WO2009121308A1

WO2009121308A1 - Method, equipment and system for optical network data processing

Info

Publication number: WO2009121308A1
Application number: PCT/CN2009/071147
Authority: WO
Inventors: 高波
Original assignee: 华为技术有限公司
Priority date: 2008-04-02
Filing date: 2009-04-02
Publication date: 2009-10-08
Also published as: CN101552772B; CN101552772A

Abstract

A method, an equipment and a system for optical network data processing. The method includes that: the Gigabit Passive Optical Network Convergence (GTC) frames of at least two types are received; the types of GTC frames are identified according to the identifier in the physical layer overhead of the received GTC frames; the GTC frames are processed correspondingly according to the identifying result. The embodiment of the present invention processes the GTC frames of the different types according to the identifying result of received GTC frames, consequently, the optical network unit which supports the original protocol and the capacity expended and upgraded optical network unit which supports the new protocol can be distinguished and identified, and through the identifying, the different processing manners can be adopted according to the different protocol types supported by the different optical network units, finally the coexistence of the two optical network units is realized.

Description

Optical network data processing method, device and system

This application claims priority to Chinese Patent Application No. 200810103282.2, entitled "Optical Network Data Processing Method, Apparatus and System", filed on April 2, 2008, the entire contents of which are incorporated herein by reference. In the application. Technical field

The embodiments of the present invention relate to the field of network communications, and in particular, to an optical network data processing method, apparatus, and system. Background technique

With the increasing enrichment of telecom services, users are increasingly demanding bandwidth. The existing twisted pair and coaxial cable access technologies can make full use of existing copper resources, but cannot be used for new services such as video on demand. Two-way video conferencing provides sufficient bandwidth, and the transmission distance is limited, and the network coverage is small. The huge capacity and long-distance transmission of optical fiber determine that fiber access is the ultimate solution for broadband access. Therefore, domestic and foreign operators have already adopted fiber-to-the-home. (fiber to the home, FTTH) is an inevitable choice for access networks.

FIG. 1 is a schematic diagram of a network of a passive optical network (PON) in the prior art. The OLT is an optical line terminal (OLT), which is a central office equipment located in a carrier's equipment room. The ONU is an Optical Network Unit (ONU), which is a user terminal located inside the user's room. The downstream direction from the OLT to the ONU is broadcast, that is, one OLT communicates with multiple ONUs at the same time. Gigabit PON (GPON) has wide bandwidth efficiency, and its synchronous timer mechanism follows the traditional synchronous digital system. It can use Gigabit Passive Optical Network (GEM) method. Adapting to two rates of service, it has become the system most used by operators in various countries.

The current GPON system is flawed. First, because the maximum branch ratio supported by the GPON system is limited, the number of users increases and the network scale continues to expand. The existing protocol of the Gigabit PON Transmission Convergence (GTC) layer needs to be modified to expand the address field of the relevant protocol frame. Expanding or upgrading based on the original GPON system, so that the original ONU supports the original protocol and expands or upgrades the new ONU to support the new protocol after the address extension. As a result, the ONUs under the two protocols cannot coexist. Secondly, the existing GPON transmission rate is limited. In order to protect the existing investment, only some ONUs of the existing GPON system can be upgraded to ONUs supporting the new protocol, while the original ONUs and the ONUs supporting the new protocols are in the physical There are differences in layer characteristics, which causes the OLT to fail to recognize the ONU that supports the original protocol and the ONU that supports the new protocol after the address extension. Summary of the invention

The embodiments of the present invention provide an optical network data processing method, apparatus, and system that enable an OLT to identify an ONU supporting an original protocol and an ONU supporting a new protocol, so as to implement ONU coexistence of at least two different protocol types.

To achieve the above objective, an embodiment of the present invention provides an optical network data processing method, including:

Receiving at least two types of Gigabit passive optical network transmission aggregate GTC frames;

Corresponding processing is performed on the GTC frame according to the recognition result.

An embodiment of the present invention provides an optical network data processing apparatus, including:

a first receiving unit, configured to receive a Gigabit passive optical network transmission aggregation GTC frame sent to different types of ONUs;

An identifier unit, configured to perform different identifiers on the GTC frames received by the first receiving unit;

The first sending unit is configured to send the GTC frame that is identified by the identifier unit. The embodiment of the present invention further provides another optical network data processing apparatus, including: a second receiving unit, configured to receive at least two types of Gigabit passive optical network transmission aggregate GTC frames, where the physical layer overhead of the GTC frame is Have different logos;

An identifying unit, configured to identify a type of the GTC frame according to an identifier in a physical layer overhead in a GTC frame received by the second receiving unit;

And a second sending unit, configured to send the GTC frame to another device for performing corresponding processing according to the recognition result. An embodiment of the present invention provides an optical network data processing system, including: an optical line terminal device, configured to identify, transmit, or receive a downlink GTC frame transmitted to a downlink Gigabit passive optical network sent to different types of ONUs. At least two types of uplink GTC frames are identified;

And an optical network unit, configured to identify the downlink GTC frame according to the identifier in the physical layer overhead in the received GTC frame, or identify and send the uplink GTC frame. Therefore, the embodiment of the present invention processes different types of GTC frames according to the recognition result of the received GTC frame, so that the optical network unit supporting the original protocol and the optical network unit supporting the new protocol after the expansion or upgrade can be performed. Differentiating and identifying, by identification, different processing modes can be adopted according to different protocol types supported by different optical network units, and finally the coexistence of two optical network units is realized.

Compared with the prior art, the embodiment of the present invention overcomes the above drawbacks of the prior art that the OLT cannot identify two types of ONUs. DRAWINGS

1 is a structural diagram of a networking of a passive optical network in the prior art;

2 is a flowchart of Embodiment 1 of an optical network data processing method according to the present invention; FIG. 3 is a flowchart of Embodiment 2 of an optical network data processing method according to the present invention; FIG. 4 is a new protocol in Embodiment 2 of an optical network data processing method according to the present invention; Schematic diagram of the frame structure of the uplink GTC frame; 5 is a flowchart of a third embodiment of an optical network data processing method according to the present invention; FIG. 6 is a schematic diagram of a frame structure of a first downlink GTC frame in a new protocol in the third embodiment of the optical network data processing method according to the present invention;

FIG. 8 is a schematic structural diagram of Embodiment 4 of an optical network data processing apparatus according to the present invention; FIG. 8 is a schematic structural diagram of Embodiment 1 of an optical network data processing apparatus according to the present invention; FIG. 10 is a schematic structural diagram of an optical network data processing system according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

As shown in FIG. 2, it is a flowchart of Embodiment 1 of an optical network data processing method according to the present invention, which specifically includes:

Step S201: The OLT receives at least two types of Gigabit passive optical network transmission aggregation GTC frames;

Step S202: The OLT identifies the GTC frame according to the identifier in the physical layer overhead in the received GTC frame, and determines whether the received GTC frame is from an ONU supporting the original protocol or an ONU supporting the new protocol.

Step S203: The OLT performs corresponding processing on the GTC frame according to the recognition result.

After the OLT determines the protocol type supported by the ONU that sends the GTC frame, the OLT processes the received GTC frame by using the corresponding processing mode of the protocol type supported by the ONU.

As shown in FIG. 3, the flowchart of the second embodiment of the optical network data processing method of the present invention is based on the steps of the first embodiment. In this embodiment, step S202 specifically includes: Step S312: The OLT parses the received GTC frame. Obtain an identifier;

Step S313: The OLT performs judgment according to the identifier, and if it is the first GTC frame, Step S314, otherwise step S315;

Step S203 specifically includes:

Step S314: The OLT receives the first GTC frame in the first channel, and performs step S316; Step S315: The OLT receives the second GTC frame in the second channel, and performs step S317; Step S316: The OLT demultiplexes the first GTC frame Reconciliation encapsulation;

Step S317: The OLT demultiplexes and decapsulates the second GTC frame.

Step S310 may be further included before step S312: the OLT encapsulates and multiplexes the first GTC frame and the second GTC frame respectively;

Step S311 may also be included between step S310 and step S312: The OLT sets an identifier in a reserved bit of the physical layer overhead in the first GTC frame.

Specifically, the first GTC frame may be an optical network unit GTC frame supporting a new protocol, and the second GTC frame may be a GTC frame of an optical network unit supporting the original protocol.

In order to protect the existing investment, it is impossible to completely replace the original GPON equipment, but to expand or upgrade the original GPON system. The original ONU supports the original protocol. The expansion or upgrade of the new ONU will support the address. The extended new protocol, so there are ONUs supporting the original protocol and ONUs supporting the new protocol in the network, and the OLT needs to identify the GTC frames sent by the ONUs supporting the two protocol types.

For the uplink frame, the unicast mode is sent to the OLT for the ONU that supports the original protocol and the ONU that supports the new protocol. For the GTC frame sent by the ONU that supports the original protocol, the original ONU encapsulation format is used first. Encapsulate, generate a Gigabit Passive Optical Network Encapsulation (GEM) frame, and then multiplex the passive optical network encapsulation frame into a Gigabit PON Transmission Convergence (GTC) In the frame, if there is also a physical layer management and maintenance (Physical Layer 0 AM, PLOAM) message upload, the PLOAM message is also multiplexed into the GTC frame, and finally the uplink GTC of the ONU supporting the original protocol is generated. For a GTC frame sent by an ONU that supports the new protocol, the ONU encapsulation format supporting the new protocol is first encapsulated to generate a passive optical network encapsulation frame under the new protocol, and then the passive protocol under the new protocol is used. The optical network encapsulated frame is multiplexed into the passive optical network transmission aggregation frame under the new protocol, if there is also a physical under the new protocol If the layer operation management and maintenance message is uploaded, the PLOAM message under the new protocol is also multiplexed into the GTC frame under the new protocol, and then the reserved bit of the physical layer overhead of the GTC frame under the new protocol is set to the identifier A, and finally generated. The upstream GTC frame of the ONU supporting the new protocol.

FIG. 4 is a schematic diagram of a frame structure of an uplink GTC frame supporting a new protocol in the second embodiment of the optical network data processing method according to the present invention. The frame structure includes: PLOu is an uplink physical layer overhead, and Payload is a payload, where PLOu includes a preamble. Code Preamble, delimiter Delimiter, interleave parity BIP, port number NG-ONU-ID of ONU supporting new protocol, indicating information field Ind, bitO-bit4 in the Ind field is reserved unused bits Therefore, the unused bit can be used as an identifier bit, and the OLT can set an identifier in the flag bit. Since the reserved bit can be one bit or multiple bits, the flag A can also be set to one or more bits, and the flag A can be set by itself.

Two receiving channels are respectively set in the OLT, and the two receiving channels respectively receive uplink GTC frames sent from the ONU supporting the original protocol and the ONU supporting the new protocol. When receiving an uplink GTC frame sent from an ONU supporting the original protocol and an ONU supporting the new protocol, the OLT first parses the uplink GTC frame from the reserved bits of the physical layer overhead of the uplink GTC frame. The bit information of the passive optical network transmission aggregation frame is obtained in the bitO-bit 4, and if the acquired identification information matches the preset identifier A, the OLT can determine that the current uplink GTC frame is from the ONU supporting the new protocol. The OLT then forwards the GTC frame to the first channel corresponding to the ONU supporting the new protocol, and performs the uplink GTC frame in the uplink channel using the uplink GTC frame format in the new protocol corresponding to the ONU supporting the new protocol. Demultiplexing and decapsulation processing, the OLT finally obtains the PLOAM message under the new protocol (if there is a PLOAM message upload under the new protocol) and the GTC frame initially sent by the ONU supporting the new protocol.

If the identifier information obtained by the OLT does not match the preset identifier A, the OLT can determine that the uplink GTC frame is from the ONU supporting the original protocol, and then the OLT forwards the uplink GTC frame to the ONU supporting the original protocol. Corresponding second channel, in the

Decapsulation; finally the OLT obtains the PLOAM message under the original protocol (if there is an original agreement) The PLOAM message uploaded under the protocol) and the GTC frame sent by the ONU supporting the original protocol.

By setting the identifier in the reserved bits of the physical layer overhead of the uplink GTC frame supporting the new protocol, the OLT can distinguish between the ONU supporting the original protocol and the ONU supporting the new protocol after the expansion or upgrade. Specifically, the OLT obtains the identifier by parsing the uplink GTC frame, and identifies the ONU that supports the original protocol and the ONU that supports the new protocol after the expansion or upgrade, so that the OLT can adopt different processing according to different protocol types supported by the ONU. In this manner, the GTC frame and the control message sent from the ONU supporting the original protocol and the ONU that supports the new protocol after the expansion or upgrade are respectively obtained, and the coexistence of the ONUs supporting the two protocol types is realized.

As shown in FIG. 5, it is a flowchart of the third embodiment of the optical network data processing method of the present invention. The embodiment is also based on the first embodiment. After the step S203, the method may further include:

Step S521: The OLT sets a first identifier in a reserved bit of the physical layer overhead of the first GTC frame; and sets a second identifier in the reserved bit of the physical layer overhead of the second GTC frame.

Step S522: The ONU obtains the identifier of the received GTC frame and determines whether the identifier is the first identifier. If the identifier is the first identifier, step S523 is performed, if not, the step S524 is performed;

Step S523: The ONU receives the first GTC frame.

Step S524: The ONU discards the second GTC frame.

Specifically, the first GTC frame may be an optical network unit GTC frame supporting a new protocol, and the second GTC frame is an optical network unit GTC frame supporting the original protocol.

The GTC frame sent from the OLT to the ONU supporting the original protocol and the ONU supporting the new protocol is a downlink frame, and the transmission mode is a broadcast mode. When the first GTC frame is an optical network unit GTC frame supporting the new protocol (that is, the GTC frame sent by the OLT to the ONU supporting the new protocol), the second GTC frame is an optical network unit GTC frame supporting the original protocol (ie, the OLT sends to the OLT) When the GTC frame of the ONU of the original protocol is supported, the OLT encapsulates the first GMT frame sent by the OLT to the ONU supporting the new protocol by using the downlink GEM frame format of the new protocol, and then generates a first GEM frame supporting the new protocol, and then GEM frame under the new protocol The PLOAM message in the new protocol is multiplexed into the GTC frame under the new protocol when the PLOAM message is sent to the new protocol, and the first protocol under the new protocol is generated. The downlink GTC frame; and the OLT uses the reserved bit of the physical layer overhead in the downlink GTC frame of the new protocol, and sets the identifier A of the first downlink GTC frame in the new protocol, as shown in FIG. The frame structure diagram of the first downlink GTC frame in the new protocol in the third embodiment of the optical network data processing method of the present invention includes a downlink physical layer control block PCBd and a payload Payload, wherein the PCBd includes a physical layer synchronization Psync and an indication superframe Ident. Or, the error correction code FEC Ind, the multiframe counter, and the reserved bit are included in the indication superframe Ident, and the identifier A may be set in the reserved bit in the downlink GTC frame under the new protocol, to identify the new protocol. The type of the downstream GTC frame.

In addition, the OLT encapsulates the second GTC frame sent by the OLT to the ONU supporting the original protocol by using the GEM frame format of the original protocol to obtain the GEM frame in the original protocol, and multiplexes the GEM frame into the original protocol. In the downlink GTC frame, if the PLOAM message is sent to the GTC frame in the original protocol, the second downlink GTC frame is generated, and the second downlink GTC frame is generated. The identifier B of the downlink GTC frame is set in the reserved bit of the frame using the physical layer overhead, and the specific setting method is the same as the setting method of the GTC frame in the new protocol.

The ONU can simultaneously parse the downlink GTC frame under the original protocol and the downlink GTC frame under the new protocol. For the downlink GTC frame under the original protocol, the ONU supporting the original protocol can be correctly followed. The parsing format parses the downlink GTC frame in the original protocol. For the downlink GTC frame in the new protocol, the ONU that supports the original protocol uses the wrong parsing, which causes the important field parsing to fail. The ONU supporting the original protocol can determine the ONU of the new protocol by judging whether the parsing result is correct. Once it is determined that the downlink GTC frame is sent by the OLT to the ONU supporting the original protocol, the ONU supporting the original protocol is Receiving the downlink GTC frame, and performing a series of processing including demultiplexing and decapsulating, and the ONU supporting the original protocol also discards the downlink GTC frame in the new protocol, so the ONU supporting the original protocol only retains The part of the GTC frame and control message sent by the OLT to itself; when supporting the new association When the ONU of the conference receives the downlink GTC frame under the original protocol and the downlink GTC frame under the new protocol, it first parses the indication flag. When the identifier is identified as the identifier B, the ONU supporting the new protocol can determine the GTC. The frame is sent by the OLT to the ONU supporting the original protocol without further parsing but directly filtered and discarded. When the parsed identifier is the identifier A, the ONU supporting the new protocol can determine the GTC frame. It is sent by the OLT to itself to continue parsing the GTC frame. The parsing process includes demultiplexing and decapsulation processes as opposed to the above encapsulation and multiplexing, and finally obtains the GTC frame sent by the OLT to the ONU supporting the new protocol. Control messages.

The ONU that supports the original protocol can directly identify the frame structure of the two protocol types and the analysis format corresponding to the ONU supporting the original protocol, and then determine whether the analysis result is correct, so that the ONU supporting the original protocol can be identified. The OLT sends the GTC frame to its own and discards the OLT to send the ID to the ONU of the new protocol supporting the new protocol. The ONU that supports the new protocol can distinguish the downlink GTC frames of the two protocol types. The downstream GTC frame carrying the ONU identifier supporting the original protocol is directly discarded, so that the ONU supporting the original protocol and the ONU supporting the new protocol can each identify the GTC frame and control message sent by the OLT to the network, thereby ensuring the network. Coexistence of ONUs of two protocol types does not send message collisions. Moreover, the identifier can also enable the ONU supporting the new protocol to automatically filter the downlink GTC frame that does not belong to itself, thereby improving the message processing efficiency.

FIG. 7 is a flowchart of Embodiment 4 of the optical network data processing method of the present invention. The fourth embodiment is based on the first embodiment. Step S202 in the first embodiment may be specifically: Step S730: The OLT receives the received The first GTC frame and the second GTC frame are parsed in the first parsing format in the first channel, and the second parsing format is parsed in the second channel in the second GTC frame and the second GTC frame.

Step S731: The OLT checks the parsed GTC frame. Specifically, the result of the checksum of the parsed GTC frame by the ONU is: the first GTC frame parsed by the ONU after being parsed by the first parsing format is successfully verified; the first GTC frame parsing after parsing by the second parsing format fails; The second GTC frame parsed after the second parsing format is successfully verified; The second GTC frame check after parsing of the first parsing format fails.

Step S203 may specifically be:

Step S732: The OLT determines whether the verification is successful. If successful, step S733 is performed; otherwise, step S734 is performed;

Step S733: The OLT receives the GTC frame.

Step S734: The OLT discards the GTC frame.

In some cases, the padding value in the reserved bit of the ONU that supports the original protocol is not determined. Therefore, in this embodiment, the identifier is not set, but is identified by parsing and verifying the received uplink GTC frame.

Specifically, the first GTC frame is an optical network unit GTC frame supporting the new protocol (that is, the first uplink GTC frame sent to the OLT by the ONU supporting the new protocol), and the second GTC frame is an optical network supporting the original protocol. The unit GTC frame (that is, the second uplink GTC frame sent to the OLT by the ONU supporting the original protocol). The specific parsing process is as follows: The OLT sets two receiving channels, and when the first uplink GTC frame and the second uplink GTC frame are received by the first receiving channel, in the receiving channel, the ONU corresponding to the original protocol is used. The uplink GTC frame format in the original protocol decapsulates the second uplink GTC frame to obtain the correct GEM frame in the original protocol. If the PLOAM message in the original protocol is uploaded, the PLOAM can also be demultiplexed to obtain the PLOAM. The message is demultiplexed with the original protocol; the GEM frame under the new protocol is obtained. If the PLOAM message under the new protocol is uploaded, the PLOAM message under the new protocol can be demultiplexed.

When the first uplink GTC frame and the second uplink GTC frame are received in the second receiving channel, the first uplink GTC frame is demultiplexed by using the uplink GTC frame format in the new protocol corresponding to the ONU supporting the new protocol. The uplink GEM frame under the new protocol can be demultiplexed to obtain the PLOAM message under the correct new protocol if the PLOAM message is uploaded under the new protocol, and the uplink GTC frame under the new protocol corresponding to the ONU supporting the new protocol is adopted. The format decapsulates the second uplink GTC frame to obtain an error of the uplink GEM frame under the original protocol, if there is a PLOAM message under the original protocol, The PLOAM message under the original protocol can be demultiplexed to get the error. PLOAM messages in the original protocol after demultiplexing the two receiving channels (if there is PLOAM message upload under the original protocol) and the upstream GEM frame in the original protocol, and PLOAM messages under the new protocol (if any) The PLOAM message upload under the new protocol and the uplink GEM frame under the new protocol are verified. For the first receiving channel, the PLOAM message under the new protocol obtained by demultiplexing and the GEM frame under the new protocol obtained by decapsulation are both erroneous messages and GTC frames, and therefore are discarded due to a check error. Therefore, the PLOAM message and the GEM frame under the original protocol sent by the ONU supporting the original protocol are reserved; for the second receiving channel, the PLOAM message and the decapsulation obtained by the demultiplexing of the original protocol are obtained. The GEM frames in the original protocol are all erroneous messages and GTC frames, so they are discarded due to the check error, thus retaining the PLOAM message under the new protocol and the uplink under the new protocol sent by the ONU supporting the new protocol. GEM frame.

By using two receiving channels to parse and verify the uplink GTC frame from the ONU supporting the original protocol and the ONU supporting the new protocol, the GTC frame that does not correspond to the receiving channel can be discarded, so that it does not appear in the two receiving. The channel can receive PLOAM messages of different protocol types and GEM frames at the same time, so as to ensure that only one type of PLOAM message and GEM frame are forwarded to the upper layer through one receiving channel, thereby ensuring that different ONUs in the network can coexist.

FIG. 8 is a schematic structural diagram of Embodiment 1 of an optical network data processing apparatus according to the present invention, including:

The first receiving unit 100 is configured to receive a GTC frame sent by the OLT to different types of ONUs;

The identifier unit 101 is configured to perform different identifiers on the GTC frame received by the first receiving unit 100.

The first sending unit 102 is configured to send the GTC frame identified by the identifier unit 101.

Further, the identification unit 101 can include:

The first identifier module 1010 is configured to set an identifier in a reserved bit of a physical layer overhead in the first GTC frame. Specifically, the first GTC frame is a downlink GTC frame that is sent to an ONU that supports the new protocol, and the second GTC frame is a downlink GTC frame that is sent to an ONU that supports the original protocol. First, the first receiving unit 100 receives the first downlink GTC frame and the second downlink GTC frame that are sent to the ONU that supports the original protocol and the ONU that supports the new protocol. Then, the first identity module 1010 is under the new protocol. The identifier A is set in the reserved bits bitO-bit4 of the physical layer overhead of the first downlink GTC frame, and finally the first transmitting unit 102 can send the identified first GTC frame and the unidentified second GTC frame. .

By setting the identifier in the GTC frame reserved bit by the identifier unit 101, it is possible to distinguish between the ONU that the OLT sends to support the original protocol and the downlink GTC frame that is sent to the expanded or upgraded ONU that supports the new protocol, so that The ONU that was identified at the time of identification finally realized the coexistence of ONUs of the two protocol types.

The identification unit 101 may further include:

The second identity module 1011 is configured to set a first identifier in a reserved bit of a physical layer overhead in the first GTC frame, and set a second identifier in a reserved bit of a physical layer overhead in the second GTC frame.

Specifically, the first GTC frame may be a downlink GTC frame sent by the OLT to the ONU supporting the new protocol, and the second GTC frame may be sent to the downlink GTC frame sent by the OLT to the ONU supporting the original protocol.

The first receiving unit 100 receives the first downlink GTC frame and the second downlink GTC frame sent by the OLT to the ONU supporting the original protocol and the ONU that supports the new protocol, and then the second identity module 1011 is downlinked under the new protocol. An identifier A is set in the reserved bit bit of the physical layer overhead of the GTC frame, and the first downlink GTC frame is generated, and the identifier B is set in the reserved bit bit bit-bit 4 of the physical layer overhead of the downlink GTC frame in the original protocol. The second downlink GTC frame. Finally, the first sending unit 102 can send the identified first downlink GTC frame and second downlink GTC frame.

By identifying the two types of GTC frames by the identifier unit 101, it is possible to distinguish between the ONUs that are sent by the OLT to support the original protocol and the downlink GTC frames of the ONUs that are expanded or upgraded to support the new protocol, so that subsequent identification can be performed. Judging this The GTC frame is sent to the ONU supporting the original protocol or the ONU supporting the new protocol, and finally the coexistence of the ONUs of the two protocol types is realized.

FIG. 9 is a schematic structural diagram of Embodiment 2 of an optical network data processing apparatus according to the present invention, where the apparatus includes:

The second receiving unit 200 is configured to receive at least two types of GTC frames, where the physical layer overhead of the GTC frame has different identifiers;

The identifying unit 201 is configured to identify the at least two types of GTC frames according to the identifier in the physical layer overhead in the GTC frame received by the second receiving unit 200, and the second sending unit 202 is configured to identify according to the identifier As a result, the GTC frame is transmitted to other devices for corresponding processing.

Further, the identification unit 201 includes:

The first identification module 2010 is configured to perform classification and identification according to the identifier of the received GTC frame.

Specifically, the second receiving unit 200 receives an uplink GTC frame, and the uplink GTC frame includes a second GTC frame corresponding to the ONU supporting the original protocol and a first one corresponding to the ONU supporting the new protocol with the identifier A. The first identification module 2010 in the identification unit 201 identifies the received GTC frame, and the specific identification process is: parsing and obtaining the identification information of the GTC frame, if the first identification module 2010 determines that the identification information is pre- The identifier A is determined to determine that the current uplink GTC frame is derived from the ONU supporting the new protocol, and then the second sending unit 202 forwards the GTC frame to the first channel corresponding to the ONU supporting the new protocol, in the first channel. The uplink GTC frame is demultiplexed and decapsulated by using the uplink GTC frame format under the new protocol corresponding to the ONU supporting the new protocol, and finally the OLT obtains the PLOAM message under the new protocol (if there is a new protocol) PLOAM message upload) and GTC frame initially sent by the ONU supporting the new protocol.

If the first identification module 2010 determines that the acquired identification information is not the preset identifier A, then the uplink GTC frame is determined to be derived from the ONU supporting the original protocol, and then the second sending unit 202 forwards the uplink GTC frame to The second channel corresponding to the ONU supporting the original protocol, and the original protocol corresponding to the ONU supporting the original protocol is adopted in the channel. The uplink GTC frame format of the proposed GTC frame demultiplexes and decapsulates the uplink GTC frame under the original protocol, and finally the OLT obtains the PLOAM message under the original protocol (if there is a PLOAM message upload under the original protocol) ) and GTC frames sent by ONUs that support the original protocol.

If the second receiving unit 200 receives the downlink GTC frame, the downlink GTC frame includes a first downlink GTC frame corresponding to the ONU that is sent by the OLT to support the new protocol, and a second downlink GTC corresponding to the ONU that supports the original protocol. The frame, and the identifier A has been set in the reserved bit of the first downlink GTC frame, and the identifier B is set in the reserved bit of the second downlink frame to distinguish it. The first identification module 2010 parses and obtains the identifier of the downlink GTC frame received by the second receiving unit 200. When the identifier is identified as the identifier B, the first identification module 2010 can determine that the GTC frame is sent by the OLT to support the original. The ONU of the protocol, the second sending unit 202 can directly send the received GTC frame to the ONU supporting the original protocol, and the ONU supporting the original protocol can analyze and judge the GTC frame by itself, if the GTC frame format is parsed. If it is correct, it is the second downlink GTC frame and is received. If the error is the first downlink GTC frame and discarded, and when the identifier identified by the first identification module 2010 is the identifier A, the first identification module 2010 can determine The GTC frame is sent by the OLT to the ONU supporting the new protocol, so that the second sending unit 202 can directly send the received GTC frame to the ONU supporting the new protocol, and enable the ONU supporting the new protocol to parse the GTC frame by itself. It is determined that if the parsed GTC frame format is correct, it is determined to be the first downlink GTC frame and received, and if it is wrong, it is determined to be the second downlink GTC frame and discarded.

The identification unit 201 identifies the identifier in the reserved bit of the GTC frame, and the GTC frame sent by the ONU is identified, so that it can be determined whether the ONU supporting the original protocol or the ONU supporting the new protocol is sent by the GTC frame. The sending module 202 sends the identified GTC frame to the corresponding first receiving channel or the second receiving channel, and the two receiving channels respectively adopt different demultiplexing and decapsulation processing methods to obtain the original protocol. ONU and GTC frames and control messages sent by ONUs that support the new protocol after expansion or upgrade, and also enable ONUs that support the original protocol. And the ONU supporting the new protocol can identify the downlink GTC frame sent by the OLT, and finally realize the coexistence of the ONUs of the two protocol types.

The identification unit 201 may also include:

The second identification module 2011 is configured to identify the received GTC frame according to the verification information.

Specifically, the second receiving unit 200 receives the uplink GTC frame, and the uplink GTC frame includes a first uplink GTC frame corresponding to the ONU supporting the original protocol and a second uplink GTC frame corresponding to the ONU supporting the new protocol. Then, the second identification module 2011 in the identification unit 201 identifies the received GTC frame, and the specific identification process is: adopting a first parsing format corresponding to the ONU supporting the original protocol to the first uplink in the first channel. The GTC frame and the second uplink GTC frame are parsed at the same time, and the first uplink GTC frame and the second uplink GTC frame are simultaneously parsed in the second channel by using the second parsing format corresponding to the ONU supporting the new protocol, for the first channel For example, the PLOAM message under the new protocol (if there is a PLOAM message upload under the new protocol) and the GEM frame under the new protocol are all erroneous messages and GTC frames, so the second sending unit 202 is under the new protocol. The GEM frame and the PLOAM message under the new protocol (if there is a PLOAM message upload under the new protocol) will discard the wrong GTC.

The PLOAM message (if there is a PLOAM message upload under the original protocol) and the uplink GEM frame under the original protocol, and sent to the OLT, for the second channel, the PLOAM message under the original protocol obtained by the parsing (if there is The PLOAM message uploading under the original protocol and the GEM frame in the original protocol are all erroneous messages and GTC frames, so the second sending unit 202 sends the GEM frame under the original protocol and the PLOAM message under the original protocol (if There is a PLOAM message upload under the original protocol. After the check is judged, it will be discarded, and the PLOAM message under the new protocol sent by the ONU supporting the new protocol will be retained (if there is a PLOAM message upload under the new protocol) And the upstream GEM frame under the new protocol, and sent to the OLT.

Obtaining ONUs from the original protocol and ONUs supporting the new protocol by parsing the received uplink GTC frames in the two channels simultaneously in the identification unit As a result of parsing the GTC frame, only one correct GTC frame format can be obtained in each channel, and then the second transmitting unit performs verification processing on the parsing result and transmits, so that the discarding does not correspond to the receiving channel. The GTC frame does not appear in the case where the two receiving channels receive the uplink GEM frames of different protocol types at the same time. If there is a PLOAM message upload, the PLOAM messages of different protocol types are not simultaneously received in the two receiving channels. The situation ensures that only one PLOAM message under the original protocol (if there is a PLOAM message upload under the original protocol) and the upstream GEM frame under the original protocol or only the PLOAM message under the new protocol are passed through a receiving channel (if The PLOAM message upload under the new protocol and the upstream GEM frame under the new protocol are forwarded to the upper layer, thereby ensuring that the ONUs of different protocol types in the network can coexist.

As shown in FIG. 10, it is a schematic structural diagram of an optical network data processing system according to the present invention, and the system includes:

The optical line terminal device 300 is configured to identify and send the aggregate GTC frame of the downlink Gigabit passive optical network that is sent to different types of ONUs, or identify the received at least two types of uplink GTC frames;

The optical network unit 301 is configured to identify the downlink GTC frame according to the identifier in the physical layer overhead in the received GTC frame, or identify and send the uplink GTC frame.

Further, the optical line termination device 300 includes:

The first optical line termination module 3000 is configured to identify and send the downlink GTC frame sent to different types of ONUs;

The second optical line termination module 3001 is configured to identify the received at least two types of uplink GTC frames.

The optical network unit device 301 includes:

The first optical network unit module 3010 is configured to identify the downlink GTC frame according to the identifier in the physical layer overhead in the received GTC frame.

The second optical network unit module 3011 is configured to identify and send the uplink GTC frame. Specifically, the first optical line termination module 3000 in the optical line termination device 300

The OLT sends the downstream GTC to the ONU supporting the original protocol and the ONU supporting the new protocol. The frame is identified and then sent to the optical network unit device 301. The first optical network unit module 3010 in the optical network unit device 301 identifies the downlink GTC frame according to the identifier in the received downlink GTC frame and can perform corresponding processing. The second optical network unit module 3011 in the optical network unit 301 identifies the uplink GTC frame sent to the OLT by the ONU supporting the original protocol and the ONU supporting the new protocol, and then sends the uplink GTC frame to the optical line terminal device 300, and the optical line terminal. After receiving the uplink GTC frame, the second optical line termination module 3001 in the device 300 can distinguish and identify the uplink GTC frame according to the identifier and perform corresponding processing. The specific identification and processing process is as described in the foregoing embodiment. Let me repeat.

By identifying and identifying the uplink GTC frame and the downlink GTC frame by the optical line termination device and the optical network unit device, respectively, the OLT can be distinguished from the ONG that supports the original protocol and the downstream GTC frame of the ONU that supports the new protocol, and supports the original protocol. The ONU conflicts, the corresponding GTC frames and messages can be obtained, so that the coexistence of ONUs of two different protocol types can be realized.

It should be noted that the foregoing embodiment only illustrates the coexistence of two ONUs of different protocol types. When there are more ONUs of different protocol types in the optical network, the above method can also be used, and only more identifiers need to be set. Bit or set more receiving channels.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by hardware or by software plus necessary general hardware platform. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several The instructions are for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.

In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

An optical network data processing method, comprising:

2. The optical network data processing method according to claim 1, wherein the at least two types of GTC frames comprise: a first GTC frame and a second GTC frame, the first GTC frame and the first The two GTC frames support different protocol types, or different frame formats, or different transmission rates, or support different upstream wavelengths, or any combination thereof.

The optical network data processing method according to claim 2, wherein before the receiving at least two types of GTC frames, the method further includes: in a reserved bit of a physical layer overhead in the first GTC frame Setting an identifier, the identifier being used to identify the first GTC frame or the second GTC frame.

The optical network data processing method according to claim 2, wherein the identifying the type of the GTC frame according to the identifier in the physical layer overhead in the received GTC frame includes:

Parsing the first GTC frame and the second GTC frame in a first parsing format in a first channel, and adopting a second parsing format in the second channel in the first GTC frame and the second GTC frame Analysis.

The optical network data processing method according to claim 4, wherein the processing the corresponding GTC frame according to the identification result comprises:

If the first GTC frame parsed by the first parsing format is successfully verified, the first GTC frame is received; otherwise, the first GTC frame is discarded; If the second GTC frame parsed by the second parsing format is successfully verified, the second GTC frame is received; otherwise, the second GTC frame is discarded.

The optical network data processing method according to claim 2, wherein, after performing the corresponding processing on the GTC frame according to the identification result, the method further comprises: physics in the first GTC frame Setting a first identifier in the reserved bit of the layer overhead; setting a second identifier in the reserved bit of the physical layer overhead in the second GTC frame; sending the first GTC frame and the second GTC frame to The downstream device is identified.

The optical network data processing method according to claim 6, wherein the processing the GTC frame according to the recognition result comprises:

Obtaining the first identifier or the second identifier, and determining, if the first identifier is, parsing the first GTC frame, and if the second identifier is, discarding the second GTC frame.

8. An optical network data processing apparatus, comprising:

a first sending unit, configured to send the GTC frame that is identified by the identifier unit.

The optical network data processing device according to claim 8, wherein the identification unit comprises:

And a first identifier module, configured to set an identifier in a reserved bit of a physical layer overhead of the first GTC frame.

The optical network data processing device according to claim 8, wherein the identification unit comprises: And a second identifier module, configured to set a first identifier in a reserved bit of a physical layer overhead of the first GTC frame, and set a second identifier in a reserved bit of a physical layer overhead of the second GTC frame.

11. An optical network data processing apparatus, comprising:

a second receiving unit, configured to receive at least two types of Gigabit passive optical network transmission aggregation GTC frames, where the physical layer overhead of the GTC frame has different identifiers;

And a second sending unit, configured to send the GTC frame to another device for performing corresponding processing according to the recognition result.

12. The optical network data processing apparatus according to claim 11, wherein the identification unit comprises:

The first identification module is configured to perform classification and identification according to the identifier of the received GTC frame.

The optical network data processing device according to claim 11, wherein the identification unit comprises:

And a second identifying module, configured to identify the received GTC frame according to the verification information.

14. An optical network data processing system, comprising:

The optical line terminal device is configured to identify and transmit the Gigabit GTC frame of the downlink Gigabit passive optical network that is sent to the ONUs of different types of optical network units, or identify the received at least two types of uplink GTC frames;

And an optical network unit, configured to identify the downlink GTC frame according to the identifier in the physical layer overhead in the received GTC frame, or identify and send the uplink GTC frame.

The optical network data processing system according to claim 14, wherein the optical network unit device comprises: a first optical network unit module, configured to identify a downlink GTC frame according to an identifier in a physical layer overhead in the received GTC frame;

The second optical network unit module is configured to identify and send the uplink GTC frame.