CN101635666B - Method and device for communication between optical line terminal and optical network unit of GPON system - Google Patents
Method and device for communication between optical line terminal and optical network unit of GPON system Download PDFInfo
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- CN101635666B CN101635666B CN200810116929.5A CN200810116929A CN101635666B CN 101635666 B CN101635666 B CN 101635666B CN 200810116929 A CN200810116929 A CN 200810116929A CN 101635666 B CN101635666 B CN 101635666B
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Abstract
The invention provides a method and a device for communication between an optical line terminal OLT and an optical network unit ONU of a GPON system. When the ONU supports multiple connection modes of a service flow and a GEM Port in the prior GPON system, the OLT does not know to manage the ONU according to what kind of connection mode of the service flow and the GEM Port. The method and the device send the connection modes of the service flow and the GEM Port supported by the ONU and/or the current connection mode of the service flow and the GEM Port of the ONU to the OLT by setting a connection mode module and a sending module in the ONU, and the device negotiates with the OLT so as to confirm the connection mode of the service flow and the GEM Port. Therefore, aiming at any type of ONU and OLT, as long as the ONU and the OLT have the same connection mode, the method and the device can realize the communication between the ONU and the OLT without predefining the connection mode after the ONU is accessed.
Description
Technical field
The present invention relates to a kind of GPON (Gigabit-Capable Passive Optical Network, gigabit passive optical network) system optical line terminal (Optical Line Terminal, OLT) with the means of communication and the device of optical network unit (Optical Network Unit, ONU).
Background technology
Optical fiber access is the generally acknowledged broadband access network developing direction of industry, and PON (Optical PassiveNetwork, EPON) is current main optical fiber access technology.Typical PON system is by OLT (Optical Line Terminal, OLT), ODN (Optical Distribution Network, Optical Distribution Network) and ONU (Optical Network Unit, optical network unit) composition.PON system is generally the topology of point-to-multipoint, and an OLT is connected with multiple ONU.ONT (OpticalNetwork Terminal, light network termination device) is the one of ONU.
GPON is one of mainstream technology of PON network, by worldwide multiple operators, is disposed to provide broadband services at present.
According to ITU-T G984 standard-required, user traffic flow enters GPON system while transmitting between OLT and ONU, need to carry out encapsulation/decapsulation according to the GEM frame format of standard, and user traffic flow is transmitted between OLT and ONU as the payload part in GEM frame.In order to distinguish and identify Business Stream dissimilar in GEM frame, GPON agreement regulation is that GEM Port (GEM port) transmits between OLT and ONU by different logical channels after Business Stream is classified, and it is GEM Port ID that each GEM Port has unique sign.Brought thus the problem that adopts which kind of pattern to be connected between many Business Streams and multiple GEM PORT.G.984.4 standard provides plurality of optional pattern for being connected between Business Stream and GEM Port, the management parameters difference under different mode between OLT and ONU.Because OLT and ONU can support wherein any one or various modes, (the multiple ONU that for example connect from OLT support respectively different connection modes, or wherein some ONU supports multiple connection mode), this has just caused OLT not know this according to which kind of Business Stream and GEM Port connection mode manages ONU.
Summary of the invention
For the defect existing in prior art and deficiency, the object of the invention is to propose the means of communication of OLT and ONU in a kind of GPON system, can all support multiple business stream and GEM Port connected mode for OLT and ONU, or wherein a side supports the GPON system of multiple business stream and GEM Port connected mode, mode is through consultation determined the communication mode between OLT and ONU.
In order to achieve the above object, the present invention proposes the device of OLT and ONU communication in a kind of GPON system, it is characterized in that, comprising:
Connection mode module, at least stores Business Stream that this ONU supports and GEM Port connection mode and/or this ONU current Business Stream and GEM Port connection mode in described module;
Sending module, the Business Stream that the connection mode that described sending module is supported this ONU storing in described connection mode module and/or this ONU are current and GEM Port connection mode send to OLT.
As technique scheme preferably, described device also comprises:
Mode selection module, the connection mode that described mode selection module is supported according to described ONU and OLT, the connection mode of selecting a kind of ONU and OLT all to support.
As technique scheme preferably, described connection mode module is arranged in described ONU; Described mode selection module is arranged in described OLT.
As technique scheme preferably, described connection mode module is arranged in the ONT2-G management entity of described ONU.
Meanwhile, the invention allows for the method for OLT and ONU communication in GPON system a kind of, it is characterized in that, comprising:
Step 1, ONU send to OLT by the Business Stream of its support and GEM Port connection mode and/or current Business Stream and the GEM Port connection mode of this ONU;
Step 2, the connection mode of supporting according to described ONU, and the connection mode of described OLT support, the connection mode of selecting a kind of ONU and OLT all to support.
As technique scheme preferably, before step 1, also comprise:
Step 0, arrange with lower module:
Connection mode module, at least stores Business Stream that this ONU supports and GEM Port connection mode and/or this ONU current Business Stream and GEM Port connection mode in described module;
Sending module, the Business Stream that the Business Stream that described sending module is supported this ONU storing in described connection mode module and GEM Port connection mode and/or this ONU are current and GEM Port connection mode send to OLT.
As technique scheme preferably,, described step 0 is specially:
Step 0a, in ONU, arrange with lower module:
Connection mode module, at least stores Business Stream that this ONU supports and GEM Port connection mode and/or this ONU current Business Stream and GEM Port connection mode in described module;
Sending module, the Business Stream that the Business Stream that described sending module is supported this ONU storing in described connection mode module and GEM Port connection mode and/or this ONU are current and GEM Port connection mode send to OLT;
Step 0b, in described OLT, arrange with lower module:
Mode selection module, the connection mode that described mode selection module is supported according to described ONU and OLT, the connection mode of selecting a kind of ONU and OLT all to support, if need also this connection mode to be sent to this ONU, if do not needed, can not send.
As technique scheme preferably, in described step 0a, described connection mode module is arranged in the ONT2-G management entity of this ONU.
The present invention proposes the means of communication and the device of a kind of GPON system OLT and ONU.In existing GPON system, G.984.4 standard provides plurality of optional pattern for being connected between Business Stream and GEMPort, the management parameters difference under different mode between OLT and ONU.Because OLT and ONU can support wherein any one or various modes, (the multiple ONU that for example connect from OLT support respectively different connection modes, or wherein some ONU supports multiple connection mode), this has just caused OLT not know this according to which kind of Business Stream and GEM Port connection mode manages ONU.For this problem, the present invention proposes the means of communication and the device of a kind of GPON system OLT and ONU, by ONU and OLT, consult to determine Business Stream and GEM Port connection mode, like this can be for the ONU of disposable type and OLT, as long as it has identical connection mode, can realize after ONU accesses and not need connection mode to pre-define the communication that just can realize ONU and OLT.
Accompanying drawing explanation
Fig. 1 is the principle schematic of device first preferred embodiment of OLT and ONU communication in the GPON system that proposes of the present invention;
Fig. 2 is the principle schematic of device the 3rd preferred embodiment of OLT and ONU communication in the GPON system that proposes of the present invention;
Fig. 3 is the principle schematic of device the 4th preferred embodiment of OLT and ONU communication in the GPON system that proposes of the present invention;
Fig. 4 is the schematic flow sheet of the method for OLT and ONU communication in the GPON system that proposes of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.For person of ordinary skill in the field, from detailed description of the invention, above and other object of the present invention, feature and advantage will be apparent.
First in conjunction with the device of OLT and ONU communication in the GPON system of Fig. 1,2,3 pairs of the present invention's propositions, describe.
In the GPON system that the present invention proposes, device first preferred embodiment of OLT and ONU communication as shown in Figure 1, comprising:
Connection mode module, at least stores Business Stream that this ONU supports and GEM Port connection mode and/or this ONU current Business Stream and GEM Port connection mode in described module;
Sending module, the Business Stream that the Business Stream that described sending module is supported this ONU storing in described connection mode module and GEM Port connection mode and/or this ONU are current and GEM Port connection mode send to OLT.
In above-mentioned the first preferred embodiment, in connection mode module, store all Business Streams that ONU supports and the connection mode of GEM Port, and/or current Business Stream and the GEMPort connection mode of this ONU.By sending module, these patterns are sent to OLT in due course, and by the pattern that relatively ONU and OLT support respectively, then select a pattern of both supporting and carry out communication.When selecting after connection mode, OLT judges that the connection mode whether this connection mode report with ONU is identical, if not identical, this connection mode is sent to connection mode module, does not if the same need to send.ONU only need read connection mode module, just can learn currently should select which kind of connection mode, thereby make ONU and the OLT can communication.That is to say to have three kinds of modes to realize goal of the invention:
Be in connection mode module, to store all Business Streams that ONU supports and a connection mode of GEMPort, and report OLT by ONU, then by OLT, select a kind of connection mode of both supporting; The applicable ONU of this pattern supports the situation of multiple connection mode;
Another kind is in connection mode module, to store the current Business Stream of ONU and GEM Port connection mode, and reports OLT by ONU, so that OLT knows the current connection mode of each ONU; The connection mode that multiple ONU that this pattern is suitable for connecting from OLT support is different, and ONU only supports a kind of connection mode;
Another is in connection mode module, to store all Business Streams that ONU supports and the connection mode of GEMPort, and current Business Stream and the GEM Port connection mode of ONU; The ONU that this pattern is suitable for first two pattern mixes the mode of using.
In the GPON system that the present invention proposes, in device second preferred embodiment of OLT and ONU communication, also comprise mode selection module, the connection mode that described mode selection module is supported according to described ONU and OLT, the connection mode of selecting a kind of ONU and OLT all to support.When selecting after connection mode, OLT judges that the connection mode whether this connection mode report with ONU is identical, if not identical, this connection mode is sent to connection mode module, does not if the same need to send.
In the GPON system that the present invention proposes, as shown in Figure 2, described connection mode module, sending module are arranged in described ONU device the 3rd preferred embodiment of OLT and ONU communication; Described mode selection module is arranged in described OLT.
In the GPON system that the present invention proposes, as shown in Figure 3, the difference of itself and the 3rd preferred embodiment is that described connection mode module is arranged in the ONT2-G management entity of described ONU to device the 4th preferred embodiment of OLT and ONU communication.Wherein connection mode module can be divided into concatenation ability module and current connection mode module, one of or both, be used for respectively storing all Business Streams that this ONU supports and the connection mode of GEM Port, and current Business Stream and the GEMPort connection mode of this ONU.These two modules can be the attribute field of some management entities (Management Entity, hereinafter to be referred as ME), for example the attribute field of the ONT2-G management entity in the present embodiment.
In G984.4 standard, stipulated ONT2-G management entity, this management entity automatically generates in ONU power-up initializing, and OLT can arrange it by SET order follow-up.
The design parameter of ONT2-G ME and standard, the ITU-TG984.4 agreement that visible in February, 2008, ITU announced.
In the above-described embodiments, the mode that the connection mode that sending module is supported ONU sends to OLT has two kinds, one is initiatively connection mode to be sent to OLT when ONU power-up initializing, can be also that the connection mode of when ONU receives the order of OLT, ONU being supported sends to OLT.
In GPON system the present invention being proposed below in conjunction with Fig. 4, the method for OLT and ONU communication describes.
Fifth preferred embodiment of the invention flow process, comprising:
Step 1, ONU send to OLT by the Business Stream of its support and GEM Port connection mode and/or current Business Stream and the GEM Port connection mode of this ONU;
Step 2, the connection mode of supporting according to described ONU, and the connection mode of described OLT support, the connection mode of selecting a kind of ONU and OLT all to support.
In above-mentioned the 5th preferred embodiment, ONU sends to OLT by the Business Stream of its support and GEM Port connection mode and/or current Business Stream and the GEM Port connection mode of this ONU.Just as described in the first embodiment, this is for three kinds of patterns for different ONU, at this, does not repeat one by one.When adopting, in connection mode module, store all Business Streams that ONU supports and the connection mode of GEMPort, and while reporting this pattern of OLT by ONU, its concrete steps as shown in Figure 4, comprising:
Step a, ONU send to OLT by the Business Stream of its support and GEM Port connection mode and/or current Business Stream and the GEM Port connection mode of this ONU;
Step b, the connection mode of supporting according to described ONU, and the connection mode of described OLT support, the connection mode of selecting a kind of ONU and OLT all to support;
Step c, OLT send to ONU by the connection mode of selection.
Wherein, in step c, it is multiple that OLT sends to the mode of ONU to have, can be directly to change current Business Stream and the GEM Port connection mode in connection mode module, stored, and can be also other modes, at this, do not repeat one by one.
Sixth preferred embodiment of the invention flow process, comprising:
Step 0, arrange with lower module:
Connection mode module, at least stores Business Stream that this ONU supports and GEM Port connection mode and/or this ONU current Business Stream and GEM Port connection mode in described module;
Sending module, the Business Stream that the connection mode that described sending module is supported this ONU storing in described connection mode module and/or this ONU are current and GEM Port connection mode send to OLT.
In above-mentioned the 5th preferred embodiment, first a system as described in the first embodiment is set, then by this system, complete the method for the 5th embodiment.
The seventh embodiment of the present invention is the improvement based on the 6th preferred embodiment, comprising:
As technique scheme preferably,, described step 0 is specially:
Step 0a, in ONU, arrange with lower module:
Connection mode module, at least stores Business Stream that this ONU supports and GEM Port connection mode and/or this ONU current Business Stream and GEM Port connection mode in described module;
Sending module, the Business Stream that the connection mode that described sending module is supported this ONU storing in described connection mode module and/or this ONU are current and GEM Port connection mode send to OLT;
Step 0b, in described OLT, arrange with lower module:
Mode selection module, the connection mode that described mode selection module is supported according to described ONU and OLT, the connection mode of selecting a kind of ONU and OLT all to support.When selecting after connection mode, OLT judges that the connection mode whether this connection mode report with ONU is identical, if not identical, this connection mode is sent to connection mode module, does not if the same need to send.
As the 8th preferred embodiment of the present invention, the described connection mode module in the 6th above-mentioned embodiment is arranged in the ONT2-G management entity of described ONU.Just as described in the fourth embodiment, connection mode module can be divided into concatenation ability module and current connection mode module, one of or both, be used for respectively storing all Business Streams that this ONU supports and the connection mode of GEM Port, and current Business Stream and the GEM Port connection mode of this ONU.These two modules can be the attribute field of some management entities (Management Entity, hereinafter to be referred as ME), for example the attribute field of the ONT2-G management entity in the present embodiment.
In the above-described embodiment, the mode that the connection mode that ONU is supported sends to OLT has two kinds, one is initiatively connection mode to be sent to OLT when ONU power-up initializing, and another kind is that the connection mode of when ONU receives the order of OLT, ONU being supported sends to OLT.
Although; the present invention clearly demonstrates by above embodiment and accompanying drawing thereof; but in the situation that not deviating from spirit of the present invention and essence thereof; person of ordinary skill in the field is when making according to the present invention various corresponding variations and correction, but these corresponding variations and correction all should belong to the protection range of claim of the present invention.
Claims (2)
1. a device for optical line terminal and optical network unit communication in GPON system, is characterized in that, comprising:
Connection mode module, is arranged in the ONT2-G management entity of ONU, at least stores this optical network unit and be Business Stream that ONU supports and GEM Port connection mode and this ONU current Business Stream and GEM Port connection mode in described module;
Described connection mode module comprises concatenation ability module and current connection mode module, described concatenation ability module is used for storing all Business Streams and the GEM Port connection mode that this ONU supports, described current connection mode module is used for storing the current Business Stream of ONU and GEM Port connection mode;
Sending module, it is OLT that the Business Stream that the connection mode that described sending module is supported this ONU storing in described connection mode module and this ONU are current and GEM Port connection mode send to optical line terminal; And
Mode selection module, the connection mode that described mode selection module is supported according to described ONU and OLT, the connection mode of selecting a kind of ONU and OLT all to support;
Wherein said connection mode module and sending module are arranged in described ONU; Described mode selection module is arranged in described OLT;
Described mode selection module is selected after connection mode, OLT judges that the connection mode whether this connection mode report with ONU is identical, if not identical, this connection mode is sent to connection mode module, if the same do not send, the mode that this connection mode is sent to connection mode module is directly to change current Business Stream and the GEM Port connection mode in connection mode module, stored; Described sending module initiatively sends to OLT by the connection mode of its support when ONU power-up initializing, or the connection mode of when ONU receives the order of OLT, ONU being supported sends to OLT.
2. a method for optical line terminal and optical network unit communication in GPON system, is characterized in that, comprising:
Step 0a, in ONU, arrange with lower module:
Connection mode module, is arranged in the ONT2-G management entity of ONU, at least stores Business Stream that this ONU supports and GEM Port connection mode and this ONU current Business Stream and GEM Port connection mode in described module;
Described connection mode module comprises concatenation ability module and current connection mode module, described concatenation ability module is used for storing all Business Streams and the GEM Port connection mode that this ONU supports, described current connection mode module is used for storing the current Business Stream of ONU and GEM Port connection mode;
Sending module, the connection mode that described sending module is supported this ONU storing in described connection mode module and current Business Stream and the GEM Port connection mode of this ONU send to OLT;
Step 0b, in described OLT, arrange with lower module:
Mode selection module, the connection mode that described mode selection module is supported according to described ONU and OLT, the connection mode of selecting a kind of ONU and OLT all to support;
Step 1, optical network unit be ONU when ONU power-up initializing or when ONU receives the order of OLT, it is OLT that the Business Stream of its support and GEM Port connection mode are sent to optical line terminal;
Step 2, the Business Stream of supporting according to described ONU and GEM Port connection mode, and the connection mode of described OLT support, the connection mode of selecting a kind of ONU and OLT all to support;
Step 3, select after connection mode when mode selection module, OLT judges that the connection mode whether this connection mode report with ONU is identical, if not identical, this connection mode is sent to connection mode module, the mode that this connection mode is sent to connection mode module is directly to change current Business Stream and the GEM Port connection mode in connection mode module, stored, and if the same step finishes.
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| CN102291246A (en) * | 2010-06-21 | 2011-12-21 | 中兴通讯股份有限公司 | Selection method and system of optical network unit (ONU) management maintenance mode |
| WO2015085559A1 (en) * | 2013-12-12 | 2015-06-18 | 华为技术有限公司 | Method for processing packet in access network, and network device |
| CN104125099B (en) * | 2014-08-06 | 2019-10-11 | 上海斐讯数据通信技术有限公司 | A kind of EPON system Remote configuration management method |
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| CN101005445A (en) * | 2006-01-18 | 2007-07-25 | 华为技术有限公司 | Method for mapping service flow to service transmission path and optical network terminal |
| CN101079801A (en) * | 2006-05-25 | 2007-11-28 | 华为技术有限公司 | Method for transmitting uplink control packet in Gbit passive optical network system |
| CN101202588A (en) * | 2006-12-14 | 2008-06-18 | 中兴通讯股份有限公司 | Service management system of GigaBit passive optical network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005445A (en) * | 2006-01-18 | 2007-07-25 | 华为技术有限公司 | Method for mapping service flow to service transmission path and optical network terminal |
| CN101079801A (en) * | 2006-05-25 | 2007-11-28 | 华为技术有限公司 | Method for transmitting uplink control packet in Gbit passive optical network system |
| CN101202588A (en) * | 2006-12-14 | 2008-06-18 | 中兴通讯股份有限公司 | Service management system of GigaBit passive optical network |
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