WO2006133635A1 - Procede de mesure des parametres de performance du reseau a commutation multiprotocole par etiquette - Google Patents
Procede de mesure des parametres de performance du reseau a commutation multiprotocole par etiquette Download PDFInfo
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- WO2006133635A1 WO2006133635A1 PCT/CN2006/001288 CN2006001288W WO2006133635A1 WO 2006133635 A1 WO2006133635 A1 WO 2006133635A1 CN 2006001288 W CN2006001288 W CN 2006001288W WO 2006133635 A1 WO2006133635 A1 WO 2006133635A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0823—Errors, e.g. transmission errors
- H04L43/0829—Packet loss
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0852—Delays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0876—Network utilisation, e.g. volume of load or congestion level
- H04L43/0888—Throughput
Definitions
- the present invention relates to techniques for measuring performance parameters of a wired communication network, and more particularly to a method for measuring performance parameters of a Multi-Protocol Label Switching (MPLS) network.
- MPLS Multi-Protocol Label Switching
- the measured performance parameters are an important means to accurately understand the MPLS network service shield.
- the performance of the MPLS network can be accurately obtained through the measurement of the performance parameters. Therefore, the Internet Engineering Task Force (IETF) proposed the requirements for measuring the performance parameters of MPLS networks in the draft "draft-ietf-mpls-oam-requirements-05.txt". The following two points are mainly considered for the measurement of MPLS network performance parameters.
- IETF Internet Engineering Task Force
- MPLS network performance parameters such as frame loss parameters, frame delay parameters, and frame delay jitter parameters, which can better layout the MPLS network, improve the ability of the MPLS network to provide services, and play the MPLS network to a greater extent. Performance.
- the ITU-T Y.1711 standard of the International Telecommunication Union (ITU) defines the connectivity check, LSP cross error check and LSP aggregation error check of the label switched path (LSP) in the MPLS network, and the available state of the LSP is performed.
- Detailed regulations At present, there is no measurement implementation scheme that satisfies the above two requirements, that is, there is currently no method for measuring MPLS network performance parameters such as frame loss parameters, frame delay parameters, and frame delay jitter parameters.
- the main object of the present invention is to provide a method for measuring MPLS network performance parameters, which is capable of measuring MPLS network performance parameters.
- a method of measuring multi-protocol label switching MPLS network performance parameters comprising:
- the sender sends the performance parameter measurement message to the receiver, where the performance parameter measurement message carries information used to measure the performance parameter of the MPLS network;
- the receiver performs measurement of the corresponding MPLS network performance parameter according to the received information carried by the performance parameter measurement message.
- step B the method further includes:
- the receiver sends a response packet of the performance parameter measurement packet to the sender, where the response packet carries information used to measure the performance parameter of the MPLS network.
- the sender performs measurement of the performance parameters of the corresponding MPLS network according to the received information carried by the response message.
- the information for measuring the performance parameter of the MPLS network in step C includes a sequence number for measuring a frame loss parameter, and the sequence number is sequentially added according to the sequence of the sent response messages, and the first parameter sent to the receiver is sent.
- the serial number of the measurement message is set to 1;
- the measurement of the MPLS network performance parameter is performed as the measurement of the frame loss parameter in the step D.
- the information used in step C for measuring MPLS network performance parameters includes measuring frame loss.
- the measurement of the MPLS network performance parameter is performed as the measurement of the frame loss parameter in the step D.
- the process is: after receiving the response message, the sender calculates the information carried in the response message according to
- the information for measuring the performance parameters of the MPLS network described in step A includes a sent message counter value for measuring a frame loss parameter
- the value of the transmitted message counter in step C is the same as the value of the transmitted message counter in the performance parameter test message received in step B.
- the performance parameter measurement message is a frame loss measurement request FL-Request message; and the response message is a frame loss measurement response FL-Reply message.
- the frame loss parameter measurement enable identifier is set on the sender and the receiver. Before step A, the method further includes:
- the sender determines whether the frame loss parameter measurement enable flag is set, and if yes, performs step A; otherwise, the method is not executed;
- the method further comprises: the receiving party determining whether the frame loss parameter measurement enable flag is set, and if yes, performing step C; otherwise, the method is not performed.
- the information for measuring the performance parameter of the MPLS network in step C includes a sending timestamp for measuring a frame delay parameter, and the sending timestamp is the same as the sending timestamp for measuring the frame delay parameter in step A;
- the measurement of the performance parameter of the PLS network is performed as the measurement of the frame delay parameter in the step D.
- the process is: after the sender receives the response packet, the difference between the time of receiving the packet and the sending timestamp carried by the packet is Frame delay parameters obtained by two-way measurement.
- the measurement of the frame delay parameter is performed on the packet validity check and the frame loss parameter.
- the detection is performed after determining that no frames have been lost.
- the information for measuring the performance parameters of the MPLS network described in step C further includes a sender sending timestamp, a receiving receiving timestamp, and a receiving timestamp for measuring the frame delay parameter.
- the measurement of the performance parameter of the MPLS network is performed as the measurement of the frame delay parameter.
- the process is as follows: After receiving the response packet, the sender sends the timestamp of the packet and the sender carrying the timestamp. The difference between the difference between the receiver receiving time stamp and the receiver sending time stamp carried by the message is used as a frame delay parameter obtained by bidirectional measurement.
- the performance parameter measurement message is a frame delay measurement request FD-Request message
- the response message is a frame delay measurement response FD-Reply message.
- the frame delay parameter measurement enable identifier is set on the sender and the receiver. Before step A, the method further includes:
- the sender determines whether the frame delay parameter measurement enable flag is set, and if so, performs step A; otherwise, the method is not executed;
- the method further comprises: the receiver determining whether the frame delay parameter measurement enable flag is set, and if yes, performing step C; otherwise, the method is not performed.
- the method further includes: measuring the performance parameter of the MPLS network as measured in step D as the measurement of the frame delay jitter parameter, and the frame delay jitter parameter is the difference of the frame delay parameters of the two response packets sent in sequence.
- the number of performance parameter measurement messages in step A is more than one.
- the information used in each performance parameter packet for measuring MPLS network performance parameters includes fixed length data for measuring frame throughput parameters, and the one is sent in sequence. When the above performance parameter message is used, the transmission rate is gradually increased;
- the information for measuring MPLS network performance parameters described in step C includes fixed length data for measuring frame throughput parameters;
- the measurement of the MPLS network performance parameter is performed to measure the frame throughput parameter, and the process is: the sender determines whether a frame loss occurs, and if yes, the sending rate of the performance parameter measurement packet corresponding to the response packet is used as a measurement.
- the resulting frame throughput parameter otherwise, continue to receive response messages.
- the performance parameter measurement message is a frame throughput request LB-Req message
- the response message is a frame throughput response LB-Res message.
- the information for measuring the performance parameter of the MPLS network in step A is a sequence number for measuring a frame loss parameter, and the sequence number is sequentially added according to the sequence of the sent performance parameter measurement messages, and the first one is sent to the receiver.
- the serial number of the parameter measurement message is set to 1;
- the measurement of the MPLS network performance parameter is performed as the measurement of the frame loss parameter in step B.
- the process is: when the performance parameter measurement message is not received, the receiver sets the sequence number of the currently received performance parameter measurement message to 0.
- the receiver sets the sequence number of the currently received performance parameter measurement message to 0.
- the next serial number (currently received the serial number carried by the performance parameter measurement message + 1) mod 2 16 , where mod represents If the number is the same, the measured frame loss parameter is 0. If not, the measured frame loss parameter is based on the sequence number carried by the currently received performance parameter measurement message and the next serial number expected to be received. The difference between the determinations.
- the information used to measure the performance parameter of the MPLS network in step A is a transmission timestamp for measuring a frame delay parameter
- the measurement of the performance parameter of the MPLS network is performed as the measurement of the frame loss parameter.
- the process is as follows: After the receiver receives the performance parameter measurement packet, the difference between the time when the receiver receives the packet and the transmission timestamp carried by the packet In addition, the clock difference between the receiver and the sender is used as the measured one-way frame loss parameter.
- the method also includes:
- the measurement of the performance parameter of the MPLS network is performed in step B to measure the frame delay jitter parameter.
- the frame delay jitter parameter is the difference between the frame delay parameters of the two performance parameter measurement messages sent in sequence.
- the measurement of the frame delay parameter is performed after the message validity check and the frame loss parameter detection are performed to determine that the frame is not lost.
- the performance parameter measurement message is a loopback request message, and the response is a loopback response.
- the interval of transmitting the performance measurement message described in step A is preset.
- the present invention constructs a performance parameter measurement message for measuring the performance parameter of the MPLS network, and the performance parameter measurement message carries information for measuring the performance parameter of the MPLS network, and the performance parameter measurement message is used in the MPLS network.
- the LSP is transmitted in the LSP, so that the LSP-party performs the measurement of the MPLS network performance parameter according to the information in the performance parameter packet sent by the LSP, and the measured MPLS network performance parameter may include the frame loss parameter and the frame delay. Time parameter, frame delay jitter parameter or / and frame throughput parameter. Therefore, the method provided by the present invention is capable of measuring MPLS network performance parameters.
- FIG. 1 is a flow chart of a method for measuring performance parameters of an MPLS network according to the present invention. Mode for carrying out the invention
- the present invention sets a performance parameter measurement message, and the performance parameter measurement message can be a loopback request message or a loopback reply message.
- the structure of the loopback request packet is shown in Table 1.
- the structure of the loopback reply packet is shown in Table 2.
- the sender constructs the loopback request packet shown in Table 1 and sends it to the receiver.
- the timestamp (TimeStamp Received) may not be included, and the timestamp (TimeStamp Sent) may be sent.
- the function type (Funcition type) can be set to the type of the request message
- the path terminal source identifier (LSP TTSI) is set to the sender's identity.
- the checksum (BIP16) can be set to the check value calculated by the preset algorithm. Padding can set the MPLS LSP label so that the loopback request message can reach the receiver. .
- the receiver can obtain the unidirectional measured MPLS network performance parameter according to the carried information, and the receiver sends the measurement.
- the loopback reply packet shown in Table 2 can be configured to be sent to the sender.
- the sender can obtain the MPLS network performance parameters measured bidirectionally according to the information carried in the loopback reply packet.
- the TimeStamp Sent may not be included, and the TimeStamp Received may be set to the time-of-day of the receiver's clock.
- the Funcition type can be set to respond to the type of the message, such as 0x06, LSP TTSI is set to the identifier of the receiver, BIP16 can be set to the check value calculated by the same algorithm as the sender, and Padding can set the MPLS LSP label. So that the loopback reply message can reach the sender.
- the packet described in Table 1 or Table 2 is a packet with a Layer 2 frame encapsulation format.
- the Layer 2 frame feature is constructed according to the MPLS LSP between the sender and the receiver.
- the loopback request is reported.
- the text includes source media access control (MAC) address, virtual path (VPI) / virtual channel (VCI) and data link identification code (DLCI), and loopback reply includes the destination MAC address, VCI and DLCI.
- MAC source media access control
- VPN virtual path
- VCI virtual channel
- DLCI data link identification code
- the MPLS LSP fails to recover after entering the defect state for 10 seconds (S)
- the MPLS LSP enters the unavailable state
- the MPLS LSP recovers within the defect state 10S
- the MPLS LSP does not enter the available state, but it is possible that a frame loss occurs when transmitting a message. Therefore, in order to more accurately test the frame delay parameter, the frame jitter parameter, and the frame throughput parameter, the sequence number is set in the performance measurement message described in Table 1 and Table 2, so that the sender can follow the sequence set in the loopback reply message.
- the number measurement obtains the frame loss parameter of the receiver; the receiver measures the frame loss parameter of the sender according to the loopback request message. In this way, when the frame loss parameter of the MPLS LSP is detected, the frame delay parameter, the frame delay jitter parameter, and the frame throughput parameter are not measured, so as to obtain inaccurate MPLS network performance parameters.
- sequence number setting and processing process includes:
- the sender such as the ingress LSR, sets the sequence number in the loopback request message sent to the receiver, such as the egress LSR, and the sequence number is sent along with the loopback request.
- the sequence of the text is incremented by one, and the sequence number of the first loopback request message sent to the receiver is set to 1.
- the receiving party when receiving the initial loopback request message, that is, before receiving the first loopback request message sent by the sender, can set the expected sequence number to be 0, and subsequently receive the loopback request message in sequence. Check whether the serial number carried in the text meets the following rules:
- next serial number (currently received the sequence number carried by the loopback request message + 1) mod 2 16 , where mod represents the remainder and 2 16 is the maximum value of the sequence number, ie the sequence number of the loopback request message Circulate sequentially between 1 and 2 16 according to the order of transmission.
- the loopback request 4 received by the receiver in turn meets the above rules, it means that no frame is lost when the message is transmitted, and the frame loss parameter is 0; otherwise, the MPLS network loses the frame, and the frame loss parameter is determined according to the number of losses. .
- the sender can also determine the frame loss parameter of the message sent by the receiver.
- the receiver will send the sequence number to 1 in the order of the message sent to the sender's loopback reply message.
- the added sequence number is set in the loopback reponse message; after receiving the loopback reponse message, the sender determines the frame loss parameter of the message sent by the receiver according to the rule described in step 2).
- the sender may also set the sequence number in all the loopback request messages sent to 0 or all the loopback reply messages to be sent by the receiver.
- the serial number is set to 0 to notify the other party Detection of serial numbers is not supported.
- FIG. 1 is a flow chart of a method for measuring performance parameters of an MPLS network according to the present invention, and the specific steps are as follows:
- Step 100 The sender constructs a loopback request
- the loopback request can be constructed in multiples or only one.
- the message structure shown in Table 1 can be employed.
- a serial number such as a measure for measuring whether the message is lost.
- Step 101 The sender sends the constructed loopback request to the receiver.
- multiple loopback requests can be sent to the receiver.
- Step 102 The receiver obtains the unidirectional MPLS network performance parameter according to the received loopback request measurement.
- the receiver receives multiple loopback requests in turn, and measures the MPLS network performance parameters of the sender according to multiple loopback requests.
- the measured MPLS network performance parameters are more accurate.
- Step 103 The receiver constructs a loopback reply according to the received loopback request.
- the loopback reply loopback request is configured accordingly; when the loopback request is multiple, the loopback reply loopback request constructs one.
- the message structure shown in Table 2 can be employed.
- a serial number such as a measure for measuring whether the message is lost.
- Step 104 The receiver sends the constructed loopback reply to the sender.
- Step 105 The sender obtains the bidirectional MPLS network performance parameter according to the received loopback reply measurement.
- the sender receives multiple loopback replyes in turn, and obtains bidirectional MPLS network performance parameters according to multiple loopback reply measurements, so that the measured MPLS network performance parameters are more accurate.
- the unidirectional measurement of the MPLS network performance parameters can also be performed. At this time, steps 103 to 105 can be omitted.
- the frame delay parameter and the frame delay jitter parameter Before measuring the frame delay parameter and the frame delay jitter parameter, it can be determined that the message is not lost and then measured, so that the measured frame delay parameter and the frame delay jitter parameter are more accurate. Of course, it is also possible to directly measure the frame delay parameter and the frame delay jitter parameter without first determining whether the message is lost.
- the loopback request packet that is sent by the sender according to the packet 1 carries the TimeStamp Sent BIP16 and the Sequence Number.
- the receiver can calculate the unidirectional frame delay parameters of each loopback request in turn, and then take an average to obtain the final unidirectional frame delay parameter.
- the loopback request message sent by the sender according to Table 1 is carried in the message PT/CN2006/001288
- the receiver calculates the frame delay parameter according to the unidirectional frame delay parameter process, and constructs a loopback reply according to the information carried in the loopback request message according to Table 2.
- the packet is sent to the receiver, and the packet carries the TimeStamp Received, the BIP16, and the Sequence Number.
- the sender After receiving the loopback reply packet, the sender performs the validity check according to the BIP16 carried in the packet, and performs the validity check according to the sequence number carried in the packet. Check if the message is missing. If the packet passes the check, the unidirectional frame delay parameter is obtained according to the TimeStamp Received carried in the packet and the time when the packet is received by the packet.
- the sender can calculate the unidirectional frame delay parameters of each loopback reply in turn, and then take an average to obtain the final unidirectional frame delay parameter.
- the processing time value of the receiver's validity check may be removed in the process of calculating the frame delay parameter. Improve the accuracy of frame delay measurement.
- the invention uses the frame delay parameter obtained by one-way measurement or the frame delay parameter obtained by two-way measurement to calculate the corresponding frame delay jitter parameter.
- the frame delay jitter parameter FD2-FD1, that is, the difference of the frame delay parameters of two adjacent loopback request messages.
- the frame delay jitter parameter is FD2-FD1, which is the difference between the frame delay parameters of two adjacent loopback reply messages.
- the PT/CN2006/001288 mean is the measurement of the final frame delay jitter parameter.
- the measurement of the frame loss parameter refers to the difference between the number of loopback request 4s sent by the sender and the number of received loopback repl files within a period of time, such as 1 second.
- Frame loss parameter
- FT indicates the number of loopback request packets sent by the sender within the specified time period, such as within 1 second
- FR indicates the loopback repl message received by the sender within a specified period of time, such as within 1 second. number.
- the present invention may use a frame loss measurement (Frame Loss Measurement) message as a performance parameter measurement message, and transmit the message in an MPLS network, where the message specifically includes a frame loss measurement request (FL-Request). Packet and frame loss measurement response (FL-Reply) message, the structure is shown in Table 3:
- the present invention distinguishes between a request message and a response message by different Function types, and the Function Type of the two messages needs to be determined according to the coding in Y.1711.
- the sender that is, the Ingress LSR
- the receiver that is, the Egress LSR
- the sender are provided with frame counters for counting the transmitted and received messages, respectively.
- the frame loss parameter measurement is enabled on the Ingress LSR and the Egress LSR respectively.
- the ingress LSR periodically sends an FL-Request packet carrying the packet count value (IngressTxFrmCnt).
- the received packet count value (EgressRxFrmCnt) is meaningless.
- the egress LSR receives the FL-Request packet.
- the FL-Reply packet is sent to the Ingress LSR, and the IngressTxFrmCnt in the FL-Request packet is copied and the EgressRxFrmCnt is carried in the FL-Reply packet.
- the Ingress LSR calculates the frame loss. Parameters: FT2 - FT1) -
- the frame loss parameter measurement enable flag needs to be configured in both the ingress and the egress LSR, and the frame loss parameter measurement is determined according to the identifier parameter.
- the default value can be 100ms.
- the other field values in the message structure shown in Table 3 can be constructed according to the message structure shown in Table 1 or the message structure shown in Table 2.
- the present invention can use the frame delay measurement request (FD-equest) message and the frame delay measurement response (FD-Reply) message as the performance parameter measurement document, and the two structures are both As shown in Table 4:
- the request message and the response message are distinguished by different Function types, and the Function Type of the two messages needs to be determined according to the coding in Y.1711.
- the Ingress TimeStamp Sent in the packet shown in Table 4 refers to the time-of-day of the clock relative to the sender (relative to the time of day), and the Egress TimeStamp Sent refers to the time-of-day of the clock relative to the receiver. (relative to the time of day).
- the frame delay parameter measurement is enabled in the Ingress LSR and Egress LSR respectively.
- the Ingress LSR sends an FD-Request packet to the Ingress TimeStamp Sent.
- the Egress LSR receives the FD-Request packet and constructs the FD-Reply packet.
- the Egress LSR responds to the Ingress LSR and copies the Ingress TimeStamp Sent in the request.
- the frame delay parameter measurement enable flag on the ingress LSR and the egress LSR you need to configure the frame delay parameter measurement enable flag on the ingress LSR and the egress LSR, and determine whether to perform the frame delay parameter measurement according to the identifier parameter. Also, configure the FD-Request report in the ingress LSR.
- the sending interval of the text, the default value of this parameter can be set to 100ms.
- the other field values in the message structure shown in Table 4 can be constructed according to the message structure shown in Table 1 or the structure shown in Table 2.
- the unidirectional frame delay parameter measurement and the bidirectional frame delay measurement can be adopted. The two methods will be described separately below.
- the ingress LSRJ ⁇ _ sends an FD-Request packet.
- the packet carries the Ingress TimeStamp Sent.
- the egress LSR checks the validity of the packet. The validity check includes the check for the sequence number. If the number is not the expected sequence number of the received message, the message is ignored. If the validity check is made to confirm that the message is valid, the record is received.
- the unidirectional delay parameter is calculated by the LSP-Request time Egress TimeStamp Received and the transmission time Ingress TimeStamp Sent carried in the received FD-Request message.
- the sender and receiver clocks in the MPLS network are required to be synchronized, or the Egress LSR knows the clock difference between the sender and the receiver.
- the ingress LSR ⁇ - sends an FD-Request packet, and the ingress TimeStamp Sent is carried in the packet.
- the egress LSR constructs the FD-Reply packet. 113 ⁇ 4 633 1 ⁇ 1 received?
- the validity of the message is checked. The validity check includes the check for the serial number. When the serial number is not the expected sequence number of the received message, the message is ignored. If the validity is checked.
- the information carried in the Ingress TimeStamp Sent field indicates that the Ingress LSR sends the information.
- Timestamp of FD-Request Egress TimeStamp Received information representation of Received domain The timestamp of the FD-Reply sent by the Egress Timestamp.
- the frame delay parameter can be calculated more accurately, and the time when the receiver processes the message is no longer included.
- the frame delay jitter parameter FD2 - FD1.
- the frame delay jitter parameter FD2 - FD1.
- the throughput is related to the frame size of the transmitted message.
- the throughput can be measured by using the frame throughput request (LB-Req) message and the frame throughput response (LB-Res) message, specifically in the padding field of the packet.
- the data of different lengths is filled in, and the LB-Req transmission rate is gradually increased for each length of the packet, and whether the LB-Res is dropped is recorded.
- the transmission rate of the LB-Req packet is recorded when there is a significant frame loss, that is, the measurement result of the throughput.
- the present invention specifies the performance parameter measurement of the MPLS network, including the measurement of the frame delay parameter, the frame delay jitter parameter, the frame throughput parameter, and the frame loss parameter, and provides for planning the MPLS network.
- An important reference is provided and provides a basis for checking the compliance of SLAs in existing MPLS networks.
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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CN2006800119438A CN101160816B (zh) | 2005-06-13 | 2006-06-12 | 一种测量多协议标签交换网络性能参数的方法 |
EP06742157.8A EP1855416B2 (en) | 2005-06-13 | 2006-06-12 | A method for measurting the performance parameters of the multi-protocol label switching network |
DE602006015169T DE602006015169D1 (de) | 2005-06-13 | 2006-06-12 | Verfahren zur messung der leistungsparameter des multiprotocol-label-switching-netzwerks |
AT06742157T ATE472870T1 (de) | 2005-06-13 | 2006-06-12 | Verfahren zur messung der leistungsparameter des multiprotocol-label-switching-netzwerks |
US11/751,920 US20070242620A1 (en) | 2005-06-13 | 2007-05-22 | Method, System and Device for Measuring Performance Parameters of Multiprotocol Label Switching Network |
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CN200510076664.7 | 2005-06-13 | ||
CN200510076664 | 2005-06-13 | ||
CN200510114860.9 | 2005-11-17 | ||
CNA2005101148609A CN1881908A (zh) | 2005-06-13 | 2005-11-17 | 测量mpls网络性能参数的方法 |
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US11/751,920 Continuation US20070242620A1 (en) | 2005-06-13 | 2007-05-22 | Method, System and Device for Measuring Performance Parameters of Multiprotocol Label Switching Network |
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EP (1) | EP1855416B2 (zh) |
CN (2) | CN1881908A (zh) |
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CN1881908A (zh) | 2006-12-20 |
US20070242620A1 (en) | 2007-10-18 |
EP1855416A4 (en) | 2008-04-23 |
CN101160816B (zh) | 2011-11-02 |
DE602006015169D1 (de) | 2010-08-12 |
CN101160816A (zh) | 2008-04-09 |
EP1855416B2 (en) | 2013-11-13 |
ATE472870T1 (de) | 2010-07-15 |
EP1855416A1 (en) | 2007-11-14 |
EP1855416B1 (en) | 2010-06-30 |
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