CN103634188B - Method, OTN device and system for processing POS port - Google Patents
Method, OTN device and system for processing POS port Download PDFInfo
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- CN103634188B CN103634188B CN201210304161.0A CN201210304161A CN103634188B CN 103634188 B CN103634188 B CN 103634188B CN 201210304161 A CN201210304161 A CN 201210304161A CN 103634188 B CN103634188 B CN 103634188B
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Abstract
The invention discloses a method, OTN device and system for processing a POS port. The method is characterized by detecting whether a user-side signal is a SDH frame; if the user-side signal is the SDH frame, and when the configuration is direct packaging or the configuration is non-direct packaging and the payload of the SDH frame is a non-IP datagram, carrying out overhead processing on the SDH frame and the processing is done based on the conventional OTN mode; when the configuration is non-direct packaging and the payload of the SDH frame is an IP datagram, carrying out decapsulation on the SDH frame, removing filling data in the POS packaging and processing SDH overhead, and thus the IP datagram is obtained; and performing Ethernet frame packaging and a two-layer switch processing on the IP datagram and the processing is done based on the conventional OTN mode. According to the method, OTN device and system for processing the POS port, the statistical multiplexing of network bandwidth is realized and the transmission efficiency and bandwidth utilization rate of a network are improved.
Description
Technical field
The present invention relates to the network carrying, more particularly to a kind of process POS（Packet over SDH, the packet based on SDH）
The method of port, OTN（Optical Transport Network, optical transfer network）Equipment and system.
Background technology
IP（Internet Protocol, Internet protocol）It is mainly mutual by bare fibre between the data equipment of Metropolitan Area Network (MAN)
Connection.Following IP Metropolitan Area Network (MAN)s flattening trend becomes clear day by day, and becomes one of future network evolution tendency using OTN fusion carryings, i.e.,
Introducing OTN in MAN backbone network carries out comprehensive carrying.
When OTN carries different business, the processing mode for being encapsulated into OTN networks is different.Specially：
For SDH（Synchronous Digital Hierarchy, SDH）Signal, OTN is mapped envelope
Put into ODUk（Optical Channel Data Unit-k, light-path data cell k）, or through VC（Virtual
Container, virtual container）Re-map after intersection and be encapsulated into ODUk；
For ethernet signal, OTN is mapped is encapsulated into ODUk, or re-maps after Layer2 switching and be encapsulated into
ODUk。
Under the scene of OTN is introduced in MAN backbone network, can lead when the POS port of existing IP device is with OTN devices interconnect
The problem for causing network transmission efficiency relatively low, because there are substantial amounts of filling data in the SDH frames of POS encapsulation, and tradition OTN equipment
Will be to SDH frames（Including filling data）Directly carry out mapping encapsulation process.
At present data equipment is direct-connected by bare fibre, is such as carried using the OTN equipment of conventional package processing mode, as
The POS port or ethernet port of the data equipment of OTN two ends user side must be identical, will otherwise cause POS port and ether
Net port cannot realize intercommunication on OTN.
The content of the invention
In view of more than, the present invention proposes a kind of method of process POS port, OTN equipment and system.
According to an aspect of the present invention, the method that OTN equipment processes POS port is proposed.Wherein：（1）Detection user side signal
Whether it is SDH（SDH）Frame, if it is, performing（2）, otherwise, abandon the user side signal for receiving；（2）Judge
Whether directly encapsulation is configured to, if it is, performing（6）；Otherwise, perform（3）；（3）Judge whether payload is IP data in SDH frames
Report, if it is, performing（4）, otherwise, perform（6）；（4）SDH frames are decapsulated, is removed based on the packet of SDH（POS）Envelope
Filling data and process SDH expenses in dress, obtain IP datagram；（5）Ethernet frame encapsulation is carried out to IP datagram, and to institute
Stating ethernet frame carries out Layer2 switching process；（6）According to existing optical transfer network（OTN）Pattern is processed.
Further, the method for processing POS port, wherein,（7）Whether detection line-side signal is OTN frames, if
It is to perform（8）, otherwise, abandon the line-side signal for receiving；（8）Decapsulation process is carried out to OTN frames, is performed（9）；（9）Sentence
Whether the signal after disconnected decapsulation is ethernet frame, if it is, performing（10）, otherwise, perform（11）；（10）Through Layer2 switching
Process and POS encapsulation process, perform（12）；（11）Detect whether as SDH frames, if it is, performing（12）, otherwise, abandon line
Trackside signal；（12）Overhead processing is carried out to SDH frames and is sent from port.
Further, the method for processing POS port, wherein, methods described also directly encapsulates multi-service transport platform
（MSTP）SDH frames in network, realize OTN networks and MSTP network interworkings.
According to a further aspect of the invention, it is also proposed that process the OTN equipment of POS port, it is characterised in that including synchronous digital
System（SDH）Frame detection process mould, SDH frame encapsulation/decapsulation modules, Layer2 switching processing module and optical transfer network（OTN）
Encapsulation/decapsulation module：The SDH frames detection process module is configured at whether detection user side signal is SDH frames, if user
Side signal is SDH frames, and when being configured to directly encapsulation, or it is non-IP datagram to be configured to payload in non-immediate encapsulation and SDH frames, right
SDH frames carry out overhead processing, and SDH frames are routed directly to into the OTN encapsulation/decapsulation module；When be configured to it is non-immediate encapsulation and
Payload is IP datagram in SDH frames, then SDH frames are sent to into the SDH frames encapsulation/decapsulation module；The SDH frames encapsulation/solution
Package module is configured at and SDH frames is decapsulated, and removes based on the packet of SDH（POS）Filling data and process in encapsulation
SDH expenses, obtain IP datagram, and to IP datagram ethernet frame encapsulation is carried out, and are sent to Layer2 switching processing module；Described two layers
Exchange processing module is configured at carries out Layer2 switching process to ethernet frame, is sent to OTN encapsulation/decapsulation module；The OTN envelopes
Dress/decapsulation module is configured at enters OTN frames by user side signal assemble.
Further, the OTN equipment for processing POS port, wherein, the OTN encapsulation/decapsulation modules detect line side
Whether signal is OTN frames, if OTN frames, the OTN frames deblocking of line-side signal is dressed up into user side signal.Judge decapsulation
Whether signal afterwards is ethernet frame, if ethernet frame, then Layer2 switching processing module is sent to, if not Ethernet
Frame, then be sent to SDH frame detection process modules；The Layer2 switching processing module carries out Layer2 switching process to ethernet frame, send
Toward SDH frame encapsulation/decapsulation module；Ethernet frame is carried out the SDH frames encapsulation/decapsulation module POS envelopes of SDH frame formats
Dress, is sent to SDH frame detection process modules；The SDH frames detection process module detected whether as SDH frames, if SDH frames, then
SDH expenses are processed, and is sent from port.
Further, the OTN equipment for processing POS port, wherein, the OTN encapsulation/decapsulation modules are also directly encapsulated
Multi-service transport platform（MSTP）SDH frames in network, realize OTN networks and MSTP network interworkings.
According to a further aspect of the invention, it is also proposed that the system for processing POS port, including any of the above-described process POS terminal
The OTN equipment of mouth.
The present invention makes the type of service being packaged into inside SDH frames that OTN equipment is received according to system configuration and detection
Judged, selected suitable OTN processing modes.So as to realize the statistic multiplexing to the network bandwidth, the transmission effect of network is improved
Rate and bandwidth availability ratio.Also, what the present invention can also realize OTN user sides POS port and ethernet port is adapted to intercommunication.
Description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is that the present invention processes POS port to the method flow diagram of OTN frames.
Fig. 2 is that the present invention processes OTN frames to the method flow diagram of POS port.
Fig. 3 is the structural representation of the OTN equipment that the present invention processes POS port.
Specific embodiment
Describe the various exemplary embodiments of the present invention in detail now with reference to accompanying drawing.It should be noted that：Unless had in addition
Body illustrates that the part for otherwise illustrating in these embodiments and the positioned opposite and numerical value of step are not limited the scope of the invention.
Simultaneously, it should be appreciated that for the ease of description, the size of the various pieces shown in accompanying drawing is not according to reality
Proportionate relationship draw.
It is below illustrative to the description only actually of at least one exemplary embodiment, never as to the present invention
And its any restriction applied or use.
For technology, method and apparatus may be not discussed in detail known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered the part for authorizing description.
In all examples shown here and discussion, any occurrence should be construed as merely exemplary, and not
It is as restriction.Therefore, the other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it need not be further discussed in subsequent accompanying drawing.
Fig. 1 is that the present invention processes POS port to the method flow diagram of OTN frames.The flow process is based on user side signal, concrete bag
Include following steps：
Whether S101, detection user side signal are SDH frames, if it is, performing S102, otherwise, abandon the user for receiving
Side signal.
S102, judge whether to be configured to directly encapsulation, if it is, performing S106；Otherwise, S103 is performed.
S103, judge whether payload is IP datagram in SDH frames, if it is, performing S104, otherwise, perform S106.
S104, SDH frames are decapsulated, remove the filling data in POS encapsulation and process SDH expenses, obtain IP numbers
According to report.
IP datagram in SDH expenses and filling data, i.e. SDH frames is added with when being encapsulated into IP datagram in SDH frames
Outside data be exactly SDH expenses and filling data.SDH expenses include section overhead RSOH（RSOH）、MSOH（Multiplex section
Expense）, path overhead HPOH（Higher Order Path Overhead）、LPOH（Lower order path overhead）Deng.Because SDH is constant bit-rate,
And the IP datagram for encapsulating is burst type, data rate can change, so have filling data existing.
S105, Ethernet encapsulation is carried out to IP datagram, obtain ethernet frame, and Layer2 switching is carried out to the ethernet frame
Process.Layer2 switching process is prior art, is exactly the work that switch does, and carries out turning based on ethernet frame and VLAN
Send out etc. science and engineering make.
S106, processed according to existing OTN patterns, i.e., the process of standard definition is carried out to ethernet frame or SDH frames.
Fig. 2 is that the present invention processes OTN frames to the method flow diagram of POS port.The flow process is based on line-side signal, concrete bag
Include following steps：
Whether S201, detection line-side signal are OTN frames, if it is, performing S202, otherwise, abandon the circuit for receiving
Side signal.
S202, decapsulation process is carried out to OTN frames, perform S203.
S203, judge decapsulate after signal whether be ethernet frame, if it is, perform S204, otherwise, perform S205.
S204, through Layer2 switching process and POS encapsulation process, perform S206.
S205, detect whether as SDH frames, if it is, performing S206, otherwise, abandon line-side signal.
S206, SDH frames are carried out overhead processing and from port send.Can be POS port can also be SDH ports, root
Depending on practical application.
Fig. 3 is the structural representation of the OTN equipment that the present invention processes POS port.The OTN equipment includes：At SDH frame detections
Reason mould, SDH frame encapsulation/decapsulation modules, Layer2 switching processing module and OTN encapsulation/decapsulation module.
The system that the present invention processes POS port, including process the OTN equipment of POS port.
The process of OTN equipment process user side signal will be respectively directed to below（First embodiment）And process circuit
The process of side signal（Second embodiment）Illustrate.
First embodiment
SDH frame detection process module detects the SDH frame formats of user side signal（SDH frame formats are marked by ITU-T
Standardization）, to judge whether user side signal is SDH frames.If not SDH frames, then the use for receiving is reported an error and abandoned to system
Family side signal.If SDH frames, then whether inquiry system is configured to directly encapsulation, right if system configuration is directly to encapsulate
SDH frames are carried out after overhead processing（The process of SDH frame overheads is all identical, the Link State transmission for mainly indicating expense
To in the encapsulation overhead of OTN）, SDH frames are routed directly to into OTN encapsulation/decapsulation module.If system configuration is non-immediate envelope
Dress, then detect to the load in SDH frames, that is, judge whether payload is IP datagram in SDH frames（By detecting POS encapsulation
Specific format determining whether payload is IP datagram）.If being non-IP datagram, SDH frames are carried out after overhead processing,
SDH frames are routed directly to into OTN encapsulation/decapsulation module.If IP datagram, then SDH frames are sent to into SDH frames encapsulation/deblocking
Die-filling piece.
SDH frame encapsulation/decapsulation modules are configured at and SDH frames are decapsulated, remove POS encapsulation in filling data and
SDH expenses are processed, IP datagram is obtained, ethernet frame encapsulation is carried out to IP datagram, be sent to Layer2 switching processing module.
Layer2 switching processing module is configured at carries out Layer2 switching process to ethernet frame, be sent to OTN encapsulate/unseal it is die-filling
Block.
OTN encapsulation/decapsulation modules are configured at enters OTN frames by user side signal assemble, i.e., carry out according to existing OTN patterns
Process.
Present invention is generally directed to the POS port that at present carrier network is generally adopted and design, be related to current OTN equipment
SDH frame processing modes be improved.Filling data and process SDH expenses in by removing POS encapsulation, improve OTN networks
The efficiency of router POS port signal is carried, the statistic multiplexing to the network bandwidth is realized, the transmission efficiency and bandwidth of network is improved
Utilization rate, lowers network construction cost.Fill data is to the meaning of transmission efficiency and bandwidth availability ratio, after SDH encapsulation, no
It is how many by actually active data, the bandwidth of occupancy is fixed, and directly encapsulates IP datagram, that is, fill data, is occupied
Bandwidth is related to valid data.Therefore, in the case where identical valid data are transmitted, directly encapsulation IP datagram can reduce right
The occupancy of the network bandwidth, improves the transmission efficiency and bandwidth availability ratio of network.
Second embodiment
Whether OTN encapsulation/decapsulation modules detect the OTN frame formats of line-side signal, to judge line-side signal as OTN
Frame.If not OTN frames, then the line-side signal for receiving is reported an error and abandoned to system.If OTN frames, line side is believed
Number OTN frames deblocking dress up user side signal.Judge whether the signal after decapsulating is ethernet frame, if ethernet frame,
Layer2 switching processing module is then sent to, if not ethernet frame（Possibly SDH frames, because there is direct encapsulation mode, i.e., directly
Connect and SDH frames are encapsulated in OTN frames, be exactly SDH frames after corresponding OTN frames decapsulation）, then it is sent to SDH frame detection process modules.
Layer2 switching processing module carries out Layer2 switching process to ethernet frame, is sent to SDH frames encapsulation/decapsulation module.
Ethernet frame is carried out SDH frames encapsulation/decapsulation module the POS encapsulation of SDH frame formats（The mistake of POS encapsulation process
Journey has had standardized）, it is sent to SDH frame detection process modules.
SDH frame detection process modules detect whether for SDH frames, if SDH frames, then to process SDH expenses, and from
Port sends.If not SDH frames, then line-side signal is abandoned.
At present data equipment is direct-connected by bare fibre, is such as carried using the OTN equipment of conventional package processing mode, as
The POS port or ethernet port of the data equipment of OTN two ends user side must be identical, will otherwise cause POS port and ether
Net port cannot realize intercommunication on OTN.
In the inventive method flow process, S104 ~ S105 and S203 ~ S204 are changed to POS port with ethernet port,
The conversion operation is performed by SDH frame encapsulation/decapsulation modules in OTN equipment.Here port translation is for network
, i.e., local POS port realizes the direct encapsulation of IP datagram after being processed, can solve when decapsulation to opposite equip.
Into Ethernet encapsulation, that is, port translation is realized, realize that POS port is adapted to intercommunication with ethernet port on OTN networks.
OTN equipment proposed by the present invention processes the mechanism of POS port, can be also used for OTN networks and MSTP（Multi-
Service Transport Platform, multi-service transport platform）Network interworking.In method flow, flow process shown in Fig. 1
It is input into as SDH frames, is output as OTN frames, the input of flow process shown in Fig. 2 is OTN frames, is output as SDH frames.By OTN in OTN equipment
Encapsulation/decapsulation module directly encapsulates the SDH frames in MSTP networks, then it represents that two throw the net network using OTN carry MSTP pattern.
That is, the present invention can apply to Metropolitan Area Network (MAN) to the processing method of POS port, it is also possible to be applied to MSTP networks.It is applied to metropolitan area
The port intercommunication of net be the network interworking that MSTP is applied to from the point of view of equipment aspect from the point of view of network level, i.e., port is mutual
Leading to can realize network interworking, the relation that certain logic level is still carried in network level.
So far, the present invention is described in detail.In order to avoid the design of the masking present invention, this area institute is not described public
Some details known.Those skilled in the art can be appreciated how to implement technology disclosed herein as described above, completely
Scheme.
The method of the present invention and device may be achieved in many ways.For example, can by software, hardware, firmware or
Person's software, hardware, any combinations of firmware are realizing the method for the present invention and device.For above-mentioned the step of methods described
Order is not limited to order described in detail above merely to illustrate, the step of the method for the present invention, unless with other sides
Formula is illustrated.Additionally, in certain embodiments, also the present invention can be embodied as recording program in the recording medium, these
Program includes the machine readable instructions for realizing the method according to the invention.Thus, the present invention also covers storage for performing
The recording medium of the program of the method according to the invention.
Although being described in detail to some specific embodiments of the present invention by example, the skill of this area
Art personnel it should be understood that above example is merely to illustrate, rather than in order to limit the scope of the present invention.The skill of this area
Art personnel to above example it should be understood that can modify without departing from the scope and spirit of the present invention.This
Bright scope is defined by the following claims.
Claims (7)
1. the method for processing POS port, it is characterised in that：
(1) detect whether user side signal is SDH SDH frames, if it is, (2) are performed, otherwise, what discarding was received
User side signal；
(2) judge whether to be configured to directly encapsulation, if it is, performing (6)；Otherwise, (3) are performed；
(3) judge whether payload is IP datagram in SDH frames, if it is, performing (4), otherwise, perform (6)；
(4) SDH frames are decapsulated, removes the filling data in the packet POS encapsulation based on SDH and process SDH expenses, obtained
To IP datagram；
(5) ethernet frame encapsulation is carried out to IP datagram, and Layer2 switching process is carried out to the ethernet frame；
(6) processed according to existing optical transfer network OTN patterns.
2. the method for processing POS port as claimed in claim 1, it is characterised in that：
(7) detect whether line-side signal is OTN frames, if it is, performing (8), otherwise, abandon the line-side signal for receiving；
(8) decapsulation process is carried out to OTN frames, is performed (9)；
(9) judge whether the signal after decapsulating is ethernet frame, if it is, performing (10), otherwise, perform (11)；
(10) through Layer2 switching process and POS encapsulation process, perform (12)；
(11) detect whether as SDH frames, if it is, performing (12), otherwise, abandon line-side signal；
(12) overhead processing is carried out to SDH frames and is sent from port.
3. the method for processing POS port as claimed in claim 1 or 2, it is characterised in that：Methods described also directly encapsulates multi-service
SDH frames in delivery platform MSTP networks, realize OTN networks and MSTP network interworkings.
4. the OTN equipment of POS port is processed, it is characterised in that including SDH SDH frame detection process moulds, SDH frames envelope
Dress/decapsulation module, Layer2 switching processing module and optical transfer network OTN encapsulation/decapsulation module：
The SDH frames detection process module is configured at whether detection user side signal is SDH frames, if user side signal is SDH
Frame, when being configured to directly encapsulation, or it is non-IP datagram to be configured to payload in non-immediate encapsulation and SDH frames, and SDH frames are opened
Pin process, by SDH frames the OTN encapsulation/decapsulation module is routed directly to；The payload in non-immediate encapsulation and SDH frames is configured to
For IP datagram, then SDH frames are sent to into the SDH frames encapsulation/decapsulation module；
The SDH frames encapsulation/decapsulation module is configured at and SDH frames is decapsulated, and removes the packet POS based on SDH and encapsulates
In filling data and process SDH expenses, obtain IP datagram, ethernet frame encapsulation is carried out to IP datagram, be sent to two layers of friendship
Change processing module；
The Layer2 switching processing module is configured at and carries out Layer2 switching process to ethernet frame, be sent to OTN encapsulate/unseal it is die-filling
Block；
OTN encapsulation/the decapsulation modules are configured at enters OTN frames by user side signal assemble.
5. the OTN equipment of POS port is processed as claimed in claim 4, it is characterised in that：
Whether the OTN encapsulation/decapsulation modules detection line-side signal is OTN frames, if OTN frames, by line-side signal
OTN frames deblocking dress up user side signal；Judge whether the signal after decapsulating is ethernet frame, if ethernet frame, then
Layer2 switching processing module is sent to, if not ethernet frame, then SDH frame detection process modules is sent to；
The Layer2 switching processing module carries out Layer2 switching process to ethernet frame, is sent to SDH frames encapsulation/decapsulation module；
Ethernet frame is carried out the SDH frames encapsulation/decapsulation module POS encapsulation of SDH frame formats, is sent at SDH frame detections
Reason module；
The SDH frames detection process module detects whether for SDH frames, if SDH frames, then to process SDH expenses, and from
Port sends.
6. the OTN equipment of POS port is processed as claimed in claim 4, it is characterised in that：
OTN encapsulation/the decapsulation modules also directly encapsulate the SDH frames in multi-service transport platform MSTP network, realize OTN nets
Network and MSTP network interworkings.
7. the system for processing POS port, including the OTN equipment that POS port is processed as described in claim 4 to 6 is arbitrary.
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| CN201210304161.0A CN103634188B (en) | 2012-08-24 | 2012-08-24 | Method, OTN device and system for processing POS port |
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| CN201210304161.0A CN103634188B (en) | 2012-08-24 | 2012-08-24 | Method, OTN device and system for processing POS port |
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| CN103634188B true CN103634188B (en) | 2017-04-12 |
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| CN106452993B (en) * | 2016-09-22 | 2019-07-30 | 南京中新赛克科技有限责任公司 | A kind of method of high density POS data access network based on ethernet |
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| CN101729935A (en) * | 2008-10-27 | 2010-06-09 | 华为技术有限公司 | Service data transmission methods and devices |
| CN101815024A (en) * | 2010-03-24 | 2010-08-25 | 中兴通讯股份有限公司 | Ethernet service intercommunication method and device |
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| US20020176450A1 (en) * | 2001-01-31 | 2002-11-28 | Sycamore Networks, Inc. | System and methods for selectively transmitting ethernet traffic over SONET/SDH optical network |
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|---|---|---|---|---|
| CN1575560A (en) * | 2001-08-24 | 2005-02-02 | 朗米·S·冈达 | Method and apparaturs for translating sdh/sonet frames to Ethernet frames |
| CN101729935A (en) * | 2008-10-27 | 2010-06-09 | 华为技术有限公司 | Service data transmission methods and devices |
| CN101621485A (en) * | 2009-08-07 | 2010-01-06 | 中兴通讯股份有限公司 | Device and method for compatibly realizing grouping transmission service and time division multiplexing (TDM) service |
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