CN103560954A - Network with multiple paths among nodes and nodes applied to network - Google Patents
Network with multiple paths among nodes and nodes applied to network Download PDFInfo
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- CN103560954A CN103560954A CN201310495042.2A CN201310495042A CN103560954A CN 103560954 A CN103560954 A CN 103560954A CN 201310495042 A CN201310495042 A CN 201310495042A CN 103560954 A CN103560954 A CN 103560954A
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Abstract
The invention relates to a network with multiple paths among nodes and the nodes applied to the network and provides the network (1) comprising multiple nodes (2,3,4). The nodes comprise the first node (A) and the second node (B). The first node (A) and the second node (B) are connected by passing the node network (1) through the first path (2) and the second path (3). The first path is different from the second path. The network (1) is provided with a first operation mode and a second operation mode. Under the first mode (108), services between the first node and the second node are transmitted by the first path (2) instead of the second path (3). Under the second mode (106), the services are transmitted by the first path (2) and the second path (3). The network (1) comprises a mode selector (10) which is set to select from the operation modes according to demand grades of the services between the first node (A) and the second node (B).
Description
Female case applying date of originally dividing an application is that October 31, application number in 2007 are 200780101373.6, denomination of invention is " between node, have the network in a plurality of paths and for the node of such network ".
Technical field
The present invention relates to network, the method for network node and operational network wherein provides at least two paths between two nodes of network.
Background technology
Network service is known.In network, conventionally expect by network from source node transport service (traffic) to destination node.In order to ensure such node between communication reliability, for communication channel provide protection be well-known.
In this scheme, the main connection by network is established.Protection connection is got by the different paths of network and is also established.Protection connection is not used under normal circumstances.It only, because the loss of signal, Loss of continuity, error rate increase, just starts in the situation of the main Joint failure that frame losing etc. causes to work.
Single protection connects and can be exclusively used in specific main connection (1:1 protection) or can between a plurality of main connections, share (1:n), this depend on keep given connection importance how.G.808.1 with in G841 this type of protection scheme is described to some extent in International Telecommunication Union's recommendation number, and therefore it be openly incorporated herein by reference.
Summary of the invention
According to a first aspect of the invention, a kind of network that comprises a plurality of nodes is provided, described a plurality of node comprises first node and Section Point, the first and second nodes are connected by meshed network via the first path and the second path, the first and second paths are different, wherein network has the first and second operator schemes, business under first mode between the first and second nodes is not by the first path and by the second path transmission, under the second pattern, business is by the first and second path transmissions, wherein, network comprises mode selector, its demand levels (demanded level) that is arranged to the business based between the first and second nodes is carried out select operating mode.
Therefore, this can be counted as mainly with the first path, transmitting data, and only uses where necessary the second path.In a particularly advantageous embodiment; the second path comprises Protection path; make network there is the 3rd operator scheme; business under the 3rd operator scheme between the first and second nodes is only sent out by the second path, selects this pattern in the situation that wherein mode selector being arranged to have fault on the first path.By these modes, can not use out of order time be the known Protection path of free time originally, and Protection path plays a role in the situation that fault occurs.
The first and second paths can be different; They can travel through the different sets of (traverse) intermediate node and pass through network.This is typical in Protection path.
The selection that depends on other operator scheme of business demand level can be depended on the speed of the data that reception will be by link transmission.For example, can adopt receive the simple computation of the speed of data with regard to this link.Therefore mode selector can comprise the comparison means for speed and threshold value are compared; If surpassing threshold value, speed can select the second operator scheme so.Threshold value can be a part for the available bandwidth in the first path, for example 80% or 100%.
Network may further include priority and specifies device (assignor), and it can be to the data allocations assigned priority between the first and second paths.In the situation that the second path comprises Protection path, the data that may be routed to the Protection path on the second path due to the fault in network with for may be assigned to the specified priority of the data in the second path due to business-level, compare and can there is higher priority.It is that the specified priority of data is by data allocations to the first or the second path that first node is preferably arranged to basis.
According to a second aspect of the invention, a kind of network node that sends data for the destination node to network is provided, this network node comprises first network interface and second network interface, wherein network node has the first and second operator schemes, at first mode lower network node, with first network interface, with second network interface, do not transmit the data of going to destination node, the data of going to destination node under the second pattern are transmitted by the first and second network interfaces, wherein network node comprises mode selector, its demand levels being arranged to based on going to the business of destination node is carried out select operating mode.
Equally, this allows in the situation that bypass footpath is selected in the service needed bypass footpath between this network node and destination node.Typically, in use, first network interface will be connected to the first path of spanning network and arrives destination node, and second network interface will be connected to the second path of spanning network and arrives destination node.
This network node can comprise protection switch (protection switch), whereby in the situation that the fault business that the link from first interface to destination node exists fault to go to destination node via second network interface, be sent out.In a particularly advantageous embodiment, the second path comprises Protection path, makes to exist in the first path under failure condition, to select the second operator scheme.By these modes, can not use out of order time be the known Protection path of free time originally, and Protection path plays a role in the situation that fault occurs.
The first and second paths can be different; They can travel through the different sets of intermediate node and pass through network.This is typical in Protection path.
The selection that depends on other operator scheme of business demand level can be depended on the speed of the data that reception will be by link transmission.For example, can adopt receive the simple computation of the speed of data with regard to this link.Therefore mode selector can comprise the comparison means for speed and threshold value are compared; If surpassing threshold value, speed can select the second operator scheme so.Threshold value can be a part for the available bandwidth in the first path, for example 80% or 100%.
Network may further include priority and specifies device, and it can be to the data allocations assigned priority between the first and second paths.In the situation that the second path comprises Protection path, the data that may be routed to the Protection path on the second path due to the fault in network with for may be assigned to the specified priority of the data in the second path due to business-level, compare and can there is higher priority.First node is preferably arranged to be based upon the specified priority of data by data allocations to the first or the second path.
According to a third aspect of the invention we, a kind of method of operational network is provided, this network comprises a plurality of nodes, described a plurality of node comprises first node and Section Point, the first and second nodes are connected by meshed network via the first path and the second path, the first and second paths are different
The method comprises: the network operation under the first and second operator schemes, business under first mode between the first and second nodes is not by the first path and by the second path transmission, under the second pattern, business is passed through the first and second path transmissions, and wherein the business-level based between the first and second nodes carrys out select operating mode.
Therefore, this can be counted as mainly with the first path, transmitting data, and only uses where necessary the second path.In a particularly advantageous embodiment; the second path comprises Protection path; make to make network in the 3rd mode of operation, the business under the 3rd operator scheme between the first and second nodes is only sent out by the second path, selects three-mode in the situation that of wherein there is fault on the first path.By these modes, can not use out of order time be the known Protection path of free time originally, and Protection path plays a role in the situation that fault occurs.
The first and second paths can be different; They can travel through the different sets of intermediate node and pass through network.This is typical in Protection path.
The selection that depends on other operator scheme of business demand level can be depended on the speed of the data that reception will be by link transmission.For example, can adopt receive the simple computation of the speed of data with regard to this link.Therefore mode selector can comprise the comparison means for speed and threshold value are compared; If surpassing threshold value, speed can select the second operator scheme so.Threshold value can be a part for the available bandwidth in the first path, for example 80% or 100%.
The method can comprise the step for the data allocations assigned priority between the first and second paths.In the situation that the second path comprises Protection path, the data that may be routed to the Protection path on the second path due to the fault in network with for may be assigned to the specified priority of the data in the second path due to business-level, compare and can there is higher priority.Preferably basis is that the specified priority of data is by data allocations to the first or the second path.
According to a forth aspect of the invention, provide a kind of operational network node to send the method for data to the destination node in network, network node comprises first network interface and second network interface, wherein the method is included in the first and second mode of operation and makes network node: at first mode lower network node, with first network interface, with second network interface, do not transmit the data of going to destination, the data of going to destination node under the second pattern are transmitted by the first and second network interfaces, wherein the rank based on going to the business of destination node is carried out preference pattern.
In addition, this allows in the situation that bypass footpath is selected in the service needed bypass footpath between this network node and destination node.Typically, in use, first network interface will be connected to the first path of spanning network and arrives destination node, and second network interface will be connected to the second path of spanning network and arrives destination node.
Network node can comprise protection switch, in the situation that the link from first interface to destination node exists fault, the fault business of going to destination node is sent out via second network interface whereby.In a particularly advantageous embodiment, the second path comprises Protection path, selects the second operator scheme in the situation that of making to have fault in the first path.By these modes, can not use out of order time be the known Protection path of free time originally, and Protection path plays a role in the situation that fault occurs.
The first and second paths can be different; They can travel through the different sets of intermediate node and pass through network.This is typical in Protection path.
The selection that depends on other operator scheme of business demand level can be depended on the speed of the data that reception will be by link transmission.For example, can adopt receive the simple computation of the speed of data with regard to this link.Therefore mode selector can comprise the comparison means for speed and threshold value are compared; If surpassing threshold value, speed can select the second operator scheme so.Threshold value can be a part for the available bandwidth in the first path, for example 80% or 100%.
The method can also comprise to the data allocations assigned priority between the first and second paths.In the situation that the second path comprises Protection path, the data that may be routed to the Protection path on the second path due to the fault in network with for may be assigned to the specified priority of the data in the second path due to business-level, compare and can there is higher priority.It is that the specified priority of data is by data allocations to the first or the second path that first node is preferably arranged to basis.
Arbitrary node of either side of the present invention can comprise a plurality of interfaces and the device being associated.The interface of node can comprise the interface of curstomer-oriented or network-oriented, and network interface above-mentioned can relate to any or all such interfaces.The outgoing interface that such interface can represent to enter the incoming interface of network or go out automatic network.Interface also can be connected to other networks, for network interconnection.
The behavior of mode selector or the selection of pattern can be controlled by network management device, and this equipment can be away from network node.This network management device can be arranged to optionally forbid the second operator scheme, so that the operator of this network can be so that network, node or method be returned to the operation of prior art protective circuit.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram of network according to an embodiment of the invention;
Fig. 2 shows flow chart, and this flow chart illustrates data and how to be assigned to the different links in Fig. 1.Embodiment
Fig. 1 of accompanying drawing shows network according to an embodiment of the invention.This comprises two network node A and the B connecting via network 1.Node is by two Path Connections, main path 2 and bypass footpath 3.Each path 2,3 comprises a plurality of intermediate nodes 4; Two paths the 2, the 3rd, different, because they travel through different intermediate nodes.Main path starts from the primary network interface 5 of node A, and terminates in the primary network interface 6 of Node B, and bypass footpath starts from the auxiliary network interface 7 of node A, and terminates in the auxiliary network interface 8 of Node B.
Node A can be connected by following any one agreement with B: SDH/SONET, Ethernet, MPLS or any packet-based host-host protocol.In known network configuration, from node A(as source node) communication service of going to Node B (as destination node) will send at main path 2 conventionally, unless break down on this path (if node for example in intermediate node 4 or an interface in primary network interface are out of service).In this case, instead, will be on bypass footpath 3 transmission business.In this case, bypass footpath can be counted as Protection path.
Yet this embodiment of the present invention depends on the following fact: the most of the time, bypass footpath will can not be used and therefore represent that bandwidth usage is not enough.Therefore,, once the bit rate of the business of going to Node B at node A place surpasses threshold value, just use bypass footpath.This has realized and when there is no fault, has used bypass footpath, thereby has utilized untapped bandwidth originally.This data volume that can be delivered to the primary network interface 5 at node A place by calculating realizes, once and surpass threshold value, just data exchange is arrived to bypass footpath 3.
In order to ensure still keeping rational elasticity (resiliency), designated high priority protection is not subject to the impact of the defective equipment of some tool (node or interface).Therefore the priority that, is switched to the data in bypass footpath 3 from main path 2 can be configured to lower than the priority that main path 2 lost efficacy.This priority can be carried out according to automatic protection exchange agreement, and for example G.808.1 ITU recommendation sets forth with G841.In the simple embodiment shown in Fig. 1 of accompanying drawing, this priority is optional, but technical staff will recognize that its necessity in larger network.
Therefore, the data allocations between different connection can be as shown in Fig. 2 of accompanying drawing.When receiving at node A place the data of going to Node B, on the processor 10 in node A, the software of operation will be used shown method that data allocations is arrived to main or auxiliary link 2,3.Whether normally first step 100 determines primary link operation.If not, in all data of step 102, will be sent out by auxiliary link so.If primary link moves, this software determines in step 104 whether the bit rate of going to the data of Node B from node A is greater than threshold value so.If so, at two links of step 106, all will be used so, and if not, in step 108, only use primary link so.
Claims (17)
1. a network that comprises a plurality of nodes, described a plurality of node comprises first node and Section Point, the first and second nodes are connected by meshed network via the first path and the second path, the first path and the second path are different, wherein, network has the first and second operator schemes, business under first mode between the first and second nodes is not transmitted by the second path by the first path, and business is transmitted by the first and second paths under the second pattern, wherein network comprises mode selector, its demand levels that is arranged to the business based between the first and second nodes is carried out select operating mode.
2. network according to claim 1; wherein the second path comprises Protection path; make network there is the 3rd operator scheme; business under the 3rd operator scheme between the first and second nodes is only sent out by the second path, selects this pattern in the situation that wherein mode selector being arranged to have fault on the first path.
3. according to the network described in aforementioned arbitrary claim, the speed of the data that reception will be by link transmission is depended in the selection of operator scheme that wherein depends on the demand levels of business.
4. according to the network described in aforementioned arbitrary claim, wherein said network also comprises priority appointment device, and described priority specifies device can operate to the data allocations assigned priority between the first and second paths.
5. a network node that sends data for the destination node to network, described network node comprises first network interface and second network interface, wherein network node has the first and second operator schemes, at first mode lower network node, with first network interface, with second network interface, do not transmit the data of going to destination, and the data of going to destination node under the second pattern are transmitted by the first and second network interfaces, wherein network node comprises mode selector, its demand levels being arranged to based on going to the business of destination node is carried out select operating mode.
6. network node according to claim 5, wherein first network interface can be connected to the first path of spanning network and arrive destination node; And second network interface can be connected to the second path of spanning network and arrive destination node.
7. according to the network node described in claim 5 or 6; wherein said network node comprises protection switch, whereby in the situation that the fault business that the link from first interface to destination node exists fault to go to destination node via second network interface, be sent out.
8. according to the network node described in arbitrary claim in claim 5 to 7, the speed of the data that reception will be by link transmission is depended in the selection of operator scheme that wherein depends on the demand levels of business.
9. according to the network node described in arbitrary claim in claim 5 to 8, wherein said network node also comprises priority appointment device, and described priority specifies device can operate to the data allocations assigned priority between the first and second paths.
10. the method for an operational network, described network comprises a plurality of nodes, and described a plurality of nodes comprise first node and Section Point, and the first and second nodes are connected by meshed network via the first path and the second path, the first path and the second path are different
Described method comprises: the network operation under the first and second operator schemes, business under first mode between the first and second nodes is not transmitted by the second path by the first path, and business is transmitted by the first and second paths under the second pattern, and wherein the business-level based between the first and second nodes carrys out select operating mode.
11. methods according to claim 10; wherein the second path comprises Protection path; make to make network in the 3rd mode of operation; business under the 3rd operator scheme between the first and second nodes is only sent out by the second path, and selects three-mode wherein there is fault on the first path in the situation that.
12. according to the method described in arbitrary claim in claim 10 to 11, and the speed of the data that reception will be by link transmission is depended in the selection of operator scheme that wherein depends on the demand levels of business.
Whether 13. methods according to claim 12, wherein surpass threshold value according to speed and select.
14. methods according to claim 13, wherein threshold value is a part for the available bandwidth in the first path.
15. according to the method described in arbitrary claim in claim 10 to 14, and wherein said method comprises to the step of the data allocations assigned priority between the first and second paths.
16. according to the method being subordinated to described in the claim 15 of claim 11, wherein due to the fault in network, may be routed to data on the second path and compare higher priority designated for may be assigned to the specified priority of the data in the second path due to business-level.
17. 1 kinds of operational network nodes are to send the method for data to the destination node in network, described network node comprises first network interface and second network interface, wherein said method is included in the first and second mode of operation and makes network node: at first mode lower network node, with first network interface, with second network interface, do not transmit the data of going to destination, and the data of going to destination node under the second pattern are transmitted by the first and second network interfaces, and wherein the rank based on going to the business of destination node is carried out preference pattern.
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| CN201310495042.2A CN103560954A (en) | 2007-10-31 | 2007-10-31 | Network with multiple paths among nodes and nodes applied to network |
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| CN201310495042.2A CN103560954A (en) | 2007-10-31 | 2007-10-31 | Network with multiple paths among nodes and nodes applied to network |
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