CN106936661B - Network monitoring method, device and system - Google Patents

Abstract

The invention discloses a network monitoring method, device and system, which are used to solve the problem in the prior art that online monitoring of segmented service performance through OAM tools leads to large errors in the obtained end-to-end performance measurement results of the network. The method includes: the L3PTN device in the PTN sends a plurality of first TWAMP messages to the second device according to the L2/L3 bridge device, and the received second device returns a second TWAMP message for each received first TWAMP message The TWAMP message determines the packet loss rate and delay of the network between the first device and the second device. The method can accurately determine the packet loss rate and delay of the network between the L3PTN device and the L2PTN device, so that the L3PTN device improves the end-to-end performance monitoring accuracy of the network.

Description

A network monitoring method, device and system

technical field

The present invention relates to the field of communication technologies, and in particular, to a network monitoring method, device and system.

Background technique

In the second generation network (2nd Generation, 2G) and the third generation network (3rd Generation, 3G), the Packet Transport Network (PTN) adopts the Operation Administration and Maintenance (OAM) mechanism to proactively fail Positioning and performance monitoring.

Currently, in a Long Term Evolution (LTE) network, the PTN adopts a hybrid networking technology of a Layer 2 Virtual Private Network (L2VPN) and a Layer 3 Virtual Private Network (L3VPN). , the networks that implement end-to-end communication services (such as services based on S1 interface, services based on X2 interface, etc.) are divided into L2 PTN using L2VPN and L3 PTN using L3VPN, which are configured and operated separately. PTN and L3 PTN each run different OAM mechanisms to implement network fault location and performance detection.

For the equipment with OAM function in the L2 PTN, the OAM tool is used to measure the packet loss rate and delay in the L2 PTN to realize online monitoring of service performance; while the equipment with OAM function in the L3 PTN first needs to pass the Internet Protocol (Internet Protocol). Protocol, IP) trace query TraceRoute tool to obtain the service forwarding path in the L3 PTN, and then use the performance measurement OAM tool on the path to measure the packet loss rate and delay inside the L3 PTN to achieve service performance. Online Monitoring. Therefore, the end-to-end service performance of the LTE network is approximated by calculating the sum of the service performance measurement results of the L2 PTN and the service performance measurement results of the L3 PTN.

However, when approximately evaluating the end-to-end service performance of the LTE network by using the above-mentioned method of measuring and accumulating segments, the performance of the L2/L3 PTN bridging equipment that realizes the interconnection between the L2 PTN and the L3 PTN is not considered. The service decapsulation/encapsulation processing delay and transfer delay of the L2/L3 PTN bridge equipment cause the accumulated delay measurement results of segmental measurement, and there is a large error with the end-to-end L2PTN+L3 PTN delay of the actual network. , in addition, since the internal packet loss of the L2/L3 PTN bridging device is not considered, and L2 PTN and L3 PTN use different encapsulation/decapsulation efficiencies, the packet loss rates measured by L2PTN and L3 PTN are simply accumulated and compared with There is a large error in the packet loss rate of the actual end-to-end L2 PTN+L3 PTN.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a network monitoring method, device, and system, which are used to solve the problem of large errors in the obtained end-to-end performance measurement results of the network when performing online monitoring of segmented service performance through an OAM tool in the prior art.

In a first aspect, the embodiments of the present application provide a network monitoring method, including:

Any L3 PTN device in the PTN sends multiple first TWAMP messages to an L2 PTN device through the L2/L3 bridge device, where the destination address in the first TWAMP message is the IP address of the base station or the same network as the base station The reserved IP address of the segment; since the destination address in each first TWAMP message is the IP address of the base station or the reserved IP address of the same network segment as the base station, the L2/L3 bridging device receives each When there is a first TWAMP message, the first TWAMP message may be used as a data message to be transmitted to the base station, and forwarded, so as to be transmitted to the L2 PTN device;

After receiving a message, the L3 PTN device determines whether the message is a second TWAMP message returned by the L2 PTN device for a first TWAMP message, and if so, extracts the second TWAMP message , and save it for monitoring network performance by the L3 PTN device;

The L3 PTN device determines the number of second TWAMP packets received and the number of first TWAMP packets sent within a preset time period, and through these two numbers, determines the L3 PTN device and the L2 PTN device The packet loss rate between;

Since each first TWAMP packet includes an original timestamp indicating the time when the L3 PTN device sent the first TWAMP packet, the second TWAMP packet returned for a first TWAMP packet includes an original timestamp indicating the time when the L3 PTN device sent the first TWAMP packet The sending time stamp of the time when the L2 PTN device sent the second TWAMP message, the receiving time stamp indicating the time when the L2 PTN device received the first TWAMP message, and the original time stamp of the first TWAMP message, Therefore, the L3 PTN device determines the second TWAMP packet received within the preset time period, and extracts the original timestamp, the reception timestamp and the transmission timestamp in each of the second TWAMP packets, to determine Delay between the L3 PTN device and the L2 PTN device.

Using the above method, the L2/L3 bridge device in the PTN can forward the first TWAMP message sent by the L3 PTN device as a data message to be transmitted to the base station, so that the first TWAMP message can be smoothly transmitted to the L2PTN device to realize cross-L2 PTN/L3 PTN forwarding of TWAMP messages, and then the L2 PTN device can return the second TWAMP message after receiving the first TWAMP message, so that the L3 PTN device in the PTN can pass the first TWAMP message. The TWAMP message and the second TWAMP message accurately determine the packet loss rate and delay of the network between the L3 PTN device and the L2 PTN device, so that the L3PTN device improves the accuracy of network end-to-end performance monitoring.

In a possible design, the source address of each first TWAMP packet may be any one of the following: the IP address of the L3 PTN device, the IP address of the S-GW interconnected with the L3 PTN device, The IP address of the same network segment as the S-GW. When the source address of each first TWAMP packet is configured as the IP address of the L3 PTN device, in order to ensure that the route of the IP address is reachable, additional routes may need to be configured between the destination address and the source address; when each When the source address of the first TWAMP packet is configured as the IP address of the S-GW connected to the L3 PTN device or the IP address of the same network segment as the S-GW, because the destination address of the first TWAMP packet is The route to the source address is reachable. In this way, it can be ensured that no additional route needs to be configured when each first TWAMP packet is transmitted.

In a possible design, each first TWAMP message and each second TWAMP message include a TWAMP identifier. The TWAMP identifier is used to indicate that the packet including the TWAMP identifier is a TWAMP packet.

In a possible design, the TWAMP identifier included in each first TWAMP message and each second TWAMP message may be a TWAMP protocol identifier.

In a possible design, when determining whether the packet is a second TWAMP packet returned by the L2 PTN device for a first TWAMP packet, the L3 PTN device first determines whether the packet includes a TWAMP identifier , when it is determined that the TWAMP identifier is included, determine that the message is a TWAMP message, otherwise, determine that the message is a data message. When the L3PTN device determines that the packet is a data packet, it forwards the data packet normally; when the L3 PTN device determines that the packet is an L3 PTN packet, it further passes the source of the TWAMP packet address and destination address to determine whether the TWAMP message is the second TWAMP message.

In a possible design, when the L3 PTN device determines whether the TWAMP message is the second TWAMP message, it first takes the destination address and the source address in the TWAMP message as the two-tuple to be identified; The to-be-identified binary group is matched with multiple identification information groups stored in the L3 PTN device, and when there is an identification information group matching the to-be-identified binary group in the multiple identification information groups, determine the TWAMP message is the second TWAMP message;

The multiple identification information groups are set for the L2 PTN device, and the identification information group matching the to-be-identified binary group is a binary including the source address and destination address of the first TWAMP packet Group;

When there is no identification information group matching the to-be-identified binary group in the plurality of identification information groups, it indicates that the TWAMP message is not returned for the first TWAMP message sent by the L3 PTN device. Therefore, The L3 PTN device does not process the TWAMP message, but normally forwards the TWAMP message.

In a possible design, each first TWAMP packet further includes the transmit port number of the L3 PTN device and the reflection port number of the L2 PTN, so as to distinguish different transmit port numbers and For TWAMP packets with different reflection port numbers, correspondingly, the second TWAMP packet for a first TWAMP packet also includes the transmission port number of the L3PTN device and the reflection port number of the L2 PTN.

In a possible design, if the first TWAMP packet and the second TWAMP packet further include the transmit port number of the L3 PTN device and the reflection port number of the L2 PTN in the above design, then the L3 PTN When the device judges whether the TWAMP message is the second TWAMP message, the L3 PTN device converts the destination address, source address, the transmitting port number of the L3 PTN device and the L2 PTN device's data in the TWAMP message. The reflection port number is used as a quadruple to be identified; and the quadruple to be identified is matched with multiple identification information groups stored in the L3 PTN device, when there is a When the identification information group matched by the quadruple is to be identified, it is determined that the TWAMP message is the second TWAMP message;

The multiple identification information groups are set for the L2 PTN device, and the identification information group matching the to-be-identified quadruple is an identification information group that includes the first TWAMP message corresponding to the second TWAMP message source address and destination address, and a quadruple of the transmit port number of the L3 PTN device and the reflection port number of the L2 PTN device;

When there is no identification information group matching the to-be-identified quadruple in the plurality of identification information groups, it indicates that the TWAMP message is not returned for the first TWAMP message sent by the L3 PTN device. Therefore, The L3 PTN device does not process the TWAMP message, but normally forwards the TWAMP message.

In a possible design, when the L3 PTN device determines the packet loss rate between the L3 PTN device and the L2PTN device, it first determines the number of second TWAMP packets received within the preset time period , the number of the first TWAMP message sent in the preset time period; and determine the number of the second TWAMP message received in the preset time period and the number of the second TWAMP message sent in the preset time period The difference between the number of TWAMP packets is regarded as the number of lost packets; Packet loss rate. In this way, the L3 PTN device can accurately determine the packet loss rate of the network between the L3 PTN device and the L2 PTN device.

In a possible design, the L3 PTN device determines the time delay between the L3 PTN device and the L2PTN device. First, the difference between the received timestamp and the original timestamp in each second TWAMP packet is calculated. value, as the delay of transmitting the first TWAMP packet in the network between the L3 PTN device and the L2 PTN device, that is, the one-way transmission delay; The average value of the transmission delay; the difference between the sending timestamp and the receiving timestamp in each second TWAMP message is taken as the processing delay of the L2 PTN device processing the first TWAMP message; the obtained processing delay The average value is taken as the processing delay average value. The L3 PTN device may take the sum of twice the average value of one-way transmission delay and the average value of processing delay as the average value of two-way transmission delay. When the L3 PTN device determines the one-way delay, the delay between the L3 PTN device and the L2 PTN device is the average value of one-way transmission delay; when the L3 PTN device determines the two-way delay, the The delay between the L3PTN device and the L2 PTN device is the average value of the bidirectional transmission delay. In this way, the L3 PTN device can accurately determine the network time delay between the L3 PTN device and the L2 PTN device.

In a second aspect, the embodiments of the present application provide a network monitoring method, including:

When an L2/L3 bridging device in the PTN receives the first TWAMP packet sent by an L3 PTN device, because the destination address in the TWAMP packet is the IP address of the base station or a preset address on the same network segment as the base station leave the IP address, so the L2/L3 bridge device can forward the first TWAMP message to the L2PTN device as a data message to be transmitted to the base station;

Since the destination address of the second TWAMP packet returned by the L2 PTN device for the first TWAMP packet is the same as the source address in the first TWAMP packet, the source address of the second TWAMP packet is the same as the source address of the first TWAMP packet. The destination addresses of the TWAMP packets are the same. Therefore, the transmission path of the second TWAMP packet is the same as the transmission path of the first TWAMP packet. In this way, the L2/L3 bridge device receives the second TWAMP packet. After the text, it is forwarded to the L3 PTN device.

In a possible design, when the destination address in the first TWAMP packet is a reserved IP address in the same network segment of the base station, the L2/L3 bridge device may store the IP address and the MAC address according to the stored IP address. The mapping relationship is determined, and the MAC address corresponding to the destination address in the first TWAMP packet is determined; and the first TWAMP packet is forwarded to the L2 PTN device through the Layer 2 sub-interface corresponding to the determined MAC address.

In a third aspect, embodiments of the present application provide a network monitoring method, including:

After receiving a message, the L2 PTN device in the PTN determines whether the message is the first TWAMP message sent by the L3 PTN device, and if so, generates a second TWAMP message for forwarding for the first TWAMP message; otherwise , the packet is normally forwarded or discarded.

Since each first TWAMP message includes an original timestamp indicating the time when the L3 PTN device sent the first TWAMP message, the L2 PTN device returns a second TWAMP message for a first TWAMP message including a sending time stamp indicating the time when the L2 PTN device sent the second TWAMP message, a receiving time stamp indicating the time when the L2 PTN device received the first TWAMP message, and the first TWAMP message In this way, the L3 PTN device in the PTN can accurately determine the packet loss rate and Delay, so the L3 PTN equipment improves the accuracy of network end-to-end performance monitoring.

In a possible design, the source address in the first TWAMP packet is any one of the following: the IP address of the L3PTN device, the IP address of the S-GW interconnected with the L3 PTN, and the IP address of the L3PTN device. The IP address of the same network segment of the S-GW. When the source address of the first TWAMP packet is configured as the IP address of the L3 PTN device, in order to ensure that the route of the IP address is reachable, it may be necessary to configure an additional route between the destination address and the source address; when the When the source address of the first TWAMP packet is configured as the IP address of the S-GW connected to the L3 PTN device or the IP address of the same network segment as the S-GW, because the destination address of the first TWAMP packet is The route to the source address is reachable. In this way, it can be ensured that no additional route needs to be configured when each first TWAMP packet is transmitted.

In a possible design, each first TWAMP message and each second TWAMP message include a TWAMP identifier. The TWAMP identifier is used to indicate that the packet including the TWAMP identifier is a TWAMP packet.

In a possible design, the TWAMP identifier included in each first TWAMP message and each second TWAMP message may be a TWAMP protocol identifier.

In a possible design, when determining whether the packet is the first TWAMP packet sent by the L3PTN device, the L2 PTN device first determines whether the packet includes the TWAMP identifier, and when determining whether the packet includes the TWAMP identifier , determine that the message is a TWAMP message; otherwise, determine that the message is a data message. When the L2 PTN device determines that the packet is a data packet, it normally forwards the data packet; when the L2 PTN device determines that the packet is a TWAMP packet, it further transmits the data packet through the TWAMP packet. The source address and the destination address are used to determine whether the TWAMP message is the first TWAMP message.

In a possible design, when the L2 PTN device determines whether the TWAMP packet is the first TWAMP packet, first, the source address and the destination address in the TWAMP packet are used as the to-be-identified two-tuple ; And match in the multiple identification information groups stored in the two-tuple to be identified and the L2 PTN equipment, when there is identification information matching the two-tuple to be identified in the multiple identification information groups When grouping, it is determined that the TWAMP message is the first TWAMP message;

The plurality of identification information groups are pre-configured for the L2 PTN device, and the identification information group matching the to-be-identified binary group is a binary group including the source address and destination address of the first TWAMP packet tuple;

When there is no identification information group matching the to-be-identified binary group in the multiple identification information groups, it indicates that the TWAMP packet is not the first TWAMP packet sent by the L3 PTN device to the L2 PTN device , therefore, the L2PTN device should discard the TWAMP message.

In a possible design, each first TWAMP packet further includes the transmit port number of the L3 PTN device and the reflection port number of the L2 PTN, so as to distinguish different transmit port numbers and TWAMP packets with different reflected port numbers.

In a possible design, if the first TWAMP packet further includes the transmit port number of the L3 PTN device and the reflection port number of the L2 PTN in the above design, the L2 PTN device determines the TWAMP packet When it is the first TWAMP message, the L2 PTN device uses the source address, destination address, the transmission port number of the L3 PTN device and the reflection port number of the L2 PTN in the TWAMP message as the waiting port number. Identify the quadruple; and match the to-be-identified quadruple with multiple identification information groups stored in the L2PTN device, when there is a match with the to-be-identified quadruple in the multiple identification information groups When identifying the information group, determine that the TWAMP message is the first TWAMP message;

The multiple identification information groups are pre-configured for the L2 PTN device, and the identification information group matching the to-be-identified quadruple includes the source address, destination address, all A quadruple of the transmit port number of the L3 PTN device and the reflection port number of the L2 PTN device;

When there is no identification information group matching the to-be-identified quadruple in the multiple identification information groups, it indicates that the TWAMP packet is not sent by the reflection port of the L3 PTN device for the reflection port of the L2 PTN device The first TWAMP message, therefore, the L2 PTN device should discard the TWAMP message.

In a fourth aspect, an embodiment of the present application provides a first device, where the first device has a function of implementing the actual behavior of the L3 PTN device in the above method. The functions can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In one possible design, the first device includes:

A sending unit, configured to send multiple first bidirectional active measurement protocol TWAMP messages to a second device through a third device, where the first device is a Layer 3 packet transport network L3 PTN device, and the second device is a Layer 2 packet Transport network L2PTN device, the third device is a Layer 2/Layer 3 L2/L3 bridging device; wherein, any one of the sent multiple first TWAMP packets includes an original timestamp, and the original timestamp is The time when the sending unit sends the first TWAMP message, the destination address in the first TWAMP message is the Internet Protocol IP address of the base station, or the reserved IP address on the same network segment as the base station;

a receiving unit for receiving messages;

a determining unit, configured to, after the receiving unit receives a message, determine that the message is a second TWAMP message sent by the second device through the third device, and the second TWAMP message corresponds to the A first TWAMP message sent by the first device, the second TWAMP message includes a sending time stamp, a receiving time stamp and an original time stamp in the first TWAMP message, wherein the receiving time stamp is The time when the second device receives the first TWAMP message, the sending time stamp is the time when the second device sends the second TWAMP message, and the destination address of the second TWAMP message is the same as the second TWAMP message. The source addresses in a TWAMP message are the same, and the source address of the second TWAMP message is the same as the destination address of the first TWAMP message;

a processing unit, configured to determine the packet loss of the network between the first device and the second device according to the number of the second TWAMP packets received and the number of the first TWAMP packets sent within a preset time period rate; and

The network delay between the first device and the second device is determined according to the original timestamp, the reception timestamp and the transmission timestamp included in the second TWAMP packet received within the preset time period.

In a possible design, the structure of the first device includes a transceiver and a processor, the processor is configured to support the L3 PTN device to perform the corresponding functions in the above method, and the transceiver is configured to pass the first The third device sends the first TWAMP message to the second device, and receives messages sent by other devices. The first device may also include a memory for coupling with the processor that holds program instructions and data necessary for the first device.

In a fifth aspect, an embodiment of the present application provides a third device, where the third device has a function of implementing the behavior of the L2/L3 bridge device in practice in the foregoing method. The functions can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In one possible design, the third device includes:

A receiving unit, configured to receive a first bidirectional active measurement protocol TWAMP message sent by a first device, where the first device is a Layer 3 packet transport network L3 PTN device, and the second device is a Layer 2 packet transport network L2 PTN device , the third device is a Layer 2/Layer 3 L2/L3 bridging device; wherein, the first TWAMP message includes an original time stamp, and the original time stamp is when the first device sends the first TWAMP message The time of the message, the destination address in the first TWAMP message is the Internet Protocol IP address of the base station, or the reserved IP address on the same network segment as the base station;

a sending unit, configured to forward the first TWAMP message to the second device;

The receiving unit is further configured to receive a second TWAMP message sent by the second device, where the second TWAMP message corresponds to a first TWAMP message sent by the first device, and the second TWAMP message The text includes the sending time stamp, the receiving time stamp and the original time stamp in the first TWAMP message, wherein the receiving time stamp is the time when the second device receives the first TWAMP message, and the sending time The stamp is the time when the second device sends the second TWAMP packet, the destination address of the second TWAMP packet is the same as the source address in the first TWAMP packet, and the The source address is the same as the destination address of the first TWAMP message;

The sending unit is further configured to forward the second TWAMP message to the first device.

In a possible design, the structure of the third device includes a transceiver and a processor, the processor is configured to support the L2/L3 bridge device to perform the corresponding functions in the above method, the transceiver is used for Receive the first TWAMP message sent by the first device, and forward it to the second device; receive the second TWAMP message from the second device, and forward it to the first device. The third device may also include a memory for coupling with the processor that holds program instructions and data necessary for the third device.

In a sixth aspect, an embodiment of the present application provides a second device, where the second device has a function of implementing the actual behavior of the L2 PTN device in the above method. The functions can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In one possible design, the second device includes:

a receiving unit for receiving messages;

a determining unit, configured to, after the receiving unit receives a message, determine that the message is a first bidirectional active measurement protocol TWAMP message sent by a first device through a third device, and the first device is a layer 3 packet A transport network L3 PTN device, the second device is a Layer 2 packet transport network L2 PTN device, and the third device is a Layer 2/Layer 3 L2/L3 bridging device; wherein the first TWAMP packet includes the original Timestamp, the original timestamp is the time when the first device sends the first TWAMP packet, and the destination address in the first TWAMP packet is the Internet Protocol IP address of the base station, or the same as the base station. The reserved IP address of the network segment;

A sending unit, configured to return a second TWAMP message to the first device through the third device, where the second TWAMP message corresponds to the first TWAMP message sent by the first device, and the first TWAMP message corresponds to the first TWAMP message sent by the first device. The second TWAMP message includes a sending time stamp, a receiving time stamp, and an original time stamp in the first TWAMP message, wherein the receiving time stamp is the time when the receiving unit receives the first TWAMP message, The sending time stamp is the time when the sending unit sends the second TWAMP message, the destination address of the second TWAMP message is the same as the source address in the first TWAMP message, and the second TWAMP message is the same as the source address in the first TWAMP message. The source address of the packet is the same as the destination address of the first TWAMP packet.

In a possible design, the structure of the second device includes a transceiver and a processor, and the processor is configured to support the L2 PTN device to perform the corresponding function in the above method, and the transceiver is configured to receive the first The first TWAMP packet forwarded by the third device, and the second TWAMP packet is returned to the first device through the third device. The second device may also include a memory for coupling with the processor that holds program instructions and data necessary for the second device.

In a seventh aspect, an embodiment of the present application provides a network monitoring system, where the system includes the L3 PTN device, the L2 PTN device, and the L2/L3 bridge device described in the above aspects.

Optionally, the foregoing embodiment may be applied to an LTE network, and the foregoing first device, second device, and third device may be devices in an LTE network.

By using the network monitoring method provided by the present invention, the L2/L3 bridge device in the PTN can forward the first TWAMP message sent by the L3PTN device as a data message to be transmitted to the base station, so that the first TWAMP message can be smoothly transmitted To the L2 PTN device, the cross-L2 PTN/L3 PTN forwarding of the TWAMP message is realized, and then the L2 PTN device can return the second TWAMP message after receiving the first TWAMP message. In this way, the L3 PTN in the PTN The device can accurately determine the packet loss rate and delay of the network between the L3 PTN device and the L2 PTN device through the first TWAMP message and the second TWAMP message, so that the L3 PTN device improves the end-to-end performance of the network Monitoring accuracy.

Description of drawings

1 is a schematic diagram of a PTN network architecture according to an embodiment of the present invention;

FIG. 2 is a flowchart of a network monitoring method on a first device side provided by an embodiment of the present invention;

3 is a flowchart of a network monitoring method on a third device side provided by an embodiment of the present invention;

4 is a flowchart of a network monitoring method on a second device side provided by an embodiment of the present invention;

5 is a schematic structural diagram of a first device provided by an embodiment of the present invention;

6 is a schematic structural diagram of a third device according to an embodiment of the present invention;

7 is a schematic structural diagram of a second device provided by an embodiment of the present invention;

8 is a schematic diagram of a network monitoring system according to an embodiment of the present invention;

9 is a schematic structural diagram of a first device provided by an embodiment of the present invention;

10 is a schematic structural diagram of a third device according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a second device according to an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The embodiments of the present invention provide a network monitoring method, device, and system, which can solve the problem that in the prior art, in the LTE network, online monitoring of segmented service performance is performed through an OAM tool, resulting in a large error in the obtained end-to-end performance measurement results of the network. It can also be used in other scenarios for OAM measurement across Layer 2 and Layer 3 networks. Among them, the method and the device are based on the same inventive concept. Since the principle of the method and the device for solving problems is similar, the implementation of the device and the method can be referred to each other, and repeated descriptions will not be repeated.

According to the technical solution of the embodiment of the present invention, the first device in the PTN sends a plurality of first two-way active measurement protocol (Two Way Active Measurement Protocol, TWAMP) messages to the second device through the third device, and each first TWAMP message The text includes an original timestamp indicating the time when the first device sent the first TWAMP message; the second device, after receiving each first TWAMP message, sends the message to the The first device returns a second TWAMP message, where the second TWAMP message corresponds to the first TWAMP message. The second TWAMP message includes the original timestamp, the receiving timestamp and the sending timestamp in the first TWAMP message. The first device is an L3PTN device, the second device is an L2 PTN device, and the third device is an L2/L3 bridge device, because the destination address in the first TWAMP packet is the IP address of the base station Or a reserved IP address on the same network segment as the base station, so that the third device can directly transmit the first TWAMP message to the second device as a data message that needs to be transmitted to the base station, and further, the The second device can reply to the second TWAMP message for the received first TWAMP message, and finally, the first device determines the number of the second TWAMP message received within the preset time period and the first TWAMP message sent. The difference of the number of packets is taken as the number of lost packets, and the quotient of the number of lost packets and the number of the first TWAMP packets sent is taken as the packet loss of the network between the first device and the second device and according to the difference between the receiving timestamp and the original timestamp included in the second TWAMP message received within the preset time period, and the difference between the sending timestamp and the receiving timestamp, determine the first timestamp. Latency of the network between a device and the second device. In this way, the L3PTN device in the PTN can accurately determine the packet loss rate and delay of the network between the L3 PTN device and the L2 PTN device through the first TWAMP message and the second TWAMP message, so that the L3 PTN equipment improves the accuracy of network end-to-end performance monitoring.

The network monitoring method provided by the embodiment of the present invention can be applied to any PTN network architecture, such as the network architecture for realizing end-to-end S1 service, the network architecture for realizing end-to-end X2 service, and other complex provincial metropolitan area networks, City-level metropolitan area network, etc. The present invention does not limit this. In the following embodiments of the present invention, only a network architecture for implementing an end-to-end S1 service is used for illustration.

The network monitoring method provided by the embodiment of the present invention can be applied to the PTN network architecture as shown in FIG. 1 , and the network architecture can realize the end-to-end S1 service. The network architecture includes: base stations, L2 PTN equipment, L2/L3 bridging equipment, L3 PTN equipment, and core network equipment, such as Service-Gateway (S-GW), Mobility Management Entity (MME, MME) ) and core network control equipment, etc. Wherein, the L2 PTN device is a network device having the same function as a switch, and the L3 PTN device is a network device having the same function as a router. The base station communicates with the core network equipment via the L2 PTN equipment, the L2/L3 bridge equipment, and the L3 PTN equipment in sequence. In the PTN network architecture, the PTN network shown in FIG. 1 is divided into L2 PTN and L3 PTN, the equipment that deploys L2VPN in L2 PTN is L2PTN equipment, and the equipment that deploys L3VPN in L3 PTN equipment is L3 PTN equipment.

In this network architecture, when implementing network monitoring, any L3 PTN device can send multiple first TWAMP messages to any L2 PTN device at the end of the PTN that is connected to the base station in the network architecture. The destination address in the first TWAMP message is the IP address of the base station or a reserved IP address on the same network segment as the base station, so that the L2/L3 bridge device in the PTN can use the first TWAMP message as the need to transmit The data packet to the base station is forwarded and transmitted to the L2 PTN device, so that when the receiver receives a first TWAMP packet forwarded by the L2/L3 bridge The L2/L3 bridge device returns a second TWAMP message corresponding to the first TWAMP message. Since the first TWAMP packet includes the original timestamp of the first TWAMP packet sent by the first device, the second TWAMP packet returned for the first TWAMP packet also includes the original timestamp in the first TWAMP packet Timestamp, Receive Timestamp, and Send Timestamp. In this way, the L3 PTN device determines the network between the L3 PTN device and the L2 PTN device according to the number of the second TWAMP packets received and the number of the first TWAMP packets sent within the preset time period the packet loss rate; the L3 PTN device determines the L3 The network delay between the PTN device and the L2 PTN device.

In the PTN network architecture shown in Figure 1, any L3 PTN device can accurately determine the network connection between the L3 PTN device and any L2 PTN device through the first TWAMP message and the second TWAMP message. Packet loss rate and delay, so L3 PTN equipment improves the accuracy of network end-to-end performance monitoring.

Referring to FIG. 2 , a network monitoring method provided by an embodiment of the present invention is applied to any L3 PTN device in a PTN network, such as a router, other network devices having the same function as a router, and so on. For example, the method can be applied to the network architecture shown in FIG. 1 . The method includes:

S201: A first device in the PTN sends multiple first TWAMP packets to a second device through a third device, where the first device is an L3 PTN device, the second device is an L2 PTN device, and the third device is an L2/L3 bridging device; wherein, any first TWAMP message in the sent multiple first TWAMP messages includes an original time stamp, and the original time stamp is the first TWAMP sent by the first device The time of the message, and the destination address of the first TWAMP message is the IP address of the base station or a reserved IP address on the same network segment as the base station.

Optionally, the second device is an L2 PTN device interconnected with the base station.

Optionally, when the first device sends multiple first TWAMP packets, the time interval between sending two first TWAMP packets is milliseconds (ms), and can reach 0.1 ms. The device may send a larger number of first TWAMP packets in one monitoring period. Because the number of first TWAMP packets sent by the first device increases, the first device subsequently receives the second TWAMP packet returned by the second device. In this way, according to the number of received second TWAMP packets and the number of sent first TWAMP packets, the packet loss rate of the network between the first device and the second device is obtained. The accuracy is higher, and the accuracy of the obtained packet loss rate is guaranteed.

Optionally, the first device starts to send a plurality of first TWAMP messages to the second device after a first time interval from the last network monitoring interval, and stops when at least one of the following conditions is satisfied: Send the first TWAMP message to the second device:

(1) After continuously sending a set number of first TWAMP messages;

(2) After continuing to send the set second duration;

(3) After receiving the instruction to stop sending the first TWAMP message sent by the management device. The management device may be a network management system or other control devices.

Optionally, the first device may also send multiple first TWAMP packets to the second device within a specified time period within a set period. The set period may also be configured by the management device, and the set period may be one day, one week, etc., which is not limited in this application.

Traditionally, because only the internal network elements of the L3 PTN can identify TWAMP packets, the L2/L3 bridge device in the PTN network cannot forward the TWAMP packets across the L2 PTN/L3 PTN. Therefore, the L3 PTN device in the PTN network passes the TWAMP session. When monitoring network performance, you can only monitor the network performance between any two NEs in the IP network (ie, L3 PTN), but cannot directly monitor the network performance between one NE in the L2 PTN and one NE in the L3 PTN .

In S201, although the first device sends the first TWAMP message to the second device, the destination address of the first TWAMP message is the IP address of the base station or a preset address on the same network segment as the base station. In this way, during the transmission process of the first TWAMP packet, the L2/L3 bridge device between the first device and the second device can use the first TWAMP packet as the need to transmit the first TWAMP packet to The data message of the base station is forwarded, so that the first TWAMP message can be smoothly transmitted to the second device, and the TWAMP message can be forwarded across L2 PTN/L3 PTN.

Optionally, the source address in any one of the first TWAMP messages in the sent multiple first TWAMP messages may be any of the following:

The IP address of the first device, the IP address of the S-GW interconnected with the first device, and the IP address of the same network segment as the S-GW.

In S201, the source address of each first TWAMP packet may be configured as the IP address of the first device, or may be configured as the IP address of the non-first device, but it is necessary to ensure that the route of the IP address is reachable. Optionally, configure the source address of each first TWAMP packet as the IP address of the first device, which may require configuring an additional route between the destination address and the source address. Optionally, the source address of each first TWAMP packet can be configured as the IP address of the S-GW connected to the first device or the IP address of the same network segment of the S-GW, because the first TWAMP The route between the destination address and the source address of the packet is reachable. In this way, it can be ensured that no additional route needs to be configured when each first TWAMP packet is transmitted.

Optionally, any one of the multiple first TWAMP messages sent further includes the transmission port number of the first device and the reflection port number of the second device, which are used to indicate The first TWAMP packet is sent through the port corresponding to the transmission port number of the first device, and returned through the port corresponding to the reflection port number of the second device.

S202: After receiving a packet, the first device determines that the packet is a second TWAMP packet sent by the second device through the third device, and the second TWAMP packet corresponds to the first A first TWAMP packet sent by a device, the first TWAMP packet includes a sending timestamp, a receiving timestamp, and an original timestamp in the first TWAMP packet, where the receiving timestamp is the first TWAMP packet. The time when the second device receives the first TWAMP message, the sending time stamp is the time when the second device sends the second TWAMP message, and the destination address of the second TWAMP message is the same as the first TWAMP message. The source addresses in the text are the same, and the source address of the second TWAMP packet is the same as the destination address of the first TWAMP packet.

The second device supports responding to the first TWAMP message, and returns a second TWAMP message for a received first TWAMP message, wherein the first TWAMP message returned by the second device can determine for which The first TWAMP message is replied.

Wherein, the source address in the second TWAMP message returned for a first TWAMP message is the destination address in the first TWAMP message; the destination address in the second TWAMP message returned for a first TWAMP message is the source address in the first TWAMP packet. In this way, it can be ensured that the second TWAMP message returned for a first TWAMP message can be returned to the first device according to the transmission path of the first TWAMP message.

Optionally, in S202, the first device determines that the message is the second TWAMP message sent by the second device, including:

When the first device determines that the message includes a TWAMP identifier, determining that the message is a TWAMP message;

The first device determines that the TWAMP message is the second TWAMP message according to the source address and the destination address in the TWAMP message.

Optionally, the TWAMP identifier may be a TWAMP protocol identifier. The first TWAMP message includes a TWAMP identifier. The second TWAMP message includes a TWAMP identifier. The TWAMP identifier is used to indicate that the packet including the TWAMP identifier is a TWAMP packet. Therefore, when the first device does not detect the TWAMP identifier in the message, it normally forwards the message.

Optionally, the first device determines that the TWAMP message is the second TWAMP message according to the source address and destination address in the TWAMP message, including:

The first device uses the destination address and the source address in the TWAMP message as the two-tuple to be identified;

When there is an identification information group matching the to-be-identified binary group in the stored identification information groups, determine that the TWAMP message is the second TWAMP message;

The multiple identification information groups are set for the second device, and the identification information group matching the to-be-identified binary group is a binary including the source address and destination address of the first TWAMP message Group;

When there is no identification information group matching the to-be-identified binary group in the stored identification information groups, the first device normally forwards the TWAMP message.

Optionally, when any one of the multiple first TWAMP messages sent further includes the transmission port number of the first device and the reflection port number of the second device, the corresponding The second TWAMP message also includes the transmission port number of the first device and the reflection port number of the second device;

The first device determines that the TWAMP message is the second TWAMP message according to the source address and destination address in the TWAMP message, including:

The first device uses the destination address, the source address, the transmission port number of the first device and the reflection port number of the second device in the TWAMP message as a quadruple to be identified;

When there is an identification information group matching the to-be-identified quadruple in the stored identification information groups, determine that the TWAMP message is the second TWAMP message;

The plurality of identification information groups are set for the second device, and the identification information group matching the to-be-identified quadruple is an identification information group including a first TWAMP message corresponding to the second TWAMP message source address and destination address, and a quadruple of the transmit port number of the first device and the reflection port number of the second device;

When no identification information group matching the to-be-identified quadruple exists in the stored identification information groups, the first device normally forwards the TWAMP message.

Optionally, the multiple identification information groups are delivered and configured by the management device to the first device.

When a first TWAMP packet includes the transmission port number of the first device and the reflection port number of the second device, correspondingly, the second TWAMP packet corresponding to the first TWAMP packet also includes the first TWAMP packet. The transmit port number of one device and the reflection port number of the second device. In this way, when the first device receives the TWAMP message, it can use the source address and destination address of the first TWAMP message, as well as the transmission port number of the first device and the reflection port number of the second device. By matching the four tuples, the TWAMP packets including the same source address and destination address but with different transmission port numbers and reflection port numbers can be distinguished, avoiding other transmission ports of the first device or other L3PTN devices. The TWAMP message returned by the transmitted TWAMP message is mistakenly determined by the first device to be the second TWAMP message, which in turn leads to a relationship between the first device and the second device determined by the first device. The packet loss rate and delay error of the network are relatively large.

S203: The first device determines, according to the number of second TWAMP packets received and the number of first TWAMP packets sent within a preset time period, the network connection between the first device and the second device. packet loss rate; and according to the original timestamp, the receiving timestamp and the sending timestamp included in the second TWAMP message received within the preset time period, determine the difference between the first device and the second device. network delay.

Optionally, the first device determines the packet loss rate of the network between the first device and the second device, including:

The first device determines the packet loss rate of the network between the first device and the second device according to the set first monitoring period.

Optionally, the preset time period may be the first monitoring period, or a specified time period set according to a specific application scenario. The first device determines the number of second TWAMP messages received within the preset time period, the number of first TWAMP messages sent within the preset time period, and determines the preset time period The difference between the number of second TWAMP packets received in the segment and the number of first TWAMP packets sent within the preset time period is taken as the number of lost packets, and the number of lost packets is compared with the number of first TWAMP packets sent The quotient of the number of packets is used as the packet loss rate of the network between the first device and the second device.

Optionally, the first device determines the network delay between the first device and the second device, including:

The first device determines the network delay between the first device and the second device according to the set second monitoring period.

Optionally, the preset time period may also be the second monitoring period. The first device determines all second TWAMP messages received within the preset time period. Optionally, the difference between the received timestamp and the original timestamp in each second TWAMP packet is used as the delay in transmitting the first TWAMP packet on the network between the first device and the second device , that is, the one-way transmission delay; take the average of the obtained one-way transmission delays as the average one-way transmission delay; and take the difference between the sending timestamp and the receiving timestamp in each second TWAMP message as The second device processes the processing delay of the first TWAMP packet; the obtained processing delay is averaged as the average processing delay. Optionally, the first device may also use the sum of twice the average value of the one-way transmission delay and the average value of the processing delay as the average value of the two-way transmission delay.

The delay of the network between the first device and the second device may be the average value of one-way transmission delay determined by the first device or the average value of the two-way transmission delay, or the like.

Obviously, both the first monitoring period and the second monitoring period are greater than the time interval between two first TWAMP messages, and the greater the quotient of the first monitoring period and the time interval, the greater the quotient of the first monitoring period and the time interval. The higher the accuracy of the packet loss rate determined by a device, and similarly, the greater the quotient of the second monitoring period and the time interval, the higher the accuracy of the delay determined by the first device. Wherein, the first monitoring period and the second monitoring period may take the same value. The first monitoring period and the second monitoring period may be configured for the management device.

Optionally, after S203, it also includes:

The first device reports the determined packet loss rate of the network between the first device and the second device and the delay of the network between the first device and the second device to the management equipment.

The management device may perform statistics according to the packet loss rate and delay reported by the first device, and generate a connectivity detection report and an online monitoring report of performance such as packet loss rate, delay, and jitter, and report on the packet loss rate or delay. When the delay is abnormal, an alarm is issued, and the problem of the alarm and the corresponding second device are pointed out.

In the above embodiment, a third device, an L2/L3 bridge device, is included between the first device and the second device. That is, the first TWAMP packet and the second TWAMP packet transmitted between the first device and the second device need to be forwarded by the third device, that is, the first device is sending to the second device. The first TWAMP message needs to be forwarded to the second device through the third device. When the first device receives the second TWAMP message returned by the second device, it needs to be forwarded through the third device. forwarded.

the third device, configured to receive the first TWAMP packet sent by the first device, and forward the received first TWAMP packet to the second device; and configured to receive the second device send the second TWAMP message, and forward the second TWAMP message to the first device.

The third device forwards the received first TWAMP message to the second device. When the destination address in the first TWAMP message is the IP address of the base station, the third device can directly forward the received first TWAMP message to the second device. forwarding the first TWAMP message;

When the destination address in the first TWAMP packet is the reserved IP address of the same network segment of the base station, the third device forwards the first TWAMP packet to the second device, including:

The third device determines the MAC address corresponding to the destination address in the first TWAMP message according to the mapping relationship between the stored IP address and the media access control (Media Access Control, MAC) address; and corresponds to the determined MAC address. The Layer 2 sub-interface forwards the first TWAMP packet to the second device.

The mapping relationship between the IP address and the MAC address stored in the third device may be pre-configured by the management device for the third device.

When the third device forwards the received second TWAMP packet to the first device, regardless of whether the source address in the second TWAMP packet is the IP address of the base station or the IP address of the base station on the same network segment The IP address is reserved, and the third device can directly forward the second TWAMP message.

To sum up, using the network monitoring method in the above-mentioned embodiments of the present invention, the L3 PTN device in the PTN sends the first TWAMP message including the original timestamp, and receives the The second TWAMP message of the L3 PTN device can accurately obtain the network delay and packet loss rate between the L3 PTN device and the L2 PTN device, and finally realize the high-precision online monitoring of the end-to-end delay and packet loss rate in the PTN. Improves the accuracy of network end-to-end performance detection.

Referring to FIG. 3 , a network monitoring method provided by an embodiment of the present invention is applied to an L2/L3 bridging device in any PTN network architecture. For example, the method can be applied to the L2/L3 bridge device in the network architecture shown in FIG. 1 . The processing flow of this method includes:

S301: A third device in the PTN receives a first TWAMP packet sent by a first device, and forwards the first TWAMP packet to a second device, where the first device is an L3 PTN device, and the second device is an L2 PTN device, and the third device is an L2/L3 bridge device; wherein, the first TWAMP message includes an original timestamp, where the original timestamp is the first TWAMP sent by the first device The time of the message, and the destination address in the first TWAMP message is the IP address of the base station or a reserved IP address on the same network segment as the base station.

Wherein, the second device is an L2 PTN device connected to the base station.

Optionally, when the destination address in the first TWAMP packet is a reserved IP address of the same network segment of the base station, the third device forwards the first TWAMP packet to the second equipment, including:

The third device determines the MAC address corresponding to the destination address included in the first TWAMP message according to the stored mapping relationship between the IP address and the MAC address; and

The first TWAMP packet is forwarded to the second device through the Layer 2 sub-interface corresponding to the determined MAC address.

The mapping relationship between the IP address and the MAC address stored in the third device may be pre-configured by the management device for the third device.

S302: The third device receives the second TWAMP packet sent by the second device, and forwards the second TWAMP packet to the first device, where the second TWAMP packet corresponds to the first device A first TWAMP packet sent by a device, the second TWAMP packet includes a sending timestamp, a receiving timestamp, and an original timestamp in the first TWAMP packet, where the receiving timestamp is the first TWAMP packet. The time when the second device receives the first TWAMP message, the sending time stamp is the time when the second device sends the second TWAMP message, and the destination address of the second TWAMP message is the same as the first TWAMP message The source addresses in the packets are the same, and the source address of the second TWAMP packet is the same as the destination address of the first TWAMP packet.

Since the destination address in the first TWAMP packet is the IP address of the base station, or a reserved IP address on the same network segment as the base station, in S301, the third device may send the first TWAMP The message is forwarded as a data message to be transmitted to the base station. Since the destination address and source address of the TWAMP message and the first TWAMP message are exchanged, the third device is forwarding the second TWAMP message. In the case of a TWAMP message, the second TWAMP message is also used as a data message in the uplink direction to be transmitted by the base station, and forwarded.

In the traditional PTN online monitoring method, the L2 PTN and L3 PTN use OAM tools to measure their own internal delay and packet loss rate respectively. Therefore, the service performance of the entire end-to-end PTN is measured by calculating the LSP performance of the L2 PTN. The results are approximated by the sum of the L3 PTN performance measurements. In this way, since the measured service performance does not take into account the delay and packet loss caused by the L2/L3 bridging device, there is a large error between the measured service performance and the actual service performance. In the implementation of this application, the L2/L3 bridge The device is used to forward the first TWAMP message and the second TWAMP message of the network between the first device and the second device, so that the first device can accurately obtain the first TWAMP message and the second TWAMP message according to the The delay and packet loss rate of the network between the first device and the second device, thereby improving the accuracy of end-to-end performance detection of the network.

Referring to FIG. 4 , a network monitoring method provided by an embodiment of the present invention is applied to an L2 PTN device connected to a base station in any PTN network. For example, the method can be applied to the L2 PTN device docked with the base station in the network architecture shown in FIG. 1 . The method includes:

S401: After receiving a packet, the second device in the PTN determines that the packet is a first TWAMP packet sent by the first device through a third device, the first device is an L3 PTN device, and the second device is an L3 PTN device. The device is an L2 PTN device, and the third device is an L2/L3 bridge device, wherein the first TWAMP packet includes an original timestamp, and the original timestamp is when the first device sends the first TWAMP packet the time of the message, the destination address in the first TWAMP message is the Internet Protocol IP address of the base station or a reserved IP address on the same network segment as the base station.

Optionally, the source address in the first TWAMP packet is any of the following:

The IP address of the first device, the IP address of the serving gateway S-GW interconnected with the first device, and the IP address of the same network segment as the S-GW.

Optionally, the second device determines that the message is the first TWAMP message sent by the first device, including:

When the second device determines that the message includes a TWAMP identifier, determining that the message is a TWAMP message;

The second device determines that the TWAMP message is the first TWAMP message according to the source address and the destination address in the TWAMP message.

Optionally, the TWAMP identifier may be a TWAMP protocol identifier, which is used to notify the second device that the received message is a TWAMP message. Therefore, when the second device does not detect the TWAMP identifier in the packet, it normally forwards the packet.

Optionally, the second device determines that the TWAMP message is the first TWAMP message according to the source address and destination address in the TWAMP message, including:

The second device uses the source address and the destination address in the TWAMP message as the two-tuple to be identified;

When there is an identification information group matching the to-be-identified binary group in the stored identification information groups, determine that the TWAMP message is the first TWAMP message;

The plurality of identification information groups are pre-configured for the second device, and the identification information group matching the to-be-identified binary group is a binary group including the source address and destination address of the first TWAMP message tuple;

When there is no identification information group matching the to-be-identified binary group in the stored identification information groups, the second device discards the TWAMP message.

Optionally, when the first TWAMP packet further includes the transmission port number of the first device and the reflection port number of the second device, the second device can address and destination address, and determine that the TWAMP message is the first TWAMP message, including:

The second device uses the source address, the destination address, the transmission port number of the first device and the reflection port number of the second device in the TWAMP message as a quadruple to be identified;

When there is an identification information group matching the to-be-identified quadruple in the stored identification information groups, determine that the TWAMP message is the first TWAMP message;

The multiple identification information groups are pre-configured for the second device, and the identification information group matching the to-be-identified quadruple includes the source address, destination address, all A quadruple of the transmit port number of the first device and the reflection port number of the second device;

When there is no identification information group matching the to-be-identified quadruple among the stored identification information groups, the second device discards the TWAMP message.

Optionally, the multiple identification information groups are delivered and configured by the management device to a User Networks Interface (UNI) port of the second device.

S402: The second device returns a second TWAMP packet to the first device through the third device, where the second TWAMP packet corresponds to the first TWAMP packet sent by the first device, and the The second TWAMP message includes a sending time stamp, a receiving time stamp, and an original time stamp in the first TWAMP message, where the receiving time stamp is when the second device receives the first TWAMP message time, the sending time stamp is the time when the second device sends the second TWAMP message, the destination address of the second TWAMP message is the same as the source address in the first TWAMP message, so The source address of the second TWAMP message is the same as the destination address of the first TWAMP message.

In the above manner, each time the second device receives a first TWAMP message sent by the first device, it returns a corresponding second TWAMP message to the first device for the first TWAMP message. The device can accurately determine the packet loss rate and delay of the network between the first device and the second device through the first TWAMP packet and the second TWAMP packet, thereby improving the end-to-end performance detection of the network. Accuracy.

Based on the above embodiment, the present invention further provides a first device, the first device may be the first device described in FIG. 2 , or may execute the method performed by the first device in the embodiment corresponding to FIG. 2 , so The first device described above is applied in the PTN. For example, the first device may be the L3 PTN device shown in FIG. 1 . Referring to FIG. 5, the first device 500 includes: a sending unit 501, a receiving unit 502, a determining unit 503 and a processing unit 504, wherein,

A sending unit 501 is configured to send multiple first TWAMP messages to a second device through a third device, where the first device 500 is an L3 PTN device, and the second device is an L2 PTN device, such as the L2 PTN in FIG. 1 device; the third device is an L2/L3 bridging device, such as the L2/L3 bridging device shown in FIG. 1 ; wherein, any first TWAMP message in the plurality of first TWAMP messages includes the original time The original timestamp is the time when the sending unit 501 sends the first TWAMP message, and the destination address in the first TWAMP message is the IP address of the base station or the reserved IP address on the same network segment as the base station address;

a receiving unit 502, configured to receive a message;

The determining unit 503 is configured to, after the receiving unit 502 receives a message, determine that the message is a second TWAMP message sent by the second device through the third device, the second TWAMP message Corresponding to a first TWAMP message sent by the first device 500, the second TWAMP message includes a sending time stamp, a receiving time stamp, and an original time stamp in the first TWAMP message, wherein the receiving time stamp The timestamp is the time when the second device receives the first TWAMP packet, the sending timestamp is the time when the second device sends the second TWAMP packet, and the destination address of the second TWAMP packet Same as the source address in the first TWAMP message, the source address of the second TWAMP message is the same as the destination address of the first TWAMP message;

The processing unit 504 is configured to determine the network between the first device 500 and the second device according to the number of the second TWAMP packets received and the number of the first TWAMP packets sent within the preset time period. packet loss rate; and

Determine the network delay between the first device 500 and the second device according to the original timestamp, the receiving timestamp and the sending timestamp included in the second TWAMP packet received within the preset time period .

Optionally, the source address in any one of the first TWAMP messages in the sent multiple first TWAMP messages is any of the following:

The IP address of the first device 500, the IP address of the S-GW interconnected with the first device 500, and the IP address of the same network segment as the S-GW.

Optionally, the determining unit 503 is specifically configured to:

When determining that the message includes a TWAMP identifier, determining that the message is a TWAMP message;

According to the source address and the destination address in the TWAMP message, it is determined that the TWAMP message is the second TWAMP message.

Optionally, when determining that the TWAMP message is the second TWAMP message according to the source address and the destination address in the TWAMP message, the determining unit 503 is specifically configured to:

Taking the destination address and source address in the TWAMP message as the two-tuple to be identified;

When there is an identification information group matching the to-be-identified binary group in the stored identification information groups, determine that the TWAMP message is the second TWAMP message;

The multiple identification information groups are set for the second device, and the identification information group matching the to-be-identified binary group is a binary including the source address and destination address of the first TWAMP message Group.

Optionally, any one of the first TWAMP messages in the sent multiple first TWAMP messages also includes the transmission port number of the first device 500 and the reflection port number of the second device;

The second TWAMP message further includes the transmission port number of the first device 500 and the reflection port number of the second device;

The determining unit 503, when determining that the TWAMP message is the second TWAMP message according to the source address and the destination address in the TWAMP message, is specifically configured to:

Taking the destination address, source address, the transmission port number of the first device 500 and the reflection port number of the second device in the TWAMP message as a quadruple to be identified;

When there is an identification information group matching the to-be-identified quadruple in the stored identification information groups, determine that the TWAMP message is the second TWAMP message;

The plurality of identification information groups are set for the second device, and the identification information group matching the to-be-identified quadruple is an identification information group including a first TWAMP message corresponding to the second TWAMP message The source address and the destination address, and a quadruple of the transmit port number of the first device 500 and the reflection port number of the second device.

Based on the above embodiment, the present invention further provides a third device, which may adopt the method provided by the embodiment corresponding to FIG. 3 , and the third device is applied in the PTN. The third device may be the L2/L3 bridge device shown in FIG. 1 . Referring to Fig. 6, the third device 600 includes: a receiving unit 601, and a sending unit 602, wherein,

A receiving unit 601, configured to receive a first TWAMP message sent by a first device, where the first device is an L3 PTN device, such as the L3 PTN device in FIG. 1 , and the second device is an L2 PTN device, such as the L3 PTN device in FIG. 1 . L2 PTN device, the third device 600 is an L2/L3 bridge device; wherein, the first TWAMP packet includes an original timestamp, and the original timestamp is when the first device sends the first TWAMP packet time, the destination address in the first TWAMP message is the IP address of the base station or the reserved IP address on the same network segment as the base station;

a sending unit 602, configured to forward the first TWAMP message to a second device;

The receiving unit 601 is further configured to receive a second TWAMP message sent by the second device, where the second TWAMP message corresponds to a first TWAMP message sent by the first device, and the second TWAMP message corresponds to a first TWAMP message sent by the first device. The message includes a sending time stamp, a receiving time stamp, and an original time stamp in the first TWAMP message, where the receiving time stamp is the time when the second device receives the first TWAMP message, and the sending time stamp is the time when the second device receives the first TWAMP message. The timestamp is the time when the second device sends the second TWAMP packet, the destination address of the second TWAMP packet is the same as the source address in the first TWAMP packet, and the second TWAMP packet The source address is the same as the destination address of the first TWAMP message;

The sending unit 602 is further configured to forward the second TWAMP packet to the first device.

Optionally, when the destination address in the first TWAMP message is a reserved IP address of the same network segment of the base station, the third device 600 further includes:

Determining unit 603, configured to determine the MAC address corresponding to the destination address in the first TWAMP message according to the mapping relationship between the stored IP address and the media access control MAC address;

The sending unit 602 is specifically configured to forward the first TWAMP packet to the second device through the Layer 2 sub-interface corresponding to the determined MAC address.

Based on the above embodiment, the present invention also provides a second device, which can adopt the method provided by the embodiment corresponding to FIG. 4 . Referring to FIG. 7 , the second device 700 includes: a receiving unit 701, Determining unit 702, and sending unit 703, wherein,

a receiving unit 701, configured to receive a message;

The determining unit 702 is configured to, after the receiving unit 701 receives a message, determine that the message is the first TWAMP message sent by the first device through the third device, where the first device is an L3 PTN device, so The second device 700 is an L2PTN device, and the third device is an L2/L3 bridging device; wherein, the first TWAMP packet includes an original timestamp, and the original timestamp is when the first device sends the The time of the first TWAMP message, the destination address in the first TWAMP message is the IP address of the base station, or the reserved IP address on the same network segment as the base station;

A sending unit 703, configured to return a second TWAMP message to the first device through the third device, where the second TWAMP message corresponds to the first TWAMP message sent by the first device, the The second TWAMP message includes a sending time stamp, a receiving time stamp, and an original time stamp in the first TWAMP message, where the receiving time stamp is the time when the receiving unit 701 receives the first TWAMP message. time, the sending time stamp is the time when the sending unit 703 sends the second TWAMP message, the destination address of the second TWAMP message is the same as the source address in the first TWAMP message, the The source address of the second TWAMP packet is the same as the destination address of the first TWAMP packet.

Optionally, the source address in the first TWAMP packet is any of the following:

The IP address of the first device, the IP address of the serving gateway S-GW interconnected with the first device, and the IP address of the same network segment as the S-GW.

Optionally, the determining unit 702 is specifically configured to:

When determining that the message includes a TWAMP identifier, determining that the message is a TWAMP message;

According to the source address and the destination address in the TWAMP message, it is determined that the TWAMP message is the first TWAMP message.

Optionally, when determining that the TWAMP message is the first TWAMP message according to the source address and destination address in the TWAMP message, the determining unit 702 is specifically configured to:

Taking the source address and destination address in the TWAMP message as the two-tuple to be identified;

When there is an identification information group matching the to-be-identified binary group in the stored identification information groups, determine that the TWAMP message is the first TWAMP message;

The plurality of identification information groups are pre-configured for the second device 700, and the identification information group matching the to-be-identified binary group includes the source address and destination address of the first TWAMP packet 2-tuple.

Optionally, the first TWAMP message further includes the transmission port number of the first device and the reflection port number of the second device 700;

The determining unit 702, when the second device 700 determines that the TWAMP message is the first TWAMP message according to the source address and the destination address in the TWAMP message, is specifically configured to:

The source address, the destination address, the transmission port number of the first device and the reflection port number of the second device 700 in the TWAMP message are used as the quadruple to be identified;

When there is an identification information group matching the to-be-identified quadruple in the stored identification information groups, determine that the TWAMP message is the first TWAMP message;

The multiple identification information groups are pre-configured for the second device 700, and the identification information group matching the to-be-identified quadruple includes the source address, destination address, A quadruple of the transmit port number of the first device and the reflection port number of the second device 700 .

It should be noted that the division of units in the above embodiments of the present invention is schematic, and is only a logical function division. In actual implementation, there may be other division methods. For example, the first determination unit and the second determination unit may be It is the same determination unit or a different determination unit, or some features can be ignored or not implemented. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

Based on the above embodiments, the present application also provides a network monitoring system, which is applied in PTN. Referring to FIG. 8 , the system includes: a first device 801 , a second device 802 , and a third device 803 , wherein ,

The first device 801 is configured to send multiple first bidirectional active measurement protocol TWAMP messages to the second device 802 through the third device 803, where the first device 801 is an L3 PTN device, and the second device 802 is an L2 PTN device, the third device 803 is an L2/L3 bridge device; wherein, any first TWAMP message in the sent multiple first TWAMP messages includes an original time stamp, and the original time stamp is the Describe the time when the first device 801 sends the first TWAMP message, and the destination address in the first TWAMP message is the IP address of the base station or the reserved IP address on the same network segment as the base station;

The second device 802 is configured to, after receiving a message, determine that the message is the first TWAMP message sent by the first device 801 through the third device 803, and for the received first TWAMP message, Generate a second TWAMP message, and return the generated second TWAMP message to the first device 801 through the third device 803, where the second TWAMP message includes a sending timestamp and a receiving timestamp and the original timestamp in the first TWAMP packet, where the receiving timestamp is the time when the second device 802 received the first TWAMP packet, and the sending timestamp is the second device 802 The time when the second TWAMP packet is sent, the destination address of the second TWAMP packet is the same as the source address in the first TWAMP packet, and the source address of the second TWAMP packet is the same as the source address of the second TWAMP packet. The destination address of a TWAMP message is the same;

The third device 803 is configured to receive the first TWAMP packet sent by the first device 801, and forward the first TWAMP packet to the second device 802;

The third device 803 is further configured to receive the second TWAMP packet sent by the second device 802, and forward the second TWAMP packet to the first device 801;

The first device 801 is further configured to, after receiving a message, determine that the message is the second TWAMP message sent by the second device 802 through the third device 803; The number of the second TWAMP packets and the number of the first TWAMP packets sent, determine the packet loss rate of the network between the first device 801 and the second device 802; and according to the preset time period The original time stamp, the reception time stamp and the transmission time stamp included in the second TWAMP packet received in the TWAMP packet are used to determine the network delay between the first device 801 and the second device 802 .

Optionally, in the system, the first device 801 may be the L3 PTN device in FIG. 1 , the second device 802 may be the L2 PTN device in FIG. 1 , and the third device 803 may be the L2/L3 bridge device in FIG. 1 .

Optionally, the first device 801 may be the first device described in FIG. 5 and its corresponding embodiment section.

Optionally, the second device 802 may be the second device described in FIG. 7 and its corresponding embodiment section.

Optionally, the third device 803 may be the third device described in FIG. 6 and its corresponding embodiment section.

Based on the above embodiments, the present application further provides a first device, the first device may adopt the method provided in the embodiment corresponding to FIG. 2 , and may be the same device as the first device shown in FIG. 5 . The first device may be an L3 PTN device. The first device may be the L3 PTN device in FIG. 1 , and the first device may also be the first device 801 shown in FIG. 8 or the first device 500 shown in FIG. 5 . Referring to FIG. 9, the first device 900 includes: a transceiver 901, a processor 902, a bus 903 and a memory 904, wherein:

The transceiver 901, the processor 902 and the memory 904 are connected to each other through a bus 903; the bus 903 may be a peripheral component interconnect (PCI for short) bus or an extended industry standard architecture (EISA for short) bus Wait. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.

The transceiver 901 is configured to send the first TWAMP message to the second device through the third device, and receive messages sent by other devices, such as the second TWAMP message forwarded by the third device.

The processor 902 is configured to implement the network monitoring method shown in FIG. 2 according to the embodiment of the present invention, including:

Send a plurality of first TWAMP messages to a second device through a third device, the first device 900 is an L3 PTN device, the second device is an L2 PTN device, and the third device is an L2/L3 bridge device; Wherein, any one of the sent multiple first TWAMP messages includes an original time stamp, and the original time stamp is the time when the processor 902 sends the first TWAMP message, and the The destination address in the first TWAMP message is the IP address of the base station, or a reserved IP address on the same network segment as the base station;

After receiving a packet, determine that the packet is a second TWAMP packet sent by the second device through the third device, and the second TWAMP packet corresponds to a first TWAMP packet sent by the processor 902 TWAMP message, the second TWAMP message includes a sending time stamp, a receiving time stamp, and an original time stamp in the first TWAMP message, wherein the receiving time stamp is when the second device receives the first time stamp The time of the TWAMP message, the sending time stamp is the time when the second device sends the second TWAMP message, and the destination address of the second TWAMP message is the same as the source address in the first TWAMP message , the source address of the second TWAMP message is the same as the destination address of the first TWAMP message;

Determine the packet loss rate of the network between the first device 900 and the second device according to the number of the second TWAMP packets received and the number of the first TWAMP packets sent within the preset time period; and

Determine the network delay between the first device 900 and the second device according to the original timestamp, the receiving timestamp and the sending timestamp included in the second TWAMP packet received within the preset time period .

Optionally, the source address in any one of the first TWAMP messages in the sent multiple first TWAMP messages is any of the following:

The IP address of the first device 900, the IP address of the serving gateway S-GW interconnected with the first device 900, and the IP address of the same network segment as the S-GW.

Optionally, determining that the message is the second TWAMP message sent by the second device, including:

When determining that the message includes a TWAMP identifier, determining that the message is a TWAMP message;

According to the source address and the destination address in the TWAMP message, it is determined that the TWAMP message is the second TWAMP message.

Optionally, according to the source address and destination address in the TWAMP message, determine that the TWAMP message is the second TWAMP message, including:

Taking the destination address and source address in the TWAMP message as the two-tuple to be identified;

When there is an identification information group matching the to-be-identified binary group in the stored identification information groups, determine that the TWAMP message is the second TWAMP message;

The multiple identification information groups are set for the second device, and the identification information group matching the to-be-identified binary group is a binary including the source address and destination address of the first TWAMP message Group.

Optionally, any one of the first TWAMP messages in the sent multiple first TWAMP messages also includes the transmission port number of the first device 900 and the reflection port number of the second device;

The second TWAMP message further includes the transmission port number of the first device 900 and the reflection port number of the second device;

According to the source address and destination address in the TWAMP message, it is determined that the TWAMP message is the second TWAMP message, including:

Taking the destination address, source address, the transmit port number of the first device 900 and the reflection port number of the second device in the TWAMP message as the quadruple to be identified;

When there is an identification information group matching the to-be-identified quadruple in the stored identification information groups, determine that the TWAMP message is the second TWAMP message;

The plurality of identification information groups are set for the second device, and the identification information group matching the to-be-identified quadruple is an identification information group including a first TWAMP message corresponding to the second TWAMP message A source address and a destination address, and a quadruple of the transmit port number of the first device 900 and the reflection port number of the second device.

The first device 900 further includes a memory 904 for storing programs, and a plurality of identification information groups and the like set for the second device. Specifically, the program may include program code, the program code including computer operation instructions. The memory 904 may include random access memory (RAM), and may also include non-volatile memory (non-volatile memory), such as at least one disk storage. The processor 902 executes the application program stored in the memory 904 to implement the above network monitoring method.

Based on the above embodiments, the present application further provides a third device, which may adopt the method provided by the embodiment corresponding to FIG. 3 , and may be the same device as the third device shown in FIG. 6 . The third device may be an L2/L3 bridge device. The third device may be an L2/L3 bridge device in the network system shown in FIG. 1 , and the third device may also be the third device 803 in the network system shown in FIG. 8 or the third device shown in FIG. 6 600. Referring to FIG. 10, the third device 1000 includes: a transceiver 1001, a processor 1002, a bus 1003 and a memory 1004, wherein:

The transceiver 1001, the processor 1002 and the memory 1004 are connected to each other through a bus 1003; the bus 1003 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus Wait. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is used in FIG. 10, but it does not mean that there is only one bus or one type of bus.

The transceiver 1001 is configured to communicate with the first device and the second device connected to the third device 1000, such as receiving the first TWAMP message sent by the first device and forwarding it to the second device; receiving the first TWAMP message from the second device. Two TWAMP messages are forwarded to the first device and so on.

The processor 1002 is configured to implement the network monitoring method shown in FIG. 3 according to the embodiment of the present invention, including:

Receive a first TWAMP message sent by a first device, and forward the first TWAMP message to a second device, where the first device is an L3 PTN device, the second device is an L2 PTN device, and the The third device is an L2/L3 bridge device; wherein the first TWAMP packet includes an original timestamp, and the original timestamp is the time when the second device sent the first TWAMP packet, and the first The destination address in the TWAMP message is the IP address of the base station, or a reserved IP address on the same network segment as the base station;

The third device receives the second TWAMP packet sent by the second device, and forwards the second TWAMP packet to the first device, where the second TWAMP packet is sent corresponding to the first device A first TWAMP message, the second TWAMP message includes a sending time stamp, a receiving time stamp and an original time stamp in the first TWAMP message, wherein the receiving time stamp is the second device The time at which the first TWAMP message was received, the sending timestamp is the time when the second device sent the second TWAMP message, and the destination address of the second TWAMP message is the same as the first TWAMP message The source address of the second TWAMP packet is the same as the destination address of the first TWAMP packet.

Optionally, when the destination address in the first TWAMP message is the reserved IP address of the same network segment of the base station, forwarding the first TWAMP message to the second device includes:

Determine the MAC address corresponding to the destination address in the first TWAMP message according to the stored mapping relationship between the IP address and the MAC address; and

The first TWAMP packet is forwarded to the second device through the Layer 2 sub-interface corresponding to the determined MAC address.

The third device 1000 further includes a memory 1004 for storing the program, the mapping relationship between the IP address and the MAC address, and the like. Specifically, the program may include program code, the program code including computer operation instructions. The memory 1004 may include random access memory (RAM), and may also include non-volatile memory (non-volatile memory), such as at least one disk storage. The processor 1002 executes the application program stored in the memory 1004 to implement the above network monitoring method.

Based on the above embodiments, the present application further provides a second device, where the second device may be an L2PTN device. The second device may be the L2 PTN device in FIG. 1 , the second device may also be the second device 802 shown in FIG. 8 , and the second device may also be the second device 700 shown in FIG. 7 . Referring to FIG. 11 , the second device 1100 includes: a transceiver 1101, a processor 1102, a bus 1103, and a memory 1104, wherein:

The transceiver 1101, the processor 1102 and the memory 1104 are connected to each other through a bus 1103; the bus 1103 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus Wait. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is used in FIG. 11, but it does not mean that there is only one bus or one type of bus.

The transceiver 1101 is configured to communicate with a device connected to the second device 1100, such as receiving a first TWAMP packet forwarded by a third device, and returning a second TWAMP packet to the first device through the third device Wait.

The processor 1102 is configured to implement the network monitoring method shown in FIG. 4 according to the embodiment of the present invention, including:

After receiving a packet, it is determined that the packet is a first bidirectional active measurement protocol TWAMP packet sent by the first device through a third device, the first device is an L3 PTN device, and the second device 1100 is an L2 device PTN device, the third device is an L2/L3 bridge device; wherein, the first TWAMP packet includes an original timestamp, and the original timestamp is the time when the first device sends the first TWAMP packet time, the destination address in the first TWAMP message is the IP address of the base station, or the reserved IP address on the same network segment as the base station;

Return a second TWAMP packet to the first device through the third device, the second TWAMP packet corresponds to the first TWAMP packet sent by the first device, and the second TWAMP packet contains It includes a sending time stamp, a receiving time stamp, and the original time stamp in the first TWAMP message, where the receiving time stamp is the time when the processor 1102 receives the first TWAMP message, and the sending time The stamp is the time when the processor 1102 sends the second TWAMP packet, the destination address of the second TWAMP packet is the same as the source address in the first TWAMP packet, and the The source address is the same as the destination address of the first TWAMP message.

Optionally, the source address in the first TWAMP packet is any of the following:

The IP address of the first device, the IP address of the S-GW interconnected with the first device, and the IP address of the same network segment as the S-GW.

Optionally, determining that the message is the first TWAMP message sent by the first device, including:

When determining that the message includes a TWAMP identifier, determining that the message is a TWAMP message;

According to the source address and the destination address in the TWAMP message, it is determined that the TWAMP message is the first TWAMP message.

Optionally, according to the source address and destination address in the TWAMP message, it is determined that the TWAMP message is the first TWAMP message, including:

Taking the source address and destination address in the TWAMP message as the two-tuple to be identified;

When there is an identification information group matching the to-be-identified binary group in the stored identification information groups, determine that the TWAMP message is the first TWAMP message;

The plurality of identification information groups are pre-configured for the second device 1100, and the identification information group matching the to-be-identified binary group includes the source address and destination address of the first TWAMP message 2-tuple.

Optionally, the first TWAMP message further includes the transmission port number of the first device and the reflection port number of the second device 1100;

According to the source address and destination address in the TWAMP message, it is determined that the TWAMP message is the first TWAMP message, including:

Taking the source address, destination address, the transmission port number of the first device and the reflection port number of the second device 1100 in the TWAMP message as the quadruple to be identified;

When there is an identification information group matching the to-be-identified quadruple in the stored identification information groups, determine that the TWAMP message is the first TWAMP message;

The multiple identification information groups are pre-configured for the second device 1100, and the identification information group matching the to-be-identified quadruple includes the source address, destination address, A quadruple of the transmit port number of the first device and the reflection port number of the second device 1100.

The second device 1100 further includes a memory 1104 for storing programs, a plurality of identification information groups pre-configured for the second device, and the like. Specifically, the program may include program code, the program code including computer operation instructions. The memory 1104 may include random access memory (RAM), and may also include non-volatile memory (non-volatile memory), such as at least one disk storage. The processor 1102 executes the application program stored in the memory 1104 to implement the above network monitoring method.

According to the network monitoring method, device, and system provided by the embodiments of the present invention, the L3 PTN device in the PTN sends a plurality of first TWAMP messages to the L2 PTN device through the L2/L3 bridge device, and each first TWAMP message includes an indication The original timestamp of the time when the first device sent the first TWAMP message; the L2 PTN device sends each first TWAMP message to the L3 PTN device through the L2/L3 device after receiving each first TWAMP message A second TWAMP message is returned, where the second TWAMP message corresponds to the first TWAMP message. The second TWAMP message includes the original timestamp, the receiving timestamp and the sending timestamp in the first TWAMP message. Since the destination address in the first TWAMP packet is the IP address of the base station or a reserved IP address on the same network segment as the base station, the L3 PTN device can take the first TWAMP packet as the need to transmit to the base station The data packet is directly transmitted to the L2 PTN device, and further, the L2 PTN device can reply to the second TWAMP packet for the received first TWAMP packet, and finally, the L3 PTN device according to the preset time period The number of the second TWAMP message received and the number of the first TWAMP message sent, determine the packet loss rate of the network between the L3 PTN device and the L2PTN device; and according to the preset time period The difference between the receiving timestamp and the original timestamp included in the second received TWAMP packet, and the difference between the sending timestamp and the receiving timestamp, determine the difference between the first device and the second device. network delay. In this way, the L3 PTN device in the PTN can accurately determine the packet loss rate and delay of the network between the L3 PTN device and the L2 PTN device through the first TWAMP message and the second TWAMP message, thereby L3 PTN equipment improves the accuracy of network end-to-end performance monitoring.

Although the preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments may occur to those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of the present invention.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, provided that these modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and technical equivalents thereof, the present invention is also intended to include such modifications and variations.

Claims (25)

1. A method of network monitoring, comprising:

a first device in a Packet Transport Network (PTN) sends a plurality of first bidirectional active measurement protocol (TWAMP) messages to a second device through a third device, wherein the first device is a three-layer packet transport network (L3 PTN) device, the second device is a two-layer packet transport network (L2 PTN) device, and the third device is a two-layer/three-layer L2/L3 bridging device; any one of the sent first TWAMP messages includes an original timestamp, the original timestamp is the time when the first device sends the first TWAMP message, and a destination address in the first TWAMP message is an internet protocol IP address of a base station or a reserved IP address in the same network segment as the base station;

after the first device receives a packet, determining that the received packet is a second TWAMP packet sent by the second device through the third device, where the second TWAMP packet corresponds to a first TWAMP packet sent by the first device, and the second TWAMP packet includes a sending timestamp, a receiving timestamp, and an original timestamp in the first TWAMP packet, where the receiving timestamp is a time when the second device receives the first TWAMP packet, the sending timestamp is a time when the second device sends the second TWAMP packet, a destination address of the second TWAMP packet is the same as a source address in the first TWAMP packet, and a source address of the second TWAMP packet is the same as a destination address of the first TWAMP packet;

the first device determines the packet loss rate of a network between the first device and the second device according to the number of received second TWAMP messages and the number of sent first TWAMP messages within a preset time period; and are

And determining the network delay between the first device and the second device according to the original timestamp, the receiving timestamp and the sending timestamp included in the second TWAMP message received in the preset time period.

2. The method of claim 1, wherein a source address in any one of the sent plurality of first TWAMP messages is any one of:

the IP address of the first device, the IP address of a service gateway S-GW butted with the first device and the IP address of the same network segment with the S-GW.

3. The method according to claim 1 or 2, wherein the determining, by the first device, that the received packet is a second TWAMP packet sent by the second device, includes:

the first device determines that the received message comprises a TWAMP (two way radio Access protocol) identifier, and determines that the received message is a TWAMP message;

and the first equipment determines the TWAMP message as the second TWAMP message according to the source address and the destination address in the TWAMP message.

4. The method of claim 3, wherein the determining, by the first device, the TWAMP packet as the second TWAMP packet according to a source address and a destination address in the TWAMP packet comprises:

the first equipment takes the destination address and the source address in the TWAMP message as a binary group to be identified;

when an identification information group matched with the binary group to be identified exists in the stored identification information groups, determining the TWAMP message as the second TWAMP message;

the identification information groups are set for the second device, and the identification information group matched with the to-be-identified binary group is a binary group including a source address and a destination address of the first TWAMP message.

5. The method of claim 3, wherein any one of the sent plurality of first TWAMP messages further includes a transmission port number of the first device and a reflection port number of the second device;

the second TWAMP message further includes a transmission port number of the first device and a reflection port number of the second device;

the determining, by the first device, that the TWAMP packet is the second TWAMP packet according to the source address and the destination address in the TWAMP packet includes:

the first device takes a destination address, a source address, a transmitting port number of the first device and a reflecting port number of the second device in the TWAMP message as a quadruple to be identified;

when an identification information group matched with the quadruple to be identified exists in the stored identification information groups, determining the TWAMP message as the second TWAMP message;

the identification information groups are set for the second device, and the identification information group matched with the to-be-identified quadruple is a quadruple including a source address and a destination address of a first TWAMP message corresponding to the second TWAMP message, a transmission port number of the first device and a reflection port number of the second device.

6. A method of network monitoring, comprising:

a third device in a Packet Transport Network (PTN) receives a first bidirectional active measurement protocol (TWAMP) message sent by a first device and forwards the first TWAMP message to a second device, wherein the first device is a three-layer packet transport network (L3) PTN device, the second device is a two-layer packet transport network (L2) PTN device, and the third device is a two-layer/three-layer L2/L3 bridging device; the first TWAMP message comprises an original timestamp, the original timestamp is the time when the first equipment sends the first TWAMP message, and a destination address in the first TWAMP message is an Internet Protocol (IP) address of a base station or a reserved IP address of the same network segment as the base station;

the third device receives a second TWAMP packet sent by the second device, and forwards the second TWAMP packet to the first device, where the second TWAMP packet corresponds to a first TWAMP packet sent by the first device, and the second TWAMP packet includes a sending timestamp, a receiving timestamp, and an original timestamp in the first TWAMP packet, where the receiving timestamp is a time when the second device receives the first TWAMP packet, the sending timestamp is a time when the second device sends the second TWAMP packet, a destination address of the second TWAMP packet is the same as a source address in the first TWAMP packet, and a source address of the second TWAMP packet is the same as a destination address of the first TWAMP packet.

7. The method of claim 6, wherein when a destination address in the first TWAMP message is a reserved IP address of a same network segment of the base station, the third device forwards the first TWAMP message to the second device, comprising:

the third device determines an MAC address corresponding to a destination address in the first TWAMP message according to a mapping relation between a stored IP address and a Media Access Control (MAC) address; and are

And forwarding the first TWAMP message to the second device through a two-layer subinterface corresponding to the determined MAC address.

8. A method of network monitoring, comprising:

after receiving a message, a second device in the packet transport network PTN determines that the received message is a first bidirectional active measurement protocol TWAMP message sent by the first device through a third device, where the first device is a three-layer packet transport network L3PTN device, the second device is a two-layer packet transport network L2PTN device, and the third device is a two-layer/three-layer L2/L3 bridging device; the first TWAMP message comprises an original timestamp, the original timestamp is the time when the first equipment sends the first TWAMP message, and a destination address in the first TWAMP message is an Internet Protocol (IP) address of a base station or a reserved IP address of the same network segment as the base station;

the second device returns a second TWAMP message to the first device through the third device, where the second TWAMP message corresponds to the first TWAMP message sent by the first device, and the second TWAMP message includes a sending timestamp, a receiving timestamp, and an original timestamp in the first TWAMP message, where the receiving timestamp is a time when the second device receives the first TWAMP message, the sending timestamp is a time when the second device sends the second TWAMP message, a destination address of the second TWAMP message is the same as a source address in the first TWAMP message, and a source address of the second TWAMP message is the same as a destination address of the first TWAMP message.

9. The method of claim 8, wherein a source address in the first TWAMP message is any one of:

the IP address of the first device, the IP address of a service gateway S-GW butted with the first device and the IP address of the same network segment with the S-GW.

10. The method according to claim 8 or 9, wherein the determining, by the second device, that the received packet is the first TWAMP packet sent by the first device, includes:

when the second device determines that the received message includes the TWAMP identifier, determining that the received message is the TWAMP message;

and the second equipment determines the TWAMP message as the first TWAMP message according to the source address and the destination address in the TWAMP message.

11. The method of claim 10, wherein the determining, by the second device, the TWAMP packet as the first TWAMP packet according to a source address and a destination address in the TWAMP packet, comprises:

the second equipment takes a source address and a destination address in the TWAMP message as a binary group to be identified;

when an identification information group matched with the binary group to be identified exists in the stored identification information groups, determining the TWAMP message as the first TWAMP message;

the identification information groups are pre-configured to the second device, and the identification information group matched with the to-be-identified binary group is a binary group including a source address and a destination address of the first TWAMP packet.

12. The method of claim 10, wherein the first TWAMP message further includes a transmit port number of the first device, a reflected port number of the second device;

the second device determines, according to the source address and the destination address in the TWAMP message, that the TWAMP message is the first TWAMP message, including:

the second device takes a source address and a destination address in the TWAMP message, a transmitting port number of the first device and a reflecting port number of the second device as a quadruple to be identified;

when an identification information group matched with the quadruple to be identified exists in the stored identification information groups, determining the TWAMP message as the first TWAMP message;

the plurality of identification information groups are pre-configured to the second device, and the identification information group matched with the to-be-identified quadruple is a quadruple including a source address and a destination address of the first TWAMP packet, a transmission port number of the first device, and a reflection port number of the second device.

13. A first device, for use in a packet transport network, PTN, the first device comprising:

a sending unit, configured to send a plurality of first bidirectional active measurement protocol TWAMP messages to a second device through a third device, where the first device is a triple-layer packet transport network L3PTN device, the second device is a double-layer packet transport network L2PTN device, and the third device is a double-layer/triple-layer L2/L3 bridging device; any one of the sent first TWAMP messages comprises an original timestamp, the original timestamp is the time when the sending unit sends the first TWAMP message, and a destination address in the first TWAMP message is an internet protocol IP address of a base station or a reserved IP address in the same network segment with the base station;

a receiving unit, configured to receive a packet;

a determining unit, configured to determine, after the receiving unit receives a packet, that the received packet is a second TWAMP packet sent by the second device through the third device, where the second TWAMP packet corresponds to a first TWAMP packet sent by the first device, and the second TWAMP packet includes a sending timestamp, a receiving timestamp, and an original timestamp in the first TWAMP packet, where the receiving timestamp is a time when the second device receives the first TWAMP packet, the sending timestamp is a time when the second device sends the second TWAMP packet, a destination address of the second TWAMP packet is the same as a source address in the first TWAMP packet, and a source address of the second TWAMP packet is the same as a destination address of the first TWAMP packet;

the processing unit is configured to determine a packet loss rate of a network between the first device and the second device according to the number of received second TWAMP messages and the number of sent first TWAMP messages in a preset time period; and are

And determining the network delay between the first device and the second device according to the original timestamp, the receiving timestamp and the sending timestamp included in the second TWAMP message received in the preset time period.

14. The first device of claim 13, wherein a source address in any one of the sent plurality of first TWAMP messages is any one of:

the IP address of the first device, the IP address of a service gateway S-GW butted with the first device and the IP address of the same network segment with the S-GW.

15. The first device according to claim 13 or 14, wherein the determining unit is specifically configured to:

when the received message is determined to include the TWAMP mark, determining that the received message is the TWAMP message;

and determining the TWAMP message as the second TWAMP message according to the source address and the destination address in the TWAMP message.

16. The first device of claim 15, wherein, when determining that the TWAMP packet is the second TWAMP packet according to a source address and a destination address in the TWAMP packet, the determining unit is specifically configured to:

taking the destination address and the source address in the TWAMP message as a binary group to be identified;

when an identification information group matched with the binary group to be identified exists in the stored identification information groups, determining the TWAMP message as the second TWAMP message;

the identification information groups are set for the second device, and the identification information group matched with the to-be-identified binary group is a binary group including a source address and a destination address of the first TWAMP message.

17. The first device of claim 15, wherein any one of the transmitted plurality of first TWAMP messages further comprises a transmit port number of the first device, a reflected port number of the second device;

the second TWAMP message further includes a transmission port number of the first device and a reflection port number of the second device;

the determining unit, when determining that the TWAMP packet is the second TWAMP packet according to the source address and the destination address in the TWAMP packet, is specifically configured to:

taking a destination address, a source address, a transmitting port number of the first device and a reflecting port number of the second device in the TWAMP message as a quadruple to be identified;

when an identification information group matched with the quadruple to be identified exists in the stored identification information groups, determining the TWAMP message as the second TWAMP message;

the identification information groups are set for the second device, and the identification information group matched with the to-be-identified quadruple is a quadruple including a source address and a destination address of a first TWAMP message corresponding to the second TWAMP message, a transmission port number of the first device and a reflection port number of the second device.

18. A third device, for use in a packet transport network, PTN, the third device comprising:

a receiving unit, configured to receive a first bidirectional active measurement protocol TWAMP packet sent by a first device, where the first device is a three-layer packet transport network L3PTN device, and the third device is a two-layer/three-layer L2/L3 bridging device; the first TWAMP message comprises an original timestamp, the original timestamp is the time when the first equipment sends the first TWAMP message, and a destination address in the first TWAMP message is an Internet Protocol (IP) address of a base station or a reserved IP address of the same network segment as the base station;

a sending unit, configured to forward the first TWAMP packet to a second device, where the second device is a layer two packet transport network L2PTN device;

the receiving unit is further configured to receive a second TWAMP packet sent by the second device, where the second TWAMP packet corresponds to a first TWAMP packet sent by the first device, and the second TWAMP packet includes a sending timestamp, a receiving timestamp, and an original timestamp in the first TWAMP packet, where the receiving timestamp is a time when the second device receives the first TWAMP packet, the sending timestamp is a time when the second device sends the second TWAMP packet, a destination address of the second TWAMP packet is the same as a source address in the first TWAMP packet, and a source address of the second TWAMP packet is the same as a destination address of the first TWAMP packet;

the sending unit is further configured to forward the second TWAMP packet to the first device.

19. The third device of claim 18, wherein when the destination address in the first TWAMP message is a reserved IP address of the same segment of the base station, the third device further comprises:

a determining unit, configured to determine, according to a mapping relationship between a stored IP address and a media access control MAC address, a MAC address corresponding to a destination address in the first TWAMP message;

the sending unit is specifically configured to forward the first TWAMP packet to the second device through a two-layer subinterface corresponding to the determined MAC address.

20. Second device, for use in a packet transport network, PTN, the second device comprising:

a receiving unit, configured to receive a packet;

a determining unit, configured to determine, after the receiving unit receives a packet, that the received packet is a first bidirectional active measurement protocol TWAMP packet sent by a first device through a third device, where the first device is a three-layer packet transport network L3PTN device, the second device is a two-layer packet transport network L2PTN device, and the third device is a two-layer/three-layer L2/L3 bridging device; the first TWAMP message comprises an original timestamp, the original timestamp is the time when the first equipment sends the first TWAMP message, and a destination address in the first TWAMP message is an Internet Protocol (IP) address of a base station or a reserved IP address of the same network segment as the base station;

a sending unit, configured to return a second TWAMP packet to the first device through the third device, where the second TWAMP packet corresponds to the first TWAMP packet sent by the first device, and the second TWAMP packet includes a sending timestamp, a receiving timestamp, and an original timestamp in the first TWAMP packet, where the receiving timestamp is a time when the receiving unit receives the first TWAMP packet, the sending timestamp is a time when the sending unit sends the second TWAMP packet, a destination address of the second TWAMP packet is the same as a source address in the first TWAMP packet, and a source address of the second TWAMP packet is the same as a destination address of the first TWAMP packet.

21. The second device of claim 20, wherein a source address in the first TWAMP message is any one of:

the IP address of the first device, the IP address of a service gateway S-GW butted with the first device and the IP address of the same network segment with the S-GW.

22. The second device according to claim 20 or 21, wherein the determining unit is specifically configured to:

when the received message is determined to include the TWAMP mark, determining that the received message is the TWAMP message;

and determining the TWAMP message as the first TWAMP message according to the source address and the destination address in the TWAMP message.

23. The second device of claim 22, wherein, when determining that the TWAMP packet is the first TWAMP packet according to a source address and a destination address in the TWAMP packet, the determining unit is specifically configured to:

taking a source address and a destination address in the TWAMP message as a binary group to be identified;

when an identification information group matched with the binary group to be identified exists in the stored identification information groups, determining the TWAMP message as the first TWAMP message;

the identification information groups are pre-configured to the second device, and the identification information group matched with the to-be-identified binary group is a binary group including a source address and a destination address of the first TWAMP packet.

24. The second device of claim 22, wherein the first TWAMP message further includes a transmit port number of the first device, a reflected port number of the second device;

the determining unit, when the second device determines that the TWAMP packet is the first TWAMP packet according to the source address and the destination address in the TWAMP packet, is specifically configured to:

taking a source address and a destination address in the TWAMP message, a transmitting port number of the first device and a reflecting port number of the second device as a quadruple to be identified;

when an identification information group matched with the quadruple to be identified exists in the stored identification information groups, determining the TWAMP message as the first TWAMP message;

the plurality of identification information groups are pre-configured to the second device, and the identification information group matched with the to-be-identified quadruple is a quadruple including a source address and a destination address of the first TWAMP packet, a transmission port number of the first device, and a reflection port number of the second device.

25. A network monitoring system, applied in a packet transport network, PTN, the system comprising:

a first device, configured to send a plurality of first bidirectional active measurement protocol TWAMP messages to a second device through a third device, where the first device is a three-layer packet transport network L3PTN device, the second device is a two-layer packet transport network L2PTN device, and the third device is a two-layer/three-layer L2/L3 bridging device; any one of the sent first TWAMP messages includes an original timestamp, where the original timestamp is time when the first device sends the first TWAMP message, and a destination address in the first TWAMP message is an internet protocol IP address of a base station or a reserved IP address in the same network segment as the base station;

the second device is configured to, after receiving a packet, determine that the packet is a first TWAMP packet sent by the first device through the third device, generate a second TWAMP packet for the received first TWAMP packet, and return the generated second TWAMP packet to the first device through the third device, where the second TWAMP packet includes a sending timestamp, a receiving timestamp, and an original timestamp in the first TWAMP packet, where the receiving timestamp is a time when the second device receives the first TWAMP packet, the sending timestamp is a time when the second device sends the second TWAMP packet, a destination address of the second TWAMP packet is the same as a source address in the first TWAMP packet, and a source address of the second TWAMP packet is the same as a destination address of the first TWAMP packet;

the third device is configured to receive the first TWAMP packet sent by the first device, and forward the first TWAMP packet to the second device;

the third device is further configured to receive a second TWAMP packet sent by the second device, and forward the second TWAMP packet to the first device;

the first device is further configured to determine, after receiving a packet, that the packet is a second TWAMP packet sent by the second device through the third device; determining the packet loss rate of a network between the first device and the second device according to the number of received second TWAMP messages and the number of sent first TWAMP messages within a preset time period; and determining the network delay between the first device and the second device according to the original timestamp, the receiving timestamp and the sending timestamp included in the second TWAMP message received in the preset time period.

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