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WO2009121275A1 - Procédé, équipement et système de traitement de transmission pour réseau optique - Google Patents

Procédé, équipement et système de traitement de transmission pour réseau optique Download PDF

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Publication number
WO2009121275A1
WO2009121275A1 PCT/CN2009/070977 CN2009070977W WO2009121275A1 WO 2009121275 A1 WO2009121275 A1 WO 2009121275A1 CN 2009070977 W CN2009070977 W CN 2009070977W WO 2009121275 A1 WO2009121275 A1 WO 2009121275A1
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WIPO (PCT)
Prior art keywords
type
message
type identification
data transmission
module
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PCT/CN2009/070977
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English (en)
Chinese (zh)
Inventor
高波
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0066—Provisions for optical burst or packet networks

Definitions

  • Embodiments of the present invention relate to the field of communications technologies, and in particular, to an optical network transmission processing method, apparatus, and system. Background technique
  • fiber access technology has determined its future as the ultimate solution for broadband access network technology due to its huge capacity and long-distance transmission.
  • fiber access network such as PON (Passive Optical Network), AON (Active Optical Network), and the like.
  • the existing fiber access network mostly adopts point-to-multipoint optical fiber transmission and access technology, taking the PON configuration as an example.
  • the network architecture is generally as shown in FIG. 1 and may include an OLT 100 (Optical Line Terminal). ;), ONU 200 (Optical Network Unit), and a passive optical splitter (Splitter) 300.
  • the OLT 100 is a central office device set on the service side of the network operator; the ONU 200 is a terminal device on the user side of the network; the ONU 200 and the OLT 100 are connected by the optical splitter 300, and the OLT 100 and the optical splitter 300 are connected.
  • the main fibers are connected to each other, and the branch fibers are connected between the ONU 200 and the optical splitter 300.
  • the plurality of branch fibers are merged in the optical splitter 300 and fused together to the main fibers.
  • GPON Gigabit PON, Gigabit Passive Optical Network
  • SDH Synchronous Digital Hierarchy
  • GEM G-PON Encapsulation Method, Gigabit Passive Optical Network Encapsulation Method
  • the OLT sends downlink messages to the ONU, and the message interaction of uploading uplink messages to the OLT through the ONU controls and carries the data transmission.
  • the manner in which the OLT and the ONU can interact is as follows: First, the OLT broadcasts and sends the probe message of the set format to all the ONUs connected thereto; after receiving the probe message, the ONU sends a response message to the OLT, so that the OLT recognizes the existence of the ONU. Then, the registration process of the ONU to the OLT is completed; after the registration is completed, the ONU generally reports its performance attributes to the OLT through the OMCI (ONU Management and Control Interface) channel, for example, the uplink rate can be reported.
  • OMCI ONU Management and Control Interface
  • the uplink or downlink message of each interaction needs to be encapsulated according to a certain protocol and then sent.
  • the OLT or the ONU needs to parse and decapsulate according to a certain protocol. Wait for processing to correctly identify the message content.
  • the more advanced and high-speed passive optical access networks can be collectively referred to as NGPON (Next Generation PON).
  • NGPON Next Generation PON
  • the service provider side network element device such as the OLT in the upgraded NGPON can be connected to more user side network element devices.
  • the maximum branch ratio of the OLT and the ONU supported by the original GPON system is 1:64, and the existing supportable branches are available.
  • the ratio is up to 1: 512 or 1: 1024, and it can transmit more data streams at the same time, but the identification and address that the original protocol can assign to the ONU and the data stream limits the number of ONUs and the number of data streams, so the fiber access network is common. Facing the problem of expansion. high speed
  • the ONU has a larger uplink rate. Therefore, the physical layer characteristics are different. For example, a longer physical layer overhead is required to effectively perform power threshold decision and clock recovery.
  • the frame format of the uplink message and the downlink message needs to be adjusted.
  • the operation management and configuration are also different.
  • the corresponding protocol needs to be parsed by different protocols.
  • the uplink message is used.
  • the current fiber access network expansion solution from the perspective of reducing costs and making full use of existing investments, it is often impossible to replace all existing user side network element devices, especially ONUs. Therefore, how to implement the coexistence compatibility between the existing user-side network element device and the user-side network element device after the capacity expansion is an urgent problem to be solved. Summary of the invention
  • the embodiments of the present invention provide an optical network transmission processing method, apparatus, and system, so as to implement compatible coexistence of different transmission type network element devices that are transmitted based on different transmission technologies.
  • An embodiment of the present invention provides an optical network transmission processing method, including: receiving a type identification message sent by a downlink device, where the type identification message carries a type identification code of a downlink device;
  • An embodiment of the present invention provides an optical network transmission processing apparatus, including: an analysis acquisition module, configured to receive a type identification message sent by a downlink device, and parse the acquisition type identification code from the type identification message;
  • the type identification module is connected to the parsing and obtaining module, and is configured to identify, according to the type identifier, a data transmission type supported by the downlink device;
  • the interaction processing module is connected to the type identification module, and is configured to perform data transmission with the downlink device according to the identified data transmission type.
  • the embodiment of the present invention further provides another optical network transmission processing apparatus, including: a type identification module, configured to set, in a type identification message and/or normal service data, a data transmission type supported by the optical network transmission processing apparatus. a type identifier; a sending module, connected to the type identifier module, configured to send a type identification message of the type identifier module and/or normal service data to the uplink device, to indicate that the uplink device is After receiving the type identification code, according to the data transmission
  • the input type performs data reception analysis with the optical network transmission processing device.
  • An embodiment of the present invention further provides an optical network transmission processing system, including an optical line termination optical line termination, including:
  • the parsing and obtaining module is configured to receive a type identification message uploaded by the optical network unit, and parse the type identification code from the type identification message;
  • a type identification module configured to be connected to the parsing acquisition module, configured to identify, according to the type identification code, a data transmission type supported by the optical network unit;
  • An interaction processing module connected to the type identification module, configured to perform data transmission with the optical network unit according to the identified data transmission type
  • the optical network unit includes:
  • a type identification module configured to set, in the type identification message and/or normal service data, a type identification code that identifies a data transmission type supported by the optical network unit; and a sending module, connected to the type identification module, for Sending the type identification module sets a type identification message of the type identification code and/or normal service data to the optical line terminal.
  • the embodiment of the present invention adopts the technical means for setting the type identification code to report in the type identification message, which overcomes the problem that the service provider side network element device cannot correctly identify the data transmission on the user side network element device in the prior art.
  • Type to provide technical questions about the service.
  • the present invention can implement network upgrade or expansion without affecting the normal communication of the existing network element equipment, thereby protecting the existing investment, saving the operator cost, and facilitating the promotion and application.
  • FIG. 1 is a schematic structural diagram of a passive optical network in the prior art
  • FIG. 2 is a schematic flowchart of a first embodiment of a transmission processing method according to a first embodiment of the present invention
  • FIG. 3 is a schematic diagram of a frame format of a delimiter determining message according to a first embodiment of the first transmission processing method of the present invention
  • FIG. 3b is a schematic diagram of a frame format of a frame overhead portion in a delimiter determining message according to a first embodiment of the first transmission processing method of the present invention
  • 3C is a schematic diagram of a frame format of a PLOAMd field in a delimiter determining message according to a first embodiment of the first transmission processing method of the present invention
  • 4a is a schematic diagram of a frame format of a GTC uplink message in the first embodiment of the first transmission processing method of the present invention
  • 4b is a schematic diagram of a frame format of a "PLOu" field in a GTC uplink message in the first embodiment of the first transmission processing method of the present invention
  • FIG. 5 is a schematic flowchart of a first embodiment of a transmission processing method according to a second embodiment of the present invention
  • FIG. 6 is a schematic flowchart of a first embodiment of a transmission processing method according to a third embodiment of the present invention
  • 7b is a schematic diagram of a frame format of a data field of a serial number response message in the third embodiment of the first transmission processing method of the present invention.
  • FIG. 8 is a first schematic structural diagram of a first embodiment of a transmission processing apparatus according to the present invention
  • FIG. 9 is a second schematic diagram of a second embodiment of a transmission processing apparatus according to the present invention. Schematic diagram of the process of the first embodiment
  • FIG. 11 is a schematic structural diagram of a second embodiment of a transmission processing apparatus according to the present invention.
  • FIG. 12 is a schematic structural diagram of a specific embodiment of a transmission processing system according to the present invention. detailed description
  • the optical network transmission processing method provided by the embodiments of the present invention can be applied to compatible coexistence of multiple types of user-side network element devices for data transmission based on different data transmission technologies, for example, coexistence of GPON network element devices and NGPON network element devices.
  • the problem is that the NGPON may be 10G-GPON, WDM-PON (Wavelength Division Multiplexing - PON), Hybrid-PON (Hybrid PON), or the like.
  • G-ONU The ONU based on NGPON technology is called NG_ONU.
  • FIG. 2 is a flowchart of a first embodiment of an optical network transmission processing method according to the present invention.
  • the embodiment is applicable to a case where a frame format specified by a data transmission protocol used by the GPON technology and the NGPON technology is different, specifically The method performed by the OLT on the service provider side, and the method for processing the transmission specifically includes:
  • Step 110 The OLT generates two types of detection messages, where the frame formats of the two types of detection messages respectively correspond to different data transmission protocol settings, and different types of identification codes are respectively set in the two types of detection messages, and the OLT sends various types of detection codes to the ONU.
  • the downlink message frame format generally includes two parts, a frame overhead part and a payload part, where the payload part needs to be encapsulated.
  • the OLT may specifically set the first time for the G-ONU in the frame overhead part of a type of probe message.
  • a type value such as "0x85B3" as the type identification code
  • a second type value for the NG-ONU such as "0xB5983" as the type identification code;
  • Step 120 The OLT performs corresponding encapsulation according to different data transmission protocols according to the type identification code set in the type detection message.
  • the type identification code is set to the first type value
  • the Ploam message is encapsulated by using the G-PLOAM format, and then multiplexed to the GTC downlink.
  • the message frame is delivered, and when the type identifier code is set to the second type value, the ploam message is encapsulated by using the NG-PLOAM format, and then multiplexed into the NG-GTC downlink message frame to be delivered;
  • Step 130 The OLT broadcasts the encapsulated two types of probe messages to all ONUs connected to the local device to indicate that when each ONU parses and obtains the corresponding type of probe message, the type identifier code is set in the type identifier message and returned to the OLT.
  • OLT broadcasts the encapsulated two types of probe messages to all ONUs connected to the local device to indicate that when each ONU parses and obtains the corresponding type of probe message, the type identifier code is set in the type identifier message and returned to the OLT.
  • two types of probe messages can be received by all ONUs connected to the OLT.
  • the type detection message can only be parsed based on one of its own data transmission protocols, ie: because the format of the type detection message corresponding to different data transmission protocols is different, the ONU can receive it. All types of probe messages, but only one type of probe message can be parsed. Then, the G-ONU will discard the type detection message based on the NGPON protocol encapsulation because it cannot be parsed. Similarly, the NG-ONU will discard the type detection message based on the GPON protocol encapsulation because it cannot be parsed. In fact, each ONU can only solve the solution correctly. Extract a type of probe message.
  • the OLT should further encapsulate the data transmission protocol according to the different data transmission protocol indicated by the type identification code set in the type detection message, if a data transmission type is set in a certain type of detection message.
  • the type identification code but with another data transfer protocol setting and encapsulation, will prevent any ONU from parsing any type of probe message in the case of this crossover setting.
  • the type identifier is set in the generated type identification message according to the protocol, and the type identification message is uploaded to the OLT.
  • Step 140 When the OLT receives the type identification message uploaded by each ONU, parse the acquisition type identification code from the type identification message.
  • Step 150 The OLT identifies the type of data transmission supported by the ONU according to the type identification code, that is, determines whether the ONU is based on the GPON technology or the NGPON technology, and can continue to perform the data transmission operation of the uplink message and the downlink message after correctly identifying each ONU data transmission type.
  • the specific implementation manners of the foregoing step 140 and the step 150 are: when the OLT receives and detects that a specified field in the uplink message frame overhead field is a set value, for example, a first type value, parsing according to a frame format of the GTC uplink message, Demultiplexing the GEM frame for decapsulation, and parsing when there is a PLOAM message; when detecting that the specified field in the frame overhead field is the second type value, parsing according to the frame format of the NG-GTC uplink message, The demultiplexed NG-GEM frame is decapsulated, and parsed when there is an NG-PLOAM message.
  • a specified field in the uplink message frame overhead field is a set value, for example, a first type value, parsing according to a frame format of the GTC uplink message, Demultiplexing the GEM frame for decapsulation, and parsing when there is a PLOAM message
  • the specified field in the frame overhead field is the second type
  • each type of ONU only uploads a type identification message corresponding to its own data transmission type, so the above steps can implement the OLT. Identify the type of each ONU.
  • the original message can be utilized, for example, the message is determined by a delimiter, and the P name is "Upstream-Overhead” PLOAM (Physical Layer Operation Administration and Maintenance) message as a type setting command.
  • PLOAM Physical Layer Operation Administration and Maintenance
  • the OLT for the ONU newly connected to it, usually before the ONU is registered Send the "Upstream_Overhead” message, the general format of the GTC (Gigabit PON Transmission Convergence, Gigabit Passive Optical Network for Transmission Convergence) downlink message is shown in Figure 3a, including the frame overhead part "PCBd" and the frame payload part. Payload", the frame format of the frame overhead part is shown in Figure 3b.
  • the "PLOAMd" field of the frame overhead part carries the content of the PLOAM message.
  • the specific format of the field is shown in Figure 3c.
  • One of the functions of the "Message” field in the PLOAM message is the allocation of the uplink message for the ONU to be sent to the OLT.
  • the specified delimiter in this embodiment, may be a type identification code of a non-type.
  • the ONU when the ONU receives the "Upstream_Overhead" message from the OLT, it will obtain the delimiter assigned to its use from the "Message” field according to the protocol, thereby using the delimiter as a future interaction with the OLT.
  • the delimiter to use in the message when the ONU receives the "Upstream_Overhead" message from the OLT, it will obtain the delimiter assigned to its use from the "Message” field according to the protocol, thereby using the delimiter as a future interaction with the OLT. The delimiter to use in the message.
  • the frame format of the GTC uplink message uploaded by the ONU is as shown in Figure 4a, including the "PLOu”, “PLOAMu”, “PLSu”, “DBRu” and frame payload "payload” parts.
  • the "PLOu” field is shown in Figure 4b.
  • the delimiter field is included with "Delimiter”.
  • the ONU will set the type identification code set in the downlink message for assigning the delimiter field as a delimiter to be uploaded in the "Delimiter" field of the uplink message returned to the OLT.
  • the technical solution is particularly suitable for the case where the ONU bursts the uplink message to the OLT, and the ONU will use the OLT to allocate the delimiter used by it to upload the message to the OLT.
  • the technical solution utilizes the existing delimiter allocation process.
  • the existing delimiter allocation is determined by the OLT and the ONU to determine a delimiter value, and is used in subsequent uplink messages.
  • the technical solution of this embodiment is different data.
  • the ONU of the transport type specifies a different delimiter value, which on the one hand still has the function of the original delimiter and on the other hand becomes the type identifier of the ONU.
  • the delimiter is used in each uplink message, so the OLT can identify the data transmission type of the ONU according to the delimiter in each uplink message to perform corresponding processing.
  • the implementation of this embodiment may send the type identification code to the ONU in a field specified in other messages broadcasted by the OLT to the ONU, or generate a broadcast message dedicated to performing type detection, and instruct the ONU to follow the preset protocol from the specified protocol.
  • the field obtains the type identification code and sets it to the setting field that itself uploads to the OLT message. For identification by the OLT. As long as the resolution modes adopted by each type of ONU are different, it is possible to correctly analyze and identify the transmission type data corresponding to the corresponding type identification code.
  • the OLT initiates the identification of the ONU data transmission type by using the technical solution of the embodiment, so that the data transmission type of the ONU can be processed correspondingly, for example, according to the data transmission type of the ONU.
  • the technical solution of this embodiment is not limited to the data transmission type identification of the G-ONU and the NG-ONU, and can be further extended to implement correct identification of multiple network element device types based on different protocols and frame formats, and The changes in the optical network element equipment are extremely small, especially the operation flow of the ONU is hardly changed. Therefore, the technical solution can effectively realize the compatible coexistence of different types of optical network devices, and the program is simple, low in cost, and easy to implement.
  • the first optical network transmission processing method embodiment 2 is the first optical network transmission processing method embodiment 2
  • FIG. 5 is a flowchart of a second embodiment of a first optical network transmission processing method according to the present invention.
  • the embodiment may be based on the first embodiment, and further improve the transmission processing method that the OLT continues to perform data transmission with the ONU after correctly identifying each ONU data transmission type. Specifically, the following steps may be performed:
  • Step 151 The OLT performs data transmission type identification of each ONU according to the type identification code.
  • Step 152 The OLT records the data transmission type of each identified ONU in an local ONU registry corresponding to each ONU, and specifically records the identified data transmission type corresponding to the serial number "SN" of each ONU, such as "GPON". "NGPON”; in the ONU registry, at least two fields are included, one for storing the ONU serial number "SN" and the other for storing the corresponding attribute, that is, the type describing the ONU is G - ONU or NG-ONUo
  • the ONU registry may also include, but is not limited to, an ONU identifier 'ONU-ID', a package identifier "GEM port-ID", an authorized time slice identifier "Alloc-ID", etc.
  • the ONU registry may use the above.
  • the current type of the ONU or the NG-ONU is obtained by the identification of the uplink type identification message during the registration process, and then automatically configured, or manually configured.
  • Step 153 After the OLT sends the broadcast message, it needs to unicast to the designated ONU.
  • the OLT when the OLT is connected to the ONUs based on different transmission technologies, multiple TC (Transmission Convergence) layer transmission channels are set for the ONUs of different data transmission types to ensure that the downstream flows of different types of ONUs are correctly transmitted.
  • TC Transmission Convergence
  • the data transmission type can be identified by querying the registration table again.
  • the ONU data transmission type recorded in the ONU registry is not limited to the above-mentioned use of the embodiment.
  • the OLT may generate a corresponding PLOAM message for the downlink message according to the type obtained by the query, or send the corresponding PLOAM message.
  • the downlink message is allocated a corresponding bandwidth, that is, an authorized time slice in which the "US BWmap" field in the frame overhead portion is allocated to each ONU for uploading the bearer data in the set time period in the form of "Alloc - ID", or
  • the OLT may also determine a frame multiplexing format and the like according to the data transmission type obtained by the query for the downlink message to be sent. For the OLT to receive the data transmission type uploaded by the ONU, the OLT can parse the acquisition delimiter from each uplink message to identify the ONU data transmission type.
  • the data transmission type of each ONU is recorded by establishing an ONU registry.
  • the ONU registry can be queried to process according to the corresponding data transmission protocol.
  • the technical solution of this embodiment implements the compatibility of the OLT downlink message transmission, and can adapt to the coexistence of different data transmission types ONU.
  • FIG. 6 is a flowchart of a third embodiment of an optical network transmission processing method according to the present invention.
  • the transmission processing method is specifically applicable to coexistence of G_ONU and NG-ONU, and performs message transmission with the OLT based on the same protocol.
  • the transmission processing method performed by the service provider side OLT specifically includes:
  • Step 210 When the OLT receives the serial number response message uploaded by the ONU, the OLT receives the "SN response" message, and parses the reserved field from the "SN response” message. Take the type identification code set by the ONU itself;
  • Step 220 The OLT performs type identification according to the type identification code to perform data transmission, and may specifically perform operations such as message transmission or management of the message. After performing category identification in this step, the foregoing steps 151-153 may also be performed, and the OLT stores and Maintain the registry of the ONU.
  • type identification is initiated by the ONU.
  • the OLT sends a sequence number acquisition request "SN request" to obtain the serial number of the ONU before the ONU-ID is assigned to the ONU.
  • the ONU can pass the PLOAM message named "Serial_Number_ONU".
  • the format of the "Serial_Number_ONU” message is as shown in Fig. 7a, in which the type identification code can be set using the reserved bit field in the last data field as shown in Fig. 7b.
  • the optical network transmission processing method is not limited to setting the type identification code in the reserved field in the sequence number response message.
  • the general GTC uplink message format can be seen in FIG. 4a, including “PLOu”, “PLOAMu”, “PLSu”, “DBRu” and the frame payload part, where the "PLOu” field is shown in Figure 4b, including not only the delimiter field of "Delimiter”, but also a 1-bit "Ind” field, which can be used as a reserved field to set the type identifier. code.
  • the reserved field can also be used to set the type identification code to implement the ONU reporting type to the OLT.
  • the frame formats specified by the protocol according to the G-ONU and the NG-ONU are the same, the data content of the respective G-ONU and the NG-ONU are still different depending on the transmission technology, and at the same time, in order to better manage the G-ONU and NG - ONU also urgently needs the OLT to identify the type of ONU data transmission. After identifying the data transmission type of each ONU, the OLT can locally establish the above ONU registry to record each ONU type for subsequent processing or management.
  • the ONU reporting class can be reported through the OMCI channel after the ONU is registered on the OLT.
  • the OLT receives the type identification message through the OMCI channel, the type identification is performed. Solution in the message The acquisition type identification code is identified for identification.
  • the OLT receives the capability report message through the OMCI channel as the type identification message.
  • the capability reports the reserved field in the message. Parse the type identifier that gets the ONU settings.
  • the capability report message may be a message that the ONU reports its uplink rate, protocol support status, or the like, or a message dedicated to the report type identifier.
  • the PLOAM message of the existing report sequence number or the reserved field in the OMCI channel report message is used to implement the ONU reporting type to the OLT.
  • the improvement of existing network element equipment is small, the transformation cost is low, and it is easy to popularize and implement.
  • FIG. 8 is a schematic structural diagram of a first embodiment of an optical network transmission processing apparatus according to the present invention.
  • the optical network transmission processing apparatus in this embodiment may be a service provider side network element device OLT, and the structure thereof includes: an analysis acquisition module. 110.
  • the parsing and obtaining module 110 is configured to parse the obtaining type identification code from the type identification message when the OLT 100 receives the type identification message uploaded by the ONU 200.
  • the type identifying module 120 is connected to the parsing and obtaining module 110, and is configured to identify according to the type.
  • the code performs type identification, and identifies the data transmission type supported by the ONU 200.
  • the interaction processing module 130 is connected to the type identification module 120 for performing data transmission with the ONU 200 according to the identified data transmission type.
  • the optical network transmission processing apparatus of this embodiment may perform the technical solution of any embodiment of the first optical network transmission processing method of the present invention.
  • the type identification message may be a sequence number response message reported by the ONU, or the ONU reports through the OMCI channel. Ability to report news, etc.
  • the method further includes a type detecting module 140, where the type detecting module 140 is configured to generate at least two types of probe messages respectively corresponding to different data transmission protocols, in each type of probe message.
  • Different types of identification codes are respectively set in the frame overhead part, and the data transmission type represented by the type identification code in each type of detection message corresponds to the frame format and encapsulation protocol of the type of detection message, and each type is
  • the probe messages are respectively broadcast and sent to all ONUs 200 connected to the OLT 100 to indicate that when the ONU 200 parses a type identification code for each type of probe message corresponding to a different data transmission protocol, the type identifier is set in the type identification message. Return to OLT 100.
  • the type of the probe message may be a delimiter determining message broadcasted to the ONU 200, and the type identifier message is an uplink message that is responded by the ONU 200, and the type identifier code may determine, by using a delimiter, the message frame overhead field is the ONU 200.
  • the assigned delimiter is set, and the ONU 200 subsequently uses the type identification code as a delimiter to upload an uplink message.
  • the OLT 100 may further include a storage module 150, which is respectively connected to the type identification module 120 and the interaction processing module 130, and is configured to store an ONU registry, record identification.
  • the data transmission type supported by each ONU 200 is obtained, and the interaction processing module 130 queries the data transmission type supported by each ONU 200.
  • the interaction processing module 130 in the optical network transmission processing apparatus OLT 100 of the present embodiment may include at least an encapsulation filtering unit 131, a PLOAM message generating unit 132, and a time slice authorization unit, as shown in FIG. 9, from the perspective of forming a GTC downlink message. 133.
  • the encapsulation filtering unit 131 is connected to the storage module 150, and is configured to encapsulate the downlink message according to the data transmission type obtained by querying from the storage module 150.
  • the specific implementation manner is: the encapsulation filtering unit 131 using the GEM technology "GEM port - ID Filter” is connected to the OMCI adapter "OMCI adapter” for GPON transmission technology and the NG-OMCI adapter "NG-OMCI adapter” for NGPON transmission technology, and the GEM package client "GEM client” for filtering to the package.
  • the unit 131 transmits the control flow and the data flow, and the encapsulation filtering unit 131 performs filtering after the type query, and respectively transmits the GEM package adapter "GEM TC adapter" for the GPON transmission technology and the NG-GEM package for the NGPON transmission technology.
  • the adapter "NG - GEM TC adapter” encapsulates the payload parts "GEM Payload” and "NG - GEM Payload" in the GTC downstream message, and then sets the different package formats in the downstream message "downstream GTC frame".
  • the payload blocks "GEM block” and “NG - GEM block” are transmitted through the two TC layers set on the OLT 100; the PLOAM message generating unit 132 Connected to the storage module 150, The PLOAM message "PLOAM message” and “NG - PLOAM message” are set to be added to the GTC downlink message according to the data transmission type obtained from the query in the storage module 150; the time slice authorization unit 133 may be referred to as a DBA unit, and storage.
  • the module 150 is connected to allocate bandwidth for the downlink message according to the data transmission type obtained by querying from the storage module 150, that is, since the NG-PLOAM format may be different, the DBA unit needs to allocate the PLOAM bandwidth according to "Alloc- ID" Query the ONU registry in the storage module 150, determine whether "Alloc-ID" belongs to G-ONU or NG-ONU, allocate bandwidth to 13-byte for G-ONU, and allocate bandwidth for NG-ONU according to the length of NG-PLOAM.
  • the "Alloc - ID" is an authorized time slice allocated to each ONU 200 for uploading data, and can avoid the time conflict of multiple ONUs 200 connected to the same OLT 100 when uploading a message.
  • the "US BWmap" field of the GTC downstream message frame overhead portion is assigned different bandwidths "gate” and "NG-gate” to the ONU 200.
  • the OLT 100 interaction processing module 130 may further include other units for processing or management operations for the ONU 200 type, and may be connected to the storage module 150 to query the data transmission type of the ONU 200 therein.
  • the frame multiplexing unit is connected to the storage module, and is configured to determine a frame multiplexing format for the downlink message according to the data transmission type obtained by querying from the storage module.
  • the OLT of this embodiment can identify ONUs of different data transmission types, and is applicable to the case where the frame format of the data transmission protocol is the same or different, and provides appropriate data transmission services for different data transmission type ONUs, so that the network can be compatible with different types. ONU.
  • the technical solution is simple, low cost and easy to promote.
  • FIG. 11 is a schematic structural diagram of a second embodiment of a transmission processing apparatus according to the present invention.
  • the transmission processing apparatus may be a user-side network element device ONU, and the structure includes: a type identification module 210 and a sending module 220, where The type identification module 210 is configured to set a type identification code in the type identification message and/or the normal service data, and the sending module 220 is connected to the type identification module 210, and the type identification module 210 is configured to set a type identification message of the type identification code and/or Or normal service data is sent to the OLT 100, the type identification code identifies the type of data transmission supported by the ONU 200 to indicate that the OLT 100 is receiving After the type identification message is type-recognized, it is executed according to the identified data transmission type.
  • the second optical network transmission processing apparatus of this embodiment can perform the second transmission processing method.
  • FIG. 10 is a flowchart of a specific embodiment of a second optical network transmission processing method.
  • the optical network transmission processing method in this embodiment is specifically a user side network element device.
  • the ONU performs the G-ONU and NG-ONU based on different protocols, and can be used in conjunction with the first or second technical solution of the first optical network transmission processing method of the present invention.
  • the steps of the optical network transmission processing method are specifically:
  • Step 310 When the ONU receives the type detection message sent by the OLT, it parses. If the type detection message can be parsed, step 320 is performed, otherwise the type detection message is discarded.
  • Step 320 When the ONU parses the type identification code, sets the type identification code in the locally generated type identification message, and sends the type identification message to the OLT to instruct the OLT to perform the type identification after performing the OLT and the ONU. Message interaction.
  • the type of probe message may be a message dedicated to type detection, or may be determined by using a delimiter as described above, that is, a PLOAM message named "Upstream_Overhead", and may be specifically in "Upstream_Overhead”.
  • the message sets the type identifier in the field that specifies the delimiter for the ONU. Only the corresponding type of ONU can correctly parse the message following the corresponding protocol.
  • the ONU receives the delimiter determination message before registration. According to the protocol, the data is parsed from the set field of the delimiter determination message and then sent to The delimiter to be set in the OLT upstream message. With this rule, the ONU can identify the type identifier sent by the OLT as a delimiter in the type identification message and report it to the OLT for identification.
  • the type identification message can be any uplink message that the ONU reports to the OLT.
  • the technical solution of the embodiment realizes the coexistence of the G-ONU and the NG-ONU, and the improvement on the network element device is small, the transformation cost is low, the scheme is simple, and the implementation is easy to implement.
  • Another specific embodiment of the second transmission processing method is specifically a user side network element device.
  • the steps of the transmission processing method are specifically as follows:
  • the ONU sets the type identification code in the type identification message and sends it to the OLT to instruct the OLT to perform the message interaction between the ONU and the OLT after performing type identification.
  • the ONU performs type reporting on the OLT.
  • the ONU may set the type identification code in the reserved field of the PLOAM message named "Serial_Number_ONU" to indicate the type of the OLT in the sequence number response message. Data transmission after identification.
  • the ONU may, after completing the registration at the OLT, in the dedicated type identification message, or the capability report message as a type identification message, and set a type identification code therein, and send it to the OLT through the OMCI channel.
  • the frame formats specified by the protocol according to the G-ONU and the NG-ONU are the same, the data content of the respective G-ONU and the NG-ONU are still different depending on the transmission technology, and at the same time, in order to better manage the G-ONU and NG - ONU also urgently needs the OLT to identify the type of ONU data transmission. After identifying the data transmission type of each ONU, the OLT can locally establish the above ONU registry to record each ONU type for subsequent processing or management.
  • the technical solution of the embodiment ensures that the OLT recognizes the data transmission type of the ONU by means of the ONU reporting the data transmission type, thereby providing an appropriate data transmission service, thereby achieving compatibility between the G-ONU and the NG-ONU, and the implementation is achieved.
  • the program is simple, the transformation cost is low, and it is easy to promote and apply.
  • the type identification message uploaded to the OLT 100 may be a serial number response message, or may be a capability report message reported by the OMCI channel.
  • the type identification code can be set in the reserved field for the OLT 100 to resolve and recognize. The above method can be applied to the case where different types of ONUs 200 are transmitted based on the same protocol.
  • the optical network transmission processing apparatus of this embodiment may further include a detection module 230.
  • the detection module 230 is connected to the type identification module 210, and is configured to receive each of the corresponding data transmission protocols delivered by the OLT 100.
  • the type detection message is parsed to obtain a type identification code, and the type identification code is provided to the type identification module 210 for identification of the type information, and the identified type identification message and/or normal service is sent by the sending module 220.
  • the data is fed back to the OLT 100.
  • This type of probe message can As the delimiter determines the message, the detecting module 230 can parse the delimiter data allocated to the ONU 200 uplink message from the setting field of the delimiter determining message, and set it to delimit the uplink message uploaded to the OLT 100. In the character field, the type identification code is actually parsed and set back to the OLT 100 in the uplink message. This method can be applied to the case where different data transmission types ONU 200 are transmitted based on different data transmission protocols.
  • the ONUs of different data transmission types can report their own data transmission types to the OLT for identification, and are applicable to the case where the data transmission protocols are the same or different, and the solution enables the OLT to be a different data transmission type ONU.
  • the technical solution is simple, low cost and easy to promote.
  • the optical network transmission processing method and apparatus provided by the present invention are not limited to the identification of the two types of data transmission types ONU by the OLT, and may be extended to two or more types, except that the number of type identification codes is increased.
  • the optical network transmission processing method of the present invention is not limited to the compatibility of different types of network element devices in the fiber access network.
  • networks based on other transmission technologies, such as wireless transmission there are also problems of coexistence of new and old network element devices.
  • the user side network element device cannot be completely replaced.
  • the service provider side network element device has the capability of providing services for multiple types of user side network element devices, and the service provider side network element device is required to identify the user side.
  • the data transmission type of the network element device can be extended to be applied to networks based on other transmission technologies to implement compatible coexistence of different types of network element devices.
  • FIG. 12 is a schematic structural diagram of an embodiment of an optical network transmission processing system according to the present invention.
  • the optical network transmission processing system may specifically be a passive optical fiber access network system, including multiple OLTs 100, and further connected by using optical fibers. Multiple ONUs 200 on the OLT 100.
  • the OLT 100 includes: a parsing and obtaining module 110, configured to receive a type identification message uploaded by the ONU 200, and parse the acquisition type identification code from the type identification message; the type identification module 120 is connected to the parsing and obtaining module 110, and configured to The type identification code performs type identification to identify the data transmission type supported by the ONU 200; and the interaction processing module 130 is connected to the type identification module 120 for transmitting according to the identified data.
  • the input type is transmitted with the ONU 200.
  • the ONU 200 includes: a type identification module 210 and a sending module 220, wherein the type identifying module 210 is configured to set a type identification code in the type identification message and/or normal service data, and the sending module 220 sets the type identification module 210 with the type identifier.
  • the type identification message of the code and/or the normal service data is sent to the OLT 100 connected to the ONU 200, and the type identification code identifies the data transmission type supported by the ONU 200 to indicate that the OLT 100 performs data reception and parsing after the type identification by the OLT 100. .
  • the OLT 100 may further include a storage module 150, which is respectively connected to the type identification module 120 and the interaction processing module 130, and is used for recording the type of data transmission supported by the identified ONU 200.
  • the interaction processing module 130 queries the data transmission type supported by the ONU 200.
  • the optical network transmission processing system may further include: a type detecting module 140, configured in the OLT 100, configured to generate at least two types of probe messages corresponding to different data transmission protocols, in a frame overhead portion of each type of probe message. Separately, different types of identification codes are set, and each type of detection message is broadcasted to each ONU 200 to indicate that when the ONU 200 parses the type detection message, the type identification code is set in the type identification message and returned to the OLT 100; 230, is set in the ONU 200, and is connected to the type identification module 210, and is configured to parse and obtain a type identification code from each type of detection message when receiving the types of detection messages corresponding to different data transmission protocols sent by the type detection module 140.
  • the type identification code is provided to the type identification module 210 for identification of the type information, and the identified type identification message and/or normal service data is fed back to the OLT 100 by the sending module 220.
  • the optical network transmission processing system of this embodiment may specifically adopt the technical solution of any embodiment of the first optical network transmission processing apparatus of the present invention as the OLT in the optical network transmission processing system, and may adopt the second optical network transmission of the present invention.
  • the technical solution of any embodiment of the processing device is used as the ONU in the optical network transmission processing system of this embodiment.
  • the optical network transmission processing system of this embodiment can cooperate with the technical solution of any of the first and second optical network transmission processing methods of the present invention.
  • Different types of user-side network element devices based on different transmission technologies are compatible and coexist, and the implementation program is simple. For existing The improvement of the network element equipment is small, the transformation cost is low, and it is easy to promote and implement.
  • the present invention can be implemented by hardware or by software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present invention can be embodied in the form of a software product that can be stored in a non-volatile storage medium.
  • a computer device (may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.

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Abstract

L'invention porte sur un procédé, un équipement et un système de traitement de transmission pour réseau optique. Le procédé comprend : la réception du message d'identification de type transmis par le dispositif en aval, l'analyse et l'obtention du code de marque de type à partir du message, l'identification du type de transmission de données supporté par le dispositif en aval, et l'exécution de la transmission de données conformément à celui-ci. Une sorte d'équipement comprend le module d'analyse et d'obtention, le module d'identification de type et le module de traitement mutuel pour effectuer le procédé ci-dessus. Une autre sorte d'équipement comprend le module de marque de type et le module de transmission pour régler le code de marque de type dans le message d'identification de type et/ou les données de service normales et les transmettre, afin d'indiquer d'exécuter la transmission de données après identification du type. Le système comprend le terminal de ligne optique, et au moins deux unités de réseau optique se connectant au terminal de ligne optique par une fibre, le terminal de ligne optique pouvant être ledit premier équipement, l'unité de réseau optique pouvant être ledit second équipement. Selon la présente invention, il est possible de mettre en œuvre la mise à jour ou l'extension de capacité du réseau, de protéger également l'investissement pour le dispositif d'unité de réseau existant, de réduire le coût de reconstruction. L’invention peut en outre être facilement popularisée et appliquée.
PCT/CN2009/070977 2008-04-01 2009-03-24 Procédé, équipement et système de traitement de transmission pour réseau optique Ceased WO2009121275A1 (fr)

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