CN100536383C - Ip transmission system and method thereof - Google Patents
Ip transmission system and method thereof Download PDFInfo
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- CN100536383C CN100536383C CNB2005100355777A CN200510035577A CN100536383C CN 100536383 C CN100536383 C CN 100536383C CN B2005100355777 A CNB2005100355777 A CN B2005100355777A CN 200510035577 A CN200510035577 A CN 200510035577A CN 100536383 C CN100536383 C CN 100536383C
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Abstract
The related IP transmission system fit to current IP/MPLS network comprises: binding some low-speed path for high bandwidth; loading one two-layer link on every low-speed path loaded by L2VPN when passing IP or MPLS network; and allocating IP packet for low-speed path host and edge router connected to opposite host.
Description
Technical field
The present invention relates to the IP transmission technology, particularly point-to-point IP transmission technology.
Background technology
Internetworking agreement (Internet Protocol is called for short " IP ") is the most important protocol software on the internet.The internet is interconnected by numerous networks and forms, and it is interconnected to rely on these protocol softwares just to be achieved exactly, realizes the communication between internet.IP is the most basic communication protocol, the regulation that it is very concrete the rule that should observe when communicating of computer on the internet.
Based on transmission control protocol/internetworking protocol (Transmission Control Protocol/InternetProtocol, abbreviation " TCP/IP ") ethernet technology is through years of development, at present become the local area network technology that accounts for absolute ascendancy, successfully entered public network core net, take root in metropolitan area network and progressively be penetrated into public access network.Meanwhile, along with development of Ethernet technology, people wish that IP network not only can provide services such as traditional Email (e-mail), online, can also provide and transmit control, service quality services such as (Quality of Service are called for short " QoS ") end to end.
Multiprotocol label switching (Multi-Protocol Label Switching, be called for short " MPLS ") be exactly in recent years on the IP technical foundation, in conjunction with asynchronous transfer mode (Asynchronous Transfer Mode, what abbreviation " ATM ") technical development was got up is a kind of based on a kind of technology of label to accelerate to transmit that is between link layer header and the network layer header, it can compatible multiple network technology and link-layer technologies, can bearing IP packet, it is at Virtual Private Network (Virtual Private Networking at present, be called for short " VPN "), traffic engineering, fields such as QoS have obtained extensive use.
Wherein, the virtual dedicated network that VPN is on public network to be set up, it has and dedicated network same remarkable fail safe, reliability and ease of manageability.VPN has substituted traditional dialing access, utilize the continuity of internet (Internet) public network or carrier network resource as enterprise private, saving expensive special line rent uses, the fail safe of communicating by letter that while VPN can use technique guarantee such as tunnel protocol, authentication and data encryption is subjected to enterprise customer's welcome.Existing VPN is based on internetworking agreement the 4th edition (Internet Protocol version 4 is called for short " IPv4 ") network, and backbone network and the website of promptly forming VPN all are in the IPv4 network.As typical case's representative wherein, how the VPN implementation of Request for Comments (Request for Comments is called for short " RFC ") standard 2547bis definition is to realizing that VPN has made specific descriptions.
L2VPN, or claim " Layer 2 virtual private network " is a kind of among the VPN.This technology is in order to make full use of the IP/MPLS Internet resources and to support data service and releasing, with the IP/MPLS network is such as ATM cell, frame relay (Frame Relay, abbreviation " FR ") the Layer 2 data link bag of frame, ethernet frame and so on provides the transmission passage, so that realize the fusion of IP network and data network.The L2VPN business that the service provider can offer the user has three kinds of different forms, be virtual private circuit business (Virtual Private Wire Service, be called for short " VPWS "), virtual special local area network subnet section (Virtual Private LAN Segment, be called for short " VPLS ") and only support the similar LAN service (IP-only LAN-like Service, abbreviation " IPLS ") of IP.
ADSL (Asymmetric Digital Subscriber Line) (Asymmetric Digital Subscriber Line is called for short " ADSL ") is to utilize digital technology to expand the technology of common copper cash telephone loop bandwidth and handling capacity.Be characterized in that up (direction from user to the telecommunication department) and descending (direction from the telecommunication department to user) speed is asymmetric, i.e. the speed of uplink and downlink is inequality.ADSL utilizes the technology of frequency division multiplexing that ordinary telephone line has been divided into plain old telephone, three kinds of channels of uplink and downlink, thereby has avoided crosstalking each other.Various ADSL can have the up channel of 160 1 640kbit/s and the down channel of 1.5-8Mbit/s.ADSL is applicable to multiple broadband services such as " video request program ", " remote teaching ", " online ".Most broadband services are business that descending transmission television image etc. requires two-forty, and up be the signal that is used for transmitting low speed such as control signaling, can use narrower frequency band.
More than briefly introduced and technology such as IP involved in the present invention, MPLS, VPN, L2VPN and ADSL.Further introduce IP constructing communication network mode below.
As Fig. 1, in the general in the prior art IP constructing communication network mode, main frame 1a, 1b and 1c and main frame 2 are communicated by letter by IP network.
Wherein, main frame 2 is by high-speed line and edge router (Edge Router, abbreviation " ER ") 2 link to each other, but main frame 1a, 1b and 1c are respectively by low speed line and a multiplexer (Multiplexer, abbreviation " MUX ") 1a equipment links to each other, MUX1a is mainly used in convergence and the bridging functionality of realizing two-layer protocol, not process IP layer protocol.MUX1a links to each other with ER1 by a high-speed line.Be IP network or MPLS network between ER1 and the ER2, wherein, the MPLS network is also supported the IP function.
In this case, suppose that the speed of every low speed line between the main frame 1 to MUX1a is M, and certain professional bandwidth is N.As N during greater than M, main frame 1 uses a low speed line just can not meet the demands with MUX, at this moment needs to consider many line bundles, and the physical transfer bandwidth is provided.
Fig. 2 illustrates and is used to the binding scheme commonly used that addresses the above problem at present.As figure, increased a MUX1b in this programme.Wherein, MUX1a places near main frame 1, and MUX1b places near ER1.And, be connected by high-speed line between main frame 1 and the MUX1a; Link to each other by high-speed line between MUX1b and the ER1, MUX1a links to each other by many low speed lines with MUX1b.The total bandwidth of each bar low speed line is more than or equal to service bandwidth M, and each bar low speed line is by physical layer binding or link layer binding.
The shortcoming of such scheme is, can't be applied to present use very widely in the ADSL transmission means.Specifically, as the client Digital Subscriber Line Access Multiplexer (Digital Subscriber LineAccess Multiplexer is arranged, be called for short " DSLAM ") equipment, promptly be equivalent to MUX1a, and provide under the situation of adsl port, because do not have corresponding adsl equipment to finish the function of MUX1b on the market basically, therefore above-mentioned binding scheme has difficulties in reality is promoted.In this case, such scheme can't effectively improve the IP transmission bandwidth.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of IP transmission system and method thereof, makes the IP transmission bandwidth be improved, and current IP/MPLS network extensively is suitable for.
For achieving the above object, the invention provides a kind of IP transmission system, comprise first and second main frames that need carry out IP communication, first and second edge routers that the network that transmits by support IP is connected, with the multiplexer that links to each other by high-speed line with described first edge router, described second main frame is connected by high-speed line with described second edge router, and described first main frame links to each other with described multiplexer by at least two low speed lines;
Described first main frame and second edge router also are used for common foundation and are used for interconnective at least two layers 2 link, and mutual IP between described first and second main frames is responsible for assigning transmits on each bar layer 2 link;
Between described first and second edge routers, described layer 2 link bearer are in layer 2 Virtual Private Network that set in advance; Between described first main frame and multiplexer, each bar layer 2 link bearer is in a described low speed line.
Wherein, described layer 2 number of links are identical with low speed line number between described first main frame and the multiplexer.
In this external described system, the network of described support IP transmission can be IP network or multi-protocol label switching network.
In this external described system, the bandwidth of each described layer 2 link can be identical or different.
In this external described system, the IP address of described first and second main frames can be that public network address also can private net address.
In this external described system, described second edge router and second main frame can be realized in same physical equipment.
In this external described system, described low speed line can be an ADSL (Asymmetric Digital Subscriber Line).
The present invention also provides a kind of IP transmission method, is applied to system mentioned above, and described first main frame or second edge router need be selected a transmission according to preset rule from being used for interconnective each layer 2 link when the opposite end sends the IP bag;
When described first main frame or second edge router are received from the IP of opposite end bag, determine order between each IP bag according to preset rule.
Wherein, the preset rule of the described IP of being used for bag transmission can be packet-by-packet to send according to the order that sets in advance between each layer 2 link.
By relatively finding, the main distinction of technical scheme of the present invention and prior art is, the present invention obtains high bandwidth by bundling many low speed lines, in order to realize binding, layer 2 link of carrying on each bar low speed line carry by L2VPN when these layer 2 link process IP network or MPLS network; The main frame of low speed line side and the edge router that links to each other with high-speed line with the opposite end main frame distribute the IP bag that needs transmission mutually between each layer 2 link.
Difference on this technical scheme has brought comparatively significantly beneficial effect, promptly by the setting of 2 link establishment of many layers and L2VPN, makes many low speed lines can be bundled into a high-speed line, thereby obtains higher point-to-point IP transmission bandwidth.
Because the present invention does not have special requirement to the access device that low speed inserts side, generally enclose extensivelyr so be suitable for, particularly can be applied in the access waies of having been used on a large scale such as ADSL.
Because the IP/MPLS network is not had special requirement, so can be widely used in current IP/MPLS network, utilize the Internet resources of usefulness fully, save the cost of the network rebuilding, increase economic efficiency.
Description of drawings
Fig. 1 is an IP constructing communication network schematic diagram general in the prior art;
Fig. 2 is the networking schematic diagram that high bandwidth is provided with many low speed line bindings in the prior art;
Fig. 3 is the IP transmission system networking schematic diagram according to first embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
As Fig. 3, each component part of the IP transmission system of the present invention's proposition is described at first.
In IP transmission system according to first embodiment provided by the invention, the ER1 and the ER2 that comprise the main frame 1 that need carry out IP communication and main frame 2, be connected by the network of supporting the IP transmission, and a MUX.Here it may be noted that and support that the network of IP transmission can be IP network or MPLS network etc., and the IP address of main frame 1 and main frame 2 can be public network address also can private net address.And ER2 and main frame 2 can be realized (for example can be designed to ER2 a module of main frame 2, perhaps realize ER2 by software in main frame 2) in same physical equipment.In addition, main frame 1 provides a plurality of physical ports that are used to connect low speed line, and each bar low speed line uses a physical port.
Specify the connected mode between the above-mentioned part below.
As shown in Figure 3, MUX links to each other by high-speed line with ER1, and MUX links to each other by 3 low speed lines such as ADSL with main frame 1, and main frame 2 is connected by high-speed line with ER2.According to principle of the present invention, in other embodiments, main frame 1 also can link to each other with MUX by two or more low speed line.
In addition, main frame 1 and ER2 also are used for common foundation and are used for interconnective 3 layer 2 links, and wherein, layer 2 number of links are identical with low speed line number between main frame 1 and the MUX, and main frame 1 and 2 mutual IP of main frame are responsible for assigning transmit on each bar layer 2 link.Between ER1 and ER2, layer 2 link bearer are in the L2VPN that sets in advance; Between main frame 1 and MUX, each bar layer 2 link bearer is in a low speed line.Persons skilled in the art can be understood, here adopt L2VPN, purpose is the data of 2 layers of the network carryings by layer 3, with itself using layer 2 a direct intercommunication between main frame 1 and the ER1, but be layer 3 IP network between ER1 and the ER2, therefore need get through layer 2 circuit between ER0 and the ER1 by L2VPN.
Thus, the present invention makes many low speed lines can be bundled into a high-speed line by the setting of 2 link establishment of many layers and L2VPN, and the IP transmission bandwidth between main frame 1 and the main frame 2 obtains very big lifting with respect to the mode of 1 low speed line.
This shows that the present invention obtains high bandwidth by bundling many low speed lines, in order to realize binding, layer 2 link of carrying on each bar low speed line carry by L2VPN when these layer 2 link process IP network or MPLS network; Main frame 1 and ER2 need distribute the IP bag that needs transmission mutually between each layer 2 link.
In order further to analyze effect of the present invention, the following describes the IP transmission method under above-mentioned networking mode.
At first, can know that by description above in the IP transmission system that the present invention proposes, every layer 2 link between main frame 1 and the ER2 are divided into 2 sections, one section is layer 2 link between main frame 1 and the ER1, and another section is layer 2 link that carried by L2VPN between ER1 and the ER2.Set up many layers 2 link between main frame 1 and the ER1, all layers 2 link that layer 2 link of each physical port carrying of main frame 1, ER1 provide a physical port carrying to link to each other with main frame 1.
Under this networking mode, when main frame 1 or ER2 need according to preset rule, select a transmission from being used for interconnective many layers 2 link when the opposite end sends the IP bag.For example, when 3 layer 2 links, can packet-by-packet send by 3 layer 2 links successively, the 1st bag given No. 1 link, and the 2nd bag given No. 2 links, and the 3rd bag given the 3rd link, and the 4th bag given the 4th link ..., the rest may be inferred.And for example, can design a Hash function, obtain a hash value, send this bag with this hash value link corresponding according to certain property calculation of wrapping.
What deserves to be explained is that in the embodiment that is disclosed, the bandwidth of each layer 2 link is identical, but one of ordinary skill in the art is appreciated that in other embodiments of the invention the bandwidth of each layer 2 link also can be different.The allocation rule of wrapping this moment will be considered the difference on each link bandwidth, and the probability that each link is assigned with bag will be directly proportional with the bandwidth of each link.
It is pointed out that the present invention does not have special requirement to the access device that low speed inserts side, generally enclose extensivelyr, particularly can be applied in the access waies of having been used on a large scale such as ADSL so be suitable for.And, because the present invention does not have special requirement to the IP/MPLS network, can be widely used in current IP/MPLS network, utilize the Internet resources of usefulness fully, save the cost of the network rebuilding, increase economic efficiency greatly.
Though by with reference to some preferred embodiment of the present invention, the present invention is illustrated and describes, those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (9)
1. IP transmission system, comprise first and second main frames that need carry out IP communication, first and second edge routers that the network that transmits by support IP is connected, with the multiplexer that links to each other by high-speed line with described first edge router, described second main frame is connected by high-speed line with described second edge router
It is characterized in that described first main frame links to each other with described multiplexer by at least two low speed lines;
Described first main frame and second edge router also are used for common foundation and are used for interconnective at least two layers 2 link, and mutual IP between described first and second main frames is responsible for assigning transmits on each bar layer 2 link;
Between described first and second edge routers, described layer 2 link bearer are in layer 2 Virtual Private Network that set in advance; Between described first main frame and multiplexer, each bar layer 2 link bearer is in a described low speed line.
2. IP transmission system according to claim 1 is characterized in that, described layer 2 number of links are identical with low speed line number between described first main frame and the multiplexer.
3. IP transmission system according to claim 1 is characterized in that, the network of described support IP transmission is IP network or multi-protocol label switching network.
4. IP transmission system according to claim 1 is characterized in that, the bandwidth of each described layer 2 link is identical or different.
5. IP transmission system according to claim 1 is characterized in that, the IP address of described first and second main frames is public network address or private net address.
6. IP transmission system according to claim 1 is characterized in that, described second edge router and second main frame are realized in same physical equipment.
7. according to each described IP transmission system in the claim 1 to 6, it is characterized in that described low speed line is an ADSL (Asymmetric Digital Subscriber Line).
8. an IP transmission method is applied to the described system of claim 1,
It is characterized in that described first main frame or second edge router need be selected a transmission according to preset rule from being used for interconnective each layer 2 link when the opposite end sends the IP bag;
When described first main frame or second edge router are received from the IP of opposite end bag, determine order between each IP bag according to preset rule.
9. IP transmission method according to claim 8 is characterized in that, the preset rule that the described IP of being used for bag sends is for packet-by-packet sending according to the order that sets in advance between each layer 2 link.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100355777A CN100536383C (en) | 2005-06-24 | 2005-06-24 | Ip transmission system and method thereof |
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| CNB2005100355777A CN100536383C (en) | 2005-06-24 | 2005-06-24 | Ip transmission system and method thereof |
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| CN1885760A CN1885760A (en) | 2006-12-27 |
| CN100536383C true CN100536383C (en) | 2009-09-02 |
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| CN102377607B (en) * | 2010-08-06 | 2014-08-06 | 华为技术有限公司 | Data transmission method and data transmission device for special two-layer virtual network |
| CN103414654B (en) * | 2013-08-26 | 2017-03-29 | 深圳市德传技术有限公司 | One kind realizes bandwidth shunt method and system |
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Effective date of registration: 20211229 Address after: 450046 Floor 9, building 1, Zhengshang Boya Plaza, Longzihu wisdom Island, Zhengdong New Area, Zhengzhou City, Henan Province Patentee after: Super fusion Digital Technology Co.,Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |
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