CN103746891A - Ring network access service protection method, device and system thereof - Google Patents
Ring network access service protection method, device and system thereof Download PDFInfo
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- CN103746891A CN103746891A CN201310723758.3A CN201310723758A CN103746891A CN 103746891 A CN103746891 A CN 103746891A CN 201310723758 A CN201310723758 A CN 201310723758A CN 103746891 A CN103746891 A CN 103746891A
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Abstract
The embodiment of the invention discloses a ring network access service protection method, a device and a system thereof. The method is implemented as follows: a first node receives a service message; the first node determines whether the first node itself is a ring-out node of the service message and whether it is the last node in a current forwarding channel; and if it is determined that the first node is the ring-out node of the service message instead of the last node in the current forwarding channel, the service message is copied and forwarded to the next node of the current forwarding channel, the service message is unpacked to obtain user data, and the user data is forwarded to a network node. According to the scheme of the embodiment, ring network protection and network side dual-homing protection are at the same level (both of them are ring network level). Thus, a new ring network access service protection scheme is provided, and problems of protection superposition and protection overlapping which are caused by implementation of ring network protection and dual-homing protection at different levels and the problem of PW OAM and APS resource wasting are solved.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of guard method of looped network access service, Apparatus and system.
Background technology
Along with operator progressively improves the requirement of network reliability, disaster tolerance ability, existing network is all the more strong for the demand of looped network protection and dual-homing protection.
Current looped network protection and dual-homing protection scheme have three kinds, specific as follows:
Option A, only there is looped network protection.
Option b, only there is dual-homing protection (that is: the protection of dual-homed access service).
Scheme C, there is looped network protection and dual-homing protection simultaneously.
The looped network protection that only has network side in option A, business side is the form of singly returning, and cannot guarantee the protection of business side; Option b is dual-homing protection scene, and existing network side protection, also have business side protection, but network side is only supported the effective protection to Single Point of Faliure; Although scheme C has possessed network side and business side protection simultaneously; can support the effective protection to two point or multipoint fault; but looped network protection and dual-homing protection are realized respectively in network layer and operation layer respectively; also: looped network protection levels different from dual-homing protection realize; therefore looped network protection and dual-homing protection superpose; and the protection of the network side of dual-homing protection and business are one to one, there is the overlapping situation of protection.In business of the every configuration of dual-homed node, need configure the dual-homing protection of a network side; take 4 pseudo-line (Pseudo Wire; PW) operation management maintain (Operation; Administration and Maintenance; OAM) resource and 1 APS agreement (Automatic Protection Switching; APS) resource, therefore PW OAM and the APS resource outside meeting occupying volume.
Based on aforementioned analysis, there is at present the scheme of looped network protection and dual-homing protection simultaneously, looped network protection and dual-homing protection be stack and there is the overlapping problem of protection, waste PW OAM and APS resource.
Summary of the invention
The embodiment of the present invention provides a kind of guard method, Apparatus and system of looped network access service, and for a kind of protection scheme of new looped network access service is provided, and solve protection stack and protect overlapping problem, and the problem of waste PW OAM and APS resource.
The embodiment of the present invention provides a kind of guard method of looped network access service on the one hand, comprising:
First node receives service message;
First node determine self be whether described service message go out link point, whether be last node in current forwarding channel;
If determine, first node is described service message goes out link point, and not last node in current forwarding channel, copy the next node that described service message is transmitted to current forwarding channel, and described service message is carried out to decapsulation and obtain user data, to user data described in target node, described network node is the node outside looped network.
In conjunction with implementation on the one hand, in the possible implementation of the first, described method, also comprises:
If determine, first node is described service message goes out link point, and is last node in current forwarding channel, described service message is carried out to decapsulation and obtains user data, to user data described in target node.
In conjunction with implementation on the one hand, or the possible implementation of the first on the one hand, in the possible implementation of the second, described network node has two, describedly to user data described in target node, comprises:
To two network nodes, forward respectively described user data.
The embodiment of the present invention two aspects provide a kind of guard method of looped network access service, comprising:
Section Point receives user data;
Section Point is that described user data encapsulated tags obtains service message and configures forwarding channel; Described forwarding channel has indicated routing direction and on described routing direction two to go out link point;
Section Point forwards described service message to the main channel of forwarding channel indication;
If Section Point detects main channel, direction breaks down, and according to APS agreement, carries out and switches, and to alternate channel, forwards described service message.
In conjunction with the implementation of two aspects, in the possible implementation of the first, described method, also comprises:
In forward described service message process to alternate channel, if main channel detected, recover normal, to main channel, forward described service message.
Embodiment of the present invention three aspects: provides a kind of guard method of looped network access service, comprising:
Network node determines that whether normal master port communicate by letter with standby port, and described master port is that first on the main channel of forwarding channel indication of described network node and service message goes out to encircle the port of node communication; Described standby port is second port that goes out to encircle node communication on the main channel of forwarding channel indication of described network node and service message;
If master port communication is normal, from master port, receive the user data that goes out link point from looped network;
If master port communication failure, and standby port is normal, from standby port, receives the user data that goes out link point from looped network.
In conjunction with the implementation of three aspects:, in the possible implementation of the first, the described user data that goes out link point receiving from looped network from master port comprises:
Open master port and receive the user data from master port, close standby port; Or, receive the user data from master port, and receive the user data from standby port; Then delete the user data from standby port;
The described user data that goes out link point receiving from looped network from standby port comprises:
Open standby port and receive the user data from standby port, close master port; Or, receive the user data from master port, and receive the user data from standby port; Then delete the user data from master port.
In conjunction with the implementation of three aspects:, in the possible implementation of the second, from standby port, receiving the user data process that goes out link point from looped network, described method also comprises:
If it is normal master port communication recovery to be detected, continue to receive the user data that goes out link point from looped network from standby port, or, be switched to from master port and receive the user data that goes out link point from looped network.
The embodiment of the present invention four aspects provide a kind of node of looped network, comprising:
Message receiving element, for receiving service message;
Node determination unit, for determine self be whether described service message go out link point, whether be last node in current forwarding channel;
Forward control unit, if for described node determination unit determine from as described service message go out link point, and be not last node in current forwarding channel, copy the next node that described service message is transmitted to current forwarding channel; And described service message is carried out to decapsulation and obtain user data, to user data described in target node.
Implementation in conjunction with four aspects, in the possible implementation of the first, described forwarding control unit, if also for described node determination unit determine first node be described service message go out link point, and be last node in current forwarding channel, described service message is carried out to decapsulation and obtain user data, to user data described in target node.
In conjunction with the implementation of four aspects, or the possible implementation of the first of four aspects, in the possible implementation of the second, described network node has two, and described forwarding control unit, for forwarding respectively described user data to two network nodes.
The embodiment of the present invention five aspects provide a kind of node of looped network, comprising:
Data receiver unit, for receiving user data;
Encapsulation unit, the user data encapsulated tags that is used to described data receiver unit to receive obtains service message and configures forwarding channel; Described forwarding channel has indicated routing direction and on described routing direction two to go out link point;
Retransmission unit, forwards for the main channel to forwarding channel indication the service message that described encapsulation unit obtains; If Section Point detects main channel, direction breaks down, and according to APS agreement, carries out and switches, and to alternate channel, forwards described service message.
In conjunction with the implementation of five aspects, in the possible implementation of the first, described retransmission unit, also for forwarding described service message process to alternate channel, recovers normal if main channel detected, to main channel, forwards described service message.
The embodiment of the present invention six aspects provide a kind of network node, and described network node is the node outside looped network, it is characterized in that, comprising:
Port determining unit, for determining that whether normal master port communicate by letter with standby port, described master port is that first on the forwarding channel of described network node and the service message main channel of indicating goes out to encircle the port of node communication; Described standby port is second port that goes out to encircle node communication on the main channel of forwarding channel indication of described network node and service message;
Receiving data units, if normal for master port communication, receives the user data that goes out link point from looped network from master port; If master port communication failure, and standby port is normal, from standby port, receives the user data that goes out link point from looped network.
In conjunction with the implementation of six aspects, in the possible implementation of the first, described receiving data units, comprising:
Port controlling unit and the first receiving element, or, the second receiving element and data selection unit;
Described port controlling unit, if normal for master port communication, open master port and closes standby port; If master port communication failure, and standby port is normal, closes master port and opens standby port;
Described the first receiving element, receives the user data from master port for the master port from opening; Or, from the standby port of opening, receive the user data from standby port;
Described the second receiving element, for receiving the user data from master port, and receives the user data from standby port;
Described data selection unit, if for master port communication failure, and standby port is normal, the user data from master port described the second receiving element being received is deleted; If master port communication is normal, the user data from standby port described the second receiving element being received is deleted.
Implementation in conjunction with six aspects, in the possible implementation of the second, described receiving data units, also for receiving the user data process that goes out link point from looped network from standby port, if it is normal master port communication recovery to be detected, continue to receive the user data that goes out link point from looped network from standby port, or, be switched to from master port and receive the user data that goes out link point from looped network.
The embodiment of the present invention seven aspects provide a kind of system of protection of looped network access service, comprising: the looped network that comprises at least three nodes, comprises one and enter link point, two and go out link point in looped network; Network node, described network node is the node outside looped network, the described node that enters the looped network that link point provides for the embodiment of the present invention, described in go out the node of the looped network that link point provides for the embodiment of the present invention, the network node that described network node provides for the embodiment of the present invention.
In conjunction with the implementation of seven aspects, in the possible implementation of the second, described network node has two; Describedly go out the network node that link point provides for the embodiment of the present invention.
As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages: in the forwarding channel of this scheme, being configured more than one and having gone out link point, is not that the node of last node will continue to forward along forwarding channel by duplication service message; So on this forwarding channel, each go out link point all can deblocking service message forwarding data to network controller.Hence one can see that; in the present embodiment scheme, the dual-homing protection of looped network protection and network side is with level (being all looped network level); therefore a kind of protection scheme of new looped network access service is provided; and solved and realize the protection stack causing and protect overlapping problem in different levels because of looped network protection and dual-homing protection, and the problem of waste PW OAM and APS resource.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly introduced, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Figure 1A is embodiment of the present invention method flow schematic diagram;
Figure 1B is embodiment of the present invention method flow schematic diagram;
Fig. 1 C is embodiment of the present invention method flow schematic diagram;
Fig. 2 is that embodiment of the present invention looped network protection service message flows to schematic diagram;
Fig. 3 is that embodiment of the present invention looped network protection service message flows to schematic diagram;
Fig. 4 is that embodiment of the present invention looped network protection service message flows to schematic diagram;
Fig. 5 is that embodiment of the present invention looped network protection service message flows to schematic diagram;
Fig. 6 is that embodiment of the present invention looped network protection service message flows to schematic diagram;
Fig. 7 is that embodiment of the present invention looped network protection service message flows to schematic diagram;
Fig. 8 is that embodiment of the present invention looped network protection service message flows to schematic diagram;
Fig. 9 is the node structure schematic diagram of embodiment of the present invention looped network;
Figure 10 is the node structure schematic diagram of embodiment of the present invention looped network;
Figure 11 is embodiment of the present invention network node structure schematic diagram;
Figure 12 is embodiment of the present invention network node structure schematic diagram;
Figure 13 is embodiment of the present invention network node structure schematic diagram;
Figure 14 is embodiment of the present invention looped network node structural representation;
Figure 15 is embodiment of the present invention looped network node structural representation;
Figure 16 is embodiment of the present invention network node structure schematic diagram;
Figure 17 is embodiment of the present invention system configuration schematic diagram.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making all other embodiment that obtain under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of guard method of looped network access service, as shown in Figure 1A, comprising:
101A: first node receives service message;
In order to distinguish the node on looped network, used " first " and " second " to distinguish node, " first " and " second " only, for distinguishing dissimilar node, should not be construed as other technologies implication.Wherein first node is link point, and Section Point is into link point.The service message that first node receives can be to adopt looped network related protocol to forward the service message of coming, and subsequent embodiment will be described in more detail.
102A: first node determine self be whether above-mentioned service message go out link point, whether be last node in current forwarding channel;
In this step, determine whether out link point, can determine according to the passage configuration of service message, can follow the regulation of the related protocol of looped network protection, in subsequent embodiment, will have more detailed description.Above-mentioned current forwarding channel is the forwarding channel that above-mentioned service message is corresponding.In above-mentioned forwarding channel, dispose at least two and go out link point.The configuration information of forwarding channel has been indicated the forward-path of service message on looped network, for example, in the configuration information of the forwarding channel shown in Fig. 2, will configure following information: service message has node 1,2 and 3 through node; And service message from node 1 pressed on ring through node be followed successively by: 1,2 and 3, and configuration node 3 is the information that link point.Node 2 can determine that forwarding channel also has descendant node according to the configuration information of forwarding channel so, also: also need to continue to forward; And node 3 will be determined from as going out link point according to the configuration information of forwarding channel, and forwarding channel does not have descendant node, that is: last node that node 3 configures for forwarding channel.
103A: first node is above-mentioned service message if determine goes out link point, and not last node in current forwarding channel, copy the next node that above-mentioned service message is transmitted to current forwarding channel, and above-mentioned service message is carried out to decapsulation and obtain user data, to the above-mentioned user data of target node, above-mentioned network node is the node outside looped network.
Node outside looped network can be the destination node of the user data that the decapsulation of link point obtains and go out first node on the path between link point.What concrete this network node is, is not that the embodiment of the present invention is paid close attention to.In subsequent embodiment, by usining the example of network node (Radio Network Controller, RNC) as this network node, describe.
In the forwarding channel of embodiment of the present invention scheme, being configured more than one and having gone out link point, is not that the node of last node will continue to forward along forwarding channel by duplication service message; So on this forwarding channel, each go out link point all can deblocking service message forwarding data to network controller.Hence one can see that; in the present embodiment scheme, the dual-homing protection of looped network protection and network side is with level (being all looped network level); therefore provide a kind of protection scheme of new looped network access service, and solved protection stack and protected overlapping problem, can save PW OAM and APS resource.
Further, the first node in the present embodiment is as going out link point, can also use as last node of forwarding channel, and said method so, also comprises:
If determine, first node is above-mentioned service message goes out link point, and is last node in current forwarding channel, above-mentioned service message is carried out to decapsulation and obtains user data, to the above-mentioned user data of target node.
The embodiment of the present invention can also be at User Network Interface (User-Network Interface; UNI) side configures dual-homed protection; so above-mentioned network node has two, above-mentionedly to the above-mentioned user data of target node, comprises: to two network nodes, forward respectively above-mentioned user data.
The embodiment of the present invention also provides the guard method of another kind of looped network access service, as shown in Figure 1B, comprising:
101B: Section Point receives user data;
102B: Section Point is that above-mentioned user data encapsulated tags obtains service message and configures forwarding channel; Above-mentioned forwarding channel has indicated routing direction and on above-mentioned routing direction two to go out link point;
103B: Section Point forwards above-mentioned service message to the main channel of forwarding channel indication; If Section Point detects main channel, direction breaks down, and according to APS agreement, carries out and switches, and to alternate channel, forwards above-mentioned service message.
In the forwarding channel of embodiment of the present invention scheme, being configured more than one and having gone out link point, is not that the node of last node will continue to forward along forwarding channel by duplication service message; So on this forwarding channel, each go out link point all can deblocking service message forwarding data to network controller.Hence one can see that; in the present embodiment scheme, the dual-homing protection of looped network protection and network side is with level (being all looped network level); therefore provide a kind of protection scheme of new looped network access service, and solved protection stack and protected overlapping problem, can save PW OAM and APS resource.
Further, the embodiment of the present invention also provides the processing scheme that in the process that adopts alternate channel forwarding service message, recover main channel, specific as follows: said method, also comprises:
In forward above-mentioned service message process to alternate channel, if main channel detected, recover normal, to main channel, forward above-mentioned service message.
The embodiment of the present invention also provides the guard method of another kind of looped network access service, as shown in Figure 1 C, comprising:
101C: network node determines that whether normal master port communicate by letter with standby port, and above-mentioned master port is that first on the main channel of forwarding channel indication of above-mentioned network node and service message goes out to encircle the port of node communication; Above-mentioned standby port is second port that goes out to encircle node communication on the main channel of forwarding channel indication of above-mentioned network node and service message;
102C: if master port communication is normal, receive the user data that goes out link point from looped network from master port; If master port communication failure, and standby port is normal, from standby port, receives the user data that goes out link point from looped network.
In the forwarding channel of embodiment of the present invention scheme, being configured more than one and having gone out link point, is not that the node of last node will continue to forward along forwarding channel by duplication service message; So on this forwarding channel, each go out link point all can deblocking service message forwarding data to network controller.Network controller selects receipts to two data that go out the transmission of link point.Hence one can see that; in the present embodiment scheme, the dual-homing protection of looped network protection and network side is with level (being all looped network level); therefore provide a kind of protection scheme of new looped network access service, and solved protection stack and protected overlapping problem, can save PW OAM and APS resource.
Alternatively, the above-mentioned user data that goes out link point receiving from looped network from master port comprises: open master port and receive the user data from master port, close standby port; Or, receive the user data from master port, and receive the user data from standby port; Then delete the user data from standby port;
The above-mentioned user data that goes out link point receiving from looped network from standby port comprises: open standby port and receive the user data from standby port, close master port; Or, receive the user data from master port, and receive the user data from standby port; Then delete the user data from master port.
Further, the embodiment of the present invention also provides choosing to receive in user data process, the scheme of switching of fault recovery, specific as follows: from standby port, to receive the user data process that goes out link point from looped network, also comprise: if it is normal master port communication recovery to be detected, continue to receive the user data that goes out link point from looped network from standby port, or, be switched to from master port and receive the user data that goes out link point from looped network.
Following examples describe the dual-homed access service of looped network protection of take based on multiprotocol label switching (Multi Protocol Label Switching, MPLS) as example.The present embodiment; realize 1 MPLS looped network protection of configuration for the device level redundancy backup of N bar service access; saved the OAM(Operation additionally taking due to protection stack simultaneously; Administration and Maintenance; operation management maintain) and APS(Automatic Protection Switching, APS agreement) resource.In the present embodiment, to take radio network controller (Radio Network Controller, RNC) be example to network node.
The main flow process of the embodiment of the present invention is as follows: based on business trend, divide 2 sub-process descriptions: one, suppose that business enters backward radio network controller (Radio Network Controller from access side joint, RNC) send, flow process is: 1, based on looped network protection, forward; 2, configure looped network protection Virtual Channel and copy and forward by Virtual Channel; 3, dual-homed node traffic forwards; This flow process is main point of application of the present invention.Two, the opposite direction transmitting procedure of business is as follows: business flow process after RNC passes back to access side is: dual homed node access service, according to looped network forwarding standard, be forwarded to access side, the embodiment of the present invention does not describe in detail this.
Following examples are put up with above business and are elaborated respectively as follows from three aspects that access in the flow process sending to RNC side joint enters:
One, based on looped network protection, forward:
As shown in Figure 2, circle is expressed as looped network node, and the numbering 1～5 in circle represents the sequence number of node, Figure 2 shows that the looped network that 5 nodes form.Figure 2 shows that first the looped network protection of 5 nodes of configuration can adopt artificial mode all by same order (as clockwise), to configure loopful nodal information (RingMap) at each node; as: node 1 specifies 1,2,3; 4,5, node 2 specifies 2; 3,4,5; 1; by that analogy, in subsequent embodiment, Fig. 3～Fig. 8 also adopts this scheme, therefore in subsequent embodiment, repeats no longer one by one.The direction of arrow shown in Fig. 2 is business trend, the i.e. routing direction of service message.Node 1 is for entering link point, and node 3 is for going out link point.
During normal condition (during the normal fault-free of looped network), be illustrated in figure 3 the looped network protection forwarding process of many labels, business trend based on Fig. 2 configuration, user data (User Data) enters node 1 from looped network node 1 pressed on ring, looped network node 1 is User Data encapsulation PW, gap marker (tunnel), looped network label (Spr label3) forwards to looped network node 2 as service message, at node 2, carry out looped network label exchange, then to looped network node 3, forward, in Fig. 3, node 3 is lower circling point, when message arrives after node 3, remove successively looped network label, tunnel label, pw label, recovering User Data continues to forward downwards.Label1～label4 shown in Fig. 2 is ring members sign, does not represent label value.In looped network protection, label is indicated the forward-path of this object, and pw label represents customer service trend, and tunnel label represents to be carried on the pseudo-line trend of pw on tunnel, and ring label represents to be carried on the trend of the tunnel on ring.
If break down between the node on looped network 2 and node 3, looped network protection will be switched protection channel, as shown in Figure 4: service message is walked protection channel and forwarded to node 3, relate to message encapsulation change in service message repeating process.At node 1, enter the service message of ring, by node 1, to node 5, forwarded, node 5 encircles label exchange, then to looped network node 4, forward, looped network node carries out looped network label exchange and forwards with backward looped network node 3, and in Fig. 4, node 3 is lower circling point, when message arrives after node 3, remove successively looped network label, tunnel label, pw label, recover User Data and continue to forward downwards.
Above embodiment has introduced based on looped network protection and has forwarded scheme, and the label switch label encapsulation in forwarding process all can be followed the regulation of looped network protection related protocol.In subsequent embodiment, looped network protection related protocol regulation is also followed in label exchange, at formality embodiment Fig. 3～Fig. 8, no longer the specific implementation of label exchange is illustrated one by one.
Two, configure looped network protection Virtual Channel and copy and forward by Virtual Channel, dual-homed node traffic forwards:
In the present embodiment, configuration looped network protection Virtual Channel is specially: configuration ring dual homed Virtual Channel; By Virtual Channel, copy and forward, and encircle dual-homed node traffic forwarding.Be illustrated in fig. 5 shown below, basic network configuration is as follows:
A, configuration node 3 and node 4 are the dual-homed node of ring; That is: what node 3 and node 4 were service message goes out link point (also referred to as lower link point).
B, be configured to ring dual-homed node 3 ring dual homed work Virtual Channel SPR_VP_W, the dotted arrow direction that in Fig. 5, SPR_VP_W is corresponding.
C, ring dual homed work Virtual Channel arrive node 3 clockwise, then extend to node 4, i.e. two lower circling points of a passage.
D, be configured to ring dual-homed node 4 ring dual-homing protection Virtual Channel SPR_VP_P, the dotted arrow direction that in Fig. 5, SPR_VP_P is corresponding.
E, ring dual-homing protection Virtual Channel arrive node 4 counterclockwise, then extend to node 3, i.e. two lower circling points of a passage.
F, configuration UNI side dual-homing protection (optional); In Fig. 5, UNI side is for singly returning, i.e. a RNC(RNC_1).
G, RNC node must be that protection is received in active and standby choosing.Owing to encircling dual-homed node 3 and node 4, all to RNC, send User Data, RNC equipment need to select receives action, avoids the two receipts of business.
In above allocation plan; configuration requirement by above b, d is known: in the present embodiment scheme, the dual-homing protection of looped network protection and network side is with level (being all looped network level); and looped network protection in background technology and Tunnel APS, the PW APS of dual-homing protection are various levels, superpose.
Based on above configuration, below the forwarding process with regard to service message under various states is described as follows:
1, during normal condition, the routing direction of service message solid arrow direction as shown in Figure 5, specific as follows: user data (User Data) enters node 1 from looped network node 1 pressed on ring, looped network node 1 for User Data encapsulation pw, tunnel, ring dual homed Virtual Channel label after, as service message, walking to encircle dual homed work Virtual Channel SPR_VP_W forwards to looped network node 2, at node 2, encircle the exchange of dual homed Virtual Channel label, then walk to encircle dual homed work Virtual Channel SPR_VP_W and forward to looped network node 3, in Fig. 5, node 3 is the dual-homed node of ring.When message arrives after node 3, node 3 copies a service message, the extension passage that carries out walking to encircle after commutative ring dual homed Virtual Channel label dual homed work Virtual Channel SPR_VP_W is transmitted to the dual-homed peer node 4 of ring, then remove successively ring dual homed Virtual Channel label, tunnel, pw label, recover User Data and continue to forward to RNC_1.Meanwhile, encircle dual-homed node 4 and receive the service message forwarding from ring dual homed work Virtual Channel SPR_VP_W extension passage, remove successively ring dual homed Virtual Channel label, tunnel, pw label, recover User Data and continue to forward to RNC_1.Encircle dual-homed node 3 and node 4 and all to RNC, send User Data, RNC_1 equipment need to select receipts action, avoids the two receipts of business, supposes the message that choosing receipts node 3 is sent.As shown in Figure 5.
2, when node on the ring 2 and 3 of nodes break down; the routing direction of service message solid arrow direction as shown in Figure 6; specific as follows: User Data is from node 1 pressed on ring; node 1 is walked to encircle dual-homing protection Virtual Channel SPR_VP_P after for User Data encapsulation pw, tunnel, ring dual homed Virtual Channel label and is forwarded to looped network node 5; at node 5, encircle the exchange of dual homed Virtual Channel label; then walk to encircle dual-homing protection Virtual Channel SPR_VP_P and forward to looped network node 4, in figure, node 4 is the dual-homed node of ring.When message arrives after node 4; copy and walk to encircle dual-homing protection Virtual Channel SPR_VP_P after a message switching ring dual homed Virtual Channel label and extend passage and be transmitted to the dual-homed peer node 3 of ring; then remove successively ring dual homed Virtual Channel label, tunnel, pw label, recover User Data and continue to forward to RNC_1.Meanwhile, encircle dual-homed node 3 and receive the message forwarding from ring dual-homing protection Virtual Channel SPR_VP_P extension passage, remove successively ring dual homed Virtual Channel label, tunnel, pw label, recover User Data and continue to forward to RNC.Encircle dual-homed node 4 and node 3 and all to RNC_1, send User Data, RNC_1 equipment selects receipts action, and the message that node 3 is sent is received in choosing, avoids the two receipts of business, can avoid service disconnection simultaneously.
3, when link occurs fault between node on the ring 3 and RNC_1, the routing direction of service message solid arrow direction as shown in Figure 7, specific as follows: network side looped network forwards and forwards under normal circumstances similar, difference is only that the User Data RNC_1 that node 3 forwards cannot receive, and the present embodiment repeats no more this flow process.In business side, RNC_1 detects link failure triggering and switches, and now RNC_1 is switched to standby port choosing and receives the business that node 4 is sent, and has avoided service disconnection.As from the foregoing: service message is that node 3 is copied to node 4 by ring dual homed Virtual Channel, therefore relates to service path and switches.In the business side shown in Fig. 7, there are RNC_1 and RNC_2, because the link between node 3 and RNC_2 is normal, therefore RNC_2 does not switch, RNC_2 can receive the business that node 3 is sent, also can receive the business that node 4 is sent, can still select receive original route business, therefore do not relate to service path and switch.MPLS ring in the embodiment of the present invention that hence one can see that can supply N(N >=2) conclusion that is independent of each other of individual service access and business.
4, when there is node failure in the dual-homed node of ring 3, the routing direction of service message solid arrow direction as shown in Figure 8, specific as follows: network side forward with network side fault (shown in Fig. 6) situation under forward similarly, repeat no more; Difference is that node 3 cannot receive message and E-Packet to TNC_1.At business side RNC_1, link failure triggering detected and switch, now RNC is switched to standby port choosing and receives the business that node 4 is sent, and has avoided service disconnection.Forwarding process is as shown below.Illustrate: due to the whole node failure of node 3, therefore node 3 cannot receive the message of being sent by node 4 by the ring dual-homing protection Virtual Channel extending.
More than introduced by Virtual Channel and copied and forward and encircle the idiographic flow that dual-homed node traffic forwards, the present embodiment also provides business side to select being implemented as follows of debit's case:
1, when network side fault recovery, embodiment of the present invention business side selects debit's formula constant, and network side can recover according to looped network protection standard.
In the present embodiment, if configuration looped network protection is recovery formula, when looped network protection switchback arrives work; business forwards by normal condition; walk to encircle dual homed work Virtual Channel and mail to RNC, encircle dual-homed node 3 and carry out copy packet and send to peer node 4, and be transmitted to RNC.Peer node 4 is received after message, also issues RNC, and RNC selects receipts, relates to service path and switches; On the contrary, there is not switchback in network side, and service path is constant.
2, when business side fault recovery, this programme network side is constant, when business side detects fault recovery, is divided into two kinds of situations: recovery formula and Non revertive.If recovery formula, RNC switchback is carried out business reception to master port, and the message that the dual-homed node 3 of ring is sent is received in choosing, and this will relate to service path and switch; Otherwise there is not switchback in RNC, at standby port, receive message, the message that ring dual homed node 4 is sent is received in choosing, and service path is constant so.
The embodiment of the present invention, based on G.8132 ring protection, has been filled up the current not blank of the dual-homed access based on MPLS ring protection, and the present invention can realize the service access based on MPLS ring protection and dual-homed same level.
The embodiment of the present invention also provides a kind of node of looped network, and the node of this looped network is used as going out link point, as shown in Figure 9, comprising:
Message receiving element 901, for receiving service message;
Node determination unit 902, for determine self be whether above-mentioned service message go out link point, whether be last node in current forwarding channel;
Forward control unit 903, if for above-mentioned node determination unit 902 determine from as above-mentioned service message go out link point, and be not last node in current forwarding channel, copy the next node that above-mentioned service message is transmitted to current forwarding channel; And above-mentioned service message is carried out to decapsulation and obtain user data, to the above-mentioned user data of target node, above-mentioned network node is the node outside looped network.
In the forwarding channel of embodiment of the present invention scheme, being configured more than one and having gone out link point, is not that the node of last node will continue to forward along forwarding channel by duplication service message; So on this forwarding channel, each go out link point all can deblocking service message forwarding data to network controller.Hence one can see that; in the present embodiment scheme, the dual-homing protection of looped network protection and network side is with level (being all looped network level); therefore provide a kind of protection scheme of new looped network access service, and solved protection stack and protected overlapping problem, can save PW OAM and APS resource.
Further, above-mentioned forwarding control unit 903, if that also determines for above-mentioned node determination unit 902 that first node is above-mentioned service message goes out link point, and be last node in current forwarding channel, above-mentioned service message is carried out to decapsulation and obtain user data, to the above-mentioned user data of target node.
Alternatively, above-mentioned network node has two, and above-mentioned forwarding control unit 903, for forwarding respectively above-mentioned user data to two network nodes.
The embodiment of the present invention also provides the node of another kind of looped network, as shown in figure 10, comprising:
In the forwarding channel of embodiment of the present invention scheme, being configured more than one and having gone out link point, is not that the node of last node will continue to forward along forwarding channel by duplication service message; So on this forwarding channel, each go out link point all can deblocking service message forwarding data to network controller.Hence one can see that; in the present embodiment scheme, the dual-homing protection of looped network protection and network side is with level (being all looped network level); therefore provide a kind of protection scheme of new looped network access service, and solved protection stack and protected overlapping problem, can save PW OAM and APS resource.
Further, above-mentioned retransmission unit 1003, also for forwarding above-mentioned service message process to alternate channel, recovers normal if main channel detected, to main channel, forwards above-mentioned service message.
The embodiment of the present invention also provides a kind of network node, and above-mentioned network node is the node outside looped network, as shown in figure 11, comprising:
Port determining unit 1101, for determining that whether normal master port communicate by letter with standby port, above-mentioned master port is that first on the forwarding channel of above-mentioned network node and the service message main channel of indicating goes out to encircle the port of node communication; Above-mentioned standby port is second port that goes out to encircle node communication on the main channel of forwarding channel indication of above-mentioned network node and service message;
Receiving data units 1102, if normal for master port communication, receives the user data that goes out link point from looped network from master port; If master port communication failure, and standby port is normal, from standby port, receives the user data that goes out link point from looped network.
In the forwarding channel of embodiment of the present invention scheme, being configured more than one and having gone out link point, is not that the node of last node will continue to forward along forwarding channel by duplication service message; So on this forwarding channel, each go out link point all can deblocking service message forwarding data to network controller.Hence one can see that; in the present embodiment scheme, the dual-homing protection of looped network protection and network side is with level (being all looped network level); therefore provide a kind of protection scheme of new looped network access service, and solved protection stack and protected overlapping problem, can save PW OAM and APS resource.
Alternatively, above-mentioned receiving data units 1102, comprising:
As shown in figure 12, port controlling unit 1201 and the first receiving element 1202, or, as shown in figure 13, the second receiving element 1301 and data selection unit 1302;
Above-mentioned port controlling unit 1201, if normal for master port communication, open master port and closes standby port; If master port communication failure, and standby port is normal, closes master port and opens standby port;
Above-mentioned the first receiving element 1202, receives the user data from master port for the master port from opening; Or, from the standby port of opening, receive the user data from standby port;
Above-mentioned the second receiving element 1301, for receiving the user data from master port, and receives the user data from standby port;
Above-mentioned data selection unit 1302, if for master port communication failure, and standby port is normal, the user data from master port above-mentioned the second receiving element 1301 being received is deleted; If master port communication is normal, the user data from standby port above-mentioned the second receiving element 1301 being received is deleted.
Further, above-mentioned receiving data units 1102, also for receiving the user data process that goes out link point from looped network from standby port, if it is normal master port communication recovery to be detected, continue to receive the user data that goes out link point from looped network from standby port, or, be switched to from master port and receive the user data that goes out link point from looped network.
The embodiment of the present invention also provides a kind of looped network node, as shown in figure 14, comprising: receiver 1401, reflector 1402, processor 1403 and memory 1404;
Wherein, above-mentioned processor 1403, for receiving service message by receiver 1401; Determine self be whether above-mentioned service message go out link point, whether be last node in current forwarding channel; If determine from going out link point as above-mentioned service message, and not last node in current forwarding channel, copy above-mentioned service message and by reflector 1402, be transmitted to the next node of current forwarding channel, and above-mentioned service message is carried out to decapsulation and obtain user data, by reflector 1402, to the above-mentioned user data of target node, above-mentioned network node is the node outside looped network.
In the forwarding channel of embodiment of the present invention scheme, being configured more than one and having gone out link point, is not that the node of last node will continue to forward along forwarding channel by duplication service message; So on this forwarding channel, each go out link point all can deblocking service message forwarding data to network controller.Hence one can see that; in the present embodiment scheme, the dual-homing protection of looped network protection and network side is with level (being all looped network level); therefore provide a kind of protection scheme of new looped network access service, and solved protection stack and protected overlapping problem, can save PW OAM and APS resource.
Further, above-mentioned processor 1403, if also for determine from as above-mentioned service message go out link point, and be last node in current forwarding channel, above-mentioned service message is carried out to decapsulation and obtains user data, by reflector 1402 to the above-mentioned user data of target node.
Alternatively, above-mentioned network node has two, and above-mentioned processor 1403, for comprising to the above-mentioned user data of target node by reflector 1402: for forwarding respectively above-mentioned user data by reflector 1402 to two network nodes.
The embodiment of the present invention also provides another kind of looped network node, as shown in figure 15, comprising: receiver 1501, reflector 1502, processor 1503 and memory 1504;
Wherein, processor 1503, for receiving user data by receiver 1501; For above-mentioned user data encapsulated tags obtains service message and configures forwarding channel; Above-mentioned forwarding channel has indicated routing direction and on above-mentioned routing direction two to go out link point; The main channel of indicating to forwarding channel by reflector 1502 forwards above-mentioned service message; If Section Point detects main channel, direction breaks down, and according to APS agreement, carries out and switches, and by reflector 1502, to alternate channel, forwards above-mentioned service message.
In the forwarding channel of embodiment of the present invention scheme, being configured more than one and having gone out link point, is not that the node of last node will continue to forward along forwarding channel by duplication service message; So on this forwarding channel, each go out link point all can deblocking service message forwarding data to network controller.Hence one can see that; in the present embodiment scheme, the dual-homing protection of looped network protection and network side is with level (being all looped network level); therefore provide a kind of protection scheme of new looped network access service, and solved protection stack and protected overlapping problem, can save PW OAM and APS resource.
Further, above-mentioned processor 1503, also for forwarding above-mentioned service message process to alternate channel, recovers normal if main channel detected, by reflector 1502, to main channel, forwards above-mentioned service message.
The embodiment of the present invention also provides another kind of network node, and above-mentioned network node is the node outside looped network, as shown in figure 16, comprising: receiver 1601, reflector 1602, processor 1603 and memory 1604;
Wherein, processor 1603, for determining that whether normal master port communicate by letter with standby port, above-mentioned master port is that first on the forwarding channel of above-mentioned network node and the service message main channel of indicating goes out to encircle the port of node communication; Above-mentioned standby port is second port that goes out to encircle node communication on the main channel of forwarding channel indication of above-mentioned network node and service message; If master port communication is normal, by receiver 1601, from master port, receive the user data that goes out link point from looped network; If master port communication failure, and standby port is normal, by receiver 1601, from standby port, receives the user data that goes out link point from looped network.
In the forwarding channel of embodiment of the present invention scheme, being configured more than one and having gone out link point, is not that the node of last node will continue to forward along forwarding channel by duplication service message; So on this forwarding channel, each go out link point all can deblocking service message forwarding data to network controller.Network controller selects receipts to two data that go out the transmission of link point.Hence one can see that; in the present embodiment scheme, the dual-homing protection of looped network protection and network side is with level (being all looped network level); therefore provide a kind of protection scheme of new looped network access service, and solved protection stack and protected overlapping problem, can save PW OAM and APS resource.
Alternatively, above-mentioned processor 1603, comprises for the user data that goes out link point receiving from looped network from master port by receiver 1601: the user data receiving from master port by receiver 1601 for opening master port, close standby port; Or, the user data receiving from master port by receiver 1601, and receive the user data from standby port; Then delete the user data from standby port;
Above-mentioned processor 1603, comprises for the user data that goes out link point receiving from looped network from standby port by receiver 1601: open the user data that standby port receives from standby port by receiver 1601, close master port; Or, the user data receiving from master port by receiver 1601, and receive the user data from standby port; Then delete the user data from master port.
Further, above-mentioned processor 1603, by receiver 1601, from standby port, receiving the user data process that goes out link point from looped network, also normal for if master port communication recovery being detected, continue from standby port, to receive the user data that goes out link point from looped network by receiver 1601, or, be switched to the user data that goes out link point receiving from looped network by receiver 1601 from master port.
The embodiment of the present invention also provides a kind of system of protection of looped network access service, as shown in figure 17, comprising: the looped network that comprises at least three nodes, comprises one and enter link point 1701, two and go out link point 1702 in looped network; Network node 1703, above-mentioned network node is the node outside looped network, wherein, above-mentionedly enter link point 1701 for the node shown in Figure 10 as shown in the embodiment of the invention, above-mentionedly go out link point for the node of Fig. 9 as shown in the embodiment of the invention, above-mentioned network node is the network node of Figure 11～12 any one as shown in the embodiment of the invention.Also can be as follows: above-mentionedly enter link point 1701 for the node shown in Figure 15 as shown in the embodiment of the invention, above-mentionedly go out link point 1702 for the node of Figure 14 as shown in the embodiment of the invention, above-mentioned network node 1703 is the network node of Figure 16 as shown in the embodiment of the invention.Corresponding to different, go out link point, network node 1703 numbers can have one or two.
In the forwarding channel of embodiment of the present invention scheme, being configured more than one and having gone out link point, is not that the node of last node will continue to forward along forwarding channel by duplication service message; So on this forwarding channel, each go out link point all can deblocking service message forwarding data to network controller.Network controller selects receipts to two data that go out the transmission of link point.Hence one can see that; in the present embodiment scheme, the dual-homing protection of looped network protection and network side is with level (being all looped network level); therefore provide a kind of protection scheme of new looped network access service, and solved protection stack and protected overlapping problem, can save PW OAM and APS resource.
It should be noted that in above-described embodiment, included unit is just divided according to function logic, but is not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional unit also, just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
In addition, one of ordinary skill in the art will appreciate that all or part of step realizing in above-mentioned each embodiment of the method is to come the hardware that instruction is relevant to complete by program, corresponding program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
These are only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the present invention discloses, the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (18)
1. a guard method for looped network access service, is characterized in that, comprising:
First node receives service message;
First node determine self be whether described service message go out link point, whether be last node in current forwarding channel;
If determine, first node is described service message goes out link point, and not last node in current forwarding channel, copy the next node that described service message is transmitted to current forwarding channel, and described service message is carried out to decapsulation and obtain user data, to user data described in target node, described network node is the node outside looped network.
2. method according to claim 1, is characterized in that, also comprises:
If determine, first node is described service message goes out link point, and is last node in current forwarding channel, described service message is carried out to decapsulation and obtains user data, to user data described in target node.
3. according to method described in claim 1 or 2, it is characterized in that, described network node has two, describedly to user data described in target node, comprises:
To two network nodes, forward respectively described user data.
4. a guard method for looped network access service, is characterized in that, comprising:
Section Point receives user data;
Section Point is that described user data encapsulated tags obtains service message and configures forwarding channel; Described forwarding channel has indicated routing direction and on described routing direction two to go out link point;
Section Point forwards described service message to the main channel of forwarding channel indication;
If Section Point detects main channel, direction breaks down, and according to APS agreement, carries out and switches, and to alternate channel, forwards described service message.
5. method according to claim 4, is characterized in that, also comprises:
In forward described service message process to alternate channel, if main channel detected, recover normal, to main channel, forward described service message.
6. a guard method for looped network access service, is characterized in that, comprising:
Network node determines that whether normal master port communicate by letter with standby port, and described master port is that first on the main channel of forwarding channel indication of described network node and service message goes out to encircle the port of node communication; Described standby port is second port that goes out to encircle node communication on the main channel of forwarding channel indication of described network node and service message;
If master port communication is normal, from master port, receive the user data that goes out link point from looped network;
If master port communication failure, and standby port is normal, from standby port, receives the user data that goes out link point from looped network.
7. method according to claim 6, is characterized in that, the described user data that goes out link point receiving from looped network from master port comprises:
Open master port and receive the user data from master port, close standby port; Or, receive the user data from master port, and receive the user data from standby port; Then delete the user data from standby port;
The described user data that goes out link point receiving from looped network from standby port comprises:
Open standby port and receive the user data from standby port, close master port; Or, receive the user data from master port, and receive the user data from standby port; Then delete the user data from master port.
8. method according to claim 6, is characterized in that, from standby port, is receiving the user data process that goes out link point from looped network, also comprises:
If it is normal master port communication recovery to be detected, continue to receive the user data that goes out link point from looped network from standby port, or, be switched to from master port and receive the user data that goes out link point from looped network.
9. a node for looped network, is characterized in that, comprising:
Message receiving element, for receiving service message;
Node determination unit, for determine self be whether described service message go out link point, whether be last node in current forwarding channel;
Forward control unit, if for described node determination unit determine from as described service message go out link point, and be not last node in current forwarding channel, copy the next node that described service message is transmitted to current forwarding channel; And described service message is carried out to decapsulation and obtain user data, to user data described in target node.
10. node according to claim 9, is characterized in that,
Described forwarding control unit, if also for described node determination unit determine first node be described service message go out link point, and be last node in current forwarding channel, described service message carried out to decapsulation and obtain user data, to user data described in target node.
11. according to node described in claim 9 or 10, it is characterized in that, described network node has two, and described forwarding control unit, for forwarding respectively described user data to two network nodes.
The node of 12. 1 kinds of looped networks, is characterized in that, comprising:
Data receiver unit, for receiving user data;
Encapsulation unit, the user data encapsulated tags that is used to described data receiver unit to receive obtains service message and configures forwarding channel; Described forwarding channel has indicated routing direction and on described routing direction two to go out link point;
Retransmission unit, forwards for the main channel to forwarding channel indication the service message that described encapsulation unit obtains; If Section Point detects main channel, direction breaks down, and according to APS agreement, carries out and switches, and to alternate channel, forwards described service message.
13. according to node described in claim 12, it is characterized in that,
Described retransmission unit, also for forwarding described service message process to alternate channel, recovers normal if main channel detected, to main channel, forwards described service message.
14. 1 kinds of network nodes, described network node is the node outside looped network, it is characterized in that, comprising:
Port determining unit, for determining that whether normal master port communicate by letter with standby port, described master port is that first on the forwarding channel of described network node and the service message main channel of indicating goes out to encircle the port of node communication; Described standby port is second port that goes out to encircle node communication on the main channel of forwarding channel indication of described network node and service message;
Receiving data units, if normal for master port communication, receives the user data that goes out link point from looped network from master port; If master port communication failure, and standby port is normal, from standby port, receives the user data that goes out link point from looped network.
15. according to network node described in claim 14, it is characterized in that, described receiving data units, comprising:
Port controlling unit and the first receiving element, or, the second receiving element and data selection unit;
Described port controlling unit, if normal for master port communication, open master port and closes standby port; If master port communication failure, and standby port is normal, closes master port and opens standby port;
Described the first receiving element, receives the user data from master port for the master port from opening; Or, from the standby port of opening, receive the user data from standby port;
Described the second receiving element, for receiving the user data from master port, and receives the user data from standby port;
Described data selection unit, if for master port communication failure, and standby port is normal, the user data from master port described the second receiving element being received is deleted; If master port communication is normal, the user data from standby port described the second receiving element being received is deleted.
16. according to network node described in claim 14, it is characterized in that,
Described receiving data units, also for receiving the user data process that goes out link point from looped network from standby port, if it is normal master port communication recovery to be detected, continue to receive the user data that goes out link point from looped network from standby port, or, be switched to from master port and receive the user data that goes out link point from looped network.
The system of the protection of 17. 1 kinds of looped network access service, comprising: the looped network that comprises at least three nodes, comprises one and enter link point, two and go out link point in looped network; Network node, described network node is the node outside looped network, it is characterized in that, described in enter link point for claim 12 or 14 node, describedly go out link point for the node of claim 9 or 10, described network node is the network node of claim 14 to 16 any one.
18. according to system described in claim 17, it is characterized in that,
Described network node has two; Describedly go out the node that link point is claim 11.
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