CN101257441A - Method, equipment and system for forwarding message as well as equipment for receiving message - Google Patents
Method, equipment and system for forwarding message as well as equipment for receiving message Download PDFInfo
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- CN101257441A CN101257441A CNA2008100076005A CN200810007600A CN101257441A CN 101257441 A CN101257441 A CN 101257441A CN A2008100076005 A CNA2008100076005 A CN A2008100076005A CN 200810007600 A CN200810007600 A CN 200810007600A CN 101257441 A CN101257441 A CN 101257441A
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Abstract
The invention discloses method, device, system for transferring message and a device for receiving message, belonging to the communication technology art. The method comprises: receiving message; obtaining at least one message by copying the message; and transferring the received message and the copied message to a receiving end PE by presetting at least two pseudowires from a plurality of pseudowires, according to the principle that each pseudowire only transfers one message. The transferring device includes: a receiving module and a transferring module. The receiving device comprises: a receiving module and a processing module; or receiving module, a recombining module and a processing module. The system contains a sending end equipment and a receiving end equipment. Due to the plurality of pseudowires simultaneously bears the user traffic, when any link goes wrong, the other links can continuously transfer the traffic to protect the links and avoid the situation of user traffic lost in the transferring and failback process caused by protecting the links using a backup link, thereby, the invention can provide higher level reliability assurance.
Description
Technical field
The present invention relates to communication technical field, the equipment of particularly a kind of method that E-Packets, equipment, system and reception message.
Background technology
MPLS (Multi-protocol Label Switch, multiprotocol label switching) L2VPN (Layer 2 Virtual PrivateNetworks, Layer 2 virtual private network) provides two-layer VPN service, realize the transparent transmission of user data in the MPLS network by label stack based on the MPLS network.Fig. 1 is the MPLS L2VPN schematic diagram that E-Packets in the prior art, referring to Fig. 1, in MPLS L2VPN message repeating process, CE (Customer Edge, customer network edge) 1 equipment sends to PE (Provider Edge with user data, the carrier network edge) 1 equipment, PE1 increases vpn label V earlier before user data (be private network tags, in MPLS L2VPN, be called the VC label), and then increase outer layer label T (being public network label Tunnel), send to P (Provider Device, carrier network devices) then.Wherein, vpn label is used for identifying this message and mails to which user private network equipment, and outer layer label is used for being identified to next jumping of user private network equipment.P receives behind the message outer layer label T replaced with and message is transmitted to next behind the T ' and jumps PE2 that PE2 receives that the back sends to CE2 according to vpn label with message.
Use FRR (Fast Reroute, heavy-route fast) technology to carry out link protection in the prior art, it carries out link switchover fast by disposing protection link and fault detect means fast.Communication equipment is gone up the operation troubles detection protocol at every link (comprising active link and protection link); as BFD (Bidirectional Forwarding Detection; two-way forwarding detects) agreement or OAM (Operations Administration and Maintenance; Operations,Administration And Maintenance) agreement; detect link by the timing fault detection mechanism and whether break down, and when link occurs fault, start the flow switching.Regularly send a detection messages as local terminal to the opposite end; the opposite end starts a detection timer; when this detection timer expiry and when not receiving the detection messages that local terminal sends yet; then think link occurs fault between local terminal and the opposite end; therefore upgrade route or forwarding information, flow is switched on the protection link from active link.
For example; referring to Fig. 2; Fig. 2 is by setting up the schematic diagram that many PW carry out link protection in the prior art; between PE1 and PE2, set up three PW (Pseudo Wire; pseudo-line) carries out the protection of link; be respectively PW1, PW2 and PW3, wherein having only a PW link is the forwarding that active link is used to carry out actual customer flow, as PW1.When PE1 detects active link PW1 and breaks down by the timing fault detection mechanism, customer flow is switched on reserve link PW2 or the PW3, customer flow is not interrupted, thereby improve the reliability of link.Behind the PW1 link failure recovery, PE1 also can return customer flow to switch on the PW1 and transmit according to predetermined strategy.
In realizing process of the present invention, the inventor finds that above-mentioned prior art has following shortcoming at least:
Owing to adopt timing mechanism, have only timing then, whether just can detect link breaks down, therefore faulty link can not in time be found, when link occurs fault but communication equipment when also not detecting, user's message is still transmitted by original path, and promptly user's message can be sent on the faulty link, and then user's message can be dropped at the malfunctioning node place.For example, communication equipment is used the BFD agreement and is carried out link detecting, and timing is T=5 second, detecting the time started is 1000, and in 1001 moment link occurs fault, communication equipment is when 1005 reach constantly, find not receive the detection messages that send the opposite end, then think to start link failure and switch.But the message that communication equipment sends between 1001 to 1005 moment switches owing to also start, so still can send to faulty link, causes user's message to lose.
Summary of the invention
Message dropping when preventing link occurs fault, the embodiment of the invention provides the equipment of a kind of method that E-Packets, equipment, system and reception message.Described technical scheme is as follows:
On the one hand, the embodiment of the invention provides a kind of method that E-Packets, and described method comprises:
Receive message;
Duplicate described message and obtain at least one message;
By at least two pseudo-lines in the many pseudo-lines of setting up in advance, transmit the principle of a message according to every pseudo-line, transmits the described message that receives and duplicate described at least one message of obtaining to receiving terminal carrier network edge device PE.
On the other hand, the embodiment of the invention also provides a kind of equipment that E-Packets, and described equipment comprises:
Receiver module is used to receive message;
Forwarding module, be used to duplicate the message that described receiver module receives and obtain at least one message, by at least two pseudo-lines in the many pseudo-lines of setting up in advance, transmit the principle of a message according to every pseudo-line, transmits the described message that receives and duplicate described at least one message of obtaining to receiving terminal PE.
On the other hand, the embodiment of the invention also provides a kind of equipment that receives message, and described equipment comprises:
Receiver module is used to receive message, and described message is that transmitting terminal PE sends by two pseudo-lines in the many pseudo-lines of setting up in advance at least;
Processing module is used to judge whether the message that described receiver module receives is the message of repetition, if then abandon described message.
On the other hand, the embodiment of the invention also provides a kind of equipment that receives message, and described equipment comprises:
Receiver module is used to receive fragment message, and described fragment message is that transmitting terminal PE sends by two pseudo-lines in the many pseudo-lines of setting up in advance at least;
Recombination module is used for same group a plurality of fragment messages of belonging to that described receiver module is received are recombinated;
Processing module is used to judge whether the message after the described reorganization is the message of repetition, if then abandon the message after the described reorganization.
On the other hand, the embodiment of the invention also provides a kind of system that E-Packets, and described system comprises:
Sending ending equipment, be used for the message that receiving end/sending end CE sends, duplicate described message and obtain at least one message, by at least two pseudo-lines in the many pseudo-lines of setting up in advance, according to the principle of a message of every pseudo-line forwarding, transmit the described message that receives and duplicate described at least one message that obtains;
Receiving device is used to receive the message that described sending ending equipment is transmitted, and judges whether described message is the message of repetition, if then abandon described message.
On the other hand, the embodiment of the invention also provides a kind of system that E-Packets, and described system comprises:
Sending ending equipment is used for the message that receiving end/sending end CE sends, and described message is carried out burst, obtains a plurality of fragment messages; To any fragment message in described a plurality of fragment messages, copy at least one fragment message, and by at least two pseudo-lines in the many pseudo-lines of setting up in advance, according to the principle of a fragment message of every pseudo-line forwarding, transmit described any fragment message and be its fragment message that duplicates;
Receiving device is used to receive the fragment message that described sending ending equipment is sent, and same group a plurality of fragment messages of receiving of belonging to are recombinated, and judges whether the message after the described reorganization is the message of repetition, if then abandon the message after the described reorganization.
The beneficial effect of the technical scheme that the embodiment of the invention provides is:
Carry customer flow simultaneously by many PW; when link occurs fault; other links are little influenced; can continue converting flow; realized link protection; avoided causing providing the reliability guarantee of higher level for user link switching and returning the situation generation of losing customer flow when cutting owing to adopting backup link to protect.Do not need to carry out link switchover, saved the consumption of link failure detection mechanism, saved equipment supplier's equipment R﹠D costs.
Description of drawings
Fig. 1 is the MPLS L2VPN schematic diagram that E-Packets in the prior art;
Fig. 2 is by setting up the schematic diagram that many PW carry out link protection in the prior art;
Fig. 3 is the networking schematic diagram that E-Packets that the embodiment of the invention provides;
Fig. 4 is the method flow diagram that E-Packets that the embodiment of the invention 1 provides;
Fig. 5 is the message format schematic diagram after the interpolation sign that provides of the embodiment of the invention 1;
Fig. 6 is the schematic flow sheet that adds sign back burst earlier that the embodiment of the invention 1 provides;
Fig. 7 is the method flow diagram that E-Packets that the embodiment of the invention 2 provides;
Fig. 8 is the schematic flow sheet that sign is provided behind the first burst that provides of the embodiment of the invention 2;
Fig. 9 is the equipment structure chart that E-Packets that the embodiment of the invention 3 provides;
Figure 10 is the equipment structure chart of the reception message that provides of the embodiment of the invention 4;
Figure 11 is the equipment structure chart of the reception message that provides of the embodiment of the invention 5;
Figure 12 is the system construction drawing that E-Packets that the embodiment of the invention 6 and 7 provides.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
The method that E-Packets that the embodiment of the invention provides specifically comprises: receive message; Duplicate described message and obtain at least one message; By at least two pseudo-lines in the many pseudo-lines of setting up in advance, transmit the principle of a message according to every pseudo-line, transmits the described message that receives and duplicate described at least one message of obtaining to receiving terminal PE.Wherein, the pseudo-line of many pseudo-lines between transmitting terminal PE and receiving terminal PE, setting up.Technical scheme in the embodiment of the invention does not limit the form of networking, be that example is specifically described with the networking among Fig. 3 below, referring to Fig. 3, transmitting terminal CE1 links to each other with transmitting terminal PE1, receiving terminal CE2 links to each other with receiving terminal PE2, has three links that pass through P1, P2 and P3 equipment respectively between PE1 and the PE2, and PE1 sets up three pseudo-line PW1, PW2 and PW3 in advance, pass through above-mentioned three links respectively, constitute a PW protection group; CE1 sends user's message by PE1 and PE2 to CE2.
Embodiment 1
Fig. 4 is the method flow diagram that E-Packets that the embodiment of the invention 1 provides.Referring to Fig. 4, the embodiment of the invention provides a kind of method that E-Packets, and comprising:
101:CE1 sends message to PE1, and this message is a user's message, and destination address is CE2.
102:PE1 receives the message that CE1 sends.
103:PE1 duplicates the message of receiving, obtains at least one message, and this message is identical with the message of reception.The number of common duplicated message is not more than the pseudo-line sum that PE1 sets up in advance with the sum of the number of the message of receiving.The pseudo-line set up between PE1 and PE2 in advance of PE1 has three in the present embodiment, then can duplicate a message, also can duplicate two messages, be that example describes to duplicate two messages below, obtain three identical messages after promptly duplicating altogether, comprising the message of receiving.
104:PE1 transmits above-mentioned three identical messages by three pseudo-lines setting up in advance and gives PE2, and message of every pseudo-line forwarding, transmits the message of receiving as PW1, and PW2 transmits first message that duplicates, and PW3 transmits second message that duplicates.Because the pseudo-line of setting up is many in advance, when E-Packeting, can select at least two pseudo-lines wherein to transmit, if any 10 pseudo-lines, can select wherein 2 pseudo-lines or 5 pseudo-lines to E-Packet, all follow the principle that every pseudo-line is transmitted a message during forwarding.
Further, all be transmitted to CE2 in order to prevent a plurality of identical message that PE2 will receive, PE1 adds sign can also for before copy packet the message of receiving in 103, and then the message that adds after the sign is duplicated, and correspondingly, said method also comprises:
After the pseudo-line of 105:PE2 from above-mentioned three pseudo-lines receives message, parse the sign in this message earlier, judge according to this sign whether this message is duplicate message then, if duplicate message then abandons this message; Otherwise, remove the sign in this message after, it is transmitted to CE2.
For example, PE2 receives three message A, B and C respectively from PW1, PW2 and PW3, judges message B and C is a duplicate message according to the sign in the message, and then PE2 is transmitted to CE2 after message A is removed sign, and message B and C abandoned, thereby guarantee that CE2 only receives a message.
In the present embodiment, PE1 adds sign and PE2 and carries out the message identification mode according to sign and have multiplely, includes but not limited to following a kind of:
Adding sign for before PE1 duplicates in 103 the message of receiving is sequence number I, and in a plurality of messages that obtain after then duplicating, sequence number is I, and PE1 also is provided with the message of receiving that whenever a CE1 sends, adds 1 for sequence number I; The test serial number J that the default expectation of PE2 receives in 105, I is set to identical value with J during initialization, and PE2 is provided with the message of receiving that whenever a PE1 sends, add 1 for sequence number J, after PE2 received a message, if relatively sequence number I in this message and local sequence number J were I＜J, think that then this message is a duplicate message, abandons this message; If I=J, then remove the sequence number I in this message after, this message is transmitted to CE2; If I＞J judges further that then whether (I-J) be greater than preset threshold value, if then abandon this message; Otherwise, the value of J is changed into the value of I.Wherein, can threshold value be set according to the maximum of I and J, all adopt 4 bytes as I and J, span is 0～4294967295, and the initial value that I and J are set usually is 1, next value is an initial value 1 when sequence number value increases to maximum 4294967295, then threshold value can be set to 4294967295/3,4294967295/2 or 4294967295/5 or the like, preferably, when link-quality is better, can be provided with threshold value smaller, when link-quality is relatively poor, can be provided with threshold value more greatly.Judge according to threshold value, can prevent the influence of message dropping or sequence number when counter-rotating follow-up reception message.
For example, PE1 is initialized as 1 with I during initialization, PE2 also is initialized as 1 with J, PE1 adds sign in first message that the CE1 that receives sends be sequence number I, and its value is 1, referring to Fig. 5, Fig. 5 is the message format schematic diagram after the interpolation sign that provides of the embodiment of the invention 1, the message that adds after identifying comprises 2 layers of (link layer) encapsulation header, outer layer label, vpn label, sequence number I and user's 2 layer data, and PE1 duplicates this message and obtains a plurality of identical messages then, sends to PE2 by many PW.After PE2 receives message from these many PW, the message of receiving is at first resolved, obtain I=1, I is compared with J, because J=1, the message that i.e. expectation receives is that sequence number is 1 message, I=J then, therefore remove the sequence number I in this message after, it is transmitted to CE2, then J is added 1, i.e. J=2.PE2 also resolves the follow-up message of receiving, if I still is 1, then judges I＜J, therefore is that 1 message all abandons with the follow-up I that receives, thereby guarantees that CE2 can not receive the message that duplicates.
In one embodiment of the invention, if the message of receiving needs burst, above-mentioned steps 103 specifically comprises to 105 so:
PE1 carries out burst to the message of receiving, obtains a plurality of fragment messages; PE1 is for any fragment message in these a plurality of fragment messages, copy at least one fragment message earlier, then by at least two pseudo-lines in the many pseudo-lines of setting up in advance, transmit the principle of a fragment message according to every pseudo-line, transmit this any fragment message and for its fragment message that duplicates to PE2.In order to prevent that PE2 from transmitting the message that repeats, PE1 can also add sign for the message of receiving before the message of receiving is carried out burst; Correspondingly, after PE2 receives the fragment message that comes from above-mentioned many pseudo-lines, same group a plurality of fragment messages of receiving of belonging to are recombinated, and according to the sign in the message after the reorganization, judge whether the message after the reorganization is duplicate message, if then abandon the message after the reorganization; Otherwise the sign of removing in the message after recombinating is transmitted to CE2 then.
For example, referring to Fig. 6, Fig. 6 is the schematic flow sheet that adds sign back burst earlier that the embodiment of the invention 1 provides, transmitting terminal PE adds sign and promptly sends sequence number 1 in user's message, determine the message of encapsulation after the sequence number and need burst, then start the burst handling procedure message is carried out burst, for instance, suppose to obtain three fragment messages, then these three fragment messages are duplicated respectively and send to far-end PE, and every PW in the PW protection group transmits a fragment message by the PW protection group of setting up in advance (comprising many PW); Suppose to have three PW, then each fragment message duplicates two parts, comprises that the message that receives is carried out the fragment message that burst obtains obtains 9 fragment messages altogether, and every PW transmits three fragment messages that belong to same group and gives far-end PE.After receiving terminal PE receives fragment message, the fragment message that belongs to same group is recombinated, and extract in the message after reorganization and send sequence number, send sequence number according to this and to judge that whether this message is that the message of repetition is (when going out to send sequence number the test serial number that receives less than receiving terminal PE expectation by default rule judgment, think that this message is a duplicate message), if then abandon this message; Otherwise, it is transmitted to purpose CE.
Present embodiment carries customer flow simultaneously by many PW; when link occurs fault; other links are unaffected; can continue converting flow; realized link protection; avoided causing providing the reliability guarantee of higher level for user link switching and returning the situation generation of losing customer flow when cutting owing to adopting backup link to protect.Do not need to carry out link switchover, saved the consumption of link failure detection mechanism, saved equipment supplier's equipment R﹠D costs.When message needs burst, adopt the mode of adding sign back burst earlier, saved the consumption of package identification.
Embodiment 2
Fig. 7 is the method flow diagram that E-Packets that the embodiment of the invention 2 provides.Referring to Fig. 7, the embodiment of the invention also provides a kind of method that E-Packets, and this method specifically comprises:
201:CE1 sends message to PE1, and this message is a user's message, and destination address is CE2.
202:PE1 receives the message that CE1 sends.
203:PE1 judges the message of receiving needs burst, then this message is carried out burst, obtains a plurality of fragment messages;
204:PE1 is to any fragment message in a plurality of fragment messages that obtain, copy at least one fragment message earlier, then by at least two pseudo-lines in three pseudo-lines setting up in advance, transmit the principle of a fragment message according to every pseudo-line, transmitting this any fragment message and give PE2 for its fragment message that duplicates, is that example describes any fragment message is all copied two fragment messages in the present embodiment.
For example, the message that PE1 receives is X, obtains two fragment messages behind the burst and is respectively X
1And X
2, at first to X
1Duplicate, copy two fragment messages, then obtain three identical fragment message X altogether
1, pass through PW1, PW2 and PW3 then respectively with three X
1Be transmitted to PE2, wherein each PW transmits an X
1Then to X
2Duplicate, copy two fragment messages, then obtain three identical fragment message X altogether
2, pass through PW1, PW2 and PW3 then respectively with three X
2Be transmitted to PE2, wherein each PW transmits an X
2
In order to prevent that receiving terminal PE2 from sending to receiving terminal CE2 with the message that repeats, further, whether PE1 can also add sign in message, be the message of repetition so that receiving terminal PE2 is used for discerning message, as different from Example 1, PE1 carries out burst to message earlier in the present embodiment, add sign then in fragment message, promptly PE1 added sign to fragment message earlier before duplicating fragment message in 204, and then duplicate, also include identical sign in the then duplicated fragment message.Correspondingly, present embodiment also comprises:
When 205:PE2 receives fragment message from above-mentioned three pseudo-lines,, judge whether this fragment message is the fragment message of repetition, if then abandon this fragment message according to the sign in this fragment message; Otherwise, remove the sign in this fragment message.
206: after PE2 obtains removing sign and belongs to a plurality of fragment messages of same group, should recombinate by a plurality of fragment messages, the message after will recombinating then is transmitted to CE2.
For example; Fig. 8 is the schematic flow sheet that sign is provided behind the first burst that provides of the embodiment of the invention 2, and referring to Fig. 8, transmitting terminal PE carries out burst to the message X that receives and obtains three fragment message A, B and C; adding sends sequence number duplicates after 1; obtain three identical A, three identical B and three identical C, for convenience of description; respectively they are designated A1, A2 and A3; B1, B2 and B3, and C1, C2 and C3 are transmitted to far-end PE by PW protection group then.When receiving terminal PE when PW protection group is received three fragment message A1, A2 and A3 respectively, because the sequence number in the message is 1, then the fragment message A1 that receives earlier is considered as expecting the message that receives, the follow-up A2 that receives and A3 are considered as the message of repetition, therefore remove the sign among the message A1, and message A2 and A3 are abandoned; When receiving terminal PE is follow-up receive fragment message B1, B2 and B3 after, keep B3 according to sign (suppose that B3 receives earlier) and abandon B1 and B2, and the sign among the removal B3; After receiving fragment message C1, C2 and C3, keep C1 according to sign (supposing that C1 receives earlier) and abandon C2 and C3, and remove the sign among the C1; At this moment, all fragment messages that receiving terminal PE has obtained belonging to same group and removed sign, fragment message A1, B3 and the C1 that therefore will belong to same group recombinate, and recover message X, and the message X that will obtain after will recombinating send to purpose CE.
PE1 adds sign and PE2 and carries out the message identification mode according to sign and can adopt specific implementation among the embodiment 1 in the present embodiment, repeats no more herein.
Present embodiment carries customer flow simultaneously by many PW; when link occurs fault; other links are unaffected; can continue converting flow; realized link protection; avoided causing providing the reliability guarantee of higher level for user link switching and returning the situation generation of losing customer flow when cutting owing to adopting backup link to protect.Do not need to carry out link switchover, saved the consumption of link failure detection mechanism, saved equipment supplier's equipment R﹠D costs.When message needs burst, add label manner after adopting first burst, receiving terminal PE carries out the parsing of fragment message sequence number earlier, abandons when recognizing the fragment message of repetition, has saved the process of fragment message reorganization.
Embodiment 3
Referring to Fig. 9, the embodiment of the invention provides a kind of equipment that E-Packets, and specifically comprises:
Receiver module is used to receive message;
Forwarding module, be used to duplicate the message that receiver module receives and obtain at least one message, by at least two pseudo-lines in the many pseudo-lines of setting up in advance, transmit the principle of a message according to every pseudo-line, transmit the message that receives and duplicate at least one message that obtains and give receiving terminal PE.
In the tool, forwarding module can specifically comprise:
Identify unit, the message that is used for receiving at receiver module adds sign;
Retransmission unit, be used to duplicate the message after identify unit adds sign, obtain at least one message, by at least two pseudo-lines in the many pseudo-lines of setting up in advance, transmit the principle of a message according to every pseudo-line, transmit the message that receives and duplicate at least one message that obtains and give receiving terminal PE.
In addition, forwarding module can also specifically comprise:
Sharding unit, the message that is used for receiver module is received carries out burst, obtains a plurality of fragment messages;
Retransmission unit, any fragment message that is used for a plurality of fragment messages that sharding unit is obtained, copy at least one fragment message earlier, then by at least two pseudo-lines in the many pseudo-lines of setting up in advance, transmit the principle of a fragment message according to every pseudo-line, transmit this any fragment message and for its fragment message that duplicates to receiving terminal PE.
When forwarding module comprised sharding unit and retransmission unit, wherein, sharding unit can specifically comprise:
The sign subelement, the message that is used for receiving at receiver module adds sign;
The burst subelement is used for the message that the sign subelement adds after identifying is carried out burst, obtains a plurality of fragment messages.
In addition, sharding unit can also specifically comprise:
The burst subelement, the message that is used for receiver module is received carries out burst, obtains a plurality of fragment messages;
The sign subelement is used to each fragment message in a plurality of fragment messages that the burst subelement obtains to add sign.
Present embodiment carries customer flow simultaneously by many PW; when link occurs fault; other links are unaffected; can continue converting flow; realized link protection; avoided causing providing the reliability guarantee of higher level for user link switching and returning the situation generation of losing customer flow when cutting owing to adopting backup link to protect.Do not need to carry out link switchover, saved the consumption of link failure detection mechanism, saved equipment supplier's equipment R﹠D costs.When message needs burst, adopt the mode of adding sign back burst earlier, saved the consumption of package identification.
Embodiment 4
Referring to Figure 10, the embodiment of the invention also provides a kind of equipment that receives message, comprising:
Receiver module is used to receive message, and this message is that transmitting terminal PE sends by two pseudo-lines in the many pseudo-lines of setting up in advance at least;
Processing module is used to judge whether receiver module receives message is the message of repetition, if then abandon this message.
Wherein, processing module specifically comprises:
Judging unit when the message that is used for receiving when receiver module is not fragment message, judges according to the sign in this message whether this message is the message of repetition;
Processing unit is used for abandoning this message when judgment unit judges goes out this message and is the message of repetition; When judging this message and be not the message of repetition, remove the sign in this message, and be transmitted to receiving terminal CE.
Perhaps, processing module specifically comprises:
Judging unit is used for judging according to the sign in this fragment message whether this fragment message is the message of repetition when the message of receiver module reception is fragment message;
Processing unit is used for abandoning this fragment message when judgment unit judges goes out this fragment message and is the message of repetition; When judgment unit judges goes out this fragment message and is not the message of repetition, remove the sign in this fragment message; And after obtaining removing sign and belonging to a plurality of fragment messages of same group, should recombinate by a plurality of fragment messages, be transmitted to receiving terminal CE.
Whether be the message of repetition and handle accordingly if discerning this message according to the sign in the message of receiving for equipment in the present embodiment, can avoid receiving terminal CE to receive the message of repetition.When receiving fragment message, receiving device carries out the parsing of fragment message sequence number earlier, abandons when recognizing the fragment message of repetition, has saved the process of fragment message reorganization.
Embodiment 5
Referring to Figure 11, the embodiment of the invention also provides a kind of equipment that receives message, specifically comprises:
Receiver module is used to receive fragment message, and this fragment message is that transmitting terminal PE sends by two pseudo-lines in the many pseudo-lines of setting up in advance at least;
Recombination module is used for same group a plurality of fragment messages of belonging to that receiver module is received are recombinated;
Processing module is used to judge whether the message after the reorganization is the message of repetition, if then abandon the message after the reorganization.
Further, processing module specifically comprises:
Judging unit is used for the sign according to the message after the recombination module reorganization, judges whether the message after the reorganization is the message of repetition; Wherein, this is designated transmitting terminal PE and adds in the message before burst;
Processing unit when being used for message after judgment unit judges goes out reorganization and being the message of repetition, abandons the message after the reorganization; When the message after judgment unit judges goes out reorganization is not the message of repetition, remove the sign in the message after recombinating, be transmitted to receiving terminal CE.
After equipment in the present embodiment is received fragment message, recombinate earlier, abandon this message after judging the message of this message according to the sign in the message after the reorganization then, otherwise be transmitted to receiving terminal CE after removing sign, avoided receiving terminal CE to receive the message of repetition for repetition.
Embodiment 6
Referring to Figure 12, the embodiment of the invention provides a kind of system that E-Packets, and specifically comprises:
Sending ending equipment is used for the message that receiving end/sending end CE sends, and duplicates this message and obtains at least one message; By at least two pseudo-lines in the many pseudo-lines of setting up in advance,, transmit message that receives and at least one message that duplicates according to the principle of a message of every pseudo-line forwarding;
Receiving device is used for the message of receiving end/sending end device forwards, judges whether this message is the message of repetition, if then abandon this message.
Further, sending ending equipment can also add sign in the message of receiving before copy packet; Correspondingly, receiving device can judge whether this message is the message of repetition, if then abandon this message according to the sign in the message of receiving; Otherwise, remove the sign in this message, be transmitted to receiving terminal CE then.If the message that receiving device receives is a fragment message, when then receiving device is judged this fragment message and is the message of repetition according to the sign in this fragment message, abandon this fragment message; When judging this fragment message and not being the message of repetition, remove the sign in this fragment message; And after obtaining removing sign and belonging to a plurality of fragment messages of same group, a plurality of fragment messages are recombinated, be transmitted to receiving terminal CE.
Present embodiment carries customer flow simultaneously by many PW; when link occurs fault; other links are unaffected; can continue converting flow; realized link protection; avoided causing providing the reliability guarantee of higher level for user link switching and returning the situation generation of losing customer flow when cutting owing to adopting backup link to protect.Do not need to carry out link switchover, saved the consumption of link failure detection mechanism, saved equipment supplier's equipment R﹠D costs.Receiving device abandons the duplicate message that identifies according to sign, can avoid receiving terminal CE to receive duplicate message.
Embodiment 7
Referring to Figure 12, the embodiment of the invention also provides a kind of system that E-Packets, and specifically comprises:
Sending ending equipment is used for the message that receiving end/sending end CE sends, and this message is carried out burst, obtains a plurality of fragment messages; To any fragment message in these a plurality of fragment messages, copy at least one fragment message, and,, transmit this any fragment message and be its fragment message that duplicates according to the principle of a fragment message of every pseudo-line forwarding by at least two pseudo-lines in the many pseudo-lines of setting up in advance;
Receiving device is used for the fragment message that receiving end/sending end equipment is sent, and same group a plurality of fragment messages of receiving of belonging to are recombinated, and judges whether the message after the reorganization is the message of repetition, if then abandon the message after the reorganization.
Further, sending ending equipment adds sign can also for earlier the message that receives, and carries out burst then, obtains a plurality of fragment messages; Correspondingly, behind the receiving device reorganization fragment message, judge according to the sign in the message after the reorganization whether it is the message of repetition, if then abandon; Otherwise, remove the sign in the message after recombinating, and be transmitted to receiving terminal CE.
Present embodiment carries customer flow simultaneously by many PW; when link occurs fault; other links are unaffected; can continue converting flow; realized link protection; avoided causing providing the reliability guarantee of higher level for user link switching and returning the situation generation of losing customer flow when cutting owing to adopting backup link to protect.Do not need to carry out link switchover, saved the consumption of link failure detection mechanism, saved equipment supplier's equipment R﹠D costs.Receiving device to the reorganization of the fragment message received after, abandon the duplicate message that identifies according to wherein sign, can avoid receiving terminal CE to receive duplicate message.
The embodiment of the invention or a part wherein can utilize software to realize that corresponding software programs can be stored in the storage medium that can read, for example, and in the hard disk of router, buffer memory or the CD.
Below only be preferred embodiment of the present invention, or not within the spirit and principles in the present invention not all in order to restriction the present invention, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. a method that E-Packets is characterized in that, described method comprises:
Receive message;
Duplicate described message and obtain at least one message;
By at least two pseudo-lines in the many pseudo-lines of setting up in advance, transmit the principle of a message according to every pseudo-line, transmits the described message that receives and duplicate described at least one message of obtaining to receiving terminal carrier network edge device PE.
2. the method that E-Packets according to claim 1 is characterized in that, duplicates before the described message, also comprises:
In the message of described reception, add sign.
3. the method that E-Packets according to claim 1 is characterized in that, describedly duplicates described message and obtains at least one message, specifically comprises:
When the message of described reception needs burst, the message of described reception is carried out burst, obtain a plurality of fragment messages;
Any fragment message in described a plurality of fragment messages copies at least one fragment message;
Correspondingly, described by at least two pseudo-lines in the many pseudo-lines of setting up in advance, transmit the principle of a message according to every pseudo-line, transmit the described message that receives and duplicate described at least one message of obtaining, specifically comprise to receiving terminal carrier network edge device PE:
To any fragment message in described a plurality of fragment messages, by at least two pseudo-lines in the described many pseudo-lines of setting up in advance, transmit the principle of a fragment message according to every pseudo-line, transmits described any fragment message and for its fragment message that duplicates to described receiving terminal PE.
4. the method that E-Packets according to claim 3 is characterized in that, described message to described reception carries out burst, specifically comprises:
In the message of described reception, add sign, and the message after the described interpolation sign is carried out burst.
5. the method that E-Packets according to claim 3 is characterized in that, described obtaining also comprises after a plurality of fragment messages:
Add sign for each fragment message in described a plurality of fragment messages.
6. an equipment that E-Packets is characterized in that, described equipment comprises:
Receiver module is used to receive message;
Forwarding module, be used to duplicate the message that described receiver module receives and obtain at least one message, by at least two pseudo-lines in the many pseudo-lines of setting up in advance, transmit the principle of a message according to every pseudo-line, transmits the described message that receives and duplicate described at least one message of obtaining to receiving terminal PE.
7. the equipment that E-Packets according to claim 6 is characterized in that, described forwarding module specifically comprises:
Identify unit, the message that is used for receiving at described receiver module adds sign;
Retransmission unit, be used to duplicate the message after described identify unit adds sign, obtain described at least one message, by at least two pseudo-lines in the described many pseudo-lines of setting up in advance, transmit the principle of a message according to every pseudo-line, transmits the described message that receives and duplicate described at least one message of obtaining to described receiving terminal PE.
8. the equipment that E-Packets according to claim 6 is characterized in that, described forwarding module specifically comprises:
Sharding unit, the message that is used for described receiver module is received carries out burst, obtains a plurality of fragment messages;
Retransmission unit, any fragment message that is used for a plurality of fragment messages that described sharding unit is obtained, copy at least one fragment message earlier, then by at least two pseudo-lines in the many pseudo-lines of setting up in advance, transmit the principle of a fragment message according to every pseudo-line, transmits described any fragment message and for its fragment message that duplicates to receiving terminal PE.
9. the equipment that E-Packets according to claim 8 is characterized in that, described sharding unit specifically comprises:
The sign subelement, the message that is used for receiving at described receiver module adds sign;
The burst subelement is used for the message that described sign subelement adds after identifying is carried out burst, obtains described a plurality of fragment message.
10. the equipment that E-Packets according to claim 8 is characterized in that, described sharding unit specifically comprises:
The burst subelement, the message that is used for described receiver module is received carries out burst, obtains described a plurality of fragment message;
The sign subelement is used to each fragment message in a plurality of fragment messages that described burst subelement obtains to add sign.
11. an equipment that receives message is characterized in that, described equipment comprises:
Receiver module is used to receive message, and described message is that transmitting terminal PE sends by two pseudo-lines in the many pseudo-lines of setting up in advance at least;
Processing module is used to judge whether the message that described receiver module receives is the message of repetition, if then abandon described message.
12. the equipment of reception message according to claim 11 is characterized in that, described processing module specifically comprises:
Judging unit when the message that is used for receiving when described receiver module is not fragment message, judges according to the sign in the described message whether described message is the message of repetition;
Processing unit is used for abandoning described message when described judgment unit judges goes out described message and is the message of repetition; When judging described message and be not the message of repetition, remove the sign in the described message, and be transmitted to receiving terminal CE.
13. the equipment of reception message according to claim 11 is characterized in that, described processing module specifically comprises:
Judging unit is used for judging according to the sign in the described fragment message whether described fragment message is the message of repetition when the message of described receiver module reception is fragment message;
Processing unit is used for abandoning described fragment message when described judgment unit judges goes out described fragment message and is the message of repetition; When described judgment unit judges goes out described fragment message and is not the message of repetition, remove the sign in the described fragment message; And after obtaining removing sign and belonging to a plurality of fragment messages of same group, described a plurality of fragment messages are recombinated, be transmitted to receiving terminal CE.
14. an equipment that receives message is characterized in that, described equipment comprises:
Receiver module is used to receive fragment message, and described fragment message is that transmitting terminal PE sends by two pseudo-lines in the many pseudo-lines of setting up in advance at least;
Recombination module is used for same group a plurality of fragment messages of belonging to that described receiver module is received are recombinated;
Processing module is used to judge whether the message after the described reorganization is the message of repetition, if then abandon the message after the described reorganization.
15. the equipment of reception message according to claim 14 is characterized in that, described processing module specifically comprises:
Judging unit is used for the sign according to the message after the described recombination module reorganization, judges whether the message after the described reorganization is the message of repetition;
Processing unit when being used for message after described judgment unit judges goes out described reorganization and being the message of repetition, abandons the message after the described reorganization; When the message after described judgment unit judges goes out described reorganization is not the message of repetition, remove the sign in the message after the described reorganization, be transmitted to receiving terminal CE.
16. a system that E-Packets is characterized in that, described system comprises:
Sending ending equipment, be used for the message that receiving end/sending end CE sends, duplicate described message and obtain at least one message, by at least two pseudo-lines in the many pseudo-lines of setting up in advance, according to the principle of a message of every pseudo-line forwarding, transmit the described message that receives and duplicate described at least one message that obtains;
Receiving device is used to receive the message that described sending ending equipment is transmitted, and judges whether described message is the message of repetition, if then abandon described message.
17. a system that E-Packets is characterized in that, described system comprises:
Sending ending equipment is used for the message that receiving end/sending end CE sends, and described message is carried out burst, obtains a plurality of fragment messages; To any fragment message in described a plurality of fragment messages, copy at least one fragment message, and by at least two pseudo-lines in the many pseudo-lines of setting up in advance, according to the principle of a fragment message of every pseudo-line forwarding, transmit described any fragment message and be its fragment message that duplicates;
Receiving device is used to receive the fragment message that described sending ending equipment is sent, and same group a plurality of fragment messages of receiving of belonging to are recombinated, and judges whether the message after the described reorganization is the message of repetition, if then abandon the message after the described reorganization.
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| CN2008100076005A CN101257441B (en) | 2008-02-29 | 2008-02-29 | Method, equipment and system for forwarding message as well as equipment for receiving message |
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| CN2008100076005A CN101257441B (en) | 2008-02-29 | 2008-02-29 | Method, equipment and system for forwarding message as well as equipment for receiving message |
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Effective date of registration: 20201204 Address after: No.3, East high tech Industrial Zone, Maqiao Town, Jingjiang City, Taizhou City, Jiangsu Province Patentee after: Jiangsu Hengbo pneumatic conveying equipment manufacturing Co.,Ltd. Address before: Unit 2414-2416, main building, no.371, Wushan Road, Tianhe District, Guangzhou City, Guangdong Province Patentee before: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Effective date of registration: 20201204 Address after: Unit 2414-2416, main building, no.371, Wushan Road, Tianhe District, Guangzhou City, Guangdong Province Patentee after: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |
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