CN102025640A - Flow control method, device and network device - Google Patents
Flow control method, device and network device Download PDFInfo
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- CN102025640A CN102025640A CN2010106063720A CN201010606372A CN102025640A CN 102025640 A CN102025640 A CN 102025640A CN 2010106063720 A CN2010106063720 A CN 2010106063720A CN 201010606372 A CN201010606372 A CN 201010606372A CN 102025640 A CN102025640 A CN 102025640A
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Abstract
The invention provides a flow control method, device and network device. The method comprises the following steps: obtaining the input data flow and output data flow of a network device; obtaining the flow control level of the network device according to the input data flow, the output data flow and at least one preset threshold; and executing a flow control operation corresponding to the flow control level to perform flow control. By adopting the flow control method, device and network device in the invention, the flow control operation corresponding to the flow control level can be executed to perform flow control. Compared with the prior art, the flow control operation can be executed dynamically according to the flow control level to perform flow control, thus the flow control effect is higher, the network congestion is alleviated and the utilization rate of the network bandwidth is increased.
Description
Technical field
The present invention relates to the network communications technology, relate in particular to a kind of flow control methods, device and the network equipment.
Background technology
Point-to-point (Peer to Peer; Abbreviate as: it is a kind of based on the P2P The Application of Technology P2P) using.In the P2P system, each client can constantly be uploaded data again in data download, this can alleviate the burden of carrier server, the user also can obtain smooth service simultaneously, therefore, emerge in an endless stream based on the P2P The Application of Technology, for example: softwares such as PPLIVE, QQLIVE all belong to the software of using the P2P technology.Present most P2P uses and uses User Datagram Protocol (UserDatagram Protocol; Abbreviate as: UDP) carry out transfer of data, wherein have identical sources Internet protocol (Internet Protocol; Abbreviate as: IP) message flow of address, purpose IP address, IP agreement, UDP source port and UDP destination interface is a data flow.
Along with the P2P application is more and more general, P2P uses and has consumed a large amount of network bandwidths, if the flow in this P2P not being used is controlled, will have a strong impact on the normal use of whole network.Existing flow control methods mainly is by network gateway devices the flow that receives to be carried out the Control for Speed Limitation output flow, to reach the purpose of control input flow rate by the control to output flow.With network topology structure shown in Figure 1 is example, and Intranet PC is data flow f1 to the data flow that network gateway devices sends, and network gateway devices sends to (the Internet ServiceProvider of ISP after handling; Abbreviate as: ISP) data flow of network is data flow f2, and the data flow that sends to Intranet by the ISP network is data flow f3, and the data flow that sends to PC after network gateway devices is handled is data flow f4.For network gateway devices, directly control data flows f1 and data flow f3, and therefore, network gateway devices is by directly carrying out the purpose that speed limit reaches flow control to data flow f2 and data flow f4.For the congested situation of the excessive appearance of data flow f3, network gateway devices is to influence data flow f3 by control data stream f2 and data flow f4, this effect is generally relatively poor, because for P2P uses, because the correlation of flow is little before and after handling, therefore, being difficult to influences data flow f3 by the size of data flow f2 and data flow f4, and therefore, above-mentioned flow control method is difficult to effectively control the consumption of P2P flow to line bandwidth, still can cause network congestion, reduce utilization of network bandwidth.
In addition, the linking number by control P2P also is a kind of common flow control method.Because the data flow that P2P uses is all obtained from external client, in order to obtain speed faster, P2P uses all can require to connect more external client as far as possible, therefore, linking number by control P2P has certain fluid control effect, but fluid control effect is relatively poor, only needs connection seldom just can reach very big flow when being connected with owing to P2P.
In addition, prior art also has above-mentioned two kinds of methods are used in combination carries out flow control, but the defective of every kind of method still exists, and fluid control effect is still relatively poor.
Summary of the invention
The invention provides a kind of flow control methods, device and the network equipment,, alleviate network congestion, improve network bandwidth utilance in order to improve the effect of flow control.
The invention provides a kind of flow control methods, comprising:
Obtain the input traffic amount and the dateout flow of the network equipment;
According to described input traffic amount, described dateout flow and at least one predetermined threshold value, obtain the Flow Control rank of the described network equipment;
Carry out the control operation of described Flow Control rank corresponding flow, to carry out flow control.
The invention provides a kind of volume control device, comprising:
The flow acquisition module is used to obtain the input traffic amount and the dateout flow of the network equipment;
The rank acquisition module is used for obtaining the Flow Control rank of the described network equipment according to described input traffic amount, described dateout flow and at least one predetermined threshold value;
Executive Module is used to carry out the control operation of described Flow Control rank corresponding flow, to carry out flow control.
The invention provides a kind of network equipment, comprise arbitrary volume control device provided by the invention.
Flow control methods of the present invention, device and the network equipment, the data traffic of data traffic by obtaining fan-in network equipment and network equipment output; According to input traffic amount, dateout flow and at least one predetermined threshold value, can obtain the current Flow Control rank of the network equipment, then, carry out with the corresponding flow control of Flow Control rank and operate to carry out flow control.Compared with prior art, the present invention can dynamically carry out the flow control operation to carry out flow control according to the Flow Control rank, and its flow control effect is higher, has alleviated network blockage, has improved utilization of network bandwidth.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of network topology structure schematic diagram of prior art;
The flow chart of the flow control methods that Fig. 2 provides for the embodiment of the invention one;
The flow chart of the flow control methods that Fig. 3 provides for the embodiment of the invention two;
The structural representation of the volume control device that Fig. 4 provides for the embodiment of the invention three;
The structural representation of the volume control device that Fig. 5 provides for the embodiment of the invention four.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The flow chart of the flow control methods that Fig. 2 provides for the embodiment of the invention one.As shown in Figure 2, the method for present embodiment comprises:
Wherein, the network equipment mainly is meant the network gateway devices that is positioned at network edge, and the data flow of network equipment place network is gone in mainly responsible convection current and the data flow of outflow network is carried out flow control; Usually, the permission flow threshold of the network equipment by setting in advance carries out flow control.Concrete, the network equipment receives the data traffic of being gone into network by outer flow, i.e. input traffic amount, and according to allowing flow threshold that this input traffic amount is carried out flow control, output is through the data flow after the flow control, i.e. dateout flow then.In the present embodiment, the network equipment obtains input traffic amount and dateout flow.
Usually, the input traffic amount and the dateout flow of the network equipment are approaching more, illustrate that network state is good more, and bandwidth availability ratio is high more; And if the input traffic amount illustrates that much larger than the dateout flow network generation is congested, bandwidth availability ratio can reduce.Wherein, whether the magnitude relationship of input traffic amount and dateout flow can be expressed needs to carry out flow control, and the degree of carrying out flow control.
Wherein, the magnitude relationship of input traffic amount and dateout flow can be represented with the difference of input traffic amount and dateout flow, also can represent with the ratio of input traffic amount and dateout flow.Based on above-mentioned, in order to judge the magnitude relationship of input traffic amount and dateout flow, on the network equipment of present embodiment, set in advance at least one threshold value, by difference or ratio are compared with at least one threshold value, the magnitude relationship of present input data flow and dateout flow can be carried out classification, so that clearer understanding current network state and bandwidth availability ratio obtain the degree that need carry out flow control, i.e. the Flow Control rank simultaneously.Wherein, can be different according to the setting means of expression input traffic amount and at least one threshold value of mode of dateout flow size.For example: when adopting differential form, predetermined threshold value is a concrete data flow value, the unit with data traffic; When adopting ratio, predetermined threshold value also is a ratio, does not have unit.
When the network equipment gets access to the Flow Control rank, by carrying out the flow control operation that adapts with the Flow Control rank, so that the input traffic amount is controlled.For example: the Flow Control rank is higher when getting access to, and when promptly difference or ratio are big, can take multiple Flow Control strategy to carry out flow control simultaneously; When the Flow Control rank that gets access to is lower, promptly difference or ratio hour illustrate that input traffic amount and dateout flow are more approaching, at this moment, can adopt simple Flow Control strategy (for example packet loss processing) to carry out flow control.
Wherein, the flow control operation can be made of various Flow Control strategies, for example can comprise common speed limit operation (being the packet loss processing mode), the operation of blocking-up linking number etc.
The flow control methods of present embodiment, by obtaining the magnitude relationship of input traffic amount and dateout flow, and compare by magnitude relationship and predetermined threshold value with input traffic amount and dateout flow, obtain the Flow Control rank, take different flow control operations at different Flow Control ranks; And along with the carrying out of flow control, in fact the input traffic amount of obtaining and the magnitude relationship of dateout flow have reacted the effect of present flow rate control, promptly adopt the present embodiment technical scheme dynamically to adjust the flow control operation according to the effect of flow control, for example: when fluid control effect is better, can carry out better simply flow control operation; Especially when fluid control effect is relatively poor, can carry out the operation of flow control largely; Compared with prior art, improve the effect of flow control, can make input traffic amount and dateout flow approximately equal, alleviated network congestion, improved utilization of network bandwidth.
In this explanation, the flow control methods that the foregoing description provides can be applicable to the scene that any needs carry out flow control, is particularly useful for the network environment that exists P2P to use.In the P2P system, usually client can connect with request and obtains resource to the outer a plurality of Resource Servers transmission request messages of net by network gateway devices in the net, therefore, in the P2P system, the input traffic amount typically refers to the resource data stream that a plurality of Resource Servers of connecting with the Intranet client provide, the dateout flow is meant through network gateway devices and carries out the resource data stream that flow control sends to requesting client afterwards, the resource data stream that the common resource data stream that sends to requesting client through network gateway devices provides less than Resource Server.
Wherein, when having set in advance a threshold value on the network equipment, the Flow Control state of the network equipment can be divided into two grades by this threshold value; When having set in advance two threshold values on the network equipment, the Flow Control state of the network equipment can be divided into Three Estate by two threshold values; The rest may be inferred, the threshold value that is provided with on the network equipment is many more, the grade that the Flow Control state of the network equipment is divided is just many more, that just the Flow Control state is divided is thin more, the flow control of being carried out is just accurate more, the flow control effect is just good more, also just can alleviate network congestion more, improve network bandwidth utilance.For specifically the Flow Control state being divided into several grades, can carry out the adaptability setting in conjunction with the real network state, present embodiment is not done qualification to this.
Based on the foregoing description, below will be provided with two threshold values with the network equipment is example, and step 22 is elaborated.Concrete, the network equipment is provided with first predetermined threshold value and second predetermined threshold value, and wherein first predetermined threshold value is greater than 0 and less than default second threshold value.After the network equipment obtains input traffic amount and dateout flow, further obtain the difference of input traffic amount and dateout flow; The network equipment compares the difference obtained and first predetermined threshold value and second predetermined threshold value; When difference equals 0, illustrate that input traffic amount and dateout flow equate that the packet loss phenomenon does not appear in data traffic, the network equipment allows any input traffic amount to pass through, and promptly the network equipment can carry out the flow control operation; When difference greater than 0, and when being less than or equal to first predetermined threshold value, determine that the Flow Control rank is the first-class control rank; When difference greater than first predetermined threshold value and when being less than or equal to second predetermined threshold value, determine that the Flow Control rank is the second Flow Control rank; When difference is preset thresholding greater than second, determine that the Flow Control rank is the 3rd Flow Control rank.Wherein, other increases along with the Flow Control level, and required degree of carrying out flow control is more and more higher.In present embodiment and follow-up each embodiment, be that example describes all with the difference of obtaining input traffic amount and dateout flow.
Based on the foregoing description, and be example with the P2P system, present embodiment provides a kind of embodiment of step 23.This execution mode comprises: when the Flow Control rank was the first-class control rank, the network equipment carries out packet loss to the input traffic amount to be handled, and is about to directly abandon greater than the flow that allows flow threshold, to carry out flow control; When the Flow Control rank was the second Flow Control rank, the network equipment carries out packet loss to the input traffic amount to be handled, and carries out the operation that first blocking-up connects, to carry out flow control; When the Flow Control rank was the 3rd Flow Control rank, the network equipment carries out packet loss to the input traffic amount to be handled, and carries out the operation that first blocking-up connects, and carries out the operation that second blocking-up connects, to carry out flow control.Wherein, the operation of the first blocking-up connection mainly is meant according to connecting the blocking-up operation of sum to having connected; The operation that second blocking-up connects mainly is meant when the operation that connects in first blocking-up fails to reach the flow control purpose, blocking-up of carrying out desiring to connect and/or the further blocking-up of carrying out connecting.
Based on as can be known above-mentioned, in the present embodiment, other increases along with the Flow Control level, and the flow control operation that the network equipment carried out increases gradually, to reach the purpose of flow control as early as possible, improves the effect of flow control.Wherein, the packet loss that the network equipment carries out under each Flow Control rank is handled, and is actually a kind of common speed limit mode, is about to the input traffic amount that receives and allows flow threshold to compare, to abandon greater than the input traffic amount that allows flow threshold, to carry out Flow Control.Wherein, when the Flow Control rank is the second Flow Control rank, illustrate that the network equipment only carries out common packet loss and handles the purpose that can't reach control input traffic amount, therefore, in the present embodiment, the network equipment continues to carry out the operation that first blocking-up connects, by reducing linking number (in the P2P system, mainly be meant by reducing the Resource Server that is connected with the Intranet client and then reducing resource data stream) limit the input traffic amount, fast the input traffic amount is controlled in the permission flow threshold of the network equipment.Wherein, when the Flow Control rank is in the 3rd Flow Control rank, illustrate that the current network congestion situation is very serious, the network equipment carries out the packet loss processing and carries out the first blocking-up attended operation and may still can't effectively control the input traffic amount.This is because in the various systems of similar P2P system, with the P2P system is example, usually the P2P application software is in order to guarantee speed, can constantly set up new being connected with the P2P node of outer net, especially when the outside can provide the P2P node of resource a lot, a large amount of new connection meetings are constantly set up, and newly connect data traffic that is provided even the speed that can surpass flow control.At the problems referred to above, in the present embodiment, the network equipment is further by carrying out the operation that second blocking-up connects, to carry out flow control.Wherein, the operation that second blocking-up connects can be to the blocking-up operation of desiring to connect, and also can be the further blocking-up operation to having connected, can also be in conjunction with the blocking-up operation of desiring to connect and having connected and carried out.Wherein, in the operation that first blocking-up connects, the network equipment is lower to the blocking-up degree that has connected, will consider the operating position of P2P client usually, promptly blocks connecting under the situation of the use fluency that guarantees the P2P client.And in the operation that second blocking-up connects, the network equipment is higher to the blocking-up degree that has connected, normally to realize that flow control is a target, may guarantee the use fluency of client.
The flow control methods of present embodiment, at different Flow Control ranks, it is the flow control operation that the congested state of current network is carried out different stage, can guarantee under any congestion state, all can fast the input traffic amount be restricted to the permission flow threshold scope of the network equipment, improve the effect of flow control, be particularly useful for the P2P system.
Further, in conjunction with the P2P system, Intranet P2P node is by sending the request message that connects to outer net P2P node, to realize establishment of connection; And when every connection was set up, the network equipment all can be made the record of corresponding information, and promptly record connects the information, the information of the Intranet P2P node of the quantity that has for example connected, every connection and outer net P2P node etc. set up.Based on the above-mentioned attribute of P2P system, in the above-described embodiments, it is as follows that the network equipment is carried out a kind of execution mode of the operation that first blocking-up connects: the network equipment connects sum by preestablishing, and is required in order to carrying out flow control; The network equipment is set up the quantity that has connected in the information according to the connection of record, judges that whether the quantity that has connected is greater than the default sum that connects; If judged result is for being, explanation may be because the network congestion that the quantity that has connected too much causes, and therefore, the network equipment can connect total connecting and block at random exceeding; Concrete, the network equipment can exceed the employed port that connects that connects sum and blocks and connect by closing, also can disconnect the connection requests message, can also block this connection in the mode that abandons follow-up all messages of this connection by sending request to outer net P2P node; In addition, for the connection based on Transmission Control Protocol, the network equipment also can send the message that connects that resets disconnects connection, perhaps responds the inaccessible icmp packet of purpose (allowing the other side think that the local terminal network equipment does not exist) thereby the disconnection connection.If judged result is for denying, the number of connection that be described this moment does not surpass total linking number, but may be because the input traffic amount of every connection is very big, cause the generation network congestion, therefore, when the network equipment carries out packet loss processing operation according to it each bar is connected the packet loss amount of carrying out, sort, begin to block from connecting of packet loss amount maximum then connecting to connecting; Wherein, employed concrete blocking way can adopt above-mentioned any one blocking way or its combination.In this explanation, because current Flow Control rank is the second Flow Control rank, network congestion does not also reach very serious situation, therefore, suitably blocks connecting at the use fluency that can consider client.
Further, when the quantity that has connected surpasses the connection sum, all exceed after the connecting of connection sum if the network equipment is in blocking-up, also the input traffic amount is not controlled to the permission flow threshold scope of the network equipment, the network equipment can continue to carry out to be blocked not surpassing connecting of connection sum, its blocking-up order, blocking-up degree and the mode of specifically blocking all can adopt the above-mentioned quantity that has connected to carry out above the situation that is connected sum, do not repeat them here.
In this explanation, to the blocking-up that connected operation (i.e. the operation that first blocking-up connects) can be to be target to reach network equipment permission flow threshold, also can preestablish the maximum intercell connector number (can consider the behaviour in service of client) that allows blocking-up, stop when this maximum intercell connector is counted continuing to block connecting when the quantity of blocking that has connected reaches.Usually it is preferential as the target that the blocking-up that has connected is operated to preestablish the maximum intercell connector number that allows blocking-up, in this case, might yet the input traffic amount not being limited in the network equipment to the blocking-up EO that connected the time allows in the flow threshold scope, then can carry out the operation that second blocking-up connects, i.e. the operation that blocking-up connects is not restricted to carry out when the Flow Control rank is the 3rd Flow Control rank.
Based on the foregoing description, present embodiment provides a kind of network equipment to carry out a kind of execution mode of the operation of the second blocking-up connection, concrete, the network equipment is desired to connect with blocking-up by abandoning Intranet P2P node to the request message that connects that outer net P2P node sends; The execution mode that this second blocking-up connects is by stoping new establishment of connection, to accelerate the speed of flow control.Further, present embodiment also provides a kind of network equipment to carry out the execution mode of the operation of the second blocking-up connection, the execution mode that this second blocking-up connects is actually a kind of further blocking-up operation to having connected, concrete, when the operation of the network equipment execution first blocking-up connection fails to reach the purpose of flow control, the network equipment adds up the current input traffic amount that has connected from small to large successively, and blocking-up makes the input traffic amount sum of obtaining greater than allowing connecting of flow threshold; More specifically: the network equipment can sort the current input traffic amount that has connected according to from small to large order, then, according to from small to large order the current input traffic amount that has connected is added up up to input traffic amount sum successively greater than till allowing flow threshold, the connection of the input traffic amount correspondence that will add up at last then and ordering other connections this connections after are blocked.This mode is not subjected to the restriction of total linking number, it mainly is purpose with the flow control, do not consider the user mode of client, can fast the input traffic amount be controlled to the flow threshold scope that allows, improved the speed of flow control, improve the effect of flow control, solved the network congestion problem fast.
Need explanation at this, be meant when adopting the blocking-up operation that has connected according to input traffic amount sum the also connection of Cun Zaiing the above " current connect ".Because before carrying out this operation, carried out the blocking-up operation that has connected according to total linking number, and in the process of carrying out various flow control operations, new connection is being set up still, therefore, the quantity that has connected in whole flow control process is dynamic change.
Further, the operation that the network equipment is carried out the second blocking-up connection can also comprise above-mentioned blocking-up operation and the further blocking-up operation to having connected to desiring to connect simultaneously, concrete: the network equipment fails the input traffic amount is restricted to when allowing the flow threshold scope carrying out operation that first blocking-up connects, can carry out the blocking-up operation to desiring to connect earlier; Wherein, because the network equipment can not unconfinedly be blocked desiring to connect, therefore, the network equipment can preestablish the maximum blocking-up quantity to desiring to connect; When the network equipment reaches predefined maximum blocking-up quantity to the blocking-up quantity of desiring to connect, still fail the input traffic amount is restricted to the flow threshold scope that allows, at this moment, the network equipment can add up the current input traffic amount that has connected from small to large successively, blocking-up makes the input traffic amount sum obtained greater than allowing connecting of flow threshold, with by the further blocking-up that has connected being reached the purpose of flow control.
The flow chart of the flow control methods that Fig. 3 provides for the embodiment of the invention two.Present embodiment can realize that something in common repeats no more based on the foregoing description, and as shown in Figure 3, the method for present embodiment comprises:
Step 31, obtain the input traffic amount of the network equipment and the difference of dateout flow;
Step 32, according to first predetermined threshold value, second predetermined threshold value and difference, obtain the Flow Control rank of the network equipment;
Step 33, the control operation of execution Flow Control rank corresponding flow are to carry out flow control;
Step 34, detect the input traffic amount, and judge whether the input traffic amount is in less than the state of the product of the default permission flow threshold and the default coefficient of stability and has continued default stabilization time; If judged result is for being that then execution in step 35; Otherwise, then change and go execution in step 33, promptly continue to carry out current flow control operation and carry out flow control.
Wherein, the coefficient of stability is greater than 0 and be less than or equal to 1.Usually the network equipment input traffic amount that requires to carry out after the flow control is no more than the permission flow threshold, and therefore, the coefficient of stability is preferably more than 0 and less than 1.
Step 35, basis are carried out the Flow Control rank before the flow control, adjust current flow control operation, to carry out flow control.
Wherein, current flow control operation is meant that carrying out the pairing flow control of flow control Flow Control rank before operates.
Concrete, in actual implementation process, the network equipment generally can be in real time or is constantly detected input traffic amount and dateout flow, and obtain its difference, difference and predetermined threshold value are compared, obtain the Flow Control rank, and then carry out correspondingly flow control operation according to the Flow Control rank, be that the network equipment can come the modified flow rate control operation by carrying out above-mentioned steps 31-step 33 in real time or constantly, guarantee effect flow control.With respect to last flow control process, when execution in step 31-step 33 is carried out flow control, because last flow control meeting makes the input traffic amount obtain restriction, the Flow Control rank is reduced, therefore, in this time flow control process performed flow control operation may with on once different, may carry out low Flow Control rank corresponding flow control operation; And for next time flow control process, may be because of the variation of flow control operation, the Flow Control rank is uprised and carry out the control operation of high Flow Control rank corresponding flow.Promptly in order to have improved fluid control effect, in flow control process, Flow Control rank frequent variations may occur and frequently adjust the situation that flow control is operated, for fear of the frequent adjustment to the flow control operation, present embodiment provides a kind of execution mode that control operation is adjusted to flow by step 34 and step 35.
Wherein, the flow control methods of present embodiment, realizing flow control, and improve the flow control effect, alleviate on the basis of network congestion, the network equipment is judged the retention time of carrying out flow control effect after the flow control by setting in advance the coefficient of stability and stabilization time these two parameters on it, carries out the adjustment of flow control operation according to the retention time of flow control effect, can avoid occurring adjusting flow control and operating the flow situation fluctuated that occurs because of frequent.
Further, present embodiment provides a kind of embodiment of step 35, specific as follows: wherein, on the network equipment, store the mapping relations of Flow Control rank and flow control operation, therefore, the network equipment can be known the Flow Control rank of carrying out before the flow control according to the flow control of current execution operation.In addition, the network equipment can be stored this Flow Control rank temporarily when obtaining the Flow Control rank, and therefore, the network equipment also can obtain from memory space and carry out flow control Flow Control rank before.When the network equipment gets access to this Flow Control rank, judge that this Flow Control rank is first-class control rank, the second Flow Control rank or the 3rd Flow Control rank, and carry out the adjustment of flow control operation according to judged result.
When judging this Flow Control rank and be the first-class control rank, judged result according to step 34 can illustrate, solved the network congestion phenomenon through the input traffic amount being carried out the packet loss processing, and this phenomenon explanation current network is basicly stable, therefore, when network state is stablized, can forbid carrying out packet loss operation to the input traffic amount, promptly allow all input traffic amounts of letting pass.Wherein, the degree of stability of current network is relevant with the size of stabilization time; Default stabilization time is long more, illustrates that current network state is stable more.
When judging this Flow Control rank and be the second Flow Control rank, judged result according to step 34 can illustrate, handle and carry out the problem that first operation of blocking connection has solved network blockage through the input traffic amount being carried out packet loss, and current network is basicly stable, especially when the stabilization time that is provided with is big, illustrate that current network is more stable.Therefore, can forbid carrying out the operation that first blocking-up connects, to reduce degree to flow control.Concrete, opposite with the operation that first blocking-up connects, the port that the network equipment stops to continue having connected is closed, and perhaps stops to send disconnection connection requests message etc. to the P2P of the outer net that has connected node, so that the P2P node can normally connect.
When judging this Flow Control rank and be the 3rd Flow Control rank, judged result according to step 34 can illustrate, solved the problem of network blockage through the operation of the input traffic amount being carried out packet loss processing, the execution first blocking-up connection and the operation (comprising prevention and/or operations such as further blocking-up) of carrying out the second blocking-up connection etc. to having connected to newly connecting, and current network is basicly stable, especially when the stabilization time that is provided with is big, illustrate that current network is more stable.At this moment, the network equipment can be by forbidding carrying out the operation that first blocking-up connects, to reduce the degree to flow control.Concrete, opposite with the operation that first blocking-up connects, the port that the network equipment stops to continue having connected is closed, and perhaps stops to send disconnection connection requests message etc. to the P2P of the outer net that has connected node, so that the P2P node can normally connect.Wherein, because having reached, the input traffic amount allow flow threshold scope, the network equipment to stop according to input traffic amount sum greater than allowing flow threshold to come the further blocking-up that has connected is operated.
Further, whether the network equipment continue detects the input traffic amount of forbidding carrying out after the operation that first blocking-up connects, be in less than the state of the product of the default permission flow threshold and the default coefficient of stability and continued default stabilization time to judge the input traffic amount; If judged result for being, then forbids carrying out the operation of the second blocking-up connection; Otherwise the network equipment can continue to carry out forbids carrying out first blocking-up connection flow control operation afterwards, promptly continues to block desiring to connect, to carry out flow control.Wherein, in the present embodiment, it is opposite with the operation of carrying out the second blocking-up connection to forbid carrying out the operation that second blocking-up connects, and promptly no longer abandons the request message that connects that Intranet P2P node mails to outer net P2P node, so that the P2P node normally connects.Further, if be not the time because of the input traffic amount makes judged result more than or equal to the default product that allows flow threshold and the default coefficient of stability, in order to quicken the operation of flow control, the network equipment can also be carried out the operation of the first blocking-up connection once more.
By above-mentioned various execution modes, delay to adjust the time of flow control operation, both guaranteed the flow control effect, reduced the frequent degree of adjusting the flow control operation again, avoid occurring flow phenomenon fluctuated, further improved the effect of flow control.
In this explanation, in the various embodiments described above, the implementation of the operation that the operation that first blocking-up connects is connected with second blocking-up is not limited to this only for a kind of preferred version.Wherein, in conjunction with the real network situation, the adaptability of various flow control methods of the prior art change or combination all can be used as the implementation of the first blocking-up attended operation and the second blocking-up attended operation in the various embodiments of the present invention.
In this explanation, the technical scheme of the foregoing description can be implemented on network gateway devices, and can carry out by network gateway devices, both improved the effect of flow control, guaranteed the real-time of flow control again, and on network gateway devices, implement, need not to dispose extras, dispose simply easy to implement.
The structural representation of the volume control device that Fig. 4 provides for the embodiment of the invention three.As shown in Figure 4, the device of present embodiment comprises: flow acquisition module 41, rank acquisition module 42 and Executive Module 43.
Wherein, flow acquisition module 41 is used to obtain the input traffic amount and the dateout flow of the network equipment; Rank acquisition module 42 is connected with flow acquisition module 41, is used for obtaining the Flow Control rank of the network equipment according to input traffic amount, dateout flow and at least one predetermined threshold value; Executive Module 43 is connected with rank acquisition module 42, is used to carry out the control operation of Flow Control rank corresponding flow, to carry out flow control.
Above-mentioned each functional module can be used for carrying out the flow process of the flow control methods that said method embodiment provides, and its concrete operation principle sees the description of method embodiment for details, does not repeat them here.
The volume control device of present embodiment specifically by flow acquisition module, rank acquisition module and Executive Module, can obtain the data traffic of input flow rate control device and the data traffic of volume control device output; According to magnitude relationship and at least one predetermined threshold value of input traffic amount, dateout flow, can obtain the current Flow Control rank of volume control device, then, carry out with the corresponding flow control of Flow Control rank and operate to carry out flow control.Compared with prior art, adopt the volume control device of present embodiment can dynamically carry out the flow control operation to carry out flow control according to the Flow Control rank, its flow control effect is higher, has alleviated network blockage, has improved utilization of network bandwidth.
The structural representation of the volume control device that Fig. 5 provides for the embodiment of the invention four.Present embodiment is realized based on the foregoing description, as shown in Figure 5, the rank acquisition module 42 in the present embodiment device comprises: obtain submodule 420, comparison sub-module 421, first definite submodule 422, second definite submodule 423 and the 3rd definite submodule 424.
Wherein, obtain submodule 420, be connected, be used to obtain the difference of input traffic amount and dateout flow with flow acquisition module 41; Comparison sub-module 421 and is obtained submodule 420 and is connected, and is used for first predetermined threshold value of difference and at least one predetermined threshold value and second predetermined threshold value at least one predetermined threshold value are compared; First determines to be connected submodule 422 with comparison sub-module 421, is used in difference determining that greater than 0 and when being less than or equal to first predetermined threshold value Flow Control rank is the first-class control rank; Second determines to be connected submodule 423 with comparison sub-module 421, is used in difference determining that greater than first predetermined threshold value and when being less than or equal to second predetermined threshold value Flow Control rank is the second Flow Control rank; The 3rd determines to be connected submodule 424 with comparison sub-module 421, is used for during greater than second predetermined threshold value, determining that the Flow Control rank is the 3rd Flow Control rank in difference.
Each function sub-modules in the above-mentioned rank acquisition module can be used for carrying out the method flow when preestablishing two threshold values among the said method embodiment, and its operation principle sees the said method flow process for details, does not repeat them here.
Further, the Executive Module 43 in the present embodiment device comprises: first-class control submodule 431, the second Flow Control submodule 432 and the 3rd Flow Control submodule 433.
Wherein, first-class control submodule 431 determines that with first submodule 422 is connected, and is used for when the Flow Control rank is the first-class control rank, the input traffic amount is carried out packet loss handle, to carry out flow control; The second Flow Control submodule 432 determines that with second submodule 423 is connected, and is used for when the Flow Control rank is the second Flow Control rank, the input traffic amount is carried out packet loss handle, and carry out the operation that first blocking-up connects, to carry out flow control; The 3rd Flow Control submodule 433 determines that with the 3rd submodule 424 is connected, and is used for when the Flow Control rank is the 3rd Flow Control rank, the input traffic amount is carried out packet loss to be handled, and carry out the operation that first blocking-up connects, and carry out the operation that second blocking-up connects, to carry out flow control.
Wherein, each function sub-modules of above-mentioned Executive Module can be used for carrying out the method flow when presetting two threshold values among the said method embodiment, and its concrete operation principle can see the flow process of said method embodiment for details, specifically repeats no more.
Further, the second Flow Control submodule of present embodiment comprises: the first packet loss unit, judging unit, first blocking unit and second blocking unit.Wherein, the first packet loss unit is used for that the input traffic amount is carried out packet loss and handles; Judging unit is used for setting up information according to the connection of record, judges that whether the quantity that has connected is greater than the default sum that connects; First blocking unit is used in the judged result of judging unit when being, connects connecting of sum and blocks at random exceeding; Second blocking unit is used in the judged result of judging unit for not the time, sorts to connecting according to the packet loss amount of the first packet loss unit, begins to block connecting from connecting of packet loss amount maximum.In this embodiment, the operation that first blocking-up connects mainly is meant according to connecting sum the blocking-up that has connected is operated, and this blocking-up operation will consider the network behaviour in service of client usually.
The 3rd Flow Control submodule of present embodiment comprises: the second packet loss unit, discarding unit and the 3rd blocking unit.Wherein, the second packet loss unit is used for that the input traffic amount is carried out packet loss and handles; Discarding unit is used to abandon that client sends newly sets up the connection requests message, desires to connect with blocking-up; The 3rd blocking unit is used for the current input traffic amount that has connected is added up from small to large successively, and blocking-up makes input traffic amount sum the connecting greater than default permission flow threshold of obtaining.
Wherein, the 3rd Flow Control subelement of present embodiment can include only second packet loss unit and the discarding unit, to carry out the blocking-up operation to desiring to connect; The 3rd Flow Control submodule of present embodiment also can only comprise the 3rd blocking unit, to carry out the further blocking-up operation to having connected; In addition, the 3rd Flow Control submodule of present embodiment can also comprise above-mentioned each functional unit simultaneously, with in conjunction with to desire to connect and to the blocking-up that connected to realize flow control.The operation that second blocking-up in this embodiment connects mainly is meant blocking-up and/or the further blocking-up to having connected to desiring to connect; Wherein, normally be that purpose is carried out to the further blocking-up that has connected with the flow control.
Concrete, above-mentioned each functional unit can be with carrying out the said method embodiment operation that execution first blocking-up connects when presetting two threshold values and carrying out the method for operating flow process that second blocking-up is connected, its concrete operation principle sees method embodiment for details, does not repeat them here.
Based on the foregoing description, as shown in Figure 5, the device of present embodiment also comprises: detection module 44, judge module 45 and adjusting module 46.
Wherein, detection module 44 is connected with Executive Module 43, is used for after Executive Module 43 carries out flow control, detects the input traffic amount; Judge module 45 is connected with detection module 44, is used to judge whether the input traffic amount is in less than the state of the default product that allows the flow threshold and the default coefficient of stability and has continued default stabilization time, and the described coefficient of stability is greater than 0 and be less than or equal to 1; Adjusting module 46 is connected with judge module 45, is used in judged result when being, according to the Flow Control rank of carrying out before the flow control, adjusts current flow control and operates, to carry out flow control.
Wherein, when presetting two threshold values, the adjusting module 46 of present embodiment specifically can be realized by following structure, but be not limited to this.Adjusting module 46 comprises: first forbids submodule 461, when being used for Flow Control rank before carrying out flow control and being the first-class control rank, forbids that the input data are carried out packet loss to be handled; Second forbids submodule 462, when being used for Flow Control rank before carrying out flow control and being the second Flow Control rank, forbids carrying out the operation that first blocking-up connects; The 3rd forbids submodule 463, when being used for Flow Control rank before carrying out flow control and being the 3rd Flow Control rank, forbid carrying out the operation that first blocking-up connects, and continue to detect the input traffic amount of forbidding carrying out after the operation that first blocking-up connects and whether be in less than the state of the product that allows the flow threshold and the coefficient of stability and continued stabilization time, and in judged result when being, forbid carrying out the operation that second blocking-up connects.
Above-mentioned each functional module and function sub-modules can be used for carrying out the method flow that control operation is adjusted to flow among the said method embodiment, and its concrete operation principle sees method embodiment for details, does not repeat them here.
The volume control device of present embodiment, realizing flow control, and improve the flow control effect, alleviate on the basis of network congestion, judge the retention time of carrying out flow control effect after the flow control by setting in advance the coefficient of stability and stabilization time these two parameters on it, carry out the adjustment of flow control operation according to the retention time of flow control effect, can avoid occurring adjusting flow control and operating the flow situation fluctuated that occurs because of frequent.
The embodiment of the invention five provides a kind of network equipment, comprises the volume control device that the foregoing description provides.The network equipment of present embodiment can be the outlet device in the diverse network structure, is particularly useful for existing in the network of P2P application, can be used for carrying out flow control.
The network equipment of present embodiment, comprise the volume control device that the foregoing description provides, can be used for carrying out the flow process of the flow control methods that said method embodiment provides, can carry out the flow control operation to carry out flow control according to the Flow Control level dynamic, its flow control effect is higher, alleviate network blockage, improved utilization of network bandwidth.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (13)
1. a flow control methods is characterized in that, comprising:
Obtain the input traffic amount and the dateout flow of the network equipment;
According to described input traffic amount, described dateout flow and at least one predetermined threshold value, obtain the Flow Control rank of the described network equipment;
Carry out the control operation of described Flow Control rank corresponding flow, to carry out flow control.
2. flow control methods according to claim 1 is characterized in that, described according to described input traffic amount, described dateout flow and at least one predetermined threshold value, the Flow Control rank of obtaining the described network equipment comprises:
Obtain the difference of described input traffic amount and described dateout flow;
First predetermined threshold value in described difference and described at least one predetermined threshold value and second predetermined threshold value in described at least one predetermined threshold value are compared;
If described difference is greater than 0 and be less than or equal to described first predetermined threshold value, determine that described Flow Control rank is the first-class control rank;
If described difference is greater than described first predetermined threshold value and be less than or equal to described second predetermined threshold value, determine the described Flow Control rank second Flow Control rank;
If described difference greater than described second predetermined threshold value, determines that described Flow Control rank is the 3rd Flow Control rank.
3. flow control methods according to claim 2 is characterized in that, the control operation of the described Flow Control rank of described execution corresponding flow comprises to carry out flow control:
If described Flow Control rank is the first-class control rank, described input traffic amount is carried out packet loss handle, to carry out flow control;
If described Flow Control rank is the second Flow Control rank, described input traffic amount is carried out packet loss handle, and carry out the operation that first blocking-up connects, to carry out flow control;
If described Flow Control rank is the 3rd Flow Control rank, described input traffic amount is carried out packet loss handle, and carry out the operation that first blocking-up connects, and carry out the operation that second blocking-up connects, to carry out flow control.
4. flow control methods according to claim 3 is characterized in that, the operation that described execution first blocking-up connects comprises:
Information is set up in connection according to record, judges that whether the quantity that has connected is greater than the default sum that connects;
If judged result is for being, describedly connects total connecting and block at random exceeding;
If judged result is not, the packet loss amount of handling according to described packet loss sorts to described having connected, begins described having connected blocked from connecting of packet loss amount maximum;
The operation that described execution second blocking-up connects comprises:
Abandon the request message that connects that client sends, desire to connect with blocking-up; And/or
The current input traffic amount that has connected is added up from small to large successively, and blocking-up makes input traffic amount sum the connecting greater than default permission flow threshold of obtaining.
5. according to claim 2 or 3 or 4 described flow control methods, it is characterized in that, carrying out the control operation of described Flow Control rank corresponding flow, also comprise afterwards to carry out flow control:
Detect described input traffic amount, and judge whether described input traffic amount is in less than the state of the default product that allows the flow threshold and the default coefficient of stability and has continued default stabilization time, and the described coefficient of stability is greater than 0 and be less than or equal to 1;
If judged result for being, according to carrying out flow control described Flow Control rank before, is adjusted current flow control operation, to carry out flow control.
6. flow control methods according to claim 5 is characterized in that, according to carrying out flow control described Flow Control rank before, adjusts current flow control operation, comprises to carry out flow control:
If the described Flow Control rank of carrying out before the flow control is the first-class control rank, forbid that described input data are carried out packet loss to be handled;
If the described Flow Control rank of carrying out before the flow control is the second Flow Control rank, forbid carrying out the operation that first blocking-up connects;
If the described Flow Control rank of carrying out before the flow control is the 3rd Flow Control rank, forbid carrying out the operation that first blocking-up connects, and continue to detect the input traffic amount of forbidding carrying out after the operation that first blocking-up connects and whether be in less than the state of the product of the described permission flow threshold and the described coefficient of stability and continued described stabilization time; If judged result for being, forbids carrying out the operation of the second blocking-up connection.
7. a volume control device is characterized in that, comprising:
The flow acquisition module is used to obtain the input traffic amount and the dateout flow of the network equipment;
The rank acquisition module is used for obtaining the Flow Control rank of the described network equipment according to described input traffic amount, described dateout flow and at least one predetermined threshold value;
Executive Module is used to carry out the control operation of described Flow Control rank corresponding flow, to carry out flow control.
8. volume control device according to claim 7 is characterized in that, described rank acquisition module comprises:
Obtain submodule, be used to obtain the difference of described input traffic amount and described dateout flow;
Comparison sub-module is used for first predetermined threshold value of described difference and described at least one predetermined threshold value and second predetermined threshold value in described at least one predetermined threshold value are compared;
First determines submodule, is used in described difference determining that greater than 0 and when being less than or equal to described first predetermined threshold value described Flow Control rank is the first-class control rank;
Second determines submodule, is used in described difference determining that greater than described first predetermined threshold value and when being less than or equal to described second predetermined threshold value described Flow Control rank is the second Flow Control rank;
The 3rd determines submodule, is used for during greater than described second predetermined threshold value, determining that described Flow Control rank is the 3rd Flow Control rank in described difference.
9. volume control device according to claim 8 is characterized in that, described Executive Module comprises:
The first-class control submodule is used for when described Flow Control rank is the first-class control rank, described input traffic amount is carried out packet loss handle, to carry out flow control;
The second Flow Control submodule is used for when described Flow Control rank is the second Flow Control rank, described input traffic amount is carried out packet loss handle, and carry out the operation that first blocking-up connects, to carry out flow control;
The 3rd Flow Control submodule is used for when described Flow Control rank is the 3rd Flow Control rank, described input traffic amount is carried out packet loss handle, and carry out the operation that first blocking-up connects, and carry out the operation that second blocking-up connects, to carry out flow control.
10. volume control device according to claim 9 is characterized in that, the described second Flow Control submodule comprises:
The first packet loss unit is used for that described input traffic amount is carried out packet loss and handles;
Judging unit is used for setting up information according to the connection of record, judges that whether the quantity that has connected is greater than the default sum that connects;
First blocking unit is used in the judged result of described judging unit when being, describedly connects connecting of sum and blocks at random exceeding;
Second blocking unit is used in the judged result of described judging unit for not the time, according to the packet loss amount of the described first packet loss unit described having connected is sorted, and begins described having connected blocked from connecting of packet loss amount maximum;
Described the 3rd Flow Control submodule comprises:
The second packet loss unit is used for that described input traffic amount is carried out packet loss and handles;
Discarding unit is used to abandon that client sends newly sets up the connection requests message, desires to connect with blocking-up;
The 3rd blocking unit is used for the current input traffic amount that has connected is added up from small to large successively, and blocking-up makes input traffic amount sum the connecting greater than default permission flow threshold of obtaining.
11. according to Claim 8 or 9 or 10 described volume control devices, it is characterized in that, also comprise:
Detection module is used for after described Executive Module carries out flow control, detects described input traffic amount;
Judge module is used to judge whether described input traffic amount is in less than the state of the default product that allows the flow threshold and the default coefficient of stability and has continued default stabilization time, and the described coefficient of stability is greater than 0 and be less than or equal to 1;
Adjusting module is used in described judged result when being, according to the described Flow Control rank of carrying out before the flow control, adjusts current flow control and operates, to carry out flow control.
12. volume control device according to claim 11 is characterized in that, described adjusting module comprises:
First forbids submodule, when being used for described Flow Control rank before carrying out flow control and being the first-class control rank, forbids that described input data are carried out packet loss to be handled;
Second forbids submodule, when being used for described Flow Control rank before carrying out flow control and being the second Flow Control rank, forbids carrying out the operation that first blocking-up connects;
The 3rd forbids submodule, when being used for described Flow Control rank before carrying out flow control and being the 3rd Flow Control rank, forbid carrying out the operation that first blocking-up connects, and continue to detect the input traffic amount of forbidding carrying out after the operation that first blocking-up connects and whether be in less than the state of the product of the described permission flow threshold and the described coefficient of stability and continued described stabilization time, and in judged result when being, forbid carrying out the operation that second blocking-up connects.
13. network equipment that comprises each described volume control device of claim 7-12.
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