that OLT distributes Start time and Grant Size in the distribution structure of upstream bandwidth to the ONU1 that upstream rate is 2.5Gbit/s, the granularity of value of distributing Start time in the distribution structure of upstream bandwidth to the upstream rate ONU2 that is 5Gbit/s is the granularity of the value of 4, Grant Size is 8.Herein, by the reason that the granularity of the value of the Grant Size of ONU2 is set to 8 be, upstream rate based on the upstream rate of ONU1, is embodied in the granularity of Grant Size by the rate multiple relation of ONU2 and ONU1, and namely the granularity of Grant Size is directly proportional with corresponding upstream rate.
It is as follows that OLT is that the ONU of two kinds of speed distributes the key step of upstream bandwidth respectively:
Step 401:OLT is that (ONU has various states for serial-number-state in unregistered state of activation, serial-number-state is wherein a kind of state) ONU divide the shared bandwidth being used in the message that transmits Sequence Number, the value of the x of the value of the Start time of the distribution structure that described shared bandwidth is corresponding, Grant size is y;
The serial number message bandwidth of herein distributing distributes to the common upstream bandwidth of two kinds of speed ONU, and the ONU that namely 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, is equivalent to obtain the bandwidth exceeding actual needs time the ONU of such two-forty resolves.Because be described previously the ONU place system default granularity of Grantsize, so the Grantsize of ONU1 with ONU2 is different.
Step 402: the ONU being in serial-number-state receives above-mentioned for after the bandwidth of the information of transmitting Sequence Number, the bandwidth of the information of transmitting Sequence Number is obtained according to the granularity of the value of Start time and Grant size and the Start time of system default and Grant size, namely upstream rate is the ONU1 of 2.5Gbit/s obtains the information of transmitting Sequence Number bandwidth according to the granularity 4 of Starttime and Grant size, upstream rate is the ONU2 of 5Gbit/s obtains the information of transmitting Sequence Number bandwidth according to the granularity 4 and 8 of Start time and Grant size, the serial number message that ONU sends self according to the bandwidth of the information that transmits Sequence Number parsed is to OLT, the region filling (Padding) that simultaneously upstream rate of self is write on sequence number information by ONU reports OLT,
After step 403:OLT receives the serial number message that ONU sends in step 2, obtain sequence number information and the upstream rate information of this ONU, OLT is this ONU distribution upstream bandwidth according to described upstream rate information, when the byte number distributing transmit ascending data for certain ONU is z, if the upstream rate of this ONU is 2.5Gbit/s, then for the value of the Grant size in the distribution structure of this ONU distribution is z/4, if the upstream rate of this ONU is 5Gbit/s, then for the value of the Grant size in the distribution structure of this ONU distribution is z/8, OLT is the value of Start time in the distribution structure of the upstream bandwidth that the ONU of two kinds of speed distributes is all that the value being the granularity 4 of the ONU of 2.5Gbit/s according to upstream rate carries out distributing, 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 based uplink speed obtains next ONU.
Step 404: upstream rate is after the ONU1 of 2.5Gbit/s receives the distribution structure that OLT sends in step 3, resolve OLT according to granularity 4 and distribute to Start time in the distribution structure of oneself and Grantsize value, obtain the position of upstream bandwidth in uplink frame of oneself, upstream rate is after the ONU2 of 5Gbit/s receives the distribution structure that OLT sends in step 3, the value of Start time is obtained according to granularity 4, obtain Grant size value according to granularity 8, obtain the position of upstream bandwidth in uplink frame of oneself.
Below the mode that several OLT obtains the upstream rate of ONU is provided again:
Embodiment two
Embodiment two is with the difference of embodiment one, and OLT stores the corresponding relation of the sign-on ID of 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 distance measuring states in unregistered state of activation divides the upstream bandwidth being used in and sending registration message;
Step 502: after the ONU being in distance measuring states receives the above-mentioned bandwidth for sending registration message, ONU sends registration message to OLT in described bandwidth;
After step 503:OLT receives the registration message that ONU sends in step 2, obtain the upstream rate of this ONU according to the corresponding relation of the sign-on ID of ONU stored and the upstream rate of ONU.
Other steps are identical with example one, repeat no more herein.
Embodiment three
Embodiment three is with the difference of embodiment one, and OLT obtains the upstream rate of ONU in the following manner:
Step 601:OLT is that ONU divides the upstream bandwidth being used in and sending upstream rate message;
After step 602:ONU receives the above-mentioned bandwidth for sending upstream rate message, ONU sends upstream rate message to OLT in described bandwidth, as shown in the table, described upstream rate message is made up of 5 parts, be respectively ONU and identify (ONU ID), message identifier (message ID), serial number (SeqNo), the data (Data) comprising up digit rate relevant information and message integrity check (MIC), ONU is written with the upstream rate of ONU in described Data.
| ONU ID |
| Message ID(10000000) |
| SeqNo |
| Data (upstream rate relevant information) |
| MIC |
Step 603:OLT obtains the upstream rate of this ONU after receiving the upstream rate message that ONU sends in step 2.
Embodiment four
Embodiment four is with the difference of embodiment one, system default is arranged, when the bit1 position of the instructions field of uplink burst is 0, the upstream rate of corresponding ONU is 2.5Gbit/s, when bit1 position is 1, the upstream rate of corresponding ONU is the upstream rate that 5Gbit/s, OLT obtain ONU in the following manner:
Step 701:OLT is that ONU divides the upstream bandwidth being used in and sending uplink burst;
After step 702:ONU receives the above-mentioned bandwidth for sending uplink burst, in described bandwidth, transmission comprises the uplink burst in above-mentioned IND territory to OLT;
Wherein, upstream rate is after the ONU2 of 5Gbit/s receives the above-mentioned bandwidth for sending uplink burst, 1 is write in the bit1 position of the instructions field (IND) sending to the uplink burst of OLT, upstream rate is after the ONU1 of 2.5Gbit/s receives the above-mentioned bandwidth for sending uplink burst, writes 0 in the bit1 position of the instructions field (IND) sending to the uplink burst of OLT.
Step 703:OLT obtains the upstream rate of this ONU after receiving the uplink burst that ONU sends in step 2 according to the value of the bit1 in described IND territory.
Other steps are identical with example one, repeat no more herein.
Embodiment five
Embodiment four is with the difference of embodiment one, and OLT adopts following steps to obtain the upstream rate of ONU:
Step 801:OLT is that ONU divides the upstream bandwidth being used in and sending uplink burst;
After step 802:ONU receives the above-mentioned bandwidth for sending uplink burst, in described bandwidth, transmission comprises the uplink burst of delimiter to OLT;
Wherein, upstream rate is after the ONU2 of 5Gbit/s receives the above-mentioned bandwidth for sending uplink burst, adopt the delimiter assembling uplink burst of 5Gbit/s upstream rate, upstream rate is after the ONU1 of 2.5Gbit/s receives the above-mentioned bandwidth for sending uplink burst, adopts the delimiter assembling uplink burst of 2.5Gbit/s upstream rate.
Step 803:OLT obtains the upstream rate of this ONU after receiving the uplink burst that ONU sends in step 2 according to the value of described delimiter.
Other steps are identical with example one, repeat no more herein.
Above embodiment has following mapping mode:
The described granularity adopted in above embodiment is system default value, convertiblely, OLT also can be adopted to be in registration activation by the described granularity of ONU informing to this ONU at ONU;
Convertiblely, OLT stores the corresponding relation of the sequence number of ONU and the upstream rate of ONU, on the basis of embodiment one, in step 402, ONU only sends oneself sequence number information to OLT, after OLT receives the sequence number information of ONU transmission in step 403, obtain the upstream rate of this ONU according to the corresponding relation storing the sequence number of ONU and the upstream rate of ONU.
The message for the information of transmitting Sequence Number, log-on message, upstream rate information in embodiment one and embodiment two is PLOAM (Physical Layer Operations, Administration andMaintenance, physical layer operations management maintenance) message, certainly, also can be realized by OMCI (ONUManagement and Control Interface, ONU manages control interface) message by ONU.
In above embodiment, time started granularity and to authorize scale particle size different, identical granularity can certainly be adopted, as given tacit consent to granularity for being constant, as 1, correspondingly, in embodiment one, when the byte number distributing transmit ascending data for certain ONU is z, for the value of the value of the Grant size in the distribution structure that this ONU the distributes Start time that to be z, OLT be in the distribution structure of the upstream bandwidth that next ONU distributes is determined like this: according to time started of current ONU, authorize the time started that size and upstream rate thereof obtain next ONU.
In above embodiment, clear and definite OLT accesses the ONU of two kinds of different rates, certainly, along with the appearance of different demand, can also access the ONU of three kinds or more kind speed, its processing mode is substantially identical, understandably, for having the system of the ONU accessing different rates, even if the ONU of current system access is phase same rate, ONU still needs to send its upstream rate to OLT.
When not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
For realizing above method and embodiment, present invention also offers a kind of passive optical network, described passive optical network comprises:
Described ONU, for according to the request of optical line terminal (OLT) or initiatively its upstream rate or upstream rate relevant information are sent to described OLT;
Described OLT, connects the ONU of identical or different upstream rate, for being that described ONU carries out upstream bandwidth distribution according to described upstream rate or upstream rate corresponding to upstream rate relevant information.
Further, described upstream rate relevant information there is the logical message of default corresponding relation, sequence number information, log-on message or delimited information.
Further, the mode that described ONU sends upstream rate or upstream rate relevant information comprises: utilizing newly-built PLOAM message for transmitting ONU upstream rate, utilizing the special domain of existing PLOAM message, utilize ONU management control interface information or utilize the specific bit position of instructions field of uplink frame.
Further, the parameter that described OLT adopts when distributing upstream bandwidth to the ONU of different upstream rate comprises the time started and authorizes size, and the granularity of parameter is identical, described OLT circulates successively as each ONU distributes bandwidth, comprises the time started according to current ONU, authorizes the time started that size and upstream rate thereof obtain next ONU.
Further, the parameter adopted when described OLT distributes upstream bandwidth to the ONU of different upstream rate comprises the time started and authorizes size; The granularity of the time started of the ONU of different upstream rate is identical, its granularity of authorizing size is directly proportional to upstream rate, the time started of the ONU of based uplink speed is identical or different with the granularity of authorizing size, described OLT is followed successively by each ONU and distributes bandwidth, comprises the time started according to current ONU, authorizes the time started that size and based uplink speed obtains next ONU.
Further, described parameter granularity informs described ONU by described OLT in registration activation, or is the default value of systemic presupposition.
Adopt in 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, thus effectively utilizes each time slot of upstream bandwidth, improves uplink efficiency.
Claims (11)
1. the uplink bandwidth allocation method in EPON, is characterized in that: the method comprises:
Optical network unit ONU is according to the request of optical line terminal OLT or initiatively its upstream rate or upstream rate relevant information are sent to described OLT;
Described OLT is that described ONU carries out upstream bandwidth distribution according to described upstream rate or upstream rate corresponding to upstream rate relevant information;
The parameter that described OLT adopts when distributing upstream bandwidth to the ONU of different upstream rate comprises the time started and authorizes size; The granularity of the time started of the ONU of different upstream rate is identical, its granularity of authorizing size is directly proportional to upstream rate, described OLT is followed successively by each ONU and distributes bandwidth, comprises the time started according to current ONU, authorizes the time started that size and based uplink speed obtains next ONU.
2. the method for claim 1, is characterized in that: described upstream rate relevant information there is the logical message of default corresponding relation, sequence number information, log-on message or delimited information.
3. the method for claim 1, is characterized in that: the mode that described ONU sends upstream rate or upstream rate relevant information comprises: utilizing newly-built physical layer operations management maintenance PLOAM message for transmitting ONU upstream rate, utilizing the special domain of existing PLOAM message, utilize ONU management control interface information or utilize the specific bit position of instructions field of uplink frame.
4. method as claimed in claim 3, is characterized in that: described 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 adopted when described OLT distributes upstream bandwidth to the ONU of different upstream rate comprises the time started and authorizes size, and the granularity of parameter is identical, described OLT circulates successively as each ONU distributes bandwidth, comprises the 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: described parameter granularity informs described ONU by described OLT in registration activation, or is the default value of systemic presupposition.
7. a passive optical network, is characterized in that: described passive optical network comprises:
Optical network unit ONU, for according to the request of optical line terminal OLT or initiatively its upstream rate or upstream rate relevant information are sent to described OLT;
Described OLT, connects the ONU of identical or different upstream rate, for being that described ONU carries out upstream bandwidth distribution according to described upstream rate or upstream rate corresponding to upstream rate relevant information;
The parameter that described OLT adopts when distributing upstream bandwidth to the ONU of different upstream rate comprises the time started and authorizes size; The granularity of the time started of the ONU of different upstream rate is identical, its granularity of authorizing size is directly proportional to upstream rate, described OLT is followed successively by each ONU and distributes bandwidth, comprises the time started according to current ONU, authorizes the time started that size and based uplink speed obtains next ONU.
8. passive optical network as claimed in claim 7, is characterized in that: described upstream rate relevant information there is the logical message of default corresponding relation, sequence number information, log-on message or delimited information.
9. passive optical network as claimed in claim 7, is characterized in that: the mode that described ONU sends upstream rate or upstream rate relevant information comprises: utilizing newly-built PLOAM message for transmitting ONU upstream rate, utilizing the special domain of existing PLOAM message, utilize ONU management control interface information or utilize the specific bit position of instructions field of uplink frame.
10. passive optical network as claimed in claim 7, it is characterized in that: the parameter adopted when described OLT distributes upstream bandwidth to the ONU of different upstream rate comprises the time started and authorizes size, and the granularity of parameter is identical, described OLT circulates successively as each ONU distributes bandwidth, comprises the time started according to current ONU, authorizes the time started that size and upstream rate thereof obtain next ONU.
11. passive optical networks as claimed in claim 7, is characterized in that: described parameter granularity informs described ONU by described OLT in registration activation, or is the default value of systemic presupposition.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN103634086B (en) * | 2012-08-28 | 2018-12-21 | 中兴通讯股份有限公司 | Adjust method, system, local side apparatus and the CPE of the distribution of uplink and downlink time |
| CN103840903A (en) * | 2012-11-23 | 2014-06-04 | 中兴通讯股份有限公司 | Method and system for operating wavelength tuning |
| CN105191340B (en) * | 2013-02-26 | 2019-05-24 | 中兴通讯股份有限公司 | Method, system, unit and the equipment of the channel mapping of optical network unit activating |
| CA3048928A1 (en) * | 2016-12-30 | 2018-07-05 | Huawei Technologies Co., Ltd. | Data communications system, optical line terminal, and baseband unit |
| CN110943783B (en) * | 2018-09-25 | 2022-08-19 | 中兴通讯股份有限公司 | Distance measurement method of optical network, OLT, ONU and optical network system |
| CN112492411A (en) * | 2020-08-14 | 2021-03-12 | 中兴通讯股份有限公司 | Response method and device of registration request |
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| CN1529428A (en) * | 2003-10-17 | 2004-09-15 | ���ͨ�ſƼ��ɷ�����˾ | Kilomega Ethernet passive optical network up-flow-section integrating bandwidth distributing method |
| CN101552932A (en) * | 2008-04-01 | 2009-10-07 | 华为技术有限公司 | Method, devices and system for transmitting and processing optical-fiber network |
| CN101668233A (en) * | 2008-09-01 | 2010-03-10 | 中兴通讯股份有限公司 | Hardware device and method for assisting in processing dynamic bandwidth allocation algorithm |
| US7719977B2 (en) * | 2003-09-15 | 2010-05-18 | Teknovus, Inc. | Method and apparatus for dynamically allocating upstream bandwidth in passive optical networks |
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| CN100581294C (en) * | 2005-11-18 | 2010-01-13 | 真宽通信技术（苏州）有限公司 | Method for Ethernet passive optical network multi service dynamic bandwidth request |
| CN101383767B (en) * | 2008-10-23 | 2012-02-29 | 中兴通讯股份有限公司 | Uplink bandwidth allocation method and optical line terminal |
| CN101753431B (en) * | 2008-12-22 | 2012-01-11 | 中兴通讯股份有限公司 | Uplink bandwidth estimation method and device |
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| US7719977B2 (en) * | 2003-09-15 | 2010-05-18 | Teknovus, Inc. | Method and apparatus for dynamically allocating upstream bandwidth in passive optical networks |
| CN1529428A (en) * | 2003-10-17 | 2004-09-15 | ���ͨ�ſƼ��ɷ�����˾ | Kilomega Ethernet passive optical network up-flow-section integrating bandwidth distributing method |
| CN101552932A (en) * | 2008-04-01 | 2009-10-07 | 华为技术有限公司 | Method, devices and system for transmitting and processing optical-fiber network |
| CN101668233A (en) * | 2008-09-01 | 2010-03-10 | 中兴通讯股份有限公司 | Hardware device and method for assisting in processing dynamic bandwidth allocation algorithm |
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