CN102238439B - 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 optical-fiber network transmission field, relate in particular in a kind of optical transfer network ASON control method and the system of the business mapping process based on G.709.
Background technology
Optical transfer network (OTN) is for solving the large capacity of high-speed time-division multiplex (Time DivisionMultiplexing, TDM) signal, to transmit a kind of " digital wrapper " technology that problem proposes in 1999.The OTN of 2003 editions definition can provide the functions such as transmission, multiplexing, protection and monitoring management for client layer signal; the client layer signal of supporting is mainly synchronous transfer module (STM-N), asynchronous transfer mode (ATM) and the ethernet signal that passes through generic frame procedure (GFP) mapping support, and the speed grade of its definition is 2.5G, 10G and 40G.Along with transmitting the IPization of network carrying signal and popularizing of 10G LAN interface, the carrying of ten thousand mbit ethernets (10GE) on OTN becomes a major issue, therefore ITU-T developed G.sup43 standard in 2007, had 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, respectively corresponding Optical Channel Data Unit-k ODU1, ODU2 and ODU3.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, grouping (Packet) business adopts GFP mode to be mapped to ODUk, and these ODUk are mapped in corresponding optical channel transmission unit OTUk again.Certainly, the ODU of low rate grade also reusable in the ODU of two-forty grade.
Current OTN standard will be supported multiple mapping method, mainly contain GFP mapping, BMP, AMP and GMP mapping.While being mapped to OTN network for Ethernet service, there is diversified mapping process, can adopt respectively that mac frame is transparent, PCS layer is transparent or the 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 can support bit transparent mapped.
The difference of bit synchronous mapping process (BMP) and asynchronous mapping process (AMP):
in bit synchronous mapping process, for the OPUk clock of bit asynchronous mapping process, come from constant bit-rate 2.5G, 10G, the client signal of 40G or 10.3G.Constant bit-rate 2.5G to input, 10G, 40G or 10.3G carry out when synchronous again, without pull-in frequency or frame phase discontinuity.Constant bit-rate 2.5G, 10G, when 40G or 10.3G are mapped to OPUk, within the scope of OPUk frame without using adjustment capability.
in asynchronous mapping process, for the OPUk clock of asynchronous mapping process, come from clock, independence and the client signal of local generation.Constant bit-rate 2.5G, 10G when 40G is mapped to OPUk, needs to use positive and negative adjustment modes within the scope of OPUk frame.
Mac frame transparent mapped process comprises interval, lead code and the SFD removing between bag, only ethernet mac frame is mapped in OTN by GFP-F (GFP frame, ITU-T G.7041/Y.1303), owing to processing MAC layer, the method can be adjusted bandwidth, and Ethernet is realized to Flow Control.
PCS layer transparent mapped realizes by GFP-T, to Ethernet PCS layer bit stream recompile, can transparent transmission lead code and the information such as SFD, but frame gap need to be adjusted according to tranmitting data register (if clock is the method for synchronization, not needing to adjust), and the method is transparent transmission Ethernet PCS layer bit stream at utmost.
Bit transparent mapped comprise using Ethernet client signal (all bits) as CBR signal map in OTN, this require ethernet line speed (comprising PCS) must and OTN container match.The meaning of bit transparent mapped is:
1) on market, have the privately owned utilization (leading character or IFG carry privately owned OAM) of Ethernet, when this just requires 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 L2 coded signal to carry out 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 OTN network.
5) error performance of client signal monitors, when this just requires 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 MAC layer is transparent, PCS layer is transparent or the 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.First 40/100GbE client signal needs mapping to enter Payload Unit OPU3 and the OPU4 of ODU3 and ODU4, then by ODU layer, OTU layer, OCh layer, OMS layer and OTS layer, on optical fiber, transmits successively.
40GbE ethernet signal and 100GbE ethernet signal map to the key that OPU3 and OPU4 are OTN carryings, carry out standard at present in G.709 up-to-date augmented part.IEEE P802.3ba is that 40GbE and 100GbE have defined parallel Virtual Channel (Virtual Lane) and corresponding parallel physical interface, 40GbE signal is comprised of 4 Virtual Channels, 100GbE signal is comprised of 20 Virtual Channels, and PCS sublayer is all to encode based on 64B/66B.
40GbE speed is 41.25Gbit/s, and OPU3 speed is 40.15Gbit/s, cannot directly shine upon.Therefore after 40GbE parallel interface being converted to serial bit stream, need to adopt the method for code conversion to carry out speed compression, last asynchronous mapping enters OPU3.Therefore, 40GbE realization at present is PCS layer transparent mapped.
Because OPU4 is that speed is 104.355Gbit/s according to the message structure of the new definition of 100GbE, 100GbE line speed is 103.125Gbit/s.Therefore 100GbE directly asynchronous mapping enter OPU4, realize bit transparent mapped completely.
Therefore, the two ends of business must adopt identical mapping process, otherwise business cannot be at two ends by sending and receiving correctly.Can for every business by network management configuration to datum plane, but such configuration effort is very loaded down with trivial details, time-consuming and easily occur the situation of mispairing.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of control method and system of business 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 business mapping process, comprising: before teleservice connects foundation, source node and destination node are by call negotiation business mapping process; After negotiation, the business 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 call negotiation business mapping process:
Source node makes a call to set up to destination node and asks, and carries the business mapping process that source node is supported in described call setup request message;
When described destination node is received call setup request message, the business mapping process of supporting according to source node in described call setup request message, for the teleservice creating connects, a kind of business mapping process of selecting source node and destination node all to support, return to call answering message to described source node, in described call answering message, carry the selected business mapping process of described destination node;
Described source node receives described call answering message, obtains the selected business mapping process of described destination node from described call answering message, the business mapping process that the selected business mapping process of described destination node consults described in.
The step of the business mapping process that wherein, 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, the business mapping process consulting described in carrying in PATH;
Destination node is received after described PATH, the described business mapping process carrying is configured to datum plane, and returns to reservation message in described PATH;
Described source node is received after described reservation message, and the described business mapping process consulting is configured to datum plane.
The present invention also provides a kind of control method of business mapping process, comprising:
Source node is initiated end-to-end connection and is set up signaling procedure, carries the business mapping process of its support in PATH;
When destination node is received described PATH, the business mapping process of supporting according to the source node carrying in described PATH, for the teleservice creating connects, a kind of business mapping process of selecting source node and destination node all to support, selected business mapping process is configured to datum plane, return to reservation message to source node, in described reservation message, carry the selected business mapping process of described destination node;
Described source node is received after described reservation message, and the described business mapping process carrying in described reservation message is configured to datum plane.
Wherein, when described destination node is received described PATH, if the business mapping process that discovery does not have described source node and described destination node all to support, return path error message is 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 business mapping process that described source node is supported, described mapping process configuration subtype length value object comprises type field, length field and business mapping process information field, wherein:
Described type field is indicated the type of described object;
The length of described length field indicating services mapping process information field;
In described business mapping process information field, use several bits to carry business mapping process information, each bit indicates whether to support a kind of specific business mapping process.
The present invention also provides a kind of control system of business mapping process, comprises source node and destination node, wherein:
Described source node is for before teleservice connect to be set up, with described destination node by call negotiation business mapping process, and, after negotiation, the business mapping process that configuring negotiation is good;
Described destination node is for before teleservice connect to be set up, with described source node by call negotiation business mapping process, and, after negotiation, the business mapping process that configuring negotiation is good.
Wherein, described source node be for: to the destination node request of setting up that makes a call, in described call setup request message, carry the business mapping process that source node is supported; And receive the call answering message that described destination node returns, from described call answering message, obtain the selected business mapping process of described destination node; The business mapping process that the described business mapping process that described destination node is selected consults described in being;
Described destination node is the call setup request message sending for: reception sources node, the business mapping process of supporting according to source node in described call setup request message, for the teleservice creating connects, a kind of business mapping process of selecting source node and destination node all to support, return to call answering message to source node, in described call answering message, carry the selected business mapping process of destination node.
Wherein, described source node be for, after consulting, initiate end-to-end connection and set up signaling procedure, the business mapping process consulting described in carrying in PATH; And, while receiving the reservation message that described destination node returns, the described business mapping process consulting is configured to datum plane;
Described destination node be for, receive described PATH, the business mapping process consulting described in carrying in described PATH is configured to datum plane, and returns to reservation message to described source node.
The present invention also provides a kind of control system of business 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 business mapping process of its support in PATH; And, receive the reservation message that described destination node returns, the business mapping process carrying in described reservation message is configured to datum plane;
Described destination node is used for: receive the described PATH that described source node sends, the business mapping process of supporting according to the source node carrying in described PATH, for the teleservice creating connects, a kind of business mapping process of selecting described source node and destination node all to support, selected business mapping process is configured to datum plane, return to reservation message to source node, in described reservation message, carry the selected business mapping process of destination node.
Wherein, described destination node is also when receiving described PATH, if find the business mapping process that do not have source node and destination node all to support, return path error message is given described source node.
Wherein, described source node, that the mapping process of expanding for the label switched path attribute by described signaling message configures the business mapping process that sub-time length value object carries described source node support, described mapping process configuration subtype length value object comprises type field, length field and business mapping process information field, wherein:
Described type field is indicated the type of described object;
The length of described length field indicating services mapping process information field;
In described business mapping process information field, use several bits to carry business mapping process information, each bit indicates whether to support a kind of specific business mapping process.
Control method and the system of the business mapping process that the present invention proposes, can automatically at business two ends, consult the mapping process of teleservice, and automatically the mapping process consulting is configured to datum plane, improve configuration correctness, reduce setup time and configuration effort amount, reduce OTN network O&M cost.
Accompanying drawing explanation
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 that the present invention expands the form after LSP_ATTRIBUTES object, and object naming is Mapping Procedure Set sub-TLV;
Fig. 4 is the corresponding Signalling exchange flow process of the embodiment of the present invention 2;
Fig. 5 is in Signalling exchange flow process, and source node is mailing in the Path message of destination node, entrained business mapping process information;
Fig. 6 is in Signalling exchange flow process, and destination node mails in the Resv message of source node, entrained business mapping process information;
Fig. 7 is the corresponding Signalling exchange flow process of the embodiment of the present invention 3;
Fig. 8 is in Signalling exchange flow process, and source node is mailing in the Path message of destination node, entrained business mapping process information.
Embodiment
When different types of service is mapped to different OPUk or ODUk, need to adopt different mapping process, comprise:
sTM-16, when the constant bit-rate client signal of STM-64 and STM-256 is mapped to OPUK, is used asynchronous mapping process (AMP) or bit synchronous mapping process (BMP).
when 10GBASE-R constant bit-rate client signal is mapped to OPU2e, use bit synchronous mapping process.
fC-1200 constant bit-rate signal after time transparency decoding (TTT-Timing Transparent Transcoding), provides 50/51 compression ratio, by bit synchronous mapping process, is mapped to OPU2e.
when the client signal that the client signal of constant bit-rate 1.238G is mapped to OPU0,2.488G is mapped to OPU1, transparent decoding in use (TTT-Timing TransparentTranscoding), client signal speed is compressed to be applicable to before OPUk speed, use GMP mapping process.
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), client signal speed is compressed to be applicable to before OPUk speed, use GMP (Generic Mapping Procedure) mapping process.
when other constant bit-rate client signals are mapped to OPUflex, use bit synchronous mapping.
grouping client signal (Ethernet, MPLS and IP) is used GFP-F (Generic FramingProcedure frame) to be mapped in OPUk.
Constant bit-rate 2.5G (for example STM-16), 10G (for example STM-64), 40G (for example STM-256) are mapped to OPUk (k=1,2,3), time, bit rate tolerance limit (bit-ratetolerance) difference according to signal, adopts different mapping process:
the bit rate tolerance limit of ± 20ppm adopts bit synchronous mapping process (BMP);
the bit rate tolerance limit of ± 45ppm adopts asynchronous mapping process (AMP);
For example, when constant bit-rate 10.3G (10GBASE-R, namely 10GE Ethernet) signal (bit rate tolerance limit is ± 100ppm) is mapped to OPU2e, use bit synchronous mapping process.While shining upon other constant bit-rate signals (± 100ppm bit rate tolerance limit) to OPUk (k=0,1,2,3,4), by general mapping process (GMP), complete.
To be less than the constant bit-rate client signal of 1.238G, comprise when Transcoded 1000BASE-SX, STM-1, STM-4 and FC-100 are mapped to OPU0, use GMP.
for the Transcoded 1000BASE-SX (ethernet signal of 1.25G, can reach ± 100ppm of bit rate tolerance limit) in the GFP-T frame of synchronization map to 75-eight bit byte, this process becomes " TTT-Timing Transparent Transcoding "
When the constant bit-rate client signal (FC200) that will be greater than 1.238G and be less than 2.488G is mapped to OPU1, use GMP mapping mode.
When the constant bit-rate client signal that approaches 9.995G, 40.149G and 104.134 is mapped to respectively to OPU2, OPU3 and OPU4, use GMP mapping process.
During by FC-1200 (10518750kbit/s ± 100ppm), because speed is greater than OPU2e, must be compressed, adopt GFP-F encapsulation, the mapping process of GFP-F is by aliging the byte structure of each gfp frame to carry out with the byte structure of OPUk payload.Because variable length during gfp frame, that is to say that mapping is to not restriction of maximum frame size, so gfp frame likely surpasses the border of OPUk frame.Due in the GFP dress stage, inserted Idle frame, the capacity of the gfp frame therefore arriving in successive bits stream mode equals OPUk payload area.At encapsulated phase, gfp frame will be disturbed in encapsulation process.
When the constant bit-rate client signal (± 100ppm bit rate tolerance limit) that is greater than 2.488G is mapped to OPUflex, by BMP, complete.
When the constant bit-rate signal (STM-64/256) of ± 20ppm bit rate tolerance limit is mapped to OPUk-4v, can adopt asynchronous and bit synchronous mapping process.For Virtual Concatenation OPUk-4v, while using asynchronous mapping process, the clock of OPUk-4v derives from the local clock producing, and is independent of constant bit-rate client signal (4
(k)* 2488320kbit/), when client signal is mapped to OPUk-4v, use positive/negative adjustment modes.While using bit asynchronous mapping process, OPUk-4v clock derives from constant bit-rate client signal (4
(k)* 2488320kbit/), when client signal is mapped to OPUk-4v, without using positive/negative adjustment modes, when synchronous again to constant bit-rate signal, without pull-in frequency and FramePhase Discontinuity.
for example, when CBR10G (STM-64) signal map is arrived to OPU1-4v, may (possible) use asynchronous mapping process.
for example, when CBR40G signal (STM-256) is mapped to OPU2-4v,, may (possible) use asynchronous mapping process.
When the constant bit-rate signal (STM-256) of ± 20ppm bit rate tolerance limit is mapped to OPUk-16v, can adopt asynchronous and bit synchronous mapping process.For Virtual Concatenation OPUk-16v, while using asynchronous mapping process, the clock of OPUk-16v derives from the local clock producing, and is independent of constant bit-rate client signal (4
(k+1)* 2488 320kbit/), when client signal is mapped to OPUk-16v, use positive/negative adjustment modes.While using bit asynchronous mapping process, OPUk-16v clock derives from constant bit-rate client signal (4
(k+1)* 2488 320kbit/), when client signal is mapped to OPUk-4v, without using positive/negative adjustment modes, when synchronous again to constant bit-rate signal, without pull-in frequency and Frame Phase Discontinuity.
for example, when CBR40G (STM-256) signal map is arrived to OPU1-16v, may (possible) use asynchronous mapping process.
Adopt GFP-F encapsulation, the mapping process of GFP-F is by aliging the byte structure of each gfp frame to carry out with the byte structure of OPUk-Xv payload.Because variable length during gfp frame, that is to say that mapping is to not restriction of maximum frame size, so gfp frame likely surpasses the border of OPUk frame.Due in the GFP dress stage, inserted Idle frame, the capacity of the gfp frame therefore arriving in successive bits stream mode equals 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 be multiplexed into high-order OPUk by following two steps.
By 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: by CBR2G5, CBR10G or CBR40G (± 20ppm bit-rate tolerance, ± 20ppm bit rate tolerance) is mapped to OPUk (k=1,2,3);
AMP: by 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: CBR signal (for example, STM-64/256) is mapped to OPUk-4v;
GMP: CBR signal (for example, STM-64/256) is mapped to OPUk-4v
AMP: CBR signal (for example, STM-256) is mapped to OPUk-16v
GMP: CBR signal (for example, STM-256) is mapped to OPUk-16v
GFP-F: gfp frame is mapped to OPUk-Xv
AMP: ODUj (± 20ppm bit-rate tolerance) is mapped to ODTUjk ((j, k)={ (0,1), (1,2), (1,3), (2,3) }
GMP: by ODUj (j=0,1,2,2e, 3, flex) (± 100ppm) is mapped to ODTUk.ts (k=2,3,4; Ts=M)
BMP: CBR10G3 (± 100ppm bit-rate tolerance) is mapped to OPU2e
GFP-F: FC-1200 (10518750kbit/s ± 100ppm) signal map is arrived to OPU2e
GMP+GFP-T: Transcoded 1000BASE-SX (1250000kbit/s ± 100ppm) is mapped to OPU0
GMP: Sub-1.238Gbit/s CBR (e.g., STM-1, STM-4and FC-100) client signal is mapped to OPU0
GMP: Supra-1.238 to Sub-2.488Gbit/s CBR client signal (e.g, FC200) is mapped to OPU1
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 to OPUflex
Therefore, for an end-to-end ODUk business (such as ODU2 business), in the time will the constant bit-rate business of CBR10G being mapped to OPU2 at the two ends of business, can adopt BMP, AMP, or GMP.If two ends adopt different mapping process, business just cannot correctly be transmitted at the end-to-end path of ODU2.
The present invention proposes a kind of control method of business mapping process, comprising:
Before teleservice connect to be set up, source node and destination node be by call negotiation business mapping process, after negotiation, and the business mapping process that described source node and destination node configuring negotiation are good.
Wherein, source node and destination node comprise by the step of call negotiation business mapping process:
Step S101, source node makes a call to set up to destination node and asks, and carries the business mapping process that source node is supported in described call setup request message;
Step S102, when having carried the call request message of the business mapping process that source node supports and arrived destination node, for the teleservice type that will create, the business mapping process of supporting according to source node in described call setup request message, destination node judges whether the business 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 creating connects, in all business mapping process that source node and destination node are supported, a kind of business mapping process of selecting both sides all to support;
Wherein, if exist multiple business mapping process to be supported by source and destination node, a kind of business mapping process of destination node How to choose is the local behavior of destination node so simultaneously.
Step S103, destination node returns to call answering message to source node, carries the selected business mapping process of destination node in described call answering message; If the business mapping process that does not have source node and destination node all to support, returns to indication information, indication cannot match the business mapping process that both sides support;
Step S104, when having carried the call answering message arrival source node of the selected business mapping process of destination node, source node is recorded the selected business mapping process of the destination node carrying in described call answering message, as the business mapping process consulting.
The step of the business mapping process that wherein, described source node and destination node configuring negotiation are good comprises:
Step S201, call negotiation is complete, and source node is initiated end-to-end connection and is set up signaling procedure, and in the message of path (Path), carries the business mapping process having consulted;
Step S202, destination node receives after Path message, directly the business mapping process carrying in described Path message is configured on datum plane, and upstream nodes is returned to reservation (Resv) message;
Step S203, when source node receives after reservation (Resv) message, is configured to the described business mapping process consulting on datum plane.
Wherein, can be by adding the mode of attribute type length value (Attributes TLV) object to carry the business mapping process that source node is supported in message related to calls, attribute type length value object comprises type field, length field and reserved field, the business mapping process information that in reserved field, portability source node is supported.Certainly, also can carry by other means the business mapping process that source node is supported in message related to calls, the present invention is not construed as limiting this.
In another embodiment of the present invention, can by call negotiation process, not carry out consultation business service mapping process yet, directly by teleservice, connect and set up signaling consultation business service mapping process.The present invention also provides a kind of control method of business mapping process, comprising:
When source node is set up teleservice connection at control plane by distributed signaling mode, in PATH, carry the business mapping process of its support;
When having carried path (Path) message of the business mapping process that source node supports while arriving destination node, for the teleservice type that will create, the business mapping process of supporting according to the source node carrying in described PATH, destination node need to judge whether the business mapping process of supporting that source node is supported; And the business mapping process of supporting according to destination node, is that the teleservice creating connects, in all business mapping process that source node and destination node are supported, a kind of business mapping process of selecting both sides all to support; And this business mapping process is configured on the datum plane of destination node,
Wherein, if exist multiple business mapping process to be supported by source and destination node, a kind of business mapping process of destination node How to choose is the local behavior of destination node so simultaneously.
Destination node returns to reservation (Resv) message to source node, carries the selected business mapping process of destination node in described Resv message;
When having carried reservation (Resv) the message arrival source node of the selected business mapping process of destination node, source node is configured to the selected business mapping process of the destination node carrying in described Resv message on the datum plane of source node.
Wherein, when described destination node is received described PATH, if the business mapping process that discovery does not have described source node and described destination node all to support, return path mistake (PathErr) message is 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 business mapping process that described source node is supported, described mapping process configuration subtype length value object comprises type field, length field and business mapping process information field, wherein:
Described type field is indicated the type of described object;
The length of described length field indicating services mapping process information field;
In described business mapping process information field, use several bits to carry business mapping process information, each bit indicates whether to support a kind of specific business mapping process.
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention.
Embodiment 1
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; During this object of intermediate node None-identified on label switched path, must continue transmitting signaling message, so just can guarantee that the attribute of label switched path can arrive destination node.And source node need to know whether the attribute of label switched path correctly plays a role at destination node, source node can, in LSP_ATTRIBUTES attribute, require destination node report executing result; After destination node is carried out, with the Attributes subobject of RRO object, report whether it works to the attribute receiving.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 meet the request of this attribute, it will refuse this Path message.
The present invention expands the LSP_ATTRIBUTES object of RFC5420, carries the business mapping process that source node is supported; Expand RRO Attributes subobject simultaneously, carry the selected business mapping process of destination node.
The control method of business 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), called after mapping process configures sub-TLV (MappingProcedure Set sub-TLV), is carried in the LSP_ATTRIBUTES object of Path message.As shown in Figure 3, mapping process configures sub-TLV and comprises type (Type) field, length (Length) field and business mapping process information field, and described type field is indicated the type of described object, and its value can be determined as required; The length of described length field indicating services mapping process information field; In described business mapping process information field, use several bits to carry business mapping process information, each bit indicates whether to support a kind of specific business mapping process, in Fig. 3, the business mapping process that uses bit B, A, G, F and T indication source node to support, the implication of each bit is as follows:
B bit: if this bit assignment is 1, indication source node is supported bit synchronous mapping process (BMP); If this bit assignment is 0, indication source node is not supported bit synchronous mapping process (BMP).
A bit: if this bit assignment is 1, indication source node is supported asynchronous mapping process (AMP); If this bit assignment is 0, indication source node is not supported asynchronous mapping process (AMP).
G bit: if this bit assignment is 1, indication source node is supported general mapping process (GMP); If this bit assignment is 0, indication source node is not supported general mapping process (GMP).
F bit: if this bit assignment is 1, indication source node is supported general frame forming process (GFP-F); If this bit assignment is 0, indication source node is not supported general frame forming process (GFP-F).
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, indication source node is the general frame forming process (GFP-T) of tenaculum time transparency decoding not.
A plurality of bit combinations represent source node support multiple business mapping process.Such as, if B, A, G, F, T are set to 11100, represent that source node supports BMP, AMP and GMP business mapping process.
The value of above-mentioned each bit (B/A/G/F/T), also can use value is to express support for corresponding business mapping process at 0 o'clock, and value is to represent not support corresponding business mapping process at 1 o'clock, and the present invention is not construed as limiting this.
Above-mentioned method of carrying the business mapping process of source node support in Path message is only example, and the present invention is not construed as limiting this, and other method for expressing also can be used.
Use defined newtype TLV, be carried in the LSP_ATTRIBUTES object of reservation (Resv) message, indicate destination node after consulting with source node, the business mapping process of supporting.Such as, if B, A, G, F, T are set to 00011, represent that source node supports GFP-T and GFP-F business mapping process.
Embodiment 2
In order to solve source node and destination node, consult selection business mapping process, the present invention provides following embodiment.At source node, mail to and in the LSP_ATTRIBUTES object in destination node Path message, increase the TLV of a newtype (as shown in Figure 3), the business mapping process of source node support is notified to the destination node on optical channel.Destination node receives after the Path message of the business mapping process that carries described source node support, the mapping process of supporting according to destination node, for the end-to-end ODUk creating connects, in all business mapping process that source node and destination node are supported, a kind of business mapping process of selecting both sides all to support, and this business mapping process is configured on the datum plane of destination node.At destination node, return in reservation (Resv) message of source node, carry the selected business mapping process of destination node.
As shown in Figure 4, source node is for CBR2G5, and CBR10G or CBR40G business is supported AMP, BMP and GMP mapping mode, and destination node is for CBR2G5, and CBR10G or CBR40G business, only supports AMP mapping mode, and it is as follows that business 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 for the business mapping process for creating the business support that end-to-end ODUk carries, carry and represent source node support AMP, BMP and GMP business mapping process, as shown in Figure 5, B, A, G, F, T are set to 11100 to a kind of carrying mode;
402, destination node receives after Path message, if indicated the business mapping process that source node is supported in LSP ATTRIBUTES object, check the business mapping process that destination node this locality is supported, because destination node is for CBR2G5, CBR10G or CBR40G business, only supports AMP mapping mode.Therefore, destination node connects for the end-to-end ODUk creating, in all business mapping process that source node and destination node are supported, and a kind of business mapping process of selecting both sides all to support, AMP namely, and this business mapping process is configured on the datum plane of destination node.
403, destination node is returning in the Resv message of upstream node, by recording the LSP_ATTRIBUTES in the subobject of destination node in RRO, carry the selected business mapping process of destination node, AMP namely, as shown in Figure 6, B, A, G, F, T are set to 01000 to a kind of carrying mode;
404, when having carried reservation (Resv) message of the selected business mapping process of destination node while arriving source node, source node by the destination node carrying in this Resv message definite business mapping process be configured in source node data plane.
Embodiment 3
As shown in Figure 7, source node is for CBR2G5, and CBR10G or CBR40G business, only supports GMP mapping mode, and destination node is for CBR2G5, and CBR10G or CBR40G business, only supports AMP mapping mode, and business 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 for the business mapping process for creating the business support that end-to-end ODUk carries, carry expression source node and only support GMP business mapping process, as shown in Figure 8, B, A, G, F, T are set to 00100 to a kind of carrying mode;
702, destination node receives after Path message, if indicated the business mapping process that source node is supported in LSP_ATTRIBUTES object, check the business mapping process that destination node this locality is supported, because destination node is for CBR2G5, CBR10G or CBR40G business, only supports AMP mapping mode.Therefore, destination node cannot connect for the end-to-end ODUk creating, in all business mapping process that source node and destination node are supported, a kind of business mapping process of selecting both sides all to support, so destination node upstream returns to 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 service creation failure to client.
The present invention also provides a kind of control system of business mapping process, comprises source node and destination node, wherein:
Described source node is for before teleservice connect to be set up, with described destination node by call negotiation business mapping process, and, after negotiation, the business mapping process that configuring negotiation is good;
Described destination node is for before teleservice connect to be set up, with described source node by call negotiation business mapping process, and, after negotiation, the business mapping process that configuring negotiation is good.
Wherein, described source node be for: to the destination node request of setting up that makes a call, in described call setup request message, carry the business mapping process that source node is supported; And receive the call answering message that described destination node returns, from described call answering message, obtain the selected business mapping process of described destination node; The business mapping process that the described business mapping process that described destination node is selected consults described in being;
Described destination node is the call setup request message sending for: reception sources node, the business mapping process of supporting according to source node in described call setup request message, for the teleservice creating connects, a kind of business mapping process of selecting source node and destination node all to support, return to call answering message to source node, in described call answering message, carry the selected business mapping process of destination node.
Wherein, described source node be for, after consulting, initiate end-to-end connection and set up signaling procedure, the business mapping process consulting described in carrying in PATH; And, while receiving the reservation message that described destination node returns, the described business mapping process consulting is configured to datum plane;
Described destination node be for, receive described PATH, the business mapping process consulting described in carrying in described PATH is configured to datum plane, and returns to reservation message to described source node.
The present invention also provides a kind of control system of business 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 business mapping process of its support in PATH; And, receive the reservation message that described destination node returns, the business mapping process carrying in described reservation message is configured to datum plane;
Described destination node is used for: receive the described PATH that described source node sends, the business mapping process of supporting according to the source node carrying in described PATH, for the teleservice creating connects, a kind of business mapping process of selecting described source node and destination node all to support, selected business mapping process is configured to datum plane, return to reservation message to source node, in described reservation message, carry the selected business mapping process of destination node.
Wherein, described destination node is also when receiving described PATH, if find the business mapping process that do not have source node and destination node all to support, return path error message is given described source node.
Wherein, described source node, for the mapping process of expanding by the label switched path attribute of described signaling message, configure sub-time length value object and carry the business mapping process that described source node is supported, described mapping process configuration subtype length value object comprises type field, length field and business mapping process information field, wherein:
Described type field is indicated the type of described object;
The length of described length field indicating services mapping process information field;
In described business mapping process information field, use several bits to carry business mapping process information, each bit indicates whether to support a kind of specific business mapping process.
Claims (8)
1. a control method for business mapping process, comprising:
Before teleservice connects foundation, source node and destination node are by call negotiation business mapping process; After negotiation, the business mapping process that described source node and destination node configuring negotiation are good; Described source node and destination node comprise by the step of call negotiation business mapping process:
Source node makes a call to set up to destination node and asks, and carries the business mapping process that source node is supported in described call setup request message;
When described destination node is received call setup request message, the business mapping process of supporting according to source node in described call setup request message, for the teleservice creating connects, a kind of business mapping process of selecting source node and destination node all to support, return to call answering message to described source node, in described call answering message, carry the selected business mapping process of described destination node;
Described source node receives described call answering message, obtains the selected business mapping process of described destination node from described call answering message, the business mapping process that the selected business mapping process of described destination node consults described in.
2. the method for claim 1, is characterized in that, the step of the business 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, the business mapping process consulting described in carrying in PATH;
Destination node is received after described PATH, the described business mapping process carrying is configured to datum plane, and returns to reservation message in described PATH;
Described source node is received after described reservation message, and the described business mapping process consulting is configured to datum plane.
3. a control method for business mapping process, comprising:
Source node is initiated end-to-end connection and is set up signaling procedure, carries the business mapping process of its support in PATH;
When destination node is received described PATH, the business mapping process of supporting according to the source node carrying in described PATH, for the teleservice creating connects, a kind of business mapping process of selecting source node and destination node all to support, selected business mapping process is configured to datum plane, return to reservation message to source node, in described reservation message, carry the selected business mapping process of described destination node;
Described source node is received after described reservation message, and the described business mapping process carrying in described reservation message is configured to datum plane;
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 business mapping process that described source node is supported, described mapping process configuration subtype length value object comprises type field, length field and business mapping process information field, wherein:
Described type field is indicated the type of described object;
The length of described length field indicating services mapping process information field;
In described business mapping process information field, use several bits to carry business mapping process information, each bit indicates whether to support a kind of specific business mapping process.
4. method as claimed in claim 3, is characterized in that,
When described destination node is received described PATH, if the business mapping process that discovery does not have described source node and described destination node all to support, return path error message is given described source node.
5. a control system for business mapping process, comprises source node and destination node, wherein:
Described source node is for before teleservice connect to be set up, with described destination node by call negotiation business mapping process, and, after negotiation, the business mapping process that configuring negotiation is good; Described source node be for: to the destination node request of setting up that makes a call, in described call setup request message, carry the business mapping process that source node is supported; And receive the call answering message that described destination node returns, from described call answering message, obtain the selected business mapping process of described destination node; The business mapping process that the described business mapping process that described destination node is selected consults described in being;
Described destination node is for before teleservice connect to be set up, with described source node by call negotiation business mapping process, and, after negotiation, the business mapping process that configuring negotiation is good; Described destination node is the call setup request message sending for: reception sources node, the business mapping process of supporting according to source node in described call setup request message, for the teleservice creating connects, a kind of business mapping process of selecting source node and destination node all to support, return to call answering message to source node, in described call answering message, carry the selected business mapping process of destination node.
6. system as claimed in claim 5, is characterized in that,
Described source node be for, after consulting, initiate end-to-end connection and set up signaling procedure, the business mapping process consulting described in carrying in PATH; And, while receiving the reservation message that described destination node returns, the described business mapping process consulting is configured to datum plane;
Described destination node be for, receive described PATH, the business mapping process consulting described in carrying in described PATH is configured to datum plane, and returns to reservation message to described source node.
7. a control system for business 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 business mapping process of its support in PATH; And, receive the reservation message that described destination node returns, the business mapping process carrying in described reservation message is configured to datum plane;
Described destination node is used for: receive the described PATH that described source node sends, the business mapping process of supporting according to the source node carrying in described PATH, for the teleservice creating connects, a kind of business mapping process of selecting described source node and destination node all to support, selected business mapping process is configured to datum plane, return to reservation message to source node, in described reservation message, carry the selected business mapping process of destination node;
Described source node, that the mapping process of expanding for the label switched path attribute by described signaling message configures the business mapping process that sub-time length value object carries described source node support, described mapping process configuration subtype length value object comprises type field, length field and business mapping process information field, wherein:
Described type field is indicated the type of described object;
The length of described length field indicating services mapping process information field;
In described business mapping process information field, use several bits to carry business mapping process information, each bit indicates whether to support a kind of specific business mapping process.
8. system as claimed in claim 7, is characterized in that,
Described destination node is also when receiving described PATH, if find the business mapping process that do not have source node and destination node all to support, return path error message is given described source node.
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| CN1866960A (en) * | 2006-02-17 | 2006-11-22 | 华为技术有限公司 | Method for confirming mapping relation between cross-domain service domain interior domains |
| CN1929401A (en) * | 2006-07-26 | 2007-03-14 | 华为技术有限公司 | Method for end-to-end data business establishment |
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| CN1866960A (en) * | 2006-02-17 | 2006-11-22 | 华为技术有限公司 | Method for confirming mapping relation between cross-domain service domain interior domains |
| CN1929401A (en) * | 2006-07-26 | 2007-03-14 | 华为技术有限公司 | Method for end-to-end data business establishment |
| CN101188598A (en) * | 2006-11-22 | 2008-05-28 | 华为技术有限公司 | System and method for service call control and service control point device |
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