CN101616339A - The method of gigabit passive optical network system multiple protocols bearing and encapsulation mode frame - Google Patents
The method of gigabit passive optical network system multiple protocols bearing and encapsulation mode frame Download PDFInfo
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Abstract
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 pti field, payload section, it is single agreement user data segment or multi-protocols user data segment that described pti field is indicated described payload section, when described pti field indicates described payload section to be the multi-protocols user data segment, described GEM frame also comprises protocol identification field, indicates the protocol type of current GEM frame carrying.The present invention also provides a kind of GEM frame.The present invention has realized that by on the basis of current gigabit passive optical network standard technique control aspect and data plane being carried out the function expansion Gbit passive optical network system carries the ability of various protocols in a GEM port passage.
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 EncapsulationMethod, 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 LineTerminal 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 DistributionNetwork, 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 (HeadError 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 (SynchronizedDigital Hierarchy, Synchronous Digital Hierarchy), IP (Internet Protocol, Internet Protocol), TDM (TimeDivision 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 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 pti field, payload section, it is single agreement user data segment or multi-protocols user data segment that described pti field is indicated described payload section, when described pti field indicates described payload section to be the multi-protocols user data segment, described GEM frame also comprises protocol identification field, indicates the protocol type of current GEM frame carrying.
Further, said method also can have following characteristics, and described pti field is encoded to 000 or at 001 o'clock, indicates described GEM frame to carry single agreement user data segment.
Further, said method also can have following characteristics, and described pti field is encoded to 010 or at 011 o'clock, indicates described GEM frame loading multi-protocols user data segment.
Further, said method also can have following characteristics, and described pti field is encoded at 010 o'clock, indicating described payload section is the multi-protocols user data segment, is not postamble, and described pti field is encoded at 011 o'clock, indicating described payload section is the multi-protocols user data segment, is postamble.
Further, said method also can have following characteristics, at key-course is that Gigabit passive optical network packaging mode port GEM Port increases the attribute configuration field, and disposing this Gem Port is single protocol mode or multi-protocols pattern, indicates described Gem Port to carry single agreement or multi-protocols respectively.
Further, said method also can have following characteristics, and when described attribute configuration field was 0x00, described GEM Port was single protocol mode, and when described attribute configuration field was 0x01, described GEM Port was the multi-protocols pattern.
The present invention also proposes a kind of Gigabit passive optical network packaging mode frame, comprise payload length indication field, port-mark field, payload type indication field, a check field and payload section, it is single agreement user data segment or multi-protocols user data segment that described payload type indication pti field is indicated described payload section, when described pti field indicates described payload section to be the multi-protocols user data segment, described Gigabit passive optical network packaging mode GEM frame also comprises protocol identification field, indicates the protocol type of current GEM frame carrying.
Further, above-mentioned Gigabit passive optical network packaging mode frame also can have following characteristics, and described pti field is encoded to 000 or at 001 o'clock, and indicating described payload section is single agreement user data segment, described pti field is encoded to 010 or at 011 o'clock, and indicating described payload section is the multi-protocols user data segment.
Further, above-mentioned Gigabit passive optical network packaging mode frame also can have following characteristics, and described PTI is encoded at 010 o'clock, indicating described payload section is the multi-protocols user data segment, is not postamble, and described PTI is encoded at 011 o'clock, indicating described payload section is the multi-protocols user data segment, is postamble.
The present invention is by carrying out the function expansion to control aspect and data plane 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 the GEM frame head pti field coding schedule that G.984.3 the present invention expands ITU-T.
Fig. 6 is a GPON encapsulation format frame schematic diagram of the present invention.
Fig. 7 is a GPON loading multi-protocols schematic diagram of the present invention.
Embodiment
The invention provides a kind of method of gigabit passive optical network system multiple protocols bearing, specifically comprise:
At first, key-course and data Layer are expanded.
On the control aspect:
Expansion OMCI (ONT Management Control Interface, Optical Network Termination Management and Control Interface) increases GEM port about list/multi-protocols pattern attribute field, distinguishes this GEM port and is used to carry single-protocol or various protocols.Under different scenes, list/multi-protocols pattern is configured selection by the OMCI passage to the specific GEM port of ONU by OLT.Can not be configured on the control aspect yet.
On data plane:
1) coding to PTI section carries out as giving a definition, and pti field is used to indicate the single agreement user data segment or the multi-protocols user data segment of payload section carrying, increases the indication about the multi-protocols carrying:
A) be used to indicate this GEM frame to carry single agreement two codings (000,001) in the GEM frame head pti field, wherein:
PTI is encoded at 000 o'clock, expression " carrying the user data segment of single agreement, is not postamble ";
PTI is encoded at 001 o'clock, expression " carrying the user data segment of single agreement, is postamble ".
B) coding (010,011) with two reservations in the GEM frame head pti field is used to indicate this GEM frame loading multi-protocols, wherein:
PTI is encoded at 010 o'clock, expression " user data segment of loading multi-protocols is not a postamble ";
PTI is encoded at 011 o'clock, expression " user data segment of loading multi-protocols is a postamble ".
C) when GEM frame head pti field was encoded to other value, GEM frame head and payload format were stipulated with ITU-TG.984.3.New PTI coding is seen Fig. 5.
Can certainly use coding 110,111 these GEM frame loading multi-protocols of indication of reservation.PTI is encoded at 110 o'clock, expression " user data segment of loading multi-protocols is not a postamble ", and the PTI coding is 111 o'clock, expression " user data segment of loading multi-protocols is a postamble ".In addition, between 010 and 011, the implication between 110 and 111 also can be exchanged, and promptly PTI is encoded at 010 o'clock, and expression " user data segment of loading multi-protocols is a postamble " is 011 o'clock, expression " user data segment of loading multi-protocols is not a postamble ".Do not limit herein.
2) when the GEM frame head is the multi-protocols pattern (pti field is encoded to 010 or 011) increases protocol identification field (prototype) in the GEM frame, before protocol identification field places payload section usually, is the upper-layer protocol data in the payload section.The GEM frame format as shown in Figure 6, the protocol stack of formation is as shown in Figure 7.
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.
GPON OMCI management channels is at the configuration management attribute of one 8 bit of each GEM port increase, and property value can be designated single agreement 0x00, and multi-protocols 0x01 also can be other values, does not add qualification herein.
Needs according to business scenario, when Gem port carries single agreement, use the GEM frame to carry single protocol data pattern, OLT is single protocol mode by this GEM port of OMCI channel arrangement ONU, the GEM frame format and the pti field coding (000,001) that use ITU-T G.984.3 to stipulate on the control aspect and on the data plane.
When Gem port loading multi-protocols, use GEM frame loading multi-protocols data pattern, OLT is the multi-protocols pattern by this GEM port of OMCI channel arrangement ONU, uses the GEM frame format and the pti field coding (010,011) of ITU-TG.984.3 regulation on the data plane.And increase protocol identification field (ProtoType), this fields default is 16 bits.Defining unique corresponding protocols identification number at uploading protocol, is 0x0800 as IP, and PPP (point-to-point protocol) is 0x8863 etc.
Claims (9)
1, a kind of method of gigabit passive optical network loading multi-protocols, 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 pti field, payload section, it is characterized in that, it is single agreement user data segment or multi-protocols user data segment that described pti field is indicated described payload section, when described pti field indicates described payload section to be the multi-protocols user data segment, described GEM frame also comprises protocol identification field, indicates the protocol type of current GEM frame carrying.
2, the method for claim 1 is characterized in that, described pti field is encoded to 000 or at 001 o'clock, indicates described GEM frame to carry single agreement user data segment.
3, the method for claim 1 is characterized in that, described pti field is encoded to 010 or at 011 o'clock, indicates described GEM frame loading multi-protocols user data segment.
4, method as claimed in claim 3 is characterized in that, described pti field is encoded at 010 o'clock, indicating described payload section is the multi-protocols user data segment, is not postamble, and described pti field is encoded at 011 o'clock, indicating described payload section is the multi-protocols user data segment, is postamble.
5, as claim 1,2,3 or 4 described methods, it is characterized in that, at key-course is that Gigabit passive optical network packaging mode port GEM Port increases the attribute configuration field, disposing this Gem Port is single protocol mode or multi-protocols pattern, indicates described Gem Port to carry single agreement or multi-protocols respectively.
6, method as claimed in claim 5 is characterized in that, when described attribute configuration field was 0x00, described GEM Port was single protocol mode, and when described attribute configuration field was 0x01, described GEMPort was the multi-protocols pattern.
7, a kind of Gigabit passive optical network packaging mode frame, comprise payload length indication field, port-mark field, payload type indication field, a check field and payload section, it is characterized in that, it is single agreement user data segment or multi-protocols user data segment that described payload type indication pti field is indicated described payload section, when described pti field indicates described payload section to be the multi-protocols user data segment, described Gigabit passive optical network packaging mode GEM frame also comprises protocol identification field, indicates the protocol type of current GEM frame carrying.
8, Gigabit passive optical network packaging mode frame as claimed in claim 7, it is characterized in that, described pti field is encoded to 000 or at 001 o'clock, indicating described payload section is single agreement user data segment, described pti field is encoded to 010 or at 011 o'clock, and indicating described payload section is the multi-protocols user data segment.
9, Gigabit passive optical network packaging mode frame as claimed in claim 8 is characterized in that, described PTI is encoded at 010 o'clock, indicating described payload section is the multi-protocols user data segment, is not postamble, and described PTI is encoded at 011 o'clock, indicating described payload section is the multi-protocols user data segment, is postamble.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103023613A (en) * | 2012-12-14 | 2013-04-03 | 中兴通讯股份有限公司 | Method and device for checking length of data frame |
| WO2015139412A1 (en) * | 2014-03-19 | 2015-09-24 | 华为技术有限公司 | Communication method, communication apparatus, and communication system |
| WO2019019073A1 (en) * | 2017-07-27 | 2019-01-31 | 华为技术有限公司 | Data processing method, optical line terminal, optical network unit and system |
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2008
- 2008-06-27 CN CN200810126160A patent/CN101616339A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023613A (en) * | 2012-12-14 | 2013-04-03 | 中兴通讯股份有限公司 | Method and device for checking length of data frame |
| CN103023613B (en) * | 2012-12-14 | 2018-06-01 | 中兴通讯股份有限公司 | A kind of method and device verified to data frame length |
| WO2015139412A1 (en) * | 2014-03-19 | 2015-09-24 | 华为技术有限公司 | Communication method, communication apparatus, and communication system |
| CN105981313A (en) * | 2014-03-19 | 2016-09-28 | 华为技术有限公司 | Communication method, communication apparatus, and communication system |
| CN105981313B (en) * | 2014-03-19 | 2018-07-20 | 华为技术有限公司 | A kind of communication means, communication device and communication system |
| WO2019019073A1 (en) * | 2017-07-27 | 2019-01-31 | 华为技术有限公司 | Data processing method, optical line terminal, optical network unit and system |
| CN113038304A (en) * | 2017-07-27 | 2021-06-25 | 华为技术有限公司 | Data processing method, optical line terminal, optical network unit and system |
| CN113038304B (en) * | 2017-07-27 | 2022-08-09 | 华为技术有限公司 | Data processing method, optical line terminal, optical network unit and system |
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Application publication date: 20091230 |