CN101582839A - Method, device and system for regulating data traffic - Google Patents
Method, device and system for regulating data traffic Download PDFInfo
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Abstract
The embodiment of the invention provides a method, a device and a system for regulating data traffic. The method comprises the following steps: firstly, receiving bandwidth instruction information used for instructing the transmission bandwidth of a data receiver; then acquiring the transmission bandwidth of the data receiver according to the bandwidth instruction information; and then regulating the data traffic sent to the data receiver according to the acquired transmission bandwidth. Following the steps, the received data traffic can be regulated adaptively according to the change of the data receiver, that is the communication equipment transmission bandwidth, thereby not only the congestion of the internal flow in the communication equipment is avoided and the stability of the service transmission is guaranteed, but also adverse effect brought to the high priority service transmission is avoided and the transmission performance of a system is enhanced.
Description
Technical field
The present invention relates to network communication field, relate in particular to a kind of method, Apparatus and system of regulating data traffic.
Background technology
Present in a lot of communication equipments, can be according to the transmission conditions of communication equipment channel, the transmission bandwidth of real-time adjustment communication equipment is with the variation of adaptive channel condition.Be illustrated in figure 1 as the schematic diagram of communication equipment transmission bandwidth with changes in channel conditions, among the figure: relatively good when the transmission conditions of channel, as in bright day gas condition following time, just can dispose bigger transmission bandwidth, thereby support the transmission work of various service applications; And poor when the transmission conditions of channel, as in the following time of weather condition of heavy rain, just must dispose less transmission bandwidth to adapt to abominable transmission conditions.Under the very little situation of this transmission bandwidth, can guarantee that the transmission of part high-priority service is unaffected by traffic classification and traffic management technology, remaining low priority traffice is dynamic adjustment the along with the variation of channel condition then, for example reduces even stop fully the business transmission of these low priorities.
Yet for the consideration of each side factors such as cost and demand, the traffic classification and the traffic management function of at present a lot of communication equipment inside are also fairly simple, even lack the managerial ability of this respect.Like this after the communication equipment that possesses the bandwidth adjustment function has been adjusted the transmission bandwidth of equipment automatically according to channel condition, owing to be connected to the upstream equipment of this communication equipment, for example data equipment such as outside route switching can't be learnt the change of this communication equipment transmission bandwidth, still can be with former speed to this communication equipment transport service, so just might cause the flow that enters this communication equipment greater than flow that this communication equipment sent out, the buffer memory of this communication equipment internal data bag is increased, even cause flow congestion.
For instance, communications with wireless microwave equipment is an example, be illustrated in figure 2 as the structural representation of ether microwave equipment communications, among the figure: after IP/MPLS (the Internet Protocol/Multi-Protocol Label Switching) business datum that data equipment transmitted of ether microwave equipment (Ethernet MicroWave) reception from the upstream, this business datum is sent from eating dishes without rice or wine by outdoor unit (ODU, Out-Door Unit) and antenna.Channel condition variation when the ether microwave equipment, for example in following time of weather condition of heavy rain, this microwave equipment will automatically switch on the low-grade transmission parameter allocation plan by adaptive modulation technology and work, and then causes the transmission bandwidth of this microwave equipment to have reducing to a certain degree; But owing to be connected to the upstream equipment of this microwave equipment, be IP/MPLS data equipment and this variation of not knowing transmission bandwidth, still carry business datum to this microwave equipment with former speed, will cause like this by ethernet link and enter the flow of this microwave equipment greater than the flow from eating dishes without rice or wine to send by ODU and antenna, the buffer memory water level of interior data bag also can go up gradually, when increasing to a certain degree, will cause the congested of inner stream flow, badly influence the transmission performance of system.
Simultaneously, because the traffic classification and the traffic management function of a lot of communication equipment inside are also fairly simple, even lack such management function, so the priority of miscellaneous service flow might can't be distinguished in communication equipment inside at all, when the buffer memory of communication equipment inside has been occupied by a large amount of lower-priority data messages, the data message of high priority just can only wait for that the lower-priority data message could send after sending, will influence the data of high-priority services transmission like this, cause very big time delay, reduced the transmission performance of system.
In sum, in realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: in the prior art scheme, communication equipment can not so just might cause the congested of inner stream flow accurately according to the received data traffic of the adaptive adjusting of the variation of self transmission bandwidth; Also can bring influence simultaneously, reduce the transmission performance of system the business transmission of high priority.
Summary of the invention
Embodiment of the present invention technical problem to be solved is to provide a kind of method, Apparatus and system of regulating data traffic, can be according to the received data traffic of this communication equipment of the adaptive adjusting of the variation of communication equipment transmission bandwidth, guaranteed the stability of professional transmission, also avoid simultaneously the adverse effect that transmission brings to high-priority service, improved the transmission performance of system.
Embodiment of the present invention is achieved through the following technical solutions:
A kind of method of regulating data traffic comprises:
Receive the bandwidth indication information, described bandwidth indication information is used for designation data recipient's transmission bandwidth;
According to described bandwidth indication information, know described data receiver's transmission bandwidth;
According to described data receiver's transmission bandwidth, regulate and mail to described data receiver's data traffic.
Embodiment of the present invention also provides a kind of data sink, and described device comprises:
The frame expanding element is used for ethernet frame is defined expansion, and the bandwidth indication information is set in the ethernet frame after expansion, and described bandwidth indication information is used to indicate the transmission bandwidth of described data sink;
The indication information transmitting element is used to send described bandwidth indication information.
Embodiment of the present invention also provides a kind of data sending device, comprising:
The indication information receiving element is used to receive the bandwidth indication information that includes the data sink transmission bandwidth, and described bandwidth indication information is carried on the expansion of ethernet frame;
Expand the frame recognition unit, be used to discern the expansion of described ethernet frame, obtain described bandwidth indication information, and, know the transmission bandwidth of described data sink according to described bandwidth indication information;
Flow regulating unit is used for according to the transmission bandwidth of being known, regulates the data traffic that mails to described data sink.
Embodiment of the present invention also provides a kind of data transmission system, and described system comprises data sending device and data sink, wherein:
Comprise frame expanding element and indication information transmitting element in the described data sink,
Described frame expanding element is used for ethernet frame is defined expansion, and the bandwidth indication information is set in the ethernet frame after expansion, and described bandwidth indication information is used to indicate the transmission bandwidth of described data sink;
Described indication information transmitting element is used to send described bandwidth indication information to described data sending device.
By the above-mentioned technical scheme that provides as can be seen, at first receive the bandwidth indication information, described bandwidth indication information is used for designation data recipient's transmission bandwidth; According to described bandwidth indication information, know data receiver's transmission bandwidth then; According to the transmission bandwidth of being known, regulate and mail to described data receiver's data traffic again.According to such operating procedure, just can be according to the data receiver, the received data traffic of the adaptive adjusting of the variation of communication equipment transmission bandwidth has just been avoided the congested of communication equipment inner stream flow, has guaranteed the stability of professional transmission; Also avoid simultaneously the adverse effect that transmission brings to high-priority service, improved the transmission performance of system.
Description of drawings
Fig. 1 is the schematic diagram of communication equipment transmission bandwidth with changes in channel conditions;
Fig. 2 is the structural representation of ether microwave equipment communications;
Fig. 3 is the schematic flow sheet of the described regulating data traffic method of embodiment of the present invention;
Fig. 4 is common OAM frame structure schematic diagram;
Fig. 5 is the OAM frame structure schematic diagram after the expansion in the specific embodiment of the invention;
Fig. 6 is the structural representation of regulating data traffic in the specific embodiment of the invention;
Fig. 7 is the structural representation of the described data sink of embodiment of the present invention;
Fig. 8 is the structural representation of the described data sending device of embodiment of the present invention;
Fig. 9 is the schematic flow sheet of the described data transmission system of embodiment of the present invention.
Embodiment
Embodiment of the present invention provides a kind of method, Apparatus and system of regulating data traffic.Data receiver in the communication system can adopt real-time and/or periodic mode to send the bandwidth indication information to its upstream equipment, includes data receiver's transmission bandwidth information in the described bandwidth indication information, i.e. available bandwidth; Upstream equipment then, just data receiver according to this bandwidth indication information, just can be known data receiver's transmission bandwidth information after receiving this bandwidth indication information; This moment, data receiver just can be carried out adapt to the data traffic that sends to described data receiver, made the current transmission bandwidth of itself and data receiver suitable.By such Flow-rate adjustment mode, just avoided the congested of data receiver's inner stream flow, guaranteed the stability of professional transmission; Simultaneously because data receiver can be utilized abundant traffic classification and the traffic management function that self possesses, selection abandons the variation of the data traffic of part low priority with adaptive external transmission bandwidth, so also just avoided the adverse effect that transmission brings to high-priority service, guarantee the stable transfer of high-priority traffic amount, thereby improved the transmission performance of system.
In addition, the adjusting that the above data receiver is carried out the data flow, can utilize integrated software to carry out the adaptation procedure of Flow-rate adjustment, also can finish automatically by independent functional entity, Application Specific Integrated Circuit (ASIC for example, Application Specific Integrated Circuit) or field programmable gate array hardware entities such as (FPGA, Field Programmable Gate Array) finish.
For better describing embodiment of the present invention, now in conjunction with the accompanying drawings the specific embodiment of the present invention is described, be illustrated in figure 3 as the schematic flow sheet of described regulating data traffic method, described method comprises:
Step 31: receive the bandwidth indication information.
Can be to come the information that the data recipient is sent is monitored specifically by specific functional module, after the data receiver sends the bandwidth indication information, specific functional module receives this bandwidth indication information, and it is passed to data receiver, this bandwidth indication information is used for designation data recipient's transmission bandwidth.Certainly, above-described specific functional module also can directly be integrated in the data receiver, is come the information that the data recipient is sent is monitored by data receiver.
The bandwidth indication information that above data receiver sent can be to having self-defined that ethernet frame carries out now, as long as data receiver and data receiver can both discern this self-defining ethernet frame, just can meet the demands, for example can expand operation management maintain frame (OAM frame), described bandwidth indication information is arranged in the data field in the described operation management maintain frame, and makes data receiver and data receiver can both discern the expansion that this operation management maintain frame is carried out.
Can comprise information such as type field, length field, information rate territory and burst length territory in the bandwidth indication information of being expanded, described type field is used to identify the type of described bandwidth indication information; Described length field is used to indicate the length of described bandwidth indication information; Described information rate territory is used to the transmission bandwidth of indicating described data receiver current; And described burst length territory is to be used in reference to be shown in the Maximum Burst Size that allows under the current transmission bandwidth, and its unit generally uses byte (byte) to represent.
In addition, in the bandwidth indication information of above-mentioned expansion, also can comprise the speed grade territory, described speed grade territory is the grade that is used to indicate described data receiver's current transmission bandwidth, just can know corresponding transmission bandwidth value and Maximum Burst Size value by the grade that this speed grade territory is indicated.
In addition, except that can comprising above information, can also comprise the field of awareness of failing to be sold at auction in described bandwidth indication information, the described field of awareness of failing to be sold at auction is to be used for when the data traffic that is in same transmission bandwidth is divided into some groups of set, identifies the applied data traffic set of described bandwidth indication information.
Be illustrated with the expansion that operation management maintain frame (OAM frame) is carried out below, be illustrated in figure 4 as common OAM frame structure schematic diagram, among the figure: Destination Address is used to represent destination address, as the 01-80-c2-00-00-02 that identifies among the figure; Source Address is used to represent source address; What Length/Type represented is the length/type of frame; What Subtype represented is slow protocol subtype; Flag F lags territory is used to indicate variety of protocol state and some emergencies; Code word Code territory is used to identify the OAM Protocol Data Unit of particular type, for example loopback, MIB access request or emergency indication etc.; The FCS territory is used for representing the redundancy check mechanism of frame; Above part all is the content that is comprised in the common OAM frame structure.
Be in this example on the basis of above-mentioned OAM frame structure, data Data territory is expanded accordingly that when expanding, the numerical value in corresponding code word Code territory is 0xFE, expression has been carried out the expansion of particular case to the OAM frame.Be illustrated in figure 5 as the OAM frame structure schematic diagram after the expansion, among the figure: preceding 3 bytes in data Data territory are the unified identifier OUI of tissue, and the form of the remainder of data field expansion and the numerical value that function just depends on concrete OUI; Wherein, the extend information of remainder can comprise:
Type Type territory is used to identify the type of this bandwidth indication information, and its length can be 1 byte.
Length L ength territory, being used for the byte is the length that unit indicates this bandwidth indication information, the length of this length field also can be 1 byte.
Speed grade Class of Rate territory is used for the grade of the current available transmission bandwidth of identification data recipient, and the length in this territory can be 1 byte.
Information rate Information Rate territory is used for the current maximum transmission bandwidth of designation data recipient, and unit is bits per second bit/s, and the length in this territory can be 4 bytes.
Burst length Burst Size territory is used in reference to and is shown in the Maximum Burst Size that allows under the current transmission bandwidth, and its unit is byte byte, and the length in this territory also can be 4 bytes.
Except comprising above-described information field, can also comprise a traffic identifier Traffic ID territory, the described field of awareness of failing to be sold at auction is used for identifying the applied Business Stream set of this bandwidth indication information.Under some scene, may need the flow in the same link is divided into several set, if being unit with the group, bandwidth adjustment independently carries out, just can gather by concrete Business Stream by that the field of awareness of failing to be sold at auction indicates this moment; If need not carry out bandwidth adjustment based on group, the value of this field of awareness of failing to be sold at auction can be set to 0 so, shows the complete or collected works of all flows effective.
After according to above extended mode the OAM frame being expanded, when data receiver's transmission bandwidth changes, the data receiver just can send the OAM frame after this expansion, comprises the bandwidth indication information of described data receiver's current transmission bandwidth in the OAM frame after the described expansion; And data receiver just can receive this bandwidth indication information by specific functional module, and carries out successor operation.
Step 32:, know data receiver's transmission bandwidth according to described bandwidth indication information.
Be exactly after data receiver receives the bandwidth indication information by specific functional module, just can know data receiver's transmission bandwidth specifically by resolving this bandwidth indication information.
Step 33:, regulate and mail to described data receiver's data traffic according to described transmission bandwidth.
Be exactly specifically, know data receiver's transmission bandwidth in data receiver after, just can regulate the data traffic that self mails to the data receiver, the current transmission bandwidth of this data traffic and data receiver is adapted.
The method of specifically regulating can be by reconfiguring the grade of service qos parameter relevant with transfer of data, regulating the data traffic that sends to described data receiver, to adapt to the current transmission bandwidth of described data receiver.For example can abandon according to data traffic priority order from low to high, the data traffic of low priority is discarded, the preferential transmission that guarantees the high-priority traffic amount, can adapt to the current transmission bandwidth of data receiver so that send to data receiver's data traffic like this, can make the data traffic of high priority obtain the bandwidth assurance all the time again.
By the enforcement of above operating procedure, just avoided the congested of data receiver's inner stream flow, guaranteed the stability of professional transmission; Simultaneously because data receiver can be utilized abundant traffic classification and the traffic management function that self possesses, selection abandons the variation of the data traffic of part low priority with adaptive external transmission bandwidth, so also just avoided the adverse effect that transmission brings to high-priority service, guarantee the stable transfer of high-priority traffic amount, thereby improved the transmission performance of system.
In addition, above-described bandwidth indication information can initiatively be sent by the data receiver when data receiver's transmission bandwidth changes; Also can be with one regular time gap periods transmission, with the regular time current transmission bandwidth of reported data recipient at interval.
Above-described data receiver can be the transmission equipment that possesses the Adaptive Modulation function, for example ether microwave equipment etc.Be the ether microwave equipment below with data receiver, data receiver is an example for the IP/MPLS equipment that links to each other with the ether microwave equipment, and the process of bandwidth adjustment is elaborated:
Be illustrated in figure 6 as the structural representation of regulating data traffic in the present embodiment, among the figure:
In process 1: the data receiver, it for example can be the propagation conditions that the ether microwave equipment constantly monitors microwave channel in real time, when channel condition generation deterioration and when causing signal to noise ratio to be reduced to a predefined threshold value, the work of getting on of will switch to the built-in Adaptive Modulation engine of data receiver a more low-grade modulation and coded system, this will cause data receiver's current transmission bandwidth to reduce accordingly.
In process 2: the data receiver can send the bandwidth indication information to the data receiver interconnected with it, and data receiver described here can be an IP/MPLS equipment, comes the notification data transmit leg to reduce the data traffic that sends by this bandwidth indication information.Described bandwidth indication information can be according to the expansion of above method to the OAM frame, also can be the message frame or the message of other forms of transmission similar information, for example can carry out self-defined accordingly to existing ethernet frame, as long as data receiver and data receiver can both discern this self-defining ethernet frame, just can meet the demands.
In process 3: data receiver receives and resolves this bandwidth indication information, knows the transmission bandwidth of the current maximum of data receiver; According to this maximum transmission bandwidth, regulate the data traffic that self sends to the data receiver then, the current transmission bandwidth of this data traffic and described data receiver is adapted.
Specifically can be by reconfiguring the grade of service qos parameter relevant, as the CIR/CBS parameter of port level Shaping, to adapt to new transmission bandwidth with transfer of data.Utilize corresponding qos parameter and scheduling mechanism, the part low priority data traffic will be dropped, data traffics such as 3G R99 PS that for example priority is lower or HSDPA, and transmission bandwidth reduces manyly more, just has more low priority data traffic to be dropped; Yet, those high-priority traffic amounts, for example data traffic such as 2G or 3G R99 CS can obtain the bandwidth assurance all the time.Thereby just avoided the congested of data receiver's inner stream flow, guaranteed the stability of professional transmission; Abundant traffic classification and the traffic management function that can utilize data receiver self to possess again, selection abandons the data traffic of part low priority to adapt to the variation of external transmission bandwidth, guarantee the stable transfer of high-priority traffic amount, improved the transmission performance of system.
Above-described bandwidth indication information can adopt in real time and send with the mode that periodically combines.Generally, the bandwidth indication information is with a fixing blanking time, and for example per second once periodically sends; When data receiver's transmission bandwidth changed, a bandwidth indication information that comprises current transmission bandwidth information will be sent out in real time, so that the notification data transmit leg starts sending the adjustment of data traffic.
Embodiment of the present invention also provides a kind of data sink, is illustrated in figure 7 as the structural representation of the described data sink of embodiment of the present invention, and described device comprises frame expanding element 71 and indication information transmitting element 72, wherein:
Described frame expanding element 71 is used for ethernet frame is defined expansion, the bandwidth indication information is set in the ethernet frame after expansion, described bandwidth indication information is used to indicate the transmission bandwidth of described data sink, and the mode of concrete definition expansion is as above described in the method execution mode.
Described indication information transmitting element 72 is used to send described bandwidth indication information.Wherein, when the transmission bandwidth of described data sink changed, described indication information transmitting element 72 sent described bandwidth indication information; Or, described indication information transmitting element 72 also can one regular time gap periods the described bandwidth indication information of transmission; Or adopt above dual mode to combine to send.
Above-described frame expanding element 71 specifically can be an operation management maintain frame expanding element 711, described operation management maintain frame expanding element 711 is used for the operation management maintain frame is expanded, in the data field of the operation management maintain frame after expansion the bandwidth indication information is set, described bandwidth indication information is used to indicate the transmission bandwidth of described data sink.
The above data sink specifically can be the ether microwave equipment that possesses the Adaptive Modulation function.
Embodiment of the present invention also provides a kind of data sending device, be illustrated in figure 8 as the structural representation of the described data sending device of embodiment of the present invention, described device comprises indication information receiving element 81, expansion frame recognition unit 82 and flow regulating unit 83, wherein:
Described indication information receiving element 81 is used to receive the bandwidth indication information that includes the data sink transmission bandwidth, and described bandwidth indication information is carried on the expansion of ethernet frame.
Described expansion frame recognition unit 82 is used to discern the expansion of described ethernet frame, obtains described bandwidth indication information, and according to described bandwidth indication information, knows the transmission bandwidth of described data sink.
Described flow regulating unit 83 is used for according to the transmission bandwidth of being known, regulates the data traffic that mails to described data sink.The method of specifically regulating can be by reconfiguring the grade of service qos parameter relevant with transfer of data, regulating the data traffic that sends to described data receiver, to adapt to the current transmission bandwidth of described data receiver; Also can abandon according to data traffic priority order from low to high, the data traffic of low priority is discarded, the preferential transmission that guarantees the high-priority traffic amount, can adapt to the current transmission bandwidth of data receiver so that send to data receiver's data traffic like this, can make the data traffic of high priority obtain the bandwidth assurance all the time again.
Embodiment of the present invention also provides a kind of data transmission system, is illustrated in figure 9 as the structural representation of the described system of embodiment of the present invention, and described system comprises data sending device and data sink, wherein:
Comprise frame expanding element and indication information transmitting element in the described data sink,
Described frame expanding element is used for ethernet frame is defined expansion, and the bandwidth indication information is set in the ethernet frame after expansion, and described bandwidth indication information is used to indicate the transmission bandwidth of described data sink.
Described indication information transmitting element is used to send described bandwidth indication information to described data sending device.
In addition, comprise indication information receiving element, expansion frame recognition unit and flow regulating unit in the described data sending device, wherein:
Described indication information receiving element is used to receive the bandwidth indication information that includes described data sink transmission bandwidth, and described bandwidth indication information is carried on the expansion of ethernet frame;
Described expansion frame recognition unit is used to discern the expansion of described ethernet frame, obtains described bandwidth indication information, and according to described bandwidth indication information, knows the transmission bandwidth of described data sink;
Described flow regulating unit is used for according to the transmission bandwidth of being known, regulates the data traffic that mails to described data sink.
In sum, embodiment of the present invention can be avoided the congested of data receiver's inner stream flow, guarantees the stability of professional transmission; Simultaneously because data receiver can be utilized abundant traffic classification and the traffic management function that self possesses, selection abandons the variation of the data traffic of part low priority with adaptive external transmission bandwidth, so also avoided the adverse effect that transmission brings to high-priority service, guarantee the stable transfer of high-priority traffic amount, thereby improved the transmission performance of system.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (14)
1, a kind of method of regulating data traffic is characterized in that,
Receive the bandwidth indication information, described bandwidth indication information is used for designation data recipient's transmission bandwidth;
According to described bandwidth indication information, know described data receiver's transmission bandwidth;
According to described data receiver's transmission bandwidth, regulate and mail to described data receiver's data traffic.
2, the method for claim 1 is characterized in that,
Described bandwidth indication information is arranged in the data field of operation management maintain frame.
3, method as claimed in claim 1 or 2 is characterized in that, described bandwidth indication information comprises:
Type field is used to identify the type of described bandwidth indication information;
Length field is used to indicate the length of described bandwidth indication information;
The information rate territory, the transmission bandwidth that is used to indicate described data receiver;
The burst length territory is used in reference to and is shown in the Maximum Burst Size that allows under the current transmission bandwidth.
4, method as claimed in claim 3 is characterized in that, described bandwidth indication information also comprises:
The speed grade territory is used to indicate the grade of described data receiver's transmission bandwidth;
The field of awareness of failing to be sold at auction is used for when the data traffic that is in same transmission bandwidth is divided into some groups of set, identifies the applied data traffic set of described bandwidth indication information.
5, the method for claim 1 is characterized in that, described data receiver's data traffic is mail in described adjusting, specifically comprises:
By reconfiguring the grade of service qos parameter relevant with transfer of data, the data traffic of regulating described data receiver is to adapt to described data receiver's transmission bandwidth.
6, the method for claim 1 is characterized in that, described data receiver's data traffic is mail in described adjusting, specifically comprises:
Select according to data traffic priority order from low to high, abandon the data traffic of low priority, and guarantee the transmission of high-priority traffic amount.
7, the method for claim 1 is characterized in that, described reception bandwidth indication information is specially:
When data receiver's transmission bandwidth changes, receive the bandwidth indication information that comprises described data receiver's transmission bandwidth.
8, the method for claim 1 is characterized in that, described reception bandwidth indication information is specially:
With one regular time gap periods reception comprise the bandwidth indication information of described data receiver's transmission bandwidth.
9, a kind of data sink is characterized in that, described device comprises:
The frame expanding element is used for ethernet frame is defined expansion, and the bandwidth indication information is set in the ethernet frame after expansion, and described bandwidth indication information is used to indicate the transmission bandwidth of described data sink;
The indication information transmitting element is used to send described bandwidth indication information.
10, data sink as claimed in claim 9 is characterized in that, described frame expanding element is specially:
Operation management maintain frame expanding element is used for the operation management maintain frame is expanded, and in the data field of the operation management maintain frame after expansion the bandwidth indication information is set, and described bandwidth indication information is used to indicate the transmission bandwidth of described data sink.
11, as claim 9 or 10 described data sinks, it is characterized in that described data sink is specially: the ether microwave equipment that possesses the Adaptive Modulation function.
12, a kind of data sending device is characterized in that, comprising:
The indication information receiving element is used to receive the bandwidth indication information that includes the data sink transmission bandwidth, and described bandwidth indication information is carried on the expansion of ethernet frame;
Expand the frame recognition unit, be used to discern the expansion of described ethernet frame, obtain described bandwidth indication information, and, know the transmission bandwidth of described data sink according to described bandwidth indication information;
Flow regulating unit is used for according to the transmission bandwidth of being known, regulates the data traffic that mails to described data sink.
13, a kind of data transmission system is characterized in that, described system comprises data sending device and data sink, wherein:
Comprise frame expanding element and indication information transmitting element in the described data sink,
Described frame expanding element is used for ethernet frame is defined expansion, and the bandwidth indication information is set in the ethernet frame after expansion, and described bandwidth indication information is used to indicate the transmission bandwidth of described data sink;
Described indication information transmitting element is used to send described bandwidth indication information to described data sending device.
14, system as claimed in claim 13 is characterized in that, comprises indication information receiving element, expansion frame recognition unit and flow regulating unit in the described data sending device, wherein:
Described indication information receiving element is used to receive the bandwidth indication information that includes described data sink transmission bandwidth, and described bandwidth indication information is carried on the expansion of ethernet frame;
Described expansion frame recognition unit is used to discern the expansion of described ethernet frame, obtains described bandwidth indication information, and according to described bandwidth indication information, knows the transmission bandwidth of described data sink;
Described flow regulating unit is used for according to the transmission bandwidth of being known, regulates the data traffic that mails to described data sink.
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