CN101026504A - Network for formance measuring method - Google Patents
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- CN101026504A CN101026504A CNA200610057700XA CN200610057700A CN101026504A CN 101026504 A CN101026504 A CN 101026504A CN A200610057700X A CNA200610057700X A CN A200610057700XA CN 200610057700 A CN200610057700 A CN 200610057700A CN 101026504 A CN101026504 A CN 101026504A
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Abstract
The method includes steps: continuous receiving at least one operation, administration and maintenance (OAM) message carried with sending time stamp from source node, measurement node records time stamp of receiving OAM message, saves the sending time stamp carried by OAM message, and self recorded receiving time stamp; based on saved sending time stamp and receiving time stamp, measurement node calculates network performance index. Without need of inpouring probe message to network, the method can keep consistent network performance index between performance measure period and not performance measure period so as to raise accuracy for measuring network performance.
Description
Technical field
The present invention relates to the network performance measurement technology, more particularly, relate to network for formance measuring method based on Operations, Administration and Maintenance (OAM) message.
Background technology
Current Virtual network operator is for improving network service quality, can carry out network performance measurement regularly and submit Performance Measurement Report to the user, so that the real awareness network service level of user, thereby lifting customers' satisfaction level, simultaneously, the result of performance measurement also helps Virtual network operator maintaining network better.According to the regulation of current agreement, the index that is used to weigh network performance generally includes: time delay (TD), delay variation (DV), packet loss (LR) and unavailability (UA) etc.
When carrying out network performance measurement, understand special configuration performance measurement message usually in the prior art, i.e. the probe message of Portability energy measurement information.Common, by injecting at two ends, path to be measured and receiving the probe message, can obtain network performance index according to the performance measurement information that the probe message carries.But, when injecting a large amount of probe message in the network, can influence the traffic characteristic of network, and then influence the measurement result of network performance index, cause carrying out index that performance measurement obtains and the performance index of real network have bigger deviation by injection probe message.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of network for formance measuring method, needn't in network, inject specific probe message, can improve the network performance measurement accuracy simultaneously.
According to the foregoing invention purpose, the present invention proposes a kind of network for formance measuring method, the method comprising the steps of:
A, measured node receive at least one OAM message that transmitting time is stabbed that carries from source node continuously, and the time of reception that writes down described OAM message stabs, and preserve that the transmitting time of carrying in the described OAM message is stabbed and the time of reception stamp of self record;
B, measured node are stabbed according to the transmitting time of being preserved and time of reception stamp computing network performance index.
Wherein, further carry sequence number in the described OAM message;
Measured node described in the steps A is further preserved the sequence number that carries in the described OAM message;
Measured node described in the step B is further according to the sequence number computing network performance index of being preserved.
Wherein, described measured node is a destination node, and network performance index described in the step B is that source node is to the unilateral network performance index between the destination node; Or described measured node is to be used to transmit the intermediate node of described OAM message to destination node, measured node writes down after the time of reception stamp of described OAM message in the steps A, further transmit described OAM message to destination node, network performance index described in the step B is that source node is to the unilateral network performance index between the intermediate node.
Wherein, described measured node is a source node;
Further comprise before the steps A: destination node receives at least one OAM message that carries transmitting time stamp and sequence number from source node continuously, and returns the OAM message that is received and give source node;
Network performance index described in the step B is that source node is to the bilateral network performance index between the destination node.
Wherein, described source node and described measured node set in advance and are time synchronized.
Wherein, described transmitting time stamp and sequence number are carried in the existing field of described OAM message.
Wherein, described OAM message is a multiprotocol label switching (mpls) network OA M message.
Wherein, the value of described OAM message function type field is 04, and described sequence number is carried in the reserved field of OAM message, and described transmitting time is stabbed and is carried in the filling field of described OAM message.
Wherein, the described OAM message OAM message that is IP network.
Wherein, described performance index are: the combination in any of time delay or delay variation or packet loss or unavailability or above index.
As seen, network for formance measuring method provided by the invention, with the carrier of OAM message common on the current network as performance measurement information, the method of the usefulness of this OAM message double as performance measurement message, need not to inject the probe message to network, make the network performance and the network performance in non-performance measurement stage in performance measurement stage be consistent, improved the accuracy of network performance measurement.
Description of drawings
Fig. 1 is the schematic diagram of the network for formance measuring method of the embodiment of the invention one;
Fig. 2 is the flow chart of the network for formance measuring method of the embodiment of the invention one;
Fig. 3 is the schematic diagram of the network for formance measuring method of the embodiment of the invention two;
Fig. 4 is the flow chart of the network for formance measuring method of the embodiment of the invention two;
Fig. 5 is the schematic diagram of the network for formance measuring method of the embodiment of the invention three;
Fig. 6 is the flow chart of the network for formance measuring method of the embodiment of the invention three.
Embodiment
Core concept of the present invention is: by add performance measurement information in the OAM message, realize the network performance measurement based on the OAM message, this method is applicable to the arbitrary network of supporting OAM(Operation Administration Maintenance).
Below be presented in the concrete grammar that adds performance measurement information in the OAM message.
(1) method of interpolation performance measurement information in the OAM of multiprotocol label switching (mpls) network message.
Existing MPLS OAM message comprises following field according to vertical order: the function type of 1 byte (Function type) field; The reserved field of 3 bytes; Label switched path termination source identifier (the LSP Trail Termination Source Identifier) field of 20 bytes; The filling of 18 bytes (Padding) field; The Bit-Interleaved Parity of 2 bytes (BIP) field.
Here, latter two byte that can utilize the reserved field in the existing MPLS OAM message utilizes preceding 4 bytes of filling field to stab field as transmitting time as sequence-number field.
Therefore, the MPLS OAM message of the MPLS of being used for network performance measurement provided by the invention comprises following field according to vertical order: the function type field of 1 byte, and its field value is 04, represents that this OAM message is used for performance measurement; The reserved field of 1 byte; The sequence-number field of 2 bytes (SN, SequenceNumber); The LSP termination source identifier field of 20 bytes; The transmitting time of 4 bytes is stabbed (TS, Timestamp Sent) field; The filling field of 14 bytes; The bip field of 2 bytes.
Wherein, position and length that sequence-number field and transmitting time are stabbed field are not limited to above-mentioned setting, but can be provided with arbitrarily according to the needs of practical application.
(2) method of interpolation performance measurement information in the OAM of IP network message.
Existing IP message comprises following field according to vertical order: version (Version) field; Head length (IHL) field; Differential service (TOS) field; Total length (Total Length) field; Sign (Identification) field; Mark (Flags) field; Fragment Offset (Fragment Offset) field; Lifetime (TTL) field; Agreement (Protocol) field; Header check and (Header Checksum) field; Source IP (Source IP) field; Purpose IP (Destination IP) field; Optional Field.
Here, can utilize two bytes in the Optional Field in the existing IP OAM message, utilize 4 bytes in the Optional Field to stab field as transmitting time as sequence-number field.
Therefore, the IP OAM message that is used for performance measurement provided by the invention comprises following field according to vertical order: version field; Header length field; The differential service field; Total length field; Attribute field; Tag field; The Fragment Offset field; Lifetime field; Protocol fields, its field value is 255, represents that this IP message is the OAM message; Header check and field; Source IP field; Purpose IP field; The OAM type field represents that this OAM message is the OAM message that is used for performance measurement; Sequence-number field; Transmitting time is stabbed field; Reserved field.
Wherein, position and length that sequence-number field and transmitting time are stabbed field are not limited to above-mentioned setting, but can be provided with arbitrarily according to the needs of practical application.
For making the purpose, technical solutions and advantages of the present invention clearer, by the following examples, and with reference to accompanying drawing, the present invention is described in more detail.
Embodiment one: present embodiment is measured situation at one-way performance, Fig. 1 is the schematic diagram of the network for formance measuring method of the embodiment of the invention one, source node A sends the OAM message to destination node D, destination node D carries out network performance measurement based on the OAM message as measured node, to obtain the one-way performance index between source node A and the destination node D, common, keep clock synchronization between source node A and the measured node D.
Fig. 2 is the flow chart of the network for formance measuring method of the embodiment of the invention one, and before measuring beginning, destination node D sets in advance the measurement period T of self, and the network for formance measuring method of the embodiment of the invention one comprises:
Step 201: source node A and destination node D carry out in measurement period T at least once continuously based on the one-way performance measuring operation of OAM message, and be common, and the number of times of performance measurement operation is more than three times;
Step 202: destination node D arrives the back in measurement period T and calculates the one-way performance index between the source node A and destination node D in the measurement period T.
Wherein, the performed measuring operation of one-way performance each time of source node A and destination node D all may further comprise the steps a1～b1 in the step 201, only shows the wherein concrete steps of twice one-way performance measuring operation among Fig. 2.
Step a1～b1: source node A sends the OAM message of interpolation transmitting time stamp and sequence number to destination node D; Destination node D extracts transmitting time and stabs and sequence number from the OAM message that receives, the recorder timestamp, and the preservation transmitting time is stabbed, time of reception stabs and sequence number.
For instance, suppose that in measurement period T destination node D receives M the OAM message from source node A altogether, correspondingly, destination node D collects M group timestamp and sequence number, and table 1 has been listed collected timestamp and a kind of of sequence number of destination node D may situation.
| Group number | Sequence number | Transmitting time is stabbed (STS s) | Time of reception stabs (STS r) |
| 1 | 2 | STS s(AD)_2 | STS r(AD)_2 |
| 2 | 3 | STS s(AD)_3 | STS r(AD)_3 |
| ... | ... | ... | |
| M-2 | N-5 | STS s(AD)_N-5 | STS r(AD)_N-5 |
| M-1 | N-4 | STS s(AD)_N-4 | STS r(AD)_N-4 |
| M | N-3 | STS s(AD)_N-3 | STS r(AD)_N-3 |
Table 1
Correspondingly, destination node D can calculate one-way performance index between source node A and the destination node D according to the timestamp in the table 1 and sequence number, and is concrete:
(1) the One Way Delay STD (AD) between source node A and the destination node D, STD (AD) _ m=STS
r(AD) _ m-STS
s(AD) _ and m, 1≤m≤M after the One Way Delay that calculates all M OAM messages, also can further calculate the unidirectional average delay MSTD (AD) in the measurement period T;
(2) shake of the One Way Delay between source node A and destination node D SDV (AD), SDV (AD)=STD (AD) _ m+1-STD (AD) _ m, 1≤m≤M-1;
(3) the unidirectional packet loss SLR (AD) between source node A and the destination node D, the real OAM message number of receiving of destination node is M, receivable OAM message number can obtain by the sequence number that calculating destination node D collects, as known from Table 1, the maximum sequence number that destination node D collects is N-3, and minmal sequence number is 2, and this expression destination node D is actual minimum receivable to N-3-2+1=N-4 OAM message, correspondingly, source node A is to packet loss SLR (the AD)=M/ (N-4) * 100% between the destination node D;
(4) unidirectional unavailability SUA (AD), usually, packet loss can think that greater than 25% network is unavailable, supposes that SLR (AD) is Tua (AD) greater than time of 25%, then SUA (AD)=Tua (AD)/T * 100%.
Embodiment two: present embodiment is measured situation at one-way performance, Fig. 3 is the schematic diagram of the network for formance measuring method of the embodiment of the invention two, the OAM message that source node A sends to destination node D is forwarded to destination node D via intermediate node B and intermediate node C, intermediate node B carries out network performance measurement based on the OAM message as measured node, to obtain source node A to the one-way performance index between the intermediate node B, common, keep clock synchronization between source node A and the measured node B.
Fig. 4 is the flow chart of the network for formance measuring method of the embodiment of the invention two, and before measuring beginning, intermediate node B sets in advance self measurement period T, and the network for formance measuring method of the embodiment of the invention two comprises:
Step 401: source node A and intermediate node B carry out in measurement period T at least once continuously based on the one-way performance measuring operation of OAM message, and be common, and the number of times of performance measurement operation is more than three times;
Step 402: intermediate node B arrives the back in measurement period T and calculates the one-way performance index between the source node A and intermediate node B in the measurement period T.
Wherein, the performed measuring operation of one-way performance each time of source node A and intermediate node B all may further comprise the steps a2～c2 in the step 401, only shows the wherein concrete steps of twice one-way performance measuring operation among Fig. 4.
Step a2～c2: source node A sends the OAM message of interpolation transmitting time stamp and sequence number to intermediate node B; Intermediate node B extracts transmitting time and stabs and sequence number from the OAM message that receives, the recorder timestamp, and the preservation transmitting time is stabbed, time of reception stabs and sequence number; Intermediate node B transmits the OAM message that is received through intermediate node C and arrives destination node D.
In the present embodiment, intermediate node C also can carry out performance measurement operation synchronously with intermediate node B, that is keeps clock synchronization between source node A, measured node B and the measured node C three, and measured node B and measured node C begin simultaneously to measure and finish and measure.Suppose that in measurement period T timestamp and sequence number that intermediate node B collects are as shown in table 2, timestamp and sequence number that intermediate node C collects are as shown in table 3.
| Group number | Sequence number | Transmitting time is stabbed (STS s) | Time of reception stabs (STS r) |
| 1 | 7 | STS s(AB)_7 | STS r(AB)_7 |
| 2 | 9 | STS s(AB)_9 | STS r(AB)_9 |
| 3 | 10 | STS s(AB)_10 | STS r(AB)_10 |
| 4 | 11 | STS s(AB)_11 | STS r(AB)_11 |
| 5 | 12 | STS s(AB)_12 | STS r(AB)_12 |
| 6 | 13 | STS s(AB)_13 | STS r(AB)_13 |
Table 2
| Group number | Sequence number | Transmitting time is stabbed (STS s) | Time of reception stabs (STS r) |
| 1 | 7 | STS s(AC)_7 | STS r(AC)_7 |
| 2 | 10 | STS s(AC)_10 | STS r(AC)_10 |
| 3 | 11 | STS s(AC)_11 | STS r(AC)_11 |
| 4 | 12 | STS s(AC)_12 | STS r(AC)_12 |
Table 3
Correspondingly, intermediate node B can be according to the one-way performance index between the timestamp in the table 2 and sequence number calculating source node A and the intermediate node B, intermediate node C can be according to the one-way performance index between the timestamp in the table 3 and sequence number calculating source node A and the intermediate node C, the specific algorithm of one-way performance index has a detailed description in embodiment one, repeats no more here.
Further, utilize the one-way performance index between source node A and the intermediate node B, and the one-way performance index between source node A and the intermediate node C, also can calculate the one-way performance index between intermediate node B and the intermediate node C, concrete:
(1) the One Way Delay STD (BC) between intermediate node B and the intermediate node C, STD (BC)=STD (AC)-STD (AB);
(2) the unidirectional packet loss between intermediate node B and the intermediate node C
SLR (AB)=1/7 * 100%=14.286% can be calculated from table 2, SLR (AC)=2/6 * 100%=33.333% can be calculated from table 3, therefore, SLR (BC)=22.222%;
(3) the unidirectional unavailability SUA (BC) between intermediate node B and the intermediate node C usually, can utilize the minimum value of SUA (AC)-SUA (AB) estimation SUA (BC).
Embodiment three: present embodiment is at amphicheirality's energy measurement situation, Fig. 5 is the schematic diagram of the network for formance measuring method of the embodiment of the invention three, source node A sends the OAM message to destination node D, the OAM message from source node A that destination node D will receive returns to source node A, source node A carries out network performance measurement based on the OAM message as measured node, to obtain the two-way performance index between source node A and the destination node D.
Fig. 6 is the flow chart of the network for formance measuring method of the embodiment of the invention three, and before measuring beginning, destination node A sets in advance the measurement period T of self, and the network for formance measuring method of the embodiment of the invention three comprises:
Step 601: source node A and destination node D carry out at least once operating based on amphicheirality's energy measurement of OAM message in measurement period T continuously, and be common, and the number of times of performance measurement operation is more than three times;
Step 602: source node A arrives the back in measurement period T and calculates the two-way performance index between the source node A and destination node D in the measurement period T.
Wherein, the performed energy measurement of the amphicheirality each time operation of source node A and destination node D all may further comprise the steps a3～c3 in the step 601, only shows the wherein concrete steps of twice amphicheirality's energy measurement operation among Fig. 6.
Step a3～c3: source node A sends the OAM message of interpolation transmitting time stamp and sequence number to destination node D; Destination node D returns the OAM message that receives and gives source node A; Source node A extracts transmitting time and stabs and sequence number from the OAM message that returns, the recorder timestamp, and preserve transmitting time stamp, time of reception stamp and sequence number.
For instance, suppose in measurement period T that source node A reclaims M OAM message altogether, correspondingly, source node D collects M group timestamp and sequence number, and table 4 has been listed collected timestamp and a kind of of sequence number of source node A may situation.
| Group number | Sequence number | Transmitting time is stabbed (STS s) | Time of reception stabs (STS r) |
| 1 | 2 | DTS s(AD)_2 | DTS r(AD)_2 |
| 2 | 4 | DTS s(AD)_4 | DSTS r(AD)_4 |
| ... | ... | ... | |
| M-2 | N-5 | DTS s(AD)_N-5 | DTS r(AD)_N-5 |
| M-1 | N-4 | DTS s(AD)_N-4 | DTS r(AD)_N-4 |
| M | N-2 | DTS s(AD)_N-2 | DTS r(AD)_N-2 |
Table 4
Correspondingly, source node A can calculate two-way performance index between source node A and the destination node D according to the timestamp in the table 4 and sequence number, and is concrete:
(1) the two-way time delay D TD (AD) between source node A and the destination node D, DTD (AD) _ m=DTS
r(AD) _ m-DTS
s(AD) _ and m, 1≤m≤M after the two-way time delay that calculates all M OAM messages, also can further calculate the two-way average delay MDTD (AD) in the measurement period T;
(2) the two-way delay variation DDV (AD) between source node A and the destination node D, DDV (AD)=DTD (AD) _ m+1-DTD (AD) _ m, 1≤m≤M-1;
(3) the two-way packet loss DLR (AD) between source node A and the destination node D, source node A actual recovered OAM message number is M, should reclaim OAM message number can calculate from the sequence number of self collecting, as known from Table 4, the maximum sequence number that source node A collects is N-2, and minmal sequence number is 2, and this expression destination node D is actual minimum receivable to N-2-2+1=N-3 OAM message, correspondingly, source node A is to two-way packet loss DLR (the AD)=M/ (N-3) * 100% between the destination node D;
(4) the two-way unavailability DUA (AD) between source node A and the destination node D, usually, packet loss can think that greater than 25% network is unavailable, supposes that DLR (AD) is Tua (AD) greater than time of 25%, then DUA (AD)=Tua (AD)/T * 100%.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1, a kind of network for formance measuring method is characterized in that, the method comprising the steps of:
A, measured node receive at least one Operations, Administration and Maintenance OAM message that transmitting time is stabbed that carries from source node continuously, the time of reception that writes down described OAM message stabs, and preserves that the transmitting time of carrying in the described OAM message is stabbed and the time of reception stamp of self record;
B, measured node are stabbed according to the transmitting time of being preserved and time of reception stamp computing network performance index.
2, the method for claim 1 is characterized in that, further carries sequence number in the described OAM message;
Measured node described in the steps A is further preserved the sequence number that carries in the described OAM message;
Measured node described in the step B is further according to the sequence number computing network performance index of being preserved.
3, method as claimed in claim 1 or 2 is characterized in that,
Described measured node is a destination node, and network performance index described in the step B is that source node is to the unilateral network performance index between the destination node; Or
Described measured node is to be used to transmit the intermediate node of described OAM message to destination node, measured node writes down after the time of reception stamp of described OAM message in the steps A, further transmit described OAM message to destination node, network performance index described in the step B is that source node is to the unilateral network performance index between the intermediate node.
4, method as claimed in claim 2 is characterized in that, described measured node is a source node;
Further comprise before the steps A: destination node receives at least one OAM message that carries transmitting time stamp and sequence number from source node continuously, and returns the OAM message that is received and give source node;
Network performance index described in the step B is that source node is to the bilateral network performance index between the destination node.
5, method as claimed in claim 3 is characterized in that, described source node and described measured node set in advance and be time synchronized.
6, method as claimed in claim 2 is characterized in that, described transmitting time is stabbed and sequence number is carried in the existing field of described OAM message.
7, method as claimed in claim 6 is characterized in that, described OAM message is a multiprotocol label switching MPLS network OA M message.
8, method as claimed in claim 7 is characterized in that, the value of described OAM message function type field is 04, and described sequence number is carried in the reserved field of OAM message, and described transmitting time is stabbed and is carried in the filling field of described OAM message.
9, method as claimed in claim 6 is characterized in that, the OAM message that described OAM message is an IP network.
10, as each described method of claim 1 to 4, it is characterized in that described performance index are: the combination in any of time delay or delay variation or packet loss or unavailability or above index.
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| PCT/CN2006/002889 WO2007095801A1 (en) | 2006-02-24 | 2006-10-27 | A method, apparatus, and system for measuring the network performance |
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| CN112565017A (en) * | 2020-12-04 | 2021-03-26 | 盛科网络（苏州）有限公司 | Time delay measuring method and device based on SRv6 SID |
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| US6452904B1 (en) * | 1999-01-15 | 2002-09-17 | Telefonaktiebolaget L M Ericsson (Publ) | Operation and maintenance flow support for A-interface connections |
| JP2003298649A (en) * | 2002-04-04 | 2003-10-17 | Mitsubishi Electric Corp | Performance information transmission system, packet format and method for transmitting performance information |
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| CN101026504B (en) | 2011-05-11 |
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