CN108541019A - A kind of the upstream bandwidth control method and system of software definition wireless network - Google Patents
A kind of the upstream bandwidth control method and system of software definition wireless network Download PDFInfo
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- CN108541019A CN108541019A CN201810255268.8A CN201810255268A CN108541019A CN 108541019 A CN108541019 A CN 108541019A CN 201810255268 A CN201810255268 A CN 201810255268A CN 108541019 A CN108541019 A CN 108541019A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/80—Actions related to the user profile or the type of traffic
- H04L47/801—Real time traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/80—Actions related to the user profile or the type of traffic
- H04L47/805—QOS or priority aware
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0284—Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/20—Negotiating bandwidth
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Abstract
The present invention relates to a kind of upstream bandwidth control methods of software definition wireless network and system, this method to include：It is user's bandwidth allocation according to User Priority, and creates corresponding bandwidth control queue；AP in the whole network periodically updates the degree of load of oneself to SDN controllers；The bandwidth control application of the offer service quality operated on SDN controllers periodically checks the degree of load of each AP, and judges that the degree of load of current AP issues different bandwidth control messages to AP from preset threshold values magnitude relationship by SDN controllers；The AP carries out corresponding bandwidth control operation according to the bandwidth control message received to low priority user.The band width control method can effectively cope with the variation that network flow is connected with user, avoid manual operation and bring cumbersome and inefficient, greatly improve the bandwidth control efficiency to hierarchic user, improve service quality and the experience of high-priority users.
Description
Technical field
The present invention relates to software definition enterprise-level radio network technique fields, and in particular to a kind of software definition wireless network
Upstream bandwidth control method and system.
Background technology
Software definition enterprise-level wireless network is by by SDN (Software Defined Network, software definition
Network) framework and traditional forms of enterprises's grade wireless network blend, and it is using the core protocol OpenFlow of SDN that traditional forms of enterprises's grade is wireless
The equipment control plane of network is separated with data transmission face, to realize the flexible control to network flow.
Hierarchic user's bandwidth control is one and is calculated based on HTB (Hierarchical Token Bucket are layered token bucket)
The enterprise-level wireless network application service of method.Hierarchic user's bandwidth control is drawn by carrying out different priority levels to user
Point, different degrees of bandwidth then is carried out to different brackets user and is controlled, to ensure the service of high-priority users data traffic
Quality.Traditional technical method passes through TC (Traffic Control, flow controller) and iptables moulds based on Linux
Block is realized.However, in a network, user's access amount and network flow are real-time changes, and conventional method needs manually adjust
Broadband control strategy copes with the variation of user's access amount and network flow, adjusts that efficiency is low, and reaction speed is slow so that application clothes
The service quality of business substantially reduces.
Invention content
In view of this, it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of software definition wireless networks
Upstream bandwidth control method and system.The band width control method can be negative according to network AP (Access Point, access point)
Load degree carries out low priority user bandwidth control adjustment automatically, to promote service quality and the experience of high-priority users.
In order to achieve the above object, the present invention adopts the following technical scheme that：A kind of upstream bandwidth of software definition wireless network
Control method, including：
Step S1：Network administrator is user's bandwidth allocation according to User Priority, and creates corresponding bandwidth control team
Row；
Step S2：AP in the whole network is periodically to SDN (Software Defined Network, software defined network)
Controller updates the degree of load of oneself；
Step S3：The bandwidth control application for operating in the offer service quality on SDN controllers periodically checks each
The degree of load of AP, and judge whether the degree of load of current AP is more than preset degree of load threshold values, if so, thening follow the steps S4；It is no
Then, step S6 is executed；
Step S4：The bandwidth control application for operating in the offer service quality on SDN controllers is sent strictly to current AP
Bandwidth control message；
Step S5：After current AP receives the message that step S4 is sent, described in the data flow importing by low priority user
In the stringent bandwidth control queue that step S1 is created；
Step S6：The bandwidth control application for operating in the offer service quality on SDN controllers is sent loosely to current AP
Bandwidth control message；
Step S7：After current AP receives the message that step S6 is sent, described in the data flow importing by low priority user
In the loose bandwidth control queue that step S1 is created.
Optionally, the specific processing procedures of step S2 are：
AP in the whole network run based on Click Modular Router LIB (Local Information Base,
Local information library) module；
The LIB modules read the parameter in trawl performance, and combination is currently accessed number of users and calculates current AP's
Degree of load；
Then by periodically sending the form of self-defined message to SDN controllers, the degree of load of oneself is updated.
Optionally, the LIB modules calculate the degree of load of AP according to the progress of following formula：
Wherein, APLoad expressions are the degree of load of current AP；
ChannleLoad expressions are present channel loads；
Nau expressions are to be currently accessed number of users；
ChannleBusyTime and MeasurementDuration is the parameter in current trawl performance respectively.
Optionally, the self-defined message includes 70 bytes；Wherein, the 1st~28 byte is header part；29th~70
Byte is message header part and message data part.
Optionally, the SDN controllers are the SDN controllers based on Floodlight；The band that service quality is provided
Width control application operation is on the SDN controllers；A CIB (Central is also run on the SDN controllers
Information Base, central information repository) module；
The CIB modules can receive the self-defined message that the LIB modules send over, and to the self-defined message into
Row processing, gets the degree of load of each AP；
Degree of load of the bandwidth control application that service quality is provided periodically to each AP of CIB module calls
Information, and determine to execute step S4 or step according to the AP degree of load of acquisition and the magnitude relationship of preset degree of load threshold values
S6。
Optionally, the concrete processing procedure of the step S5 and step S7 is：
The LIB modules operated on AP receive the bandwidth control message that the CIB modules are sent, when the LIB moulds
After block receives message, the corresponding bandwidth that is created the data flow steps for importing S1 of low priority user by OpenFlow
It controls in queue.
Optionally, network administrator can be to the number of queues set in the step S1 and team according to User Priority
Corresponding bandwidth range is arranged to be adjusted.
Optionally, the preset degree of load threshold values is 1.
The present invention also provides a kind of upstream bandwidth control systems of software definition wireless network, including：
The AP being linked into network, and operate in LIB modules and SDN switch on the AP；
Further include：SDN controllers, and the CIB modules operated on the SDN controllers and the band that service quality is provided
Width control application；
Wherein, the SDN switch is used to create the bandwidth control queue of hierarchic user, and real by OpenFlow agreements
Now to the data flow control of hierarchic user；
The LIB modules are used to calculate the degree of load of AP, and by the negative of current AP by way of periodicity sending message
Load degree passes to the CIB modules；The LIB modules are also responsible for receiving the self-defined bandwidth control message that CIB modules are sent；
The CIB modules are used to receive the message of LIB modules transmission, and after handling the message, obtain each AP
Degree of load；
The bandwidth control application for providing service quality can be periodically to the negative of each AP of CIB module calls
Load degree, and difference is issued to the LIB modules by the SDN controllers according to AP degree of load and preset threshold values magnitude relationship
Bandwidth control strategy.
The present invention also provides a kind of non-transitorycomputer readable storage mediums, which is characterized in that when the storage is situated between
When instruction in matter is executed by the processor of client so that client is able to carry out a kind of uplink of software definition wireless network
Band width control method, the method includes：
Step S1：It is user's bandwidth allocation according to User Priority, and creates corresponding bandwidth control queue；
Step S2：AP in the whole network periodically updates the degree of load of oneself to SDN controllers；
Step S3：The bandwidth control application for operating in the offer service quality on SDN controllers periodically checks each
The degree of load of AP, and judge whether the degree of load of current AP is more than preset degree of load threshold values, if so, thening follow the steps S4；It is no
Then, step S6 is executed；
Step S4：The bandwidth control application for operating in the offer service quality on SDN controllers is sent strictly to current AP
Bandwidth control message；
Step S5：After current AP receives the message that step S4 is sent, described in the data flow importing by low priority user
In the stringent bandwidth control queue that step S1 is created；
Step S6：The bandwidth control application for operating in the offer service quality on SDN controllers is sent loosely to current AP
Bandwidth control message；
Step S7：After current AP receives the message that step S6 is sent, described in the data flow importing by low priority user
In the loose bandwidth control queue that step S1 is created.
The present invention uses above technical scheme, the band width control method periodically to be controlled to SDN by the AP in the whole network
Device processed updates the degree of load of oneself；The bandwidth control application periodically inspection of offer service quality on SDN controllers is provided
Look into the degree of load of each AP, and judge the degree of load of current AP and preset threshold values magnitude relationship by the SDN controllers to
AP issues different bandwidth control messages；The AP carries out low priority user according to the bandwidth control message received corresponding
Bandwidth control operation, with ensure high-priority users have higher service quality.The present invention utilizes software defined network frame
The flexibility of structure and programmability, by operating in the message intercommunication of the realization and AP of the CIB modules on SDN controllers, to real
For existing SDN controllers to the adaptive of real-time AP degree of load, which can effectively cope with network flow and user
The variation of connection avoids manual operation and brings cumbersome and inefficient, greatly improves the bandwidth control efficiency to hierarchic user,
Improve service quality and the experience of high-priority users.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the flow diagram for the upstream bandwidth control method that invention software defines wireless network；
Fig. 2 is that invention software defines self-defined message format signal in the upstream bandwidth control method of wireless network
Figure；
Fig. 3 is the structural schematic diagram for the upstream bandwidth control system that invention software defines wireless network；
Fig. 4 is the bandwidth control overall message flow diagram of an embodiment of the present invention；
Fig. 5 is using band width control method of the present invention and not use the method for the present invention respectively to low priority user
The influence comparison of test results figure of handling capacity；
Fig. 6 is the handling capacity using the low priority user and high-priority users of band width control method of the present invention
Change curve；
Fig. 7 is the packet loss in 60s to low priority user using loose bandwidth control and when not using bandwidth to control
Experimental result comparison diagram；
Fig. 8 is the packet loss in 60s to low priority user using stringent bandwidth control and when not using bandwidth to control
Experimental result comparison diagram.
In figure：1、AP；2, LIB modules；3, SDN switch；4, SDN controllers；5, CIB modules；6, service quality is provided
Bandwidth control application.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, technical scheme of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
As shown in Figure 1, the present invention provides a kind of upstream bandwidth control methods of software definition wireless network, including：
Step S1：Network administrator is user's bandwidth allocation according to User Priority, and creates corresponding bandwidth control team
Row；
In specific implementation, network administrator according to User Priority in 3 Open vSwitch of software SDN switch
Bandwidth allocation, and create corresponding bandwidth control queue, two kinds of priority users defined in the present invention, respectively primary user and
Guest User, primary user possess high priority, and corresponding queue does not have bandwidth limitation, can obtain best service quality and body
It tests.Guest User possesses low priority, and corresponding two kinds of queues are respectively：(bandwidth is limited in 5Mbps to stringent bandwidth control queue
It is interior) and loose bandwidth control queue (bandwidth is limited in 10Mbps) bandwidth limitation.
Step S2：AP 1 in the whole network periodically updates the degree of load of oneself to SDN controllers 4；
Specifically processing procedure is：
AP in the whole network runs the LIB modules 2 based on Click Modular Router；
The LIB modules 2 read the parameter in trawl performance, and combination is currently accessed number of users and calculates current AP's
Degree of load；
Then by periodically sending the form of self-defined message to SDN controllers 4, the degree of load of oneself is updated.
Specifically, the degree of load that the LIB modules 2 calculate AP is carried out according to following formula：
Wherein, APLoad expressions are the degree of load of current AP；
ChannleLoad expressions are present channel loads；
Nau expressions are to be currently accessed number of users；
ChannleBusyTime and MeasurementDuration is the parameter in current trawl performance respectively.
As shown in Fig. 2, the self-defined message includes 70 bytes；Wherein, the 1st~28 byte is header part；29th
~70 bytes are message header part and message data part；The message data part is exactly the AP loads indicated with character string forms
Degree.
Step S3：The bandwidth control for operating in the offer service quality on SDN controllers 4 periodically checks often using 6
The degree of load of a AP, and judge whether the degree of load of current AP is more than preset degree of load threshold values, if so, thening follow the steps S4；
Otherwise, step S6 is executed；
Further, the SDN controllers 4 are the SDN controllers 4 based on Floodlight；The offer service quality
Bandwidth control operated on the SDN controllers 4 using 6；A CIB module 5 is also run on the SDN controllers 4；
The CIB modules 5 can receive the self-defined message that the LIB modules 2 send over, and to the self-defined message
It is handled, gets the degree of load of each AP；
The load that the bandwidth control for providing service quality periodically transfers each AP using 6 to the CIB modules 5
Information is spent, and determines to execute step S4 or step according to the AP degree of load of acquisition and the magnitude relationship of preset degree of load threshold values
Rapid S6.
The preset degree of load threshold values is 1, i.e., when only there are one when accessing user, the degree of load of AP does not exceed 1, then
Execute step S6；If degree of load is more than 1, current at least two accessing users are represented, S4 is thened follow the steps.
Step S4：The bandwidth control for operating in the offer service quality on SDN controllers 4 is sent sternly using 6 to current AP
The bandwidth control message of lattice；The content of the message is made of the IP address and stringent bandwidth Control Cooling of current AP；
Step S5：After current AP receives the message that step S4 is sent, described in the data flow importing by low priority user
In the stringent bandwidth control queue that step S1 is created；
It should be noted that the specific processing procedures of step S5 are：
The LIB modules 2 operated on AP receive the stringent bandwidth control message that CIB modules 5 are sent, when the LIB moulds
After block 2 receives the message, the data flow steps for importing S1 of low priority user created by OpenFlow stringent
In bandwidth control queue, to realize that the upstream bandwidth to low priority user controls.
Step S6：The bandwidth control for operating in the offer service quality on SDN controllers 4 sends width using 6 to current AP
The bandwidth control message of pine；The content of the message is made of the IP address and loose bandwidth Control Cooling of current AP；
I.e. current AP only there are one accessing user when, provide service quality bandwidth control using 6 by CIB modules 5 to
AP sends loose bandwidth control message to promote service quality and the experience of low priority user；
Step S7：After current AP receives the message that step S6 is sent, described in the data flow importing by low priority user
In the loose bandwidth control queue that step S1 is created；
It should be added that the concrete processing procedure of step S7 is：
The LIB modules 2 operated on AP receive the loose bandwidth control message that CIB modules 5 are sent, when the LIB moulds
After block 2 receives the message, the data flow steps for importing S1 of low priority user created by OpenFlow loose
In bandwidth control queue, to realize that the upstream bandwidth to low priority user controls.
Optionally, network administrator can be to the number of queues set in the step S1 and team according to User Priority
Corresponding bandwidth range is arranged to be adjusted.
As shown in figure 3, the present invention also provides a kind of upstream bandwidth control systems of software definition wireless network, including：
The AP being linked into network, and operate in LIB modules 2 and SDN switch 3 on the AP；
Further include：SDN controllers 4, and CIB modules 5 and offer service quality on the SDN controllers 4 are provided
Bandwidth control apply 6；
Wherein, the SDN switch 3 is used to create the bandwidth control queue of hierarchic user, and passes through OpenFlow agreements
Realize the data flow control to hierarchic user；
The LIB modules 2 are used to calculate the degree of load of AP, and by the negative of current AP by way of periodicity sending message
Load degree passes to the CIB modules 5；The LIB modules 2 are also responsible for receiving the self-defined bandwidth that CIB modules 5 are sent and controlling disappearing
Breath；
The CIB modules 5 are used to receive the message of the transmission of LIB modules 2, and after handling the message, obtain each
The degree of load of AP；
The bandwidth control for providing service quality periodically can transfer each AP's using 6 to the CIB modules 5
Degree of load, and issued to the LIB modules 2 by the SDN controllers 4 with preset threshold values magnitude relationship according to AP degree of load
Different bandwidth control strategies.
As shown in figure 4, a kind of embodiment as the present invention, Fig. 4 is the bandwidth control overall message flow of the embodiment
Schematic diagram.
By in Fig. 4, it can be seen that there are three users and two AP in the whole network, are UE1, UE2 and UE3 respectively, wherein
It is to belong to access point AP2 that UE1 and UE2, which belongs to access point AP1, UE3,.Three users are connected respectively to respective access point
Afterwards, the LIB modules 2 operated on AP periodically update the degree of load of oneself using self-defined message to SDN controllers 4；It carries
Bandwidth control for service quality periodically inquires each AP's using 6 by operating in CIB modules 5 on SDN controllers 4
Degree of load, and issued to the LIB modules 2 by the SDN controllers 4 with preset threshold values magnitude relationship according to AP degree of load
Bandwidth control strategy.
In Fig. 4, the degree of load of AP1 is 2, is more than threshold values 1, then provides the bandwidth control of service quality and can pass through CIB using 6
Module 5 sends stringent bandwidth control message to AP1, is controlled so that the data flow of low priority user is imported stringent bandwidth
In queue, to ensure service quality and the experience of high-priority users；The degree of load of AP2 is 1, is not more than threshold values 1, then provides
The bandwidth control of service quality can send loose bandwidth control message to AP2 using 6 by CIB modules 5；
After the LIB modules 2 operated on AP1 and AP2 receive bandwidth control message, by OpenFlow agreements to low
The data flow of priority users is controlled, and the data flow of low priority user is imported to stringent bandwidth according to the content of message
(5Mbps) is controlled in queue or loose bandwidth (10Mbps) control queue, to realize tiered band width control.
Fig. 5 be when in network only there are one low priority user when, using band width control method of the present invention and not
The influence comparison of test results figure to low priority user handling capacity respectively using the method for the present invention；Wherein, circular lines indicate
It is using the change curve of low priority user handling capacity when band width control method of the present invention, what box line indicated is not
Using the change curve of low priority user handling capacity when the method for the present invention.
As shown in figure 5, when only there are one when low priority user, if the control of not any bandwidth, it can be seen that low
Priority users can obtain the about handling capacity of 40Mbps.In the case where the bandwidth control for providing service quality is using 6, the present invention
The adaptive degree of load of AP, because only that an accessing user, this method judges to determine to implement the low priority user loose
Bandwidth control.Then it can be seen that since experiment 23 seconds after, the handling capacity of low priority user is effectively controlled
It is being about that 10Mbps terminates until testing.
What Fig. 6 was indicated is when, there are one low priority user and a high-priority users while when accessing, being adopted in network
With the handling capacity change curve of low priority user and high-priority users in band width control method 60s of the present invention；
Wherein, what circular lines indicated is the change curve of low priority user handling capacity, and what box line indicated is that high-priority users gulp down
The change curve for the amount of spitting.
As shown in fig. 6, when there are one low priority users and a high-priority users to access simultaneously, Service Quality is being provided
In the case that the bandwidth applications of amount are started to work not yet, high-priority users are compared, low priority user possesses higher instead
Handling capacity.As the bandwidth applications for providing service quality bring into operation, the adaptive degree of load of AP of the present invention, because have super
More than one accessing user is crossed, in order to preferentially ensure that service quality and the experience of high-priority users, this method judge to determine
Implement stringent bandwidth control to low priority user.Then it can be seen that since experiment 23 seconds after, low priority user
Handling capacity by effective controlled be about 5Mbps until experiment terminates.Opposite, the handling capacity of high priority user is from big
About 10Mbps promotions have arrived 40Mbps until experiment terminates.
Fig. 7 is shown to low priority user using loose bandwidth control and when not using bandwidth to control, in 60s
Packet loss experimental result comparison diagram；Fig. 8, which is shown, to be controlled using stringent bandwidth to low priority user and does not use bandwidth
When control, the packet loss experimental result comparison diagram in 60s.
As shown in fig. 7, when being accessed simultaneously there are one low priority user and a high-priority users, if do not appointed
What bandwidth control strategy, it can be seen that comparison high-priority users, low priority user obtain lower packet loss instead
Rate.Under bandwidth of the present invention control, the adaptive degree of load of AP of inventive algorithm, because have more than more than one
Accessing user, in order to preferentially ensure that service quality and the experience of high-priority users, this method judge to determine to low preferential originally
User implements stringent bandwidth control, but in order to test influence of the loose bandwidth control to packet loss, and algorithm is modified certainly
It is fixed to implement loose bandwidth control to low priority user.Then it can be seen that the packet loss of low priority user increases from about 5%
It is added to 24%.Opposite, the packet loss of high-priority users is reduced to 2% from about 7%.
As shown in figure 8, when being accessed simultaneously there are one low priority user and a high-priority users, if do not appointed
What bandwidth control strategy, it can be seen that comparison high-priority users, low priority user obtain lower packet loss instead
Rate.Under bandwidth of the present invention control, the adaptive degree of load of AP of inventive algorithm, because have more than more than one
Accessing user, in order to preferentially ensure that service quality and the experience of high-priority users, this method judge to determine to use low priority
Implement stringent bandwidth control in family.Then it can be seen that the packet loss of low priority user increases 54% from about 5%, height
The packet loss of priority users is reduced to 1% from about 7%.
In conjunction with the experimental result of Fig. 7 and Fig. 8, in order to ensure that the service quality of high-priority users, this method finally use
When being accessed simultaneously there are one low priority user and a high-priority users, implement stringent bandwidth to low priority user
Control.
Band width control method provided by the present invention can adaptive AP degree of load, by being carried out not to low priority user
Bandwidth with degree controls, effective to promote the handling capacity of high-priority users, while reducing the packet loss of high-priority users.
The present invention also provides a kind of non-transitorycomputer readable storage mediums, which is characterized in that when the storage is situated between
When instruction in matter is executed by the processor of client so that client is able to carry out a kind of uplink of software definition wireless network
Band width control method, the method includes：
Step S1：It is user's bandwidth allocation according to User Priority, and creates corresponding bandwidth control queue；
Step S2：AP in the whole network periodically updates the degree of load of oneself to SDN controllers 4；
Step S3：The bandwidth control for operating in the offer service quality on SDN controllers 4 periodically checks often using 6
The degree of load of a AP, and judge whether the degree of load of current AP is more than preset degree of load threshold values, if so, thening follow the steps S4；
Otherwise, step S6 is executed；
Step S4：The bandwidth control for operating in the offer service quality on SDN controllers 4 is sent sternly using 6 to current AP
The bandwidth control message of lattice；
Step S5：After current AP receives the message that step S4 is sent, described in the data flow importing by low priority user
In the stringent bandwidth control queue that step S1 is created；
Step S6：The bandwidth control for operating in the offer service quality on SDN controllers 4 sends width using 6 to current AP
The bandwidth control message of pine；
Step S7：After current AP receives the message that step S6 is sent, described in the data flow importing by low priority user
In the loose bandwidth control queue that step S1 is created.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of upstream bandwidth control method of software definition wireless network, which is characterized in that including：
Step S1：Network administrator is user's bandwidth allocation according to User Priority, and creates corresponding bandwidth control queue；
Step S2：AP in the whole network periodically updates the degree of load of oneself to SDN controllers；
Step S3：The bandwidth control application of the offer service quality operated on SDN controllers periodically checks each AP's
Degree of load, and judge whether the degree of load of current AP is more than preset degree of load threshold values, if so, thening follow the steps S4；Otherwise, it holds
Row step S6；
Step S4：The bandwidth control application of the offer service quality operated on SDN controllers sends stringent band to current AP
Wide control message；
Step S5：After current AP receives the message that step S4 is sent, the data flow of low priority user is imported into the step
In the stringent bandwidth control queue that S1 is created；
Step S6：The bandwidth control application of the offer service quality operated on SDN controllers sends loose band to current AP
Wide control message；
Step S7：After current AP receives the message that step S6 is sent, the data flow of low priority user is imported into the step
In the loose bandwidth control queue that S1 is created.
2. band width control method according to claim 1, which is characterized in that the specific processing procedures of step S2 are：
AP in the whole network runs the LIB modules based on Click Modular Router；
The LIB modules read the parameter in trawl performance, and combine and be currently accessed the load that number of users calculates current AP
Degree；
Then by periodically sending the form of self-defined message to SDN controllers, the degree of load of oneself is updated.
3. band width control method according to claim 2, which is characterized in that the degree of load that the LIB modules calculate AP is pressed
It is carried out according to following formula：
Wherein, APLoad expressions are the degree of load of current AP；
ChannleLoad expressions are present channel loads；
NauExpression is to be currently accessed number of users；
ChannleBusyTime and MeasurementDuration is the parameter in current trawl performance respectively.
4. band width control method according to claim 2, which is characterized in that the self-defined message includes 70 bytes；
Wherein, the 1st~28 byte is header part；29th~70 byte is message header part and message data part.
5. band width control method according to claim 2, which is characterized in that the SDN controllers be based on
The SDN controllers of Floodlight；The bandwidth for providing service quality controls application operation on the SDN controllers；
A CIB module is also run on the SDN controllers；
The CIB modules can receive the self-defined message that the LIB modules send over, and to the self-defined message at
Reason, gets the degree of load of each AP；
The bandwidth control application for providing service quality is periodically believed to the degree of load of each AP of CIB module calls
Breath, and determine to execute step S4 or step according to the AP degree of load of acquisition and the magnitude relationship of preset degree of load threshold values
S6。
6. band width control method according to claim 5, which is characterized in that the specific processing of the step S5 and step S7
Process is：
The LIB modules operated on AP receive the bandwidth control message that the CIB modules are sent, when the LIB modules connect
After receiving message, the data flow steps for importing S1 of the low priority user corresponding bandwidth created is controlled by OpenFlow
In queue.
7. band width control method according to any one of claims 1 to 6, which is characterized in that network administrator is according to user
Priority can be adjusted the number of queues and the corresponding bandwidth range of queue set in the step S1.
8. band width control method according to any one of claims 1 to 6, which is characterized in that the preset load bottom valve
Value is 1.
9. a kind of upstream bandwidth control system of software definition wireless network, which is characterized in that including：
The AP being linked into network, and operate in LIB modules and SDN switch on the AP；
Further include：SDN controllers, and the CIB modules operated on the SDN controllers and the bandwidth control that service quality is provided
System application；
Wherein, the SDN switch is used to create the bandwidth control queue of hierarchic user, and passes through OpenFlow protocol realizations pair
The data flow control of hierarchic user；
The LIB modules are used to calculate the degree of load of AP, and by the degree of load of current AP by way of periodicity sending message
Pass to the CIB modules；The LIB modules are also responsible for receiving the self-defined bandwidth control message that CIB modules are sent；
The CIB modules are used to receive the message of LIB modules transmission, and after handling the message, obtain the negative of each AP
Load degree；
The bandwidth for providing service quality controls the load that application can periodically to each AP of CIB module calls
Degree, and issued to the LIB modules by the SDN controllers from preset threshold values magnitude relationship according to AP degree of load different
Bandwidth control strategy.
10. a kind of non-transitorycomputer readable storage medium, which is characterized in that when the instruction in the storage medium is by client
When the processor at end executes so that client is able to carry out a kind of upstream bandwidth control method of software definition wireless network, institute
The method of stating includes：
Step S1：It is user's bandwidth allocation according to User Priority, and creates corresponding bandwidth control queue；
Step S2：AP in the whole network periodically updates the degree of load of oneself to SDN controllers；
Step S3：The bandwidth control application of the offer service quality operated on SDN controllers periodically checks each AP's
Degree of load, and judge whether the degree of load of current AP is more than preset degree of load threshold values, if so, thening follow the steps S4；Otherwise, it holds
Row step S6；
Step S4：The bandwidth control application of the offer service quality operated on SDN controllers sends stringent band to current AP
Wide control message；
Step S5：After current AP receives the message that step S4 is sent, the data flow of low priority user is imported into the step
In the stringent bandwidth control queue that S1 is created；
Step S6：The bandwidth control application of the offer service quality operated on SDN controllers sends loose band to current AP
Wide control message；
Step S7：After current AP receives the message that step S6 is sent, the data flow of low priority user is imported into the step
In the loose bandwidth control queue that S1 is created.
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