CN104954262A - Fast data forwarding method and system - Google Patents
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- CN104954262A CN104954262A CN201510352914.9A CN201510352914A CN104954262A CN 104954262 A CN104954262 A CN 104954262A CN 201510352914 A CN201510352914 A CN 201510352914A CN 104954262 A CN104954262 A CN 104954262A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/54—Organization of routing tables
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/25—Routing or path finding in a switch fabric
- H04L49/252—Store and forward routing
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Abstract
The invention provides a fast data forwarding method and system applied to an HGU (home gateway unit) of a PON (passive optical network). The method comprises steps as follows: received data are cached in a DMA (direct memory access) receiving queue and comprise source address information; according to the DMA receiving queue, data in the DMA receiving queue are matched according to a forwarding matching table, and destination address information is directly acquired; the data are packaged again and forwarded to a DMA sending queue; according to the DMA sending queue, the data packaged again are forwarded to a destination network interface according to the destination address information. Besides, when the data cannot be matched according to the forwarding matching table, the data are sent to a CPU (central processing unit) to be processed, the destination address information is acquired, and the source address information, the destination address information as well as the matching relation between the source address information and the destination address information are added to the forwarding matching table. With the adoption of the method and the system, the CPU occupancy rate during data forwarding is greatly decreased, and the data forwarding speed is increased.
Description
Technical field
The present invention relates to data communication field, particularly relate to a kind of data fast forwarding method based on PON home gateway unit and system.
Background technology
Along with the development of the communication technology, Network is diversity more and more, also increasing to the demand of the network bandwidth.Intelligent acess technology has because of it developing direction that advantages such as high bandwidth, long transmission distance, antijamming capability be strong become Future Access Network technology.
Passive optical-fiber network PON (Passive Optical Network) technology is a kind of point-to-multipoint intelligent acess technology.Whole PON is formed primarily of the optical line terminal OLT (Optical Line Terminal) of local side, the optical network unit ONU (Optical Network Unit) of user side and Optical Distribution Network ODN (Optical Distribution Network).Wherein, ODN part is complete is made up of passive devices such as passive optical splitter (Passive Optical Splitter is called for short POS) and optical fiber.
PON becomes fiber to the home (Fiber To The Home with its easily maintenance, high bandwidth, strong, the comprehensive networking low cost and other advantages of autgmentability, be called for short FTTH), the system architecture of the currently used a kind of the best of intelligent acess occasion such as Fiber To The Building (Fiber To The Building, be called for short FTTB).
At present, home gateway unit HGU (Home Gateway Unit) realizes data from local network LAN (Local Area Network) to the forwarding of wide area network WAN (Wide Area Network) by CPU, such as, DSL (Digital Subscriber Line, digital subscriber line) or ordinary router, due to lower to bandwidth requirement, general tens, so data are after receiving from physical network card, by network process module, data can be sent to CPU, by CPU, data are processed, object network interface card is re-send to according to demand after process, thus realize the forwarding of data from LAN to WAN.
In prior art, the data retransmission of HGU always through CPU, thus will consume CPU always, thus affects the operation of other events.Further, because the deal with data ability of current low profile edge CPU is not powerful, limited to the process of data, when tens, the occupancy of CPU is just very high, has had a strong impact on the speed of HGU data retransmission, also cannot meet the requirement of PON.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of data fast forwarding method and system, and for solving in prior art in PON, the forwarding speed of HGU data from LAN to WAN is slow, the problem that CPU usage is high.
For achieving the above object and other relevant objects, the invention provides a kind of data fast forwarding method, be applied to the HGU of PON, described data fast forwarding method comprises: step S10, by the data buffer storage that receives to DMA receiving queue; The data wherein received draw together source address information; Step S20, according to described DMA receiving queue, mates the data in described DMA receiving queue, obtains destination address information according to forwarding matching list; And encapsulation of data again, be forwarded to DMA transmit queue; The data of Reseal, according to described DMA transmit queue, are forwarded to object network interface according to its destination address information by step S30.
Alternatively, described forwarding matching list comprises source address information, destination address information and matching relationship thereof.
Alternatively, source address information comprises source MAC, source IP address, source port and Ethernet protocol number; Destination address information comprises target MAC (Media Access Control) address, object IP address and destination interface.
Alternatively, in described step S20, Reseal data are drawn together the source MAC in data, source IP address, source port are revised as target MAC (Media Access Control) address, object IP address and destination interface.
Alternatively, in described step S20, according to described DMA receiving queue, the data in described DMA receiving queue are mated according to forwarding matching list, acquisition destination address information comprises: judge whether data can mate according to described forwarding matching list: if can mate, then directly by source address information being revised as corresponding destination address information; If cannot mate, then these data are sent to CPU, by CPU process, thus obtain the destination address information of these data; Further, the source address information of these data, destination address information and matching relationship thereof are added in described forwarding matching list by CPU.
The invention also discloses a kind of data fast-forwarding system, be applied to the HGU of PON, described data fast-forwarding system comprises: DMA receiver module, matching module and DMA sending module; Described DMA receiver module is used for the data of buffer memory reception to DMA receiving queue, and according to described DMA receiving queue, data is added into described matching module; Wherein, the data of reception draw together source address information; Described matching module is used for, according to forwarding matching list, carrying out matching treatment to data, obtains destination address information; Data Reseal is sent in the DMA transmit queue of described DMA sending module; The data of Reseal are sent to corresponding object network interface according to described DMA transmit queue by described DMA sending module.
Alternatively, described forwarding matching list comprises source address information, destination address information and matching relationship thereof.
Alternatively, described data fast-forwarding system also comprises CPU processing module, described CPU processing module is used for when obtaining the destination address information of data by described matching module, these data are processed, thus obtain the destination address information of these data, and destination address information is returned to described matching module; The source address information of these data, destination address information and matching relationship thereof are added into described forwarding matching list.
Alternatively, source address information comprises source MAC, source IP address, source port and Ethernet protocol number; Destination address information comprises target MAC (Media Access Control) address, object IP address and destination interface.
Alternatively, the Reseal of described matching module to data comprises the source MAC in data, source IP address, source port is revised as target MAC (Media Access Control) address, object IP address and destination interface.
As mentioned above, a kind of data fast forwarding method of the present invention and system, be applied to the HGU unit of PON network interface, source address information, destination address information and matching relationship thereof are kept at and forward in matching list, so, the data buffer storage received at LAN mouth is to DMA receiving queue, and data are sent to matching module, just destination address information can be obtained by Rapid matching by forwarding matching list, and be sent to DMA transmit queue to after data Reseal, finally by DMA sending module, the data after Reseal are sent to corresponding object WAN mouth.Whole repeating process, does not need to process data through CPU.And, information in forwarding matching list of the present invention can also be upgraded by CPU, if data cannot obtain destination address information by Rapid matching in forwarding matching list, then these data can be sent to CPU, CPU is had to process it according to rule, thus acquisition destination address information, and by this source address information, destination address information and matching relationship thereof are updated to and forward in matching list, in order to next time, there is identical source MAC, source IP address, the data of source port and Ethernet protocol number directly can carry out Rapid matching by forwarding matching list, and no longer need CPU process.Be not difficult to find out thus, data fast forwarding method of the present invention and system, greatly reduce CPU usage during data retransmission, improves data retransmission speed.
Accompanying drawing explanation
Fig. 1 is shown as the schematic flow sheet of a kind of data fast forwarding method disclosed in the embodiment of the present invention.
Fig. 2 is shown as the structural representation of a kind of data fast-forwarding system disclosed in the embodiment of the present invention.
Element numbers explanation
S10 ~ S30 step
200 data fast-forwarding systems
210 DMA receiver modules
220 matching modules
230 DMA sending modules
240 CPU processing modules
Embodiment
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art the content disclosed by this specification can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by embodiments different in addition, and the every details in this specification also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.It should be noted that, when not conflicting, the feature in following examples and embodiment can combine mutually.
Refer to accompanying drawing.It should be noted that, the diagram provided in following examples only illustrates basic conception of the present invention in a schematic way, then only the assembly relevant with the present invention is shown in graphic but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
Data fast forwarding method and the system being applied to the HGU unit of PON of the present invention, when for solving compared with large bandwidth, it is larger to carry out the occupancy of data retransmission to CPU.It adopts DMA (Direct Memory Access, direct memory access (DMA)) technology, allows direct read/write data between external equipment and memory, neither by CPU, does not also need CPU to intervene.Whole data retransmission carries out under operating in the control of DMA receiver module and DMA sending module.CPU is except doing some process when the first time of same class data (having identical source address information) forwards, in transmitting procedure, CPU can carry out other work.Like this, in the most of the time, CPU and input and output are all in parallel work-flow.Therefore, the efficiency of whole system is made greatly to improve.
Embodiment 1
As shown in Figure 1, present embodiment discloses a kind of data fast forwarding method being applied to the HGU unit of PON, specifically comprise:
Step S10, by the data buffer storage of reception to DMA receiving queue; The data wherein received comprise source address information:
After HGU receives data from LAN mouth, by data buffer storage in DMA receiving queue, meanwhile, trigger hardware interrupts, and informs matching module.Data according to sequencing buffer memory to DMA receiving queue.
Further, the source address information in the data received comprises source MAC, source IP address, source port and Ethernet protocol number.
Step S20, according to DMA receiving queue, mates the data in described DMA receiving queue, obtains destination address information according to forwarding matching list; And encapsulation of data again, be forwarded to DMA transmit queue:
Wherein, forward matching list and comprise source address information, destination address information and matching relationship thereof.Data, according to its source address information, can mate by forwarding matching list the destination address information obtaining correspondence.Further, destination address information comprises: target MAC (Media Access Control) address, object IP address and destination interface.
First, after data buffer storage to DMA receiving queue, according to the order of DMA receiving queue, data are mated according to forwarding matching list, and judge whether coupling:
If can mate, so directly obtain the destination address information that these data are corresponding;
If can not mate, then these data are sent to CPU, according to Ethernet protocol, data are processed, obtain corresponding destination address information, and source address information, destination address information and matching relationship thereof are added in forwarding matching list;
Then, according to destination address information, Reseal is carried out to data: directly the source MAC in data, source IP address, source port are revised as target MAC (Media Access Control) address, object IP address and destination interface;
Finally, by the data retransmission of Reseal to DMA transmit queue.
Be not difficult to find out, there are the data of identical source MAC, source IP address, source port and Ethernet protocol number, first data is only had to need through CPU process, remaining data only needs the result according to the CPU being updated to first data forwarded in matching list, just directly can obtain destination address information, no longer need by CPU process.
The data of Reseal, according to DMA transmit queue, are forwarded to object network interface according to its destination address information by step S30.
It should be noted that, above the step of method divide, just in order to be described clearly, a step can be merged into when realizing or some step split, being decomposed into multiple step, as long as comprise identical logical relation, all in the protection range of this patent; To adding inessential amendment in algorithm or in flow process or introducing inessential design, but the core design not changing its algorithm and flow process is all in the protection range of this patent.
Embodiment 2
Present embodiment discloses a kind of data fast-forwarding system 200 being applied to the HGU unit of PON, as shown in Figure 2, comprising: DMA receiver module 210, matching module 220, DMA sending module 230 and CPU processing module 240.
Wherein, DMA receiver module 210 for the data buffer storage that will receive from LAN mouth in DMA receiving queue, hardware interrupts of simultaneously setting out, and according to the order of DMA receiving queue, data are added into matching module 220.Wherein, the data received from LAN mouth include but not limited to source address information, and source address information comprises source MAC, source IP address, source port and Ethernet protocol number.
Matching module 220, for according to forwarding matching list, carrying out matching treatment and Reseal to data, being sent in the DMA transmit queue of DMA invention module 230.Matching module 220, according to the source address information comprised in data, according to forwarding matching list, directly can obtain destination address information; Further, according to destination address information, Reseal is carried out to data.In the present embodiment, the source address information in data is revised as destination address information; Target MAC (Media Access Control) address, object IP address and destination interface is revised as by source MAC, source IP address, source port; Finally the data through Reseal are sent in the DMA transmit queue of DMA invention module 230.
Datagram, according to the order of DMA transmit queue, according to the destination address information of the data of Reseal, is sent to corresponding wan mouth (object network interface) by DMA sending module 230.
CPU processing module 240, for carrying out rule process conversion to data, obtains the destination address information that data are corresponding, and destination address information is returned to matching module 220; And upgrade forwarding matching list.
Cannot by the source address information of data with when forwarding matching list acquisition destination address information at matching module 220, these data can be sent to CPU processing module 240 by matching module 220, CPU processing module 240 processes data according to Ethernet protocol, obtain corresponding destination address information, and the destination address information of correspondence is returned to matching module 220, so that matching module 220 carries out Reseal according to destination address information to data.
Carry out after process obtains destination address information in CPU processing module 240 pairs of data, also the source address information of these data, destination address information and matching relationship thereof are added into and forward in matching list, time for receiving the data with identical source address information later, no longer need CPU processing module to carry out a large amount of data processings to data, directly utilize and forward matching list obtains its correspondence destination address information by matching module 220.
It should be noted that, in order to outstanding innovative part of the present invention, the module not too close with solving technical problem relation proposed by the invention is not introduced in the present embodiment, but this not showing the module that there is not other in the present embodiment.
Further, be not difficult to find, the present embodiment is system embodiment corresponding to those in the first embodiment, and the present embodiment can be worked in coordination with the first embodiment and be implemented.The relevant technical details mentioned in first embodiment is still effective in the present embodiment, in order to reduce repetition, repeats no more here.Correspondingly, the relevant technical details mentioned in the present embodiment also can be applicable in the first embodiment.
In sum, a kind of data fast forwarding method of the present invention and system, be applied to the HGU unit of PON network interface, source address information, destination address information and matching relationship thereof are kept at and forward in matching list, so, the data buffer storage received at LAN mouth is to DMA receiving queue, and data are sent to matching module, just destination address information can be obtained by Rapid matching by forwarding matching list, and be sent to DMA transmit queue to after data Reseal, finally by DMA sending module, the data after Reseal are sent to corresponding object WAN mouth.Whole repeating process, does not need to process data through CPU.And, information in forwarding matching list of the present invention can also be upgraded by CPU, if data cannot obtain destination address information by Rapid matching in forwarding matching list, then these data can be sent to CPU, CPU is had to process it according to rule, thus acquisition destination address information, and by this source address information, destination address information and matching relationship thereof are updated to and forward in matching list, in order to next time, there is identical source MAC, source IP address, the data of source port and Ethernet protocol number directly can carry out Rapid matching by forwarding matching list, and no longer need CPU process.Be not difficult to find out thus, data fast forwarding method of the present invention and system, greatly reduce CPU usage during data retransmission, improves data retransmission speed.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (10)
1. a data fast forwarding method, is applied to the HGU of PON, it is characterized in that, described data fast forwarding method comprises:
Step S10, by the data buffer storage of reception to DMA receiving queue; The data wherein received draw together source address information;
Step S20, according to described DMA receiving queue, mates the data in described DMA receiving queue, directly obtains destination address information according to forwarding matching list; And encapsulation of data again, be forwarded to DMA transmit queue;
The data of Reseal, according to described DMA transmit queue, are forwarded to object network interface according to its destination address information by step S30.
2. data fast forwarding method according to claim 1, is characterized in that: described forwarding matching list comprises source address information, destination address information and matching relationship thereof.
3. data fast forwarding method according to claim 2, is characterized in that: source address information comprises source MAC, source IP address, source port and Ethernet protocol number; Destination address information comprises target MAC (Media Access Control) address, object IP address and destination interface.
4. data fast forwarding method according to claim 3, is characterized in that: in described step S20, Reseal data are drawn together and the source MAC in data, source IP address, source port are revised as target MAC (Media Access Control) address, object IP address and destination interface.
5. data fast forwarding method according to claim 2, is characterized in that: in described step S20, according to described DMA receiving queue, mates the data in described DMA receiving queue according to forwarding matching list, obtains destination address information and comprise:
Judge whether data can mate according to described forwarding matching list:
If can mate, then directly by source address information being revised as corresponding destination address information;
If cannot mate, then these data are sent to CPU, by CPU process, thus obtain the destination address information of these data; Further, the source address information of these data, destination address information and matching relationship thereof are added in described forwarding matching list by CPU.
6. a data fast-forwarding system, is applied to the HGU of PON, it is characterized in that: described data fast-forwarding system comprises: DMA receiver module, matching module and DMA sending module;
Described DMA receiver module is used for the data of buffer memory reception to DMA receiving queue, and according to described DMA receiving queue, data is added into described matching module; Wherein, the data of reception draw together source address information;
Described matching module is used for, according to forwarding matching list, carrying out matching treatment to data, obtains destination address information; Data Reseal is sent in the DMA transmit queue of described DMA sending module;
The data of Reseal are sent to corresponding object network interface according to described DMA transmit queue by described DMA sending module.
7. data fast-forwarding system according to claim 6, is characterized in that: described forwarding matching list comprises source address information, destination address information and matching relationship thereof.
8. data fast-forwarding system according to claim 7, it is characterized in that: described data fast-forwarding system also comprises CPU processing module, described CPU processing module is used for when obtaining the destination address information of data by described matching module, these data are processed, thus obtain the destination address information of these data, and destination address information is returned to described matching module; The source address information of these data, destination address information and matching relationship thereof are added into described forwarding matching list.
9. data fast-forwarding system according to claim 7, is characterized in that: source address information comprises source MAC, source IP address, source port and Ethernet protocol number; Destination address information comprises target MAC (Media Access Control) address, object IP address and destination interface.
10. data fast-forwarding system according to claim 9, is characterized in that: the Reseal of described matching module to data comprises the source MAC in data, source IP address, source port are revised as target MAC (Media Access Control) address, object IP address and destination interface.
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| CN109428819A (en) * | 2017-08-28 | 2019-03-05 | 阿里巴巴集团控股有限公司 | Transmit method, networking component, equipment and the computer storage medium of data |
| CN109711998A (en) * | 2018-08-20 | 2019-05-03 | 中国平安人寿保险股份有限公司 | Data transmission method, device, equipment and readable storage medium storing program for executing |
| CN109815176A (en) * | 2019-01-14 | 2019-05-28 | 中国科学院上海高等研究院 | Specific DMA data sending method, method of reseptance, system and medium |
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