CN101686177A - Dynamic bandwidth allocation method, equipment and system of multi-service transport network - Google Patents
Dynamic bandwidth allocation method, equipment and system of multi-service transport network Download PDFInfo
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- H04Q11/00—Selecting arrangements for multiplex systems
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- H04Q11/0062—Network aspects
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- H04Q11/00—Selecting arrangements for multiplex systems
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Abstract
The invention discloses dynamic bandwidth allocation method, equipment and system of a multi-service transport network. The method comprises the following steps: obtaining bandwidth request information of T-CONT frames of all transmission containers in a data frame for transmitting multi-type services; allocating the bandwidth of all T-CONT frames according to the bandwidth request information andthe set bandwidth allocation algorithm; and sending the bandwidth allocation information to nodes in the multi-service transport network. By using the invention, different types of services can sharethe channel bandwidth, the bandwidth utilization ratio is improved, and the service quality is ensured.
Description
Technical field
The present invention relates to data communication technology, be specifically related to a kind of distribution method of dynamic bandwidth, equipment and system of multi-service transmitting network.
Background technology
Along with the development of the network communications technology, existing network can carry multiple business, as voice, video, online game, network browsing etc.In recent years, network bandwidth requirements increases with index law, though the operator by constantly expanding band width in physical and correlation technique, has improved the network carrying and transmitted the ability of data, the increase of band width in physical always lags behind the requirement of user for transfer of data.Under the impact of big data quantity, how to guarantee the reliability of network carrying multiple business transmission and the QoS (Quality ofService, service quality) of corresponding service, carried out a lot of research work.Over the past two years, each big telecommunications operator has mostly selected (the Gigabit-Passive Optical Network with GPON, gigabit passive optical network) inserts (FTTx as following big band optical fiber, Fiber To The Building/Cabinet/Curb/Home, the access of various ways such as Fiber To The Building, roadside rack, family) solution.On the one hand, the bandwidth of MAN is had higher requirement, on the other hand, require MAN to possess the ability of docking, support the development of following FTTx with GPON.
Present MAN, NG-SDH (Next Generation Synchronous DigitalHierarchy is arranged, synchronous digital hierarchy of future generation), Metro-WDM (Metro Wavelength DivisionMultiplexing, metropolitan area wavelength division multiplexing), 2 layers of various ways such as Ethernet.In realizing process of the present invention, the inventor finds that there is following problem at least in existing MAN: do not have real-time dynamic bandwidth to adjust mechanism, network bandwidth utilance is low, there is not strict QoS to guarantee, BOD (Bandwidth OnDemand, the bandwidth on-demand) business of big bandwidth is difficult to satisfy.In a word, press in the prior art a kind of simple relatively, can carry following multiple business, realize Dynamic Bandwidth Allocation, the guaranteed Data-carrying of miscellaneous service QoS demand and transmission technology easily.
Summary of the invention
The embodiment of the invention provides a kind of distribution method of dynamic bandwidth, equipment and system of multi-service transmitting network, to solve the problem of multi-service transmitting network dynamic shared channel bandwidth of different kinds of business when two-forty and the long Distance Transmission, improve bandwidth availability ratio, guarantee the service quality of different kinds of business simultaneously.
The embodiment of the invention provides a kind of distribution method of dynamic bandwidth of multi-service transmitting network, comprising:
Obtain the bandwidth request information of all transmission container T-CONT frames in the Frame that transmits the polymorphic type business;
The bandwidth of distributing each T-CONT frame according to the bandwidth allocation algorithm of described bandwidth request information and setting;
Send bandwidth allocation information to each node in the multi-service transmitting network.
The embodiment of the invention provides a kind of dynamic bandwidth allocation apparatus of multi-service transmitting network, comprising:
The solicited message acquiring unit is used for obtaining the bandwidth request information of all transmission container T-CONT frames of Frame of transmission polymorphic type business;
The allocated bandwidth unit is used for distributing according to the bandwidth allocation algorithm of bandwidth request information and setting the bandwidth of each T-CONT frame;
The assignment information transmitting element, the bandwidth that is used for distributing according to described allocated bandwidth unit sends bandwidth allocation information each node to multi-service transmitting network.
The embodiment of the invention provides a kind of apparatus for network node, comprising:
Monitoring means is used to monitor the actual bandwidth demand of local T-CONT frame to be sent;
The solicited message generation unit is used for producing bandwidth request information according to the bandwidth request information generation rule of actual bandwidth demand and setting;
The solicited message transmitting element is used to send described bandwidth request information.
The embodiment of the invention provides a kind of multi-service transmitting network system, comprising: dynamic bandwidth allocation apparatus and a plurality of apparatus for network node; Described apparatus for network node, be used to monitor the actual bandwidth demand of this locality T-CONT frame to be sent, bandwidth request information generation rule according to actual bandwidth demand and setting produces bandwidth request information, and described bandwidth request information is sent to described dynamic bandwidth allocation apparatus;
Described dynamic bandwidth allocation apparatus is used for the bandwidth that the bandwidth allocation algorithm according to the bandwidth request information of described apparatus for network node and setting distributes each T-CONT frame, and sends bandwidth allocation information to each apparatus for network node node.
The technical scheme that is provided by the above embodiment of the invention as can be seen, the distribution method of dynamic bandwidth of the multi-service transmitting network of the embodiment of the invention, equipment and system, bandwidth request information by all T-CONT frames in the Frame that obtains transmission polymorphic type business, the bandwidth of distributing each T-CONT frame according to the bandwidth allocation algorithm of setting, send bandwidth allocation information to each node in the multi-service transmitting network, thereby can make each node obtain described bandwidth allocation information, and according to described bandwidth allocation information transmission and reception T-CONT frame, realized the Dynamic Bandwidth Allocation of multi-service transmission network, make dynamically shared channel bandwidth of different kinds of business, improve bandwidth availability ratio, guaranteed QoS simultaneously.
Description of drawings
Fig. 1 is the data frame structure schematic diagram of transmission polymorphic type business in the embodiment of the invention;
Fig. 2 is the realization flow figure of the distribution method of dynamic bandwidth of embodiment of the invention multi-service transmitting network;
Fig. 3 is an allocated bandwidth flow chart in this embodiment of the invention;
Fig. 4 is the structural representation of the dynamic bandwidth allocation apparatus of embodiment of the invention multi-service transmitting network;
Fig. 5 is the structural representation of embodiment of the invention apparatus for network node.
Embodiment
In order to make those skilled in the art person understand the scheme of the embodiment of the invention better, the embodiment of the invention is described in further detail below in conjunction with drawings and embodiments.Apparently, the accompanying drawing in describing below only 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.
The distribution method of dynamic bandwidth of multi-service transmitting network is based on the transmission of the data frame structure in multi-service transmitting network data, adopt the method for centralized calculation, come dynamic assignment channel width according to the quantity and the length of the T-CONT frame of the practical business flow control node of node.The method of described centralized calculation can be by placing DBA (Dynamic Bandwidth Assignment in multi-service transmitting network, Dynamic Bandwidth Allocation) module is finished, and this DBA module can be placed in the host node equipment in the multi-service transmitting network or be placed on network management system inside.The distribution method of dynamic bandwidth of the multi-service transmitting network of the embodiment of the invention can be used for various network topologies.
For the ease of understanding the scheme of the embodiment of the invention, below simply introduce earlier data frame structure in the multi-service transmitting network.
As shown in Figure 1, be the data frame structure schematic diagram of transmission polymorphic type business in the embodiment of the invention:
This Frame has fixing frame rate and fixing frame length, frame rate for example be 8000 frame/seconds, frame length for example be 125 μ s.Comprise overhead area and data payload area two parts in each Frame, comprise frame synchronization field and management information territory in the overhead area, OAM (the Operation that the transmission of described management information territory is used for network operation, administers and maintains, Administration, Management, Operations,Administration And Maintenance) information, satisfy network management reliability and security requirement, and the positional information of T-CONT (transmission container) frame of transmission key, this information indication T-CONT frame starting and ending position in Frame.
Data frame structure based on this transmission polymorphic type business, can define bandwidth unit is the minimum particle size of distributing bandwidth in the network, one or more successive bytes in the Frame are formed a bandwidth unit, and the byte number that bandwidth unit comprises is consulted to determine or disposed by network management system by each node in the network.Like this, the payload user data district of the T-CONT frame in the multi-service transmitting network is made up of an integer bandwidth unit.
As shown in Figure 2, be the realization flow of the distribution method of dynamic bandwidth of embodiment of the invention multi-service transmitting network, mainly may further comprise the steps:
Each node is monitored the actual bandwidth demand of this locality T-CONT frame to be sent in the network; Produce bandwidth request information and send to DBA module in the multi-service transmitting network according to the bandwidth request information generation rule of actual bandwidth demand and setting.
The bandwidth request information generation rule of described setting comprises: if the T-CONT frame of unassigned bandwidth is arranged, then produce bandwidth request information; And/or, if distributed the actual bandwidth demand of the T-CONT frame of bandwidth to surpass, then produce bandwidth request information for the bandwidth of described T-CONT frame distribution or above preset threshold.
Like this, described bandwidth request information will comprise: the newly-increased bandwidth demand information of having distributed the T-CONT frame of the actual bandwidth changes in demand information of T-CONT frame of bandwidth and/or unassigned bandwidth.
The bandwidth request information that each node produces this locality sends by the cycle of setting by the bandwidth request information transmission channel.Described bandwidth information transmission channel can be provided with in the load zones of Frame, also can be in the control channel of transmission network control and management information equipment.A kind of simple realization is to specify a T-CONT frame to be used to transmit the bandwidth request information of all nodes.Described bandwidth request information sends the cycle by the unified negotiation of each node or by the unified configuration of webmaster, guarantees the transmission cycle unanimity of each node.
After the DBA module obtains the bandwidth request information of all T-CONT frames in the Frame, calculate, arbitrate and distribute each T-CONT frame bandwidth, the i.e. length of distribution T-CONT frame according to the bandwidth allocation algorithm of setting.
The DBA module sends to each node in the multi-service transmitting network with the subchannel of bandwidth allocation information by transmission bandwidth assignment information in the Frame.The starting and ending position that described bandwidth allocation information comprises the numbering of T-CONT frame and distributes in Frame, the length of the T-CONT frame that can obtain distributing according to the starting and ending position of T-CONT frame.
Like this, each node in the multi-service transmitting network, after the subchannel of transmission bandwidth assignment information obtains described bandwidth allocation information from Frame, can determine that this node sends and receive the position and the length of T-CONT frame according to described bandwidth allocation information, promptly upgrade the T-CONT frame information that this node sends and receives, send according to the position of the T-CONT frame of determining and length then and receive the T-CONT frame, up to receiving new bandwidth allocation information.When node sends data, the rule of data based setting to be sent is fitted within corresponding T-CONT frame, the maximum length of T-CONT frame must be less than or equal to the allocated length of this T-CONT frame in the current bandwidth assignment information.Node receives when being dealt into local T-CONT frame, according to the allocated length reception T-CONT frame of this T-CONT frame in the current bandwidth assignment information.
In data transmission procedure, repeat above step, all transfer of data in all-network finish.
Need to prove, when the T-CONT frame information that upgrades the transmission of this node and receive, need to guarantee that each node upgrades bandwidth allocation information synchronously, promptly the bandwidth allocation information after each node updates all is the subchannel acquisition from the transmission bandwidth assignment information of same Frame.For example, a kind of simple realization is after all nodes are received new bandwidth allocation information for the first time, receives and send the T-CONT frame by new bandwidth allocation information at next Frame.
In multi-service transmitting network, along the direction of propagation of T-CONT frame, node discharges its channel width that takies after receiving the T-CONT frame that is dealt into this node, and the channel width of release can send the use of T-CONT frame for this node and back one node.Adjacent two data between nodes links are called the section of striding, and the initial available bandwidth of the section of striding equals line bandwidth.T-CONT frame is through one or more sections of striding, and the available bandwidth of T-CONT frame equals the minimum value of available bandwidth of all sections of striding of process.
In above-mentioned flow process, the bandwidth that the DBA module need be distributed each T-CONT frame according to the bandwidth allocation algorithm of setting comprises that dynamic adjustment has distributed the length of T-CONT frame of bandwidth and the T-CONT frame allocated length of giving unassigned bandwidth.
In order to improve the bandwidth availability ratio of multi-service transmission network substantially, and the service quality of assurance different kinds of business, in embodiments of the present invention, can classify to the T-CONT frame in advance, and be that each T-CONT frame is set unique numbering and the property parameters of the whole network, the sending node and the receiving node of the minimum length of described property parameters indication T-CONT frame loaded service type, guaranteed bandwidth, T-CONT frame and maximum length, distribution priority, T-CONT frame.The DBA module can obtain the corresponding relation of T-CONT numbering and property parameters by the mode that node reports or network management system directly issues, and it is stored.After the property parameters of a T-CONT frame changes, the DBA module can be received T-CONT numbering and the corresponding property parameters that node reports or network management system directly issues equally, to replace the original attribute of T-CONT frame after the DBA module is received, and redistribute bandwidth for this T-CONT frame so that new property parameters is for referencial use.After the DBA module is received the bandwidth request information of T-CONT frame, determine the type of T-CONT frame, the bandwidth of distributing described T-CONT frame according to the type and the bandwidth allocation algorithm of T-CONT frame according to described bandwidth request information.
The numbering that in above-mentioned bandwidth request information, can comprise the T-CONT frame.Like this, the DBA module just can be determined the type of T-CONT frame according to the numbering of the corresponding relation of the T-CONT that obtains in advance numbering and property parameters and the T-CONT frame in the described bandwidth request information.
In above-mentioned bandwidth request information,, can also comprise the property parameters corresponding with the T-CONT frame except comprising the numbering of T-CONT frame.Such as, when the DBA module is received the bandwidth request information of certain T-CONT frame for the first time, just can directly determine the type of T-CONT frame according to the corresponding relation of numbering of the T-CONT in the described bandwidth request information and property parameters.
Such as, the T-CONT frame can be divided into following three types:
First kind T-CONT frame only carries fixed-bandwidth (FB) business;
The second class T-CONT frame can carry assurance bandwidth (AB) business simultaneously and transmit (BE) business as possible or only carry the AB business;
Utilize a T-CONT frame to carry the professional and BE business of AB simultaneously, not only can improve the line bandwidth utilance, and AB is professional and during the professional bandwidth of sharing the T-CONT frame of BE, even during the variation of BE service bandwidth, does not also need frequently to trigger the calculating and the distribution of DBA module.
The 3rd class T-CONT frame only carries the BE business.
Certainly, the embodiment of the invention is not limited to this mode classification, also can carry out the classification of other modes according to the practical application needs.
Like this, in embodiments of the present invention, the FB business that each node will be gone to same destination is mapped to same T-CONT frame by setting rule, AB and the BE business of going to same destination are mapped to same T-CONT frame by setting rule, the BE business of going to same destination is mapped to same T-CONT frame by setting rule.Each T-CONT frame has the unique numbering of the whole network and one group of property parameters, the sending node and the receiving node of the minimum length of described property parameters indication T-CONT frame loaded service type and guaranteed bandwidth, T-CONT frame and maximum length, distribution priority, T-CONT frame.
When the bandwidth request of a plurality of T-CONT frames of the same type of DBA module single treatment, according to the bandwidth request ordering that distributes priority to the T-CONT frame.
For first kind T-CONT frame, the value of minimum length and maximum length equates that the value of length guarantees to provide the guaranteed bandwidth of bearer service; For the second class T-CONT frame, maximum length is more than or equal to minimum length, and the assurance of the value of minimum length provides the guaranteed bandwidth of all AB business of carrying; For the 3rd class T-CONT frame, maximum length is greater than minimum length, and minimum length can be 0, does not promptly guarantee the bandwidth of bearer service.
In actual applications, data payload area in the Frame of transmission polymorphic type business shown in Figure 1 can be divided into fixed-bandwidth zone and bandwidth varying zone, the fixed-bandwidth zone only comprises the T-CONT frame that belongs to the first kind, and the bandwidth varying zone only comprises the T-CONT frame that belongs to second class; Be preferably all T-CONT frames that belong to the first kind during transfer of data and distribute bandwidth, remaining bandwidth is used for the T-CONT frame that belongs to second class, and the T-CONT framing bit that belongs to second class is after all belong to the T-CONT frame of the first kind.
Before a network node began to receive and sends data, the DBA module at first obtained and preserves employed T-CONT frame number of this node and corresponding property parameters, and each node is preserved numbering and property parameters that self sends the employed T-CONT frame of data; When the property parameters of T-CONT frame changes, the DBA module will discharge the bandwidth of having distributed for this T-CONT frame, be reference with new property parameters during again for this T-CONT frame distribution bandwidth.
Be example with above-mentioned three types T-CONT frame below, describe the process of distributing the bandwidth of each T-CONT frame in the embodiment of the invention according to the bandwidth allocation algorithm of setting in detail.
With reference to Fig. 3, be allocated bandwidth flow process in the embodiment of the invention, mainly may further comprise the steps:
Step 302 is checked the bandwidth request whether first kind T-CONT is arranged in these bandwidth request information; If then execution in step 303; Otherwise, execution in step 304;
In bandwidth request processing procedure to first kind T-CONT frame, need judge bandwidth request successively by the order of setting for all first kind T-CONT frames, whether the available bandwidth of T-CONT frame satisfies the demands, such as sequencing according to the bandwidth request of receiving, T-CONT frame priority treatment to the bandwidth request received earlier, perhaps according to the priority orders of each T-CONT frame, the T-CONT frame priority treatment high to priority.
If can satisfy, the length of distributing this T-CONT frame by the size of this T-CONT frame bandwidth on demand then, and the bandwidth that deduction distributes for this T-CONT frame from the available bandwidth of all sections of striding of this T-CONT frame process are as the available bandwidth of striding Duan Xin;
If can not satisfy, then refuse the bandwidth request of this T-CONT frame, no longer distribute any bandwidth for this T-CONT frame.
Step 304 is checked the bandwidth request whether second class T-CONT frame is arranged in the bandwidth request information; If have, then execution in step 305; Otherwise, execution in step 312;
Step 305 is with the ordering of the bandwidth request of the second class T-CONT frame, such as according to according to the bandwidth request ordering to the T-CONT frame of the sequencing of the bandwidth request of receiving, perhaps according to the bandwidth request ordering to the T-CONT frame of the priority orders of T-CONT frame;
Step 306 to the bandwidth request of the second class T-CONT frame of all unassigned bandwidth, judges whether the available bandwidth of this T-CONT frame satisfies the minimum length demand of this T-CONT frame successively; If then execution in step 307; Otherwise, execution in step 308;
Step 307 deducts the bandwidth of this T-CONT frame minimum length, as the available bandwidth of striding Duan Xin from the available bandwidth of all sections of striding of this T-CONT frame process; Execution in step 309 then;
Step 308 is refused the bandwidth request of this T-CONT frame, does not distribute any bandwidth for this T-CONT frame;
Step 309 judges whether to handle the T-CONT frame of all unassigned bandwidth; If then execution in step 310; Otherwise, execution in step 306;
Step 310 is with the not second class T-CONT frame bandwidth request ordering of refusal;
Step 311 is handled the bandwidth request of all second class T-CONT frames of not refusing;
In the bandwidth request processing procedure to the second class T-CONT frame, whether the bandwidth on demand that need judge the second class T-CONT frame that all are not refused successively by the order of setting is greater than the minimum length of T-CONT frame:
If be not more than, then the length of distributing for this T-CONT frame equals the minimum length of T-CONT frame;
If greater than, illustrate that then this T-CONT frame has carried the professional and BE business (because the assurance of the minimum length value of T-CONT frame provides the carrying bandwidth of all AB business of carrying) of AB simultaneously, bandwidth on demand exceeds the bandwidth demand that minimum length partly is the BE business, choose the section of striding of available bandwidth minimum in all sections of striding of T-CONT frame process, judge all through the BE service bandwidth demand of the T-CONT frame of these sections of striding whether less than the available bandwidth of this section of striding, if less than the allocated length of T-CONT frame would equal the bandwidth on demand of this T-CONT frame, if greater than according to the allocation strategy of setting for this T-CONT frame and through other untreated T-CONT frame distribution bandwidth of this section of striding, after finishing dealing with, the minimum length that all allocated length through the T-CONT frame of these sections of striding equal the T-CONT frame adds the length into the BE service bandwidth demand assignment of this T-CONT frame;
Step 312 is checked the bandwidth request whether the 3rd class T-CONT frame is arranged in the bandwidth request information; If then execution in step 313; Otherwise, execution in step 314;
Step 314 finishes.
Need to prove, the allocation strategy of the setting of mentioning in above-mentioned steps 311 and the step 313, be mainly used in and ensure professional fair allocat bandwidth for BE, specifically can there be several different methods to select, such as can selecting other allocation strategies according to the allocation strategy that in the GPON system is the professional fair allocat bandwidth of BE.
Need to prove, pass through promptly disposing after said process distributes bandwidth for the first time for the T-CONT frame that passes through a plurality of sections of striding, no longer it is repeated allocated bandwidth.By need from available bandwidth, remove the bandwidth of the BE traffic assignments that is this T-CONT frame when other untreated T-CONT frames distribute the BE service bandwidth in the process section of striding.
This shows, the distribution method of dynamic bandwidth of embodiment of the invention multi-service transmitting network is by the mode of centralized calculation, quantity and length according to the T-CONT frame of the practical business flow control node of each node, dynamic assignment channel width effectively flexibly, make the length of T-CONT frame corresponding with its loaded service bandwidth demand, improve bandwidth availability ratio, guaranteed the service quality of different kinds of business simultaneously.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, described storage medium, as: ROM/RAM, magnetic disc, CD etc.
The embodiment of the invention also provides a kind of dynamic bandwidth allocation apparatus of multi-service transmitting network, its structure as shown in Figure 4:
This device comprises: solicited message acquiring unit 401, allocated bandwidth unit 402 and assignment information transmitting element 403.Wherein:
Solicited message acquiring unit 401 is used for obtaining the bandwidth request information that each node transmits all T-CONT frames of Frame of polymorphic type business; Allocated bandwidth unit 402 is used for distributing according to the bandwidth allocation algorithm of bandwidth request information and setting the bandwidth of each T-CONT frame; Assignment information transmitting element 403 is used for sending bandwidth allocation information each node to multi-service transmitting network according to the bandwidth that allocated bandwidth unit 402 distributes.
In this embodiment, can comprise the numbering of T-CONT frame in the described bandwidth request information, each T-CONT frame has the unique numbering of the whole network.Like this, described device also can further comprise: memory cell 404, be used to store the corresponding relation of T-CONT numbering and property parameters, described property parameters comprises the sending node and the receiving node of the minimum length of T-CONT frame loaded service type, guaranteed bandwidth, T-CONT frame and maximum length, distribution priority, T-CONT frame.Memory cell 404 can obtain the corresponding relation of T-CONT numbering and property parameters by the mode that node reports or network management system directly issues.The type of T-CONT frame is determined in allocated bandwidth unit 402 according to the corresponding relation of numbering of the T-CONT in the memory cell 404 and property parameters.
The numbering and the corresponding property parameters that can also comprise in addition, the T-CONT frame in the described bandwidth request information.Like this, the type of T-CONT frame can directly be determined in allocated bandwidth unit 402 according to the corresponding relation of numbering of the T-CONT in the described bandwidth request information and property parameters.
Wherein, allocated bandwidth unit 402 comprises: type is determined subelement 421 and is distributed subelement 422.Wherein, type determines that subelement 421 is used for according to described T-CONT numbering and the corresponding relation of property parameters and the type that described bandwidth request information is determined all T-CONT frames; Distribute subelement 422 to be used for the bandwidth that type and bandwidth allocation algorithm according to all T-CONT frames distribute each T-CONT frame.
Like this, distribute subelement 422 when carrying out allocated bandwidth, bandwidth request for a plurality of dissimilar T-CONT frames, priority according to all types of T-CONT frames is that each T-CONT frame distributes bandwidth, for the bandwidth request of a plurality of T-CONT frames of the same type, be that each T-CONT frame distributes bandwidth according to described distribution priority.
Such as, as the description in the distribution method of dynamic bandwidth of front embodiment of the invention multi-service transmitting network, the T-CONT frame can be divided three classes, bandwidth request for a plurality of dissimilar T-CONT frames, be preferably the first kind and only transmit the T-CONT frame distribution bandwidth of fixed-bandwidth real time business, next is that second class can be transmitted the assurance band width service simultaneously and the forwarding of doing the best is professional or only transmits the T-CONT frame distribution bandwidth that guarantees band width service, is that the 3rd class is only transmitted the professional T-CONT frame distribution bandwidth of forwarding as possible then.
Utilize the dynamic bandwidth allocation apparatus of the multi-service transmitting network of the embodiment of the invention, can be according to the quantity and the length of the T-CONT frame of the practical business flow control node of each node, dynamic assignment channel width effectively makes the length of T-CONT frame corresponding with its loaded service bandwidth demand flexibly.The specific implementation process of allocated bandwidth can not repeat them here referring to the description in the distribution method of dynamic bandwidth of front embodiment of the invention multi-service transmitting network.
The embodiment of the invention also provides a kind of apparatus for network node, its structure as shown in Figure 5:
This apparatus for network node 500 comprises: monitoring means 501, solicited message generation unit 502 and solicited message transmitting element 503 also can further comprise setup unit 504.Wherein:
Monitoring means 501 is used to monitor the actual bandwidth demand of this locality T-CONT frame to be sent; Solicited message generation unit 502 is used for producing bandwidth request information according to the bandwidth request information generation rule of actual bandwidth demand and setting; Solicited message transmitting element 503 is used to send described bandwidth request information; Setup unit 504 is used to set described bandwidth request information generation rule, such as, described bandwidth request information generation rule comprises: if the T-CONT frame of unassigned bandwidth is arranged, then produce bandwidth request information; If and/or the actual bandwidth demand of having distributed the T-CON frame of bandwidth surpasses the bandwidth of distributing for described T-CONT frame or surpass preset threshold, then produce bandwidth request information.
Solicited message transmitting element 503 can send bandwidth request information according to certain cycle, for this reason, in this embodiment, can also comprise negotiation element and/or dispensing unit (not shown).Wherein: described negotiation element is used for consulting to determine that with other nodes bandwidth request information sends the cycle; Described dispensing unit is used to set bandwidth request information and sends the cycle.Like this, solicited message transmitting element 503 just can send bandwidth request information according to the cycle that described negotiation element or described dispensing unit are set.
In the apparatus for network node of this embodiment, can also comprise: assignment information receiving element 505, determining unit 506, data transmission unit 507 and Data Receiving unit 508.Wherein:
Assignment information receiving element 505 is used for obtaining bandwidth allocation information from the subchannel of Frame transmission bandwidth assignment information; Determining unit 506 is used for determining that according to described bandwidth allocation information this node sends and receive the position and the length of T-CONT frame; Data transmission unit 507 is used for sending the T-CONT frame according to the position of the T-CONT frame of determining and length; Data Receiving unit 508 is used for receiving the T-CONT frame according to the position of the T-CONT frame of determining and length.
The apparatus for network node of the embodiment of the invention, can monitor the actual bandwidth demand of this locality T-CONT frame to be sent, and according to the rule generation bandwidth request information of setting, and the bandwidth request information that this locality produces sent to the equipment that carries out allocated bandwidth in the multi-service transmitting network, such as host node equipment or network management device etc.The transmission of described bandwidth request information can be undertaken by the bandwidth request information transmission channel, such as transmitting by Frame or other transmission channel.
After network node receives the bandwidth information of the devices allocation of carrying out allocated bandwidth in the multi-service transmitting network, can determine that this node sends and receive the position and the length of T-CONT frame according to this bandwidth allocation information, and send and receive the T-CONT frame according to the position and the length of the T-CONT frame of determining.Thereby can make the length of T-CONT frame corresponding, improve bandwidth availability ratio, guarantee the service quality of different kinds of business simultaneously with its loaded service bandwidth demand.
The embodiment of the invention also provides a kind of multi-service transmitting network system, comprising: dynamic bandwidth allocation apparatus and a plurality of apparatus for network node; Described apparatus for network node, be used to monitor the actual bandwidth demand of this locality T-CONT frame to be sent, bandwidth request information generation rule according to actual bandwidth demand and setting produces bandwidth request information, and described bandwidth request information is sent to described dynamic bandwidth allocation apparatus; Described dynamic bandwidth allocation apparatus is used for the bandwidth that the bandwidth allocation algorithm according to the bandwidth request information of described apparatus for network node and setting distributes each T-CONT frame, and sends bandwidth allocation information to each apparatus for network node node.
The structure of described dynamic bandwidth allocation apparatus and apparatus for network node can be respectively referring to Fig. 4 and embodiment illustrated in fig. 5 in description, do not repeat them here.
Utilize the multi-service transmitting network system of the embodiment of the invention, can realize that not only multiple services carrying transmits, and can realize the dynamic bandwidth adjustment, in the service quality that guarantees different kinds of business, realize the multiplexing of channel width, bandwidth availability ratio height.Can be according to the actual bandwidth demand of bearer service, open allocated channel bandwidth adapts to following professional demand.
More than the embodiment of the invention is described in detail, used embodiment herein the present invention set forth, the explanation of above embodiment just is used for help understanding system and method for the present invention; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (23)
1, a kind of distribution method of dynamic bandwidth of multi-service transmitting network is characterized in that, comprising:
Obtain the bandwidth request information of all transmission container T-CONT frames in the Frame that transmits the polymorphic type business;
The bandwidth of distributing each T-CONT frame according to the bandwidth allocation algorithm of described bandwidth request information and setting;
Send bandwidth allocation information to each node in the multi-service transmitting network.
2, method according to claim 1 is characterized in that, also comprises:
The actual bandwidth demand of the T-CONT frame that each node monitoring this locality is to be sent;
Bandwidth request information generation rule according to actual bandwidth demand and setting produces bandwidth request information;
Send described bandwidth request information.
3, method according to claim 2 is characterized in that, the bandwidth request information generation rule of described setting comprises:
If the T-CONT frame of unassigned bandwidth is arranged, then produces bandwidth request information; And/or
If distributed the actual bandwidth demand of the T-CON frame of bandwidth to surpass, then produced bandwidth request information for the bandwidth of described T-CONT frame distribution or above preset threshold.
4, method according to claim 2 is characterized in that, sends described bandwidth request information by the bandwidth request information transmission channel; Described bandwidth request information transmission channel is arranged in the load zones of described Frame, perhaps is arranged in the control channel of transmission network control and management information.
5, method according to claim 4 is characterized in that, specifies a T-CONT frame to be used to transmit the bandwidth request information of each node.
6, method according to claim 2 is characterized in that, sends described bandwidth request information by the cycle of setting.
7, method according to claim 6 is characterized in that, the described cycle is consulted to determine by each node or sets by webmaster is unified, and the transmission cycle unanimity of each node.
8, method according to claim 1 is characterized in that, described bandwidth allocation algorithm according to described bandwidth request information and setting distributes the bandwidth of each T-CONT frame to comprise:
Determine the type of T-CONT frame according to described bandwidth request information;
The bandwidth of distributing each T-CONT frame according to the type and the bandwidth allocation algorithm of all T-CONT frames.
9, method according to claim 8 is characterized in that:
The numbering that comprises the T-CONT frame in the described bandwidth request information; Describedly determine that according to described bandwidth request information the type of T-CONT frame comprises: the type of determining the T-CONT frame according to the numbering of the corresponding relation of T-CONT numbering of obtaining in advance and property parameters and the T-CONT frame in the described bandwidth request information; The numbering and the corresponding property parameters that comprise the T-CONT frame in the perhaps described bandwidth request information; Describedly determine that according to described bandwidth request information the type of T-CONT frame comprises: the type of determining the T-CONT frame according to the corresponding relation of numbering of the T-CONT in the described bandwidth request information and property parameters;
Wherein, each T-CONT frame has the unique numbering of the whole network; Described property parameters comprises the sending node and the receiving node of the minimum length of T-CONT frame loaded service type, guaranteed bandwidth, T-CONT frame and maximum length, distribution priority, T-CONT frame.
10, method according to claim 8, it is characterized in that, also comprise: the fixed-bandwidth FB business that each node will be gone to same destination is mapped to same T-CONT frame, is mapped to same T-CONT frame with going to the assurance bandwidth AB of same destination and transmitting the BE business as possible.
11, method according to claim 10 is characterized in that, described type and bandwidth allocation algorithm according to all T-CONT frames distributes the bandwidth of each T-CONT frame to comprise:
For the bandwidth request of a plurality of dissimilar T-CONT frames, be that each T-CONT frame distributes bandwidth according to the priority of all types of T-CONT frames;
For the bandwidth request of a plurality of T-CONT frames of the same type, be that each T-CONT frame distributes bandwidth according to described distribution priority.
12, according to each described method of claim 1 to 11, it is characterized in that, subchannel by transmission bandwidth assignment information in the described Frame sends described bandwidth allocation information, and described bandwidth allocation information comprises the numbering of T-CONT frame, the original position of distributing and end position in Frame.
13, method according to claim 12 is characterized in that, also comprises:
The subchannel of each node transmission bandwidth assignment information from Frame obtains described bandwidth allocation information;
Determine that according to described bandwidth allocation information this node sends and receive the position and the length of T-CONT frame;
Position and length according to the T-CONT frame of determining send and receive the T-CONT frame.
14, a kind of dynamic bandwidth allocation apparatus of multi-service transmitting network is characterized in that, comprising:
The solicited message acquiring unit is used for obtaining the bandwidth request information of all transmission container T-CONT frames of Frame of transmission polymorphic type business;
The allocated bandwidth unit is used for distributing according to the bandwidth allocation algorithm of bandwidth request information and setting the bandwidth of each T-CONT frame;
The assignment information transmitting element, the bandwidth that is used for distributing according to described allocated bandwidth unit sends bandwidth allocation information each node to multi-service transmitting network.
15, device according to claim 14 is characterized in that, comprises the numbering of T-CONT frame in the described bandwidth request information, and each T-CONT frame has the unique numbering of the whole network; Described device also comprises:
Memory cell, be used to store the corresponding relation of T-CONT numbering and property parameters, described property parameters comprises the sending node and the receiving node of the minimum length of T-CONT frame loaded service type, guaranteed bandwidth, T-CONT frame and maximum length, distribution priority, T-CONT frame;
Described allocated bandwidth unit comprises:
Type is determined subelement, is used for according to described T-CONT numbering and the corresponding relation of property parameters and the type that described bandwidth request information is determined all T-CONT frames;
Distribute subelement, be used for the bandwidth that type and bandwidth allocation algorithm according to described all T-CONT frames distribute each T-CONT frame.
16, device according to claim 15 is characterized in that,
Described distribution subelement is for the bandwidth request of a plurality of dissimilar T-CONT frames, priority according to all types of T-CONT frames is that each T-CONT frame distributes bandwidth, for the bandwidth request of a plurality of T-CONT frames of the same type, be that each T-CONT frame distributes bandwidth according to described distribution priority.
17, a kind of apparatus for network node is characterized in that, comprising:
Monitoring means is used to monitor the actual bandwidth demand of local T-CONT frame to be sent;
The solicited message generation unit is used for producing bandwidth request information according to the bandwidth request information generation rule of actual bandwidth demand and setting;
The solicited message transmitting element is used to send described bandwidth request information.
18, network node according to claim 17 is characterized in that, also comprises:
Setup unit is used to set described bandwidth request information generation rule, and described bandwidth request information generation rule comprises:
If the T-CONT frame of unassigned bandwidth is arranged, then produces bandwidth request information; And/or
If distributed the actual bandwidth demand of the T-CON frame of bandwidth to surpass, then produced bandwidth request information for the bandwidth of described T-CONT frame distribution or above preset threshold.
19, network node according to claim 17 is characterized in that, also comprises: negotiation element and/or dispensing unit;
Described negotiation element is used for consulting to determine that with other nodes bandwidth request information sends the cycle;
Described dispensing unit is used to set bandwidth request information and sends the cycle;
The cycle that the described request information transmitting unit is set by described negotiation element or described dispensing unit sends bandwidth request information.
20, according to each described network node of claim 17 to 19, it is characterized in that, also comprise:
The assignment information receiving element is used for obtaining bandwidth allocation information from the subchannel of Frame transmission bandwidth assignment information;
Determining unit is used for determining that according to described bandwidth allocation information this node sends and receive the position and the length of T-CONT frame;
Data transmission unit is used for sending the T-CONT frame according to the position and the length of the T-CONT frame of determining;
The Data Receiving unit is according to the position and the length reception T-CONT frame of the T-CONT frame of determining.
21, a kind of multi-service transmitting network system is characterized in that, comprising: dynamic bandwidth allocation apparatus and a plurality of apparatus for network node; Described apparatus for network node, be used to monitor the actual bandwidth demand of this locality T-CONT frame to be sent, bandwidth request information generation rule according to actual bandwidth demand and setting produces bandwidth request information, and described bandwidth request information is sent to described dynamic bandwidth allocation apparatus;
Described dynamic bandwidth allocation apparatus is used for the bandwidth that the bandwidth allocation algorithm according to the bandwidth request information of described apparatus for network node and setting distributes each T-CONT frame, and sends bandwidth allocation information to each apparatus for network node node.
22, system according to claim 21 is characterized in that, described dynamic bandwidth allocation apparatus is each described dynamic bandwidth allocation apparatus of claim 14 to 16.
According to claim 21 or 22 described systems, it is characterized in that 23, described apparatus for network node is each described apparatus for network node of claim 17 to 20.
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