CN108513180A - A kind of path establishment method and device - Google Patents
A kind of path establishment method and device Download PDFInfo
- Publication number
- CN108513180A CN108513180A CN201710114715.3A CN201710114715A CN108513180A CN 108513180 A CN108513180 A CN 108513180A CN 201710114715 A CN201710114715 A CN 201710114715A CN 108513180 A CN108513180 A CN 108513180A
- Authority
- CN
- China
- Prior art keywords
- path
- otucn
- node equipment
- label
- message
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0071—Provisions for the electrical-optical layer interface
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0073—Provisions for forwarding or routing, e.g. lookup tables
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0077—Labelling aspects, e.g. multiprotocol label switching [MPLS], G-MPLS, MPAS
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0086—Network resource allocation, dimensioning or optimisation
Abstract
The invention discloses a kind of path establishment methods, are applied to first node equipment, including：First path is sent based on service layer path and establishes request message, to establish the path with second node equipment room OTUCn/OTUCn M signal types；The first resource reserving message for carrying the first label is received, and the path with second node equipment room OTUCn/OTUCn M signal types is established based on first resource reserving message；Wherein, the first label at least carries branch end number information, service layer's interface type and tag length information；The path of OTUCn/OTUCn M signal types based on foundation sends the second path and establishes request message, to establish the path with second node equipment room ODUCn signal types；The Secondary resource reserving message for carrying the second label is received, and the path with second node equipment room ODUCn signal types is established based on Secondary resource reserving message, to carry customer service；Wherein, the tag format of second label is identical as the tag format of the first label.The invention also discloses a kind of paths to establish device.
Description
Technical field
The present invention relates to control plane technology field in optic communication more particularly to a kind of path establishment methods of optical transfer network
And device.
Background technology
Optic communication achieves greater advance, the G.709 introducing of latest edition in recent years in terms of high speed and the flexible evolution of full light
The optical transport unit of higher rate (OTU, Optical Transform Unit) signal, that is, completely standardized light pass
Send unit-Cn (OTUCn, completely standardized Optical Transport Unit-Cn), the mark of OTUCn
It is n × 100G to claim rate, supports 5G time slot granularities.OTUCn can be used for carrying the arbitrary client signal more than 100G rates.
It is existing for the standard of the optical transport network (OTN, Optical Transport Network) of above-mentioned super 100G
Control plane technology be only capable of providing the distribution to time slot, bind interface related configuration without supporting.Therefore it provides a kind of light
Scheme is established in transmission net path, can be applied to the fields super 100G OTN, and supports to bind interface related configuration, it has also become urgently
Problem to be solved.
Invention content
A kind of path establishment method of offer of the embodiment of the present invention and device, solve at least existing in the prior art ask
Topic can be applied to the fields super 100G OTN, and support to bind interface related configuration.
What the technical solution of the embodiment of the present invention was realized in：
An embodiment of the present invention provides a kind of path establishment method, the method is applied to first node equipment, the side
Method includes：
First path, which is sent, based on service layer path establishes request message；The first path establishes request message for asking
Ask foundation and completely standardized optical transport unit-Cn (OTUCn, the completely standardized of second node equipment room
Optical Transport Unit-Cn) signal type or OTUCn-M signal types path；
The first resource reserving message for carrying the first label is received, and based on first resource reserving message foundation and institute
State the path of second node equipment room OTUCn/OTUCn-M signal types；Wherein, first label at least carries tributary port
Number information, service layer's interface type and tag length information；
The path of the OTUCn/OTUCn-M signal types based on foundation sends the second path and establishes request message；Institute
State the second path establish request message for ask establish and second node equipment room light data unit-Cn ODUCn signal types
Path；
The Secondary resource reserving message for carrying the second label is received, and based on Secondary resource reserving message foundation and institute
The path for stating second node equipment room ODUCn signal types, to carry customer service；Wherein, the label lattice of second label
Formula is identical as the tag format of the first label.
In said program, before establishing request message based on service layer's path transmission first path, the method further includes：
Customer service request is received, and determines that the customer service needs the first segment based on customer service request
Point device is carried to the path of the ODUCn signal types of second node equipment room.
It is described that request message is established based on service layer's path transmission first path in said program, including：
Based on service layer path, sends first path through at least one intermediary device and establish request message to described the
Two node devices.
In said program, the method further includes：
At least one intermediary device is based respectively on the resource reservation that the next-hop node equipment of itself is sent and disappears
Breath completes local resource reservation, and generates corresponding resource reservation message and be sent to the upper hop node device of itself；
Correspondingly, the first resource reserving message for receiving the first label of carrying, including：
The next-hop node equipment for receiving the first node equipment completes the described of local resource reservation transmission later
First resource reserving message.
In said program, the path of the OTUCn/OTUCn-M signal types based on foundation sends the second path
Request message is established, including：
The path of the OTUCn/OTUCn-M signal types based on foundation directly transmits the foundation request of the second path and disappears
It ceases to the second node equipment.
In said program, the Secondary resource reserving message for receiving the second label of carrying, including：
Directly receive the Secondary resource reserving message for the second label of carrying that the second node equipment is sent；Described second
Label at least carries：Branch end number information, service layer's interface type, tag length information, time slot bit bitmap, it is unavailable when
Gap number.
In said program, first path establishes request message and carries route display object ERO subobjects；ERO is right
As carrying：Service layer's interface number, service layer's interface rate and maximum unavailable number of time slot information；The method is also wrapped
It includes：
It is pre- that at least one intermediary device is based respectively on the resource that the next-hop intermediary device of itself is sent
It stays the message to complete local resource reservation, and completes to build fractional rate path between the next-hop intermediary device of itself
It is vertical, and generate corresponding resource reservation message and be sent to the upper hop node device of itself；
Wherein, the resource reservation message between intermediary device carries recording routing object RRO；What the RRO was carried
Label includes position and the information of number of unavailable time slot.
The embodiment of the present invention additionally provides a kind of path and establishes device, and described device is applied to first node equipment；It is described
Device includes：First sending module, the first receiving module, the second sending module and the second receiving module；
First sending module establishes request message for being based on service layer's path transmission first path；Described first
Request message is established for ask to establish and second node equipment room OTUCn signal types or OTUCn-M signal types in path
Path；
First receiving module for receiving the first resource reserving message for carrying the first label, and is based on described the
One resource reservation message establishes the path with the second node equipment room OTUCn/OTUCn-M signal types；Wherein, described
One label at least carries branch end number information, service layer's interface type and tag length information；
Second sending module, the path for the OTUCn/OTUCn-M signal types based on foundation send the
Request message is established in two paths；Second path establish request message for ask establish and second node equipment room ODUCn
The path of signal type；
Second receiving module for receiving the Secondary resource reserving message for carrying the second label, and is based on described the
Two resource reservation message establish the path with the second node equipment room ODUCn signal types, to carry customer service；Its
In, the tag format of second label is identical as the tag format of the first label.
In said program, first receiving module is additionally operable to receive customer service request, and is based on the customer service
Request determines that the customer service needs the first node equipment to the path of the ODUCn signal types of second node equipment room
To carry.
In said program, first sending module is additionally operable to be based on service layer path, be set through at least one intermediate node
Preparation send first path to establish request message to the second node equipment.
In said program, first receiving module, the next-hop node for being additionally operable to receive the first node equipment is set
The standby first resource reserving message for completing to send after local resource reservation.
In said program, second sending module is additionally operable to the OTUCn/OTUCn-M signal types based on foundation
Path, directly transmit the second path establish request message give the second node equipment.
In said program, second receiving module, for directly receiving carrying that the second node equipment is sent the
The Secondary resource reserving message of two labels；Second label at least carries：Branch end number information, service layer's interface type,
Tag length information, time slot bit bitmap, unavailable number of time slot.
Using path establishment method provided in an embodiment of the present invention and device, first node equipment is based on service layer's path hair
First path is sent to establish request message；The first path establish request message for ask foundation it is complete with second node equipment room
The path of complete standardized optical transport unit-Cn signal types or OTUCn-M；The first resource for receiving the first label of carrying is reserved
Message, and established and the second node equipment room OTUCn/OTUCn-M signal types based on the first resource reserving message
Path；Wherein, first label at least carries branch end number information, service layer's interface type and tag length information；
The path of the OTUCn/OTUCn-M signal types based on foundation sends the second path and establishes request message；Second tunnel
Diameter establish request message for ask establish and second node equipment room light data unit-Cn (ODUCn, Optical Data
Unit-Cn) the path of signal type；The Secondary resource reserving message for carrying the second label is received, and is based on the Secondary resource
Reserving message establishes the path with the second node equipment room ODUCn signal types, to carry customer service；Wherein, described
The tag format of second label is identical as the tag format of the first label.So, it can be achieved that the fields super 100G OTN middle-end
To the foundation in the end paths OTUCn/ODUCn, and since branch end number information, service can be carried in the first label and the second label
Layer interface type and tag length information etc., therefore, it is possible to support to bind interface related configuration.
Description of the drawings
Fig. 1 is path establishment method flow diagram one in the embodiment of the present invention；
Fig. 2 is OTUCn application scenarios schematic diagrams in the embodiment of the present invention；
Fig. 3 is the tag format schematic diagram of the first label in the embodiment of the present invention；
Fig. 4 is label schematic diagram one in the embodiment of the present invention；
Fig. 5 is label schematic diagram two in the embodiment of the present invention；
Fig. 6 is path establishment method flow diagram two in the embodiment of the present invention；
Fig. 7 is OTUCn-M application scenarios schematic diagrams in the embodiment of the present invention；
Fig. 8 is label schematic diagram three in the embodiment of the present invention；
Fig. 9 is label schematic diagram four in the embodiment of the present invention；
Figure 10 is the composed structure schematic diagram that device is established in path in the embodiment of the present invention.
Specific implementation mode
Inventor has found in the course of the research, and in optical transport network, the multiplexing structure of OTUCn is：OTUCn regenerator sections
Layer, ODUCn multiplex sections layer, light data unit-k (ODUk, Optical Data Unit-k) layer；Wherein OTUCn and ODUCn are only
It is point-to-point connection, does not support the intersection based on ODUCn.
In practical applications, the rate of OTUCn signals may not also be 100G integral multiples, and this signal is commonly known as
OTUCn-M, i.e. Optical Transport Unit-Cn with n OxUC overhead instances and M 5G
Tributary slots, the OTUCn with n expense example and M 5G time slot, an OTUCn-M signal carry n OTUC
Head, the n head ODUC and the n head OPUC.When using OTUCn-M come when transmitting ODUCn, 20-M signal is marked
It is not available to know, these information are also carried on the multiplexing knot of light load unit (OPUCn, Optical Payload Unit)
In structure identifier (MSI, Multiplex Structure Identifier) field, which OTUCn-M time slot is assigned to that
OTUC is determined by operator or specific application.
G.709 described in standard, the intertexture on the heads OTU/ODU/OPU is present on the interface of OTUCn, but this interweaves
Journey is closely bound up with interface, and specific interface interleaving process is defined in G.709.x standard.G.709 defined in
OTUCn, ODUCn and OPUCn and specific interface are unrelated, and OTUCn, ODUCn and OPUCn are simply only divided into n
OTUC, ODUC and OPUC.For example, a kind of short-range flexible optical transport network interface is G.709.1 defined, by using
The flexible Ethernet interface that multiple bindings are got up transmits OTUCn signals, is in the source for supporting FlexO technologies specifically
OTUCn is decomposed into n OTUC example by node, and then one or more OTUC example is put on a FlexO interface
Transmission, the rate of FlexO interfaces can be the integral multiple of 100G, can be the interface of 200G, can also be the interface of 400G.
The paths FlexO are occurred as the form in service layer path in the present invention, and service layer path is used in embodiment, can be referred to
For the paths FlexO.
For the standard of the ITU-T super 100G OTN formulated, existing control plane technology, which is only capable of providing, divides time slot
Hair binds interface related configuration without supporting, can not be applied to the fields super 100G OTN.
A kind of path establishment method of offer of the embodiment of the present invention and device, first node equipment are based on service layer path and send
First path establishes request message,；The first path establish request message for ask establish and second node equipment room
The path of OTUCn/OTUCn-M signal types；The first resource reserving message for carrying the first label is received, and is based on described first
Resource reservation message establishes the path with the second node equipment room OTUCn/OTUCn-M signal types；Wherein, described first
Label at least carries branch end number information, service layer's interface type and tag length information；The OTUCn/ based on foundation
The path of OTUCn-M signal types sends the second path and establishes request message；Request message is established for asking in second path
Ask the path of foundation and second node equipment room ODUCn signal types；The Secondary resource reserving message for carrying the second label is received,
And the path with the second node equipment room ODUCn signal types is established based on the Secondary resource reserving message, with carrying
Customer service；Wherein, the tag format of second label is identical as the tag format of the first label.
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
Embodiment one
Fig. 1 is path establishment method flow diagram in the embodiment of the present invention, and the method is applied to ODUCn to OTUCn
In the scene of mapping, as shown in Fig. 2, the method is applied to first node equipment, as shown in Figure 1, Road of the embodiment of the present invention
Diameter method for building up includes：
Step 101：First node equipment is based on service layer's path transmission first path and establishes request message.
Here, the first path establish request message for ask establish and second node equipment room OTUCn class signals
The path of type.
In one embodiment, before this step, the method further includes：
Customer service request is received, and determines that the customer service needs the first segment based on customer service request
Point device is carried to the path of the ODUCn signal types of second node equipment room；Wherein, the customer service can be
ODUflex business；The bandwidth that the ODUflex business needs can be also obtained based on customer service request, such as：For 750G,
The bandwidth that ODUCn signals known to and then need, the corresponding 750G is 800G.And according to hierarchical relationship, it is set establishing node
Before the paths ODUCn of standby A to node device D, need first to establish the paths OTUCn between node device A to node device D,
Then node device A encapsulates OTUCn layers of signaling message, i.e. first path establishes request message, is established with request and is set with node
The path of OTUCn signal types between standby D.Wherein, it is established in request message in first path and indicates that establish one sets from node
The path of the OTUCn signal types of standby A to node device D, client signal ODUCn, centre are passed through equipment B and equipment C, are needed
Bandwidth be 800G, and carried by the FlexO circuits of 4 200G between each pair of node device；Here, between node device
Also the FlexO circuits of 2 400G or the FlexO circuits of 8 100G can be used, can specifically be determined according to real resource situation.
In practical applications, there are at least one intermediate nodes to set with second node equipment room for the first node equipment
It is standby, in the present embodiment, first node equipment, that is, node device A, second node equipment, that is, node device D, first node equipment
There are node device B, node device C with second node equipment room；
Correspondingly, described establish request message based on FlexO service layers path transmission first path, including：
Based on FlexO service layers path, through at least one intermediary device send first path establish request message to
The second node equipment.
It should be noted that since the foundation in FlexO service layers path belongs to existing procedure, implement in the present invention
In example, when the path of OTUCn signal types between establishing node device, acquiescence FlexO service layers path has had built up
Finish, every optical transfer network line signal may be carried by different interfaces, it is also possible to be carried by the same interface.Described
One path is established request message and is sent out from node device A, reaches node device D by node device B and node device C, on the way
Equipment does corresponding resource inspection, determines whether resource is available enough.
Step 102：The first resource reserving message for carrying the first label is received, and is based on the first resource reserving message
Establish the path with the second node equipment room OTUCn signal types.
Here, the first label at least carries branch end number information, service layer's interface type and tag length information；Its
In, service layer's interface type can be the Ethernet interface of 100G, 200G, 400G；In one embodiment, first mark
Label can also carry time slot bit bitmap, unavailable number of time slot and unavailable time slot bit bitmap etc.；Wherein, the branch end of carrying
Slogan TPN is the tributary port number for distributing to client signal；Service layer's interface type is for describing for OTUCn/ODUCn
The interface type of the flexible optical transfer network used can be the Ethernet interface of 100G/200G/400G；Length：For illustrating this
The length of label；Time slot bit bitmap (20) distributes to the time slot position of client；Unavailable number of time slot illustrates unavailable
The number of time slot；Unavailable time slot bit bitmap (20) illustrates the position of unavailable time slot.In the present embodiment, described first
The tag format of label is as shown in Figure 3.
Based on the above embodiment of the present invention, in practical applications, node device D is in receive that node device A sends the
After request message is established in one path, parse the request message, and according to local resource information, determine using the paths FlexO 1,
2,3,4 OTUCn signals are carried to bind jointly, and encapsulation resource reservation protocol _ Hop (RSVP_Hop, Resource
Reservation Protocol) object, to indicate, which four flexible optical transfer network path physical link to be used is,
Meanwhile branch end slogan, service layer's interface type using label/resource allocation information block identification to ODUflex traffic assignments
And tag length；In the present embodiment, including four labels, as shown in figure 4, tributary port number is set as 0, because at this time not
It needs to distribute to ODUflex client traffics and number；Flexible optical transfer network interface type setting is 200G, and 4 are used for illustrating
The flexible optical transfer network path of 200G carries OTUCn signals；Length field is set as 0, for illustrate this OTUCn be for
ODUCn signals are carried, is not related to the scene of fractional rate, is not also related to distributing specific time interval resource to client signal.Each
The interface resource that label/resource allocation information block is identified and RSVP_HOP objects are one-to-one.
Second node equipment is sent to certainly after completing the encapsulation of label and RSVP_Hop objects using resource reservation message
Upper hop the node device C, node device C of body complete local resource reservation based on the resource reservation message received first, so
Passage path calculates afterwards, determines that the resource between upper hop node need not use fractional rate scene, equally using in Fig. 4
Tag format/resource allocation information send resource reservation message to upper hop node device B；Node device B repeats above-mentioned
Operation sends first resource reserving message and node device A, node device A is given to complete local resource reservation, completes end to end
The path of OTUCn is established.In practical applications, when there are two or two with the second node equipment room for first node equipment
When the above intermediary device, intermediary device is based respectively on the resource reservation that the next-hop node equipment of itself is sent and disappears
Breath completes local resource reservation, and generates corresponding resource reservation message and be sent to the upper hop node device of itself, so that
First node equipment completes the foundation in path based on the resource reservation message that the next-hop node equipment of itself is sent.
Step 103：The path of the OTUCn signal types based on foundation sends the second path and establishes request message.
After first node equipment is established in the path for completing OTUCn, message continuation is established in the path of ODUCn layers of triggering,
Send the second path and establish request message and give second node equipment, second path establish request message for ask establish and
The path of second node equipment room ODUCn signal types；Here, since first node equipment and second node equipment has had been established
Between the path of OTUCn end to end therefore can directly transmit the second path and establish request message and give second node equipment.
In practical applications, first node equipment first has to encapsulate before sending the second path and establishing request message
Request message is established in the path of ODUCn layers of signaling message, i.e. ODUCn layer, i.e., request message is established in described second path, in institute
A first node equipment will be established to the path of the ODUCn signal types of second node equipment room to carry by stating instruction in message
The bandwidth of client traffic, ODUCn is 800G.And the encapsulation that request message is established to second path can both establish
After the path of OTUCn, it can also be encapsulated before the path for having established OTUCn.
Step 104：The Secondary resource reserving message for carrying the second label is received, and is based on the Secondary resource reserving message
The path with the second node equipment room ODUCn signal types is established, to carry customer service.
Here, the tag format of second label is identical as the tag format of the first label, and intermediate node is set
Label between standby also can be identical as the tag format of the first label.
In practical applications, second node equipment is disappeared after receiving second path and establishing request message based on this
Breath completes local resource reservation, and determines and bind carrying ODUCn signals, encapsulation jointly using the paths FlexO 1,2,3,4
RSVP_HOP objects for indicating which four path FlexO the physical link used is, and are given using the second tag identifier
Branch end slogan, service layer's interface type and the tag length of ODUflex traffic assignments；In the present embodiment, including four are marked
Label, as shown in figure 5, interface resource and RSVP_HOP objects that each label is identified are one-to-one.In the present embodiment,
Tributary port number is set as 5, illustrates that the tributary port number for distributing to client's ODUflex business is 5；Flexible optical transfer network connects
Mouth type setting is 200G, and ODUCn signals are carried for illustrating the flexible optical transfer network path using 4 200G；Length
Field is set as 8, and for illustrating that the length of each label/resource allocation information block is 8 bytes, this explanation of field is distributed to
Which the time slot of ODUflex client traffics has, wherein illustrating that this time slot is distributed to client and made using the bit that character 1 is filled
With 0 indicates to be not yet assigned to client's use.
Second node equipment is sent after the encapsulation for completing label/resource allocation information block using resource reservation message
Give first node equipment；First node equipment directly receives the Secondary resource reserving message of second node equipment transmission, parses institute
State Secondary resource reserving message, be based on second label and corresponding RSVP_HOP objects, complete local resource reservation it
Afterwards, the foundation in first node equipment and second node equipment room paths ODUCn end to end is completed.
Embodiment two
Fig. 6 is path establishment method flow diagram in the embodiment of the present invention, and the method is applied to ODUCn to part speed
In the scene of rate OTUCn-M mappings, as shown in fig. 7, the method is applied to first node equipment, as shown in fig. 6, the present invention is real
Applying path establishment method in example includes：
Step 601：First node equipment receives customer service request.
In the present embodiment, the customer service is ODUflex business, and the bandwidth that the ODUflex business needs is
600G。
Step 602：Based on service layer path, sends first path through at least one intermediary device and establish request message
Give second node equipment；First path establishes request message and carries fractional rate subobject.
In the present embodiment, it is node device A to enable first node equipment, and second node equipment is node device D, first segment
Point device to second node equipment room includes two intermediary devices, and respectively node device B and node device C, node are set
The standby bandwidth resources for having 600G between B and node device C are available, but these bandwidth resources are distributed in 4 paths 200G FlexO
On.The service layer path can be the paths FlexO.
After first node equipment parses the customer service request, determine that the ODUflex business needs the first segment
Point device is carried to the path of the ODUCn signal types of second node equipment room, and the bandwidth needed is 600G, and according to layer
Secondary relationship is needed first to establish node device A and is set to node before the paths ODUCn for establishing node device A to node device D
The paths OTUCn between standby D, it is contemplated that the available bandwidth resources between node device B and node device C are distributed in 4 200G
The paths FlexO on, determination is carried using the paths FlexO of 4 200G, and then node device A encapsulates OTUCn layers of signaling
Message, i.e. first path establish request message, and the path with second node equipment room OTUCn signal types is established for asking.
Wherein, one will be established from node device A to the OTUCn/ of node device D by establishing instruction in request message in first path
Equipment B and equipment C is passed through in the path of OTUCn-M signal types, client signal ODUCn, centre, and the bandwidth needed is 600G,
And carried by the FlexO circuits of 4 200G between each pair of node device, and the first path is established in request message
Explicit route object (ERO, Explicit Route Object), i.e. fractional rate subobject are carried, for carrying path computing
As a result, the rate and number of the FlexO interfaces that i.e. path needs occupy and the admissible unavailable number of time slot of maximum.
It should be noted that since the foundation in the paths FlexO belongs to existing procedure, in embodiments of the present invention,
When establishing the path of OTUCn/OTUCn-M signal types between node device, the paths acquiescence FlexO, which have built up, to be finished, often
Optical transfer network line signal may be carried by different interfaces, it is also possible to be carried by the same interface.First path is built
Vertical request message is sent out from node device A, reaches node device D by node device B and node device C, equipment does phase on the way
The resource inspection answered determines whether resource is available enough.
Step 603：The first resource reserving message for carrying the first label is received, and is based on the first resource reserving message
Establish the path with the second node equipment room OTUCn signal types.
Based on the above embodiment of the present invention, in practical applications, second node equipment is receiving first node equipment
After first path establishes request message, the part carried in request message is established according to local resource information and first path
Rate subobject information determines using flexible optical transfer network path 1,2,3,4 to bind carrying ODUCn signals jointly, by four
Into resource reservation message, which at least carries branch end slogan for label/resource allocation information block and RSVP_Hop object encapsulations
Information, service layer's interface type and tag length information；Wherein, branch end slogan is the branch end slogan for distributing to client signal
Code, service layer's interface type are used to describe service layer's interface type for using for OTUCn/ODUCn, can for 100G, 200G,
The Ethernet interface of 400G；Tag length is used to illustrate the length of the label；The RSVP_Hop objects, to be made to indicate
Which four flexible optical transfer network path physical link is；
Wherein, the tributary port number of label is set as 0, is compiled because need not be distributed at this time to ODUflex client traffics
Number；Flexible optical transfer network interface type setting is 200G, is held for illustrating the flexible optical transfer network path using 4 200G
Carry OTUCn signals；Length field is set as 0, for illustrating that this OTUCn is not to be related to part speed for carrying ODUCn signals
The scene of rate is not also related to distributing specific time interval resource to client signal.Node device D completes label/resource allocation information
After the encapsulation of block, upper hop node device C is sent to using resource reservation message.
After the resource reservation message that node device C parsing node device D (second node equipment) are sent, complete first local
Resource reservation, then passage path calculate, according to the information of locally available resource, determine between upper hop node device B
Resource need use fractional rate scene, then carry out local resource reservation and label distribution, as shown in figure 8, the label
In addition to carrying branch end number information, service layer's interface type and tag length information, time slot bit bitmap is also carried, can not
With number of time slot and unavailable time slot bit bitmap；Wherein, time slot bit bitmap is the time slot position for distributing to client signal, no
Available time slot number illustrates that the number of unavailable time slot, unavailable time slot bit bitmap illustrate the position of unavailable time slot.Node
Equipment C is by the Tag Packaging of distribution into being sent to the upper hop node device B of itself, node device B bases after resource reservation message
Between the local resource reservation of the resource reservation message completion that node device C is sent, realization node device B and node device C
The foundation in fractional rate path, the then operation of duplicate node equipment D send the first resource reserving message for carrying the first label
To first node equipment (node device A).
In the present embodiment, the tag format of label is identical between node device namely first label at least carries branch
Terminal number information, service layer's interface type and tag length information, the tag format of the first label are as shown in Figure 3.First segment
Point device parses the first resource reserving message and obtains the information that first label carries, and completes local resource reservation,
Realize the foundation with second node equipment room paths OTUCn end to end.
Step 604：The path of the OTUCn signal types based on foundation directly transmits the foundation request of the second path and disappears
It ceases and gives second node equipment.
After first node equipment is established in the path for completing OTUCn, message continuation is established in the path of ODUCn layers of triggering,
Send the second path and establish request message and give second node equipment, second path establish request message for ask establish and
The path of second node equipment room ODUCn signal types；Here, since first node equipment and second node equipment has had been established
Between the path of OTUCn end to end therefore can directly transmit the second path and establish request message and give second node equipment.
In practical applications, first node equipment first has to encapsulate before sending the second path and establishing request message
Request message is established in the path of ODUCn layers of signaling message, i.e. ODUCn layer, i.e., request message is established in described second path, in institute
A first node equipment will be established to the path of the ODUCn signal types of second node equipment room to carry by stating instruction in message
The bandwidth of client traffic, ODUCn is 600G.And the encapsulation that request message is established to second path can both establish
After the path of OTUCn, it can also be encapsulated before the path for having established OTUCn.
Step 605：The Secondary resource reserving message for the second label of carrying that second node equipment is sent is received, and is based on institute
State the path of Secondary resource reserving message foundation and second node equipment room ODUCn signal types.
Here, the tag format of second label is identical as the tag format of the first label, and intermediate node is set
Label between standby also can be identical as the tag format of the first label.
In practical applications, second node equipment is disappeared after receiving second path and establishing request message based on this
Breath completes local resource reservation, and determines and bind carrying ODUCn signals, encapsulation jointly using the paths FlexO 1,2,3,4
RSVP_HOP objects for indicating which four path FlexO the physical link used is, and are given using the second tag identifier
Branch end slogan, service layer's interface type, tag length, time slot bit bitmap, the unavailable time slot ratio of ODUflex traffic assignments
Special bitmap etc.；In the present embodiment, including four labels, as shown in figure 9, interface resource and RSVP_ that each label is identified
HOP objects are one-to-one.In the present embodiment, tributary port number is set as 5, illustrates to distribute to client's ODUflex industry
The tributary port number of business is 5；Flexible optical transfer network interface type setting is 200G, for illustrating the spirit using 4 200G
Optical transfer network path live to carry ODUCn signals；Length field is set as 8, for illustrating each label/resource allocation information block
Length be 8 bytes, which the time slot that this explanation of field distributes to ODUflex client traffics has, wherein being filled out using character 1
The bit filled illustrates that this time slot distributes to client's use, and 0 indicates to be not yet assigned to client's use.
Second node equipment is sent after the encapsulation for completing label/resource allocation information block using resource reservation message
Give first node equipment；First node equipment parses the Secondary resource reserving message, based on second label and accordingly
RSVP_HOP objects after completing local resource reservation, complete first node equipment and second node equipment room end to end
The foundation in the paths ODUCn carries user's ODUflex business using the paths ODUCn.
Embodiment three
Figure 10 is the composed structure schematic diagram that device is established in path in the embodiment of the present invention, and as shown in Figure 10, the present invention is real
It applies path in example and establishes device applied to first node equipment；Including：First sending module 11, the first receiving module 12, second
Sending module 13 and the second receiving module 14；
First sending module 11 establishes request message for being based on service layer's path transmission first path；Described
One path establishes request message and establishes the path with second node equipment room OTUCn/OTUCn-M signal types for asking；
First receiving module 12, for receiving the first resource reserving message for carrying the first label, and based on described
First resource reserving message establishes the path with the second node equipment room OTUCn/OTUCn-M signal types；Wherein, described
First label at least carries branch end number information, service layer's interface type and tag length information；
Second sending module 13, the path for the OTUCn/OTUCn-M signal types based on foundation are sent
Request message is established in second path；Second path establish request message for ask establish and second node equipment room
The path of ODUCn signal types；
Second receiving module 14, for receiving the Secondary resource reserving message for carrying the second label, and based on described
Secondary resource reserving message establishes the path with the second node equipment room ODUCn signal types, to carry customer service；Its
In, the tag format of second label is identical as the tag format of the first label.
In one embodiment, first receiving module 12 is additionally operable to receive customer service request, and is based on the user
Service request determines that the customer service needs the first node equipment to the ODUCn signal types of second node equipment room
Path carries.
In one embodiment, first sending module 11 is additionally operable to be based on service layer path, through at least one middle node
Point device sends first path and establishes request message to the second node equipment.
In one embodiment, first receiving module 12 is additionally operable to receive the next-hop section of the first node equipment
Point device completes the first resource reserving message sent after local resource reservation.
In one embodiment, second sending module 13 is additionally operable to the OTUCn/OTUCn-M signals based on foundation
The path of type directly transmits the second path and establishes request message to the second node equipment.
In one embodiment, second receiving module 14, for directly receiving taking for the second node equipment transmission
Secondary resource reserving message with the second label；Second label at least carries：Branch end number information, service layer interface class
Type, tag length information, time slot bit bitmap, unavailable number of time slot.
In one embodiment, first path establishes request message and carries ERO subobjects, i.e. fractional rate subobject；It is described
ERO subobjects carry：Service layer's interface number, service layer's interface rate and maximum unavailable number of time slot information；
It is pre- that at least one intermediary device is based respectively on the resource that the next-hop intermediary device of itself is sent
It stays the message to complete local resource reservation, and completes to build fractional rate path between the next-hop intermediary device of itself
It is vertical, and generate corresponding resource reservation message and be sent to the upper hop node device of itself；
Wherein, the resource reservation message between intermediary device carries recording routing object RRO；What the RRO was carried
Label includes position and the information of number of unavailable time slot.
In embodiments of the present invention, first sending module 11, the first receiving module 12, the second sending module 13 and
Two receiving modules 14 can be realized by the hardware (transmitter/receiver) in node device.
It need to be noted that be：Above is referred to the description that device is established in path, be with above method description it is similar, together
The advantageous effect of method describes, and does not repeat.It is thin that undisclosed technology in device embodiment is established for path of the present invention
Section, please refers to the description of the method for the present invention embodiment.
The above description is merely a specific embodiment, is not intended to limit the scope of protection of the present invention.
Claims (13)
1. a kind of path establishment method, which is characterized in that the method is applied to first node equipment, the method includes：
First path, which is sent, based on service layer path establishes request message；The first path establish request message for ask build
It is vertical with the completely standardized optical transport unit-Cn OTUCn signal types of second node equipment room or OTUCn-M signal types
Path；
The first resource reserving message for carrying the first label is received, and is established and described the based on the first resource reserving message
The path of OTUCn/OTUCn-M signal types between two node devices；Wherein, first label at least carries branch end slogan letter
Breath, service layer's interface type and tag length information；
The path of the OTUCn/OTUCn-M signal types based on foundation sends the second path and establishes request message；Described
Two paths establish request message and establish the road with second node equipment room light data unit-Cn ODUCn signal types for asking
Diameter；
The Secondary resource reserving message for carrying the second label is received, and is established and described the based on the Secondary resource reserving message
The path of ODUCn signal types between two node devices, to carry customer service；Wherein, the tag format of second label with
The tag format of first label is identical.
2. according to the method described in claim 1, disappearing it is characterized in that, sending first path based on service layer path and establishing request
Before breath, the method further includes：
Customer service request is received, and determines that the customer service needs the first node to set based on customer service request
The path of the ODUCn signal types of second node equipment room to the utmost carries.
3. method according to claim 1 or 2, which is characterized in that described to be built based on service layer's path transmission first path
Vertical request message, including：
Based on service layer path, sends first path through at least one intermediary device and establish request message to second section
Point device.
4. according to the method described in claim 3, it is characterized in that, the method further includes：
It is complete that at least one intermediary device is based respectively on the resource reservation message that the next-hop node equipment of itself is sent
At local resource reservation, and generates corresponding resource reservation message and be sent to the upper hop node device of itself；
Correspondingly, the first resource reserving message for receiving the first label of carrying, including：
The next-hop node equipment for receiving the first node equipment completes local resource reservation is sent later described first
Resource reservation message.
5. according to the method described in claim 1, it is characterized in that, the OTUCn/OTUCn-M signals based on foundation
The path of type sends the second path and establishes request message, including：
The path of the OTUCn/OTUCn-M signal types based on foundation, directly transmit the second path establish request message to
The second node equipment.
6. according to the method described in claim 5, it is characterized in that, the Secondary resource for receiving the second label of carrying is reserved and disappears
Breath, including：
Directly receive the Secondary resource reserving message for the second label of carrying that the second node equipment is sent；Second label
At least carry：Branch end number information, service layer's interface type, tag length information, time slot bit bitmap, unavailable timeslot number
Mesh.
7. according to the method described in claim 3, it is characterized in that, first path, which establishes request message, carries route display object
ERO subobjects；The ERO subobjects carry：Service layer's interface number, service layer's interface rate and maximum unavailable timeslot number
Mesh information；The method further includes：
At least one intermediary device is based respectively on the resource reservation that the next-hop intermediary device of itself is sent and disappears
Breath completes local resource reservation, and completes the foundation in the fractional rate path between the next-hop intermediary device of itself,
And it generates corresponding resource reservation message and is sent to the upper hop node device of itself；
Wherein, the resource reservation message between intermediary device carries recording routing object RRO；The label that the RRO is carried
Position including unavailable time slot and information of number.
8. device is established in a kind of path, which is characterized in that described device is applied to first node equipment；Described device includes：The
One sending module, the first receiving module, the second sending module and the second receiving module；
First sending module establishes request message for being based on service layer's path transmission first path；The first path
Request message is established for asking to establish the path with second node equipment room OTUCn signal types or OTUCn-M signal types；
First receiving module is provided for receiving the first resource reserving message for carrying the first label, and based on described first
Source reserving message establishes the path with the second node equipment room OTUCn/OTUCn-M signal types；Wherein, first mark
Label at least carry branch end number information, service layer's interface type and tag length information；
Second sending module, the path for the OTUCn/OTUCn-M signal types based on foundation send the second tunnel
Diameter establishes request message；Second path establish request message for ask establish and second node equipment room ODUCn signals
The path of type；
Second receiving module is provided for receiving the Secondary resource reserving message for carrying the second label, and based on described second
Source reserving message establishes the path with the second node equipment room ODUCn signal types, to carry customer service；Wherein, institute
The tag format for stating the second label is identical as the tag format of the first label.
9. device according to claim 8, which is characterized in that
First receiving module is additionally operable to receive customer service request, and determines the use based on customer service request
Family business needs the first node equipment to the path of the ODUCn signal types of second node equipment room to carry.
10. device according to claim 8 or claim 9, which is characterized in that
First sending module, is additionally operable to be based on service layer path, and first path is sent through at least one intermediary device
Request message is established to the second node equipment.
11. device according to claim 10, which is characterized in that
First receiving module, the next-hop node equipment for being additionally operable to receive the first node equipment complete local resource
The reserved first resource reserving message sent later.
12. device according to claim 8, which is characterized in that
Second sending module is additionally operable to the path of the OTUCn/OTUCn-M signal types based on foundation, directly transmits
Request message is established to the second node equipment in second path.
13. device according to claim 12, which is characterized in that
Second receiving module, the Secondary resource for directly receiving the second label of carrying that the second node equipment is sent
Reserving message；Second label at least carries：Branch end number information, service layer's interface type, tag length information, time slot
Bit map, unavailable number of time slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710114715.3A CN108513180A (en) | 2017-02-28 | 2017-02-28 | A kind of path establishment method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710114715.3A CN108513180A (en) | 2017-02-28 | 2017-02-28 | A kind of path establishment method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108513180A true CN108513180A (en) | 2018-09-07 |
Family
ID=63373306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710114715.3A Pending CN108513180A (en) | 2017-02-28 | 2017-02-28 | A kind of path establishment method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108513180A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020051851A1 (en) * | 2018-09-13 | 2020-03-19 | 华为技术有限公司 | Data transmission method and apparatus in optical transport network |
| WO2020108329A1 (en) * | 2018-11-30 | 2020-06-04 | 华为技术有限公司 | Service data processing method and device |
-
2017
- 2017-02-28 CN CN201710114715.3A patent/CN108513180A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020051851A1 (en) * | 2018-09-13 | 2020-03-19 | 华为技术有限公司 | Data transmission method and apparatus in optical transport network |
| WO2020108329A1 (en) * | 2018-11-30 | 2020-06-04 | 华为技术有限公司 | Service data processing method and device |
| CN111263250A (en) * | 2018-11-30 | 2020-06-09 | 华为技术有限公司 | Service data processing method and device |
| CN111263250B (en) * | 2018-11-30 | 2021-03-23 | 华为技术有限公司 | Service data processing method and device |
| US11611816B2 (en) | 2018-11-30 | 2023-03-21 | Huawei Technologies Co., Ltd. | Service data processing method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107204941A (en) | The method and apparatus that a kind of flexible Ethernet path is set up | |
| CN106803814B (en) | Method, device and system for establishing flexible Ethernet path | |
| ES2787048T3 (en) | Method, device and system for assigning a tributary port number | |
| CN103533464B (en) | Migrate method and the communication node of data | |
| CN101945307B (en) | Distribution treatment method of labels in optical network, optical communication device and optical communication system | |
| JP6784777B2 (en) | Service transmission method and first transmission device | |
| CN106716880B (en) | A kind of Packet Service is mapped to the method and OTN equipment of optical transport network | |
| CN106506110A (en) | Statistic multiplexing optical transfer network method and device | |
| ES2345059T3 (en) | METHOD, APPARATUS AND SYSTEM TO DISCOVER AUTOMATICALLY A CLIENT LINK LINK. | |
| CN102630384A (en) | Method of realizing service transport over optical transport network, device and system for implementing method thereof | |
| CN109936781B (en) | Data transmission method, equipment and system | |
| CN106803811A (en) | The acquisition methods and device of a kind of routing iinformation | |
| CN108513180A (en) | A kind of path establishment method and device | |
| CN104427412B (en) | A kind of method and device that bandwidth map updates | |
| KR101530561B1 (en) | Signaling control method and system for service establishment based on g.709 | |
| CN109039892A (en) | A kind of transmission method of business, the network equipment and network system | |
| JP6779285B2 (en) | How to send and receive signals, devices, and systems | |
| WO2017008634A1 (en) | Method of transmitting inter-domain interface data in optical transport network and device using same | |
| US20150358431A1 (en) | Enhanced data communications in an optical transport network | |
| CN109391370A (en) | Transmission rate adjusting method and the network equipment in a kind of optical transport network | |
| CN102624603B (en) | Obtain ODUflex and connect the method and device of required branch road timeslot number | |
| CN112653534B (en) | Time slot alignment method, device, equipment and computer readable storage medium | |
| KR20150113495A (en) | Method and apparatus for creating virtual traffic engineering link | |
| CN105792030B (en) | Method for realizing optical burst transport network service across rings and corresponding main node | |
| CN102932843A (en) | Information transmission method, PON (Passive Optical Network) bearer network equipment and information bearer network equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180907 |