CN104702498B - A kind of method and device reducing equipment room light connects quantity by harmonious protection - Google Patents
A kind of method and device reducing equipment room light connects quantity by harmonious protection Download PDFInfo
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Abstract
The invention discloses it is a kind of by harmonious protection reduce equipment room light connects quantity method, the method includes：PTN core layer equipments detect the failure between far-end PE node/LTE core network equipment；It, will be with the relevant IP network sector address notice LTE core network equipment/far-end PE node of failure when detecting that the link between the PTN core layer equipments and far-end PE node/LTE core network equipment breaks down；After LTE core network equipment/far-end PE node receives the failure IP network section, start IP FRR/VPN FRR protections by the route handoff of the failure IP network section to alternate routing.The present invention also discloses a kind of devices reducing equipment room light connects quantity by harmonious protection to enable to LTE business that need not detour between the PTN core layer equipments of both ends using the present invention, to save PTN core layer equipment light connects quantity.
Description
Technical field
The present invention relates to the network coordination protection techniques of the communications field, more particularly to one kind reducing equipment by harmonious protection
Between light connects quantity method and device.
Background technology
Existing Packet Transport Network（PTN, Packet Transport Network）Framework is generally by backbone ring, convergence ring
With access ring or access chain composition, 3GPP Long Term Evolutions are being carried using PTN（LTE, Long Term Evolution）Industry
When business, a kind of group of common net topology of PTN network is the group network topological structure of double first line of a couplet forms, as shown in Figure 1.It is shown in Fig. 1
Double first line of a couplet group net topologies in, it will usually configure Layer3 Virtual Private Network in core layer PTN device and backbone convergence device
（L3VPN, Layer3Virtual Private Network）, two layer virtual private networks are configured on cut-in convergent layer（L2VPN,
Layer2Virtual Private Network）, the carrying and scheduling of LTE business are carried out by the way of L2VPN+L3VPN.
In existing protection technique, in PTN core layer equipments（Such as the PE1 and PE2 in Fig. 1）With LTE core network equipment
Such as signaling gateway（SGW, Signaling Gateway）/ mobile management entity（MME, Mobility Management
Entity）Between the quick heavy-route of configuration of IP（IP FRR, IP Fast ReRoute）Protection, and detected using two-way converting
（BFD, Bidirectional Forwarding Detection）Mechanism quickly detects link or node failure.In PTN cores
In central layer L3VPN networks, then label allocation switching path（LSP, Label Switching Path）Linear protection is interior to protect
Portion's link failure configures quick heavy-route（VPN FRR, Fast ReRoute）It protects to protect PE node failures, while PE is saved
Also BFD mechanism is used to detect peer failure between point, to accelerate the speed that VPN FRR are switched.Under this protection architecture, PTN
Must have light connects between core layer equipment, so as to L3VPN internal optical fiber links break down or PTN core equipments with
When link breaks down between LTE core network equipment, business can detour via PE2 to PE1.
In order to which the bandwidth ensured between PE1 and PE2 disclosure satisfy that the protection demand of all business, corresponding each group of backbone are converged
Poly- equipment needs at least a pair of of optical fiber and is attached, in practical applications, in order to ensure being smoothed out for business, PE1 with
It must be attached using multipair optical fiber between PE2, when network size is larger, this group network topological structure will consume very more
Fiber resource and equipment interface resource.
Invention content
In view of this, an embodiment of the present invention is intended to provide a kind of sides reducing equipment room light connects quantity by harmonious protection
Method and device can reduce the optical interface and amount of light demand to PTN core layer equipments by harmonious protection mechanism.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
An embodiment of the present invention provides a kind of method reducing equipment room light connects quantity by harmonious protection, the methods
Including：
PTN core layer equipments detect the failure between far-end PE node；
It, will be with failure phase when detecting that the link between the PTN core layer equipments and far-end PE node breaks down
The IP network sector address of pass notifies LTE core network equipment；
After LTE core network equipment receives the failure IP network section, start IP FRR protections by the failure IP network section
Route handoff is to alternate routing.
It is described to be with the relevant IP network sector address notice LTE core network equipment of failure in said program：
By relevant failure IP network sector address, pass through the BFD agreements between PTN core layer equipments and LTE core network equipment
Extended field notifies LTE core network equipment；
Wherein, the BFD protocol extensions field is：Increase for describing the IP network to break down in original BFD agreements
The Optional Field of section；It is described to notify that LTE core network equipment is：BFD protocol massages after variation are sent to LTE core network to set
It is standby；
Corresponding, the LTE core network equipment receives the failure IP network section and is：LTE core network equipment is from receiving
BFD messages in parsing be out of order IP network section address.
In said program, the method further includes：
Whether the failure that PTN core layer equipments detect between far-end PE node disappears；
When detecting that the link failure between the PTN core layer equipments and far-end PE node disappears, by the IP network
Sector address is deleted from the BFD protocol extensions field, and the BFD protocol massages after variation are sent to LTE core network equipment；
Corresponding, when the LTE core network equipment does not receive failure IP network sector address, starting IP FRR protections will routing
Switchback.
The embodiment of the present invention additionally provides a kind of method reducing equipment room light connects quantity by harmonious protection, the side
Method includes：
PTN core layer equipments detect the failure between LTE core network equipment；
It, will be related to failure when detecting that the link of the PTN core layer equipments and LTE core network equipment breaks down
IP network sector address notify far-end PE node；
After far-end PE node receives the failure IP network section, start VPN FRR protections by the road of the failure IP network section
By being switched to alternate routing.
It is described to be with the relevant IP network sector address notice far-end PE node of failure in said program：
By relevant failure IP network sector address, pass through the BFD protocol extensions between PTN core layer equipments and far-end PE node
Field notifies far-end PE node；
Wherein, the BFD protocol extensions field is：Increase for describing the IP network to break down in original BFD agreements
The Optional Field of section；It is described to notify that far-end PE node is：BFD protocol massages after variation are sent to far-end PE node；
Corresponding, the far-end PE node receives the failure IP network section and is：Far-end PE node is reported from the BFD received
IP network section address of being out of order is parsed in text.
In said program, the method further includes：
Whether the failure that PTN core layer equipments detect between LTE core network equipment disappears；
When detecting that the link failure of the PTN core layer equipments and LTE core network equipment disappears, by the IP network section
Address is deleted from the BFD protocol extensions field, and the BFD protocol massages after variation are sent to far-end PE node；
Corresponding, when the far-end PE node does not receive failure IP network sector address, starting VPN FRR protections will be routed back to
It cuts.
The embodiment of the present invention additionally provides a kind of device reducing equipment room light connects quantity by harmonious protection, the dress
Set including：Detection unit, notification unit, switch unit, wherein the detection unit, notification unit are located at PTN core layers and set
Standby, the switch unit is located at LTE core network equipment；
The detection unit, for detecting the failure between far-end PE node；
The notification unit detects that the link between the PTN core layer equipments and far-end PE node occurs for working as
When failure, LTE core network equipment will be notified with the relevant IP network sector address of failure；
The switch unit, for after receiving the failure IP network section, starting IP FRR protections by the failure IP
The route handoff of the network segment is to alternate routing.
In said program, the detection unit is additionally operable to detect between the PTN core layer equipments and far-end PE node
Whether link failure disappears；
The notification unit is additionally operable to work as the link event detected between the PTN core layer equipments and far-end PE node
When barrier disappears, the IP network sector address is deleted from the BFD protocol extensions field, and by the BFD protocol massages after variation
It is sent to LTE core network equipment；
The switch unit is additionally operable to when not receiving failure IP network sector address, and starting IP FRR protections will be routed back to
It cuts.
The embodiment of the present invention additionally provides a kind of device reducing equipment room light connects quantity by harmonious protection, the dress
Set including：Detection unit, notification unit, switch unit, wherein the detection unit, notification unit are located at PTN core layers and set
Standby, the switch unit is located at far-end PE node；
The detection unit, for detecting the failure between LTE core network equipment；
The notification unit, for when the link appearance event for detecting the PTN core layer equipments and LTE core network equipment
When barrier, far-end PE node will be notified with the relevant IP network sector address of failure；
The switch unit, for after receiving the failure IP network section, starting VPN FRR protections by the failure IP
The route handoff of the network segment is to alternate routing.
In said program, the detection unit is additionally operable to detect the chain of the PTN core layer equipments and LTE core network equipment
Whether road failure disappears；
The notification unit is additionally operable to when the link failure for detecting the PTN core layer equipments and LTE core network equipment
When disappearance, the IP network sector address is deleted from the BFD protocol extensions field, and the BFD protocol massages after variation are sent out
Toward far-end PE node；
The switch unit is additionally operable to when not receiving failure IP network sector address, and starting VPN FRR protections will be routed back to
It cuts.
The method and device that equipment room light connects quantity is reduced by harmonious protection that the embodiment of the present invention is provided, according to
BFD associations inside BFD agreements and PTN network between PTN core layer equipments and LTE core network equipment between the PE of L3VPN
View, detect failure between PTN core layer equipments and far-end PE node and PTN core layer equipments and LTE core network equipment it
Between failure, and pass through failure notification mechanism so that PTN core layer equipments and far-end PE node in the L3VPN inside PTN network
Between the failure that occurs of some IP network section routing can be for delivery to LTE core network equipment, while PTN core layer equipments and LTE cores
Failure between heart net equipment can also notify the L3VPN far-end PE nodes inside PTN, with start LTE core network equipment with
The routing switch harmonious protection of far-end PE node so that LTE business need not detour between the PTN core layer equipments of both ends, from
And save PTN core layer equipment light connects quantity.
Description of the drawings
Fig. 1 is a kind of networking topological diagram of double first line of a couplet forms of existing PTN network；
The networking topological diagram that Fig. 2 breaks down between one PTN core layer equipments of the embodiment of the present invention and far-end PE node；
Fig. 3 is the method flow schematic diagram that the embodiment of the present invention one reduces equipment room light connects quantity by harmonious protection；
Fig. 4 is the method flow schematic diagram that the embodiment of the present invention two reduces equipment room light connects quantity by harmonious protection；
The group net topology that Fig. 5 breaks down between three PTN core layer equipments of the embodiment of the present invention and LTE core network equipment
Figure；
Fig. 6 is the method flow schematic diagram that the embodiment of the present invention three reduces equipment room light connects quantity by harmonious protection；
Fig. 7 is the method flow schematic diagram that the embodiment of the present invention four reduces equipment room light connects quantity by harmonious protection；
Fig. 8 is that the composed structure for the device that the embodiment of the present invention reduces equipment room light connects quantity by harmonious protection is illustrated
Figure；
Fig. 9 is the composed structure for the device that another embodiment of the present invention reduces equipment room light connects quantity by harmonious protection
Schematic diagram.
Specific implementation mode
In embodiments of the present invention, the failure between the detection of PTN core layer equipments and far-end PE node；It is described when detecting
When link between PTN core layer equipments and far-end PE node breaks down, LTE will be notified with the relevant IP network sector address of failure
Equipment of the core network；LTE core network equipment starts IP FRR protections by the failure IP network after receiving the failure IP network section
The route handoff of section is to alternate routing；Alternatively, the failure between the detection of PTN core layer equipments and LTE core network equipment；Work as detection
When breaking down to the link of the PTN core layer equipments and LTE core network equipment, it will lead to the relevant IP network sector address of failure
Know far-end PE node；Far-end PE node starts VPN FRR protections by the failure IP network after receiving the failure IP network section
The route handoff of section is to alternate routing.
Here, described to be with the relevant IP network sector address notice LTE core network equipment/far-end PE node of failure：By phase
The failure IP network sector address of pass is expanded by the BFD agreements between PTN core layer equipments and LTE core network equipment/far-end PE node
Field is opened up, notifies LTE core network equipment/far-end PE node, wherein the BFD protocol extensions field is：In original BFD
Increase the Optional Field of the IP network section for describing to break down in agreement；It is described to notify LTE core network equipment/far-end PE section
It puts and is：BFD protocol massages after variation are sent to LTE core network equipment/far-end PE node.Corresponding, the LTE core network is set
Standby/far-end PE node receives the failure IP network section：LTE core network equipment/far-end PE node is from the BFD messages received
It is middle to parse IP network section address of being out of order.
The extended method of BFD agreements increases several Optional Fields, for retouching after original agreement PDU as shown in table 1
State the IP network section to break down.In table 1 last column content be the Optional Field that newly increases wherein：
Disabled IP addr Type：Indicate that follow-up field is failure IP network section address contents, the value of the Type is not
It can be repeated with existing Auth Type values；
IP addr num：Indicate the number of the IP address network segment in subsequent packet；
IP addr data：It indicates specific failure IP network segment value, may include multiple IP network segment values here.
Table 1
Start IP FRR protection by after the route handoff to alternate routing of the failure IP network section, the PTN core layers
Equipment continues the failure between detection and far-end PE node, when detecting between the PTN core layer equipments and far-end PE node
Link failure when disappearing, the IP network sector address is deleted from the BFD protocol extensions field, and by the BFD after variation
Protocol massages are sent to LTE core network equipment；It is corresponding, when the LTE core network equipment does not receive failure IP network sector address, open
Dynamic IP FRR protections will route switchback.
It is corresponding, start VPN FRR protection by after the route handoff to alternate routing of the failure IP network section, it is described
PTN core layer equipments continue the failure between detection and LTE core network equipment, when detecting the PTN core layer equipments and LTE
When the link failure of equipment of the core network disappears, the IP network sector address is deleted from the BFD protocol extensions field, and will become
BFD protocol massages after change are sent to far-end PE node；Corresponding, the far-end PE node does not receive failure IP network sector address
When, switchback will be route by starting VPN FRR protections.
The LTE core network equipment can be but be not limited to sGW/MME.
Below in conjunction with the accompanying drawings and specific embodiment, the implementation of technical solution of embodiment of the present invention work is further retouched in detail
It states.The networking topological diagram that Fig. 2 breaks down between one PTN core layer equipments of the embodiment of the present invention and far-end PE node, this reality
It applies in example, for LTE core network equipment by taking sGW as an example, PTN core layer equipments are the PE1 and PE2 in figure, and far-end PE node is PE3-
PE8.When failure described in Fig. 2 occurs, since there are optical fiber connections, sGW to be sent to PE1 in the prior art, between PE1 and PE2
Downlink business can be connected by the optical fiber between PE1 and PE2, be sent to PE2, far-end PE node be forwarded to via PE2, such as
When the downlink business is the business for being sent to eNB-1, service path in the prior art is sGW-PE1-PE2-PE4-eNB-
1.The embodiment of the present invention passes through a kind of failure notification mechanism so that LTE core network equipment can perceive PTN core layer equipments with it is remote
The failure between PE nodes is held, to realize routing switch in LTE core network equipment, such as when the downlink business is to be sent to
When the business of eNB-1, the service path in the embodiment of the present invention is sGW-PE2-PE4-eNB-1 in this way, downlink business can not
Again by the light connects between PE1 and PE2, to reduce equipment room light connects quantity.
Fig. 3 is the method flow schematic diagram that the embodiment of the present invention one reduces equipment room light connects quantity by harmonious protection,
As shown in figure 3, the embodiment of the present invention one is included the following steps by the method that harmonious protection reduces equipment room light connects quantity：
Step 301：PTN core layer equipments detect the failure between far-end PE node；
BFD or multiprotocol label switching-transport architecture may be used in failure between the detection and far-end PE node
（MPLS-TP, Multi-Protocol Label Switching）Operation management maintainance（OAM, Operation
Administration and Maintenance）The methods of realize.
Step 302：It, will when detecting that the link between the PTN core layer equipments and far-end PE node breaks down
LTE core network equipment is notified with the relevant IP network sector address of failure；
It is described to be with the relevant IP network sector address notice LTE core network equipment of failure：By relevant failure IP network section
Location notifies LTE core network equipment by the BFD protocol extension fields between PTN core layer equipments and LTE core network equipment,
Wherein, the BFD protocol extensions field is：Increase the optional of the IP network section for describing to break down in original BFD agreements
Field；It is described to notify that LTE core network equipment is：BFD protocol massages after variation are sent to LTE core network equipment.
The extended method of BFD agreements increases several Optional Fields, for retouching after original agreement PDU as shown in table 1
State the IP network section to break down.
Step 303：After LTE core network equipment receives the failure IP network section, start IP FRR protections by the failure
The route handoff of IP network section is to alternate routing；
Specifically, LTE core network equipment parses IP network section address of being out of order from the BFD messages received, start IP
FRR is protected the route handoff of the failure IP network section to alternate routing.
Further, the invention also includes：Whether the failure that PTN core layer equipments detect between far-end PE node disappears.
When detecting that link failure between the PTN core layer equipments and far-end PE node disappears, by the IP network sector address from
It is deleted in the BFD protocol extensions field, and the BFD protocol massages after variation is sent to LTE core network equipment；It is corresponding, institute
When stating LTE core network equipment and not receiving failure IP network sector address, switchback will be route by starting IP FRR protections.
Fig. 4 is the method flow schematic diagram that the embodiment of the present invention two reduces equipment room light connects quantity by harmonious protection；
As shown in figure 4, the embodiment of the present invention two is included the following steps by the method that harmonious protection reduces equipment room light connects quantity：
Step 401：PTN core layer equipments judge whether the failure between far-end PE node changes；When failure is produced
When raw, step 402 is executed；When failure vanishes, step 404 is executed；
The failure is produced as：Failure is not present between former PTN core layer equipments and far-end PE node, occurs event after testing
Barrier；The failure vanishes are：There are failure between former PTN core layer equipments and far-end PE node, failure vanishes after testing.
Step 402：It, will when detecting that the link between the PTN core layer equipments and far-end PE node breaks down
Long term evolution LTE core network equipment is notified with the relevant IP network sector address of failure；
It is described to be with the relevant IP network sector address notice LTE core network equipment of failure：By relevant failure IP network section
Location notifies LTE core network equipment by the BFD protocol extension fields between PTN core layer equipments and LTE core network equipment,
Wherein, the BFD protocol extensions field is：Increase the optional of the IP network section for describing to break down in original BFD agreements
Field；It is described to notify that LTE core network equipment is：BFD protocol massages after variation are sent to LTE core network equipment.
The extended method of BFD agreements increases several Optional Fields, for retouching after original agreement PDU as shown in table 1
State the IP network section to break down.
Step 403：After LTE core network equipment receives the failure IP network section, start IP FRR protections by the failure
The route handoff of IP network section is to alternate routing；This flow terminates.
Specifically, LTE core network equipment parses IP network section address of being out of order from the BFD messages received, start IP
FRR is protected the route handoff of the failure IP network section to alternate routing.
Step 404：When detecting the failure vanishes in the link between the PTN core layer equipments and far-end PE node
When, the failure vanishes relevant information is notified into long term evolution LTE core network equipment；
It is described to be by failure vanishes relevant information notice long term evolution LTE core network equipment：By the IP network section
Location is deleted from the BFD protocol extensions field, and the BFD protocol massages after variation are sent to LTE core network equipment.
Step 405：When the LTE core network equipment does not receive failure IP network sector address, start IP FRR protections by road
By switchback.
Specifically, LTE core network equipment does not parse IP network section address of being out of order from the BFD messages received, start IP
FRR is protected the routing switchback of the IP network section of the failure vanishes.
Fig. 5 is the networking topological diagram of three PTN core layer equipments of the embodiment of the present invention and the failure of LTE core network equipment room,
In the present embodiment, for LTE core network equipment by taking sGW as an example, PTN core layer equipments are the PE1 and PE2 in figure, and far-end PE node is
PE3-PE8.When failure described in Fig. 5 occurs, since in the prior art, there are optical fiber connections between PE1 and PE2, when PE3 will be upper
After industry business is sent to PE1, PE1 can be connected by the optical fiber between PE1 and PE2, be forwarded to PE2, LTE is forwarded to via PE2
Equipment of the core network, such as when the uplink service is the business that eNB-1 is initiated, service path in the prior art is eNB-1-
PE3-PE1-PE2-sGW.The embodiment of the present invention passes through a kind of failure notification mechanism so that far-end PE node can perceive PTN cores
Failure between central layer equipment and LTE core network equipment, to realize routing switch in far-end PE node, such as on described
When industry business is the business that eNB-1 is initiated, the service path in the embodiment of the present invention is eNB-1-PE4-PE2-sGW.On in this way,
Industry business can be no longer by the light connects between PE1 and PE2, to reduce equipment room light connects quantity.
Fig. 6 is the method flow schematic diagram that the embodiment of the present invention three reduces equipment room light connects quantity by harmonious protection,
As shown in fig. 6, the embodiment of the present invention three is included the following steps by the method that harmonious protection reduces equipment room light connects quantity：
Step 601：PTN core layer equipments detect the failure between LTE core network equipment；
Failure between the detection and far-end PE node may be used the methods of BFD or physical interface detection and realize.
Step 602：When detecting that the link between the PTN core layer equipments and LTE core network equipment breaks down,
Far-end PE node will be notified with the relevant IP network sector address of failure；
It is described to be with the relevant IP network sector address notice far-end PE node of failure：By relevant failure IP network sector address,
By the BFD protocol extension fields between PTN core layer equipments and far-end PE node, far-end PE node device is notified, wherein
The BFD protocol extensions field is：Increase the Optional Field of the IP network section for describing to break down in original BFD agreements；
It is described to notify that far-end PE node is：BFD protocol massages after variation are sent to far-end PE node.
The extended method of BFD agreements increases several Optional Fields, for retouching after original agreement PDU as shown in table 1
State the IP network section to break down.
Step 603：After far-end PE node receives the failure IP network section, start VPN FRR protections by the failure IP
The route handoff of the network segment is to alternate routing；
Specifically, far-end PE node parses IP network section address of being out of order from the BFD messages received, start VPN FRR
It protects the route handoff of the failure IP network section to alternate routing.
Further, the invention also includes：Whether the failure that PTN core layer equipments detect between LTE core network equipment disappears
It loses.When detecting that the link failure between the PTN core layer equipments and LTE core network equipment disappears, by the IP network section
Address is deleted from the BFD protocol extensions field, and the BFD protocol massages after variation are sent to far-end PE node；It is corresponding,
When the far-end PE node does not receive failure IP network sector address, switchback will be route by starting IP FRR protections.
Fig. 7 is the method flow schematic diagram that the embodiment of the present invention four reduces equipment room light connects quantity by harmonious protection；
As shown in fig. 7, the embodiment of the present invention four is included the following steps by the method that harmonious protection reduces equipment room light connects quantity：
Step 701：PTN core layer equipments judge whether the failure between LTE core network equipment changes；Work as failure
When generation, step 702 is executed；When failure vanishes, step 704 is executed；
The failure is produced as：Failure is not present between former PTN core layer equipments and LTE core network equipment, goes out after testing
Existing failure；The failure vanishes are：There are failure between former PTN core layer equipments and LTE core network equipment, failure disappears after testing
It loses.
Step 702：When detecting that the link between the PTN core layer equipments and LTE core network equipment breaks down,
Far-end PE node will be notified with the relevant IP network sector address of failure；
It is described to be with the relevant IP network sector address notice far-end PE node of failure：By relevant failure IP network sector address,
By the BFD protocol extension fields between PTN core layer equipments and far-end PE node, far-end PE node is notified, specially：
Increase in original BFD agreements for describing the Optional Field of IP network section to break down, and by the BFD protocol massages after variation
It is sent to far-end PE node.
The extended method of BFD agreements increases several Optional Fields, for retouching after original agreement PDU as shown in table 1
State the IP network section to break down.
Step 703：After far-end PE node receives the failure IP network section, start VPN FRR protections, by the failure IP
The route handoff of the network segment is to alternate routing；This flow terminates.
Specifically, far-end PE node parses IP network section address of being out of order from the BFD messages received, start VPN FRR
It protects the route handoff of the failure IP network section to alternate routing.
Step 704：When detecting that the failure in the link between the PTN core layer equipments and LTE core network equipment disappears
When mistake, the failure vanishes relevant information is notified into far-end PE node；
It is described to be by failure vanishes relevant information notice far-end PE node：By the IP network sector address from the BFD
It is deleted in protocol extension field, and the BFD protocol massages after variation is sent to far-end PE node.
Step 705：When the far-end PE node does not receive failure IP network sector address, starting VPN FRR protections will routing
Switchback.
Specifically, far-end PE node does not parse IP network section address of being out of order from the BFD messages received, start VPN
FRR is protected the routing switchback of the IP network section of the failure vanishes.
The embodiment of the present invention additionally provides a kind of device reducing equipment room light connects quantity by harmonious protection, such as Fig. 8
Shown, described device includes：Detection unit 81, notification unit 82, switch unit 83, wherein the detection unit 81, notification sheet
Member 82 is located at PTN core layer equipments, and the switch unit 83 is located at LTE core network equipment,
The detection unit 81, for detecting the failure between far-end PE node；
The detection unit 81 detects the failure between far-end PE node and the side such as BFD or MPLS-TP OAM may be used
Method is realized.
The notification unit 82 detects that the link between the PTN core layer equipments and far-end PE node goes out for working as
When existing failure, LTE core network equipment will be notified with the relevant IP network sector address of failure；
The notification unit 82 will notify that LTE core network equipment be with the relevant IP network sector address of failure：It will relevant event
Barrier IP network sector address notifies LTE by the BFD protocol extension fields between PTN core layer equipments and LTE core network equipment
Equipment of the core network, wherein the BFD protocol extensions field is：Increase for describing the IP to break down in original BFD agreements
The Optional Field of the network segment；It is described to notify that LTE core network equipment is：BFD protocol massages after variation are sent to LTE core network to set
It is standby.
The extended method of BFD agreements increases several Optional Fields, for retouching after original agreement PDU as shown in table 1
State the IP network section to break down.
The switch unit 83, for after receiving the failure IP network section, starting IP FRR protections by the failure
The route handoff of IP network section is to alternate routing.
Specifically, the switch unit 83 parses IP network section address of being out of order from the BFD messages received, start IP
FRR is protected the route handoff of the failure IP network section to alternate routing.
Further, when described device is for switchback process after the failure vanishes, the detection unit 81 is also used
Whether disappear in the link failure detected between the PTN core layer equipments and far-end PE node；
The notification unit 82 is additionally operable to work as the link detected between the PTN core layer equipments and far-end PE node
When failure vanishes, the IP network sector address is deleted from the BFD protocol extensions field, and by the BFD agreement reports after variation
Text is sent to LTE core network equipment；
The switch unit 83 is additionally operable to when not receiving failure IP network sector address, and starting IP FRR protections will routing
Switchback.
Specifically, the switch unit 83 does not parse IP network section address of being out of order from the BFD messages received, start IP
FRR is protected the routing switchback of the IP network section of the failure vanishes.
The embodiment of the present invention additionally provides a kind of device reducing equipment room light connects quantity by harmonious protection, such as Fig. 9
Shown, described device includes：Detection unit 91, notification unit 92, switch unit 93, wherein the detection unit 91, notification sheet
Member 92 is located at PTN core layer equipments, and the switch unit 93 is located at far-end PE node,
The detection unit 91, for detecting the failure between LTE core network equipment；
Failure between the detection and far-end PE node may be used the methods of BFD or physical interface detection and realize.
The notification unit 92, for when the link appearance for detecting the PTN core layer equipments and LTE core network equipment
When failure, far-end PE node will be notified with the relevant IP network sector address of failure；
It is described to be with the relevant IP network sector address notice far-end PE node of failure：By relevant failure IP network sector address,
By the BFD protocol extension fields between PTN core layer equipments and far-end PE node, far-end PE node device is notified, wherein
The BFD protocol extensions field is：Increase the Optional Field of the IP network section for describing to break down in original BFD agreements；
It is described to notify that far-end PE node is：BFD protocol massages after variation are sent to far-end PE node.
The extended method of BFD agreements increases several Optional Fields, for retouching after original agreement PDU as shown in table 1
State the IP network section to break down.
The switch unit 93, for after receiving the failure IP network section, starting VPN FRR protections by the failure
The route handoff of IP network section is to alternate routing；
Specifically, the switch unit 93 parses IP network section address of being out of order from the BFD messages received, start VPN
FRR is protected the route handoff of the failure IP network section to alternate routing.
Further, when described device is for switchback process after the failure vanishes, the detection unit 91 is also used
Whether disappear in the link failure for detecting the PTN core layer equipments and LTE core network equipment；
The notification unit 92 is additionally operable to when the link event for detecting the PTN core layer equipments with LTE core network equipment
When barrier disappears, the IP network sector address is deleted from the BFD protocol extensions field, and by the BFD protocol massages after variation
It is sent to far-end PE node；
The switch unit 93 is additionally operable to when not receiving failure IP network sector address, and starting VPN FRR protections will routing
Switchback.
Specifically, the switch unit 93 parses IP network section address of being out of order from the BFD messages received, start VPN
FRR is protected the route handoff of the failure IP network section to alternate routing.
It is reduced by harmonious protection shown in Fig. 8 and Fig. 9 everywhere in the device of equipment room light connects quantity and manages unit
Realization function, can refer to mentioned by harmonious protection reduce equipment room light connects quantity method associated description and understand.
It will be appreciated by those skilled in the art that in Fig. 8 and the device shown in Fig. 9 for reducing equipment room light connects quantity by harmonious protection
The function of each processing unit can realize by running on the program on processor, also can by specific logic circuit reality
It is existing, such as：It can be by the central processing unit positioned at bridging nodes（CPU）, microprocessor（MPU）, digital signal processor（DSP）、
Or field programmable gate array（FPGA）It realizes；The storage unit can also be realized by various memories or storage medium.
In several embodiments provided by the present invention, it should be understood that disclosed method and apparatus can pass through it
His mode is realized.The apparatus embodiments described above are merely exemplary, for example, the division of the unit, only
A kind of division of logic function, formula that in actual implementation, there may be another division manner, such as：Multiple units or component can combine, or
It is desirably integrated into another system, or some features can be ignored or not executed.In addition, shown or discussed each composition portion
It can be by some interfaces, the INDIRECT COUPLING or communication connection of equipment or module, Ke Yishi to divide mutual communication connection
It is electrical, mechanical or other forms.
The above-mentioned unit illustrated as separating component can be or may not be and be physically separated, aobvious as unit
The component shown can be or may not be physical module, you can be located at a place, may be distributed over multiple network moulds
On block；Some or all of wherein unit can be selected according to the actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in various embodiments of the present invention can be fully integrated into a processing unit, also may be used
It, can also be during two or more units be integrated in one unit to be each unit individually as a unit；It is above-mentioned
The form that hardware had both may be used in integrated unit is realized, can also be realized in the form of hardware adds SFU software functional unit.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in computer read/write memory medium, which exists
When execution, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes：Movable storage device read-only is deposited
Reservoir（ROM, Read-Only Memory）, the various media that can store program code such as magnetic disc or CD.
If alternatively, the above-mentioned integrated unit of the embodiment of the present invention is realized in the form of software function module and as independence
Product sale or in use, can also be stored in a computer read/write memory medium.Based on this understanding, this hair
Substantially the part that contributes to existing technology can body in the form of software products in other words for the technical solution of bright embodiment
Reveal and, which is stored in a storage medium, including some instructions are with so that a computer is set
It is standby（Can be personal computer, server or network equipment etc.）Execute the whole of each embodiment the method for the present invention
Or part.And storage medium above-mentioned includes：Movable storage device, ROM, magnetic disc or CD etc. are various can to store program generation
The medium of code.
The present invention be described in example by harmonious protection reduce equipment room light connects quantity method and apparatus only with
For VPN, but it is not limited only to this, as long as being related to the method and apparatus for reducing equipment room light connects quantity by harmonious protection
In protection scope of the present invention.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (6)
1. a kind of method reducing equipment room light connects quantity by harmonious protection, which is characterized in that the method includes：
Packet Transport Network PTN core layer equipments detect the failure between remote edge router PE node；
It, will be relevant with failure when detecting that the link between the PTN core layer equipments and far-end PE node breaks down
IP network sector address notifies long term evolution LTE core network equipment；
After LTE core network equipment receives the failure IP network section, start the quick heavy-route IP FRR protections of IP by the failure
The route handoff of IP network section is to alternate routing；
The method further includes：
Whether the failure that PTN core layer equipments detect between far-end PE node disappears；
When detecting that the link failure between the PTN core layer equipments and far-end PE node disappears, by the IP network section
Location is deleted from BFD protocol extension fields, and the BFD protocol massages after variation are sent to LTE core network equipment；Wherein, described
BFD protocol extension fields are：Increase the Optional Field of the IP network section for describing to break down in original BFD agreements；
Corresponding, when the LTE core network equipment does not receive failure IP network sector address, starting IP FRR protections will be routed back to
It cuts.
2. method according to claim 1, which is characterized in that described to notify LTE cores with the relevant IP network sector address of failure
Heart net equipment is：
By relevant failure IP network sector address, detected by the two-way converting between PTN core layer equipments and LTE core network equipment
BFD protocol extension fields, notify LTE core network equipment；
Wherein, described to notify that LTE core network equipment is：BFD protocol massages after variation are sent to LTE core network equipment；
Corresponding, the LTE core network equipment receives the failure IP network section and is：LTE core network equipment is from the BFD received
IP network section address of being out of order is parsed in message.
3. a kind of method reducing equipment room light connects quantity by harmonious protection, which is characterized in that the method includes：
PTN core layer equipments detect the failure between LTE core network equipment；
It, will be with the relevant IP of failure when detecting that the link of the PTN core layer equipments and LTE core network equipment breaks down
Network segment address notifies far-end PE node；
After far-end PE node receives the failure IP network section, start quick heavy-route VPN FRR protections by the failure IP network
The route handoff of section is to alternate routing；
The method further includes：
Whether the failure that PTN core layer equipments detect between LTE core network equipment disappears；
When detecting that the link failure of the PTN core layer equipments and LTE core network equipment disappears, by the IP network sector address
It is deleted from BFD protocol extension fields, and the BFD protocol massages after variation is sent to far-end PE node；Wherein, the BFD associations
Discussing extended field is：Increase the Optional Field of the IP network section for describing to break down in original BFD agreements；
Corresponding, when the far-end PE node does not receive failure IP network sector address, switchback will be route by starting VPN FRR protections.
4. method according to claim 3, which is characterized in that described to notify far-end PE with the relevant IP network sector address of failure
Node is：
By relevant failure IP network sector address, pass through the BFD protocol extension words between PTN core layer equipments and far-end PE node
Section, notifies far-end PE node；
Wherein, described to notify that far-end PE node is：BFD protocol massages after variation are sent to far-end PE node；
Corresponding, the far-end PE node receives the failure IP network section and is：Far-end PE node is from the BFD messages received
Parse IP network section address of being out of order.
5. a kind of device reducing equipment room light connects quantity by harmonious protection, which is characterized in that described device includes：Detection
Unit, notification unit, switch unit, wherein the detection unit, notification unit are located at PTN core layer equipments, and the switching is single
Member is located at LTE core network equipment；
The detection unit, for detecting the failure between far-end PE node；
The notification unit detects that the link between the PTN core layer equipments and far-end PE node breaks down for working as
When, it will notify LTE core network equipment with the relevant IP network sector address of failure；
The switch unit, for after receiving the failure IP network section, starting IP FRR protections by the failure IP network section
Route handoff to alternate routing；
Whether the detection unit, the link failure for being additionally operable to detect between the PTN core layer equipments and far-end PE node disappear
It loses；
The notification unit is additionally operable to detect that the link failure between the PTN core layer equipments and far-end PE node disappears
When mistake, the IP network sector address is deleted from BFD protocol extension fields, and the BFD protocol massages after variation are sent to LTE cores
Heart net equipment；Wherein, the BFD protocol extensions field is：Increase for describing the IP network to break down in original BFD agreements
The Optional Field of section；
The switch unit is additionally operable to when not receiving failure IP network sector address, and switchback will be route by starting IP FRR protections.
6. a kind of device reducing equipment room light connects quantity by harmonious protection, which is characterized in that described device includes：Detection
Unit, notification unit, switch unit, wherein the detection unit, notification unit are located at PTN core layer equipments, and the switching is single
Member is located at far-end PE node；
The detection unit, for detecting the failure between LTE core network equipment；
The notification unit, for when the link failure for detecting the PTN core layer equipments and LTE core network equipment
When, it will notify far-end PE node with the relevant IP network sector address of failure；
The switch unit, for after receiving the failure IP network section, starting VPN FRR protections by the failure IP network section
Route handoff to alternate routing；
Whether the link failure that the detection unit is additionally operable to detect the PTN core layer equipments and LTE core network equipment disappears；
The notification unit is additionally operable to when the link failure disappearance for detecting the PTN core layer equipments with LTE core network equipment
When, the IP network sector address is deleted from BFD protocol extension fields, and the BFD protocol massages after variation are sent to far-end PE
Node；Wherein, the BFD protocol extensions field is：Increase the IP network section for describing to break down in original BFD agreements
Optional Field；
The switch unit is additionally operable to when not receiving failure IP network sector address, and switchback will be route by starting VPN FRR protections.
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| CN201310645905.XA CN104702498B (en) | 2013-12-04 | 2013-12-04 | A kind of method and device reducing equipment room light connects quantity by harmonious protection |
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| CN105262661A (en) * | 2015-08-28 | 2016-01-20 | 吴伟 | Network system and method for solving ring formation of access layer of IPRAN packet transport network through wireless mode |
| CN108668308B (en) * | 2017-03-30 | 2021-11-02 | 中国移动通信集团内蒙古有限公司 | LTE PTN transmission network and static route protection method thereof |
| CN109688015A (en) * | 2019-01-16 | 2019-04-26 | 武汉市九晖通讯技术有限公司 | A kind of biplane network architecture |
| CN110224886B (en) * | 2019-05-31 | 2021-02-09 | 新华三技术有限公司 | Tunnel connectivity detection method and device and network edge equipment |
| CN113225251A (en) * | 2021-05-31 | 2021-08-06 | 上海寰创通信科技股份有限公司 | Method and system for rapidly switching LTE (Long term evolution) main router and LTE main router |
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| CN100389571C (en) * | 2005-03-25 | 2008-05-21 | 华为技术有限公司 | Method for detecting chain circuit fault between end-to-end notes in mixed network |
| CN101944951B (en) * | 2010-08-30 | 2016-01-20 | 中兴通讯股份有限公司 | The method of switching back links between networks and device |
| CN101931520B (en) * | 2010-09-02 | 2014-01-01 | 中兴通讯股份有限公司 | Switching method and system |
| US8750096B2 (en) * | 2011-01-13 | 2014-06-10 | Tellabs Operations, Inc. | Method and apparatus for improving data integrity during a router recovery process |
| CN102448095A (en) * | 2012-01-20 | 2012-05-09 | 杭州华三通信技术有限公司 | Dual homing protection method and equipment |
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