CN101146050B - Frame relaying packet transmission method and device - Google Patents
Frame relaying packet transmission method and device Download PDFInfo
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- CN101146050B CN101146050B CN2007101768742A CN200710176874A CN101146050B CN 101146050 B CN101146050 B CN 101146050B CN 2007101768742 A CN2007101768742 A CN 2007101768742A CN 200710176874 A CN200710176874 A CN 200710176874A CN 101146050 B CN101146050 B CN 101146050B
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Abstract
The invention discloses a frame relay message transmission method, which includes: frame relay message delivery equipment sets up a service quality guarantee mark in the frame relay message of a designated business and sends out the frame delay message; if frame relay switch equipment resolves the service quality guarantee mark in the received frame relay message in congestion, execute the processing of the frame relay message delivery. The invention also discloses the frame relay message delivery equipment and the frame relay switch equipment. The technical proposal of the invention can prevent the designated frame relay message from being discarded in congestion.
Description
Technical field
The present invention relates to the frame relay technology field, refer to a kind of transmission method of frame relay message, a kind of frame relay message transmitting apparatus and a kind of frame relay switch equipment especially.
Background technology
Frame relay (Frame Relay) technology is mainly used in transmitting data service, and it uses the frame of variable-length to transmit data.The frame relay exchange is a kind of two layers of exchange, when a port of the switch router of frame-relay network receives message, this switch router is according to the swap table of self current configuration, find outgoing interface and go out PVC (PVC, Permanent Virtual Circuit), then message is sent.Specific efficiency is higher mutually with common IP pass-through mode for this exchanged form, and each exchange only needs analysis frame relay messages head, pastes heading again and just can send.
But, in existing frame relay exchange process, the content in the heading of a switching equipment parse for frame relay messages, and the payload content of analytic message not, so the dissimilar message to upper layer application all carries out same exchange processing, can not carry out different processing at different messages.Therefore, when the exchange generation was congested, any message that exchanges all might be dropped.Yet the frame relay message for some specific transactions should not be dropped.
Fig. 1 is that scene schematic diagram when congested takes place the frame relay switching network in the prior art.In this scene, with frame relay InARP message end to end is that example describes, as shown in Figure 1, router-A is connected with frame-relay network 2 with frame-relay network 1 respectively with router B, and above-mentioned two frame-relay networks connect communication by frame relay switch router (Switch Router).Disposed traffic shaping on the port that communicates with frame-relay network 1 of frame relay switch router, currently there is flow to the direction of router-A at router B, and flow is greater than the transmission rate of the traffic shaping defined that disposes on the frame relay switch router, and the port that communicates with frame-relay network 1 that causes the frame relay switch router occurs congested.At this moment, if router-A has sent a frame relay InARP request message to router B, router B has returned a frame relay InARP response message, when this frame relay InARP response message arrival frame relay switch router exchanges, because it is congested that the outbound port of frame relay switch router has occurred, and causes this frame relay InARP response message to be dropped.
In sum, in existing frame-relay switching, when appearance was congested, the frame relay message of some important service also can be dropped, and caused some important service to be interrupted.
Summary of the invention
The invention provides a kind of frame relay message transmitting method, this method makes the frame relay message of specified services can not be dropped when generation is congested.
The invention provides a kind of frame relay message transmitting apparatus, this equipment makes the frame relay message of specified services can not be dropped when generation is congested.
The present invention also provides a kind of frame relay switch equipment, and this frame relay switch equipment can not abandon the frame relay message of specified services when generation is congested.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
The invention discloses a kind of frame relay message transmitting method, this method comprises:
The a plurality of urgent message queue of different priorities is set in frame relay switch equipment;
Frame relay message transmitting apparatus is provided with service quality assurance sign in the frame relay message of specified services after, in described frame relay message, in the forward explicit congestion notification position of heading and/or the reverse ecn (explicit congestion notification) position priority tag is set, sends this frame relay message;
When appearance is congested, if frame relay switch equipment parses service quality and guarantees sign from the frame relay message that is received, then from the frame relay message, resolve priority tag in the forward explicit congestion notification position of heading and/or the reverse ecn (explicit congestion notification) position, described frame relay message is put into the urgent message queue corresponding with described priority tag; According to the priority of each urgent message queue, send the frame relay message in each urgent message queue.
A kind of frame relay message transmitting apparatus, described frame relay message transmitting apparatus is applied to comprise in the transmission system of frame relay message transmitting apparatus and frame relay switch equipment, this frame relay switch equipment comprises: parsing module and exchange processing module, wherein, parsing module, be used for when appearance is congested, resolve the frame relay message that is received, and when from institute's received frame relay messages, parsing service quality assurance sign, further from this frame relay message, parse priority tag in the forward explicit congestion notification position of heading and/or the reverse ecn (explicit congestion notification) position, and the priority tag that parses is guaranteed that with described service quality sign sends to exchange processing module together; Exchange processing module, comprise a plurality of urgent message queue of different priorities, be used for when the service quality that receives the parsing module transmission guarantees sign and priority tag, described frame relay message is put into the urgent message queue corresponding with described priority tag, and send frame relay message in each urgent message queue according to priority-level; This frame relay message transmitting apparatus comprises that sign is provided with module and sending module, wherein,
Sign is provided with module, be used for after the frame relay message of specified services is provided with service quality assurance sign, in described frame relay message, in the forward explicit congestion notification position of heading and/or the reverse ecn (explicit congestion notification) position priority tag is set, sends this frame relay message to sending module;
Sending module is used for the frame relay message that tagging in the future is provided with module and sends.
The invention also discloses a kind of frame relay switch equipment, described frame relay switch equipment is applied to comprise in the transmission system of frame relay message transmitting apparatus and frame relay switch equipment, this frame relay message transmitting apparatus comprises that sign is provided with module and sending module, wherein, sign is provided with module, be used for after the frame relay message of specified services is provided with service quality assurance sign, in described frame relay message, in the forward explicit congestion notification position of heading and/or the reverse ecn (explicit congestion notification) position priority tag is set, sends this frame relay message to sending module; Sending module is used for the frame relay message that tagging in the future is provided with module and sends; This frame relay switch equipment comprises: parsing module and exchange processing module, wherein,
Parsing module, be used for when appearance is congested, resolve the frame relay message that is received, and when from the heading of institute's received frame relay messages, parsing service quality assurance sign, further from this frame relay message, parse priority tag in the forward explicit congestion notification position of heading and/or the reverse ecn (explicit congestion notification) position, and the priority tag that parses is guaranteed that with described service quality sign sends to exchange processing module together;
Exchange processing module, comprise a plurality of urgent message queue of different priorities, be used for when the service quality that receives the parsing module transmission guarantees sign and priority tag, described frame relay message is put into the urgent message queue corresponding with described priority tag, and send frame relay message in each urgent message queue according to priority-level.
As seen from the above technical solution, this service quality that is provided with in the frame relay heading of the embodiment of the invention guarantees sign; When occurring when congested, frame relay switch equipment guarantees sign according to the service quality in the described frame relay heading, and this frame relay message is exchanged the technical scheme of processing, makes the frame relay message of some appointments can not be dropped when congested taking place.
Description of drawings
Fig. 1 is that scene schematic diagram when congested takes place the frame relay switching network in the prior art;
Fig. 2 is the flow chart of a kind of frame relay message transmitting method of the embodiment of the invention;
Fig. 3 is the structure chart of frame relay message in the prior art;
Fig. 4 is the structured flowchart of a kind of frame relay message of embodiment of the invention transmitting apparatus;
Fig. 5 is the structured flowchart of a kind of frame relay switch equipment of the embodiment of the invention.
Embodiment
Fig. 2 is the flow chart of a kind of frame relay message transmitting method of the embodiment of the invention.As shown in Figure 1, may further comprise the steps:
In this step, the frame relay message of described specified services can for example be specified the frame relay message of some business with important application etc. according to the real needs appointment.
In this step, can in frame relay switch equipment, set in advance urgent message queue in advance.Frame relay switch equipment is put into the urgent message queue of self with this frame relay message, and is preferentially sent the message in the urgent message queue parse service quality assurance sign from the frame relay message after.
For making purpose of the present invention, technical scheme and advantage clearer, below enumerate preferred embodiment, the present invention is described in more detail.And,, provide the structure chart of frame relay message in the prior art here earlier in order more clearly to describe embodiments of the invention.
Fig. 3 is the structure chart of frame relay message in the prior art.In Fig. 3, the implication of each field in the header field of frame relay message is as follows:
DLCI:Date Link Connection Identifier data link connection identifier;
The C/R:Command/Response command;
FECN:Forward Explicit Congestion Notification forward explicit congestion notification;
The reverse ecn (explicit congestion notification) of BECN:Backward Explicit Congestion Notification;
DE:Discard Eligibility Indicator abandons indication;
EA:Extension Bit: extended bit.
In the prior art, the C/R position in the frame relay heading also is not used, and acquiescence all is arranged to 0.Therefore, in embodiments of the present invention, utilize the C/R position in the frame relay heading that service quality assurance sign is set.For example, C/R=1 is set, then expression is provided with service quality and guarantees sign; Otherwise, C/R=0, then expression is not provided with the service quality sign.When occurring when congested, frame relay switch equipment is resolved the C/R position of institute's received frame relay messages, if C/R=1 then puts into this frame relay message self the urgent message queue that sets in advance.Guarantee the sign except service quality is set with the C/R position, can also be provided with other position, for example the EA position.Frame relay switch equipment is under congested situation, and the message in the urgent message queue of priority scheduling can preferentially be sent to guarantee these messages.
In order further to distinguish frame relay priority of messages grade, in the embodiment of the invention, also in the frame relay heading, priority tag is set, the different value of priority tag is represented the different priorities grade of frame relay message.For example, but the priority tag value is 0,1 or 2, and wherein, the priority tag value is that 0 o'clock priority is the highest, and the priority tag value is that 2 o'clock priority is minimum etc.At this moment, need in frame relay switch equipment, other the urgent message queue of different priorities level correspondingly be set the value according to priority tag.For example, when priority tag is got 0,1 and 2 three above-mentioned value, other the urgent message queue of three levels need be set correspondingly in frame relay switch equipment.When generation is congested, whether the quality assurance sign that frame relay switch equipment is resolved in institute's received frame relay messages head is effective, be then further to resolve this frame relay priority of messages sign, and, this frame relay message put into corresponding urgent message queue according to the value of priority tag.Message in the high urgent message queue of frame relay switch equipment priority scheduling rank.
Take place when congested, the mode of the message in each the urgent message queue of frame relay switch equipment degrees of coordination has multiple, is example there to be rank to be respectively 0,1 and 2 urgent message queue in the frame relay switch equipment below, introduces two kinds of coordinated scheduling modes.
Mode one: frame relay switch equipment is dispatched message in each urgent message queue from high to low successively according to priority-level, and when being empty, just begins to dispatch the message in other the urgent message queue of its next stage in each urgent message queue.For example, frame relay switch equipment earlier scheduling rank is a message in 0 the urgent message queue, up to rank is 0 urgent message queue when empty, dispatch rank again and be the message in 1 the urgent message queue, up to rank is 1 urgent message queue when empty, dispatches rank again and be the message in 2 the urgent message queue.
Mode two: frame relay switch equipment is according to priority-level each urgent message queue of polling dispatching successively from high to low, and from the message number of each urgent message queue scheduling, successively decreases successively from high to low with priority-level.For example, frame relay switch equipment is that 4 messages of scheduling send 0 the urgent message queue from rank successively, from rank is that 3 messages of scheduling send 1 the urgent message queue, from rank is that 2 messages of scheduling send 2 the urgent message queue, repeat said process then, the dispatching message in urgent message row finishes.
In embodiments of the present invention, utilize FECN position and/or becn bit in the frame relay heading that priority tag is set.If utilize in FECN position and the becn bit wherein one priority tag is set owing to have only 1 bit, therefore can only represent the priority of two grades; If utilize FECN position and becn bit that priority tag is set jointly, then, therefore can represent the priority of four grades because 2 bits are arranged.Be that example describes the process that the present invention solves the problem that occurs among Fig. 1 below with the latter.
Referring to Fig. 1, after router B receives the InARP request message of router-A, before returning frame relay InARP response message, C/R position in the InARP response message head is set to 1, to represent that this InARP response message needs service quality to guarantee, and FECN position and becn bit in the InARP response message head be set to 0, is 0 with the priority-level of representing this InARP response message.After the frame relay switch router receives the InARP response message, because current outbound port of communicating by letter with frame-relay network 1 is congested, the C/R position in the frame relay switch router analytic message head then, find C/R=1, know that this InARP response message needs service quality to guarantee, continue to resolve FECN position and becn bit then, find that FECN position and becn bit all are 0, the rank of then this InARP message being put into self is 0 urgent message queue wait scheduling.If also have other frame relay switch equipment in the link between router-A and the router B, then this frame relay switch equipment is also carried out above-mentioned identical operations to the InARP response message.In embodiments of the present invention, each frame relay switch equipment of InARP response message process is 1 message for the C/R position, can not go to revise the value of its C/R position, FECN position and becn bit.Therefore, the information of the C/R position in the InARP response message and FECN position and becn bit can be handled by one tunnel indication frame relay switch equipment accordingly.Guaranteed that so just the InARP response message can not be dropped end to end, finally can arrive router-A.
InARP response message in above-mentioned example carries out service quality and guarantees being provided with of sign, other is as frame relay FRF.9 compression negotiation message, also can be set to 1 in its C/R position, and FECN position and becn bit are set to 0 and 1 respectively, be 1 to represent this priority of messages.After the frame relay switch router receives this frame relay FRF.9 compression negotiation message, if occurred congested can not send this message the time at that time, resolve C/R position and the FECN position and the becn bit of this message, and be 1 urgent message queue according to the rank that the result who resolves puts into self with this message.
Need explanation to be, in the above-described embodiments, if the C/R position of frame relay message transmitting apparatus frame relay message is set to 1, show that then FECN position and becn bit change meaning, its implication no longer is original forward explicit congestion notification and reverse ecn (explicit congestion notification), but priority tag.At this moment, frame relay switch equipment no longer carries out the operation of congestion management, and promptly frame relay switch equipment can not be provided with the FECN and the becn bit of frame relay message again.
Based on the foregoing description, next provide the structure of the embodiment of the invention a kind of frame relay message transmitting apparatus and a kind of frame relay switch equipment.
Fig. 4 is the structured flowchart of a kind of frame relay message of embodiment of the invention transmitting apparatus.As shown in Figure 4, this frame relay message transmitting apparatus comprises: sign is provided with module 401 and sending module 402.
Sign is provided with module 401, is used for sending this frame relay message to sending module 402 after the frame relay message of specified services is provided with service quality assurance sign.
In Fig. 4, sign is provided with module 401, after can also being further used in the frame relay message of described specified services priority tag being set, sends this frame relay message again to sending module 402.
Fig. 5 is the structured flowchart of a kind of frame relay switch equipment of the embodiment of the invention.As shown in Figure 5, this frame relay switch equipment comprises: parsing module 501 and exchange processing module 502.
In Fig. 5, parsing module 501 is used for occurring resolving the frame relay message that is received when congested, and parsing service quality when guaranteeing sign from institute's received frame relay messages, this service quality is guaranteed that sign sends to exchange processing module 502;
In Fig. 5, exchange processing module 502 comprises urgent message queue; When exchange processing module 502 guarantees sign in the service quality that receives parsing module 501 transmissions, described frame relay message is put into urgent message queue, and send the message in the urgent message queue.
In Fig. 5, parsing module 501, after from institute's received frame relay messages, parsing service quality assurance sign, can also be further used for from this frame relay message, parsing priority tag, and the priority tag that parses is guaranteed that with described service quality sign sends to exchange processing module 502 together; Described urgent message queue is made up of a plurality of urgent message queue of different priorities; When exchange processing module 502 guarantees sign and priority tag in the service quality that receives the parsing module transmission, described frame relay message is put into the urgent message queue corresponding with described priority tag, and send message in each urgent message queue according to priority-level.
In sum, this service quality that is provided with in the frame relay heading of the embodiment of the invention guarantees sign; When appearance is congested, frame relay switch equipment guarantees sign according to the service quality in the described frame relay heading, this frame relay message is exchanged the technical scheme of processing, make the frame relay message with important application of some appointments can not be dropped when congested taking place.And, further in the frame relay message, priority tag is set, when appearance is congested, frame relay switch equipment guarantees sign and priority tag according to the service quality in the described frame relay heading, this frame relay message is exchanged the technical scheme of processing, make it possible to further distinguish frame relay priority of messages grade with important application.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a frame relay message transmitting method is characterized in that, this method comprises:
The a plurality of urgent message queue of different priorities is set in frame relay switch equipment;
Frame relay message transmitting apparatus is provided with service quality assurance sign in the frame relay message of specified services after, in described frame relay message, in the forward explicit congestion notification position of heading and/or the reverse ecn (explicit congestion notification) position priority tag is set, sends this frame relay message;
When appearance is congested, if frame relay switch equipment parses service quality and guarantees sign from the frame relay message that is received, then from the frame relay message, resolve priority tag in the forward explicit congestion notification position of heading and/or the reverse ecn (explicit congestion notification) position, described frame relay message is put into the urgent message queue corresponding with described priority tag; According to the priority of each urgent message queue, send the frame relay message in each urgent message queue.
2. the method for claim 1 is characterized in that, the described service quality that is provided with in the frame relay message of specified services guarantees that the step that identifies comprises: the command position of heading is set to predetermined value in the frame relay message of specified services;
The described service quality that parses from the frame relay message that is received guarantees sign, is that the command position of heading from the frame relay message parses described predetermined value.
3. the method for claim 1 is characterized in that, described priority according to each urgent message queue, and the frame relay message that sends in each urgent message queue comprises:
Frame relay switch equipment is dispatched frame relay message in each urgent message queue from high to low successively according to priority-level, and when being empty, just begins to dispatch the frame relay message in other the urgent message queue of its next stage in each urgent message queue; Perhaps
Frame relay switch equipment is according to priority-level each urgent message queue of polling dispatching successively from high to low, and from the message number that each urgent message queue sends out, successively decreases successively from high to low with priority-level.
4. frame relay message transmitting apparatus, described frame relay message transmitting apparatus is applied to comprise in the transmission system of frame relay message transmitting apparatus and frame relay switch equipment, this frame relay switch equipment comprises: parsing module and exchange processing module, wherein, parsing module, be used for when appearance is congested, resolve the frame relay message that is received, and when from institute's received frame relay messages, parsing service quality assurance sign, further from this frame relay message, parse priority tag in the forward explicit congestion notification position of heading and/or the reverse ecn (explicit congestion notification) position, and the priority tag that parses is guaranteed that with described service quality sign sends to exchange processing module together; Exchange processing module, comprise a plurality of urgent message queue of different priorities, be used for when the service quality that receives the parsing module transmission guarantees sign and priority tag, described frame relay message is put into the urgent message queue corresponding with described priority tag, and send frame relay message in each urgent message queue according to priority-level; It is characterized in that this frame relay message transmitting apparatus comprises that sign is provided with module and sending module, wherein,
Sign is provided with module, be used for after the frame relay message of specified services is provided with service quality assurance sign, in described frame relay message, in the forward explicit congestion notification position of heading and/or the reverse ecn (explicit congestion notification) position priority tag is set, sends this frame relay message to sending module;
Sending module is used for the frame relay message that tagging in the future is provided with module and sends.
5. frame relay switch equipment, described frame relay switch equipment is applied to comprise in the transmission system of frame relay message transmitting apparatus and frame relay switch equipment, this frame relay message transmitting apparatus comprises that sign is provided with module and sending module, wherein, sign is provided with module, be used for after the frame relay message of specified services is provided with service quality assurance sign, in described frame relay message, in the forward explicit congestion notification position of heading and/or the reverse ecn (explicit congestion notification) position priority tag is set, sends this frame relay message to sending module; Sending module is used for the frame relay message that tagging in the future is provided with module and sends; It is characterized in that this frame relay switch equipment comprises: parsing module and exchange processing module, wherein,
Parsing module, be used for when appearance is congested, resolve the frame relay message that is received, and when from institute's received frame relay messages, parsing service quality assurance sign, further from this frame relay message, parse priority tag in the forward explicit congestion notification position of heading and/or the reverse ecn (explicit congestion notification) position, and the priority tag that parses is guaranteed that with described service quality sign sends to exchange processing module together;
Exchange processing module, comprise a plurality of urgent message queue of different priorities, be used for when the service quality that receives the parsing module transmission guarantees sign and priority tag, described frame relay message is put into the urgent message queue corresponding with described priority tag, and send frame relay message in each urgent message queue according to priority-level.
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| CN2007101768742A CN101146050B (en) | 2007-11-06 | 2007-11-06 | Frame relaying packet transmission method and device |
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| CN2007101768742A CN101146050B (en) | 2007-11-06 | 2007-11-06 | Frame relaying packet transmission method and device |
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| CN101925127A (en) * | 2009-06-09 | 2010-12-22 | 中兴通讯股份有限公司 | Method and device for dispatching mobile station (MS) access by relay station (RS) |
| CN103582009B (en) * | 2012-07-19 | 2017-02-08 | 华为技术有限公司 | Data transmission method, host base station and data network system |
| EP2888842A4 (en) * | 2012-08-21 | 2016-03-09 | Hewlett Packard Development Co | Congestion notification in a network |
| CN103312807B (en) * | 2013-06-20 | 2016-12-28 | 华为技术有限公司 | Data transmission method, apparatus and system |
| CN104836743B (en) * | 2015-05-25 | 2018-09-04 | 新华三技术有限公司 | A kind of jamming control method and device |
| CN108667739B (en) * | 2017-03-27 | 2020-12-08 | 华为技术有限公司 | Congestion control method, device and system |
| CN109327402B (en) * | 2017-07-31 | 2023-03-14 | 杭州海康威视数字技术股份有限公司 | Congestion management method and device |
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| CN1739101A (en) * | 2001-12-15 | 2006-02-22 | 汤姆森许可公司 | System and method for delivering data streams of multiple data types at diffferent priority levels |
| CN1868180A (en) * | 2003-10-14 | 2006-11-22 | 泰勒比斯股份公司 | Method and equipment for controlling the congestion management and scheduling of transmission-link capacity in packet-switched telecommunications |
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| CN1739101A (en) * | 2001-12-15 | 2006-02-22 | 汤姆森许可公司 | System and method for delivering data streams of multiple data types at diffferent priority levels |
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Address after: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Patentee after: Xinhua three Technology Co., Ltd. Address before: 310053 Hangzhou hi tech Industrial Development Zone, Zhejiang province science and Technology Industrial Park, No. 310 and No. six road, HUAWEI, Hangzhou production base Patentee before: Huasan Communication Technology Co., Ltd. |
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Granted publication date: 20110323 Termination date: 20191106 |