CN101867849A - Gigabit passive optical network system multiple protocols bearing method and encapsulation mode frame thereof - Google Patents
Gigabit passive optical network system multiple protocols bearing method and encapsulation mode frame thereof Download PDFInfo
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- CN101867849A CN101867849A CN200910137410A CN200910137410A CN101867849A CN 101867849 A CN101867849 A CN 101867849A CN 200910137410 A CN200910137410 A CN 200910137410A CN 200910137410 A CN200910137410 A CN 200910137410A CN 101867849 A CN101867849 A CN 101867849A
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Abstract
The invention provides a Gigabit passive optical network system multiple protocols bearing method. The system side and the terminal side encapsulate data into Gigabit passive optical network encapsulation mode GEM frame to be transmitted, the GEM frame contains a payload type indication field and a payload field, and GEM frame born data indicated by the payload type indication field includes physical layer management PLOAM data, optical network unit management configuration OMCI data and service data. The invention also provides a GEM frame. The invention expands function of control layer and data layer on the basis of the current Gigabit passive optical network standard technique and realizes that Gigabit passive optical network system bears multiple protocols in one GEM port channel.
Description
Technical field
The present invention relates to GPON (Gigabit Passive Optical Network, gigabit passive optical network) field, in particular, be the method and the encapsulation mode frame of a GEM (GPON Encapsulation Method, G-PON Encapsulation Mode) port passage loading multi-protocols in a kind of GPON system.
Background technology
GPON is based on the G.984.x new generation broadband passive light access technology of standard of ITU-T (standardization department of international telecommunication union telecommunication), the GPON system is usually by OLT (the Optical Line Terminal of office's side, optical line terminal), the ONU of user side (Optical Network Unit, optical network unit)/ONT (Optical Network Termination, Optical Network Terminal) and ODN (Optical Distribution Network, Optical Distribution Network) forms, ONT is a kind of of ONU, and the ONU that hereinafter mentions all comprises the situation that ONU is ONT.ODN is made up of Passive Optical Components such as monomode fiber and optical branching device, optical connectors, for the physical connection between OLT and the ONU provides light-transmitting medium.ODN is generally and a little arrives multipoint configuration, and promptly an OLT connects a plurality of ONU.The data that OLT mails to ONU are called downlink data, and the data that ONU mails to OLT are called upstream data.
The payload part of GPON system uplink/downlink frames is GEM (GPON Encapsulation Method, a G-PON Encapsulation Mode) frame.The GEM frame format is as shown in Figure 1:
The GEM frame head is by payload length indication (Payload Length Indicator, PLI), port-mark (Port ID), payload type indication (Payload Type Indicator, PTI) and the HEC of 13bit (Head Error Control, a verification) form.PLI is the payload section length L of unit indication frame head back with the byte.Port ID is used to provide 4096 different traffic stream identifier among the PON (EPON), and is multiplexing to realize Business Stream.The PTI territory is used to indicate the content type and the corresponding processing mode of payload section, and the coding implication is seen accompanying drawing 2.Wherein, PTI is encoded at 000 o'clock, and indication carrying " user data segment; be not postamble " is 001 o'clock, indication carrying " user data segment; be postamble ", be 100 o'clock, indication carrying " GEM OAM (operation management maintain) data are not postambles ", it is 101 o'clock, indication carrying " GEM OAM data are postambles ", all the other reservations of encoding.
So far, the GPON standard technique can only be carried a kind of agreement uniquely in each GEM port passage, promptly single protocol mode.Concrete agreement can comprise Ethernet Ethernet, SDH (Synchronized Digital Hierarchy, Synchronous Digital Hierarchy), IP (Internet Protocol, Internet Protocol), TDM (Time Division Multiplexing, time division multiplexing) etc.As shown in Figure 3 and Figure 4.Among the figure, each protocol stack comprises GPON PMD (physical medium is relevant) layer, GTC (GPON Transmission Convergence) layer and client layer, and among Fig. 3, client layer is the SDH layer, among Fig. 4, client layer is the IP layer.The GTC layer becomes the GEM frame with data encapsulation.The method of carrying is a kind of transparent way, and promptly the protocol data bag directly is inserted in the payload section of GEM.
This single protocol mode has significant limitation: be accompanied by the raising of light shunt than number, be becoming tight (the GPON system has only 4096 GEM port) of GEM port number of resources, and MDU (Multi Dwell Unit, multitenant unit) a large amount of deployment of the ONU of type, GEM port can only carry a kind of defective of agreement can be more and more outstanding.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of method and encapsulation mode frame of gigabit passive optical network system multiple protocols bearing is provided, and solves existing GEM port and can only carry a kind of agreement, the problem that inapplicable GPON systematic large-scale is used.
In order to solve the problems of the technologies described above, the invention provides a kind of gigabit passive optical network
SystemThe method of loading multi-protocols, described system side and end side are transmitted data encapsulation in Gigabit passive optical network packaging mode GEM frame, described GEM frame comprises payload type indication field, payload section, and described indication field is indicated current GEM frame data carried by data type.
Further, said method also can have following characteristics, and the GEM frame bearer data type of indication field indication includes but not limited to physical layer management (PLOAM), ONU administration configuration (OMCI) and traffic data type.Traffic data type comprises Ethernet, Internet Protocol (IP), Time Division Multiplexing etc.
Further, said method also can have following characteristics, and how OLT or ONU handle payload according to the GEM frame payload type indication field decision that receives.
The present invention also proposes a kind of Gbit passive optical network system encapsulation mode frame, comprise payload length indication field, port-mark field, payload type indication field, a check field and payload section, described payload type indication field is indicated current GEM frame data carried by data type.
Further, above-mentioned Gigabit passive optical network packaging mode frame also can have following characteristics, the GEM frame bearer data type of described payload type indication field indication includes but not limited to physical layer management (PLOAM), ONU administration configuration (OMCI) and traffic data type.Traffic data type comprises Ethernet, Internet Protocol (IP), Time Division Multiplexing etc.
The present invention is by carrying out function expansion to the data aspect on the basis of current GPON standard technique, realized that the GPON system carries the ability of various protocols in a GEM port passage.
Description of drawings
Fig. 1 is the GEM frame format that G.984.3 ITU-T stipulates.
Fig. 2 is the GEM frame head pti field coding schedule that G.984.3 ITU-T stipulates.
Fig. 3 is a GPON carrying SDH agreement schematic diagram.
Fig. 4 is a GPON carrying IP agreement schematic diagram.
Fig. 5 is a kind of encapsulation format frame schematic diagram of PON of the present invention.
Fig. 6 is a kind of encapsulation format frame schematic diagram of PON of the present invention.
Embodiment
The invention provides a kind of method of gigabit passive optical network system multiple protocols bearing, specifically comprise:
On data plane:
The invention provides a kind of method of gigabit passive optical network loading multi-protocols, described system side and end side are transmitted data encapsulation in Gigabit passive optical network packaging mode GEM frame, described GEM frame comprises payload type indication field, payload section, and described indication field is indicated current GEM frame data carried by data type.
The GEM frame bearer data type of indication field indication comprises physical layer management (PLOAM), ONU administration configuration (OMCI) and user data type.The user data type comprises Ethernet, Internet Protocol (IP), Time Division Multiplexing etc.
How OLT or ONU handle payload according to the GEM frame payload type indication field decision that receives.
Transmitting terminal encapsulates according to the protocol type of GEM carrying, comprises the payload indication field in the encapsulation.
When the payload type indication field was OMCI, receiving terminal need be handled according to the agreement of OMCI, and when payload was PLOAM, receiving terminal need be handled according to the requirement of PLOAM.
In order to indicate payload is the sort of type, and following method is arranged:
1, the payload indication field can be distinguished PLOAM, OMCI and miscellaneous service data, and business datum comprises Ethernet, IP, TDM etc.
A) 0 sign PLOAM,,
B) 1 sign OMCI,
C) 2 sign Ethernet
D) 3 sign TDM
E) 4 sign SDH
2, the payload indication field can be distinguished PLOAM, OMCI, and business datum, and provide other territory (OPTION) to indicate further information.
As: for PLOAM, can use other territory (Option) to show type of message, also can not use other territory.
For OMCI, can use other territory (Option) to show message identifier, also can not use other territory.
For business datum, can use other territory (Option) to show it specifically is the data of the sort of type, comprise Ethernet, IP, TDM etc.
The payload indication field is placed in the GEM encapsulation header, and the Option field can be placed on head, also can put into payload.
At the unique corresponding cover ident value collection of each protocol definition, be used to identify the concrete protocol type of distinguishing this GEM frame carrying.
Below in conjunction with accompanying drawing GEM frame loading multi-protocols of the present invention is described.
During GEM port loading multi-protocols, transmitting terminal encapsulates according to the protocol type of GEM carrying, comprise the payload indication field in the encapsulation, how OLT or ONU handle payload according to the GEM frame payload type indication field decision that receives, payload indication field (PTI), can design as shown in Figure 5, can directly indicate is the payload of the sort of type, and relevant carrying data are put into payload.Also can be as shown in Figure 6, the PTI indication is PLOAM, OMCI or business datum, Option indicates further information to comprise:
For PLOAM, can use other territory to show type of message
For OMCI, can use other territory to show message identifier
For business datum, can use other territory to show specifically is the data of the sort of type, comprises Ethernet, IP, TDM etc.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the method for a gigabit passive optical network system multiple protocols bearing, system side and end side are transmitted data encapsulation in Gigabit passive optical network packaging mode GEM frame, described GEM frame comprises payload type indication field, payload section, it is characterized in that described payload type indication field is indicated the data type of the payload of described current GEM frame carrying.
2. the method for claim 1 is characterized in that, the GEM frame bearer data type of described payload type indication field indication comprises physical layer management PLOAM, optical network unit management configuration OMCI and traffic data type.
3. method as claimed in claim 2 is characterized in that described traffic data type comprises Ethernet, Internet Protocol IP, time division multiplexing tdm.
4. the method for claim 1 is characterized in that, how optical line terminal OLT or optical network unit ONU handle payload according to the described GEM frame payload type indication field decision that receives.
5. Gbit passive optical network system encapsulation mode frame, comprise payload length indication field, port-mark field, payload type indication field, a check field and/or payload section, it is characterized in that described payload type indication field is indicated current GEM frame data carried by data type.
6. Gigabit passive optical network packaging mode frame as claimed in claim 5 is characterized in that, the GEM frame bearer data type of described payload type indication field indication comprises physical layer management PLOAM, ONU administration configuration OMCI and traffic data type.
7. Gigabit passive optical network packaging mode frame as claimed in claim 6 is characterized in that described traffic data type comprises Ethernet, Internet Protocol IP, time division multiplexing tdm.
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| WO2015139412A1 (en) * | 2014-03-19 | 2015-09-24 | 华为技术有限公司 | Communication method, communication apparatus, and communication system |
| CN113973239A (en) * | 2020-07-24 | 2022-01-25 | 上海诺基亚贝尔股份有限公司 | Method, apparatus, optical network unit, optical line terminal and medium for communication |
| WO2024041278A1 (en) * | 2022-08-25 | 2024-02-29 | 中兴通讯股份有限公司 | Communication method and system, electronic device, and computer-readable medium |
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| CN101198190A (en) * | 2008-01-03 | 2008-06-11 | 中兴通讯股份有限公司 | Calibration method for Gigabit passive optical network packaging mode frame user data |
| CN101212821A (en) * | 2006-12-26 | 2008-07-02 | 冲电气工业株式会社 | Resourceless light network signal processing device, signal processing method and GTC frame |
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| CN101192886A (en) * | 2006-11-29 | 2008-06-04 | 中兴通讯股份有限公司 | Service management method for Gbit passive optical network |
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| WO2015139412A1 (en) * | 2014-03-19 | 2015-09-24 | 华为技术有限公司 | Communication method, communication apparatus, and communication system |
| CN113973239A (en) * | 2020-07-24 | 2022-01-25 | 上海诺基亚贝尔股份有限公司 | Method, apparatus, optical network unit, optical line terminal and medium for communication |
| WO2024041278A1 (en) * | 2022-08-25 | 2024-02-29 | 中兴通讯股份有限公司 | Communication method and system, electronic device, and computer-readable medium |
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Application publication date: 20101020 |