CN116112402A - Bandwidth monitoring method, system, PTP equipment and bandwidth computing equipment - Google Patents

Bandwidth monitoring method, system, PTP equipment and bandwidth computing equipment Download PDF

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Publication number
CN116112402A
CN116112402A CN202310009047.3A CN202310009047A CN116112402A CN 116112402 A CN116112402 A CN 116112402A CN 202310009047 A CN202310009047 A CN 202310009047A CN 116112402 A CN116112402 A CN 116112402A
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ptp
time stamp
message
bandwidth
statistical information
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贺彦军
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Beijing Shengxin Network Technology Co ltd
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Beijing Shengxin Network Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0876—Network utilisation, e.g. volume of load or congestion level
    • H04L43/0894—Packet rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
    • H04L43/106—Active monitoring, e.g. heartbeat, ping or trace-route using time related information in packets, e.g. by adding timestamps
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/50—Testing arrangements

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Abstract

The embodiment of the disclosure discloses a bandwidth monitoring method, a system, PTP equipment and bandwidth computing equipment, wherein the method comprises the following steps: PTP equipment receives a PTP message, samples a time stamp and stream statistical information, and stores the time stamp and the stream statistical information in the PTP message; the PTP device transmits the time stamp and the stream statistics to the bandwidth calculating device to cause the bandwidth calculating device to calculate the bandwidth from the time stamp and the stream statistics. The bandwidth monitoring method, the system, the PTP equipment and the bandwidth computing equipment disclosed by the embodiment of the disclosure can improve the computing accuracy of the bandwidth, save timing resources and save bandwidth resources.

Description

Bandwidth monitoring method, system, PTP equipment and bandwidth computing equipment
Technical Field
The present disclosure relates to, but not limited to, the field of communications, and in particular, to a bandwidth monitoring method, system, PTP device, and bandwidth computing device.
Background
The bandwidth monitoring in the network mostly adopts a method of timing sampling, and the timing sampling can comprise software sampling, namely, software periodically reading flow statistics count in the underlying hardware.
The principle of software sampling flow statistics is as follows: the hardware chip internally counts the received messages and locally maintains a statistics counter. And the software respectively samples and reads cnt1, cnt2 and cnt3 at the time of T1, T2 and T3, and the bandwidth is calculated by reading out the difference value through twice sampling.
Bandwidth at time T2: (cnt 2-cnt 1)/(T2-T1) = (cnt 2-cnt 1)/[ delta ] T1;
bandwidth at time T3: (cnt 3-cnt 2)/(T3-T2) = (cnt 3-cnt 2)/[ delta ] T2.
Because the software timing is inaccurate, the software starts sampling reading at a fixed time interval delta t, but because the software timing is not accurate in hardware, and the reading and writing can be slightly different by the order of software running commands, the time intervals at the bottom layer of the hardware chip are delta t1 and delta t2 finally. The software calculates the bandwidth as follows:
bandwidth at sample 2: (cnt 2-cnt 1)/[ delta ] t;
bandwidth at sample 3: (cnt 3-cnt 2)/. DELTA.t.
The timing misalignment causes a misalignment of the intervals, and the bandwidth calculated by the software is not as accurate as the actual bandwidth.
Disclosure of Invention
In a first aspect, an embodiment of the present disclosure provides a bandwidth monitoring method, including:
PTP equipment receives a PTP message, samples a time stamp and stream statistical information, and stores the time stamp and the stream statistical information in the PTP message;
the PTP device sends the time stamp and the stream statistical information to a bandwidth computing device so that the bandwidth computing device calculates the bandwidth according to the time stamp and the stream statistical information.
In a second aspect, an embodiment of the present disclosure provides a bandwidth monitoring method, including:
The bandwidth computing equipment receives a PTP message sent by PTP equipment, wherein the PTP message carries a time stamp and stream statistical information of corresponding time;
the bandwidth calculation device calculates a bandwidth from the time stamp and the flow statistics.
In a third aspect, embodiments of the present disclosure further provide a PTP device, including a memory for storing execution instructions and a processor; the processor invokes the execution instruction to execute the bandwidth monitoring method according to any embodiment of the first aspect.
In a fourth aspect, embodiments of the present disclosure further provide a bandwidth computing device, including a memory for storing execution instructions and a processor; the processor invokes the execution instructions for performing the bandwidth monitoring method according to any of the embodiments of the second aspect.
In a fifth aspect, embodiments of the present disclosure further provide a bandwidth monitoring system, including the PTP device described in any embodiment and the bandwidth calculating device described in any embodiment.
Compared with the prior art, the bandwidth monitoring method, the system, the PTP equipment and the bandwidth computing equipment provided by at least one embodiment of the present disclosure have the following beneficial effects: the PTP message is adopted to carry time and stream statistical information required by calculating the real-time bandwidth, the sampling time interval is accurate, and therefore the calculated bandwidth is also accurate. And the time stamp and stream statistical information carried by the PTP message are utilized to calculate the bandwidth, software timing training is not needed to read sampling information, and the CPU is not needed to be interrupted at regular time, so that timing resources are saved, and bandwidth resources are saved.
Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the disclosure. Other advantages of the present disclosure may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The accompanying drawings are included to provide an understanding of the technical aspects of the present disclosure, and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present disclosure and together with the embodiments of the disclosure, not to limit the technical aspects of the present disclosure.
Fig. 1 is a flowchart of a bandwidth monitoring method according to an exemplary embodiment of the present disclosure;
fig. 2 is a schematic diagram of a PTP Sync message upload CPU provided in an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a Sync report Wen Chuantong chip, board or frame provided in an embodiment of the disclosure;
FIG. 4 is a schematic diagram of a Sync message from one device to another device provided in an embodiment of the present disclosure;
fig. 5 is a flowchart of a bandwidth monitoring method provided by another exemplary embodiment of the present disclosure;
FIG. 6 is a block diagram of a PTP device provided by an embodiment of the present disclosure;
fig. 7 is a block diagram of a bandwidth computing device provided by an embodiment of the present disclosure.
Detailed Description
The present disclosure describes several embodiments, but the description is illustrative and not limiting, and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described in the present disclosure. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or in place of any other feature or element of any other embodiment unless specifically limited.
The present disclosure includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements of the present disclosure that have been disclosed may also be combined with any conventional features or elements to form a unique inventive arrangement as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive arrangements to form another unique inventive arrangement as defined in the claims. Thus, it should be understood that any of the features shown and/or discussed in this disclosure may be implemented alone or in any suitable combination. Accordingly, the embodiments are not to be restricted except in light of the attached claims and their equivalents. Further, various modifications and changes may be made within the scope of the appended claims.
Furthermore, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other sequences of steps are possible as will be appreciated by those of ordinary skill in the art. Accordingly, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Furthermore, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present disclosure.
Fig. 1 is a flowchart of a bandwidth monitoring method according to an exemplary embodiment of the present disclosure, where, as shown in fig. 1, the bandwidth monitoring method may include: s101 and S102.
S101: the PTP device receives the PTP message, samples the time stamp and the stream statistics information, and stores the time stamp and the stream statistics information in the PTP message.
The embodiment of the disclosure provides a monitoring method for accurate bandwidth real-time association in a PTP (precision time protocol) packet synchronization network, which utilizes periodic PTP packets to sample time stamp and stream statistics information, wherein the time stamp and the stream statistics are at the same time, and the PTP packets are used for carrying time and stream statistics information required by calculating the real-time bandwidth.
PTP (Precision Time Protocol) is a protocol defined in IEEE 1588 protocol for time synchronization by means of messages. Currently there are three versions: version V1 in 2002, version V2 in 2008 and version V3 in 2019. The V2 and V3 versions are currently mainly used. In PTP 11 messages are defined: sync, delay_Req, pdelay_Req, pdelay_Resp, follow_Up, delay_Resp, pdelay_Resp_Follow_ Up, announce, signaling, management. The messages Sync, delay_req, pdelay_req, pdelay_resp are event messages, and carry a timestamp for time synchronization.
In an example embodiment of the present disclosure, the PTP message may be a PTP event message, since the PTP event message is sampled and carries a timestamp when entering the port or when exiting the port, and the PTP event message timestamp is sampled and recorded in the message when the message is received from the port or sent from the port. The PTP equipment samples stream statistics when a PTP event message enters the port or exits the port, and the sampling time stamp and stream statistics can be realized to be at the same time by simultaneously sampling stream statistics information when the time stamp is sampled. And storing the sampled stream statistics in a PTP event message, wherein the PTP event message is used for carrying time and stream statistics information required by calculating the real-time bandwidth.
In an example embodiment of the present disclosure, storing the flow statistics in PTP messages may include: the flow statistics are stored in a reserved field of the PTP message.
The PTP message may be provided with reserved fields, which are reserved but not used in the PTP message, or reserved but not defined for specific use. According to the embodiment of the disclosure, the sampled stream statistics information can be stored in the reserved field of the PTP message, and the stream statistics information required by calculating the real-time bandwidth is carried by the reserved field of the PTP message, so that the bandwidth real-time monitoring is realized.
The PTP message has a 34 byte common header, table 1 is a V2 version of the PTP message, and as shown in table 1, a reserved field of length 4 bytes is reserved between the V2 version of the correctionField field and the sourcePortIdentity field of the PTP message. There are multiple reserved fields in the V2 version common header, and the disclosed embodiment stores the sampled flow statistics in the reserved field, here 4 bytes long.
TABLE 1
Figure BDA0004037183180000051
Table 2 shows the general header of version V3 of the PTP message, and as shown in Table 2, the message type specific field of length 4 bytes is located between the field of the correctionField version V3 and the source Port identity field of the PTP message. The messagetypespecification field itself does not define a specific usage in the V3 version standard of PTP messages, and different PTP device manufacturers may use this field for different purposes when implementing, but this field has only a local meaning, i.e. meaning within a single PTP device, and still remains between PTP devices.
TABLE 2
Figure BDA0004037183180000061
The general header of the PTP messages shown in table 1 and table 2 is a standard format defined by the IEEE 1588 protocol V2 and V3 versions, and this embodiment is not limited and described herein in detail.
In an example, storing the flow statistics in the reserved field of the PTP message may include:
the flow statistics are stored in the reserved field in the V2 version of the PTP message or the messageTypeSpecific field of the V3 version.
According to the embodiment of the disclosure, the sampled stream statistics information can be stored in the reserved field with the length of 4 bytes of the version V2 of the PTP message, or the sampled stream statistics information can be stored in the message type specific field of the version V3 of the PTP message, and the reserved field or the message type specific field of the PTP message carries the stream statistics information required by calculating the real-time bandwidth, so that the bandwidth real-time monitoring is realized.
There are multiple reserved fields in the V2 version common header, and the disclosed embodiment stores the sampled flow statistics in reserved fields of length 4 bytes between the V2 version correction field and sourcePortIdentity fields of the PTP message.
In an example embodiment of the present disclosure, storing the flow statistics in PTP messages may include: the stream statistics are stored at the end of the PTP message.
Additional fields can be added at the end of the PTP message, and the sampled stream statistics can be placed at the end of the PTP message. For example, when the reserved field of the PTP packet is occupied, the sampled flow statistics may be placed at the end of the PTP packet.
In an example embodiment of the present disclosure, storing the timestamp in the PTP message may include: the timestamp is stored in the timestamp field of the PTP message.
The sampled time stamp may be placed in an inherent field of the PTP message for storing time, e.g., the time stamp may be placed in a time stamp field of the PTP event message.
In an example embodiment of the present disclosure, storing the timestamp in the PTP message may include: the timestamp is stored at the end of the PTP message.
Additional fields may be added at the end of the PTP message, and the sampled time stamp may be placed at the end of the PTP message. For example, when the timestamp field of the PTP event message is occupied, the sampled timestamp may be placed at the end of the PTP message. Alternatively, for PTP ordinary messages having no inherent field for storing time, the sampled time stamp may be placed at the end of the PTP message.
In one example, a PTP event message may place a sampled timestamp in the send direction in the field inherent to the stored timestamp and at the end of the message when sent to the CPU in the receive direction. There is only one timestamp field in the PTP event message, and if the timestamp field is already occupied in the transmit direction, the timestamp is placed at the end of the PTP message in the receive direction.
S102: the PTP device transmits the time stamp and the stream statistics to the bandwidth calculating device to cause the bandwidth calculating device to calculate the bandwidth from the time stamp and the stream statistics.
The PTP message carries time and flow statistical information required by calculating real-time bandwidth, and the bandwidth condition of the PTP message when passing through the equipment node can be accurately calculated by using the flow statistical information and the time information. With PTP messages, the time interval of sampling is precise, and thus the calculated bandwidth is also precise. The bandwidth is calculated by using the time stamp and the stream statistics information carried by the PTP message without adopting a software or hardware timer to time sample the stream statistics information, the sampling information is read without software timing training, the CPU is not required to be interrupted at fixed time, the timing resource is saved, and the bandwidth resource is saved.
The PTP device transmits the time stamp and the stream statistics to a bandwidth calculation device, which calculates a bandwidth from the time stamp and the stream statistics. The bandwidth calculating device may calculate the bandwidth according to the time stamp and the stream statistics information by using an existing scheme, for example, the bandwidth w= (cnt 2-cnt 1)/(T2-T1), where T1 and T2 are time stamps carried by two adjacent messages respectively, and cnt1 and cnt2 are stream statistics information carried by two adjacent messages respectively.
In an example embodiment of the present disclosure, the PTP device sends the timestamp and stream statistics to the bandwidth computing device. May include: and uploading the PTP message carrying the time stamp and the stream statistics information to bandwidth computing equipment.
The PTP message carries time and stream statistical information required by calculating real-time bandwidth, and the message is directly reported to bandwidth calculating equipment, so that the bandwidth condition of the moment when the PTP message flows through each equipment node can be calculated.
In an example embodiment of the present disclosure, the PTP device sends the timestamp and stream statistics to the bandwidth computing device. May include: and extracting the time stamp and the stream statistical information stored in the PTP message and sending the extracted time stamp and stream statistical information to the bandwidth computing equipment.
For the PTP message that is not sent to the bandwidth computing device, the timestamp and the flow statistics information stored in the PTP message may be extracted, and then the extracted timestamp and flow statistics information may be sent to the bandwidth computing device.
The manner of sending the extracted time stamp and stream statistics information to the bandwidth computing device can be customized, for example, the bandwidth computing device or the PTP device (such as network management device) has special interactive messages, various information can be interacted, a special message can be defined, and the extracted time stamp and stream statistics information are put in the special message and sent to the bandwidth computing device.
According to the bandwidth monitoring method provided by the embodiment of the disclosure, PTP messages are adopted to carry time and flow statistical information required by calculating real-time bandwidth, sampling time intervals are accurate, and therefore calculated bandwidth is accurate. And the time stamp and stream statistical information carried by the PTP message are utilized to calculate the bandwidth, software timing training is not needed to read sampling information, and the CPU is not needed to be interrupted at regular time, so that timing resources are saved, and bandwidth resources are saved. In addition, the embodiment of the disclosure utilizes the existing field of the PTP message or is placed at the end of the message, so that the format of the PTP message does not need to be greatly changed, and the hardware implementation is facilitated.
In an example embodiment of the present disclosure, the time stamps and stream statistics of PTP device samples may include: ingress time stamp and ingress flow statistics sampled at the time of PTP message ingress port.
The inlet time stamp and inlet flow statistical information of the PTP message inlet port can be sampled, and the flow condition of the PTP message at the inlet moment can be calculated.
The PTP event message time stamp is sampled and recorded in the message when the message is received from the port or transmitted from the port, and the stream statistical information is sampled at the same time when the time stamp is sampled, so that the time stamp of sampling and the stream statistical information can be realized to be at the same time.
Taking a PTP Sync event message as an example, other PTP event messages can be used as messages of the flow statistics information, which is not described here again.
When a PTP Sync event message is received by a Slave port, a time stamp of the moment when the Sync event message enters the port is sampled, and when the Sync event message enters the port, PTP equipment synchronously samples stream statistics.
According to the protocol, the Sync message samples a time stamp (generated by writing in) at the receiving moment of the Slave node, the patent newly adds resampling stream statistics, and the stream statistics are written into the message after sampling. The time stamp of the sample may be placed in a special time stamp field of the Sync message and the flow statistics of the sample stored in a reserved field of the Sync message.
The PTP event message can put the sampled time stamp in the inherent field in the sending direction, but generally put at the end of the message when sending the bandwidth computing device (such as CPU) in the receiving direction, because only one time stamp field in the PTP event message is already occupied in the sending direction, then put at the end of the message in the receiving direction and sent to the CPU with the message. The reserved field of the same PTP event message is only one, and after the reserved field is occupied, the end of the message is put in the stream statistics of the receiving direction sampling.
In an example embodiment of the present disclosure, the PTP device samples and stores the time stamp and the flow statistics in PTP messages, may include: the PTP device samples the ingress time stamp and ingress flow statistics, stores the ingress time stamp in a time stamp field or end of message of the PTP message, and stores the ingress flow statistics in a reserved field of the PTP message.
Accordingly, the PTP device sending the timestamp and stream statistics to the bandwidth computing device may include: the PTP device sends a PTP message carrying the entry time stamp and the entry flow statistical information to the bandwidth computing device.
Fig. 2 is a schematic diagram of a PTP Sync message upload CPU provided by an embodiment of the present disclosure, as shown in fig. 2, where an application scenario is a Sync message upload CPU, according to the PTP protocol, for a Slave node, the Sync message needs to be uploaded, and carries an entry timestamp (the PTP protocol is called as TS 2), and the carried entry timestamp is usually placed at the end of the message. Sampling the inlet stream statistical information while the Sync message carries a timestamp T1, and storing the sampled inlet stream statistical information in a reserved field of 4 bytes of a V2 version or a message type specific field of a V3 version of the PTP message.
When the first Sync message is sent, the time stamp T1 and the stream statistics information cnt1 are carried, and when the second Sync message is sent, the time stamp T2 and the stream statistics information cnt2 are carried, so that the accurate bandwidth can be calculated: w= (cnt 2-cnt 1)/(T2-T1).
Each Sync message uploading CPU can calculate the bandwidth according to the carried time stamp and the flow statistical information, and can accurately know the flow condition of each PTP message at the moment of entry.
In an example embodiment of the present disclosure, the time stamps and stream statistics of PTP device samples may include: the ingress time stamp and ingress flow statistics sampled at the time of the PTP message ingress port, and the egress time stamp and egress flow statistics sampled at the time of the PTP message egress port.
The ingress time stamp, ingress flow statistics, egress time stamp and egress flow statistics of the PTP packet egress port may be sampled, and the exact bandwidth between the two PTP packets is calculated.
In an example embodiment of the present disclosure, the PTP device samples and stores the time stamp and the flow statistics in PTP messages, may include: the PTP equipment samples the entry time stamp and the entry stream statistical information, stores the entry time stamp in a time stamp field or the end of a message of the PTP message, and stores the entry stream statistical information in a reserved field of the PTP message; and the PTP equipment samples the exit time stamp and the exit flow statistical information, extracts the entry time stamp and the entry flow statistical information stored in the PTP message, stores the exit flow statistical information in a reserved field of the PTP message, and stores the exit time stamp in a time stamp field or the end of the PTP message.
Accordingly, the PTP device sending the timestamp and stream statistics to the bandwidth computing device may include: and packaging the entry timestamp, the entry stream statistical information, the exit timestamp and the exit stream statistical information to be sent to the bandwidth computing device.
Fig. 3 is a schematic diagram of a Sync message Wen Chuantong chip, board or frame provided in an embodiment of the present disclosure, where, as shown in fig. 3, an application scenario is that a PTP Sync message passes through the chip, board or frame, and belongs to a PTP TC (transparent clock) node in a PTP protocol. When in ingress, the Sync message samples the ingress time stamp and ingress stream statistics information, the ingress time stamp is used as a descriptor to be transmitted along with the message in a chip, or put at the tail of the message, or the time stamp is stored in a chip, a single board or a frame, and the ingress stream statistics information is put in a reserved field.
The Sync message is subjected to various exchange processes and finally reaches the outlet of the chip (single board or machine frame), and when the message reaches the outlet, the outlet time stamp and the outlet flow statistical information are sampled. Extracting the time stamp and stream statistical information of the Sync message at the inlet sampling, placing the stream statistical information of the outlet sampling into a reserved field, and deleting the inlet time stamp at the end of the loading message at the inlet of the Sync message, so that the message keeps the original length. Since the reserved field has only a local meaning, at the next PTP device, the reserved field can be covered by the next PTP device without any effect. The sampled ingress time stamp and ingress flow statistics, egress time stamp and egress flow statistics are fed to the CPU as a whole.
When the second Sync message passes through, the precise bandwidth between the first message and the second message can be calculated: exact ingress bandwidth w1= (cnt 2in-cnt1 in)/(T2 in-T1 in); exact egress bandwidth w2= (cnt 2out-cnt1 out)/(T2 out-T1 out). T1in, cnt1in, T1out and cnt1out are respectively the entry timestamp, the entry stream statistics, the exit timestamp and the exit stream statistics of the first Sync message, and T2in, cnt2in, T2out and cnt2out are respectively the entry timestamp, the entry stream statistics, the exit timestamp and the exit stream statistics of the second Sync message.
As no message is sent to CPU, the result of PTP Sync message sampling when passing through the chip, single board or frame can be packaged and sent or the customized and sent mode can be used. For example, the bandwidth computing device or the chip (single board or machine frame) has special interactive messages, which can interact various information, a special message can be defined, and the extracted time stamp and stream statistics information are put in the special message and sent to the bandwidth computing device.
In an example embodiment of the present disclosure, the time stamps and stream statistics of PTP device samples may include: the output time stamp and the output flow statistical information are sampled at the moment of the PTP message output port.
The outlet time stamp and the outlet flow statistical information of the PTP message outlet port can be sampled, and the flow condition of the PTP message at the outlet moment can be calculated.
In an example embodiment of the present disclosure, the PTP device samples and stores the time stamp and the flow statistics in PTP messages, may include: the PTP equipment samples the outlet time stamp and the outlet stream statistical information, stores the outlet time stamp in a time stamp field or the end of the PTP message, stores the outlet stream statistical information in a reserved field of the PTP message, and sends the PTP message to the downstream PTP equipment.
Accordingly, the PTP device sending the timestamp and stream statistics to the bandwidth computing device may include: and extracting the exit timestamp and the exit stream statistical information stored in the PTP message and sending the extracted exit timestamp and the exit stream statistical information to the bandwidth computing equipment.
Fig. 4 is a schematic diagram of a Sync message from one device to another device, where, as shown in fig. 4, an application scenario is that a PTP Sync message is sent from a previous device (PTP device 1 in fig. 4), and a downstream device (PTP device 2 in fig. 4) receives the Sync message, according to an embodiment of the disclosure. For example, the upstream device is a PTP Master and the downstream device is a PTP Slave. According to the PTP protocol, when the upstream device PTP Master device sends out the Sync message, the exit timestamp is recorded, meanwhile, the exit stream statistical information is sampled to a reserved field in the Sync message for the downstream device to use, and before the downstream device sends the Sync message, the exit timestamp and the exit stream statistical information stored in the Sync message are extracted and sent to the CPU.
At the upstream ptpmaster device, when the second Sync message is sent, the exit bandwidth w= (cnt 2out-cnt1 out)/(T2 out-T1 out) of the device may be calculated.
In an example embodiment of the present disclosure, a PTP device receives a PTP message, samples a time stamp and stream statistics, and stores the time stamp and stream statistics in the PTP message, may include: PTP equipment receives a PTP message sent by upstream PTP equipment, and extracts an outlet timestamp and outlet flow statistical information of the PTP message from the PTP message; the PTP device samples the entry timestamp of the current device and the entry stream statistical information of the current device, stores the entry timestamp of the current device at the end of the PTP message, and stores the entry stream statistical information of the current device in a reserved field of the PTP message.
Accordingly, the PTP device sending the timestamp and stream statistics to the bandwidth computing device may include: the upstream PTP device's exit timestamp and exit flow statistics, and the current device's entry timestamp and entry flow statistics are packetized and sent to the bandwidth computing device.
As shown in fig. 4, the application scenario is that a PTP Sync message is sent from the last device (PTP device 1 in fig. 4) and received by the downstream device (PTP device 2 in fig. 4). For example, the upstream device is a PTP Master and the downstream device is a PTP Slave. According to the PTP protocol, when the upstream device PTP Master device sends out the Sync message, the outlet timestamp is recorded, and at the same time, the outlet flow statistics information is sampled to the reserved field in the Sync message for use by the downstream device. When the downstream Slave equipment receives the Sync message sampling entry time stamp and entry stream statistics, putting the sampled entry time stamp and entry stream statistics at the end of the message, and uploading the Sync message to the CPU.
At the downstream PTP Slave device, when the second Sync message is received, the exit bandwidth w3= (cnt 2out-cnt1 out)/(T2 out-T1 out) of the upstream device PTP Master may be calculated, and the entry bandwidth w4= (cnt 2in-cnt1 in)/(T2 in-T1 in) of the present device may be calculated.
In the embodiments shown in fig. 2, 3 and 4, the bandwidth of the PTP Sync message at the time of sending, traversing and receiving can be accurately calculated, so that the accurate bandwidth of the full path flow of the PTP Sync message can be known, and the decision making by the network manager is facilitated according to the bandwidth information associated with each other.
The bandwidth monitoring method provided by the embodiment of the disclosure can calculate the bandwidth condition of the PTP event message at the moment when the PTP event message flows through each equipment node, and can correlate all the bandwidth conditions of the PTP event message, thereby being convenient for an upper protocol to analyze and timely make adjustment.
Fig. 5 is a flowchart of a bandwidth monitoring method according to another exemplary embodiment of the present disclosure, where, as shown in fig. 5, the bandwidth monitoring method may include:
s501: the bandwidth computing device receives a PTP message sent by the PTP device, wherein the PTP message carries a time stamp and stream statistical information corresponding to the time.
The embodiment of the disclosure provides a monitoring method for accurate bandwidth real-time association in a PTP (precision time protocol) packet synchronization network, which utilizes periodic PTP packets to sample time stamp and stream statistics information, wherein the time stamp and the stream statistics are at the same time, and the PTP packets are used for carrying time and stream statistics information required by calculating the real-time bandwidth.
In an example embodiment of the present disclosure, the reserved field of the PTP message stores flow statistics. The time and flow statistical information required by calculating the real-time bandwidth can be carried by the PTP message, the message is directly reported to the bandwidth calculating equipment, and the bandwidth condition of the moment when the PTP message flows through each equipment node can be calculated.
In an example embodiment of the present disclosure, the end of PTP messages store flow statistics. For the PTP message that is not sent to the bandwidth computing device, the timestamp and the flow statistics information stored in the PTP message may be extracted, and then the extracted timestamp and flow statistics information may be sent to the bandwidth computing device.
The manner of sending the extracted time stamp and stream statistics information to the bandwidth computing device can be customized, for example, the bandwidth computing device or the PTP device (such as network management device) has special interactive messages, various information can be interacted, a special message can be defined, and the extracted time stamp and stream statistics information are put in the special message and sent to the bandwidth computing device.
S502: the bandwidth calculation device calculates a bandwidth from the time stamp and the stream statistics information.
The PTP message carries time and flow statistical information required by calculating real-time bandwidth, and the bandwidth condition of the PTP message when passing through the equipment node can be accurately calculated by using the flow statistical information and the time information.
In an example embodiment of the present disclosure, the bandwidth monitoring method may further include: receiving packaging information sent by PTP equipment, wherein the packaging information comprises a time stamp and stream statistical information of corresponding time;
calculating bandwidth from the time stamp and the stream statistics may include: calculating bandwidth according to stream statistical information carrying time stamp and corresponding time in PTP message; alternatively, the bandwidth is calculated according to the time stamp in the package information and the stream statistics information of the corresponding time.
The PTP device transmits the time stamp and the stream statistics to a bandwidth calculation device, which calculates a bandwidth from the time stamp and the stream statistics. The bandwidth calculating device may calculate the bandwidth according to the time stamp and the stream statistics information by using an existing scheme, for example, the bandwidth w= (cnt 2-cnt 1)/(T2-T1), where T1 and T2 are time stamps carried by two adjacent messages respectively, and cnt1 and cnt2 are stream statistics information carried by two adjacent messages respectively.
According to the bandwidth monitoring method provided by the embodiment of the disclosure, PTP messages are adopted to carry time and flow statistical information required by calculating real-time bandwidth, sampling time intervals are accurate, and therefore calculated bandwidth is accurate. And the time stamp and stream statistical information carried by the PTP message are utilized to calculate the bandwidth, software timing training is not needed to read sampling information, and the CPU is not needed to be interrupted at regular time, so that timing resources are saved, and bandwidth resources are saved.
In an example embodiment of the present disclosure, the types of received time stamps and statistical flow information may include one or more of the following:
portal time stamp and portal flow statistic information of the own node, which are sent by PTP equipment as slave nodes;
the exit timestamp and the exit flow statistical information of the upstream node which are sent by PTP equipment serving as the slave node;
ingress time stamp and ingress flow statistics of the own node, and egress time stamp and egress flow statistics sent on PTP devices as PTP TC nodes.
The embodiments shown in fig. 2, 3 and 4 can be seen in detail, and the bandwidth of the PTP Sync message at the time of sending, traversing and receiving can be accurately calculated, so that the accurate bandwidth of the full path flow of the PTP Sync message can be known, and the decision making by the network manager is facilitated according to the related bandwidth information.
Fig. 6 is a block diagram of a PTP device provided by an embodiment of the present disclosure, and as shown in fig. 6, the PTP device may include: a memory 61 and a processor 62.
The memory is used to store instructions for execution and the processor may be a central processing unit (Central Processing Unit, CPU for short), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC for short), or one or more integrated circuits that implement embodiments of the present invention. When the PTP device is running, communication between the processor and the memory is performed, and the processor invokes execution instructions for performing the following operations:
Receiving a PTP message, sampling a time stamp and stream statistical information, and storing the time stamp and the stream statistical information in the PTP message;
and sending the time stamp and the stream statistical information to bandwidth computing equipment so that the bandwidth computing equipment calculates the bandwidth according to the time stamp and the stream statistical information.
In an example embodiment of the present disclosure, the time stamp of the sample and the stream statistics may include at least one of: the ingress time stamp and ingress flow statistics sampled at the time of the PTP message ingress port, and the egress time stamp and egress flow statistics sampled at the time of the PTP message egress port.
In an example embodiment of the present disclosure, the storing, by the processor, the flow statistics in the PTP packet may include:
storing the flow statistical information in a reserved field of the PTP message;
or alternatively, the process may be performed,
and storing the stream statistical information at the tail of the PTP message.
In an example embodiment of the present disclosure, the storing, by the processor, the flow statistics in a reserved field of the PTP packet may include:
and storing the flow statistical information in a reserved field of the V2 version or a messageTypeSpecific field of the V3 version of the PTP message.
In an example embodiment of the present disclosure, the processor sending the timestamp and the flow statistics to the bandwidth computing device may include:
the PTP message carrying the time stamp and the stream statistics information is uploaded to the bandwidth computing equipment;
or alternatively, the process may be performed,
and extracting the time stamp and the stream statistical information stored in the PTP message and sending the extracted time stamp and the stream statistical information to the bandwidth computing equipment.
In an example embodiment of the present disclosure, the processor samples the time stamp and the flow statistics and stores the time stamp and the flow statistics in the PTP packet, may include: the PTP equipment samples an entry time stamp and entry flow statistical information, stores the entry time stamp in a time stamp field or the end of a message of the PTP message, and stores the entry flow statistical information in a reserved field of the PTP message;
the processor sending the timestamp and stream statistics to a bandwidth computing device may include: the PTP device sends the PTP message carrying the entry time stamp and the entry flow statistical information to the bandwidth computing device.
In an example embodiment of the present disclosure, the processor samples the time stamp and the flow statistics and stores the time stamp and the flow statistics in the PTP packet, may include: the PTP equipment samples an entry time stamp and entry flow statistical information, stores the entry time stamp in a time stamp field or the end of a message of the PTP message, and stores the entry flow statistical information in a reserved field of the PTP message; the PTP equipment samples an outlet time stamp and outlet flow statistical information, extracts the inlet time stamp and the inlet flow statistical information stored in the PTP message, stores the outlet flow statistical information in a reserved field of the PTP message, and stores the outlet time stamp in a time stamp field or the end of the PTP message;
The processor sending the timestamp and stream statistics to a bandwidth computing device may include: and packaging the entry timestamp, the entry stream statistics, the exit timestamp and the exit stream statistics to the bandwidth computing device.
In an example embodiment of the present disclosure, the processor samples the time stamp and the flow statistics and stores the time stamp and the flow statistics in the PTP packet, may include: the PTP equipment samples an outlet time stamp and outlet flow statistical information, stores the outlet time stamp in a time stamp field or the end of a message of the PTP message, stores the outlet flow statistical information in a reserved field of the PTP message, and sends the PTP message to downstream PTP equipment;
the processor sending the timestamp and stream statistics to a bandwidth computing device may include: and extracting the exit time stamp and the exit flow statistical information stored in the PTP message and sending the extracted exit time stamp and the exit flow statistical information to the bandwidth computing equipment.
In an example embodiment of the present disclosure, a processor receives a PTP packet, samples a time stamp and stream statistics, and stores the time stamp and stream statistics in the PTP packet, may include: the PTP equipment receives a PTP message sent by upstream PTP equipment, and extracts an outlet timestamp and outlet flow statistical information of the PTP message in the upstream PTP equipment from the PTP message; the PTP equipment samples the entry time stamp of the current equipment and the entry flow statistical information of the current equipment, stores the entry time stamp of the current equipment at the end of the PTP message, and stores the entry flow statistical information of the current equipment in a reserved field of the PTP message;
The processor sending the timestamp and stream statistics to a bandwidth computing device may include: the upstream PTP device's exit timestamp and exit flow statistics, and the current device's entry timestamp and entry flow statistics are packetized and sent to the bandwidth computing device.
Fig. 7 is a block diagram of a bandwidth computing device according to an embodiment of the present disclosure, where, as shown in fig. 7, the bandwidth computing device may include: a memory 71 and a processor 72.
The memory is used to store instructions for execution and the processor may be a central processing unit (Central Processing Unit, CPU for short), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC for short), or one or more integrated circuits that implement embodiments of the present invention. When the bandwidth computing device is running, communication between the processor and the memory, the processor invokes execution instructions for performing the following operations:
receiving a PTP message sent by PTP equipment, wherein the PTP message carries a time stamp and stream statistical information of corresponding time; and calculating bandwidth according to the time stamp and the stream statistical information.
In an example embodiment of the present disclosure, the bandwidth computing device and the PTP device may be the same device, or the bandwidth computing device and the PTP device may be two different devices.
In an example embodiment of the present disclosure, the reserved field of the PTP packet stores the flow statistics; or, the end tail of the PTP message stores the stream statistical information.
In an example embodiment of the present disclosure, the types of received time stamps and statistical flow information may include one or more of the following:
portal time stamp and portal flow statistic information of the own node, which are sent by PTP equipment as slave nodes;
the exit timestamp and the exit flow statistical information of the upstream node which are sent by PTP equipment serving as the slave node;
ingress time stamp and ingress flow statistics of the own node, and egress time stamp and egress flow statistics sent on PTP devices as PTP TC nodes.
In an example embodiment of the disclosure, the processor is further to: receiving packaging information sent by PTP equipment, wherein the packaging information comprises a time stamp and stream statistical information of corresponding time;
the processor calculates a bandwidth from the time stamp and the flow statistics, and may include: calculating bandwidth according to stream statistical information carrying time stamp and corresponding time in PTP message; or, calculating bandwidth according to the time stamp in the packaging information and the stream statistical information of the corresponding time.
The embodiment of the disclosure also provides a bandwidth monitoring system, which comprises the PTP device shown in any embodiment and the bandwidth computing device shown in any embodiment.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

Claims (16)

1. A method of bandwidth monitoring, comprising:
PTP equipment receives a PTP message, samples a time stamp and stream statistical information, and stores the time stamp and the stream statistical information in the PTP message;
the PTP device sends the time stamp and the stream statistical information to a bandwidth computing device so that the bandwidth computing device calculates the bandwidth according to the time stamp and the stream statistical information.
2. The method of claim 1, wherein the time stamps and stream statistics of the PTP device samples include at least one of: the ingress time stamp and ingress flow statistics sampled at the time of the PTP message ingress port, and the egress time stamp and egress flow statistics sampled at the time of the PTP message egress port.
3. The method of claim 1, wherein storing flow statistics in the PTP message comprises:
storing the flow statistical information in a reserved field of the PTP message;
or alternatively, the process may be performed,
and storing the stream statistical information at the tail of the PTP message.
4. The method of claim 3, wherein storing the flow statistics in a reserved field of the PTP message comprises:
and storing the flow statistical information in a reserved field of the V2 version or a messageTypeSpecific field of the V3 version of the PTP message.
5. The method of claim 1, wherein the PTP device sending the timestamp and flow statistics to a bandwidth computing device, comprising:
the PTP message carrying the time stamp and the stream statistics information is uploaded to the bandwidth computing equipment;
or alternatively, the process may be performed,
and extracting the time stamp and the stream statistical information stored in the PTP message and sending the extracted time stamp and the stream statistical information to the bandwidth computing equipment.
6. The method of claim 1, wherein the step of determining the position of the substrate comprises,
the PTP device samples the time stamp and the flow statistics and stores the time stamp and the flow statistics in the PTP message, including: the PTP equipment samples an entry time stamp and entry flow statistical information, stores the entry time stamp in a time stamp field or the end of a message of the PTP message, and stores the entry flow statistical information in a reserved field of the PTP message;
the PTP device sending the timestamp and stream statistics to a bandwidth computing device, comprising: the PTP device sends the PTP message carrying the entry time stamp and the entry flow statistical information to the bandwidth computing device.
7. The method of claim 1, wherein the step of determining the position of the substrate comprises,
The PTP device samples the time stamp and the flow statistics and stores the time stamp and the flow statistics in the PTP message, including: the PTP equipment samples an entry time stamp and entry flow statistical information, stores the entry time stamp in a time stamp field or the end of a message of the PTP message, and stores the entry flow statistical information in a reserved field of the PTP message; the PTP equipment samples an outlet time stamp and outlet flow statistical information, extracts the inlet time stamp and the inlet flow statistical information stored in the PTP message, stores the outlet flow statistical information in a reserved field of the PTP message, and stores the outlet time stamp in a time stamp field or the end of the PTP message;
the PTP device sending the timestamp and stream statistics to a bandwidth computing device, comprising: and packaging the entry timestamp, the entry stream statistics, the exit timestamp and the exit stream statistics to the bandwidth computing device.
8. The method of claim 1, wherein the step of determining the position of the substrate comprises,
the PTP device samples the time stamp and the flow statistics and stores the time stamp and the flow statistics in the PTP message, including: the PTP equipment samples an outlet time stamp and outlet flow statistical information, stores the outlet time stamp in a time stamp field or the end of a message of the PTP message, stores the outlet flow statistical information in a reserved field of the PTP message, and sends the PTP message to downstream PTP equipment;
The PTP device sending the timestamp and stream statistics to a bandwidth computing device, comprising: and extracting the exit time stamp and the exit flow statistical information stored in the PTP message and sending the extracted exit time stamp and the exit flow statistical information to the bandwidth computing equipment.
9. The method of claim 1, wherein the step of determining the position of the substrate comprises,
the PTP device receives a PTP message, samples a time stamp and stream statistics information, and stores the time stamp and stream statistics information in the PTP message, including: the PTP equipment receives a PTP message sent by upstream PTP equipment, and extracts an outlet timestamp and outlet flow statistical information of the PTP message in the upstream PTP equipment from the PTP message; the PTP equipment samples the entry time stamp of the current equipment and the entry flow statistical information of the current equipment, stores the entry time stamp of the current equipment at the end of the PTP message, and stores the entry flow statistical information of the current equipment in a reserved field of the PTP message;
the PTP device sending the timestamp and stream statistics to a bandwidth computing device, comprising: the upstream PTP device's exit timestamp and exit flow statistics, and the current device's entry timestamp and entry flow statistics are packetized and sent to the bandwidth computing device.
10. A method of bandwidth monitoring, comprising:
the bandwidth computing equipment receives a PTP message sent by PTP equipment, wherein the PTP message carries a time stamp and stream statistical information of corresponding time;
the bandwidth calculation device calculates a bandwidth from the time stamp and the flow statistics.
11. The method of claim 10, wherein the step of determining the position of the first electrode is performed,
the reserved field of the PTP message stores the flow statistical information;
or, the end tail of the PTP message stores the stream statistical information.
12. The method of claim 10, wherein the received time stamp and the category of statistical stream information include one or more of:
portal time stamp and portal flow statistic information of the own node, which are sent by PTP equipment as slave nodes;
the exit timestamp and the exit flow statistical information of the upstream node which are sent by PTP equipment serving as the slave node;
ingress time stamp and ingress flow statistics of the own node, and egress time stamp and egress flow statistics sent on PTP devices as PTP TC nodes.
13. The method according to claim 10, wherein the method further comprises:
receiving packaging information sent by PTP equipment, wherein the packaging information comprises a time stamp and stream statistical information of corresponding time;
Said calculating bandwidth from said time stamp and said flow statistics comprises: calculating bandwidth according to stream statistical information carrying time stamp and corresponding time in PTP message; or, calculating bandwidth according to the time stamp in the packaging information and the stream statistical information of the corresponding time.
14. A PTP device comprising a memory for storing execution instructions and a processor; the processor invokes the execution instructions for performing the bandwidth monitoring method according to any of claims 1-9.
15. A bandwidth computing device comprising a memory and a processor, the memory configured to store execution instructions; the processor invokes the execution instructions for performing the bandwidth monitoring method according to any of claims 10-13.
16. A bandwidth monitoring system comprising the PTP device of claim 14 and the bandwidth calculating device of claim 15.
CN202310009047.3A 2023-01-04 2023-01-04 Bandwidth monitoring method, system, PTP equipment and bandwidth computing equipment Pending CN116112402A (en)

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