CN114866425A - Method and device for adjusting bandwidth of optical service unit connection - Google Patents
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Abstract
The application provides a method and a device for adjusting the bandwidth of optical service unit connection. The method comprises the following steps: determining whether the optical transport network is clear in response to determining that the bandwidth needs to be increased based on traffic information observed in the optical transport network; in response to determining that the optical transport network is clear, sending a first request to a plurality of network devices on the optical transport network indicating to increase the bandwidth in a first mode; in response to determining that the optical transport network is unclogged, sending a second request to the plurality of network devices indicating to increase the bandwidth in a second mode.
Description
Technical Field
The present application relates to the field of optical communications technologies, and in particular, to a method for adjusting a bandwidth of an optical service unit connection.
Background
An Optical Transport Network (OTN) is an optimal choice for a dedicated line service facing a requirement of a large bandwidth and a hard pipeline because of its advantages of security, low delay, low jitter, high reliability, and the like.
With the increase of the demand of professional business of government and enterprise, the industry is always exploring and researching whether a technology can give consideration to the characteristics of high safety and high reliability, and meanwhile, the technology can collect and compile special line business of large and small particles, and the Optical Service Unit (OSU) technology oriented to business is produced by the company. One of the advantages of the optical service unit technology is that second-level lossless bandwidth adjustment can be realized, and the problems of resource waste, insufficient flexibility and the like caused by bandwidth mismatching are solved.
The bandwidth adjusting method in the prior art is single, and the bandwidth adjusting rate and efficiency cannot be adjusted according to the resource condition of network equipment.
Disclosure of Invention
In view of the above, the present application aims to provide a method and an apparatus for adjusting the bandwidth of an optical service unit connection.
In view of the above, one or more embodiments of the present application provide a method for adjusting bandwidth of an optical service unit connection, including:
determining whether the optical transport network is clear in response to determining that the bandwidth needs to be increased based on traffic information observed in the optical transport network;
in response to determining that the optical transport network is clear, sending a first request to a plurality of network devices on the optical transport network indicating to increase the bandwidth in a first mode;
in response to determining that the optical transport network is unclogged, sending a second request to the plurality of network devices indicating to increase the bandwidth in a second mode.
Optionally, the first mode includes an exponential growth mode, and the second mode includes a linear growth mode.
Optionally, determining whether the optical transport network is clear includes:
responsive to determining that the current value of the bandwidth is less than a congestion threshold, determining that the optical transport network is clear;
in response to determining that the current value of the bandwidth is not less than the congestion threshold, determining that the optical transport network is unclogged.
Optionally, the method further includes:
after receiving first response signals which are returned by the plurality of network devices respectively in response to the first requests and indicate that bandwidth adjustment is successful, determining that the bandwidth adjustment is completed;
after receiving a second response signal indicating that the bandwidth adjustment fails and returned by at least one of the plurality of network devices in response to the first request, resending the second request to the plurality of network devices.
Optionally, the method further includes:
after receiving third response signals which are returned by the plurality of network devices respectively in response to the second requests and indicate that the bandwidth adjustment is successful, determining that the bandwidth adjustment is completed;
after receiving a fourth response signal indicating that the bandwidth adjustment fails and returned by at least one of the plurality of network devices in response to the second request, updating the congestion threshold to the current value of the bandwidth, and ending the bandwidth adjustment.
Optionally, the method further includes:
in response to determining from the traffic information that the bandwidth needs to be reduced, sending a third request to the plurality of network devices indicating that the bandwidth is reduced in a third mode.
The third mode includes a linear reduction mode.
Optionally, determining that the bandwidth needs to be increased according to the traffic information includes:
predicting the bandwidth requirement in the next period according to the flow information;
determining that the bandwidth needs to be increased according to the bandwidth requirement and the current value of the bandwidth.
Based on the same inventive concept, one or more embodiments of the present application further provide an apparatus for adjusting a bandwidth of an optical service unit connection, including:
a determination module configured to: determining whether the optical transport network is clear in response to determining that the bandwidth of the optical service unit connection needs to be increased based on traffic information observed in the optical transport network;
a decision module configured to: in response to the determination module determining that the optical transport network is clear, sending a first request to a plurality of network devices on the optical transport network indicating to increase the bandwidth in a first mode; in response to the determination module determining that the optical transport network is unclogged, sending a second request to the plurality of network devices indicating to increase the bandwidth in a second mode.
Optionally, the first mode includes an exponential growth mode, and the second mode includes a linear growth mode.
As can be seen from the foregoing, the method for adjusting the bandwidth of an optical service unit connection, provided in the present application, responds to different traffic conditions of an optical transport network, and sends an instruction to a plurality of network devices on the optical transport network to complete bandwidth adjustment requests in different adjustment modes. One of the advantages of the optical service unit technology is that second-level lossless bandwidth adjustment can be realized, and generating a bandwidth adjustment request according to a traffic monitoring result is the key to realize lossless bandwidth adjustment of the optical service unit, and lossless bandwidth adjustment is the key to the optical transport network technology based on the optical service unit. For the optical transport network based on the optical service unit technology, by adopting the multi-mode bandwidth adjusting method, the network resources can be more efficiently utilized and network services can be provided for clients.
Drawings
In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for the embodiments or related technologies in the following description are briefly introduced, and it is obvious that the drawings in the following description are only the embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart illustrating a method for adjusting bandwidth of an optical service unit connection according to one or more embodiments of the present disclosure;
fig. 2 is a schematic diagram illustrating a determination flow of a method for adjusting a bandwidth of an optical service unit connection according to an embodiment of the present application;
fig. 3 is a schematic diagram illustrating an adjustment process of a method for adjusting a bandwidth of an optical service unit connection according to an embodiment of the present application;
fig. 4 is a schematic diagram of an apparatus for adjusting bandwidth of an optical service unit connection according to one or more embodiments of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to the accompanying drawings in combination with specific embodiments.
It should be noted that technical terms or scientific terms used in the embodiments of the present application should have a general meaning as understood by those having ordinary skill in the art to which the present application belongs, unless otherwise defined. The use of "first," "second," and similar terms in the embodiments of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
As described in the background section, an Optical Transport Network (OTN) is the best choice for private services oriented to the requirements of large bandwidth and hard pipe because of its advantages of security, low latency, low jitter, high reliability, etc. Optical transport networks have also evolved from infrastructure networks oriented towards internal networking applications to bearer networks oriented towards private line services.
However, in the optical transport network hard-pipe dedicated line scheme adopted in the prior art, by placing services into independent optical fiber distribution unit (ODUk) channels, bandwidth is not shared, that is, physical isolation is performed between the ODUk channels. Under the condition, the optical transport network cannot give consideration to the small-particle dedicated line bearing, and the traditional pure hard pipeline technology is difficult to adapt to the dynamic adjustment requirement of the network bandwidth of the current customer. Therefore, the industry is always exploring and researching whether a technology can not only take the characteristics of high safety and high reliability into consideration, but also can compile the special line business of the large and small particles.
As the demand for government and enterprise professional businesses increases, business oriented Optical Service Unit (OSU) technology has emerged. One of the advantages of the optical service unit technology is that second-level lossless bandwidth adjustment can be realized, bandwidth resources are efficiently utilized, and the problems of resource waste, insufficient flexibility and the like caused by bandwidth mismatching are solved.
However, the bandwidth adjusting method in the prior art is single, and cannot adjust the bandwidth adjusting rate and efficiency in real time according to the network device resource condition.
In view of the above, one or more embodiments of the present application provide a method of adjusting a bandwidth of an optical service unit connection, in response to determining that an optical transport network is unobstructed, sending a first request to a plurality of network devices on the optical transport network indicating to increase the bandwidth in a first mode; in response to determining that the optical transport network is unclogged, sending a second request to the plurality of network devices indicating to increase the bandwidth in a second mode. Namely, a bandwidth adjustment request decision method based on service requirements is specified to realize flexible adjustment of OSU connection bandwidth.
The technical solutions of one or more embodiments of the present specification are described in detail below with reference to specific embodiments.
Referring to fig. 1, a method for adjusting bandwidth of an optical service unit connection according to an embodiment of the present specification includes the following steps:
step S101, in response to determining that the bandwidth needs to be increased according to traffic information observed in the optical transport network, determining whether the optical transport network is open.
In this step, it is first determined whether the bandwidth needs to be increased according to the traffic information observed in the optical transport network.
In some embodiments, according to the real-time traffic information observed by the traffic monitoring software sFlow, the data packets passing through the device are sampled, analyzed and counted to obtain the required value of the bandwidth, so as to determine whether the bandwidth needs to be increased.
In response to determining that bandwidth reduction is required, sending a third request to the plurality of network devices indicating to reduce the bandwidth in a third mode. In some embodiments, an adjustment request for a linear reduction mode is sent to the plurality of network devices.
And responding to the determination that the bandwidth needs to be increased, comparing the current value of the bandwidth with the congestion threshold, and judging whether the optical transport network is unblocked.
Step S102, in response to determining that the optical transport network is unobstructed, sending a first request indicating to increase the bandwidth in a first mode to a plurality of network devices on the optical transport network.
In this step, it is determined that the optical transport network is clear in response to determining that the current value of the bandwidth is less than the congestion threshold. Sending a first request to a plurality of network devices on the optical transport network indicating to increase the bandwidth in a first mode. In some embodiments, a request for adjustment of an exponential growth pattern is sent to a plurality of network devices on the optical transport network.
And after receiving first response signals which are returned by the plurality of network devices respectively in response to the first requests and indicate that the bandwidth adjustment is successful, determining that the bandwidth adjustment is completed. In some embodiments, the adjustment is determined to be successful in response to the first response signal.
After receiving a second response signal indicating that the bandwidth adjustment fails and returned by at least one of the plurality of network devices in response to the first request, resending the second request to the plurality of network devices. In some embodiments, the adjustment request for the linear growth mode is retransmitted to the network device in response to the second response signal determining that the adjustment failed.
In the process of implementing the present disclosure, the inventor finds that, if the traffic information of the network is in a change and bandwidth adjustment is performed according to the data rate observed at the current time, the traffic requirement in the interval from the current time to the past time can only be met, and a time period is left from the next bandwidth adjustment, so that the traffic requirement in the interval from the current time to the future time is hardly met as a result of the current bandwidth adjustment.
Thus, in some embodiments, the inventors propose an algorithm to calculate a target demand value. The formula of the algorithm is that B is 2B i In which B is i Is the current bandwidth value; the formula of the algorithm is B ═ B i +λ i Wherein
t is the bandwidth adjustment interval duration, B i Is the current bandwidth value, B i-1 Is the last time bandwidth value.
Step S103, in response to determining that the optical transport network is not clear, sending a second request to the plurality of network devices indicating to increase the bandwidth in a second mode.
In this step, in response to determining that the current value of the bandwidth is greater than the congestion threshold, it is determined that the optical transport network is not clear. Sending a second request to the plurality of network devices indicating to increase the bandwidth in a second mode. In some embodiments, a request for adjustment of a linear growth mode is sent to a plurality of network devices on the optical transport network.
And after receiving third response signals which are returned by the plurality of network devices respectively in response to the second requests and indicate that the bandwidth adjustment is successful, determining that the bandwidth adjustment is completed. In some embodiments, the adjustment is determined to be successful in response to the success signal, the bandwidth adjustment work is determined this time, and the bandwidth adjustment work this time is ended.
After receiving a fourth response signal indicating that the bandwidth adjustment fails and returned by at least one of the plurality of network devices in response to the second request, updating the congestion threshold to the current value of the bandwidth, and ending the bandwidth adjustment. In some embodiments, in response to determining that the adjustment fails according to the failure signal, the congestion threshold is updated to the current value of the bandwidth, and the current bandwidth adjustment is ended.
Hereinafter, the technical solution of the present application when it is determined that the bandwidth needs to be increased is further described in detail through specific embodiments.
Referring first to fig. 2, it is first determined whether the current value of the bandwidth is less than the congestion threshold.
And in response to determining that the current value of the bandwidth is less than the congestion threshold, determining that the optical transport network is clear, and sending an adjustment request of an exponential growth mode to a plurality of network devices on the optical transport network. Stopping the adjustment work after receiving a signal of successful adjustment returned by the equipment; and after receiving a regulation failure signal returned by the equipment, retransmitting the regulation request of the linear growth mode to the plurality of network equipment on the optical transport network.
And in response to determining that the current value of the bandwidth is greater than the congestion threshold, determining that the optical transport network is not clear, and in response to receiving the device adjustment failure signal, sending an adjustment request of a linear growth mode to a plurality of network devices on the optical transport network. Stopping the adjustment work after receiving a signal of successful adjustment returned by the equipment; and after receiving a signal of failed adjustment returned by the equipment, updating the congestion threshold value to be the current value of the bandwidth, and stopping the adjustment work.
Hereinafter, the technical means of the present application will be described in further detail by another specific example.
First, referring to fig. 3, a semantic code transmission method provided in the present application includes the following steps:
according to the observed flow information, the required value of the bandwidth is increased all the time before the bandwidth is adjusted for the 10 th time; after the 10 th adjustment, the required value of bandwidth continues to decrease. And obtaining the value of the broadband of the 1 st adjustment turn as 1, and the initial value of the congestion threshold as 8.
Adjusting the bandwidth a 1 st time in response to determining that the bandwidth needs to be increased; and determining the smoothness of the optical transmission network according to the condition that the current value of the bandwidth is smaller than the initial value of the congestion threshold.
And responding to the unobstructed optical transport network, sending an adjustment request of an exponential growth mode to a plurality of network devices on the optical transport network, and continuously sending the adjustment request after receiving an adjustment success signal returned by the devices.
In the first case, in the 2 nd round, although the congestion threshold is larger than the required value of the bandwidth, after receiving the signal of failed adjustment returned by the device, the adjustment request is adjusted to the linear growth mode. And then when the bandwidth value of the 4 th round is increased to 5, receiving an adjustment failure signal returned by the equipment, stopping adjustment work and modifying the congestion threshold value to be 5.
In the second case, in the 3 rd round, when the bandwidth value has reached the congestion threshold value but the adjustment failure signal returned by the device has not been received yet, the request is adjusted to the adjustment request in the linear growth mode. And in the 6 th round, receiving an adjustment failure signal returned by the equipment, stopping adjustment work and modifying the congestion threshold value to be 9.
In two cases, after the 9 th round, the bandwidth requirement is reduced, and at this time, it is not necessary to judge whether the optical transport network is unobstructed, and an adjustment request of the linear reduction mode is directly sent, so as to release the equipment resource.
It should be noted that the method of the embodiment of the present application may be executed by a single device, such as a computer or a server. The method of the embodiment can also be applied to a distributed scene and completed by the mutual cooperation of a plurality of devices. In such a distributed scenario, one of the multiple devices may only perform one or more steps of the method of the embodiment, and the multiple devices interact with each other to complete the method.
It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments described above and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Based on the same inventive concept, corresponding to the method of any of the above embodiments, the present application further provides a device for adjusting the bandwidth of the optical service unit connection.
Referring to fig. 4, the apparatus for adjusting the bandwidth of an optical service unit connection in an optical transport network includes:
a determination module 11 configured to: determining whether the optical transport network is clear in response to determining that the bandwidth of the optical service unit connection needs to be increased based on traffic information observed in the optical transport network;
a decision module 12 configured to: in response to the determination module determining that the optical transport network is clear, sending a first request to a plurality of network devices on the optical transport network indicating to increase the bandwidth in a first mode; in response to the determination module determining that the optical transport network is unclogged, sending a second request to the plurality of network devices indicating to increase the bandwidth in a second mode.
For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, the functionality of the various modules may be implemented in the same one or more software and/or hardware implementations as the present application.
The apparatus in the foregoing embodiment is used to implement the method for correspondingly adjusting the bandwidth of the optical service unit connection in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which are not described herein again.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the context of the present application, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of brevity.
In addition, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown in the provided figures for simplicity of illustration and discussion, and so as not to obscure the embodiments of the application. Furthermore, devices may be shown in block diagram form in order to avoid obscuring embodiments of the application, and this also takes into account the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the embodiments of the application are to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the application, it should be apparent to one skilled in the art that the embodiments of the application can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.
While the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic ram (dram)) may use the discussed embodiments.
The present embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present application are intended to be included within the scope of the present application.
Claims (10)
1. A method for adjusting bandwidth of an optical service unit connection, applied to an optical transport network based on the optical service unit, the method comprising:
determining whether the optical transport network is clear in response to determining that the bandwidth needs to be increased based on traffic information observed in the optical transport network;
in response to determining that the optical transport network is clear, sending a first request to a plurality of network devices on the optical transport network indicating to increase the bandwidth in a first mode;
in response to determining that the optical transport network is unclogged, sending a second request to the plurality of network devices indicating to increase the bandwidth in a second mode.
2. The method of claim 1, wherein the first mode comprises an exponential growth mode and the second mode comprises a linear growth mode.
3. The method of claim 2, wherein determining whether the optical transport network is clear comprises:
responsive to determining that the current value of the bandwidth is less than a congestion threshold, determining that the optical transport network is clear;
in response to determining that the current value of the bandwidth is not less than the congestion threshold, determining that the optical transport network is unclogged.
4. The method of claim 3, further comprising:
after receiving first response signals which are returned by the plurality of network devices respectively in response to the first requests and indicate that bandwidth adjustment is successful, determining that the bandwidth adjustment is completed;
after receiving a second response signal indicating that the bandwidth adjustment fails and returned by at least one of the plurality of network devices in response to the first request, resending the second request to the plurality of network devices.
5. The method of claim 3 or 4, further comprising:
after receiving third response signals which are returned by the plurality of network devices respectively in response to the second requests and indicate that the bandwidth adjustment is successful, determining that the bandwidth adjustment is completed;
after receiving a fourth response signal indicating that the bandwidth adjustment fails and returned by at least one of the plurality of network devices in response to the second request, updating the congestion threshold to the current value of the bandwidth, and ending the bandwidth adjustment.
6. The method of claim 2, further comprising:
in response to determining from the traffic information that the bandwidth needs to be reduced, sending a third request to the plurality of network devices indicating that the bandwidth is reduced in a third mode.
7. The method of claim 6, wherein the third mode comprises a linear reduction mode.
8. The method of any of claims 1-4, wherein determining that the bandwidth needs to be increased based on the traffic information comprises:
predicting the bandwidth requirement in the next period according to the flow information;
determining that the bandwidth needs to be increased according to the bandwidth requirement and the current value of the bandwidth.
9. An apparatus for adjusting bandwidth of an optical service unit connection, applied to an optical transport network based on the optical service unit, comprising:
a determination module configured to: determining whether the optical transport network is clear in response to determining that the bandwidth of the optical service unit connection needs to be increased based on traffic information observed in the optical transport network;
a decision module configured to: in response to the determination module determining that the optical transport network is clear, sending a first request to a plurality of network devices on the optical transport network indicating to increase the bandwidth in a first mode; in response to the determination module determining that the optical transport network is unclogged, sending a second request to the plurality of network devices indicating to increase the bandwidth in a second mode.
10. The apparatus of claim 9, wherein the first mode comprises an exponential growth mode and wherein the second mode comprises a linear growth mode.
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