CN101296112B - Method, device and system for implementing Ethernet service quality in optical network unit - Google Patents
Method, device and system for implementing Ethernet service quality in optical network unit Download PDFInfo
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Abstract
The invention discloses a method, a device and a system for realizing Ethernet service quality used in an optical network unit, wherein, the method comprises the following steps: in the embodiment of the invention, a configuration data management entity of the Ethernet service quality is established according to a request of an optical line terminal; after the successful establishment of the configuration data management entity of the Ethernet service quality, the data from the optical line terminal is utilized for setting service quality parameters by the configuration data management entity of the Ethernet service quality; priority discarding parameters of messages are configured according to the service quality parameters; the Ethernet service quality is managed according to the priority discarding parameters. The invention realizes the Ethernet service quality in the optical network unit of a gigabit passive optical network (GPON) by increasing the configuration data management entity of Ethernet service quality.
Description
Technical field
The present invention relates to communication technical field, relate in particular to method, the Apparatus and system of realizing Ethernet service quality in a kind of optical network unit.
Background technology
GPON (gigabit passive optical network) is the EPON of latest generation, has high bandwidth, high efficiency, large coverage, numerous advantages such as user interface is abundant.With respect to other PON technology, GPON more pays attention to multi-service and QOS (quality of service) guarantees, therefore is subjected to very much the favor of telecom operators.
GPON is when realizing Ethernet service, that the Ethernet message that sends when user side takes place in ONU (optical network unit) is congested (such as, receive the excessive velocities of Ethernet message, bandwidth deficiency that ONU is up to OLT, ONU innernal CPU overload encapsulate forwarded Ethernet message etc. in time from user side) time, need abandon part of message, solve the network congestion problem with this.
In the existing technology that solves network congestion, generally all be rule, send earlier for the message that arrives first according to first in first out, after the message that arrives, no matter priority how, directly abandons.Owing in this technology, be to carry out to abandoning of Ethernet message, and do not consider priority of messages, therefore can not guarantee the service quality QOS of GPON when realizing Ethernet service according to the order that message arrives.
In the technology of existing solution network congestion, all right random drop part message guarantees that remaining message can in time send.Owing in this technology, abandoning at random of Ethernet message carried out, do not consider priority of messages yet, therefore can not guarantee the QOS of GPON when realizing Ethernet service.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of the embodiment of the invention provides method, the Apparatus and system of realizing Ethernet service quality in a kind of optical network unit, in the embodiment of the invention, by increasing an Ethernet quality of service configuration data management entity, in the optical network unit of GPON, realize Ethernet service quality thereby reach.
The purpose of the embodiment of the invention is to be achieved through the following technical solutions:
The embodiment of the invention provides the method that realizes Ethernet service quality in a kind of optical network unit, comprising:
According to the request of optical line terminal, create Ethernet quality of service configuration data management entity;
After the described Ethernet quality of service configuration data management entity set-up success, utilize the data that come from optical line terminal, QoS parameter is set by described Ethernet quality of service configuration data management entity;
Preferentially abandon parameter according to described QoS parameter configuration message;
Carry out the Ethernet Service Quality Management according to the described parameter that preferentially abandons.
The embodiment of the invention also provides a kind of optical network unit of realizing the Ethernet Service Quality Management, comprising:
Ethernet quality of service configuration data management entity set-up module is used for creating Ethernet quality of service configuration data management entity according to the request of optical line terminal;
The Ethernet bridge connection module is used for the QoS parameter according to described Ethernet quality of service configuration data management physical arrangements, and what message was set preferentially abandons parameter;
Ethernet transmission convergence layer processing module is used for according to the described parameter that preferentially abandons message being carried out the Ethernet Service Quality Management.
The embodiment of the invention provides a kind of optical line terminal equipment of realizing the Ethernet Service Quality Management again, comprising:
Ethernet Service Quality Management request sending module is used to send the solicited message of establishment Ethernet quality of service configuration data management entity to optical network unit;
Ethernet quality of service data sending module, after described Ethernet quality of service configuration data management entity set-up success, described Ethernet quality of service data sending module sends and is used for the data of configuration service mass parameter to described Ethernet quality of service configuration data management entity.
The embodiment of the invention also provides a kind of system that realizes Ethernet service quality in optical network unit, comprising:
Optical line terminal is used to ask optical network unit to create Ethernet quality of service configuration data management entity, and to optical network unit QoS parameter is set by described Ethernet quality of service configuration data management entity;
Optical network unit, be used for creating Ethernet quality of service configuration data management entity according to the request of optical line terminal, according to described QoS parameter, the message that user side is sent is provided with and preferentially abandons parameter, and carries out the Ethernet Service Quality Management according to the described parameter that preferentially abandons.
The technical scheme that is provided by the invention described above embodiment as can be seen, the embodiment of the invention provides method, the Apparatus and system of realizing Ethernet service quality in a kind of optical network unit, in the embodiment of the invention, by increasing an Ethernet quality of service configuration data management entity, in the optical network unit of GPON, realize Ethernet service quality thereby reach.
Description of drawings
Fig. 1 is the schematic flow sheet of the described method of the embodiment of the invention;
Fig. 2 is provided with the schematic diagram that concerns of token number in probability and the token bucket for the described discardable sign of the embodiment of the invention;
Fig. 3 carries out the schematic flow sheet of access rate restriction operation for the embodiment of the invention is described;
Fig. 4 is the structural representation of the described optical network unit of the embodiment of the invention;
Fig. 5 is the structural representation of the described optical line terminal of the embodiment of the invention;
Fig. 6 is the structural representation of the described system of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the method that realizes Ethernet service quality in the described optical network unit of the embodiment of the invention is elaborated.
Fig. 1 is the schematic flow sheet of the described method of the embodiment of the invention, and described method specifically comprises:
Step 11, when GPON realizes Ethernet service, when ONU after OLT (optical line terminal) succeeds in registration, OLT asks this ONU to create Ethernet quality of service configuration data management entity;
Step 12, ONU create described Ethernet quality of service configuration data management entity;
After step 13, the success of described Ethernet quality of service configuration data management entity set-up, ONU is by described Ethernet quality of service configuration data management physical arrangements QoS parameter;
The message that step 14, ONU send user side according to described QoS parameter is provided with and preferentially abandons parameter;
Step 15, ONU carry out the Ethernet Service Quality Management according to the described parameter that preferentially abandons to described message.
For example the described method of the embodiment of the invention is described below.
When GPON realizes Ethernet service, at ONU after OLT (optical line terminal) succeeds in registration, OLT request ONU creates Ethernet quality of service configuration data management entity (Ethernet QOSConfiguration Data ME), ONU is by described Ethernet quality of service configuration data management physical arrangements QoS parameter, described QoS parameter comprises: the DEI configuration of S-VLAN label, the DEI configuration of C-VLAN label, PCP coding schedule, PCP decoding table, and then the definition of Ethernet quality of service configuration data management entity can be as described below:
Describe: this management entity is used to organize ONU to realize the related data parameter of Ethernet service quality QoS, comprises DEI (discardable sign) configuration, the DEI configuration of C-VLAN (user's VLAN) label, PCP (message priority territory) coding schedule, the PCP decoding table of S-VLAN (professional VLAN) label;
Correlation: an example of zero or this management entity can with the quality of service configuration data management entity associated of MAC bridge port;
Attribute:
| Quality of service configuration data management entity identification | This attribute is used to each example of this quality of service configuration data management entity that a unique sequence number is provided. |
| The DEI configuration of S-VLAN label | This attribute is used to represent which kind of DEI strategy the S-VLAN label adopts, and how to support priority and preferentially abandon parameter to encode jointly, and concrete Code And Decode mode is described by other attribute.00:8P0D (default value) does not support preferentially to abandon parameter 01:7P1D, support 7 kinds of different priority and one preferentially to abandon 02:6P2D, support 6 kinds of different priority and 2 preferentially to abandon 03:5P3D, support 5 kinds of different priority and 3 preferentially to abandon the 04:S-VLAN label and support other value of DEI bit: keep (1 byte) (readable, can write, be provided with) (forcing to realize) by creating |
| The DEI configuration of C-VLAN label | This attribute is used to represent which kind of DEI strategy the S-VLAN label adopts, and how to support priority and preferentially abandon parameter to encode jointly, and concrete Code And Decode mode is described by other attribute.00:8P0D (default value) does not support preferentially to abandon parameter 01:7P1D, supports 7 kinds of different priority and one preferentially to abandon 02:6P2D, supports 6 kinds of different priority and 2 preferentially to abandon 03:5P3D, supports 5 kinds of different priority and 3 preferentially to abandon |
| Other value: keep (1 byte) (readable, can write, be provided with) (forcing to realize) by creating | |
| The PCP coding schedule | How this attribute has been listed priority and DEI encoded and has been generated PCP field in the VLAN label.This table provides four list items, and each list item accounts for 16 bytes.Four list items are represented the coded system of 8P0D, 7P1D, 6P2D and 5P3D respectively, 16 corresponding respectively 8 priority of byte (comprise preferentially not abandoning sign and having preferentially abandoning sign, respectively account for a byte and represent mapping mode) in each list item.(readable, can write, by establishment is set) (forcing to realize) (4*16 byte) |
| The PCP decoding table | How this attribute has been listed the PCP field decoding in the VLAN label, generates priority and DEI.This table provides four list items, and each list item accounts for 8 bytes.Four list items are represented the decoding process of 8P0D, 7P1D, 6P2D and 5P3D respectively, and 8 bytes are respectively to 8 PCP value decodings in each list item.(readable, can write, by establishment is set) (forcing to realize) (4*16 byte) |
When GPON realizes Ethernet service, ONU receives the Ethernet message that user side is sent, described ONU is according to the Ethernet QoS parameter by Ethernet quality of service configuration data management physical arrangements, what message was set preferentially abandons parameter, be about to DEI and/or PCP on the corresponding packet labeling, can be provided with according to the token number in the token bucket in the specific implementation process of the embodiment of the invention and preferentially abandon parameter probability is set, and probability is set DEI and/or PCP are set according to the described parameter that preferentially abandons.
For example, Fig. 2 is for being provided with the schematic diagram that discardable sign DEI is provided with probability according to the token number in the token bucket, and when the ONU system was initial, the token number was 0; When message arrived formation, the token number added 1; After message successfully sent, the token number subtracted 1.Here, setting Mini-Threshold is the minimum threshold values of token number in the token bucket.When the token number was worth smaller or equal to this, it was 0 that discardable sign is provided with probability; Setting Max-Threshold is the maximum threshold values of token number in the token bucket.When the token number was worth more than or equal to this, it was 1 that discardable sign is provided with probability.
When discardable sign is provided with probability smaller or equal to 0 the time, all messages all needn't be provided with DEI; When discardable sign is provided with probability more than or equal to 1 the time, all messages are provided with DEI; Probability is set greater than 0 when abandoning sign, and less than 1 o'clock, all messages of receiving is provided with probability DEI is set by abandoning sign, such as, when discardable sign is provided with probability and is 0.5, in all messages that receive half is provided with DEI, second half is not provided with DEI.
Encode according to priority of messages and DEI then, generate the PCP field.
For example the described method of the embodiment of the invention is described below.
For example, after ONU receives the data that are used for the configuration service mass parameter that OLT sends, parse,
The DEI of S-VLAN label is configured to: 04, that is and, the S-VLAN label is supported the DEI bit;
The DEI of C-VLAN label is configured to: 01, that is and, C-VLAN supports priority different in 7 and one preferentially to abandon;
Then the PCP coding schedule is as follows:
The PCP decoding table is as follows:
Situation for double-layer label:
When encoding,, beat if desired and preferentially abandon label, then DEI is put 1, otherwise DEI is put 0 for S-VLAN for the message of receiving.For C-VLAN,, then remain unchanged if PCP is 0,1,2,3,6,7; If PCP is 5, put when needs so and preferentially abandon when sign, it is revised as 4, otherwise, remain unchanged; If PCP is 4, put when needs so and preferentially abandon when sign, remain unchanged; Otherwise, it is revised as 5.
During decoding,, if DEI is 1, then be preferentially to abandon, otherwise be not preferentially to abandon for S-VLAN; For C-VLAN, if PCP is 0,1,2,3,6,7 o'clock, then respectively corresponding 0,1,2,3,6,7 priority; If PCP is 4, then corresponding to priority is 4, and is preferentially to abandon; If PCP is 5, then corresponding priority is 4, and is not preferentially to abandon.
Situation for single layer label:
For single layer label, to distinguish S-VLAN label or C-VLAN label earlier, carry out the respective coding decoding according to method recited above then.
When single layer label was the S-VLAN label, the DEI position can not be used as and preferentially abandon sign, and therefore, preferentially abandon sign and do not beat all the same for the situation of 8P0D this moment.
Code And Decode method recited above, existing ripe scheme in the technology only illustrates here now, and specific implementation has just repeated no more.
Above-mentioned when probability being set DEI is set according to discardable sign, can select the part message that DEI is set at random, finally make probability is set meets the demands; Also can judge the PCP position, from the message setting of low priority, till probability is set meets the demands.
Then, according to DEI and PCP message is carried out Service Quality Management, described Service Quality Management can limit CAR for access rate, and the specific implementation process can comprise as shown in the figure:
Step 31, ONU receive message from user side, are up to the bandwidth situation of OLT according to current ONU, judge whether to be CAR, if the upstream bandwidth deficiency then needs to be CAR, at this moment, need the PCP of message be decoded, and execution in step 32;
Step 32, preferentially be discarded in and be provided with the message that preferentially abandons parameter in the Ethernet bridge connection module; Be exactly specifically, when the message that carries when message has double-layer label (S-VLAN label and C-VLAN label), can be according to the DEI and/or the PCP of outer layer label, perhaps the PCP of vpn label carries out dropping packets.If single layer label then can only abandon according to the PCP in this label.
Step 33, behind the message that discards discardable sign, judge whether also needs CAR according to the situation of current upstream bandwidth, if upstream bandwidth is still not enough, then still need to be CAR, need decode this moment to the PCP of message, and execution in step 34;
Step 34, according to PCP, abandon according to priority, that is, preferentially abandon the message (to the formation of a plurality of priority packets is arranged) or the random drop (to having only the formation of a priority packet) of low priority.
In the specific implementation process of the embodiment of the invention, when carrying out access rate restriction operation, also can be in the following order: lowest priority the message that preferentially abandons sign arranged, the nothing of lowest priority preferentially abandons the message of sign, a high priority the message that preferentially abandons sign arranged, the nothing of a high priority preferentially abandons the message of sign ... .., till bandwidth meets the demands.
In the specific implementation process of the embodiment of the invention, can PCP not decoded yet, directly, begin dropping packets from lowest priority, till satisfying bandwidth requirement according to the priority indication (PCP behind this coding combines PCP priority and DEI) of the PCP behind the coding.
Below the described optical network unit of the embodiment of the invention is elaborated.
As shown in Figure 4, the described optical network unit of the embodiment of the invention comprises:
Ethernet quality of service configuration data management entity set-up module, be used for creating Ethernet quality of service configuration data management entity according to the request of optical line terminal, described Ethernet quality of service configuration data management entity is used to organize the QoS parameter of realizing Ethernet service quality, and described QoS parameter specifically comprises: the DEI configuration of S-VLAN label, DEI configuration, PCP coding schedule and the PCP decoding table of C-VLAN label.
The Ethernet bridge connection module, according to the QoS parameter of described Ethernet quality of service configuration data management module configuration, what message was set preferentially abandons parameter, and the described parameter that preferentially abandons comprises PCP and DEI, the specific implementation process is existing detailed description the in detail in said method, repeats no more herein.
Ethernet transmission convergence layer processing module is carried out access rate restriction operation according to the described parameter that preferentially abandons to message, and the specific implementation process is existing detailed description the in detail in said method, repeats no more herein.
Described Ethernet transmission convergence layer processing module is arranged among following apparatus one or more, optical network unit, optical line terminal, convergence-level equipment, promptly, optical network unit receives the Ethernet message from user side, and carry out access rate restriction operation according to the described parameter that preferentially abandons, when described message is up to optical line terminal by the light network unit, if take place congested, described optical line terminal also can carry out access rate restriction operation to message according to the described parameter that preferentially abandons, in like manner, when described message is up to convergence-level equipment by optical line terminal, if taking place, congested described optical line terminal also can carry out access rate restriction operation to message according to the described parameter that preferentially abandons, certainly, described convergence-level equipment and optical line terminal also can be same equipment, and promptly optical line terminal also can serve as convergence-level equipment.
Below the described optical line terminal equipment of the embodiment of the invention is elaborated.
As shown in Figure 5, the described optical line terminal equipment of the embodiment of the invention specifically comprises:
Ethernet Service Quality Management request sending module, when realizing Ethernet service, described Ethernet Service Quality Management request sending module sends the solicited message of establishment Ethernet quality of service configuration data management entity to the optical network unit of realizing described Ethernet service;
Ethernet quality of service data sending module, the solicited message that described optical network unit sends according to Ethernet quality of service request sending module, create Ethernet quality of service configuration data management entity, after described Ethernet quality of service configuration data management entity set-up success, described Ethernet quality of service data sending module sends data to described Ethernet quality of service configuration data management entity, and described Ethernet quality of service configuration data management entity is according to described data configuration QoS parameter.
Below the described system of the embodiment of the invention is elaborated.
As described in Figure 6, the described system of the embodiment of the invention specifically comprises:
Optical line terminal, when optical network unit after described optical line terminal is registered, the described optical network unit of described optical line terminal request is created Ethernet quality of service configuration data management module, and to optical network unit QoS parameter is set by described Ethernet quality of service configuration data management module;
Optical network unit, pass through the QoS parameter of Ethernet quality of service configuration data management module according to described optical line terminal to its configuration, the message that user side is sent is provided with and preferentially abandons parameter, and carries out message access rate restriction operation according to the described parameter that preferentially abandons.
Above-mentionedly only be operating as example the described Ethernet Service Quality Management of the embodiment of the invention is illustrated message is carried out access rate restriction, but those skilled in the art will be appreciated that, described Ethernet Service Quality Management not only comprises access rate restriction operation, also comprise other Ethernet Service Quality Management operation, such as, port speed constraints etc., these all are the technology contents that those skilled in the art know, and just repeat no more herein.
So far, the technical scheme that is provided by the invention described above embodiment as can be seen, the embodiment of the invention provides method, the Apparatus and system of realizing Ethernet service quality in a kind of optical network unit, in the embodiment of the invention, by increasing an Ethernet quality of service configuration data management entity, in the optical network unit of GPON, realize Ethernet service quality thereby reach.
The above; it only is the preferable embodiment of the embodiment of the invention; but the protection range of the embodiment of the invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the invention discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the embodiment of the invention.Therefore, the protection range of the embodiment of the invention should be as the criterion with the protection range of claim.
Claims (8)
1. realize the method for Ethernet service quality in the optical network unit, it is characterized in that, comprising:
According to the request of optical line terminal, create Ethernet quality of service configuration data management entity;
After the described Ethernet quality of service configuration data management entity set-up success, utilization comes from the data of optical line terminal, by described Ethernet quality of service configuration data management entity QoS parameter is set, the described QoS parameter that is provided with comprises: the configuration of the discardable sign of professional virtual local area network tags, the configuration of the discardable sign of user's virtual local area network tags, message priority territory coding schedule, message priority territory decoding table;
According to described QoS parameter configuration message preferentially abandon parameter, the parameter that preferentially abandons of described message comprises: discardable sign and/or message priority territory;
Carry out the Ethernet Service Quality Management according to the described parameter that preferentially abandons, described Ethernet Service Quality Management comprises: the access rate restriction.
2. method according to claim 1 is characterized in that, the described step that preferentially abandons parameter that message is set according to described QoS parameter comprises:
Priority of messages and discardable sign are set;
Encode according to priority of messages and discardable sign, generate the message priority territory.
3. method according to claim 1 is characterized in that, describedly according to the described parameter that preferentially abandons the step that message carries out the Ethernet Service Quality Management is comprised:
Judge whether to carry out the Ethernet Service Quality Management, when determining to carry out the Ethernet Service Quality Management, preferentially abandon the message of discardable sign;
Judge whether also to need to carry out the Ethernet Service Quality Management, when determining to carry out the Ethernet Service Quality Management,, preferentially abandon the message or the random drop message of low priority according to priority of messages in the message priority territory.
4. an optical network unit of realizing the Ethernet Service Quality Management is characterized in that, comprising:
Ethernet quality of service configuration data management entity set-up module is used for creating Ethernet quality of service configuration data management entity according to the request of optical line terminal;
The ethernet bridging mould is determined, be used for QoS parameter according to described Ethernet quality of service configuration data management physical arrangements, what message was set preferentially abandons parameter, described configuration service mass parameter comprises: the configuration of the discardable sign of professional virtual local area network tags, the configuration of the discardable sign of user's virtual local area network tags, message priority territory coding schedule, message priority territory decoding table; The parameter that preferentially abandons of described message comprises: discardable sign and/or message priority territory;
Ethernet transmission convergence layer processing module is used for according to the described parameter that preferentially abandons message being carried out the Ethernet Service Quality Management, and described Ethernet Service Quality Management comprises: the access rate restriction.
5. an optical line terminal equipment of realizing the Ethernet Service Quality Management is characterized in that, comprising:
Ethernet Service Quality Management request sending module is used to send the solicited message of establishment Ethernet quality of service configuration data management entity to optical network unit;
Ethernet quality of service data sending module, after described Ethernet quality of service configuration data management entity set-up success, described Ethernet quality of service data sending module sends and is used for the data of configuration service mass parameter to described Ethernet quality of service configuration data management entity;
Described configuration service mass parameter comprises: the configuration of the discardable sign of professional virtual local area network tags, the configuration of the discardable sign of user's virtual local area network tags, message priority territory coding schedule, message priority territory decoding table;
Described Ethernet Service Quality Management comprises: the access rate restriction.
6. a system that realizes Ethernet service quality in optical network unit is characterized in that, comprises optical line terminal and optical network unit, wherein:
Optical line terminal comprises:
Ethernet Service Quality Management request sending module is used to send the solicited message of establishment Ethernet quality of service configuration data management entity to optical network unit;
Ethernet quality of service data sending module, after described Ethernet quality of service configuration data management entity set-up success, described Ethernet quality of service data sending module sends and is used for the data of configuration service mass parameter to described Ethernet quality of service configuration data management entity;
Described configuration service mass parameter comprises: the configuration of the discardable sign of professional virtual local area network tags, the configuration of the discardable sign of user's virtual local area network tags, message priority territory coding schedule, message priority territory decoding table;
Described Ethernet Service Quality Management comprises: the access rate restriction;
Optical network unit comprises:
Ethernet quality of service configuration data management entity set-up module is used for creating Ethernet quality of service configuration data management entity according to the request of optical line terminal;
The Ethernet bridge connection module, be used for QoS parameter according to described Ethernet quality of service configuration data management physical arrangements, what message was set preferentially abandons parameter, described configuration service mass parameter comprises: the configuration of the discardable sign of professional virtual local area network tags, the configuration of the discardable sign of user's virtual local area network tags, message priority territory coding schedule, message priority territory decoding table; The parameter that preferentially abandons of described message comprises: discardable sign and/or message priority territory;
Ethernet transmission convergence layer processing module is used for according to the described parameter that preferentially abandons message being carried out the Ethernet Service Quality Management.
7. system according to claim 6 is characterized in that, takes place when congested when message is up to optical line terminal, and described optical line terminal also is used for carrying out the Ethernet Service Quality Management according to the described parameter that preferentially abandons.
8. according to claim 6 or 7 described systems, it is characterized in that described system also comprises:
Convergence-level equipment takes place when congested when message is up to convergence-level equipment, and described convergence-level is used for according to the described parameter that preferentially abandons message being carried out the Ethernet Service Quality Management.
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| CN1685661A (en) * | 2002-09-26 | 2005-10-19 | 思科技术公司 | Per user per service traffic provisioning |
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