CN108574636A - A kind of tunnel authorization information processing method and path-calculating element - Google Patents
A kind of tunnel authorization information processing method and path-calculating element Download PDFInfo
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- CN108574636A CN108574636A CN201710147063.3A CN201710147063A CN108574636A CN 108574636 A CN108574636 A CN 108574636A CN 201710147063 A CN201710147063 A CN 201710147063A CN 108574636 A CN108574636 A CN 108574636A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/30—Routing of multiclass traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/82—Miscellaneous aspects
- H04L47/825—Involving tunnels, e.g. MPLS
Abstract
The invention discloses a kind of tunnel authorization information processing methods, including：Path-calculating element (PCE) receives the tunnel authorization request that at least one path calculating client (PCC) sends, to authorize established tunnel to the PCE；Judge whether preset tunnel authorization condition is met based on tunnel authorization request；When determining that the preset tunnel authorization condition is unmet, the first message for carrying the first key message is sent at least one PCC, so that at least one PCC knows the ability that the PCE receives the tunnel authorization request of itself；Wherein, first key message includes at least one following information：The mandate overloading information of the PCE, receivable mandate PCC identification informations, receivable mandate tunnel identification information.The present invention further simultaneously discloses a kind of PCE.
Description
Technical field
The present invention relates to data communication technology field more particularly to a kind of tunnel authorization information processing method and path computings
Unit (PCE, Path Compute Element).
Background technology
With the development of software defined network (SDN, Software Defined Network) technology, PCE is not only
As concentrate calculate road serviced component, can also active to path calculating client (PCC, Path Computation
Client the tunnel) having built up carries out Dynamic Programming and tuning work, i.e. the tunnel that PCC has been created can license to PCE,
Then PCE can update the routing information in tunnel as needed.However, since PCC can not know that PCE can currently receive itself
The case where tunnel authorization of transmission, result in PCE have rejected itself transmission tunnel authorization request after, can also repeat to this
PCE authorizes established tunnel, thereby reduces the working efficiency of PCC and PCE.
Therefore it provides a kind of tunnel authorization information processing scheme, can make PCC learn that PCE can receive the tunnel of itself and award
Weigh the ability of request, it has also become technical problem urgently to be resolved hurrily.
Invention content
A kind of tunnel authorization information processing method of offer of the embodiment of the present invention and PCE, solve at least and deposit in the prior art
The problem of, PCC can be made to know the case where PCE currently can receive the tunnel authorization of itself, improve the work effect of PCC and PCE
Rate.
What the technical solution of the embodiment of the present invention was realized in：
An embodiment of the present invention provides a kind of tunnel authorization information processing methods, are applied to PCE, the method includes：
Receive the tunnel authorization request that at least one PCC is sent；The tunnel authorization request is used at least one PCC
Authorize established tunnel to the PCE；
Judge whether preset tunnel authorization condition is met based on tunnel authorization request；
When determining that the preset tunnel authorization condition is unmet, the first message for carrying the first key message is sent
To at least one PCC, so that at least one PCC knows the ability that the PCE receives the tunnel authorization request of itself；
Wherein, first key message includes at least one following information：The mandate overloading information of the PCE can connect
Mandate PCC identification informations, the receivable mandate tunnel identification information of receipts.
It is described to judge whether preset tunnel authorization condition is expired based on tunnel authorization request in said program
Foot, including：
Obtain the currently received mandate tunnel numbers of the PCE；
Judge whether to reach the receivable mandate tunnels the PCE based on the currently received mandate tunnel numbers of the PCE
Quantity threshold；
When determining the receivable mandate tunnel quantity thresholds of the not up to PCE, it is considered as preset tunnel authorization condition and obtains
To satisfaction；Otherwise, it is unmet to be considered as preset tunnel authorization condition；
Correspondingly, when the determination preset tunnel authorization condition is unmet, sends and carry the first crucial letter
The first message of breath gives at least one PCC, including：
It determines when reaching receivable the mandates tunnel quantity thresholds of the PCE, sends and carry the mandate overloading of the PCE and believe
The first message of breath gives at least one PCC.
In said program, after the first message for sending the first key message of carrying is at least one PCC, institute
The method of stating further includes：
Detection obtains the currently received mandate tunnel numbers of the PCE and is not up to the receivable mandate tunnel numbers of the PCE
Mesh threshold value；
The second message for the mandate overloading releasing information for carrying the PCE is sent at least one PCC, so that described
At least one PCC authorizes established tunnel to the PCE.
It is described to judge whether preset tunnel authorization condition is expired based on tunnel authorization request in said program
Foot, including：
Extract the second key message in the tunnel authorization request；Second key message include following information at least
One of：PCC identification informations, tunnel identification information；
Judge whether at least one PCC is that the PCE can receive tunnel authorization based on second key message
Whether the tunnel that PCC or at least one PCC are authorized is the receivable tunnels the PCE；
Determine that at least one PCC is that the PCC or at least one PCC of the receivable tunnel authorizations of the PCE are awarded
When the tunnel of power is the receivable tunnels the PCE, it is considered as preset tunnel authorization condition and is met；Otherwise, it is considered as default
Tunnel authorization condition it is unmet.
In said program, after the first message for sending the first key message of carrying is at least one PCC, institute
The method of stating further includes：
Receive tunnel authorization condition more new command；
Based on the tunnel authorization condition more new command, the preset tunnel authorization condition is updated；
When determining that updated tunnel authorization condition obtains meeting, the third message for carrying third key message is sent to institute
At least one PCC is stated, so that at least one PCC authorizes established tunnel to the PCE；
Wherein, the third key message includes at least one following information：The mandate overloading releasing information of the PCE,
Updated mandate PCC identification informations, updated mandate tunnel identification information.
The embodiment of the present invention additionally provides a kind of PCE, and the PCE includes：Receiving module, judgment module and sending module；
Wherein,
The receiving module, the tunnel authorization request sent for receiving at least one path calculating client PCC；It is described
Tunnel authorization request authorizes established tunnel to the PCE at least one PCC；
The judgment module judges whether preset tunnel authorization condition is expired for being based on the tunnel authorization request
Foot, and trigger the sending module when the preset tunnel authorization condition is unmet；
The sending module, for sending the first message for carrying the first key message at least one PCC, so that
At least one PCC knows the ability that the PCE receives the tunnel authorization request of itself；
Wherein, first key message includes at least one following information：The mandate overloading information of the PCE can connect
Mandate PCC identification informations, the receivable mandate tunnel identification information of receipts.
In said program, the judgment module is additionally operable to obtain the currently received mandate tunnel numbers of the PCE；
Judge whether to reach the receivable mandate tunnels the PCE based on the currently received mandate tunnel numbers of the PCE
Quantity threshold；
When determining the receivable mandate tunnel quantity thresholds of the not up to PCE, it is considered as preset tunnel authorization condition and obtains
To satisfaction；Otherwise, it is unmet to be considered as preset tunnel authorization condition；
Correspondingly, the sending module, it is additionally operable to when reaching the receivable mandate tunnel quantity thresholds of the PCE, hair
Send the first message for the mandate overloading information for carrying the PCE at least one PCC.
In said program, the judgment module is additionally operable to detection and obtains the currently received mandate tunnel numbers of the PCE not
Reach the receivable mandate tunnel quantity thresholds of the PCE, triggers the sending module；
The sending module is additionally operable to send the second message for the mandate overloading releasing information for carrying the PCE to described
At least one PCC, so that at least one PCC authorizes established tunnel to the PCE.
In said program, the judgment module is additionally operable to extract the second key message in the tunnel authorization request；Institute
It includes at least one following information to state the second key message：PCC identification informations, tunnel identification information；
Judge whether at least one PCC is that the PCE can receive tunnel authorization based on second key message
Whether the tunnel that PCC or at least one PCC are authorized is the receivable tunnels the PCE；
Determine that at least one PCC is that the PCC or at least one PCC of the receivable tunnel authorizations of the PCE are awarded
When the tunnel of power is the receivable tunnels the PCE, it is considered as preset tunnel authorization condition and is met；Otherwise, it is considered as default
Tunnel authorization condition it is unmet.
In said program, the PCE further includes update module, for receiving tunnel authorization condition more new command, and is based on
The tunnel authorization condition more new command updates the preset tunnel authorization condition；
The judgment module triggers the transmission mould when being additionally operable to determine that updated tunnel authorization condition obtains meeting
Block；
The sending module, is additionally operable to send the third message for carrying third key message at least one PCC, with
At least one PCC is set to authorize established tunnel to the PCE；
Wherein, the third key message includes at least one following information：The mandate overloading releasing information of the PCE,
Updated mandate PCC identification informations, updated mandate tunnel identification information.
In the embodiment of the present invention, the tunnel authorization request that at least one PCC is sent is received；The tunnel authorization request is used for
At least one PCC authorizes established tunnel to the PCE；Judge that preset tunnel is awarded based on tunnel authorization request
Whether power condition is met；When determining that the preset tunnel authorization condition is unmet, sends and carry the first crucial letter
The first message of breath gives at least one PCC, so that at least one PCC knows that the PCE receives the tunnel of itself and awards
Weigh the ability of request；Wherein, first key message includes at least one following information：The mandate overloading information of the PCE,
Receivable mandate PCC identification informations, receivable mandate tunnel identification information.In this way, PCE carries the first key by sending
The first message of information makes PCC pass through the first key message carried in first message and knows that PCE currently can receive certainly to PCC
The case where tunnel authorization of body, and then when determining that PCE can not receive the tunnel authorization of itself, give the tunnel authorization of foundation to it
Its PCE avoids the tunnel authorization repeated to the same PCE, while reducing PCC and PCE power consumptions, more improves
The working efficiency of PCC and PCE.
Description of the drawings
Fig. 1 is the cross-domain network model schematic diagrames for calculating road of PCE；
Fig. 2 is the flow diagram one of tunnel authorization information processing method in the embodiment of the present invention；
Fig. 3 a are the coded format schematic diagram one of Notification objects in the embodiment of the present invention；
Fig. 3 b are the coded format schematic diagram two of Notification objects in the embodiment of the present invention；
Fig. 4 is the tunnel authorization networking schematic diagram between list PCC, list PCE in the embodiment of the present invention；
Fig. 5 is the flow diagram two of tunnel authorization information processing method in the embodiment of the present invention；
Fig. 6 is the tunnel authorization networking schematic diagram between list PCC, more PCE in the embodiment of the present invention；
Fig. 7 is the flow diagram three of tunnel authorization information processing method in the embodiment of the present invention；
Fig. 8 is the tunnel authorization networking schematic diagram between more PCC, more PCE in the embodiment of the present invention；
Fig. 9 is the flow diagram four of tunnel authorization information processing method in the embodiment of the present invention；
Figure 10 is the composed structure schematic diagram of PCE in the embodiment of the present invention.
Specific implementation mode
The present invention is further described in detail below with reference to the accompanying drawings and embodiments.It should be appreciated that described herein
Specific embodiment is only used to explain the present invention, is not intended to limit the present invention.
Inventor has found in the course of the research, the calculation road mode of traditional Problem with Some Constrained Conditions that topology is collected based on equipment side
Can be good at solving the tunnel building demand in some domain, however, due to can't see cross-domain topology information, for across
Domain tunnel building demand often cannot be satisfied demand, still, need to carry out big topological, multiple domain calculation road in many scenes, this
The whole network, cross-domain topology information are collected with regard to needing a special path computation equipment/component, to complete cross-domain path
It calculates, PCE comes into being.
Traditional router device initiates to calculate road request, referred to as PCC to PCE as the party in request for calculating road request.PCC and
Passage path computing unit communication protocol (PCEP, Path Computation Element Communication between PCE
Protocol the foundation and communication of PCEP sessions are completed).It is as shown in Figure 1 the cross-domain network model schematic diagrames for calculating road of PCE, section
Point Node1 and Node4 is belonging respectively to different domain (Domain), and PCE collects the topology information in two domains.When Node1 need to
When Node4 establishes tunnel, Node1 (PCC role) sends a path computing request for arriving Node4 to PCE, and PCE is tied road is calculated
Fruit (the i.e. routing information of Node1 to Node4：Node1->Node2->Node3->Node4 it) is sent to Node1, then Node1
According to the routing information that PCE is returned, pass through Resource Reservation Protocol (RSVP-TE, Resource based on Traffic Engineering extensions
Reservation Protocol-Traffic Engineering Extension) signaling is accomplished to the tunnel of Node4 and builds
It is vertical.
In basic PCEP session establishment flows, equipment side is as PCC role, passage path computation request message
(PCReq, Path Computation Request) initiates to calculate road request to PCE, and PCE is according to the calculation carried in PCRep message
Road destination address and constraint information carry out calculation road, then calculate response message (PCRep, Path road result passage path is calculated
Computation Reply) equipment side is returned to, equipment lateral root is completed to pass according to specific routing information, by RSVP-TE agreements
The foundation of the traffic engineering tunnel of system.
In the above scheme, when equipment establishes tunnel demand, it is not based on the network topology letter that this equipment was collected
Breath carries out calculation road, but is sent to PCE road request is calculated, and carrying out the calculation road roads Bing Basuan result by PCE returns to equipment.Due to
PCE is it can be seen that cross-domain topology information or can pass through the collaborative interactive between PCE and complete cross-domain calculation road.Therefore, this
Mode can solve the problems, such as the cross-domain calculation road of traditional approach.
With the development of SDN technologies, draft-ietf-pce-stateful-pce drafts propose a kind of stateful PCE
Model, i.e., for equipment side create tunnel can pass through PCRpt (Path Computation LSP State Report)
Authorization of messages can remove the routing information in update tunnel as needed to PCE, then PCE.
For an equipment (as PCC), multiple PCE neighbours can be found by static configuration or automatically, PCC can
With selection one or more PCE is given all tunnel authorizations locallyd create.Since on current protocol interaction, PCC can not
Dynamic knows that each PCE can currently receive the performance in the tunnel authorized, and when there are multiple PCE, local PCC can only go selection to take turns
The mode ask or be randomly assigned is come local tunnel authorization to different PCE, and a PCE also serves multiple PCC, and
The ability of each PCE is also different, so PCC selections uniformly give multiple PCE local tunnel authorization, it is in most cases not
Reasonably.
In embodiments of the present invention, PCE receives the tunnel authorization request that at least one PCC is sent；The tunnel authorization is asked
It asks and authorizes established tunnel to the PCE at least one PCC；Judged based on tunnel authorization request preset
Whether tunnel authorization condition is met；When determining that the preset tunnel authorization condition is unmet, sends and carry first
The first message of key message gives at least one PCC, so that at least one PCC knows that the PCE receives itself
The ability of tunnel authorization request；Wherein, first key message includes at least one following information：The mandate of the PCE is super
Lotus information, receivable mandate PCC identification informations, receivable mandate tunnel identification information.
Embodiment one
Fig. 2 is the flow diagram one of tunnel authorization information processing method in the embodiment of the present invention, as shown in Fig. 2, this hair
Tunnel authorization information processing method includes in bright embodiment：
Step 101：Receive the tunnel authorization request that at least one PCC is sent.
Here, the tunnel authorization request authorizes established tunnel to the PCE at least one PCC；Institute
Stating tunnel authorization request can be sent by PCRpt message；Following information is carried in the tunnel authorization request (PCRpt message)
At least one：PCC identification informations, tunnel identification information；Wherein, PCC identification informations send tunnel authorization request for identifying
PCC, tunnel identification information such as identifies the type in the tunnel for identifying the tunnel that the PCC licenses to PCE.
In actual implementation, before PCE receives the tunnel authorization request that at least one PCC is sent, the method further includes：
The PECP session communications that PCE is established between at least one PCC connect.
Step 102：Judge whether preset tunnel authorization condition is met based on tunnel authorization request.
In practical applications, the preset tunnel authorization condition can be to judge whether to connect according to actual needs setting
Receive the condition of the tunnel authorization request of PCC.
In one embodiment, the maximum that tunnel authorization condition can be born according to PCE authorizes the number in tunnel to set,
The currently received mandate tunnel numbers of PCE described in the tunnel authorization acquisition request that PCE is sent based on PCC；
Judge whether to reach the receivable mandate tunnels the PCE based on the currently received mandate tunnel numbers of the PCE
Quantity threshold；
When determining the receivable mandate tunnel quantity thresholds of the not up to PCE, it is considered as preset tunnel authorization condition and obtains
To satisfaction；Otherwise, it is unmet to be considered as preset tunnel authorization condition.
Here, the receivable maximums for authorizing tunnel quantity threshold that can be born according to PCE of PCE authorize tunnel number to set
Fixed, as set, PCE is receivable to authorize tunnel quantity threshold to be equal to the maximum mandate tunnel number that PCE can be born, alternatively, setting
The receivable maximum mandate tunnel numbers for authorizing tunnel quantity threshold that can be born for the PCE of particular percentile of PCE are determined, such as institute
It is 80% to state particular percentile.
In another embodiment, tunnel authorization condition can also be asked according to tunnel type (Tunnel Identifier) or tunnel authorization
Sender, i.e. PCC sets, such as：Setting PCE only receives the mandate in the tunnel of some type, or only receives certain specific
The tunnel authorization of PCC.
Correspondingly, PCE extracts PCC identification informations, the tunnel identification information etc. carried in the tunnel authorization request, it is based on
The information of extraction judge at least one PCC whether be the PCE can receive tunnel authorization PCC or described at least one
Whether the tunnel that a PCC is authorized is the receivable tunnels the PCE；Determine that at least one PCC is that the PCE can receive tunnel
When the tunnel that the PCC of road mandate or at least one PCC are authorized is the receivable tunnels the PCE, it is considered as preset tunnel
Road authorising conditional is met；Otherwise, it is unmet to be considered as preset tunnel authorization condition.
Step 103：When determining that the preset tunnel authorization condition is unmet, sends and carry the first key message
First message gives at least one PCC, so that at least one PCC knows that the PCE receives the tunnel authorization of itself and asks
The ability asked.
Here, first key message includes at least one following information：The mandate overloading information of the PCE can connect
Mandate PCC identification informations, the receivable mandate tunnel identification information of receipts.
In actual implementation, the first key message can be different according to the difference of different tunnel authorization conditions, such as：When
Judge whether the tunnel authorization condition is met, to judge whether the currently received mandate tunnel numbers of PCE reach described
Corresponding when the receivable mandate tunnel quantity thresholds of PCE, first key message includes the mandate overloading letter of the PCE
Breath；In this way, when the PCE mandate tunnel numbers received reach receivable the mandates tunnel quantity thresholds of the PCE, be considered as described in
The tunnel authorization excess load that PCE is received can not receive tunnel authorization again, and mandate overloadings of the PCC based on the carrying PCE received is believed
The first message of breath learns PCE excess loads, and then does not retransmit authorization requests to PCE, selects others PCE to be authorized, carries
The high working efficiency of PCC and PCE.
In practical applications, the first message can be PCNtf (PCEP Notification) message, the PCNtf
Message carries a Notification object, is as shown in Figure 3a the coded format schematic diagram of the Notification objects
One, indicate that PCE can receive the tunnel that PCC is sent by expanded definition Notification Type and Notification Value
The ability of road authorization requests, such as：Overloading is authorized to notify thing to characterize PCE by setting Notification Type (NT)=3
Part, setting Notification Value (NV)=1 characterization PCE mandate overloadings, and the Object- of Notification objects
Class=12 and Object-Type (OT)=1 still use original definition in RF5440.It is sent when PCC receives PCE
PCNtf message no longer can carry out tunnel authorization by PCE overloadings known to parsing to the PCE, but select other
PCE, improve work efficiency.
In another embodiment, when judge the tunnel authorization condition whether obtain meet it is described at least one to judge
Corresponding when whether PCC is the PCC that PCE can receive tunnel authorization, the first key message includes receivable mandate PCC marks
Information；In this way, when the sender for the tunnel authorization request that PCE is received not can receive the row of PCC of tunnel authorization in PCE, just
The PCC itself is notified not have the ability for receiving its tunnel authorization, and first carried by first message by first message
Key message enables PCC learn that itself can receive the PCC of tunnel authorization.
In another embodiment, when judge the tunnel authorization condition whether obtain meet it is described at least one to judge
When whether the tunnel that PCC is authorized is the receivable tunnels PCE, corresponding, the first key message includes the receivable mandate tunnels of PCE
Road identification information；In this way, when tunnel that PCE is authorized to (i.e. the tunnel that identifies during the tunnel authorization of PCC is asked) be not itself can
When the row in the mandate tunnel of reception, it will pass through first message and the PCC itself notified not have the ability for receiving its tunnel authorization, and
PCC itself is notified to can receive the tunnel authorized by the first key message that first message carries.
Based on the above embodiment of the present invention, in practical applications, PCE is had found certainly based on the tunnel authorization request that PCC is sent
The tunnel authorization condition of body is unmet, such as itself overloading (reaching the receivable mandate tunnel quantity thresholds of the PCE),
It is rejected by the tunnel authorization request of the PCC, PCUpd (the Path Computation resetted by one authorization flag position of response
LSP Update Request) message come identify refuse the PCC authorization requests；Correspondingly, the tunnel that PCE is sent based on PCC
Authorization requests find that the tunnel authorization condition of itself is met, and such as itself non-overloading, the tunnel authorization that can receive the PCC is asked
It asks, the authorization requests for receiving the PCC is identified by the PCUpd message of one authorization flag position of response position, certainly, in reality
When implementation, if PCE has received the tunnel authorization request of PCC, the PCUpd message of the authorization flag position position can not be also sent,
Acquiescence receives.
In one embodiment, when actual implementation, tunnel authorization to PCE before certain PCC can cancel to PCE results in
The tunnel authorization condition of PCE is met (the not up to receivable mandate tunnel quantity thresholds of PCE), at this point, PCE can be sent out
Send the second message for the mandate overloading releasing information for carrying PCE to PCC, so that PCC knows that the PCE receives the tunnel of itself and awards
The ability of request is weighed, and then continues to carry out tunnel authorization to the PCE.Here second message can be PCNtf message, pass through expansion
Notification Value (NV) characterizations for opening up the Notification objects that PCNtf message carries authorize overloading to release, such as
It sets Notification Value (NV)=2 and characterizes PCE mandate overloading releasings, as shown in Figure 3b.
In one embodiment, when actual implementation, the tunnel authorization condition of PCE may be changed, such as：PCE is received
The tunnel authorization condition more new command that user sends, is updated the tunnel authorization condition of itself based on the instruction, and updates
Tunnel authorization condition afterwards will pass through message informing PCC when obtaining meeting, so that PCC knows that the PCE receives the tunnel of itself
The ability of authorization requests, and then continue to carry out tunnel authorization to the PCE.
Using the embodiment of the present invention, after PCE receives the tunnel authorization request of PCC, the tunnel authorization condition of itself is judged
Whether met, when unmet, by the message informing PCC, so that the PCC, which learns itself not have, receives its tunnel
The ability of road mandate, and then PCC selection others PCE is made to carry out tunnel authorization, and when PCE detects the tunnel authorization item of itself
When part obtains meeting, again by message informing PCC, the ability for making it learn itself but also with its tunnel authorization of reception,
That is, PCC dynamic sensings PCE can be allowed to receive the capacity variations of PCC tunnel authorizations, to the tunnel authorization of rational decision local
PCE, the problem for reducing authorization failure to the greatest extent and authorizing load sharing unreasonable improve the work effect of PCC and PCE
Rate.
Embodiment two
Fig. 4 is the tunnel authorization networking schematic diagram between list PCC, list PCE in the embodiment of the present invention；As shown in figure 4, network section
Point Node1 sets up PCEP as PCC role and PCE1 and connects, due to no other optional PCE, when NODE1 creates local
Behind tunnel, PCE1 is directly licensed to.
Fig. 5 is the flow diagram two of tunnel authorization information processing method in the embodiment of the present invention, in conjunction with Fig. 4, Fig. 5 institute
Show, tunnel authorization information processing method includes in the embodiment of the present invention：
Step 200：PCE1 establishes the PCEP session connections with PCC.
In the present embodiment, PCC, that is, Node1.
Step 201：PCE1 receives the tunnel authorization request that PCC is sent.
Here, tunnel authorization request is sent in the form of PCRpt message.
Step 202：Whether judgement currently reaches itself receivable mandate tunnel quantity threshold, if reaching itself can connect
The mandate tunnel quantity threshold of receipts executes step 203；If not up to itself receivable mandate tunnel quantity threshold executes
Step 206.
Here, the number in the mandate tunnel that PCE1 itself has currently been received based on the tunnel authorization acquisition request that PCC is sent
And itself receivable mandate tunnel quantity threshold, to judge currently whether reach itself receivable mandate tunnel number threshold
Value；Wherein, the receivable maximums for authorizing tunnel quantity threshold that can be born according to PCE1 of PCE1 authorize tunnel number to set,
As in the present embodiment, the receivable maximums for authorizing tunnel quantity threshold that can be born equal to PCE1 of setting PCE1 authorize tunnel
Number (such as 200).
Step 203：It sends and carries the first message for authorizing overloading information to PCC, so that PCC knows that PCE1 receives itself
The ability of tunnel authorization request.
In actual implementation, the first message is PCNtf (NT=3, NV=1) message.
Based on the first message, PCC does not retransmit tunnel authorization and asks to PCE1, alternatively, being moved back using preset index
Rule is kept away to attempt to initiate tunnel authorization request to PCE1, such as：Time of the tunnel authorization away from first time is initiated in second of trial of PCC
For 10s, third time is attempted away from second of 20s, is attempted away from third time 30s for the 4th time, and so on.
Step 204：Whether detection currently reaches itself receivable mandate tunnel quantity threshold, if not up to itself can
The mandate tunnel quantity threshold of reception executes step 205；It is no to then follow the steps 204.
Step 205：The second message for carrying and overloading being authorized to release information is sent to PCC.
In actual implementation, the PCC in addition to Node1 may cancel the tunnel authorization to PCE1, lead to the tunnel of PCE1
Road authorising conditional is met, i.e., the receivable mandate tunnel quantity thresholds of not up to PCE1, and then PCE1 passes through message informing
Node1, so that Node1 knows the ability that PCE1 receives the tunnel authorization request of itself.In the present embodiment, the second message
For PCNtf (NT=3, NV=2) message.After Node1 receives second message, it is known that PCE1 can receive the tunnel authorization of itself and ask
It asks, and then continues to carry out tunnel authorization to PCE1.
Step 206：Tunnel authorization confirmation message is sent to PCC.
In the present embodiment, the tunnel authorization confirmation message is the PCUpd message of a mandate flag set；When
So, in practical applications, this step can be ignored, i.e. PCE1 does not send confirmation message, but gives tacit consent to the tunnel authorization for receiving PCC
Request.
Embodiment three
Fig. 6 is the tunnel authorization networking schematic diagram between list PCC, more PCE in the embodiment of the present invention；As shown in fig. 6, network section
Point Node1 sets up PCEP as PCC role and PCE1, PCE2 and connects, and Node1 has been established according to local strategy local
Tunnel authorization to PCE1, PCE2.
Fig. 7 is the flow diagram three of tunnel authorization information processing method in the embodiment of the present invention, in conjunction with Fig. 6, Fig. 7 institute
Show, tunnel authorization information processing method includes in the embodiment of the present invention：
Step 301：PCE1 receives the tunnel authorization request that PCC is sent.
Here, tunnel authorization request is sent in the form of PCRpt message.
Based on the present embodiment, in practical applications, before this step, PCC is established and the PCEP sessions between PCE1, PCE2 connect
It connects.
Step 302：It is asked based on the tunnel authorization, PCE1 judges whether tunnel authorization condition meets, if the tunnel
Road authorising conditional does not meet, executes step 303；If the tunnel authorization condition meets, do not deal with.
Here, PCE1 judge tunnel authorization condition whether meet including：
PCE1 based on the tunnel authorization acquisition request that PCC is sent itself currently received mandate tunnel number and from
The receivable mandate tunnel quantity threshold of body, to judge currently whether reach itself receivable mandate tunnel quantity threshold, when
When reaching itself receivable mandate tunnel quantity threshold, determine that tunnel authorization condition does not meet, when not up to itself can receive
Mandate tunnel quantity threshold when, determine tunnel authorization condition meet；
Wherein, the receivable maximum mandate tunnel numbers for authorizing tunnel quantity threshold that can be born according to PCE1 of PCE1 are come
Setting, such as in the present embodiment, the receivable PCE1 for authorizing tunnel quantity threshold to be equal to particular percentile of setting PCE1 can
The maximum mandate tunnel number born, if the particular percentile is that the maximum mandate tunnel number that 80%, PCE1 can be born is
200, then the receivable mandate tunnel quantity thresholds of PCE1 are 160.
Step 303：The first message for carrying the first key message is sent to PCC, so that PCC knows that PCE1 receives itself
The ability of tunnel authorization request.
In actual implementation, first key message includes the mandate overloading information of the PCE1, the first message
For PCNtf (NT=3, NV=1) message.
Based on the first message, PCC does not retransmit tunnel authorization and asks to PCE1, and due in the present embodiment, PCC
(Node1) PECP session connections are also established with PCE2, and then PCC may be selected PCE2 and carry out tunnel authorization, to reduce to
PCE1 carries out the mortality of tunnel authorization, improves work efficiency.
Step 304：Tunnel authorization condition more new command is received, and tunnel is updated based on tunnel authorization condition more new command
Authorising conditional.
Here, the tunnel authorization condition more new command can be user's triggering, and the tunnel authorization condition update refers to
Newer tunnel authorization conditional information can be carried in order, such as changed the receivable mandate tunnel quantity thresholds of PCE1, such as increased
The receivable mandate tunnel quantity thresholds of PCE1.
Step 305：Judge whether current tunnel authorization condition meets, if the tunnel authorization condition meets, executes
Step 306；If the tunnel authorization condition does not meet, step 305 is executed.
Here, in actual implementation, if updated tunnel authorization condition increases the receivable mandate tunnel numbers of PCE1
Mesh threshold value, then current tunnel authorization condition met, i.e. PCE1 have again receive PCC tunnel authorization ability.
Step 306：The third message for carrying third key message is sent to PCC.
In the present embodiment, the third key message includes that the mandate overloading of the PCE1 releases information, the third
Message is PCNtf (NT=3, NV=2) message.After Node1 receives third message, it is known that PCE1 can receive the tunnel authorization of itself
Request, and then can continue to carry out tunnel authorization to PCE1.
Step 307：Terminate this process flow.
Example IV
Fig. 8 is the tunnel authorization networking schematic diagram between more PCC, more PCE in the embodiment of the present invention；As shown in figure 8, network section
Point Node1, Node2 sets up PCEP as PCC role and PCE1, PCE2 and connects, Node1, Node2 according to local strategy,
Local established tunnel authorization to PCE1, PCE2.
Fig. 9 is the flow diagram four of tunnel authorization information processing method in the embodiment of the present invention, in conjunction with Fig. 8, Fig. 9 institute
Show, tunnel authorization information processing method includes in the embodiment of the present invention：
Step 401：PCE1 receives the tunnel authorization request that Node1 is sent.
In the present embodiment, tunnel authorization request is sent in the form of PCRpt message.
Step 402：The second key message in tunnel authorization request is extracted, preset tunnel is judged based on the second key message
Whether road authorising conditional is met, if unmet, executes step 403；It is not dealt with if obtaining meeting.
Here, the second key message includes：PCC identification informations, tunnel identification information；Wherein, PCC identification informations are for marking
Know the PCC for sending tunnel authorization request, i.e. Node1, tunnel identification information is licensed to for identifying the PCC (Node1)
The tunnel of PCE1 such as identifies the type in the tunnel.
Second key message that is based on judges whether preset tunnel authorization condition is met, including：
PCC identification informations, the tunnel identification information that PCE1 is obtained based on extraction, judge whether Node1 is that the PCE1 can
Whether the tunnel for receiving PCC or the Node1 mandate of tunnel authorization is the receivable tunnels PCE1；
Determine Node1 be PCE1 can receive tunnel authorization PCC or Node1 authorize tunnel be PCE1 receivable
When tunnel, it is considered as preset tunnel authorization condition and is met；Otherwise, it is unmet to be considered as preset tunnel authorization condition.
Such as：The specified tunnel authorizations for receiving Node2 of PCE1, or the tunnel authorization that tunnel type is type one is received, and here,
It is type two that Node1, which authorizes the tunnel type in tunnel, then PCE1 be based on PCC identification informations, tunnel identification information can determine neither
Itself can receive the PCC of tunnel authorization, and also the tunnel of non-self receivable tunnel authorization, i.e. tunnel authorization condition are not expired
Foot.
In the present embodiment, when PCE1 determines that preset tunnel authorization condition obtains meeting, acquiescence receives tunnel authorization
Request, does not respond Node1.
Step 403：The first message for carrying the first key message is sent to Node1 so that Node1 know PCE1 received from
The ability of the tunnel authorization request of body.
Here, in the present embodiment, the first key message includes：Receivable mandate PCC identification informations receivable are awarded
Weigh tunnel identification information.When actual implementation, Node1 based on PCE1 known to the first key message carried in first message received from
The ability of the tunnel authorization of body, what such as the first key message included is the mark of Node2 and the tunnel that tunnel type is type one
Road identifies, then the tunnel type that PCE1 known to Node1 cannot receive itself transmission is the tunnel authorization of type two, and PCE2 may be selected
Tunnel authorization is carried out, unnecessary power wastage is avoided.And correspondingly, for the tunnel authorization that Node2 is sent, then PCE1 can
It receives.
When actual implementation, first message is PCNtf (NT=3, NV=1) message.
Step 404：Tunnel authorization condition more new command is received, and preset based on the update of tunnel authorization condition more new command
Tunnel authorization condition.
Based on the above embodiment of the present invention, in practical applications, user may change the tunnel authorization of the PCE1 of setting
Tunnel authorization condition is such as updated to only receive the tunnel authorization of Node1 by condition.
Step 405：Determine that updated tunnel authorization condition is met, the third for sending carrying third key message disappears
It ceases to Node1, so that Node1 authorizes established tunnel to the PCE.
In the present embodiment, the third key message includes：Updated mandate PCC identification informations updated are awarded
Weigh tunnel identification information.
When actual implementation, PCE1 detects the ability for itself having the tunnel authorization for receiving Node1, sends and carries third
The third message of key message is to Node1, so that Node1 learns the ability that PCE1 has the tunnel authorization for receiving Node1, into
And continue tunnel authorization to PCE1；Third key message includes：Updated mandate PCC identification informations, updated mandate tunnel
Road identification information.
Step 406：Terminate this process flow.
Embodiment five
Figure 10 is the composed structure schematic diagram of PCE in the embodiment of the present invention, as shown in Figure 10, PCE in the embodiment of the present invention
Including：Receiving module 11, judgment module 12 and sending module 13；Wherein,
The receiving module 11, the tunnel authorization request sent for receiving at least one path calculating client PCC；Institute
State tunnel authorization request authorizes established tunnel to the PCE at least one PCC；
The judgment module 12 judges whether preset tunnel authorization condition obtains for being based on the tunnel authorization request
Meet, and the sending module 13 is triggered when the preset tunnel authorization condition is unmet；
The sending module 13, for sending the first message of the first key message of carrying at least one PCC, with
The ability for making at least one PCC know that the PCE receives the tunnel authorization request of itself；
Wherein, first key message includes at least one following information：The mandate overloading information of the PCE can connect
Mandate PCC identification informations, the receivable mandate tunnel identification information of receipts.
In one embodiment, the judgment module 12 is additionally operable to obtain the currently received mandate tunnel numbers of the PCE；
Judge whether to reach the receivable mandate tunnels the PCE based on the currently received mandate tunnel numbers of the PCE
Quantity threshold；
When determining the receivable mandate tunnel quantity thresholds of the not up to PCE, it is considered as preset tunnel authorization condition and obtains
To satisfaction；Otherwise, it is unmet to be considered as preset tunnel authorization condition；
Correspondingly, the sending module 13, be additionally operable to send the first message of the mandate overloading information for carrying the PCE to
At least one PCC.
In one embodiment, the judgment module 12 is additionally operable to detection and obtains the currently received mandate tunnel numbers of the PCE
Mesh is not up to the receivable mandate tunnel quantity thresholds of the PCE, triggers the sending module；
The sending module 13 is additionally operable to send the second message for the mandate overloading releasing information for carrying the PCE to institute
At least one PCC is stated, so that at least one PCC authorizes established tunnel to the PCE.
In one embodiment, the judgment module 12 is additionally operable to extract the second crucial letter in the tunnel authorization request
Breath；Second key message includes at least one following information：PCC identification informations, tunnel identification information；
Judge whether at least one PCC is that the PCE can receive tunnel authorization based on second key message
Whether the tunnel that PCC or at least one PCC are authorized is the receivable tunnels the PCE；
Determine that at least one PCC is that the PCC or at least one PCC of the receivable tunnel authorizations of the PCE are awarded
When the tunnel of power is the receivable tunnels the PCE, it is considered as preset tunnel authorization condition and is met；Otherwise, it is considered as default
Tunnel authorization condition it is unmet.
In one embodiment, the PCE further includes update module 14, for receiving tunnel authorization condition more new command, and
Based on the tunnel authorization condition more new command, the preset tunnel authorization condition is updated；
The judgment module 12 triggers the transmission when being additionally operable to determine that updated tunnel authorization condition obtains meeting
Module；
The sending module 13, is additionally operable to send the third message for carrying third key message at least one PCC,
So that at least one PCC authorizes established tunnel to the PCE；
Wherein, the third key message includes at least one following information：The mandate overloading releasing information of the PCE,
Updated mandate PCC identification informations, updated mandate tunnel identification information.
It need to be noted that be：Above is referred to the descriptions of PCE, are similar with above method description, with having for method
Beneficial effect description, does not repeat.For undisclosed technical detail in PCE embodiments of the present invention, present invention side is please referred to
The description of method embodiment.
It will be appreciated by those skilled in the art that：Realize that all or part of step of above method embodiment can pass through journey
Sequence instructs relevant hardware to complete, and program above-mentioned can be stored in a 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 is deposited at random
Access to memory (RAM, Random Access Memory), read-only memory (ROM, Read-Only Memory), magnetic disc or
The various media that can store program code such as CD.
If alternatively, the above-mentioned integrated unit of the present invention is realized in the form of software function module and as independent product
Sale in use, can also be stored in a computer read/write memory medium.Based on this understanding, the present invention is implemented
The technical solution of example substantially in other words can be expressed in the form of software products the part that the relevant technologies contribute,
The computer software product is stored in a storage medium, including some instructions are used so that computer equipment (can be with
It is personal computer, server or network equipment etc.) execute all or part of each embodiment the method for the present invention.
And storage medium above-mentioned includes：Movable storage device, RAM, ROM, magnetic disc or CD etc. are various can to store program code
Medium.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of tunnel authorization information processing method, which is characterized in that it is applied to path-calculating element PCE, the method includes：
Receive the tunnel authorization request that at least one path calculating client PCC is sent；The tunnel authorization request is for described
At least one PCC authorizes established tunnel to the PCE；
Judge whether preset tunnel authorization condition is met based on tunnel authorization request；
When determining that the preset tunnel authorization condition is unmet, the first message for carrying the first key message is sent to institute
At least one PCC is stated, so that at least one PCC knows the ability that the PCE receives the tunnel authorization request of itself；
Wherein, first key message includes at least one following information：It is the mandate overloading information of the PCE, receivable
Authorize PCC identification informations, receivable mandate tunnel identification information.
2. according to the method described in claim 1, it is characterized in that, described judge preset tunnel based on tunnel authorization request
Whether road authorising conditional is met, including：
Obtain the currently received mandate tunnel numbers of the PCE；
Judge whether to reach the receivable mandate tunnel numbers of the PCE based on the currently received mandate tunnel numbers of the PCE
Threshold value；
When determining the receivable mandate tunnel quantity thresholds of the not up to PCE, being considered as preset tunnel authorization condition is expired
Foot；Otherwise, it is unmet to be considered as preset tunnel authorization condition；
Correspondingly, when the determination preset tunnel authorization condition is unmet, sends and carry the first key message
First message gives at least one PCC, including：
It determines when reaching receivable the mandates tunnel quantity thresholds of the PCE, sends the mandate overloading information of the carrying PCE
First message gives at least one PCC.
3. according to the method described in claim 2, it is characterized in that, it is described send carry the first key message first message to
After at least one PCC, the method further includes：
Detection obtains the currently received mandate tunnel numbers of the PCE and is not up to the receivable mandate tunnel number thresholds of the PCE
Value；
The second message of the mandates overloading releasing information for carrying the PCE is sent at least one PCC so that it is described at least
One PCC authorizes established tunnel to the PCE.
4. according to the method described in claim 1, it is characterized in that, described judge preset tunnel based on tunnel authorization request
Whether road authorising conditional is met, including：
Extract the second key message in the tunnel authorization request；Second key message include following information at least it
One：PCC identification informations, tunnel identification information；
Based on second key message judge at least one PCC whether be the PCE can receive tunnel authorization PCC,
Or whether the tunnel that at least one PCC is authorized is the receivable tunnels the PCE；
Determine that at least one PCC is that the PCC or at least one PCC of the receivable tunnel authorizations of the PCE are authorized
When tunnel is the receivable tunnels the PCE, it is considered as preset tunnel authorization condition and is met；Otherwise, it is considered as preset tunnel
Road authorising conditional is unmet.
5. according to the method described in claim 1, it is characterized in that, it is described send carry the first key message first message to
After at least one PCC, the method further includes：
Receive tunnel authorization condition more new command；
Based on the tunnel authorization condition more new command, the preset tunnel authorization condition is updated；
When determining that updated tunnel authorization condition obtains meeting, send carry third key message third message to it is described extremely
A few PCC, so that at least one PCC authorizes established tunnel to the PCE；
Wherein, the third key message includes at least one following information：The mandate overloading of the PCE releases information, update
Mandate PCC identification informations, updated mandate tunnel identification information afterwards.
6. a kind of path-calculating element PCE, which is characterized in that the PCE includes：Receiving module, judgment module and sending module；
Wherein,
The receiving module, the tunnel authorization request sent for receiving at least one path calculating client PCC；The tunnel
Authorization requests authorize established tunnel to the PCE at least one PCC；
The judgment module judges whether preset tunnel authorization condition is met for being based on the tunnel authorization request,
And trigger the sending module when the preset tunnel authorization condition is unmet；
The sending module, for sending the first message for carrying the first key message at least one PCC, so that described
At least one PCC knows the ability that the PCE receives the tunnel authorization request of itself；
Wherein, first key message includes at least one following information：It is the mandate overloading information of the PCE, receivable
Authorize PCC identification informations, receivable mandate tunnel identification information.
7. PCE according to claim 6, which is characterized in that
The judgment module is additionally operable to obtain the currently received mandate tunnel numbers of the PCE；
Judge whether to reach the receivable mandate tunnel numbers of the PCE based on the currently received mandate tunnel numbers of the PCE
Threshold value；
When determining the receivable mandate tunnel quantity thresholds of the not up to PCE, being considered as preset tunnel authorization condition is expired
Foot；Otherwise, it is unmet to be considered as preset tunnel authorization condition；
Correspondingly, the sending module, it is additionally operable to when reaching the receivable mandate tunnel quantity thresholds of the PCE, transmission is taken
The first message of mandate overloading information with the PCE gives at least one PCC.
8. PCE according to claim 7, which is characterized in that
The judgment module is additionally operable to detection and obtains the currently received mandate tunnel numbers of the PCE and be not up to the PCE can connecing
The mandate tunnel quantity threshold of receipts, triggers the sending module；
The sending module, be additionally operable to send the second message of the mandates overloading releasing information for carrying the PCE to it is described at least
One PCC, so that at least one PCC authorizes established tunnel to the PCE.
9. PCE according to claim 6, which is characterized in that
The judgment module is additionally operable to extract the second key message in the tunnel authorization request；Second key message
Including at least one following information：PCC identification informations, tunnel identification information；
Based on second key message judge at least one PCC whether be the PCE can receive tunnel authorization PCC,
Or whether the tunnel that at least one PCC is authorized is the receivable tunnels the PCE；
Determine that at least one PCC is that the PCC or at least one PCC of the receivable tunnel authorizations of the PCE are authorized
When tunnel is the receivable tunnels the PCE, it is considered as preset tunnel authorization condition and is met；Otherwise, it is considered as preset tunnel
Road authorising conditional is unmet.
10. PCE according to claim 6, which is characterized in that the PCE further includes update module, is awarded for receiving tunnel
Power condition more new command, and it is based on the tunnel authorization condition more new command, update the preset tunnel authorization condition；
The judgment module triggers the sending module when being additionally operable to determine that updated tunnel authorization condition obtains meeting；
The sending module is additionally operable to send the third message for carrying third key message at least one PCC, so that institute
Stating at least one PCC authorizes established tunnel to the PCE；
Wherein, the third key message includes at least one following information：The mandate overloading of the PCE releases information, update
Mandate PCC identification informations, updated mandate tunnel identification information afterwards.
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| PCT/CN2018/077727 WO2018166353A1 (en) | 2017-03-13 | 2018-03-01 | Tunnel authorisation information processing method, path computation element and storage medium |
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