CN101631135A - Method and device for two-layer intercommunication for data stream - Google Patents
Method and device for two-layer intercommunication for data stream Download PDFInfo
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- CN101631135A CN101631135A CN200810132434.1A CN200810132434A CN101631135A CN 101631135 A CN101631135 A CN 101631135A CN 200810132434 A CN200810132434 A CN 200810132434A CN 101631135 A CN101631135 A CN 101631135A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC
Abstract
The embodiment of the invention discloses a method and a device for two-layer intercommunication for data stream. The method comprises the following steps: extracting characteristic information of the data stream; determining a control point of the data stream according to the characteristic information of the data stream; and establishing a feature mark and a control rule of the data stream on the control point according to the characteristic information of the data stream so as to realize the two-layer intercommunication for the data stream according to the feature mark and the control rule. The method and the device realize identification and two-layer intercommunication for the data stream in the same or different sub networks, and achieve the effects of relieving the load of the network, improving the transmission efficiency of the network and improving the use experiments of users.
Description
Technical field
The present invention relates to data communication field, particularly relate to a kind of method and apparatus of two-layer intercommunication for data stream.
Background technology
As shown in Figure 1, existing Access Network framework comprises three parts: broadband gateway, convergence-level (Aggregation Network) and Access Layer (Access Network).Two layers of isolation between all user in Access Network, even communication between two users under the same gateway, flow also must pass through gateway.Along with user's continuous growth and continuing to bring out of P2P business, the framework of existing Access Network causes through the flow of gateway too high, becomes the bottleneck in the network.
In the prior art, by setting up P2P VLAN (Virtual Local Area Network, VLAN) scheme of realization double layer intercommunication is specially: at first need newly create a special P2P VLAN in Access Network, at all access nodes (Access Node, AN) and on the convergent point equipment create P2PVLAN, realize double layer intercommunication by P2P VLAN to realize these equipment; On all access nodes, increase simultaneously address resolution protocol (Address Resolution Protocol, ARP) agent functionality, the ARP proxy function on the access node comprises three modules: upstream ARP proxy (Upstream ARP proxy), downstream ARP proxy (Downstream ARP proxy) and arp cache (ARP Cache); Also need on access node, increase arbitration functions in addition, judge whether user current and that it directly links to each other enables the P2P business.
The inventor finds that in research process above-mentioned prior art just judges whether to enable the P2P business, is which kind of P2P business and can not determine the end on access node apparatus, the accuracy of distinguishing has been subjected to considerable restraint.On the other hand, this scheme can only realize the double layer intercommunication in the same IP subnet, and range of application has been subjected to very big limitation.
Summary of the invention
The problem that the embodiment of the invention will solve provides a kind of method and apparatus of two-layer intercommunication for data stream, realizes the identification and the double layer intercommunication of the data flow in the identical or different subnet.
For achieving the above object, the embodiment of the invention proposes a kind of method of two-layer intercommunication for data stream on the one hand, may further comprise the steps:
Extract the characteristic information of data flow;
Determine the control point of described data flow according to the characteristic information of described data flow;
On described control point, set up the signature identification and the control law of described data flow, being that described data flow realizes double layer intercommunication according to described signature identification and control law according to the characteristic information of described data flow.
On the other hand, the embodiment of the invention has also proposed a kind of network element, it is characterized in that, comprising:
Parameter extraction module is used to extract the characteristic information of data flow;
Module is selected at the control point, and the characteristic information that is used for the described data flow extracted according to described parameter extraction module is determined the control point of described data flow;
Rule is set up module, and the characteristic information that is used for extracting according to described parameter extraction module selects to set up on the definite control point of module the signature identification and the control law of described data flow at described control point.
On the other hand, the embodiment of the invention has also proposed a kind of control point, comprising:
The rule receiver module is used to receive signature identification and control law about described data flow;
The flow matches module is used for mating corresponding data flow according to the signature identification that described regular receiver module receives;
The flow operational module is used for operating described data flow message according to the control law that described regular receiver module receives.
The technical scheme of the embodiment of the invention has the following advantages, because adopted characteristic information extraction, select the control point, identification is also revised the data flow message, sets up the method for double layer intercommunication, thereby, the identification and the double layer intercommunication of the data flow in the identical or different subnet have been realized, reached and alleviated network burden, improved network transmission efficiency, improved the effect of user's experience.
Description of drawings
Fig. 1 is the structural representation of the Access Network framework of prior art;
Fig. 2 is the method flow schematic diagram of a kind of two-layer intercommunication for data stream in the embodiment of the invention;
Fig. 3 is a control point schematic diagram in a kind of tree network structure in the embodiment of the invention;
Fig. 4 is for setting up the schematic flow sheet of two layers of path of data streaming service in the embodiment of the invention;
Fig. 5 is the message forwarding process schematic diagram during different VLAN for communicating pair in the embodiment of the invention is in;
Fig. 6 is the message forwarding process schematic diagram during identical VLAN for communicating pair in the embodiment of the invention is in;
Fig. 7 is the structural representation of the described network element of the embodiment of the invention;
Fig. 8 is the structural representation at the described control point of the embodiment of the invention.
Embodiment
In most existing Access Network solution, the flow that is in different VLAN or is in the different IP subnet all needs to transmit through network access server, and is too big to the impact of network access server.On the other hand, though some prior art has realized the double layer intercommunication between the user, can not segment business, also require the user to be in the same IP subnet simultaneously, the user of different sub-network still needs through the network access server intercommunication.
The scheme that the present invention proposes can not influence existing business, and gateway is still passed through in the communication between them, realizes professional control and management function by gateway.But to two layers of special path of some higher P2P service creations of occupied bandwidth, make and flow that these are professional and without gateway reduce the burden of gateway, do not influence other original business simultaneously.
As shown in Figure 2, the method flow schematic diagram for a kind of two-layer intercommunication for data stream in the embodiment of the invention comprises the steps:
Step S201, network access server extract the characteristic information of data flow.
When network access server thinks between two users that certain bar data flow does not need to transmit by network access server,, obtain the characteristic information of this data flow by reading the message in this data flow and extracting the modes such as characteristic information of message.
Step S202, determine the control point of this data flow.
The control point is the notion that the embodiment of the invention proposes, and particular content is as follows:
Existing network infrastructure comprises tree-like, annular and entirely be connected structure such as shape, and in any structure, the path of user node arrival network access server has a lot of bars.Suppose to have two user A and B, various possible paths from A to the network access server and the various possible paths from B to the network access server must have at least one intersection point, when an intersection point was only arranged, this intersection point was the control point that the embodiment of the invention proposes.
When a plurality of intersection points existed, determining of control point can be according to following rule:
1, this intersection point distance sources user (being user A) and apart from the jumping figure sum minimum of purpose user (being user B);
2,, in the intersection point of the jumping figure minimum that meets this preset rules, select one as the control point according to the certain predetermined rule.
This rule can be the nearest intersection point of chosen distance source user (being user A) as the control point, perhaps the nearest intersection point of chosen distance purpose user (being user B) is as the control point, or the focus of selecting to have stronger disposal ability is as the control point etc.Under opposite extreme situations, the control point between two users is exactly a network access server, and just can think that these two users do not have necessity of double layer intercommunication this moment.
Under the more satisfactory situation, there are other intersection points except that network access server between user A and the user B, can determine the control point of optimum, carry out double layer intercommunication at this control point according to network topology and intersection point physical location and performance thereof.
As shown in Figure 3, the embodiment of the invention has provided an example determining the control point under the tree network structure.The possible path that path 1 representative of consumer 1 is connected with network access server, the possible path that path 2 representative of consumer 4 are connected with network access server, there are two intersection points in two paths, be network equipment X and network access server, all can become the control point, but because in network, only need to select the intersection point of an optimum to become the control point, so, need select optimum intersection point to become the control point according to above-mentioned preset rules.Because network equipment X is than more close user 1 of network access server and user 4, so, no matter according to the preset rules of the nearest intersection point of above-mentioned chosen distance source user as the control point, perhaps according to the preset rules of the nearest intersection point of chosen distance purpose user as the control point, network equipment X all is more suitable for becoming the control point than network access server, so, if the hardware condition of network equipment X itself can support to implement double layer intercommunication, so, just select network equipment X as the control point.
But, need further be pointed out that, if network equipment X does not possess the hardware condition of implementing double layer intercommunication, so, even network equipment X is nearer than network access server distance sources user or purpose user distance, can not select network equipment X as the control point, and should select to have the network access server of double layer intercommunication ability as the control point.
Step S203, on the control point, set up the signature identification and the control law of data flow according to characteristic information.
According to the characteristic information that extracts among the step S201, on the control point, set up signature identification, determine matching condition, so that for discerning corresponding data flow according to signature identification in the control point to this data flow.
What need further describe is, the described signature identification of the embodiment of the invention, can be the data flow key message that is extracted according to the data flow characteristic information, as: as source address and port numbers, destination address and port numbers etc. can make this message be different from the information of other messages; Also can be the feature description that characteristic information generated according to data flow, this feature description have illustrated the feature of destination data stream, and/or with the difference of other data flow.The difference of above-mentioned signature identification content does not influence protection scope of the present invention.
On the other hand, control law is used to stipulate rule that the data flow of Satisfying Matching Conditions is adjusted.
Step S204, control point judge whether the data flow and this signature identification that receive mate.
If the match is successful, show that then this data flow is the data flow that the determined needs of network access server are set up double layer intercommunication, changes step S205 over to;
If coupling is unsuccessful, show that then this data flow is not the data flow that the determined needs of network access server are set up double layer intercommunication, still transmits via network access server according to original route this data flow.
The data flow that step S205, control point are set up double layer intercommunication according to control law to described needs is adjusted.
When the communicating pair of setting up the data flow of double layer intercommunication when described needs is positioned at identical VLAN, the adjustment of this data flow is comprised revise source MAC and revise target MAC (Media Access Control) address;
When the communicating pair of described data flow is positioned at different virtual LAN VLAN, to the adjustment of this data flow except revising source MAC and revising the target MAC (Media Access Control) address, also comprise and revise the VLAN identification field, thereby realize that the communicating pair under the different sub-network can communicate according to the rule of communication under the same subnet.
Step S206, data flow are carried out double layer intercommunication by the control point.
No longer communicated by above-mentioned steps recognition data stream, but directly carry out double layer intercommunication by the control point through network access server.
Further, above-mentioned steps for realizing the schematic flow sheet of the double layer intercommunication of specific transactions in the embodiment of the invention, comprises the steps: as shown in Figure 4
Step S401, network access server extract the characteristic information of the formed data flow of session between user 1 and the user 2.
When user 1 will carry out the transmission of specific transactions with user 2.At first set up this professional session connection between user 1 and the user 2.Before double layer channel was set up, all flows of user 1 and user 2 all needed through the network access server transfer.The formed characteristic information of this session is obtained in session between network access server analysis user 1 and the user 2.
Step S402, determine user 1 and user's 2 control point.
Network access server is determined user 1 and user's 2 control point according to known network topology structure, determines that the method at control point and above-mentioned steps S202 to S203 are similar, does not repeat them here.The signature identification and the control corresponding rule of this data flow of network access server notice control point.
Step S403, adjust the data flow of this session, realize double layer intercommunication by the control point.
When message is received at the control point, utilize signature identification that message characteristic information in the data flow is mated, if the match is successful, then according to operation rules message is made amendment and transmit by the control point.
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail:
Be convenient narration, the embodiment of the invention is that example describes with the P2P business, but can carry out specific identification and double layer intercommunication by technical scheme of the present invention too for other business, and professional difference does not influence protection scope of the present invention.
As shown in Figure 5, the message forwarding process schematic diagram when communicating pair is in different VLAN in the embodiment of the invention comprises the steps:
The user 1 (VLAN1) and the user 2 (VLAN2) that belong to different VLAN communicate.At first user 1 sends to user 2 and sets up the P2P conversation request message, and this request message is through network access server.Network access server extracts characteristic information from the message of this request message, thereby determine the signature identification of the pairing data flow of this solicited message according to this characteristic information, and further in the intersection point between user 1 and user 2, select optimum intersection point as the control point according to preset rules.The place sets up message matching condition (source IP at the control point, source port number, purpose IP, the destination slogan, type of service) and corresponding data message operation rules (revising source MAC is the MAC of network access server, revising purpose MAC is user 2 MAC, and the VLAN mark is made into VLAN2 from VLAN1), to set up double layer channel.
Step S501, user 1 send datagram to access node 1.
Comprise in this request message: source MAC, i.e. user 1 address; Target MAC (Media Access Control) address, the i.e. address of network access server.
Step S502, access node 1 add VLAN identification field VLAN1 in this data message, send to the control point.
This data message is adjusted according to default data message operation rules in step S503, control point, sends to access node 2.
If the control point is judged the data message of access node 1 transmission and the matching condition in the signature identification and is complementary, so, determine that this data flow is a target P 2P data flow, and according to the data message operation rules of setting up in the control point in advance message is adjusted: change VLAN identification field is VLAN2, source MAC is adjusted into network access server, target MAC (Media Access Control) address is adjusted into user 2, thereby has realized that the user 1 that will be positioned at two subnets is converted into the P2P data flow that is positioned at same subnet that need not through network access server by the P2P data flow that network access server sends to user 2.
Step S504, access node 2 are transmitted adjusted data message and are given user 2, realize double layer intercommunication.
As shown in Figure 6, the message forwarding process schematic diagram when communicating pair is in identical VLAN in the embodiment of the invention comprises the steps:
The user 1 and the user 2 that belong to identical VLAN communicate.At first user 1 sends to user 2 and sets up the request message of P2P session, and this request message is through network access server.Network access server extracts the characteristic information of the pairing data flow of this request message from this request message, and definite user 1 and user's 2 control point.The place sets up message matching condition (source IP, source port number, purpose IP at the control point, the destination slogan, type of service) and corresponding data message operation rules (revising source MAC is the MAC of network access server, and revising purpose MAC is user 2 MAC), to set up double layer channel.
Step S601, user 1 send datagram to access node 1.
This data message comprises: source MAC, i.e. user 1 address; Target MAC (Media Access Control) address, the i.e. address of network access server.
Step S602, access node 1 are transmitted this data message and are given the control point.
This data message is adjusted according to default data message operation rules in step S603, control point, sends to access node 2.
The control point judges that the message of access node 1 transmission and the matching condition in the signature identification are complementary, being defined as this data flow is target P 2P data flow, and according to the data message operation rules of setting up in the control point in advance this data message is adjusted: source MAC is adjusted into network access server BRAS, target MAC (Media Access Control) address is adjusted into user 2, thereby has realized user 1 is converted into the P2P data flow that need not through network access server by the P2P data flow that network access server sends to user 2.
Step S604, access node 2 are transmitted adjusted message and are given user 2, realize double layer intercommunication.
As shown in Figure 7, be the embodiment of the invention three, a kind of structural representation of network element comprises:
Parameter extraction module 1 is used to extract the characteristic information of data flow;
Module 2 is selected at the control point, the control point that the characteristic information specified data that is used for being extracted according to parameter extraction module 1 flows;
Rule is set up module 3, is used for the characteristic information according to parameter extraction module 1 extraction, on the control point that control point selection module 2 is determined, sets up the signature identification and the control law of data flow.
Wherein, module 2 is selected at the control point, comprising:
Rule is provided with submodule 21, is used for the default rule of selecting the control point;
Control point chooser module 22, the rule that the user is provided with the default selection control point of submodule 21 according to rule is selected the control point of data flow.
Wherein, rule is set up module 3, comprising:
Signature identification is set up submodule 31, is used for setting up according to the characteristic information that parameter extraction module 1 is extracted the signature identification of data flow;
Control law is set up submodule 32, is used for determining setting up the control law of the data flow of the signature identification that submodule 31 sets up to meeting matching condition.
As shown in Figure 8, be the embodiment of the invention four, a kind of structural representation of control point comprises:
Rule receiver module 1 is used to receive signature identification and the control law about data flow that the network equipment sends;
Flow matches module 2 is used for mating corresponding data flow according to the signature identification that regular receiver module 1 receives;
Flow operational module 3 is used for according to the control law that regular receiver module 1 receives data being flow to line operate, as the message content of revising data flow and sign etc.
The technical scheme of the embodiment of the invention has the following advantages, because adopted characteristic information extraction, select the control point, identification is also revised the data flow message, sets up the method for double layer intercommunication, thereby, the identification and the double layer intercommunication of the data flow in the identical or different subnet have been realized, reached and alleviated network burden, improved network transmission efficiency, improved the effect of user's experience.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize based on such understanding by the mode that software adds necessary general hardware platform, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.
Claims (9)
1, a kind of method of two-layer intercommunication for data stream is characterized in that, may further comprise the steps:
Extract the characteristic information of data flow;
Determine the control point of described data flow according to the characteristic information of described data flow;
On described control point, set up the signature identification and the control law of described data flow, being that described data flow realizes double layer intercommunication according to described signature identification and control law according to the characteristic information of described data flow.
2, the method for two-layer intercommunication for data stream according to claim 1 is characterized in that the characteristic information of described extraction data flow is specially:
Extract the characteristic information in the message of described data flow.
3, the method for two-layer intercommunication for data stream according to claim 1 is characterized in that, describedly sets up the signature identification of described data flow according to characteristic information on described control point, is specially:
The signature identification of the message matching condition of the described data flow of setting up according to described characteristic information of expression.
4, the method for two-layer intercommunication for data stream according to claim 1 is characterized in that, describedly sets up the control law of described data flow according to characteristic information on described control point, is specially:
Foundation meets the operation rules of message of the data flow of described message matching condition.
As the method for two-layer intercommunication for data stream as described in claim 3 or 4, it is characterized in that 5, described is that described data flow realizes double layer intercommunication according to signature identification and control law, is specially:
Corresponding data flow message is mated according to the signature identification of described data flow in described control point;
Operate described data flow message according to described control law.
6, a kind of network element is characterized in that, comprising:
Parameter extraction module is used to extract the characteristic information of data flow;
Module is selected at the control point, and the characteristic information that is used for the described data flow extracted according to described parameter extraction module is determined the control point of described data flow;
Rule is set up module, and the characteristic information that is used for extracting according to described parameter extraction module selects to set up on the definite control point of module the signature identification and the control law of described data flow at described control point.
As network element as described in the claim 6, it is characterized in that 7, module is selected at described control point, comprising:
Rule is provided with submodule, is used for the default rule of selecting described control point;
Control point chooser module, the user is provided with the control point of the rule selection data flow at the default selection control point of submodule according to described rule.
8, as network element as described in the claim 6, it is characterized in that described rule is set up module, comprising:
Signature identification is set up submodule, is used for setting up according to the characteristic information that described parameter extraction module is extracted the signature identification of described data flow;
Control law is set up submodule, is used for determining setting up the control law of the data flow of the signature identification that submodule sets up to meeting described matching condition.
9, a kind of control point is characterized in that, comprising:
The rule receiver module is used to receive signature identification and control law about described data flow;
The flow matches module is used for mating corresponding data flow according to the signature identification that described regular receiver module receives;
The flow operational module is used for operating described data flow message according to the control law that described regular receiver module receives.
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| CN200810132434.1A CN101631135A (en) | 2008-07-15 | 2008-07-15 | Method and device for two-layer intercommunication for data stream |
| PCT/CN2009/070894 WO2010006520A1 (en) | 2008-07-15 | 2009-03-19 | Method and device for two-layer intercommunication of data stream |
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| CN200810132434.1A CN101631135A (en) | 2008-07-15 | 2008-07-15 | Method and device for two-layer intercommunication for data stream |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106302525A (en) * | 2016-09-27 | 2017-01-04 | 黄小勇 | A kind of cyberspace security defend method and system based on camouflage |
| CN111009966A (en) * | 2019-11-22 | 2020-04-14 | 贵州电网有限责任公司 | Data interaction system, method and device of transformer substation equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7092363B1 (en) * | 2000-06-26 | 2006-08-15 | Aperto Networks, Inc. | High-capacity scalable integrated wireless backhaul for broadband access networks |
| CN100359885C (en) * | 2002-06-24 | 2008-01-02 | 武汉烽火网络有限责任公司 | Method for forwarding data by strategic stream mode and data forwarding equipment |
| CN1306776C (en) * | 2004-09-17 | 2007-03-21 | 杭州恒生电子股份有限公司 | Data processing system and data processing method based on multilayer structure |
| CN100550857C (en) * | 2007-04-20 | 2009-10-14 | 华为技术有限公司 | Realize method, system and the access device of intercommunication of two layers of local specific service |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106302525A (en) * | 2016-09-27 | 2017-01-04 | 黄小勇 | A kind of cyberspace security defend method and system based on camouflage |
| CN111009966A (en) * | 2019-11-22 | 2020-04-14 | 贵州电网有限责任公司 | Data interaction system, method and device of transformer substation equipment and storage medium |
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