WO2022100392A1

WO2022100392A1 - Service transmission method, system, and computer-readable storage medium

Info

Publication number: WO2022100392A1
Application number: PCT/CN2021/125270
Authority: WO
Inventors: 胡骞; 霍晓莉; 荆瑞泉
Original assignee: 中国电信股份有限公司
Priority date: 2020-11-12
Filing date: 2021-10-21
Publication date: 2022-05-19
Also published as: CN114499735B; CN114499735A

Abstract

Provided by the present disclosure are a service transmission method used for a service transmission line and a service transmission network management system. The service transmission line comprises a CPE device and a local OTN device communicatively connected to the CPE device. The service transmission method comprises: setting a first speed limit point at a user network side interface of the CPE device, so that service traffic is transmitted at a first speed limit bandwidth at the user network side interface, and the first speed limit bandwidth is CIR; setting a second speed limit point at the local OTN device, so that the service traffic is transmitted at a second speed limit bandwidth at the local OTN device, an initial value of the second speed limit bandwidth being CIR×α, and α being the ratio of the number of bytes of the service traffic after the bytes are increased by the CPE device and the number of bytes before increasing the bytes; in a detection time window, counting the total number of bytes of the service traffic and the number of data packets received by the local OTN device, and calculating the average length of the data packets according to the total number of bytes and the number of data packets; and adjusting the second speed limit bandwidth according to the average length of the data packets.

Description

Service transmission method, system and computer-readable storage medium

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is based on the CN application number 202011263522.2 and the filing date is Nov. 12, 2020, and claims its priority. The disclosure of the CN application is hereby incorporated into the present application as a whole.

technical field

The present disclosure relates to the field of communication technologies, and in particular, to a service transmission method for a service transmission line, a service transmission network management system, and a computer-readable storage medium.

Background technique

The speed limit of Ethernet ports is generally only for CPE (Customer Premise Equipment) access equipment (for example, switches, routers, etc.), but in OTN (Optical Transport Network, Optical Transport Network) network, for small For granular Ethernet services (for example, no more than 1000M), Ethernet packet processing is often performed in multiple OTN devices.

At present, the port speed limit is mainly realized through the optimization of the token bucket algorithm or the adjustment of parameters. However, in the OTN network, since the ODU (Optical Data Unit, optical data unit) is a rigid pipe, different CIR (Committed Information Rate, committed information rate) and PIR (Peak Information Rate, the highest information rate) are not set for Ethernet services. Meaning, generally take CIR=PIR, which makes it impossible to implement a more refined speed limit mode through the token bucket algorithm.

SUMMARY OF THE INVENTION

According to one aspect of the present disclosure, a service transmission method for a service transmission line is provided, wherein the service transmission line includes a customer premise equipment CPE device and a central office optical transport network OTN communicatively connected to the CPE device device, the service transmission method includes: setting a first speed limit point at the user network side interface of the CPE device, so that service traffic is transmitted at the user network side interface with a first speed limit bandwidth, wherein the first speed limit A rate-limited bandwidth is the committed information rate CIR; a second rate-limiting point is set at the central office OTN device, so that the service traffic is transmitted in the central office OTN device with the second rate-limited bandwidth, and the second rate-limited bandwidth is The initial value of the high-speed bandwidth is CIR×α, where α is the ratio of the number of bytes after the increase of bytes to the number of bytes before the increase of bytes of the service traffic through the CPE device; statistics are collected within the detection time window. The total number of bytes of the service traffic received by the central office OTN device and the number of received data packets, and the average length of the data packets is calculated according to the total number of bytes and the number of data packets; and according to the average length of the data packets The length adjusts the second rate-limiting bandwidth.

In some embodiments, the setting range of the detection time window is T ₀ to T _max , where T ₀ is the initial value of the detection time window, and T _max is the maximum value of the detection time window; the service The transmission method further includes: taking ΔT as a step time, gradually increasing the detection time window from the T ₀ to the T _max , where ΔT>0.

In some embodiments, the service transmission method further includes: judging whether a packet loss phenomenon occurs in the last detection time window T _n-1 , where n is a positive integer greater than or equal to 1; If no packet loss occurs within the detection time window T _n-1 , the current detection time window T _n is adjusted to T _n =min(T _n-1 +ΔT,T _max ), where T _n ≤T _max ; If packet loss occurs in the last detection time window Tn _-1 , the current detection time window Tn _is adjusted to Tn=β×Tn _-1 , where ₀ <β<1.

In some embodiments, the relational expression for calculating the average length L _pkt of the data packet is:

Wherein, R _byte is the total number of bytes of the received service traffic, and R _num is the number of received data packets; according to the average length L _pkt of the data packets, the second rate-limiting bandwidth B ₂ is adjusted to be

Wherein, B ₁ is the first rate-limited bandwidth, and γ is the number of bytes added by the service traffic after passing through the CPE device.

In some embodiments, the range of the α is 1<α≦1.06; the γ is 4.

According to another aspect of the present disclosure, a service transmission network management system for a service transmission line is provided, wherein the service transmission line includes a customer premise equipment CPE device and a central office optical transmission device communicatively connected to the CPE device network OTN equipment, the service transmission network management system includes: a first rate limit point setting unit, configured to set a first rate limit point at the user network side interface of the CPE device, so that the service traffic flows on the user network side interface Transmission with a first rate-limiting bandwidth, wherein the first rate-limiting bandwidth is the committed information rate CIR; a second rate-limiting point setting unit is configured to set a second rate-limiting point at the central office OTN device, so that all The service traffic is transmitted in the central office OTN device with a second rate-limited bandwidth, and the initial value of the second rate-limited bandwidth is CIR×α, where α is the additional bytes of the service traffic passing through the CPE device. The ratio of the number of bytes after and the number of bytes before the increase of bytes; the statistical unit is used to count the total number of bytes of service traffic received by the OTN device at the central office and the number of received data packets within the detection time window, Calculate the average length of the data packets according to the total number of bytes and the data packets; and a bandwidth adjustment unit, configured to adjust the second speed limit bandwidth of the second speed limit point according to the average length of the data packets.

In some embodiments, the setting range of the detection time window is T ₀ to T _max , where T ₀ is the initial value of the detection time window, and T _max is the maximum value of the detection time window; the service The transmission network management system further includes: a time window adjustment unit, configured to take ΔT as a step time, and gradually increase the detection time window from the T ₀ to the T _max , where ΔT>0.

In some embodiments, the time window adjustment unit is configured to determine whether a packet loss phenomenon occurs in the last detection time window T _n-1 , where n is a positive integer greater than or equal to 1. If no packet loss occurs within the detection time window T _n-1 , the current detection time window T _n is adjusted to T _n =min(T _n-1 +ΔT,T _max ), where T _n ≤T _max , if If packet loss occurs in the last detection time window Tn _-1 , the current detection time window Tn _is adjusted to Tn=β×Tn _-1 , where ₀ <β<1.

In some embodiments, the relational expression for calculating the average length L _pkt of the data packet by the statistical unit is:

Wherein, R _byte is the total number of bytes of the received service traffic, R _num is the number of received data packets; and the bandwidth adjustment unit adjusts the second rate-limiting bandwidth B ₂ according to the average length L _pkt of the data packets for

In some embodiments, the range of the α is 1<α≦1.06; the γ is 4.

According to another aspect of the present disclosure, there is provided a service transmission network management system for a service transmission line, comprising: a memory; and a processor coupled to the memory, the processor being configured to The instructions of the memory execute the method as previously described.

According to another aspect of the present disclosure, there is provided a non-transitory computer-readable storage medium having computer program instructions stored thereon which, when executed by a processor, implement the aforementioned method.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which form a part of the specification, illustrate embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure.

The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, wherein:

1 is a flowchart illustrating a service transmission method for a service transmission line according to some embodiments of the present disclosure;

FIG. 2 is a schematic structural diagram illustrating a service transmission line according to some embodiments of the present disclosure;

3 is a schematic structural diagram illustrating a service transmission network management system for service transmission lines according to some embodiments of the present disclosure;

4 is a schematic structural diagram illustrating a service transmission network management system for service transmission lines according to other embodiments of the present disclosure;

FIG. 5 is a schematic structural diagram illustrating a service transmission network management system for a service transmission line according to other embodiments of the present disclosure.

Detailed ways

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

Meanwhile, it should be understood that, for the convenience of description, the dimensions of various parts shown in the accompanying drawings are not drawn in an actual proportional relationship.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application or uses in any way.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.

In all examples shown and discussed herein, any specific value should be construed as illustrative only and not as limiting. Accordingly, other examples of exemplary embodiments may have different values.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

The inventor of the present disclosure found that due to the rigid pipe characteristics of ODU, although different Ethernet services can share the ODU0 channel, the occupied bandwidth of Ethernet services will be fixed when configuring a single station. Adding SVLAN (Service Virtual Local Area Network, service virtual local area network) will increase the egress service rate, and will require the central office OTN device connected to the CPE to configure a larger bandwidth to ensure no packet loss. If this value is too high, resources will be wasted, resulting in The OTN private line service cost is high; however, if the same rate limit is applied to the OTN equipment at the central office, the rate limit will be inaccurate due to the addition of SVLANs to the CPE equipment. Therefore, the inventors of the present disclosure have found that the known rate limiting of service transmission lines may result in inaccurate rate limiting due to byte expansion when devices add SVLANs to packets, which may easily lead to resource waste or packet loss.

In view of this, the inventor of the present disclosure proposes a service transmission method for a service transmission line, so that the speed of the service transmission line can be more accurately limited.

FIG. 1 is a flowchart illustrating a traffic transmission method for a traffic transmission line according to some embodiments of the present disclosure. As shown in FIG. 1 , the method includes steps S102 to S108. FIG. 2 is a schematic structural diagram illustrating a service transmission line according to some embodiments of the present disclosure. As shown in FIG. 2 , the service transmission line includes a CPE device 210 and a central office OTN device 220 communicatively connected to the CPE device 210 . For example, both the CPE device 210 and the central office OTN device 220 may implement an ETH (Ethernet, Ethernet) connection. Additionally, a metro or backbone OTN 230 is also shown in FIG. 2 .

The following describes in detail a service transmission method for a service transmission line according to some embodiments of the present disclosure with reference to FIG. 1 and FIG. 2 .

As shown in FIG. 1 and FIG. 2 , in step S102 , a first rate limit point is set at the user network side interface 211 of the CPE device 210 , so that the service traffic is transmitted on the user network side interface 211 with the first rate limit bandwidth. The first rate-limiting bandwidth is CIR. Here, CIR is the service commitment bandwidth.

As shown in FIG. 1 and FIG. 2 , in step S104 , a second rate limiting point is set at the central office OTN device 220 , so that the service traffic is transmitted at the central office OTN device 220 with the second rate limiting bandwidth. The initial value of the second rate-limiting bandwidth is CIR×α, where α is the ratio of the number of bytes after the increase of bytes to the number of bytes before the increase of bytes of the service traffic through the CPE device. In some embodiments, α ranges from 1<α≤1.06. For example, a=1.06.

For example, the SVLAN packet length is calculated as follows:

According to the 802.3 protocol, the original Ethernet packet length is 64 bytes to 1518 bytes.

According to the 802.1q protocol, after adding a layer of VLAN (for example, CVLAN (customer VLAN, user virtual local area network), 4 bytes), the packet length is 68 bytes to 1522 bytes.

According to the 802.1ad protocol, it is allowed to continue adding 4-byte SVLANs in the outer layer of CVLAN in QinQ mode.

For example, a CVLAN has been added to a packet entering the CPE device 210, and the packet length ranges from 68 bytes to 1522 bytes. In the NNI (Network to Network Interface, network node interface) 212 of the CPE device, SVLAN (fixed 4 bytes) is added to each packet. Therefore, adding SVLANs through the CPE device will increase the packet length by at most 4/68≈5.89%, and at least by 4/1522≈0.26%. The above α is the ratio of the number of bytes after the increase of bytes to the number of bytes before the increase of bytes of the service traffic through the CPE device.

Considering that some devices or instruments allow the minimum message to be 64 bytes after adding CVLAN, and considering the difference in the definition of message length in different standards, the present disclosure does not limit the message length, that is, the method of the present disclosure does not limit the length of any message. It is applicable to Ethernet packets in the range of packet lengths. In the above embodiment, 6% is taken as the maximum influence value. Therefore, the range of the value of α may be 1<α≤1.06.

As shown in FIG. 1 and FIG. 2 , in step S106, the total number of bytes of service traffic received by the OTN device 220 at the central office and the number of received data packets are counted within the detection time window, and according to the total number of bytes and the number of data packets number to calculate the average length of the packet.

For example, the relationship for calculating the average length of the data packet L _pkt is:

Among them, R _byte is the total number of bytes of the received service traffic, and R _num is the number of received data packets.

As shown in FIG. 1 and FIG. 2, in step S108, the second rate-limiting bandwidth is adjusted according to the average length of the data packets.

In some embodiments, the second rate-limiting bandwidth B ₂ is adjusted according to the average length L _pkt of the data packets to be

Among them, B ₁ is the first rate-limited bandwidth, and γ is the number of bytes added by the service traffic after passing through the CPE device. For example, γ is 4. Here, 4 bytes are the number of bytes added to the SVLAN by the CPE device.

So far, a service transmission method for a service transmission line according to some embodiments of the present disclosure has been provided. The service transmission line includes the CPE equipment and the central office OTN equipment communicatively connected with the CPE equipment. The service transmission method includes: setting a first speed limit point at the user network side interface of the CPE device, so that the service traffic is transmitted at the user network side interface with the first speed limit bandwidth, wherein the first speed limit bandwidth is CIR; A second rate-limiting point is set at the OTN device, so that the service traffic is transmitted on the OTN device at the central office with the second rate-limiting bandwidth. The initial value of the second rate-limiting bandwidth is CIR×α, where α is the service traffic passing through the CPE The ratio of the number of bytes after the device adds bytes to the number of bytes before adding bytes; the total number of bytes of service traffic received by the OTN device at the central office and the number of received data packets are counted within the detection time window. Calculate the average length of the data packets according to the number of nodes and the number of data packets; and adjust the second rate-limiting bandwidth according to the average length of the data packets. Therefore, the speed limit bandwidth of the second speed limit point can be dynamically changed. The above method can make the service transmission line (such as OTN private line network) more accurately limit the speed according to the bandwidth requirements of the user, save the ODU resources of the OTN equipment at the central office, thereby reducing the service cost of the line, and can also try to prevent the occurrence of packet loss. occur.

In some embodiments, the setting range of the detection time window is T ₀ to T _max , where T ₀ is the initial value of the detection time window, and T _max is the maximum value of the detection time window. The service transmission method may further include: taking ΔT as a step time, gradually increasing the detection time window from T ₀ to T _max , where ΔT>0. That is, the detection time window is gradually increased by ΔT, thereby gradually increasing from T ₀ to T _max . In this way, the dynamic adjustment of the detection time window is realized.

In some embodiments, the service transmission method may further include: judging whether a packet loss phenomenon occurs in the last detection time window T _n-1 , where n is a positive integer greater than or equal to 1.

The service transmission method further includes: if no packet loss occurs within the last detection time window T _n-1 , adjusting the current detection time window T _n to T _n =min(T _n-1 +ΔT,T _max ), where T _n ≤ T _max . Here min(T _n-1 +ΔT,T _max ) means taking the smaller of T _n-1 +ΔT and T _max . This can ensure that when there is no packet loss, the detection time window gradually increases and converges to a larger value T _max , thereby avoiding frequent bandwidth adjustment as much as possible.

The service transmission method further includes: if a packet loss phenomenon occurs in the last detection time window T _n-1 , adjusting the current detection time window T _n to T _n =β×T _n-1 , where 0<β < 1. For example, β=0.5. This ensures that the detection time window can be quickly shortened when packet loss occurs, and a new second rate limit bandwidth can be calculated and delivered as soon as possible by re-counting the average packet length, so as to adjust to a reasonable rate limit as soon as possible.

In the above-mentioned embodiment, the second speed limit point uses the detection time window T as a period to dynamically limit the speed, and the detection time window T adopts the determination rule of Additive Increase Multiplicative Decrease (AIMD for short) . By setting the detection time window T according to such a determination rule, we can try our best to ensure that when there is no packet loss, the detection time window gradually increases and converges to a larger value T _max , avoiding frequent bandwidth adjustment as much as possible, and ensuring that there is no packet loss. , quickly reduce the detection time window, calculate and deliver a new second rate limit bandwidth by re-statistics of the average packet length as soon as possible, so as to adjust to a reasonable rate limit as soon as possible.

In the above service transmission method, two speed limit points are set to limit the speed of the CPE device and the central office OTN device respectively. The first rate limit is based on the promised bandwidth of the service, and the second rate limit takes into account that the addition of CPE devices, such as SVLAN, causes the packet length to increase, and the increase is related to the packet length. The initial rate limit value is the shortest packet for all service flows. Afterwards, the total number of bytes received and the number of received data packets are counted in the detection time window, the average packet length is calculated, and the rate is dynamically limited according to the average packet length. The detection time window of the second rate limit point allows dynamic adjustment to avoid frequent bandwidth adjustment when there is no packet loss, and to converge to a reasonable rate limit as soon as possible when there is a packet loss.

For example, assuming that the user's service bandwidth requirement is 100M, the packet length ranges from 64 bytes to 1518 bytes, the data packets carry CVLAN when entering the private line CPE device, and the SVLAN identifier needs to be added in the OTN network, then the first speed limit point can be limited to 100M. , the second speed limit point can initially limit the speed by 100M*6%, and then count the average packet length within T ₀ , and adjust the speed limit bandwidth value of the second speed limit point in the next time window according to the aforementioned calculation principles, and the time window T The value can also be adjusted according to the aforementioned method.

FIG. 3 is a schematic structural diagram illustrating a service transmission network management system for service transmission lines according to some embodiments of the present disclosure. As shown in FIG. 3 , the service transmission line includes a CPE device 210 and a central office OTN device 220 communicatively connected to the CPE device 210 .

As shown in FIG. 3 , the service transmission network management system 300 includes: a first speed limit point setting unit 302 , a second speed limit point setting unit 304 , a statistics unit 306 and a bandwidth adjustment unit 308 .

The first rate limiting point setting unit 302 is configured to set a first rate limiting point at the user network side interface of the CPE device 210, so that the service traffic is transmitted at the first rate limiting bandwidth on the user network side interface. The first rate-limiting bandwidth is CIR.

The second rate limiting point setting unit 304 is configured to set a second rate limiting point at the central office OTN device 220 , so that the service traffic is transmitted in the central office OTN device 220 with the second rate limiting bandwidth. The initial value of the second rate-limited bandwidth is CIR×α, where α is the ratio of the number of bytes after the increase of bytes to the number of bytes before the increase of bytes of the service traffic through the CPE device 210 . For example, the range of α is 1<α≦1.06.

The counting unit 306 is configured to count the total number of bytes of service traffic received by the OTN device 220 at the central office and the number of data packets received within the detection time window, and calculate the average length of the data packets according to the total number of bytes and the number of data packets.

For example, the relational expression for calculating the average length L _pkt of the data packet by the statistical unit 306 is:

The bandwidth adjustment unit 308 is configured to adjust the second rate limit bandwidth of the second rate limit point according to the average length of the data packets.

For example, the bandwidth adjustment unit 308 adjusts the second rate-limiting bandwidth B ₂ according to the average length L _pkt of the data packet to be

Among them, B ₁ is the first rate-limited bandwidth, and γ is the number of bytes added by the service traffic after passing through the CPE device. For example, γ is 4.

So far, a service transmission network management system for a service transmission line according to some embodiments of the present disclosure has been provided. In the service transmission network management system, the first speed limit point setting unit sets the first speed limit point at the user network side interface of the CPE device, so that the service traffic is transmitted at the user network side interface with the first speed limit bandwidth, wherein the first speed limit The first rate-limiting bandwidth is the committed information rate CIR; the second rate-limiting point setting unit sets the second rate-limiting point at the central office OTN device, so that the service traffic is transmitted at the central office OTN device with the second rate-limiting bandwidth, and the second rate-limiting The initial value of the bandwidth is CIR×α; the statistics unit counts the total number of bytes of service traffic received by the OTN device at the central office and the number of received data packets within the detection time window, and calculates the data according to the total number of bytes and the number of data packets the average length of the packets; and the bandwidth adjustment unit adjusts the second rate-limiting bandwidth of the second rate-limiting point according to the average length of the data packets. The above system can make the service transmission line (such as OTN private line network) more accurately limit the speed according to the bandwidth requirements of the user, save the ODU resources of the OTN equipment at the central office, thereby reducing the service cost of the line, and can also try to prevent the occurrence of packet loss. occur.

In some embodiments, the setting range of the detection time window is T ₀ to T _max , where T ₀ is the initial value of the detection time window, and T _max is the maximum value of the detection time window.

In some embodiments, as shown in FIG. 3 , the service transmission network management system 300 may further include a time window adjustment unit 310 . The time window adjustment unit 310 is configured to take ΔT as the step time, and gradually increase the detection time window from T ₀ to T _max , where ΔT>0.

In some embodiments, the time window adjustment unit 310 is configured to determine whether a packet loss phenomenon occurs in T _n-1 in the last detection time window, where n is a positive integer greater than or equal to 1. If no packet loss occurs within T _n-1 , the current detection time window T _n is adjusted to T _n =min(T _n-1 +ΔT,T _max ), where T _n ≤T _max . If packet loss occurs within the time window T _n-1 , the current detection time window T _n is adjusted to T _n =β×T _n-1 , where 0<β<1.

In the embodiment of the present disclosure, on the premise of not changing the software and hardware of the OTN device, existing performance parameters (for example, the number of packets, the number of bytes, etc.) can be collected through the upper-layer network management, and a reasonable bandwidth rate can be calculated. The second speed limit point is used to limit the speed, realize the refined control of the speed limit function, and improve the bandwidth utilization. The method and system of the present disclosure can be applied to all OTN devices that support port rate limiting, and can be supported without changing the software and hardware of the OTN device.

In the above-mentioned method and network management system of the embodiments of the present disclosure, the central office OTN device can undertake the function of aggregating small-granularity Ethernet private line services, manage each service in a refined speed limit, and save ODU resources on the premise of ensuring customer service. Reduce leased line costs.

In the above method and network management system, the first speed limit point ensures that the speed is accurately limited according to the service bandwidth; the second speed limit point dynamically detects the packet length to ensure that the service traffic after adding the SVLAN is occupied on the premise that no packets are lost within the promised rate Minimum resources.

FIG. 4 is a schematic structural diagram illustrating a service transmission network management system for a service transmission line according to other embodiments of the present disclosure. The service transmission network management system includes a memory 410 and a processor 420 . in:

The memory 410 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory is used to store the instructions in the embodiment corresponding to FIG. 1 .

The processor 420 is coupled to the memory 410 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 420 is configured to execute the instructions stored in the memory, which can make the service transmission line more accurately limit the speed according to the bandwidth requirement of the user, save the ODU resources of the OTN equipment at the central office, and thus reduce the service cost of the line.

In some embodiments, as shown in FIG. 5 , the service transmission network management system 500 includes a memory 510 and a processor 520 . Processor 520 is coupled to memory 510 through BUS 530 . The service transmission network management system 500 can also be connected to the external storage device 550 through the storage interface 540 to call external data, and can also be connected to the network or another computer system (not shown) through the network interface 560, which will not be described in detail here. introduce.

In this embodiment, the data instructions are stored in the memory and the above instructions are processed by the processor, so that the service transmission line can be more accurately limited in speed according to the bandwidth requirements of the user, save the ODU resources of the OTN equipment at the central office, and thus reduce the service of the line. cost.

In some other embodiments, the present disclosure also provides a computer-readable storage medium on which computer program instructions are stored, and when the instructions are executed by a processor, implement the steps of the method in the embodiment corresponding to FIG. 1 . As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein .

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

So far, the present disclosure has been described in detail. Some details that are well known in the art are not described in order to avoid obscuring the concept of the present disclosure. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

While some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art will appreciate that the above examples are provided for illustration only, and are not intended to limit the scope of the present disclosure. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

A service transmission method for a service transmission line, wherein the service transmission line includes a customer premises equipment (CPE) device and a central office optical transport network OTN device communicatively connected to the CPE device, and the service transmission method includes:

A first rate limit point is set at the user network side interface of the CPE device, so that service traffic is transmitted on the user network side interface with a first rate limit bandwidth, where the first rate limit bandwidth is the committed information rate (CIR) ;

A second rate-limiting point is set at the central office OTN device, so that the service traffic is transmitted in the central office OTN device with a second rate-limiting bandwidth, and the initial value of the second rate-limiting bandwidth is CIR×α, Wherein, α is the ratio of the number of bytes of the service traffic after adding bytes to the number of bytes before adding bytes through the CPE device;

In the detection time window, count the total number of bytes of service traffic received by the central office OTN device and the number of data packets received, and calculate the average length of the data packets according to the total number of bytes and the number of data packets; and

The second rate-limiting bandwidth is adjusted according to the average length of the data packets.
The service transmission method according to claim 1, wherein,

The setting range of the detection time window is T 0 to T max , where T 0 is the initial value of the detection time window, and T max is the maximum value of the detection time window;

The service transmission method further includes:

Taking ΔT as a step time, the detection time window is gradually increased from the T 0 to the T max , where ΔT>0.
The service transmission method according to claim 2, further comprising:

Determine whether packet loss occurs in the last detection time window T n-1 , where n is a positive integer greater than or equal to 1;

If no packet loss occurred within the last detection time window T n-1 , adjust the current detection time window T n to T n =min(T n-1 +ΔT,T max ), where T n ≤T max ;

If the packet loss phenomenon occurs in the last detection time window T n-1 , the current detection time window T n is adjusted to T n =β×T n-1 , where 0<β<1.
The service transmission method according to claim 1, wherein,

The relational expression for calculating the average length L pkt of the data packet is:

Among them, R byte is the total number of bytes of received service traffic, and R num is the number of received data packets;

The second rate-limiting bandwidth B 2 is adjusted according to the average length L pkt of the data packet to be

Wherein, B 1 is the first rate-limited bandwidth, and γ is the number of bytes added by the service traffic after passing through the CPE device.
The service transmission method according to claim 4, wherein,

The range of the α is 1<α≤1.06;

The γ is 4.
A service transmission network management system for a service transmission line, wherein the service transmission line includes a customer front-end equipment CPE device and a central office optical transport network OTN device communicatively connected to the CPE device, and the service transmission network management system include:

a first rate limiting point setting unit, configured to set a first rate limiting point at the user network side interface of the CPE device, so that service traffic is transmitted at the user network side interface with the first rate limiting bandwidth, wherein the The first rate-limiting bandwidth is the committed information rate CIR;

A second rate-limiting point setting unit, configured to set a second rate-limiting point at the central office OTN device, so that the service traffic is transmitted at the central office OTN device with the second rate-limiting bandwidth, and the second limiting The initial value of the high-speed bandwidth is CIR×α, where α is the ratio of the number of bytes of the service traffic after adding bytes to the number of bytes before the increase of bytes through the CPE device;

The statistical unit is used to count the total number of bytes of service traffic received by the central office OTN device and the number of received data packets within the detection time window, and calculate the number of data packets according to the total number of bytes and the number of data packets. average length; and

A bandwidth adjustment unit, configured to adjust the second rate-limiting bandwidth of the second rate-limiting point according to the average length of the data packets.
The service transmission network management system according to claim 6, wherein,

The setting range of the detection time window is T 0 to T max , where T 0 is the initial value of the detection time window, and T max is the maximum value of the detection time window;

The service transmission network management system further includes:

A time window adjustment unit, configured to take ΔT as a step time, and gradually increase the detection time window from the T 0 to the T max , where ΔT>0.
The service transmission network management system according to claim 7, wherein,

The time window adjustment unit is used to determine whether a packet loss phenomenon occurs in the last detection time window T n-1 , where n is a positive integer greater than or equal to 1. If the last detection time window T n- If no packet loss occurs within 1 , the current detection time window T n is adjusted to T n =min(T n-1 +ΔT,T max ), where T n ≤T max , if in the last detection time window If packet loss occurs within T n-1 , the current detection time window T n is adjusted to T n =β×T n-1 , where 0<β<1.
The service transmission network management system according to claim 6, wherein,

The relational formula for calculating the average length L pkt of the data packet by the statistical unit is:

where R byte is the total number of bytes of service traffic received, and R num is the number of packets received; and

The bandwidth adjustment unit adjusts the second rate-limiting bandwidth B 2 according to the average length L pkt of the data packet to be
Wherein, B 1 is the first rate-limited bandwidth, and γ is the number of bytes added by the service traffic after passing through the CPE device.
The service transmission network management system according to claim 9, wherein,

The range of the α is 1<α≤1.06;

The γ is 4.
A service transmission network management system for service transmission lines, comprising:

memory; and

A processor coupled to the memory, the processor configured to perform the method of any one of claims 1 to 5 based on instructions stored in the memory.
A non-transitory computer-readable storage medium having computer program instructions stored thereon, the instructions implementing the method of any one of claims 1 to 5 when executed by a processor.