CN106330753A - Stream processing method and device - Google Patents
Stream processing method and device Download PDFInfo
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- CN106330753A CN106330753A CN201510366414.0A CN201510366414A CN106330753A CN 106330753 A CN106330753 A CN 106330753A CN 201510366414 A CN201510366414 A CN 201510366414A CN 106330753 A CN106330753 A CN 106330753A
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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
- H04L47/10—Flow control; Congestion control
- H04L47/20—Traffic policing
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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
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2441—Traffic characterised by specific attributes, e.g. priority or QoS relying on flow classification, e.g. using integrated services [IntServ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/20—Support for services
- H04L49/201—Multicast operation; Broadcast operation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/20—Support for services
- H04L49/205—Quality of Service based
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- Computer Networks & Wireless Communication (AREA)
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- Quality & Reliability (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention provides a stream processing method and device. The method comprises the following steps: receiving configuration for types of meter bands in an OpenFlow protocol meter, wherein the types include enqueue applications for indicating ports into which streams of corresponding rates are about to be added and queues of the ports; and processing streams of the meter bands according to the types of the meter bands. Through adoption of the stream processing method and device, the problem of incapability of ensuring service quality of a multicast service in the prior art is solved, and the service quality of the multicast service is ensured.
Description
Technical field
The present invention relates to the communications field, in particular to the metering band class of a kind of method for stream processing, device and extension
Type.
Background technology
OpenFlow is a kind of switching technology.OpenFlow v1.3 version adds gauge table (Meter Table).Its
In, a gauge table comprises some metering list items, and a list item defines a quantifier.Each quantifier can make
OpenFlow realizes some simple service quality (Quality of Service, referred to as QoS) business, and permissible
More complicated QoS is realized in conjunction with each port queue.
Stream compression can be entered to being numbered at the quantifier of meter_id by stream table by command M eter meter_id
Reason.
Each metering list item may have one or more metering band (Meter Band), and each metering band configures corresponding speed
The mode processed with specifying data.The speed of the data stream being assigned to it measured by each quantifier, then according to measurement
Speed, chooses a highest metering band of configured rate, to data in configured rate is less than the metering band of this measuring rate
Stream processes.If the metering tape speed of any configuration of ratio of current measuring rate is the lowest, then quantifier is just without appointing
What operation.
At present, metering band only measures belt type with two kinds optional (optional): abandon (drop) and differential service generation
Code-point heavy label (Differentiated Services Code Point remark, referred to as DSCP remark).Wherein,
Drop type, by packet discard, can be used to define bandwidth rates and limits;DSCP remark type can reduce data
The priority that dscp field in Internet Protocol (IP) head of bag abandons, can be used for defining a simple difference plan
Slightly.
Meanwhile, OpenFlow switch ports themselves can arrange queue.One forwards port can arrange multiple queue, often
Individual queue can configure maximum rate (max_rate), minimum-rate (min_rate) etc., can pass through OF-Config
Configure.Wherein, OF-Config is an aided protocol of OpenFlow, is used for configuring and manage network and sets
Standby resource.In OpenFlow v1.3, the instruction of stream table can add in behavior aggregate that to arrange queue (Set-queue) dynamic
Make, i.e. forward data to specified queue (queue_id), in OpenFlow v1.0, then by enqueue (enqueue)
Action, forwards data to the specified queue (queue_id) of designated port (port).
Research process finds, along with network technology and the high speed development of multimedia technology, audio/video meeting, video point
Broadcast, multiplayer, the application based on multicast such as collaborative work and remote teaching constantly occur, need the service quality of multicast
Ask more and more stronger.But, a multicast application may be simultaneously present the content stream of various ways, such as video, sound
Frequently, text etc., the data volume size of different content stream, to differences such as the requirements of data integrity.
The problem that cannot ensure the service quality of multicast service for correlation technique, the most not yet proposes effective solution.
Summary of the invention
The invention provides the metering belt type of a kind of method for stream processing, device and extension, at least to solve correlation technique
The problem that cannot ensure the service quality of multicast service.
According to an aspect of the invention, it is provided a kind of method for stream processing, including: receive OpenFlow agreement meter
Measuring the configuration of the type of band in measuring device, wherein, described type includes: enqueue application, and described enqueue application is used for
The port that should add of stream of instruction corresponding speed and the queue of described port;According to the type of described metering band, to passing through
The stream stating metering band processes.
Preferably, described enqueue application at least includes: the port corresponding to configured rate of the configured rate of stream and stream,
The queue of the port corresponding with the configured rate of stream.
Preferably, described type also includes at least one of: abandon, differentiated services code points DSCP heavy label.
Preferably, in the type according to the plurality of metering band, before being processed by the stream of described metering band, institute
Method of stating also includes: receiving the configuration of convection current table, wherein, being configured to indicate that of described stream table has corresponding DSCP value
The quantifier that should add of stream;According to the configuration of described stream table, the described stream with default DSCP value is added described meter
In measuring device, wherein, the described stream of described default DSCP value is configured to add described meter in the configuration of described stream table
Measuring device.
Preferably, the described default DSCP value of described stream is for indicating the content of described stream, and wherein, described content is at least
Including: video, audio frequency, text.
Preferably, in the case of described default DSCP value indicates the content of described stream to be video, according to described metering band
Type, carry out process include by the stream of described metering band: the stream will in described stream with first rate adds first
Metering band, and according to the type of described first metering band, process by the stream of described first metering band;By described
The stream in stream with the second speed adds the second metering band, and according to the type of described second metering band, to by described the
The stream of two metering bands processes.
Preferably, according to the type of described first metering band, include carrying out process by the stream of described first metering band:
In the case of the type of described first metering band is enqueue application, the stream with described first rate is added the first end
The first queue of mouth.
Preferably, according to the type of described second metering band, include carrying out process by the stream of described second metering band:
In the case of the type of described second metering band is enqueue application, the stream with described second speed is added the second end
Second queue of mouth;Described second metering band type for abandoning in the case of, the stream with described second speed is lost
Abandon;Wherein, described first rate is less than described second speed.
Preferably, in the case of described default DSCP value indicates the content of described stream to be audio frequency, according to described metering band
Type, carry out process include by the stream of described metering band: the stream in described stream with third speed is added described
3rd metering band;In the case of the type of described 3rd metering band is enqueue application, will there is described third speed
Stream adds the 3rd queue of the 3rd port.
Preferably, in the case of described default DSCP value indicates the content of described stream to be text, according to described metering band
Type, carry out process include by the stream of described metering band: the stream in described stream with fourth rate is added described
4th metering band;In the case of the type of described 4th metering band is enqueue application, will there is described fourth rate
Stream adds the 4th queue of the 4th port.
According to another aspect of the present invention, additionally provide a kind of current processing device, including: the first configuration module, it is used for
Receiving the configuration to the type measuring band in OpenFlow agreement quantifier, wherein, described type includes: enqueue Shen
Please, described enqueue application is used for port and the queue of described port indicating the stream of corresponding speed to add;First processes
Module, for the type according to described metering band, processes by the stream of described metering band.
Preferably, described enqueue application at least includes: the port corresponding to configured rate of the configured rate of stream and stream,
The queue of the port corresponding with the configured rate of stream.
Preferably, described type also includes at least one of: abandon, differentiated services code points DSCP heavy label.
Preferably, described device also includes: the second configuration module, for receiving the configuration of convection current table, wherein, described stream
Being configured to indicate that of table has the quantifier that the stream of corresponding DSCP value should add;Second processing module, for according to institute
State the configuration of stream table, the described stream with default DSCP value is added in described quantifier, wherein, described default DSCP
The described stream of value is configured to add described quantifier in the configuration of described stream table.
Preferably, the described default DSCP value of described stream is for indicating the content of described stream, and wherein, described content is at least
Including: video, audio frequency, text.
Preferably, described first processing module includes: the first processing unit, for indicating institute in described default DSCP value
Stating in the case of the content of stream is video, the stream will in described stream with first rate adds the first metering band, and according to institute
State the type of the first metering band, process by the stream of described first metering band;Second processing unit, in institute
State default DSCP value indicate described stream content be video in the case of, will described stream have the second speed stream add
Second metering band, and according to the type of described second metering band, process by the stream of described second metering band.
Preferably, described first processing unit, in the case of being enqueue application in the type of described first metering band,
The stream with described first rate is added the first queue of the first port.
Preferably, described second processing unit, in the case of being enqueue application in the type of described second metering band,
The stream with described second speed is added the second queue of the second port;And measure the type of band for losing described second
In the case of abandoning, being abandoned by the stream with described second speed, wherein, described first rate is less than described second speed.
Preferably, described first processing module also includes: the 3rd processing unit, for indicating in described default DSCP value
In the case of the content of described stream is audio frequency, the stream in described stream with third speed is added described 3rd metering band;?
In the case of the type of described 3rd metering band is enqueue application, the stream with described third speed is added the 3rd port
The 3rd queue.
Preferably, described first processing module also includes: fourth processing unit, for indicating in described default DSCP value
In the case of the content of described stream is text, the stream in described stream with fourth rate is added described 4th metering band;?
In the case of the type of described 4th metering band is enqueue application, the stream with described fourth rate is added the 4th port
The 4th queue.
According to another aspect of the present invention, additionally providing the metering belt type of a kind of extension, described metering belt type includes
Following parameters: configured rate (rate), enqueue action number (enqueue_number), port numbers (port) and team
Row number (queue_id);Wherein, described metering belt type is for indicating metering band, according to the speed of stream, data are proceeded to one
Or the respective queue of multiple port.
By the present invention, use the configuration received the type measuring band in OpenFlow agreement quantifier, wherein, class
Type includes: enqueue application, and enqueue application is used for port and the queue of port indicating the stream of corresponding speed to add;
According to the type of metering band, by the way of the stream carried by metering is processed, solve correlation technique and cannot ensure multicast
The problem of the service quality of business, has ensured the service quality of multicast service.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, the present invention
Schematic description and description be used for explaining the present invention, be not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of method for stream processing according to embodiments of the present invention;
Fig. 2 is the structured flowchart of current processing device according to embodiments of the present invention;
Fig. 3 is the preferred structure schematic diagram of current processing device according to embodiments of the present invention;
Fig. 4 is that OpenFlow implements Multicast QoS system framework figure according to the preferred embodiment of the invention;
Fig. 5 is easy according to the preferred embodiment of the invention OpenFlow multicast network topology schematic diagram;
Fig. 6 is that QoS ensures the flow chart implemented according to the preferred embodiment of the invention.
Detailed description of the invention
Below with reference to accompanying drawing and describe the present invention in detail in conjunction with the embodiments.It should be noted that in the feelings do not conflicted
Under condition, the embodiment in the application and the feature in embodiment can be mutually combined.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, " second "
Etc. being for distinguishing similar object, without being used for describing specific order or precedence.
Embodiments providing the metering belt type of a kind of extension, metering belt type includes following parameters: configured rate
Rate, enqueue action number enqueue_number, port numbers port and queue number queue_id;The metering of this extension
Data are proceeded to the respective queue of one or more port for indicating metering band by belt type according to the speed of stream.
The present embodiment additionally provides a kind of method for stream processing, and Fig. 1 is the flow process of method for stream processing according to embodiments of the present invention
Figure, as it is shown in figure 1, this flow process comprises the steps:
Step S102, receives the configuration to the type measuring band in OpenFlow agreement quantifier, and wherein, type includes:
Enqueue application, enqueue application is used for port and the queue of port indicating the stream of corresponding speed to add;
Step S104, according to the type of metering band, is processed the stream carried by metering.
By above-mentioned steps, in metering band, use enqueue applying type so that metering band can will be carried by this metering
Stream according to speed forward flow to correspondence port and the queue of port so that the stream of different rates can realize respectively
Each qos requirement of demand.So, for multicast service enters the stream of the different rates of identical quantifier can be real
The qos requirement of existing differentiation;Cannot be further according to the speed of the stream stream to being carried by metering relative in correlation technique
Processing the mode of (can only carry out drop or DSCP remark), by above-mentioned steps, solving correlation technique cannot
The problem ensureing the service quality of multicast service, has ensured the service quality of multicast service.
Preferably, in enqueue application, the project of configuration at least includes: the configured rate of stream is corresponding with the configured rate of stream
The queue of port and the port corresponding to configured rate of stream.Such as, for a quantifier, can there is one
Or multiple metering band, measure band be configured to join the team applying type time, need configuration stream configured rate and stream
The queue of the port that port corresponding to configured rate is corresponding with the configured rate of stream.So that the stream of corresponding speed is permissible
Respectively enter and measure band accordingly, and then add process in the queue of corresponding port.The queue of these ports can configure
There is minimum speed limit, it is also possible to be configured with flank speed.Such as 0~the stream of 100kbps, entrance minimum speed limit is 100kbps
Queue can ensure its QoS.Although additionally, the stream of 0~100kbps, entering minimum speed limit is the queue of 500kbps
Its QoS can also be ensured, but be likely to result in the waste of resource, and take the queue of higher speed.Therefore, stream is in basis
When speed sends into metering tape handling, the minimal configuration speed entering the rate requirement that disclosure satisfy that this stream in configured rate is corresponding
Metering tape handling.
Preferably, the type of metering band can also include at least one of: dorp, DSCP remark.I.e. in application
During said method, quantifier measures band and can be combined with the QoS guarantee that dorp, DSCP remark type realizes flowing.
Preferably, in multicast service, comprise video, audio frequency, content of text;And the stream of these contents has respective
Feature.Such as, video stream rate is relatively big, and the excursion of speed is the biggest;In order to the stream of different content is carried out differentiation
QoS ensure, in embodiments of the present invention by multicast source encapsulation stream time, the DSCP value convection current made a basket by IP
Content be marked.So, stream can enter difference according to the difference (namely difference of the content of stream) of DSCP value
Quantifier, and then by the metering tape handling in different quantifiers.Such as, the configuration of convection current table, wherein, stream are received
Being configured to indicate that of table has the quantifier that the stream of corresponding DSCP value should add;According to the configuration of stream table, will have pre-
If the stream of DSCP value adds in quantifier, wherein, the stream presetting DSCP value is configured to add in the configuration of stream table
Enter quantifier.
Preferably, the default DSCP value of above-mentioned stream is for indicating the content of stream, and wherein, content at least includes: video,
Audio frequency, text.It is not limited to above-mentioned three kinds of contents in embodiments of the present invention;Content at stream causes the speed of stream, stream
The change of speed present certain feature in the case of, the DSCP value of correspondence can be used to be marked, and then entrance be not
Same stream table carries out the process of differentiation.
Preferably, in the case of the content of default DSCP value instruction stream is video, according to the type of metering band, to logical
The stream crossing metering band carries out process and includes: the stream will in stream with first rate adds the first metering band, and according to the first meter
The type of amount band, processes by the stream of the first metering band;The stream in stream with the second speed is added the second metering
Band, and according to the type of the second metering band, process by the stream of the second metering band.
Preferably, according to the type of the first metering band, include carrying out process by the stream of the first metering band: at the first meter
In the case of the type of amount band is enqueue application, the stream with first rate is added the first queue of the first port.
Preferably, according to the type of the second metering band, include carrying out process by the stream of the second metering band: at the second meter
In the case of the type of amount band is enqueue application, the stream with the second speed is added the second queue of the second port;?
In the case of the type of the second metering band is for abandoning, the stream with the second speed is abandoned;Wherein, first rate is less than the
Two speed.The metering band of type is abandoned, it is possible to achieve the speed limit of video flowing by combination.
Preferably, in the case of the content of default DSCP value instruction stream is audio frequency, according to the type of metering band, to logical
The stream crossing metering band carries out process and includes: the stream will in stream with third speed adds the 3rd metering band;At the 3rd metering band
Type be enqueue application in the case of, will have third speed stream add the 3rd port the 3rd queue.
Preferably, in the case of the content of default DSCP value instruction stream is text, according to the type of metering band, to logical
The stream crossing metering band carries out process and includes: the stream will in stream with fourth rate adds the 4th metering band;At the 4th metering band
Type be enqueue application in the case of, will have fourth rate stream add the 4th port the 4th queue.
Through the above description of the embodiments, those skilled in the art is it can be understood that arrive according to above-described embodiment
Method can add the mode of required general hardware platform by software and realize, naturally it is also possible to by hardware, but a lot
In the case of the former is more preferably embodiment.Based on such understanding, technical scheme is the most in other words to existing
The part having technology to contribute can embody with the form of software product, and this computer software product is stored in one
In storage medium (such as ROM/RAM, magnetic disc, CD), including some instructions with so that a station terminal equipment (can
To be mobile phone, computer, server, or the network equipment etc.) perform the method described in each embodiment of the present invention.
Additionally providing a kind of current processing device in the present embodiment, this device is used for realizing above-described embodiment and the side of being preferable to carry out
Formula, had carried out repeating no more of explanation.As used below, term " module " can realize the soft of predetermined function
Part and/or the combination of hardware.Although the device described by following example preferably realizes with software, but hardware,
Or the realization of the combination of software and hardware also may and be contemplated.
Fig. 2 is the structured flowchart of current processing device according to embodiments of the present invention, as in figure 2 it is shown, this device includes: the
One configuration module 22 and the first processing module 24, wherein, the first configuration module 22, for receiving, OpenFlow is assisted
Measuring the configuration of the type of band in view quantifier, type includes: enqueue application, and enqueue application is used for indicating corresponding speed
Port that the stream of rate should add and the queue of port;First processing module 24, coupled to the first configuration module 22, is used for
According to the type of metering band, the stream carried by metering is processed.
By the comprehensive function of above-mentioned module, solve the problem that correlation technique cannot ensure the service quality of multicast service,
Ensure the service quality of multicast service.
Preferably, enqueue application at least includes: the port corresponding to configured rate of the configured rate of stream and stream and stream
The queue of port corresponding to configured rate.
Preferably, type also includes at least one of: abandon, differentiated services code points heavy label.
Fig. 3 is the preferred structure schematic diagram of current processing device according to embodiments of the present invention, as shown in Figure 3, it is preferable that
Device also includes: the second configuration module 32, for receiving the configuration of convection current table, wherein, stream table be configured to indicate that tool
There is the quantifier that the stream of corresponding DSCP value should add;Second processing module 34, coupled to the second configuration module 32, uses
In the configuration according to stream table, the stream with default DSCP value is added in quantifier, wherein, preset the stream of DSCP value
The configuration of stream table is configured to add quantifier.
Preferably, the default DSCP value of stream is for indicating the content of stream, and wherein, content at least includes: video, audio frequency,
Text.
Preferably, the first processing module 24 includes: the first processing unit 241, at default DSCP value instruction stream
In the case of content is video, the stream in stream with first rate is added the first metering band, and according to the first metering band
Type, processes by the stream of the first metering band;Second processing unit 242, for indicating in default DSCP value
In the case of the content of stream is video, the stream in stream with the second speed is added the second metering band, and according to the second metering
The type of band, processes by the stream of the second metering band.
Preferably, the first processing unit 241, in the case of being enqueue application in the type of the first metering band, will
The stream with first rate adds the first queue of the first port.
Preferably, the second processing unit 242, in the case of being enqueue application in the type of the second metering band, will
The stream with the second speed adds the second queue of the second port;And second metering band type for abandoning in the case of,
Being abandoned by the stream with the second speed, wherein, first rate is less than the second speed.
Preferably, the first processing module 24 also includes: the 3rd processing unit 243, at default DSCP value instruction stream
Content be audio frequency in the case of, will stream in have third speed stream add the 3rd metering band;Class at the 3rd metering band
In the case of type is enqueue application, the stream with third speed is added the 3rd queue of the 3rd port.
Preferably, the first processing module 24 also includes: fourth processing unit 244, at default DSCP value instruction stream
Content be text in the case of, will stream in have fourth rate stream add the 4th metering band;Class at the 4th metering band
In the case of type is enqueue application, the stream with fourth rate is added the 4th queue of the 4th port.
It should be noted that above-mentioned modules can be by software or hardware realizes, for the latter, Ke Yitong
Cross in the following manner to realize, but be not limited to this: above-mentioned module is respectively positioned in same processor;Or, above-mentioned module position respectively
In multiple processors.
Embodiments of the invention additionally provide a kind of software, and this software is used for performing in above-described embodiment and preferred implementation
The technical scheme described.
Embodiments of the invention additionally provide a kind of storage medium.In the present embodiment, above-mentioned storage medium can be set
For storage for performing the program code of following steps:
Step S1, receives the configuration to the type measuring band in OpenFlow agreement quantifier, and wherein, type includes:
Enqueue application, enqueue application is used for port and the queue of port indicating the stream of corresponding speed to add;
Step S2, according to the type of metering band, is processed the stream carried by metering.
Alternatively, in the present embodiment, above-mentioned storage medium can include but not limited to: USB flash disk, read only memory
(Random Access Memory is called for short for (Read-Only Memory, referred to as ROM), random access memory
For RAM), portable hard drive, the various media that can store program code such as magnetic disc or CD.
Alternatively, the concrete example in the present embodiment is referred to showing described in above-described embodiment and optional embodiment
Example, the present embodiment does not repeats them here.
In order to the description making the embodiment of the present invention is clearer, it is described below in conjunction with preferred embodiment and illustrates.
The preferred embodiment of the present invention provides a kind of multicast data flow diffserv mechanism based on OpenFlow quantifier, relates to
OpenFlow quantifier and port queue is utilized to realize multicast data flow diffserv mechanism.
In the preferred embodiment, use Differentiated Services model (Diff-Serv) that the different content of multicast is carried out QoS
Ensure.Differential service typically arranges different DSCP values to distinguish different content stream in the tos field in IP packet header,
Then various flows is performed different service strategies.The appearance of OpenFlow network adds the motility to network management
And extensibility, therefore use OpenFlow that content stream is carried out identification and there is considerable flexibility, switch is carried out
Resource policy configuration has the most managerial, contributes to realizing more complicated careful differential service.
In order to provide a kind of Multicast QoS mechanism to ensure the bandwidth of multicast, improving resource utilization, the present invention is excellent simultaneously
Select embodiment that the gauge table of existing OpenFlow agreement is extended, increase one metering belt type (Band Type):
Enqueue application (enqueue apply), the type metering band performs one or more enqueue actions.Utilize the type
The quantifier that metering band is set up can allow the stream of different rates enter the different queue of multicast port.
Preferably, in order to realize Multicast QoS guarantee in OpenFlow network, the preferred embodiment of the present invention exists
Multicast management module and QoS assurance module is devised on OpenFlow controller.
Preferably, the task of multicast management module includes: multicast group member management, multicast tree are set up and under switch
Send out multicast identification stream table corresponding, provide the multicast of each switch to produce port letter according to multicast tree structure to QoS module
Breath.
Preferably, QoS assurance module is responsible for: sets up content recognition stream table and corresponding gauge table, passes through OF-Config
Configure corresponding port queue.Different content stream is distinguished by different DSCP values in content recognition stream table.?
Gauge table is set up multiple quantifier and ensures to realize different QoS.Feature according to different content stream is to different content
Implement different QoS strategy.
Wherein, in order to ensure the facile transport of video flowing, audio stream, text flow, the preferred embodiment of the present invention is built respectively
Vertical corresponding quantifier and port queue ensure bandwidth.
Preferably, video stream transmission velocity is big, and speed changes greatly simultaneously, therefore can be divided into multiple by the speed of video flowing
Grade, then has the port queue of minimum-rate to the configuration of each grade at each multicast forwarding port accordingly,
The quantifier of the rear foundation metering band containing multiple enqueue apply types, sends out respectively by the video flowing of the stage speed such as each
Deliver to each self-corresponding queue of multicast port, ensure its facile transport.The stream of low speed so can be avoided to occupy high bandwidth
Resource, can save the bandwidth of network.Meanwhile, in order to prevent video flowing from taking the too many network bandwidth, it is also possible at meter
In measuring device, the metering of one drop type of increase brings and video flowing is carried out speed limit.
Preferably, audio stream, text flow transfer rate relatively small, change the least, therefore can not carry out speed
Classification, they all stage speeds such as only one of which, only need each multicast port of each leisure to set up one and there is minimum-rate
Queue.Set up the quantifier of the metering band containing only an enqueue apply type respectively then to both content stream,
Both stream is separately sent to multicast port each corresponding queue to ensure facile transport.
Visible, the preferred embodiment of the present invention extends the gauge table of OpenFlow agreement, adds new metering belt type
Enqueue apply, the quantifier utilizing the type metering band to set up can make data stream enter difference according to different speed
Queue.Correspondingly, the preferred embodiment of the present invention devises multicast management on OpenFlow controller and QoS ensures
Two modules, the QoS being each responsible for data multicast and each content ensures.Finally, metering band and the end of extension are utilized
Mouth queue implements finer differential service to each content stream, can reduce the network bandwidth while ensureing facile transport
Expense.
Below in conjunction with the accompanying drawings the preferred embodiment of the present invention it is described and illustrates.
The present invention, in the stream differential service in order to realize multicast, has first expanded existing OpenFlow metering band, has increased
New metering belt type enqueue apply.Then on OpenFlow controller, devise multicast management and multicast
Two modules of QoS, the QoS being each responsible for data multicast and each content ensures.Enqueue apply is finally utilized to count
Amount band is respectively the corresponding quantifier of each content design, realizes careful multicast data flow differential service.
The most only to realize the stream differential service of the video of multicast, audio frequency, text under a simple network topology environment
As a example by this method is illustrated, in reality, network topology may more complicated and data division of teaching contents may be according to specifically
Situation changes, but, these different application scenarios all can be used in the preferred embodiment of the present invention.
Preferred embodiment one:
The structure of metering band enqueue apply type newly-increased in the preferred embodiment of the present invention is as follows:
struct ofp_meter_band_enqueue_apply{
uint16_t type;/ * metering belt type */
uint16_t len;The byte length .* of this metering band of/*/
uint32_t rate;Configured rate * of this metering band of/*/
Total number * of uint8_t enqueue_number/* queue/
Struct enqueue_parameter*list/* queue parameter */
uint8_t pad[32];
};
Wherein
struct enqueue_parameter{
uint32_t port;/ * port numbers */
uint32_t queue_id;/ * queue id*/
}
Above-mentioned metering band enqueue apply type defined in the preferred embodiment of the present invention is a kind of " optional
(optional) " type.The type metering band performs one or more enqueue actions, and the parameter of this metering band includes
Corresponding configured rate (rate), enqueue action number (enqueue_number), port numbers (port) and queue
Number (queue_id).Data can be proceeded to the respective queue of one or more port by this metering band according to flow velocity rate.This meter
The execution false code of amount band is as follows:
/*****************
Function name: enqueue_apply
Input parameter: the example enqueue_apply_band of ofp_meter_band_enqueue_apply structure, treats
The data stream pkt processed.
Output parameter: void
Realize function: perform the operation of metering band enqueue_apply_band, by the execution enqueue of data stream pkt
Operation.From enqueue_apply_band, i.e. first extract number N adding enqueue action, the most successively by N
Individual queue parameter pair, is created as the standard ofp_enqueue_action structure example of enqueue action, then uses
Apply-actions directly performs this N number of enqueue action, transmits data to the respective queue of corresponding port.
During it should be noted that utilize this metering band, can not have output action when multilevel flow table designs, avoiding and
Enqueue action causes and repeats to send, and everything uses and uses Apply-actions instruction simultaneously, rather than
Write-actions instructs, and so can ensure that the execution of relevant action is before data stream brings enqueue into by this metering
Complete.
Utilize this extension metering band can design one allow different rates stream enter different port queue quantifier.Give
The enqueue apply type metering band with different configured rate rate arranges different queue_id parameter, then can be real
The different queue being now adjusted in multicast port by stream according to different rates, is beneficial to realize Multicast QoS guarantee below.
Table 1 below is the quantifier 1 utilizing enqueue apply metering band to set up:
Table 1
Data stream is through the process of this quantifier: when the flow velocity rate carried by this metering is at 0~b kbps, will enter p1End
The queue q of mouth11And p2The queue q of port21;When flow velocity rate is more than b kbps, p will be entered1The queue q of port12And p2
The queue q of port22。
Preferred embodiment two:
Fig. 4 be according to the preferred embodiment of the invention OpenFlow implement Multicast QoS system framework figure, as shown in Figure 4,
Ensureing to realize the QoS of multicast, the preferred embodiment of the present invention designs two modules on the controller: multicast management mould
Block and QoS assurance module, wherein:
Multicast management module, sets up and builds for switch issue the knowledge of corresponding multicast for multicast group member management, multicast tree
Do not flow table (i.e. stream table 0), provide the multicast of each switch to produce port according to multicast tree structure to QoS module.
QoS assurance module, is responsible for setting up content recognition stream table (stream table 1) and corresponding gauge table, passes through OF-Config
Configure corresponding port queue.QoS assurance module, by according to the qos policy selected, is set up corresponding in gauge table
Quantifier.Wherein, stream table 0 is set up by multicast management module and is issued to switch, knows for realizing the multicast of switch
Not;Stream table 1 is set up by QoS assurance module and is issued to switch, for the Division identification of each content stream, and forwards to
In gauge table, corresponding quantifier processes;Gauge table is set up by QoS assurance module and is issued to switch, comprises
Multiple quantifiers realize different QoS and ensure, comprise one or more enqueue_apply by each quantifier and count
Amount band, enters different queues according to the stream of speed;Queue is configured by OF-Config, can arrange queue maximum speed
Rate, queue minimum-rate etc. assist and realize QoS guarantee.
Shown in Fig. 4, data enter the execution process of OpenFlow switch, comprise the steps:
Step S401, when data stream enters after OpenFlow switch, will enter streamline, carry out in stream table 0
Join, by performing the command adapted thereto of the stream list item that the match is successful, i.e. forward stream table 1 to.
Step S402, data stream continues coupling in stream table 1, to identify the content of stream, forwards to corresponding after the match is successful
Quantifier.
Step S403, after data stream enters corresponding quantifier, quantifier selects the configured rate of metering band to work as less than stream
That metering band maximum in front speed processes, and processing mode includes: drop, DSCP remark and enqueue
apply.Wherein, data stream can be forwarded to the specified queue of designated port by enqueue_apply metering band.
Step S404, data transfer port through queue, queue configuration is corresponding maximum or minimum-rate limits or
Ensure speed.
Preferred embodiment three:
Fig. 5 is easy according to the preferred embodiment of the invention OpenFlow multicast network topology schematic diagram, such as Fig. 5 institute
Show, it is assumed that multimedia Access Control (MAC) address of multicast source is 00:00:00:00:00:00, the user that multicast uses
Datagram (UDP) port is 100.The preferred embodiment of the present invention establishes a multicast at the controller of OpenFlow
Management module, is responsible for the addition of multicast member, multicast tree foundation, issues multicast identification for the foundation of corresponding switch
Stream table, to QoS module provide each switch multicast produce port.Shown in Fig. 5, the step bag of this flow process
Include:
Step S501, when one multicast application of needs is set up, each member of multicast is to the multicast pipe of OpenFlow controller
Reason module sends application, and group membership is managed by the multicast management module in OpenFlow controller.
Step S502, multicast group management module by the spanning tree algorithm according to network topology, Link State and selection,
Setting up a multicast tree for this multicast, Fig. 5 heavy black represents multicast tree.
Step S503, multicast tree set up after, multicast management module will according to multicast source MAC Address, udp port with
And the port of multicast tree turnover switch is that corresponding multicast identification stream table, i.e. stream table 0 are set up and issued to each switch.Stream
The matching domain of table 0 is that Ether_Src=source MAC, Src_Port=UDP port, Ingress_port=multicast tree are entered
Entering the port of switch, command adapted thereto is to enter stream Division identification stream table (i.e. stream table 1).Such as, switch 1 is set up
Multicast identification stream table is as shown in table 2:
Table 2
Step S504, multicast management module also needs to provide to QoS module the group of each switch according to multicast tree structure
Broadcast and produce port.Such as, it is port 3 and port 4 that the multicast of switch 1 goes out port, and this module needs to put forward this information
Supply QoS module, QoS sets up corresponding enqueue_apply metering band by utilizing this information auxiliary.
Preferred embodiment four:
Fig. 6 is that QoS ensures the flow chart implemented according to the preferred embodiment of the invention, and QoS assurance module will be according to institute
The QoS guarantee strategies selected, sets up corresponding stream table 1 and gauge table, and combines OF-Config and configure corresponding end
Mouth queue.Here, use Differentiated Services model (DiffServ), by the video of an application based on multicast, audio frequency,
The transmission of the contents such as text carries out differential service, it is therefore desirable to be identified different content stream, as shown in Figure 6, and should
Flow process comprises the steps:
Step S601, in order to realize differential service, utilizes the DSCP value of tos field in IP head, by arranging not
Different content is indicated with DSCP value.During multicast source encapsulated data packet, the DSCP value different to different curriculum offering.
For example, it is possible to text, audio frequency, video, the DSCP value of extended formatting content are respectively set to 4,3,2,1.
Step S602, in order to identify different content stream, QoS assurance module needs to set up corresponding stream table 1 and identifies
Different content stream.Due to the DSCP value that different curriculum offering is different, Match IP _ DSCP value therefore can be passed through
Identify different content stream, proceed to corresponding quantifier after the match is successful and realize corresponding QoS guarantee.Content recognition
Stream table is as shown in table 3:
Table 3
Match Fields | Priority | Counters | Instruction | Timeouts | Cookie |
IP_DSCP=2 | Meter meter_id=2 |
IP_DSCP=3 | Meter meter_id=3 | ||||
IP_DSCP=4 | Meter meter_id=4 |
When the DSCP value of data stream is 2, data stream will turn to quantifier 2 to process;When DSCP value is 3,
Quantifier 3 is then turned to process;When DSCP value is 4, then quantifier 4 is turned to process.Different quantifiers will be according to not
Same service strategy designs, thus realizes the differential service to different content stream.
The design of content recognition stream table is set forth above, has carried out separating by content stream different to video, audio frequency, text and known
Not.After the multicast of each switch that QoS module receives the offer of multicast management module produces port information, in addition it is also necessary in each friendship
Change planes and design corresponding quantifier for various content streams and configure corresponding port queue.In order to realize the stream of each content transmission
Freely, each content stream stream can be carried out bandwidth safeguard.Can be according to the feature of each content stream, in the preferred embodiment of the present invention,
Each content rate is carried out grade classification, respective queue is set, set up corresponding measurement device.Illustrate as a example by video flowing below
Step S603 is to step S605:
Step S603, according to feature and the granularity of division of video rate, divides several grade by video rate.Example
As, for a transfer rate, the video flowing of mainly change between 0~1000kbps, can be divided into 3 by speed
Individual grade: 0~100kbps, 100~500kbps, 500~1000kbps.
Step S604, sets up corresponding team by OF-Config agreement in the speed that each multicast forwarding port is each grade
Row, arrange corresponding minimum-rate for individual queue.Such as, produce port to each multicast and 3 queues are set, as at figure
The queue 1 of the port 3 of the switch 1 shown in 5 and the queue 2 of port 4 all have min_rate=100kbps, end
The queue 4 of mouth 3 queues 3 and port 4 all has min_rate=500kbps, port 3 queue 5 and the team of port 4
Row 6 all have min_rate=1000kbps, realize basic, normal, high three kinds of forwarding rates respectively.
Step S605, utilizes enqueue apply metering band to set up the Meter id in corresponding quantifier, such as table 4
It is the quantifier (i.e. quantifier 2) of 2:
Table 4
Utilize quantifier 2, the video flowing of different brackets speed can be adjusted into the different queue of each multicast port.
When video flowing processes through quantifier 2, if the speed of video flowing is when 0~100kbps, then the queue 1 of entry port 3
With the queue 2 of port 4, its minimum forwarding rate is 100kbps, is entirely capable of ensureing the transmission of its smoothness;Same speed
When 100~500kbps, the queue 3 of entry port 3 and the queue 4 of port 4;Speed when 500~1000kbps,
The queue 5 of entry port 3 and the queue 6 of port 4.The advantage of the method is, making video flowing enter can be the most satisfied
The queue of its rate requirement, is not take up again too much resource simultaneously.As when video stream rate is bigger, then be forwarded into
Enter high-speed queue, when rate reduction to low speed queue can meet its require time, be forwarded entrance low speed queue, in order to avoid low
Speed stream takies high-speed queue and causes the wasting of resources.In order to prevent, video flowing momentary rate is excessive takies the too many network bandwidth,
Can also be at quantifier by increasing the metering band of a drop type, the configured rate arranging this metering band is high speed team
The speed of row, when speed exceedes speed at a high speed, gauge table will abandon data, to reach the purpose of limiting speed.
If the speed limit of the quantifier 2 in table 4 is 1000kbps, when then abandoning data more than 1000kbps.
Audio stream, text flow transfer rate relatively small, change the least, therefore can not carry out the classification of speed,
All stage speeds such as only one of which, only need each multicast port of each leisure set up a queue, and queue arranges corresponding minimum speed
Rate.Set up the quantifier of the metering band containing only an enqueue apply type respectively then to both content stream, will
Both stream is separately sent to the most corresponding queue of each multicast port to ensure facile transport.
Such as, as in table 4, Meter id is shown in the quantifier of 3 (i.e. quantifier 3), for a transfer rate master
Will the audio frequency of change between 0~100kbps, one queue is set in each multicast port, the queue 7 of port 3
Queue 8 with port 4 all has min_rate=100kbps.Then in gauge table, quantifier 3 is set up, containing only one
Individual configured rate is the enqueue apply type metering band of 0kbps, then audio stream is all forwarded to port through this quantifier
The queue 7 of 3 and the queue 8 of port 4.
The most such as, as in table 4, Meter id is shown in the quantifier of 4 (i.e. quantifier 4), for a transfer rate
The text of main change between 0~200kbps, arranges a queue in each multicast port, the queue 9 of port 3
Queue 10 with port 4 all has min_rate=200kbps.Then in gauge table, quantifier 4 is set up, containing only one
Individual configured rate is the enqueue apply type metering band of 0kbps, then text flow is all forwarded to port through this quantifier
The queue 9 of 3 and the queue 10 of port 4.
Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general
Calculating device to realize, they can concentrate on single calculating device, or be distributed in multiple calculating device and formed
Network on, alternatively, they can realize, it is thus possible to by them with calculating the executable program code of device
Storage is performed by calculating device in the storage device, and in some cases, can hold with the order being different from herein
Step shown or described by row, or they are fabricated to respectively each integrated circuit modules, or by many in them
Individual module or step are fabricated to single integrated circuit module and realize.So, the present invention is not restricted to any specific hardware
Combine with software.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the technology of this area
For personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made is any
Amendment, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (21)
1. a method for stream processing, it is characterised in that including:
Receiving the configuration to the type measuring band in OpenFlow agreement quantifier, wherein, described type includes:
Enqueue application, described enqueue application is used for port and the team of described port indicating the stream of corresponding speed to add
Row;
According to the type of described metering band, process by the stream of described metering band.
Method the most according to claim 1, it is characterised in that described enqueue application at least includes:
The team of the port that the configured rate of stream is corresponding with the configured rate of stream with the port corresponding to configured rate of stream
Row.
Method the most according to claim 1, it is characterised in that described type also includes at least one of:
Abandon, differentiated services code points DSCP heavy label.
Method the most according to claim 3, it is characterised in that in the type according to the plurality of metering band, to passing through
Before the stream of described metering band processes, described method also includes:
Receiving the configuration of convection current table, wherein, being configured to indicate that of described stream table has the stream of corresponding DSCP value and answers
The quantifier added;
According to the configuration of described stream table, the described stream with default DSCP value is added in described quantifier, wherein,
The described stream of described default DSCP value is configured to add described quantifier in the configuration of described stream table.
Method the most according to claim 4, it is characterised in that
The described default DSCP value of described stream is for indicating the content of described stream, and wherein, described content at least includes:
Video, audio frequency, text.
Method the most according to claim 5, it is characterised in that indicate the content of described stream in described default DSCP value
In the case of video, according to the type of described metering band, include carrying out process by the stream of described metering band:
The stream in described stream with first rate is added the first metering band, and according to the type of described first metering band,
Process by the stream of described first metering band;
The stream in described stream with the second speed is added the second metering band, and according to the type of described second metering band,
Process by the stream of described second metering band.
Method the most according to claim 6, it is characterised in that according to the type of described first metering band, to passing through
State the stream of the first metering band to carry out process and include:
In the case of the type of described first metering band is enqueue application, the stream with described first rate is added
Enter the first queue of the first port.
Method the most according to claim 6, it is characterised in that according to the type of described second metering band, to passing through
State the stream of the second metering band to carry out process and include:
In the case of the type of described second metering band is enqueue application, the stream with described second speed is added
Enter the second queue of the second port;
Described second metering band type for abandoning in the case of, the stream with described second speed is abandoned;
Wherein, described first rate is less than described second speed.
Method the most according to claim 5, it is characterised in that indicate the content of described stream in described default DSCP value
In the case of audio frequency, according to the type of described metering band, include carrying out process by the stream of described metering band:
The stream in described stream with third speed is added described 3rd metering band;
In the case of the type of described 3rd metering band is enqueue application, the stream with described third speed is added
Enter the 3rd queue of the 3rd port.
Method the most according to claim 5, it is characterised in that indicate the content of described stream in described default DSCP value
In the case of text, according to the type of described metering band, include carrying out process by the stream of described metering band:
The stream in described stream with fourth rate is added described 4th metering band;
In the case of the type of described 4th metering band is enqueue application, the stream with described fourth rate is added
Enter the 4th queue of the 4th port.
11. 1 kinds of current processing devices, it is characterised in that including:
First configuration module, for receiving the configuration to the type measuring band in OpenFlow agreement quantifier, its
In, described type includes: enqueue application, and described enqueue application is for indicating the stream of corresponding speed to add
Port and the queue of described port;
First processing module, for the type according to described metering band, processes by the stream of described metering band.
12. devices according to claim 11, it is characterised in that described enqueue application at least includes:
The team of the port that the configured rate of stream is corresponding with the configured rate of stream with the port corresponding to configured rate of stream
Row.
13. devices according to claim 11, it is characterised in that described type also includes at least one of:
Abandon, differentiated services code points DSCP heavy label.
14. devices according to claim 13, it is characterised in that described device also includes:
Second configuration module, for receiving the configuration of convection current table, wherein, described being configured to indicate that of stream table has
The quantifier that the stream of corresponding DSCP value should add;
Second processing module, for the configuration according to described stream table, adds the described stream with default DSCP value
In described quantifier, wherein, the described stream of described default DSCP value is configured to answer in the configuration of described stream table
Add described quantifier.
15. devices according to claim 14, it is characterised in that
The described default DSCP value of described stream is for indicating the content of described stream, and wherein, described content at least includes:
Video, audio frequency, text.
16. devices according to claim 15, it is characterised in that described first processing module includes:
First processing unit, in the case of indicate the content of described stream to be video in described default DSCP value,
The stream in described stream with first rate is added the first metering band, and according to the type of described first metering band, right
Processed by the stream of described first metering band;
Second processing unit, in the case of indicate the content of described stream to be video in described default DSCP value,
The stream in described stream with the second speed is added the second metering band, and according to the type of described second metering band, right
Processed by the stream of described second metering band.
17. devices according to claim 16, it is characterised in that
Described first processing unit, in the case of being enqueue application in the type of described first metering band, will
The stream with described first rate adds the first queue of the first port.
18. devices according to claim 16, it is characterised in that
Described second processing unit, in the case of being enqueue application in the type of described second metering band, will
The stream with described second speed adds the second queue of the second port;And described second metering band type be
In the case of abandoning, being abandoned by the stream with described second speed, wherein, described first rate is less than described second
Speed.
19. devices according to claim 15, it is characterised in that described first processing module also includes:
3rd processing unit, in the case of indicate the content of described stream to be audio frequency in described default DSCP value,
The stream in described stream with third speed is added described 3rd metering band;The type of band is measured for entering the described 3rd
In the case of queue application, the stream with described third speed is added the 3rd queue of the 3rd port.
20. devices according to claim 15, it is characterised in that described first processing module also includes:
Fourth processing unit, in the case of indicate the content of described stream to be text in described default DSCP value,
The stream in described stream with fourth rate is added described 4th metering band;The type of band is measured for entering the described 4th
In the case of queue application, the stream with described fourth rate is added the 4th queue of the 4th port.
21. the metering belt type of an extension, it is characterised in that
Described metering belt type includes following parameters: configured rate rate, enqueue action number
Enqueue_number, port numbers port and queue number queue_id;
Wherein, described metering belt type is for indicating metering band, according to the speed of stream, data proceed to one or more end
The respective queue of mouth.
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Application publication date: 20170111 |