CN102238439A - Control method and system of business mapping process based on G.709 - Google Patents
Control method and system of business mapping process based on G.709 Download PDFInfo
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Abstract
The invention provides a control method and system of business mapping process based on G.709, comprising the following steps that: before building an end-to-end business connection, source nodes and lodge nodes consult a business mapping process through calling; and the source nodes and the lodge nodes configure the consulted business mapping process after the consultation is finished. The invention further provides a control method for a business mapping process; and business mapping process information is carried in end-to-end business connection building signals so as to realize consulting of the business mapping process. The invention also provides a control system for a total business mapping process.
Description
Technical field
The present invention relates to belong to the optical-fiber network transmission field, relate in particular in a kind of optical transfer network ASON, based on the control method and the system of G.709 professional mapping process.
Background technology
Optical transfer network (OTN) is that (Time DivisionMultiplexing, TDM) the big capacity of signal transmitted problem and a kind of " digital wrapper " technology of proposing in order to solve high-speed time-division multiplex in 1999.The OTN of 2003 editions definition can provide functions such as transmission, multiplexing, protection and monitoring management for client layer signal; the client layer signal of being supported mainly is synchronous transfer module (STM-N), ATM(Asynchronous Transfer Mode) and passes through the ethernet signal that generic frame procedure (GFP) mapping is supported that the speed grade of its definition is 2.5G, 10G and 40G.Along with popularizing of IPization that transmits network carrying signal and 10G LAN interface, the carrying of ten thousand mbit ethernets (10GE) on OTN becomes a major issue, so ITU-T developed the G.sup43 standard in 2007, defined the mode of OTN transmission 10GE signal.
The digital multiplex hierarchy of tradition OTN is very simple, and speed grade is 2.5G, 10G and 40G, corresponding Optical Channel Data Unit-k ODU1, ODU2 and ODU3 respectively.Cbr (constant bit rate) (Constant Bit Rate, CBR) business adopts asynchronous mapping (Asynchronous Mapping Procedure, AMP) or bit synchronous mapping (Bit synchronous Mapping Procedure, BMP) mode is mapped to corresponding ODUk, the professional GFP mode that adopts of grouping (Packet) is mapped to ODUk, and these ODUk are mapped among the corresponding optical channel transmission unit OTUk again.Certainly, the ODU of low rate grade also reusable in the ODU of two-forty grade.
Present OTN standard will be supported multiple mapping method, mainly contain GFP mapping, BMP, AMP and GMP mapping.When being mapped to the OTN network at Ethernet service, there is diversified mapping process, can adopt respectively that mac frame is transparent, the PCS layer is transparent or mapping process such as bit is transparent, GFP can support the transparent or PCS layer transparent mapped of ethernet mac frame, and BMP, AMP and GMP then can support the bit transparent mapped.
The difference of bit synchronous mapping process (BMP) and asynchronous mapping process (AMP):
Mac frame transparent mapped process comprises interval, lead code and the SFD that removes between the bag, only the ethernet mac frame is mapped among the OTN by GFP-F (GFP frame, ITU-T are G.7041/Y.1303), owing to handle the MAC layer, the method can be adjusted bandwidth, and Ethernet is realized Flow Control.
PCS layer transparent mapped realizes by GFP-T, to Ethernet PCS layer bit stream recompile, but information such as transparent transmission lead code and SFD, but frame gap need be adjusted (if clock is the method for synchronization then does not need to adjust) according to tranmitting data register, and the method is transparent transmission Ethernet PCS layer bit stream at utmost.
The bit transparent mapped comprise with Ethernet client signal (all bits) as the CBR signal map in OTN, this require ethernet line speed (comprising PCS) must and the OTN container be complementary.The meaning of bit transparent mapped is:
1) have the privately owned utilization (leading character or IFG carry privately owned OAM) of Ethernet on the market, when this just required business to be mapped to OTN, the information of these privately owned utilizations can not be modified.
2) do not change any client signal information.
3) use the L2 coded signal to come the ethernet signal of alternate standard, do not allowed to use frame to be mapped to the mode that transmits container.
4) synchronous Ethernet, clock synchronization information must be by transparent transmission in the OTN network.
5) error performance of client signal monitors, when this just required business to be mapped to OTN, the information that these error performances monitor can not be modified.
For Fast Ethernet, can be according to real needs, adopt respectively that the MAC layer is transparent, the PCS layer is transparent or mapping process such as bit is transparent.
The container of carrying 40GbE client signal is ODU3, and the container of carrying 100GbE client signal is ODU4.The 40/100GbE client signal at first needs to shine upon Payload Unit OPU3 and the OPU4 that enters ODU3 and ODU4, transmits on optical fiber by ODU layer, OTU layer, OCh layer, OMS layer and OTS layer successively then.
40GbE ethernet signal and 100GbE ethernet signal map to OPU3 and OPU4 is the key of OTN carrying, carries out standard in the part up-to-date augmenting G.709 at present.IEEE P802.3ba is that 40GbE and 100GbE have defined parallel Virtual Channel (Virtual Lane) and corresponding parallel physical interface, the 40GbE signal is made up of 4 Virtual Channels, the 100GbE signal is made up of 20 Virtual Channels, and the PCS sublayer all is based on the 64B/66B coding.
40GbE speed is 41.25Gbit/s, and OPU3 speed is 40.15Gbit/s, can't directly shine upon.Therefore the 40GbE parallel interface is converted to after the serial bit stream, needs to adopt the method for code conversion to carry out the speed compression, last asynchronous mapping enters OPU3.Therefore, 40GbE realization at present is PCS layer transparent mapped.
Because OPU4 is the message structure according to the 100GbE redetermination, speed is 104.355Gbit/s, and the 100GbE line speed is 103.125Gbit/s.Therefore 100GbE directly asynchronous mapping enter OPU4, realize bit transparent mapped completely.
Therefore, identical mapping process must be adopted in professional two ends, otherwise business can't correctly be sent and receive at two ends.Can at every business by network management configuration to datum plane, but such configuration effort is very loaded down with trivial details, time-consuming and occur the situation of mispairing easily.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of control method and system of professional mapping process, reduces setup time and configuration effort amount, reduces OTN network O﹠M cost.
In order to address the above problem, the invention provides a kind of control method of professional mapping process, comprising: before teleservice connected foundation, source node and destination node were by the professional mapping process of call negotiation; After negotiation finishes, the professional mapping process that described source node and destination node configuring negotiation are good.
Wherein, described source node and destination node comprise by the step of the professional mapping process of call negotiation:
Source node makes a call to set up to destination node and asks, and carries the professional mapping process that source node is supported in described call setup request message;
When described destination node is received call setup request message, professional mapping process according to source node support in the described call setup request message, for the teleservice of creating connects, a kind of professional mapping process of selecting source node and destination node all to support, return call answering message and give described source node, carry the selected professional mapping process of described destination node in the described call answering message;
Described source node receives described call answering message, obtains the selected professional mapping process of described destination node from described call answering message, and the selected professional mapping process of described destination node is the described professional mapping process that consults.
Wherein, the step of the professional mapping process that described source node and destination node configuring negotiation are good comprises:
Described source node is initiated end-to-end connection and is set up signaling procedure, carries the described professional mapping process that consults in PATH;
After destination node is received described PATH, the described professional mapping process that carries in the described PATH is configured to datum plane, and returns reservation message;
After described source node is received described reservation message, the described professional mapping process that consults is configured to datum plane.
The present invention also provides a kind of control method of professional mapping process, comprising:
Source node is initiated end-to-end connection and is set up signaling procedure, carries the professional mapping process of its support in PATH;
When destination node is received described PATH, professional mapping process according to the source node support of carrying in the described PATH, for the teleservice of creating connects, a kind of professional mapping process of selecting source node and destination node all to support, selected professional mapping process is configured to datum plane, return reservation message and give source node, carry the selected professional mapping process of described destination node in the described reservation message;
After described source node is received described reservation message, the described professional mapping process that carries in the described reservation message is configured to datum plane.
Wherein, when described destination node was received described PATH, if find the professional mapping process that do not have described source node and described destination node all to support, then the return path error message was given described source node.
Wherein, the mapping process configuration subtype length value object of expanding in the label switched path attribute of described source node by described PATH carries the professional mapping process that described source node is supported, comprise type field, length field and professional mapping process information field in the described mapping process configuration subtype length value object, wherein:
Described type field is indicated the type of described object;
The length of described length field indicating services mapping process information field;
Use several bits to carry professional mapping process information in the described professional mapping process information field, each bit indicates whether to support a kind of specific professional mapping process.
The present invention also provides a kind of control system of professional mapping process, comprises source node and destination node, wherein:
Described source node is used for before teleservice connect to be set up, with described destination node by the professional mapping process of call negotiation, and, after negotiation finishes, the professional mapping process that configuring negotiation is good;
Described destination node is used for before teleservice connect to be set up, with described source node by the professional mapping process of call negotiation, and, after negotiation finishes, the professional mapping process that configuring negotiation is good.
Wherein, described source node is to be used for: make a call to set up to destination node and ask, carry the professional mapping process that source node is supported in described call setup request message; And receive the call answering message that described destination node returns, from described call answering message, obtain the selected professional mapping process of described destination node; The described professional mapping process that described destination node is selected is the described professional mapping process that consults;
Described destination node is to be used for: the call setup request message that the reception sources node sends, professional mapping process according to source node support in the described call setup request message, for the teleservice of creating connects, a kind of professional mapping process of selecting source node and destination node all to support, return call answering message and give source node, carry the selected professional mapping process of destination node in the described call answering message.
Wherein, described source node is to be used for, and after negotiation finishes, initiates end-to-end connection and sets up signaling procedure, carries the described professional mapping process that consults in PATH; And, when receiving the reservation message that described destination node returns, the described professional mapping process that consults is configured to datum plane;
Described destination node is to be used for, and receives described PATH, and the described professional mapping process that consults that carries in the described PATH is configured to datum plane, and returns reservation message and give described source node.
The present invention also provides a kind of control system of professional mapping process, comprises source node and destination node, wherein:
Described source node is used for: initiate end-to-end connection and set up signaling procedure, carry the professional mapping process of its support in PATH; And, receive the reservation message that described destination node returns, the professional mapping process that carries in the described reservation message is configured to datum plane;
Described destination node is used for: receive the described PATH that described source node sends, professional mapping process according to the source node support of carrying in the described PATH, for the teleservice of creating connects, a kind of professional mapping process of selecting described source node and destination node all to support, selected professional mapping process is configured to datum plane, return reservation message and give source node, carry the selected professional mapping process of destination node in the described reservation message.
Wherein, when described destination node also was used to receive described PATH, if find the professional mapping process that do not have source node and destination node all to support, then the return path error message was given described source node.
Wherein, described source node, be to be used for disposing sub-time length value object to carry the professional mapping process that described source node is supported by the mapping process that the label switched path attribute of described signaling message is expanded, comprise type field, length field and professional mapping process information field in the described mapping process configuration subtype length value object, wherein:
Described type field is indicated the type of described object;
The length of described length field indicating services mapping process information field;
Use several bits to carry professional mapping process information in the described professional mapping process information field, each bit indicates whether to support a kind of specific professional mapping process.
The control method and the system of the professional mapping process that the present invention proposes, can automatically consult the mapping process of teleservice at professional two ends, and automatically the mapping process that consults is configured to datum plane, improve the configuration correctness, reduce setup time and configuration effort amount, reduce OTN network O﹠M cost.
Description of drawings
Fig. 1 is the LSP_ATTRIBUTES Format Object of RFC5420 definition;
Fig. 2 is the RRO Attributes Subobject Format Object of RFC5420 definition;
Fig. 3 is the form after the present invention expands the LSP_ATTRIBUTES object, and object naming is Mapping Procedure Set sub-TLV;
Fig. 4 is the embodiment of the invention 2 pairing Signalling exchange flow processs;
Fig. 5 is in the Signalling exchange flow process, and source node is mailing in the Path message of destination node, entrained professional mapping process information;
Fig. 6 is in the Signalling exchange flow process, and destination node mails in the Resv message of source node, entrained professional mapping process information;
Fig. 7 is the embodiment of the invention 3 pairing Signalling exchange flow processs;
Fig. 8 is in the Signalling exchange flow process, and source node is mailing in the Path message of destination node, entrained professional mapping process information.
Embodiment
When different types of service is mapped to different OPUk or ODUk, need to adopt different mapping process, comprising:
When the client signal of constant bit-rate 2.5G, 10G, 40.1G and 101.3G is mapped to OPU1, OPU2, OPU3 and OPU4, transparent decoding in use (TTT-TimingTransparent Transcoding), the compression of client signal speed with before being fit to OPUk speed, is used GMP (Generic Mapping Procedure) mapping process.
Grouping client signal (Ethernet, MPLS and IP) uses GFP-F (Generic FramingProcedure frame) to be mapped among the OPUk.
With constant bit-rate 2.5G (for example STM-16), 10G (for example STM-64), when 40G (for example STM-256) is mapped to OPUk (k=1,2,3), bit rate tolerance limit (bit-ratetolerance) difference according to signal, adopt different mapping process:
The bit rate tolerance limit of ± 45ppm adopts asynchronous mapping process (AMP);
With constant bit-rate 10.3G (for example 10GBASE-R, just 10GE Ethernet) signal (the bit rate tolerance limit for ± when 100ppm) being mapped to OPU2e, use the bit synchronous mapping process.When shining upon other constant bit-rate signals (± 100ppm bit rate tolerance limit) to OPUk (k=0,1,2,3,4), (GMP) finishes by general mapping process.
To comprise when Transcoded 1000BASE-SX, STM-1, STM-4 and FC-100 are mapped to OPU0 less than the constant bit-rate client signal of 1.238G, use GMP.
Will be greater than 1.238G when being mapped to OPU1, use the GMP mapping mode less than the constant bit-rate client signal (FC200) of 2.488G.
In the time of will being mapped to OPU2, OPU3 and OPU4 respectively near the constant bit-rate client signal of 9.995G, 40.149G and 104.134, use the GMP mapping process.
(during 10518750kbit/s ± 100ppm), because speed greater than OPU2e, must be compressed, adopt the GFP-F encapsulation, the mapping process of GFP-F aligns with the byte structure of OPUk payload by the byte structure with each gfp frame and carries out with FC-1200.Because variable length during gfp frame that is to say mapping to maximum frame size without limits, so gfp frame might surpass the border of OPUk frame.Owing in the GFP dress stage, inserted the Idle frame, therefore the capacity of the gfp frame that arrives with the successive bits stream mode equals the OPUk payload area.At encapsulated phase, gfp frame will be disturbed in encapsulation process.
To when being mapped to OPUflex, finish greater than the constant bit-rate client signal (± 100ppm bit rate tolerance limit) of 2.488G by BMP.
The constant bit-rate signal (STM-64/256) of general ± 20ppm bit rate tolerance limit can adopt asynchronous and the bit synchronous mapping process when being mapped to OPUk-4v.At Virtual Concatenation OPUk-4v, when using the asynchronous mapping process, the clock of OPUk-4v derives from the local clock that produces, and is independent of constant bit-rate client signal (4
(k)* 2488320kbit/), when client signal is mapped to OPUk-4v, just using/the negative justification pattern.When using bit asynchronous mapping process, the OPUk-4v clock derives from constant bit-rate client signal (4
(k)* 2488320kbit/), when client signal is mapped to OPUk-4v, just need not to use/the negative justification pattern, the constant bit-rate signal more synchronously the time, be need not pull-in frequency and FramePhase Discontinuity.
The constant bit-rate signal (STM-256) of general ± 20ppm bit rate tolerance limit can adopt asynchronous and the bit synchronous mapping process when being mapped to OPUk-16v.At Virtual Concatenation OPUk-16v, when using the asynchronous mapping process, the clock of OPUk-16v derives from the local clock that produces, and is independent of constant bit-rate client signal (4
(k+1)* 2488 320kbit/), when client signal is mapped to OPUk-16v, just using/the negative justification pattern.When using bit asynchronous mapping process, the OPUk-16v clock derives from constant bit-rate client signal (4
(k+1)* 2488 320kbit/), when client signal is mapped to OPUk-4v, just need not to use/the negative justification pattern, the constant bit-rate signal more synchronously the time, need not pull-in frequency and Frame Phase Discontinuity.
Adopt the GFP-F encapsulation, the mapping process of GFP-F aligns with the byte structure of OPUk-Xv payload by the byte structure with each gfp frame and carries out.Because variable length during gfp frame that is to say mapping to maximum frame size without limits, so gfp frame might surpass the border of OPUk frame.Owing in the GFP dress stage, inserted the Idle frame, therefore the capacity of the gfp frame that arrives with the successive bits stream mode equals the OPUk payload area.At encapsulated phase, gfp frame will be disturbed in encapsulation process.
ODU0 is mapped to OPU1, and ODU1 is mapped to OPU2, and ODU1 and ODU2 are mapped to OPU3, uses asynchronous mapping process (AMP); Other ODUj are multiplexed into high-order OPUk and use GMP, carry out ODUj by following two steps and are multiplexed into high-order OPUk.
With ODUj (j=0,1,2,2e, 3, flex) signal (± 100 bit rate tolerance limit) is mapped to ODTUk.ts (k=2,3,4; Ts=M) time, use GMP.
In sum, when different types of service is mapped to different OPUk or ODUk, need to adopt different mapping process, as follows:
BMP: with CBR2G5, CBR10G or CBR40G (± 20ppm bit-rate tolerance, promptly ± 20ppm bit rate tolerance) is mapped to OPUk (k=1,2,3);
AMP: with CBR2G5, CBR10G or CBR40G (± 45ppm bit-rate tolerance) is mapped to OPUk (k=1,2,3);
GMP: CBR (± 100ppm bit-rate tolerance) is mapped to OPUk (k=0,1,2,3,4);
AMP: the CBR signal (for example, STM-64/256) is mapped to OPUk-4v;
GMP: the CBR signal (for example, STM-64/256) is mapped to OPUk-4v
AMP: the CBR signal (for example, STM-256) is mapped to OPUk-16v
GMP: the CBR signal (for example, STM-256) is mapped to OPUk-16v
GFP-F: gfp frame is mapped to OPUk-Xv
AMP: with ODUj (± 20ppm bit-rate tolerance) be mapped to ODTUjk ((j, k)={ (0,1), (1,2), (1,3), (2,3) }
GMP: with ODUj (j=0,1,2,2e, 3, flex) (± 100ppm) be mapped to ODTUk.ts (k=2,3,4; Ts=M)
BMP: CBR10G3 (± 100ppm bit-rate tolerance) is mapped to OPU2e
GFP-F: (10518750kbit/s ± 100ppm) signal map arrives OPU2e with FC-1200
GMP+GFP-T: (1250000kbit/s ± 100ppm) is mapped to OPU0 with the Transcoded 1000BASE-SX
GMP: Sub-1.238Gbit/s CBR (e.g., STM-1, STM-4and FC-100) client signal is mapped to OPU0
GMP: (e.g FC200) is mapped to OPU1 with Supra-1.238 to Sub-2.488Gbit/s CBR client signal
GMP: the about 9.995G CBR of bit rate client signal is mapped to OPU2
BMP: supra-2.488CBR Gbit/s signal map is arrived OPUflex
Therefore, at an end-to-end ODUk business (such as the ODU2 business), when will be at the two ends of business the constant bit-rate business of CBR10G being mapped to OPU2, can adopt BMP, AMP, perhaps GMP.If different mapping process is adopted at two ends, business just can't correctly be transmitted at the end-to-end path of ODU2.
The present invention proposes a kind of control method of professional mapping process, comprising:
Before teleservice connect to be set up, source node and destination node be by the professional mapping process of call negotiation, after negotiation finishes, and the professional mapping process that described source node and destination node configuring negotiation are good.
Wherein, source node and destination node comprise by the step of the professional mapping process of call negotiation:
Step S101, source node make a call to set up to destination node and ask, and carry the professional mapping process that source node is supported in described call setup request message;
Step S102, when the call request message of the professional mapping process that has carried the source node support arrives destination node, at the teleservice type that will create, professional mapping process according to source node support in the described call setup request message, destination node judges whether the professional mapping process of supporting that source node is supported, and the mapping process of supporting according to destination node, for the end-to-end ODUk that is creating connects, in all professional mapping process that source node and destination node are supported, a kind of professional mapping process of selecting both sides all to support;
Wherein, if exist the multiple business mapping process simultaneously by source and destination node support, how to select a kind of professional mapping process be the local behavior of destination node to destination node so.
Step S103, destination node return call answering message and give source node, carry the selected professional mapping process of destination node in the described call answering message; If the professional mapping process that does not have source node and destination node all to support then returns indication information, indication can't match the professional mapping process that both sides support;
Step S104, when the call answering message of having carried the selected professional mapping process of destination node arrives source node, source node is noted the selected professional mapping process of the destination node that carries in the described call answering message, as the professional mapping process that consults.
Wherein, the step of the professional mapping process that described source node and destination node configuring negotiation are good comprises:
Step S201, call negotiation finishes, and source node is initiated end-to-end connection and is set up signaling procedure, and in the message of path (Path), carries the professional mapping process that has consulted;
After step S202, destination node receive Path message, directly the professional mapping process that carries in the described Path message is configured on the datum plane, and upstream nodes is returned reservation (Resv) message;
Step S203 after source node receives reservation (Resv) message, is configured to the described professional mapping process that consults on the datum plane.
Wherein, can carry the professional mapping process that source node is supported by the mode that in message related to calls, adds attribute type length value (Attributes TLV) object, comprise type field, length field and reserved field in the attribute type length value object, the professional mapping process information that the portability source node is supported in the reserved field.Certainly, can carry the professional mapping process that source node is supported by other modes in the message related to calls, the present invention does not limit this yet.
In another embodiment of the present invention, also can not use the call negotiation process to come the consultation business service mapping process, directly connect and set up signaling consultation business service mapping process by teleservice.The present invention also provides a kind of control method of professional mapping process, comprising:
When source node is set up the teleservice connection at control plane by the distributed signaling mode, in PATH, carry the professional mapping process of its support;
When path (Path) message of the professional mapping process that has carried the source node support arrives destination node, at the teleservice type that will create, according to the professional mapping process that the source node that carries in the described PATH is supported, destination node need judge whether the professional mapping process of supporting that source node is supported; And the professional mapping process of supporting according to destination node is that the teleservice of creating connects, in all professional mapping process that source node and destination node are supported, and a kind of professional mapping process of selecting both sides all to support; And should be configured on the datum plane of destination node by the business mapping process,
Wherein, if exist the multiple business mapping process simultaneously by source and destination node support, how to select a kind of professional mapping process be the local behavior of destination node to destination node so.
Destination node returns reservation (Resv) message and gives source node, carries the selected professional mapping process of destination node in the described Resv message;
When reservation (Resv) message of having carried the selected professional mapping process of destination node arrived source node, source node was configured to the selected professional mapping process of the destination node that carries in the described Resv message on the datum plane of source node.
Wherein, when described destination node was received described PATH, if find the professional mapping process that do not have described source node and described destination node all to support, then return path mistake (PathErr) message was given described source node.
Wherein, the mapping process configuration subtype length value object of expanding in the label switched path attribute of described source node by described PATH carries the professional mapping process that described source node is supported, comprise type field, length field and professional mapping process information field in the described mapping process configuration subtype length value object, wherein:
Described type field is indicated the type of described object;
The length of described length field indicating services mapping process information field;
Use several bits to carry professional mapping process information in the described professional mapping process information field, each bit indicates whether to support a kind of specific professional mapping process.
Further specify the present invention below in conjunction with the drawings and specific embodiments.
According to RFC5420, when label switched path (LSP) attribute must can only work at destination node, the attribute of label switched path must be coordinated (Format Object as shown in Figure 1) by LSP_ATTRIBUTES (label switched path attribute) object so; When the intermediate node on the label switched path can't be discerned this object, must continue transmitting signaling message, so just can guarantee that the attribute of label switched path can arrive destination node.And source node need know whether the attribute of label switched path correctly plays effect at destination node, and then source node can require destination node report executing result in the LSP_ATTRIBUTES attribute; After destination node is carried out, use the Attributes subobject of RRO object to report whether it works to the attribute that receives.If destination node receives this attribute, and this attribute mandatory requirement is when destination node is carried out, if destination node does not want to satisfy the request of this attribute, it will refuse this Path message.
The present invention expands the LSP_ATTRIBUTES object of RFC5420, carries the professional mapping process that source node is supported; Expand RRO Attributes subobject simultaneously, carry the selected professional mapping process of destination node.
The control method of professional mapping process provided by the invention comprises:
The LSP_ATTRIBUTES object of expansion RFC5420, increase a kind of type lengths values (Type Length Value of newtype, TLV), the called after mapping process disposes sub-TLV (MappingProcedure Set sub-TLV), is carried in the LSP_ATTRIBUTES object of Path message.As shown in Figure 3, mapping process disposes sub-TLV and comprises type (Type) field, length (Length) field and professional mapping process information field, and described type field is indicated the type of described object, and its value can be decided as required; The length of described length field indicating services mapping process information field; Use several bits to carry professional mapping process information in the described professional mapping process information field, each bit indicates whether to support a kind of specific professional mapping process, among Fig. 3, the professional mapping process that uses bit B, A, G, F and T indication source node to support, the implication of each bit is as follows:
The B bit: if this bit assignment is 1, the indication source node is supported bit synchronous mapping process (BMP); If this bit assignment is 0, the indication source node is not supported bit synchronous mapping process (BMP).
The A bit: if this bit assignment is 1, the indication source node is supported asynchronous mapping process (AMP); If this bit assignment is 0, the indication source node is not supported asynchronous mapping process (AMP).
The G bit: if this bit assignment is 1, the indication source node is supported general mapping process (GMP); If this bit assignment is 0, the indication source node is not supported general mapping process (GMP).
The F bit: if this bit assignment is 1, the indication source node is supported general frame forming process (GFP-F); If this bit assignment is 0, the indication source node is not supported general frame forming process (GFP-F).
The T bit: if this bit assignment is 1, the general frame forming process (GFP-T) of indication source node tenaculum time transparency decoding; If this bit assignment is 0, the indication source node is the general frame forming process (GFP-T) of tenaculum time transparency decoding not.
A plurality of bit combination expression source nodes are supported the multiple business mapping process.Such as, if B, A, G, F, T are set to 11100, the expression source node is supported BMP, AMP and the professional mapping process of GMP.
The value of above-mentioned each bit (B/A/G/F/T), also can use value is to express support for the corresponding business mapping process at 0 o'clock, and value is to represent not support the corresponding business mapping process at 1 o'clock, and the present invention does not limit this.
Above-mentioned method of carrying the professional mapping process of source node support in Path message only is example, and the present invention does not limit this, and other method for expressing also can use.
Use defined newtype TLV, be carried in the LSP_ATTRIBUTES object of reservation (Resv) message, after indication destination node process is consulted with source node, the professional mapping process of being supported.Such as, if B, A, G, F, T are set to 00011, the expression source node is supported GFP-T and the professional mapping process of GFP-F.
Consult to select professional mapping process in order to solve source node and destination node, the present invention provides following embodiment.Mail to the TLV (as shown in Figure 3) that increases a newtype in the LSP_ATTRIBUTES object in the destination node Path message at source node, the professional mapping process of source node support is notified to destination node on the optical channel.After destination node receives the Path message of the professional mapping process that carries described source node support, the mapping process of supporting according to destination node, for the end-to-end ODUk that is creating connects, in all professional mapping process that source node and destination node are supported, a kind of professional mapping process of selecting both sides all to support, and should be configured on the datum plane of destination node by the business mapping process.Return in destination node reservation (Resv) message of source node, carry the selected professional mapping process of destination node.
As shown in Figure 4, source node is at CBR2G5, and CBR10G or CBR40G business is supported AMP, BMP and GMP mapping mode, and destination node is at CBR2G5, and CBR10G or CBR40G business is only supported the AMP mapping mode, and it is as follows that professional mapping process is consulted flow process:
401, source node is when creating the connection of ODU1, ODU2 or ODU3, LSP_ATTRIBUTES object in Path message indicates it at creating the professional mapping process that end-to-end ODUk institute loaded service is supported, promptly carry the expression source node and support AMP, BMP and the professional mapping process of GMP, a kind ofly carry mode as shown in Figure 5, B, A, G, F, T are set to 11100;
402, after destination node receives Path message, if indicated the professional mapping process that source node is supported in the LSP ATTRIBUTES object, check the professional mapping process that destination node this locality is supported, because destination node is at CBR2G5, CBR10G or CBR40G business is only supported the AMP mapping mode.Therefore, destination node connects for the end-to-end ODUk that is creating, in all professional mapping process that source node and destination node are supported, and a kind of professional mapping process of selecting both sides all to support, AMP just, and should be configured on the datum plane of destination node by the business mapping process.
403, destination node is returning in the Resv message of upstream node, by the LSP_ATTRIBUTES in the subobject of record destination node among the RRO, carry the selected professional mapping process of destination node, AMP just a kind ofly carries mode as shown in Figure 6, and B, A, G, F, T are set to 01000;
404, when reservation (Resv) message of having carried the selected professional mapping process of destination node arrived source node, the professional mapping process that source node has been determined the destination node that carries in this Resv message was configured on the source node data plane.
As shown in Figure 7, source node is at CBR2G5, and CBR10G or CBR40G business is only supported the GMP mapping mode, and destination node is at CBR2G5, and CBR10G or CBR40G business is only supported the AMP mapping mode, and professional mapping process control flow is as follows:
701, source node is when creating the connection of ODU1, ODU2 or ODU3, LSP_ATTRIBUTES object in Path message indicates it at creating the professional mapping process that end-to-end ODUk institute loaded service is supported, promptly carry the expression source node and only support the professional mapping process of GMP, a kind ofly carry mode as shown in Figure 8, B, A, G, F, T are set to 00100;
702, after destination node receives Path message, if indicated the professional mapping process that source node is supported in the LSP_ATTRIBUTES object, check the professional mapping process that destination node this locality is supported, because destination node is at CBR2G5, CBR10G or CBR40G business is only supported the AMP mapping mode.Therefore, destination node can't connect for the end-to-end ODUk that is creating, in all professional mapping process that source node and destination node are supported, a kind of professional mapping process of selecting both sides all to support, so destination node upstream returns PathErr message, and carry " routing error/mapping process (Routingproblem/Mapping Procedure) " information.
703, when the PathErr message of having carried error message that destination node sends arrives source node, source node will feed back the service creation failure to the client.
The present invention also provides a kind of control system of professional mapping process, comprises source node and destination node, wherein:
Described source node is used for before teleservice connect to be set up, with described destination node by the professional mapping process of call negotiation, and, after negotiation finishes, the professional mapping process that configuring negotiation is good;
Described destination node is used for before teleservice connect to be set up, with described source node by the professional mapping process of call negotiation, and, after negotiation finishes, the professional mapping process that configuring negotiation is good.
Wherein, described source node is to be used for: make a call to set up to destination node and ask, carry the professional mapping process that source node is supported in described call setup request message; And receive the call answering message that described destination node returns, from described call answering message, obtain the selected professional mapping process of described destination node; The described professional mapping process that described destination node is selected is the described professional mapping process that consults;
Described destination node is to be used for: the call setup request message that the reception sources node sends, professional mapping process according to source node support in the described call setup request message, for the teleservice of creating connects, a kind of professional mapping process of selecting source node and destination node all to support, return call answering message and give source node, carry the selected professional mapping process of destination node in the described call answering message.
Wherein, described source node is to be used for, and after negotiation finishes, initiates end-to-end connection and sets up signaling procedure, carries the described professional mapping process that consults in PATH; And, when receiving the reservation message that described destination node returns, the described professional mapping process that consults is configured to datum plane;
Described destination node is to be used for, and receives described PATH, and the described professional mapping process that consults that carries in the described PATH is configured to datum plane, and returns reservation message and give described source node.
The present invention also provides a kind of control system of professional mapping process, comprises source node and destination node, wherein:
Described source node is used for: initiate end-to-end connection and set up signaling procedure, carry the professional mapping process of its support in PATH; And, receive the reservation message that described destination node returns, the professional mapping process that carries in the described reservation message is configured to datum plane;
Described destination node is used for: receive the described PATH that described source node sends, professional mapping process according to the source node support of carrying in the described PATH, for the teleservice of creating connects, a kind of professional mapping process of selecting described source node and destination node all to support, selected professional mapping process is configured to datum plane, return reservation message and give source node, carry the selected professional mapping process of destination node in the described reservation message.
Wherein, when described destination node also was used to receive described PATH, if find the professional mapping process that do not have source node and destination node all to support, then the return path error message was given described source node.
Wherein, described source node, be used for disposing sub-time length value object and carry the professional mapping process that described source node is supported by the mapping process that the label switched path attribute of described signaling message is expanded, comprise type field, length field and professional mapping process information field in the described mapping process configuration subtype length value object, wherein:
Described type field is indicated the type of described object;
The length of described length field indicating services mapping process information field;
Use several bits to carry professional mapping process information in the described professional mapping process information field, each bit indicates whether to support a kind of specific professional mapping process.
Claims (12)
1. the control method of a professional mapping process comprises:
Before teleservice connected foundation, source node and destination node were by the professional mapping process of call negotiation; After negotiation finishes, the professional mapping process that described source node and destination node configuring negotiation are good.
2. the method for claim 1 is characterized in that, described source node and destination node comprise by the step of the professional mapping process of call negotiation:
Source node makes a call to set up to destination node and asks, and carries the professional mapping process that source node is supported in described call setup request message;
When described destination node is received call setup request message, professional mapping process according to source node support in the described call setup request message, for the teleservice of creating connects, a kind of professional mapping process of selecting source node and destination node all to support, return call answering message and give described source node, carry the selected professional mapping process of described destination node in the described call answering message;
Described source node receives described call answering message, obtains the selected professional mapping process of described destination node from described call answering message, and the selected professional mapping process of described destination node is the described professional mapping process that consults.
3. as claim 1,2 or 3 described methods, it is characterized in that the step of the professional mapping process that described source node and destination node configuring negotiation are good comprises:
Described source node is initiated end-to-end connection and is set up signaling procedure, carries the described professional mapping process that consults in PATH;
After destination node is received described PATH, the described professional mapping process that carries in the described PATH is configured to datum plane, and returns reservation message;
After described source node is received described reservation message, the described professional mapping process that consults is configured to datum plane.
4. the control method of a professional mapping process comprises:
Source node is initiated end-to-end connection and is set up signaling procedure, carries the professional mapping process of its support in PATH;
When destination node is received described PATH, professional mapping process according to the source node support of carrying in the described PATH, for the teleservice of creating connects, a kind of professional mapping process of selecting source node and destination node all to support, selected professional mapping process is configured to datum plane, return reservation message and give source node, carry the selected professional mapping process of described destination node in the described reservation message;
After described source node is received described reservation message, the described professional mapping process that carries in the described reservation message is configured to datum plane.
5. method as claimed in claim 4 is characterized in that,
When described destination node was received described PATH, if find the professional mapping process that do not have described source node and described destination node all to support, then the return path error message was given described source node.
6. as claim 4 or 5 described methods, it is characterized in that, the mapping process configuration subtype length value object of expanding in the label switched path attribute of described source node by described PATH carries the professional mapping process that described source node is supported, comprise type field, length field and professional mapping process information field in the described mapping process configuration subtype length value object, wherein:
Described type field is indicated the type of described object;
The length of described length field indicating services mapping process information field;
Use several bits to carry professional mapping process information in the described professional mapping process information field, each bit indicates whether to support a kind of specific professional mapping process.
7. the control system of a professional mapping process comprises source node and destination node, wherein:
Described source node is used for before teleservice connect to be set up, with described destination node by the professional mapping process of call negotiation, and, after negotiation finishes, the professional mapping process that configuring negotiation is good;
Described destination node is used for before teleservice connect to be set up, with described source node by the professional mapping process of call negotiation, and, after negotiation finishes, the professional mapping process that configuring negotiation is good.
8. system as claimed in claim 7 is characterized in that,
Described source node is to be used for: make a call to set up to destination node and ask, carry the professional mapping process that source node is supported in described call setup request message; And receive the call answering message that described destination node returns, from described call answering message, obtain the selected professional mapping process of described destination node; The described professional mapping process that described destination node is selected is the described professional mapping process that consults;
Described destination node is to be used for: the call setup request message that the reception sources node sends, professional mapping process according to source node support in the described call setup request message, for the teleservice of creating connects, a kind of professional mapping process of selecting source node and destination node all to support, return call answering message and give source node, carry the selected professional mapping process of destination node in the described call answering message.
9. system as claimed in claim 7 is characterized in that,
Described source node is to be used for, and after negotiation finishes, initiates end-to-end connection and sets up signaling procedure, carries the described professional mapping process that consults in PATH; And, when receiving the reservation message that described destination node returns, the described professional mapping process that consults is configured to datum plane;
Described destination node is to be used for, and receives described PATH, and the described professional mapping process that consults that carries in the described PATH is configured to datum plane, and returns reservation message and give described source node.
10. the control system of a professional mapping process comprises source node and destination node, wherein:
Described source node is used for: initiate end-to-end connection and set up signaling procedure, carry the professional mapping process of its support in PATH; And, receive the reservation message that described destination node returns, the professional mapping process that carries in the described reservation message is configured to datum plane;
Described destination node is used for: receive the described PATH that described source node sends, professional mapping process according to the source node support of carrying in the described PATH, for the teleservice of creating connects, a kind of professional mapping process of selecting described source node and destination node all to support, selected professional mapping process is configured to datum plane, return reservation message and give source node, carry the selected professional mapping process of destination node in the described reservation message.
11. system as claimed in claim 10 is characterized in that,
When described destination node also was used to receive described PATH, if find the professional mapping process that do not have source node and destination node all to support, then the return path error message was given described source node.
12. as claim 10 or 11 described systems, it is characterized in that, described source node, be to be used for disposing sub-time length value object to carry the professional mapping process that described source node is supported by the mapping process that the label switched path attribute of described signaling message is expanded, comprise type field, length field and professional mapping process information field in the described mapping process configuration subtype length value object, wherein:
Described type field is indicated the type of described object;
The length of described length field indicating services mapping process information field;
Use several bits to carry professional mapping process information in the described professional mapping process information field, each bit indicates whether to support a kind of specific professional mapping process.
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