CN105227371A - A kind of bandwidth chahnel labeling method based on ODUflex - Google Patents
A kind of bandwidth chahnel labeling method based on ODUflex Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0896—Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/76—Admission control; Resource allocation using dynamic resource allocation, e.g. in-call renegotiation requested by the user or requested by the network in response to changing network conditions
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Abstract
The invention discloses a kind of bandwidth chahnel labeling method based on ODUflex, comprising: to each passage configuration committed information rate 0_CIR of the ODUflex passage of dynamic conditioning, the highest information rate O_PIR, stream attribute ID during configuration service? O_ID and real-time bandwidth BW tetra-bandwidth parameters; Real-time bandwidth and committed information rate and the highest information rate are compared, when comparative result is BW≤0_CIR, ODUflex bandwidth chahnel is adjusted to real-time bandwidth; When comparative result is 0_CIR < BW≤O_PIR, ODUflex guarantee commitment information speed 0_CIR bandwidth, is greater than committed information rate 0_CIR and ensures that portions of bandwidth is according to common bandwidth and service priority strategy decision; When comparative result is BW > O_PIR, ODUflex bandwidth chahnel is adjusted to the highest information rate O_PIR.Statistic multiplexing is incorporated into OTN aspect by the present invention, realize oarse-grained statistic multiplexing, improve OTN network bandwidth service efficiency, and according to the properties of flow of different channel service in the repeating process of ODUflex particle, the QOS function of different priority levels passage can be realized.
Description
Technical field
The present invention relates to optical transfer network, be specifically related to a kind of bandwidth chahnel labeling method based on ODUflex.
Background technology
OTN (OpticalTransportNetwork, optical transfer network) is based on wavelength-division multiplex technique, introduces electric layer simultaneously and intersects, and realizes the services of large granularities scheduling based on ODUk (optical channel data cell) and transparent transmission.Existing OTN equipment only provides the rigid conduit based on ODUk, and transmission capacity is large, long transmission distance, but the statistic multiplexing that cannot realize ODUk pipeline.
PTN (PacketTransportNetwork, Packet Transport Network) be the aspect arranged between IP operation and bottom light-transmitting medium, the requirement that it transmits for the sudden of Packet Service flow and statistic multiplexing and designing, the statistic multiplexing simultaneously realizing bandwidth chahnel providing end to end connection.
In traditional network application, the statistic multiplexing function of network traffics completes mainly through PTN network, and based on the flow distribution of LSP, PW in Access Layer, convergence-level, flow particle is less; And the Large Copacity transmission of the main finishing service of OTN network and the scheduling of L1/L0 layer, but be limited to the characteristic of ODUk rigid conduit, do not possess the condition realizing statistic multiplexing.
Along with the fast development of IP network, bandwidth demand explosive growth, the statistic multiplexing granularity based on industry stream that conventional P TN network provides is too little, can not meet IP network growth requirement.And ODUflex, the proposition of G.Hao, the pipeline of OTN network is made to be no longer traditional ODUk fixed transmission bandwidth, ODUflex makes non-standard business all by ODUk particle that the cascade acquisition of ODU0 particle bandwidth and own service speed match, meanwhile, G.hao also achieves the dynamic conditioning of ODUflex bandwidth chahnel.Therefore, how realize the statistic multiplexing function based on ODU (optical channel data cell) bulky grain passage at the OTN aspect statistic multiplexing introduced based on ODUflex, thus the QOS realizing business has become urgent need deals with problems.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiency of above-mentioned PTN/OTN networking mode, and based on the dynamic bandwidth utilizing G.hao to propose, the statistic multiplexing introduced based on ODUflex in OTN aspect realizes based on the statistic multiplexing function of ODU bulky grain passage.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is to provide a kind of bandwidth chahnel labeling method based on ODUflex, comprises the following steps:
When configuration service, committed information rate 0_CIR, the highest information rate O_PIR, stream attribute IDO_ID and real-time bandwidth BW tetra-bandwidth parameters are configured to each passage of the ODUflex passage of dynamic conditioning;
Real-time bandwidth BW and committed information rate 0_CIR and the highest information rate O_PIR is compared, according to comparative result adjustment ODUflex bandwidth chahnel, wherein,
When comparative result is BW≤0_CIR, ODUflex bandwidth chahnel is adjusted to real-time bandwidth;
When comparative result is 0_CIR < BW≤O_PIR, ODUflex guarantee commitment information speed 0_CIR bandwidth, is greater than committed information rate 0_CIR and ensures that portions of bandwidth is according to common bandwidth and service priority strategy decision;
When comparative result is BW > O_PIR, ODUflex bandwidth chahnel is adjusted to the highest information rate O_PIR.
In the above-mentioned methods,
Described committed information rate 0_CIR take ODU0 as least unit, identifies ODUflex bandwidth with N × ODU0;
The highest described information rate O_PIR take ODU0 as least unit, identifies ODUflex bandwidth with M × ODU0;
Described stream attribute IDO_ID represents service priority with O_ID value, and the less service priority of O_ID value is higher;
Described real-time bandwidth BW represents the real-time bandwidth of passage.
In the above-mentioned methods, described committed information rate 0_CIR, the highest information rate O_PIR, stream attribute IDO_ID and real-time bandwidth BW tetra-bandwidth parameters utilize the RES byte of ODUk expense in OTN frame to define;
Described four bandwidth parameters are specifically defined as at RES byte location and length: in RES byte from left to right, the 1st, 2 bytes be used for described committed information rate O_CIR byte; 3rd, 4 bytes are used for the highest described information rate O_PIR byte; 5th byte is used for described stream attribute IDO_ID byte; 6th byte is used for described real-time bandwidth BW byte.
In the above-mentioned methods, described committed information rate O_CIR byte is specifically defined as:
1st byte of RES byte and the 1st of the 2nd byte are defined as the reserved place RES_1 of described committed information rate O_CIR from left to right; The 2nd to the 8th of 2nd byte is defined as the ODU0 cascade number mark CIR_ID of described committed information rate O_CIR bandwidth;
Wherein, described CIR_ID span is that 0 to 127, CIR_ID value gets 0 for without engagement information rate 0_CIR guaranteed bandwidth.
In the above-mentioned methods, the highest described information rate O_PIR byte is specifically defined as:
From left to right for the 3rd byte of RES byte and the 1st of the 4th byte be defined as described in the reserved place RES_2 of the highest information rate O_PIR, the ODU0 cascade number mark PIR_ID of the highest information rate O_PIR bandwidth described in the 2nd to the 8th of the 4th byte is defined as;
Wherein, described PIR_ID span is 1 to 127, and " 0000000 " is invalid value, and PIR_ID value must be greater than 0.
In the above-mentioned methods, being specifically defined as of described stream attribute IDO_ID byte:
High 4 reserved place RES_3 being defined as described stream attribute IDO_ID of the 5th byte of described RES byte, low 4 are defined as priority level progression;
Wherein, described stream attribute IDO_ID span is 0 to 15, and " 0000 " is limit priority, and " 1111 " are lowest priority.
In the above-mentioned methods, the ODU0 cascade number of the highest information rate O_PIR bandwidth described in described real-time bandwidth BW byte is specifically defined as, value is 1-225, and " 00000000 " is invalid value, and real-time bandwidth BW must be greater than 0.
In the above-mentioned methods, described real-time bandwidth BW take ODU0 as smallest particles, in OTN frame, periodically real-time bandwidth BW bandwidth value is carried when MFAS value is the integral multiple of 16, equipment is automatically according to real-time bandwidth BW bandwidth value adjustment ODUflex bandwidth chahnel, meanwhile, follow O_CIR and O_PIR to limit bandwidth.
Based on the dynamic bandwidth that the present invention proposes by G.hao, and utilize the RES byte in ODU frame overhead, ODUflex pipeline for bearing data service defines corresponding properties of flow, statistic multiplexing is incorporated into OTN aspect, realize oarse-grained statistic multiplexing, improve OTN network bandwidth service efficiency; The OTN equipment that simultaneously breaks traditions converges the rigidity characteristics that bandwidth must conform to completely with line side outlet bandwidth, according to the properties of flow of different channel service in the repeating process of ODUflex particle, can realize the QOS function of different priority levels passage.
Accompanying drawing explanation
Fig. 1 is the flow chart of a kind of bandwidth chahnel labeling method based on ODUflex provided by the invention;
Fig. 2 is the particular location schematic diagram of RES byte in OTN frame of ODUk expense;
Fig. 3 is position and the length schematic diagram of committed information rate, the highest information rate and stream attribute ID tri-bandwidth parameter bytes in RES byte in the present invention.
Embodiment
Below in conjunction with Figure of description and specific embodiment, the present invention is described in detail.
A kind of bandwidth chahnel labeling method based on ODUflex provided by the invention, as shown in Figure 1, comprises the following steps:
Step 1, when configuration service, committed information rate 0_CIR, the highest information rate O_PIR, stream attribute IDO_ID and real-time bandwidth BW tetra-bandwidth parameters are configured to each passage of the ODUflex passage of dynamic conditioning, as shown in table 1, committed information rate 0_CIR take ODU0 as least unit, identifies ODUflex bandwidth with N × ODU0; The highest information rate O_PIR take ODU0 as least unit, identifies ODUflex bandwidth with M × ODU0; Stream attribute IDO_ID represents service priority with O_ID value, and the less service priority of O_ID value is higher; Real-time bandwidth BW represents the real-time bandwidth of passage.
Table 1: to four relevant bandwidth parameters tables of each passage configuration of the ODUflex passage of dynamic conditioning.
Step 2, real-time bandwidth BW and committed information rate 0_CIR and the highest information rate O_PIR to be compared, when comparative result is BW≤0_CIR, perform step 3; When comparative result is 0_CIR < BW≤O_PIR, perform step 4; When comparative result is BW > O_PIR, perform step 5;
Step 3, ODUflex bandwidth chahnel is adjusted to real-time bandwidth;
Step 4, ODUflex guarantee commitment information speed 0_CIR bandwidth, be greater than committed information rate 0_CIR and ensure that portions of bandwidth (O_PIR) is according to common bandwidth and service priority strategy decision, namely the various algorithms of forwarding of packets strategy are directly quoted, as PQ, WFQ etc., often kind of strategy is all different for the congested process of business;
Step 5, ODUflex bandwidth chahnel is adjusted to the highest information rate O_PIR.
In the present invention, utilize the RES byte definition committed information rate 0_CIR of ODUk expense in OTN frame, the highest information rate O_PIR, stream attribute IDO_ID and real-time bandwidth BW tetra-bandwidth parameters, the RES byte of the ODUk expense particular location in OTN frame as shown in Figure 2.
Fig. 3 is position and the length schematic diagram of committed information rate, the highest information rate and stream attribute ID tri-bandwidth parameter bytes in RES byte, in RES byte from left to right, 1st, 2 bytes are used for committed information rate O_CIR byte, 3rd, 4 bytes are used for the highest information rate O_PIR byte, 5th byte is used for stream attribute IDO_ID byte, specifically defines as table 2.
Table 2: the position of committed information rate 0_CIR, the highest information rate O_PIR and stream attribute IDO_ID tri-bandwidth parameter bytes and length specifically define in ODUk expense RES byte.
In table 2, committed information rate O_CIR byte from left to right the 1st byte of RES byte and the 1st of the 2nd byte is defined as the reserved place RES_1 of O_CIR, and the 2nd to the 8th of the 2nd byte is defined as the ODU0 cascade number mark CIR_ID of committed information rate O_CIR bandwidth.The present invention considers that present stage single channel rate is 100G to the maximum, therefore CIR_ID is temporarily defined into and can supports that being greater than 100 ODU0 cascades gets final product (therefore CIR_ID gets 7 temporarily), if when follow-up single channel rate continues to promote, the reserved place RES_1 byte of direct use O_CIR is expanded, CIR_ID specifically defines, as shown in table 3.
Table 3:CIR_ID specifically defines.
In table 2, the highest information rate O_PIR byte is from left to right for the 3rd byte of RES byte and the 1st of the 4th byte are defined as the reserved place RES_2 of O_PIR, the 2nd to the 8th of 4th byte is defined as the ODU0 cascade number mark PIR_ID of the highest information rate O_PIR bandwidth, present stage, single channel rate was 100G to the maximum, therefore PIR_ID temporarily only need be defined into and can support that 100 ODU0 cascades get final product (therefore PIR_ID gets 7 temporarily), if when follow-up single channel rate continues to promote, the reserved place RES_2 byte of direct use O_PIR is expanded, PIR_ID specifically defines, as shown in table 4.
Table 4:PIR_ID specifically defines.
In table 2, high 4 of stream attribute IDO_ID byte are defined as O_ID reserved place RES_3, low 4 is significance bit, be defined as priority level progression, " 0000 " is limit priority, and " 1111 " are lowest priority, present stage temporarily defines 16 kinds of priority levels, the follow-up O_ID reserved place RES_3 that can use as required expands priority type, and O_ID specifically defines, as shown in table 5.
Table 5:O_ID specifically defines.
| Sequence number | High 4 | Low 4 | Details describes | Remarks |
| 1 | 0000 | 0000 | Priority " 0 " | Numerical value is less, and priority is higher |
| 2 | 0000 | 0001 | Priority " 1 " | Numerical value is less, and priority is higher |
| 3 | 0000 | 0010 | Priority " 2 " | Numerical value is less, and priority is higher |
| 4 | 0000 | 0011 | Priority " 3 " | Numerical value is less, and priority is higher |
| 5 | 0000 | 0100 | Priority " 4 " | Numerical value is less, and priority is higher |
| 6 | 0000 | 0101 | Priority " 5 " | Numerical value is less, and priority is higher |
| 7 | 0000 | 0110 | Priority " 6 " | Numerical value is less, and priority is higher |
| 8 | 0000 | 0111 | Priority " 7 " | Numerical value is less, and priority is higher |
| 9 | 0000 | 1000 | Priority " 8 " | Numerical value is less, and priority is higher |
| 10 | 0000 | 1001 | Priority " 9 " | Numerical value is less, and priority is higher |
| 11 | 0000 | 1010 | Priority " 10 " | Numerical value is less, and priority is higher |
| 12 | 0000 | 1011 | Priority " 11 " | Numerical value is less, and priority is higher |
| 13 | 0000 | 1100 | Priority " 12 " | Numerical value is less, and priority is higher |
| 14 | 0000 | 1101 | Priority " 13 " | Numerical value is less, and priority is higher |
| 15 | 0000 | 1110 | Priority " 14 " | Numerical value is less, and priority is higher |
| 16 | 0000 | 1111 | Priority " 15 " | Numerical value is less, and priority is higher |
In the present invention, in OTN frame the RES byte of ODUk expense from left to right the 6th byte be used for real-time bandwidth BW byte, the ODU0 cascade number of the highest information rate O_PIR bandwidth described in bandwidth BW byte value is defined as, value is 1-225, real-time bandwidth BW specifically defines, as shown in table 6, real-time bandwidth BW take ODU0 as smallest particles, for reducing chip computational burden, only working as MFAS (Multi-frameAlignmentSignal, multiframe alignment signal) value periodically carries real-time bandwidth BW bandwidth value when being the integral multiple of 16 in OTN frame, equipment is automatically according to real-time bandwidth BW bandwidth value adjustment ODUflex bandwidth chahnel, simultaneously, follow O_CIR/O_PIR to limit bandwidth, namely be the O_CIR/O_PIR bandwidth of step units with ODU0, when O_CIR bandwidth obtains guarantee completely, O_PIR bandwidth determines according to the concrete condition of common bandwidth resource and other business.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1., based on a bandwidth chahnel labeling method of ODUflex, it is characterized in that, comprise the following steps:
When configuration service, committed information rate 0_CIR, the highest information rate O_PIR, stream attribute IDO_ID and real-time bandwidth BW tetra-bandwidth parameters are configured to each passage of the ODUflex passage of dynamic conditioning;
Real-time bandwidth BW and committed information rate 0_CIR and the highest information rate O_PIR is compared, according to comparative result adjustment ODUflex bandwidth chahnel, wherein,
When comparative result is BW≤0_CIR, ODUflex bandwidth chahnel is adjusted to real-time bandwidth;
When comparative result is 0_CIR < BW≤O_PIR, ODUflex guarantee commitment information speed 0_CIR bandwidth, is greater than committed information rate 0_CIR and ensures that portions of bandwidth is according to common bandwidth and service priority strategy decision;
When comparative result is BW > O_PIR, ODUflex bandwidth chahnel is adjusted to the highest information rate O_PIR.
2. method as claimed in claim 2, is characterized in that,
Described committed information rate 0_CIR take ODU0 as least unit, identifies ODUflex bandwidth with N × ODU0;
The highest described information rate O_PIR take ODU0 as least unit, identifies ODUflex bandwidth with M × ODU0;
Described stream attribute IDO_ID represents service priority with O_ID value, and the less service priority of O_ID value is higher;
Described real-time bandwidth BW represents the real-time bandwidth of passage.
3. method as claimed in claim 2, it is characterized in that, described committed information rate 0_CIR, the highest information rate O_PIR, stream attribute IDO_ID and real-time bandwidth BW tetra-bandwidth parameters utilize the RES byte of ODUk expense in OTN frame to define;
Described four bandwidth parameters are specifically defined as at RES byte location and length: in RES byte from left to right, the 1st, 2 bytes be used for described committed information rate O_CIR byte; 3rd, 4 bytes are used for the highest described information rate O_PIR byte; 5th byte is used for described stream attribute IDO_ID byte; 6th byte is used for described real-time bandwidth BW byte.
4. method as claimed in claim 3, it is characterized in that, described committed information rate O_CIR byte is specifically defined as:
1st byte of RES byte and the 1st of the 2nd byte are defined as the reserved place RES_1 of described committed information rate O_CIR from left to right; The 2nd to the 8th of 2nd byte is defined as the ODU0 cascade number mark CIR_ID of described committed information rate O_CIR bandwidth;
Wherein, described CIR_ID span is that 0 to 127, CIR_ID value gets 0 for without engagement information rate 0_CIR guaranteed bandwidth.
5. method as claimed in claim 3, it is characterized in that, the highest described information rate O_PIR byte is specifically defined as:
From left to right for the 3rd byte of RES byte and the 1st of the 4th byte be defined as described in the reserved place RES_2 of the highest information rate O_PIR, the ODU0 cascade number mark PIR_ID of the highest information rate O_PIR bandwidth described in the 2nd to the 8th of the 4th byte is defined as;
Wherein, described PIR_ID span is 1 to 127, and " 0000000 " is invalid value, and PIR_ID value must be greater than 0.
6. method as claimed in claim 3, is characterized in that, being specifically defined as of described stream attribute IDO_ID byte:
High 4 reserved place RES_3 being defined as described stream attribute IDO_ID of the 5th byte of described RES byte, low 4 are defined as priority level progression;
Wherein, described stream attribute IDO_ID span is 0 to 15, and " 0000 " is limit priority, and " 1111 " are lowest priority.
7. method as claimed in claim 3, it is characterized in that, the ODU0 cascade number of the highest information rate O_PIR bandwidth described in described real-time bandwidth BW byte is specifically defined as, value is 1-225, and " 00000000 " is invalid value, and real-time bandwidth BW must be greater than 0.
8. method as claimed in claim 6, it is characterized in that, described real-time bandwidth BW take ODU0 as smallest particles, in OTN frame, periodically real-time bandwidth BW bandwidth value is carried when MFAS value is the integral multiple of 16, equipment is automatically according to real-time bandwidth BW bandwidth value adjustment ODUflex bandwidth chahnel, meanwhile, follow O_CIR and O_PIR to limit bandwidth.
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