CN100550857C - Realize method, system and the access device of intercommunication of two layers of local specific service - Google Patents
Realize method, system and the access device of intercommunication of two layers of local specific service Download PDFInfo
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- CN100550857C CN100550857C CNB2007100985658A CN200710098565A CN100550857C CN 100550857 C CN100550857 C CN 100550857C CN B2007100985658 A CNB2007100985658 A CN B2007100985658A CN 200710098565 A CN200710098565 A CN 200710098565A CN 100550857 C CN100550857 C CN 100550857C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
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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
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Abstract
The invention provides method, system and the access device of realizing intercommunication of two layers of local specific service, belong to the communications field.Described method comprises: the source access node of the source device correspondence of selection local specific service and the purpose access node of destination device correspondence, in the separating capacity of access node increase in source to the specific transactions message, after the source access node receives message, judge whether described message is the specific transactions message, if described message is sent to the purpose access node by VLAN; After the purpose access node is received described message, described message is sent to described destination device.Described system comprises: network access server, source access device and purpose access device.Described access device comprises: receiver module, judge module and sending module.Scheme of the present invention is used to alleviate the burden of NAS, and guarantees the fail safe of Access Network simultaneously.
Description
Technical field
The present invention relates to the communications field, particularly realize method, system and the access device of intercommunication of two layers of local specific service.
Background technology
Existing Access Network framework comprises three part: NAS (Network Access Server, network access server), convergence-level and Access Layer.Wherein, NAS is the border of access network and IP network, all flows between the user all need to transmit through NAS, convergence-level is made up of a plurality of convergent points, be used to realize that user's physics or logic insert passage and converge to two layers of NAS, Access Layer is by AN (Access Node, access node) forms, AN is responsible for inserting user's data link layer and physical layer, and do simple two layers of access control, AN is mainly DSLAM (Digital Subscriber Line Access Mutliplexer, Digital Subscriber Line Access Multiplexer) or Ethernet Layer 2 switch at present.Referring to Fig. 1, Fig. 1 is the broadband access network schematic diagram that prior art provides, user A links to each other with same NAS with user B, when user A will communicate with user B, need send the data to NAS by access node AN1, convergent point 1 and convergent point 2, after NAS receives data, give user B with data forwarding by convergent point 2, convergent point 3 and access node AN2.Along with user's the continuous growth and the continuous appearance of P2P (Peer to Peer, point-to-point) streaming media service, the framework of existing Access Network can make through the flow of NAS too high, causes network load overweight.
Prior art provides and has realized P2P flow double layer intercommunication scheme in a kind of Access Network, this scheme at first need newly be created a special VLAN (Virtual Local Area Network in Access Network, VLAN), be called P2P VLAN, promptly on all AN and convergent point equipment, create P2P VLAN, make these equipment realize double layer intercommunication by P2P VLAN; Simultaneously increase ARP (Address Resolution Protocol, address resolution protocol) agent functionality and arbitration functions on all AN, the ARP proxy function on the AN comprises three modules: up ARP module, descending ARP module and arp cache module; Arbitration functions on the AN is used to judge whether user current and that it directly links to each other enables the P2P business.Referring to Fig. 2, Fig. 2 is the Access Network schematic diagram of the realization P2P flow double layer intercommunication that provides of prior art, this Access Network comprises: two subscriber equipmenies (source device D2 and destination device D1), the access node AN1 and access node AN2, the gateway BRAS (Broadband RemoteAccess Server, Broadband Remote Access Server) that link to each other by convergence-level.Wherein, the function of gateway BRAS is identical with NAS.
Referring to Fig. 3, Fig. 3 is the method flow diagram of the realization P2P flow double layer intercommunication that provides of prior art, and the Access Network that provides with Fig. 2 is an example, and it is as follows to the concrete steps of destination device D1 double layer intercommunication to set up source device D2:
Step 101: source device D2 sends the ARP request to destination device D1, MAC (Media AccessControl, the medium access control) address of request destination device D1.
Step 102: access node AN2 carries out the ARP proxy function, the ARP request that reception sources equipment D2 sends.
Step 103: access node AN2 judges that whether source device D2 has enabled the P2P business, if source device D2 has enabled the P2P business, then continues execution in step 104; If source device D2 does not enable the P2P business, then execution in step 105.
Step 104: the up ARP module among the access node AN2 is broadcasted the ARP request of receiving in P2P VLAN, execution in step 106 then.
Step 105: access node AN2 replys the MAC Address of BRAS to source device D2.
Step 106: the descending ARP module among the access node AN1 receives the ARP request of the request destination device D1 of access node AN2 broadcasting.
Step 107: access node AN1 judges that whether destination device D1 has enabled the P2P business, if destination device D1 has enabled the P2P business, then continues execution in step 108; If destination device does not enable the P2P business, then execution in step 109.
Step 108: the MAC Address of access node AN1 search purposes equipment D1 in the arp cache module, and the MAC Address of in P2P VLAN, replying destination device D1 by the up ARP module among the purpose access node AN1 to access node AN2, promptly send the arp reply message, execution in step 110 then.
Step 109: access node AN1 replys the MAC Address of BRAS to access node AN2.
Step 110: the descending ARP module of access node AN2 receives the arp reply message that AN1 sends, and this arp reply message is transmitted to source device D2.
Step 111: source device D2 receives the arp reply message, obtain the MAC Address of destination device D1, this moment, the MAC Address of source device D2 application target equipment D1 sent message, this message is without BRAS, is transmitted to destination device D1 but undertaken in P2P VLAN two layers by access node AN1 and access node AN2.
In this scheme, realized double layer intercommunication by P2P VLAN between the user, alleviated the load of NAS, but in the intercommunication process, source device is known the MAC Address of destination device, has certain potential safety hazard.
Summary of the invention
In order to share the load and the fail safe that guarantees Access Network on the NAS, the embodiment of the invention provides method, system and the access device of realizing intercommunication of two layers of local specific service, and described technical scheme is as follows:
A kind of method that realizes intercommunication of two layers of local specific service, described method comprises:
The source access node of the source device correspondence of selection local specific service and the purpose access node of destination device correspondence are created double layer channel between described source access node and described purpose access node in same VLAN;
After described source access node receives message, judge whether described message is the specific transactions message, if described message is sent to described purpose access node by described double layer channel;
After described purpose access node is received described message, described message is sent to described destination device.
The embodiment of the invention also provides a kind of system that realizes intercommunication of two layers of local specific service, and described system comprises: network access server, source access device and purpose access device;
Described network access server is used to notify the characteristic information of described source access device record specific transactions message;
Described source access device and purpose access device and have double layer channel between described source access device and purpose access device in same VLAN;
Described source access device is used to receive message, and extract the characteristic information of described message, whether the characteristic information of judging described message is identical with the characteristic information of described specific transactions message, if identical, described message sent to described purpose access device by described double layer channel;
Described purpose access device is used to receive the message that described source access device sends, and described message is sent to destination device.
The embodiment of the invention also provides a kind of access device, and described equipment comprises:
Receiver module is used to receive message;
Judge module is used for judging whether the message that described receiver module receives is the specific transactions message;
Sending module when being used for judged result when described judge module and being described message and being the specific transactions message, is transmitted described message by the double layer channel in the VLAN, otherwise, transmit described message by network access server.
The technical scheme that adopts the embodiment of the invention to provide by set up double layer channel between specific two access nodes of VLAN, uses double layer channel to E-Packet, and does not need the specific transactions message is transmitted to NAS, alleviates the load of NAS.And source device does not need to know the MAC Address of destination device, has guaranteed the fail safe of Access Network.
Description of drawings
Fig. 1 is the broadband access network schematic diagram that prior art provides;
Fig. 2 is the Access Network schematic diagram of the realization P2P flow double layer intercommunication that provides of prior art;
Fig. 3 is the method flow diagram of the realization P2P flow double layer intercommunication that provides of prior art;
Fig. 4 is the access network topology schematic diagram that the embodiment of the invention 1 provides;
Fig. 5 is the method flow diagram of the realization intercommunication of two layers of local specific service that provides of the embodiment of the invention 1;
Fig. 6 is the system construction drawing of the realization intercommunication of two layers of local specific service that provides of the embodiment of the invention 2;
Fig. 7 is the structure chart of the access device that provides of the embodiment of the invention 3.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
The embodiment of the invention is by creating special double layer channel to the specific transactions message, make these messages when transmitting without NAS, thereby reduce the burden of NAS, and guarantee the fail safe of Access Network.
Embodiment 1
Referring to Fig. 4, be the access network topology schematic diagram that the embodiment of the invention 1 provides, comprise among the figure: two subscriber equipmenies (user 1 and user 2), access node AN1 and access node AN2, convergence-level, network access server NAS.
Wherein, user 1 links to each other with same NAS with AN2 by the access node AN1 that links to each other with convergence-level with user 2.The specific transactions message of transmission is the local specific service message between user 1 and the user 2, for example: IPTV (Internet ProtocolTeleVision, Web TV) service message, FTP (File Transfer Protocol, file transfer protocol (FTP)) service message, SMTP (Simple Mail Transfer Protocol, Simple Mail Transfer protocol) service message etc.
Node in access node AN1 and AN2 and the convergence-level is among the same VLAN, NAS is according to the physical topological structure of network, select the access node AN1 of user's 1 correspondence and the access node AN2 of user's 2 correspondences, between access node AN1 and AN2, create double layer channel; And on access node AN1, increase the ability of distinguishing the local specific service message, for example: ACL (Access Control List, access control list) function.As AN2 during, also need on AN2, increase the ability of distinguishing the local specific service message as the source access node.
Referring to Fig. 5, Fig. 5 is the method flow diagram of the realization intercommunication of two layers of local specific service that provides of the embodiment of the invention 1, and present embodiment provides a kind of method that realizes intercommunication of two layers of local specific service, and the Access Network that provides with Fig. 4 is that example describes.Wherein, user 1 and user 2 are respectively as source device and destination device, and AN1 and AN2 are respectively as source access node and purpose access node.This method comprises:
Step 201:NAS starts double layer intercommunication and writes down the characteristic information of local specific service message and the user's 1 of this local specific service message correspondence MAC Address and user 2 MAC Address, and the MAC Address of AN1 and AN2.
Characteristic information can be a five-tuple information, comprises user 1 IP address, user 2 IP address, user 1 transport layer port number, user 2 transport layer port number and transport layer type; Characteristic information can also be a hexa-atomic group of information, comprises user 1 IP address, user 2 IP address, user 1 transport layer port number, user 2 transport layer port number, transport layer type, type of service territory; Perhaps characteristic information is reduced to user 1 transport layer port number; Perhaps characteristic information is reduced to user 2 transport layer port number; Perhaps characteristic information is reduced to the type of service territory; Perhaps be user 1 transport layer port number and user 2 transport layer port number; Perhaps be user 1 transport layer port number, user 2 transport layer port number and type of service territory.
Only be used to illustrate, local specific service in the present embodiment is the IPTV service message, the characteristic information of IPTV service message is a five-tuple information, i.e. the user's 1 who carries in the IPTV message IP address, user's 2 IP address, user's 1 transport layer port number, user's 2 transport layer port number and transport layer type.
Mode that NAS can inform by other external business equipment or the double layer intercommunication that starts specific transactions between user 1 and the user 2 by the mode of self-perception.Other external business equipment here can be the policy control server, or has the equipment of policy control ability.
Step 202:NAS notice AN1 creates and storage characteristic information table, the characteristic information of record is stored in this characteristic information table, with 2 of match user 1 and users' local specific service message, realize that the message of this feature of coupling is forwarded on the corresponding AN by VLAN.
For instance, the concrete form of the characteristic information table in the present embodiment is the ACL table, by on AN1, increasing acl feature, when AN1 receives message, if can in the ACL table, find the list item of coupling, promptly the five-tuple information of this message is identical with the five-tuple information of IPTV service message, illustrate that this message is the IPTV service message, then do not transmit this message by NAS, if do not find the list item of coupling in the ACL table, promptly the five-tuple information of the five-tuple information of this message and IPTV service message is inequality, illustrates that this message is not the IPTV service message, then, transmit this message by NAS by the pass-through mode of prior art.
Step 203: in AN1 and the residing same VLAN of AN2, create the double layer channel of an AN1 and AN2.
The detailed process of creating double layer channel is as follows:
AN1 and AN2 open double layer channel by sending out broadcast frame mutually, sending out the mode of carrying the single frames of side mac address or the literary composition of transmitting messages mutually mutually; Perhaps enable acl feature earlier, create double layer channel by the local specific service message.
Simultaneously, the corresponding relation of the MAC Address of recording user 1 and IP address on AN1, the corresponding relation of the MAC Address of recording user 2 and IP address on AN2;
After the MAC Address of the MAC Address of AN1 study AN2 and AN2 study AN1 was finished, AN1 enabled message and distinguishes function, promptly distinguishes the IPTV service message by acl feature.
After step 204:AN1 receives message, extract the characteristic information of message, judge whether the characteristic information that extracts is identical with the characteristic information of local specific service message, promptly in ACL, search the list item that whether has the characteristic information with this message to be complementary, if identical, then execution in step 205; Otherwise, execution in step 207.
For instance, present embodiment is concrete, and what extract is the five-tuple information of message, judges whether the five-tuple information of extracting is identical with the five-tuple information of IPTV service message, promptly searches the list item that whether has the five-tuple information with this message to be complementary in ACL.
Step 205:AN1 is revised as the MAC Address of AN2 with the target MAC (Media Access Control) address of this message, and source MAC is revised as the MAC Address of AN1, and by VLAN this message is transmitted to AN2.
After step 206:AN2 receives message, search the MAC Address of the purpose IP address correspondence of this message, the MAC Address that present embodiment is found is user 2 MAC Address, at this moment original target MAC (Media Access Control) address in the message is revised as user 2 MAC Address, source MAC is revised as the MAC Address of NAS, then this message is sent to user 2.
Step 207: this message is sent to NAS by convergence-level, this message is transmitted to user 2 by NAS.
Embodiment 2
Referring to Fig. 6, Fig. 6 is the system construction drawing of the realization intercommunication of two layers of local specific service that provides of the embodiment of the invention 2, present embodiment provides a kind of system that realizes intercommunication of two layers of local specific service, and this system comprises: network access server, source access device and purpose access device; Local specific service in the present embodiment can be IPTV, FTP or SMTP service message.
Wherein, network access server is used for the characteristic information of notification source access device record specific transactions message;
Source access device and purpose access device and have double layer channel between source access device and purpose access device in same VLAN;
The source access device is used to receive message, and extract the characteristic information of this message, judge whether the characteristic information that is extracted is identical with the characteristic information of specific transactions message, if identical, this message sent to the purpose access device by the double layer channel in the above-mentioned VLAN;
The purpose access device is used for the message that the reception sources access device sends, and sends it to destination device.
Preserved the characteristic information of specific transactions message on the access device of above-mentioned source in advance, whether the message that receives as judgement passes through the foundation that the double layer channel in the VLAN is transmitted.
Embodiment 3
Referring to Fig. 7, Fig. 7 is the structure chart of the access device that provides of the embodiment of the invention 3, and present embodiment provides a kind of access device, and this equipment comprises:
Receiver module is used to receive message;
Judge module is used for judging whether the message that receiver module receives is the specific transactions message;
Sending module is used for transmitting this message by the double layer channel in the VLAN when the judged result of judge module is the specific transactions message for this message, otherwise, transmit this message by network access server.
Wherein, whether the characteristic information of judge module by judging message be identical with the characteristic information of specific transactions message judges whether the message that receives in the receiver module is the specific transactions message, if the characteristic information of message is identical with the characteristic information of specific transactions message, then message is the specific transactions message.
The technical scheme that adopts the embodiment of the invention to provide is distinguished function by increasing service message, and the specific transactions message is transmitted by VLAN, has alleviated the burden of NAS; Simultaneously, source device and destination device are not known the other side's MAC Address, thereby have guaranteed the fail safe of Access Network.
The technical scheme that above embodiment provides can realize that software is stored on the storage medium that can read by hardware and software, as the floppy disk of computer, and hard disk or CD etc.
Above-described embodiment is a more preferably embodiment of the present invention, and common variation that those skilled in the art carries out in the technical solution of the present invention scope and replacement all should be included in protection scope of the present invention.
Claims (10)
1. a method that realizes intercommunication of two layers of local specific service is characterized in that, described method comprises:
The source access node of the source device correspondence of selection local specific service and the purpose access node of destination device correspondence are created double layer channel between described source access node and described purpose access node in same VLAN;
After described source access node receives message, judge whether described message is the specific transactions message, if described message is sent to described purpose access node by described double layer channel;
After described purpose access node is received described message, described message is sent to described destination device.
2. the method for realization intercommunication of two layers of local specific service as claimed in claim 1 is characterized in that, after described source access node receives message, judges that whether described message is the specific transactions message, comprising:
After described source access node receives message, extract the characteristic information of described message;
Whether the characteristic information of judging described message is identical with the characteristic information of specific transactions message.
3. the method for realization intercommunication of two layers of local specific service as claimed in claim 2 is characterized in that, the characteristic information of described specific transactions message is specially:
The transport layer source port number;
Or, transport layer destination slogan;
Or, the type of service territory;
Or, transport layer source port number and transport layer destination slogan;
Or, transport layer source port number, transport layer destination slogan and type of service territory;
Or, source IP address, purpose IP address, transport layer source port number, transport layer destination slogan and transport layer type;
Or, source IP address, purpose IP address, transport layer source port number, transport layer destination slogan, transport layer type and type of service territory.
4. the method for realization intercommunication of two layers of local specific service as claimed in claim 2 is characterized in that, describedly judges whether the characteristic information of described message is identical with the characteristic information of specific transactions message, comprising:
Search the list item that the characteristic information with described message is complementary in the characteristic information table of described source access node, if find, then the characteristic information of described message is identical with the characteristic information of specific transactions message, otherwise, inequality.
5. the method for realization intercommunication of two layers of local specific service as claimed in claim 4 is characterized in that, described characteristic information table specifically is access control list.
6. the method for realization intercommunication of two layers of local specific service as claimed in claim 1 is characterized in that, describedly creates double layer channel between described source access node and described purpose access node, comprising:
Described source access node and described purpose access node are sent out broadcast frame mutually or are sent out mutually and carry the single frames of side mac address or the literary composition of transmitting messages mutually;
The characteristic information of record specific transactions message, MAC Address and the corresponding relation of IP address and the MAC Address of described purpose access node of described source device on the access node of described source;
Write down MAC Address and the corresponding relation of IP address and the MAC Address of described source access node of described destination device at described purpose access node;
On the access node of described source, described specific transactions message is enabled message and distinguish function.
7. as the method for the described realization intercommunication of two layers of local specific service of arbitrary claim in the claim 1 to 6, it is characterized in that, described described message sent to described purpose access node by described double layer channel, comprising:
The target MAC (Media Access Control) address that described source access node is revised in the described message is the MAC Address of described purpose access node, and source MAC is the MAC Address of described source access node;
Described message is sent to described purpose access node by described double layer channel;
Correspondingly, after described purpose access node is received described message, described message is sent to described destination device, comprising:
After described purpose access node is received described message, search the MAC Address of the purpose IP address correspondence of described message, with the MAC Address found MAC Address as destination device, the target MAC (Media Access Control) address of revising described message is the MAC Address of described destination device, and source MAC is the MAC Address of network access server;
Described message is sent to described destination device.
8. a system that realizes intercommunication of two layers of local specific service is characterized in that, described system comprises: network access server, source access device and purpose access device;
Described network access server is used to notify the characteristic information of described source access device record specific transactions message;
Described source access device and purpose access device and have double layer channel between described source access device and purpose access device in same VLAN;
Described source access device is used to receive message, and extract the characteristic information of described message, whether the characteristic information of judging described message is identical with the characteristic information of described specific transactions message, if identical, described message sent to described purpose access device by described double layer channel;
Described purpose access device is used to receive the message that described source access device sends, and described message is sent to destination device.
9. an access device is characterized in that, described equipment comprises:
Receiver module is used to receive message;
Judge module is used for judging whether the message that described receiver module receives is the specific transactions message;
Sending module when being used for judged result when described judge module and being described message and being the specific transactions message, is transmitted described message by the double layer channel in the VLAN, otherwise, transmit described message by network access server.
10. access device as claimed in claim 9, it is characterized in that, whether the characteristic information of described judge module by judging described message be identical with the characteristic information of specific transactions message judges whether the message that receives in the described receiver module is the specific transactions message, if the characteristic information of described message is identical with the characteristic information of specific transactions message, then described message is the specific transactions message.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100985658A CN100550857C (en) | 2007-04-20 | 2007-04-20 | Realize method, system and the access device of intercommunication of two layers of local specific service |
| PCT/CN2008/070333 WO2008128449A1 (en) | 2007-04-20 | 2008-02-20 | Method, system and access device for implementing two-layer intercommunication of special service |
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| CNB2007100985658A CN100550857C (en) | 2007-04-20 | 2007-04-20 | Realize method, system and the access device of intercommunication of two layers of local specific service |
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| CN100550857C true CN100550857C (en) | 2009-10-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447669A (en) * | 2010-09-30 | 2012-05-09 | 迈普通信技术股份有限公司 | Forwarding method of multimedia data streams and forwarding equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN101515944B (en) * | 2008-02-22 | 2013-08-28 | 华为技术有限公司 | Method, system and device for P2P service access |
| JP5159421B2 (en) * | 2008-05-14 | 2013-03-06 | 株式会社日立製作所 | Storage system and storage system management method using management device |
| CN101631135A (en) * | 2008-07-15 | 2010-01-20 | 华为技术有限公司 | Method and device for two-layer intercommunication for data stream |
| GB2462615A (en) | 2008-08-12 | 2010-02-17 | Nec Corp | Optional Access Stratum security activation depending on purpose of request or message parameter in an evolved UTRAN communication network. |
| CN102957755B (en) * | 2011-08-22 | 2018-06-19 | 中兴通讯股份有限公司 | A kind of address resolution method, device and information transferring method |
| CN108712520B (en) * | 2018-05-31 | 2021-03-23 | 安科讯(福建)科技有限公司 | Terminal IP address transparent transmission system and method based on LTE wireless private network |
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| US7660253B2 (en) * | 2005-02-14 | 2010-02-09 | Telefonaktiebolaget L M Ericsson (Publ) | Method and nodes for aggregating data traffic through unicast messages over an access domain using service bindings |
| BRPI0520204B1 (en) * | 2005-05-23 | 2018-05-15 | Telefonaktiebolaget Lm Ericsson Publ | METHODS FOR NON-HIERARCHICAL COMMUNICATION IN AN AGGREGATION NETWORK AND FOR ASSOCIATION OF FINAL DEVICES USING THE CONTRARY FLOW ARP PROXY AND THE NORMAL FLOW ARP PROXY, AND, A NON-HIERARCHICAL COMMUNICATION SYSTEM IN A AGGREGATION NETWORK |
| CN1863215B (en) * | 2005-09-28 | 2010-09-15 | 华为技术有限公司 | Method and system for providing various business services for users |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102447669A (en) * | 2010-09-30 | 2012-05-09 | 迈普通信技术股份有限公司 | Forwarding method of multimedia data streams and forwarding equipment |
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| CN101035088A (en) | 2007-09-12 |
| WO2008128449A1 (en) | 2008-10-30 |
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