WO2014071639A1

WO2014071639A1 - Communication method for optical network system, system and device

Info

Publication number: WO2014071639A1
Application number: PCT/CN2012/084484
Authority: WO
Inventors: 叶振凯
Original assignee: 华为技术有限公司
Priority date: 2012-11-12
Filing date: 2012-11-12
Publication date: 2014-05-15
Also published as: CN104040914A

Abstract

Provided are a method for data communication in an optical network system, a system and a device. A first preamble, a link quality delimiter, data information and first check information are packaged into a first uplink frame through at least one optical network unit, wherein the length of the first preamble is more than the length of a second preamble for uplink service transmission, and the first check information is check information about the data information, and the first uplink frame is transmitted, so that a second optical line terminal can receive the first uplink frame and determine the link quality of a standby link by parsing the uplink frame, thereby ensuring that the second optical line terminal can learn link state information about the standby link in time, avoiding the impact on normal service communication after switching and improving the degree of user satisfaction.

Description

Communication method, system and device for optical network system

The present invention relates to the field of communications technologies, and in particular, to a communication method, system, and apparatus for an optical network system. Background technique

Passive Optical Network (PON) technology is one of the most widely used Fiber To The Home (FTTH) technologies. The existing PON includes a Broadband Passive Optical Network (BPON), a Gigabit-Capable Passive Optical Network (GPON), and an Ethernet Passive Optical Network (EPON). And 10 Gigabit-capable Passive Optical Networks (XG-P0N;).

The traditional PON system mainly includes: an optical line terminal (OLT), an optical network unit (ONU), and an optical distribution network (ODN), wherein the optical distribution network includes a backbone optical fiber. Passive optical splitter and branch fiber. The 0LT and the passive optical splitter are connected by a backbone optical fiber, and the optical splitter realizes point-to-multipoint optical power distribution and is connected to multiple 0NUs through multiple branch fibers. The direction from 0LT to 0NU is called the downlink direction, and the direction from 0NU to 0LT is called the uplink direction.

The uplink direction of the P0N system is usually a Time Division Multiple Address (TDMA) multiplexing mode. Each ONU sends an uplink data packet in the time slot specified by the 0LT. The downlink direction 0LT uses Time Division Multiplexing (TDM). The broadcast mode sends downlink data packets to the ONUs. The optical signals carrying all the ONU downlink data packets are divided into several parts at the 0DN optical splitter, and each branch fiber reaches each ONU.

The application scenario of the active/standby protection of the type B in the GPON (gigabit-capable passive optical network) system or the next-generation GPON system, that is, the XGP0N system, such as the 10G GP0N system or the 40G GP0N system. Next, the primary 0LT and the standby 0LT respectively communicate data with at least one ONU through respective ports. When the fiber link fails, the primary 0LT will detect the LOS (lost of signal) alarm; after the primary 0LT detects the L0S alarm, the primary 0LT and the standby 0LT are switched, and all 0NUs are used. Switching to the standby 0LT, the original standby 0LT is switched to become the primary 0LT, and the data communication between the 0LT and each ONU is restored through the standby link.

Currently, in the type B application scenario of the P0N system, the standby 0LT cannot obtain the link state information of the standby link. If the link quality of the standby link is abnormal, the data is not suitable for data communication. For example, packet loss of the standby link. If the rate is high, the link quality is abnormal. The primary 0LT still switches the active link to the standby link, which will cause the active/standby switchover to fail. The communication between 0LT and ONU is interrupted. Therefore, how the standby 0LT obtains the link state information of the standby link becomes the type B active and standby in the current P0N system. Problems to be solved in the protected application scenario.

Summary of the invention

In view of the above, the embodiments of the present invention provide a communication method, a system, and a device for an optical network system, which are used to solve the working state of the standby link in the existing optical network system. It may cause the problem of data communication interruption between 0LT and 0NU, thus ensuring that the standby 0LT knows the link state information of the standby link in time, avoids the impact on the normal service communication after the handover, and improves the user satisfaction.

In a first aspect, the present invention provides a communication method of an optical network system, where the communication method is applied in an optical network system, where the optical network system includes at least a first optical line terminal, a second optical line terminal, and multiple optical networks. a link between the first optical line terminal and the at least one optical network unit as a primary link, and a link between the second optical line terminal and the at least one optical network unit is a backup Link, the communication method includes:

The second optical line terminal receives the first uplink frame sent by the at least one optical network unit, where the first uplink frame includes at least: a first preamble, a link quality delimiter, data information, and a first The length of the first preamble is greater than the length of the second preamble for uplink service transmission, and the first verification information is verification information of the data information;

The second optical line terminal performs frame synchronization and frame delimitation on the first uplink frame according to the first preamble and the link quality delimiter, and parses and obtains data information and first check information. ;

The second optical line terminal determines the link quality of the standby link according to the data information obtained by the parsing and the first verification information.

In a first possible implementation manner of the first aspect, the length of the second preamble is greater than or equal to 8 bytes. With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the second optical line terminal determines, according to the data information obtained by the parsing and the first verification information, The link quality of the standby link includes:

The second optical line terminal generates second verification information according to the data information obtained by the parsing;

If the first check information is different from the second check information, determining that the link quality of the standby link is abnormal.

In conjunction with the first aspect, the first possible implementation of the first aspect, or the second possible implementation of the first aspect, in a third possible implementation, the communications method further includes:

Sending a first downlink frame, where the first downlink frame indicates that the at least one optical network terminal sends the first uplink frame. In a second aspect, the present invention provides a communication method of an optical network system, where the communication method is applied in an optical network system, where the optical network system includes a first optical line terminal, a second optical line terminal, and multiple optical networks. Unit, the first a link between the optical line terminal and the at least one optical network unit is a primary link, and a link between the second optical line terminal and the at least one optical network unit is a standby link, and the communication is Methods include:

The optical network unit encapsulates the first preamble, the link quality delimiter, the data information, and the first check information into a first uplink frame, where the length of the first preamble is greater than that used for uplink service transmission. a length of the second preamble, where the first verification information is verification information of the data information;

The optical network unit sends the first uplink frame.

In a first possible implementation manner of the second aspect, the communications method further includes:

The optical network unit acquires the data information;

The optical network unit generates the first verification information according to the acquired data information;

The optical network unit generates a first preamble of a specific length, the length of the first preamble is greater than a length of a second preamble for uplink traffic transmission, and the length of the second preamble is greater than or equal to 8 words Section.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the optical network unit, the first preamble, the link quality delimiter, the data information, and the first The encapsulating the verification information into the first uplink frame specifically includes:

The optical network unit encapsulates the first preamble in a preamble field of the first uplink frame, and encapsulates the link quality delimiter in a bounding field of the first uplink frame, where The data information is encapsulated in a data field of the first uplink frame, and the first check information is encapsulated in a check field of the first uplink frame to form the first uplink frame.

With reference to the second aspect, the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in a third possible implementation manner, the optical network unit sends the first uplink The frame specifically includes:

Transmitting the first uplink frame periodically; or

Receiving, by the first optical line terminal, a first downlink frame, where the first downlink frame indicates that the at least one optical network unit sends the first uplink frame;

And transmitting, according to the indication of the first downlink frame, the first uplink frame.

In a third aspect, the present invention provides an optical line terminal, where the optical line terminal includes:

a first transceiver unit, configured to receive a first uplink frame sent by the at least one optical network unit, where the first uplink frame includes at least: a first preamble, a link quality delimiter, data information, and a first The length of the first preamble is greater than the length of the second preamble for uplink service transmission, and the first verification information is verification information of the data information;

a parsing unit, configured to perform frame synchronization and frame delimitation on the first uplink frame according to the first preamble and the link quality delimiter, and parse and obtain data information and first check information;

a processing unit, configured to determine, according to the data information obtained by the parsing and the first verification information, a chain of the standby link Road quality.

In a first possible implementation manner of the third aspect, the length of the second preamble is greater than or equal to 8 bytes. With the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation, the processing unit specifically includes:

a second check information generating unit, configured to generate second check information according to the data information obtained by the parsing, and a determining unit, configured to: if the first check information is different from the second check information, Determining that the link quality of the standby link is abnormal.

With reference to the third aspect, the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the first transceiver unit, And being used to send the first downlink frame, where the first downlink frame indicates that the at least one optical network terminal sends the first uplink frame.

In a fourth aspect, the present invention provides an optical network unit, where the optical network unit includes:

a framing unit, configured to encapsulate the first preamble, the link quality delimiter, the data information, and the first check information into a first uplink frame, where the length of the first preamble is greater than that for uplink service transmission The length of the second preamble, the first verification information is verification information of the data information;

The second transceiver unit is configured to send the first uplink frame.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the optical network unit further includes: an acquiring unit, configured to acquire the data information;

The first check information generating unit is configured to generate the first check information according to the acquired data information.

a first preamble generating unit, configured to generate a first preamble of a specific length, where a length of the first preamble is greater than a length of a second preamble for uplink service transmission, and a length of the second preamble is greater than or Equal to 8 bytes.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, the framing unit is configured to encapsulate the first preamble in the first uplink frame. a preamble field, the link quality delimiter is encapsulated in a delimiting field of the first uplink frame, and the data information is encapsulated in a data field of the first uplink frame, where the first school is The verification information is encapsulated in a check field of the first uplink frame to form the first uplink frame.

With reference to the fourth aspect, the first possible implementation manner of the fourth aspect, or the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the second transceiver unit, Specifically, the first uplink frame is periodically sent; or the first downlink frame sent by the first optical line terminal is received, where the first downlink frame instructs the at least one optical network unit to send the The first upstream frame.

In a fifth aspect, the present invention provides an optical network system, where the optical network system includes: a first optical line terminal, a second optical line terminal, and a plurality of optical network units, the first optical line terminal and the at least a link between the optical network units is a primary link, and a link between the second optical line terminal and the at least one optical network unit is a standby link. The at least one optical network unit is configured to encapsulate the first preamble, the link quality delimiter, the data information, and the first check information into a first uplink frame, where the length of the first preamble is greater than a length of the second preamble transmitted by the uplink service, where the first check information is check information of the data information; and sending the first uplink frame;

The second optical line terminal is configured to receive a first uplink frame sent by the at least one optical network unit, and perform frame on the first uplink frame according to the first preamble and the link quality delimiter The synchronization and the delimitation of the frame, the data information and the first verification information are obtained by parsing; and the link quality of the standby link is determined according to the data information obtained by the parsing and the first verification information.

In conjunction with the fifth aspect, in a first possible implementation manner of the fifth aspect, the length of the second preamble is greater than or equal to 8 bytes.

With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in the second possible implementation manner of the fifth aspect, the second optical line terminal specifically includes:

And a processing unit, configured to determine, according to the data information obtained by the parsing and the first verification information, a link quality of the standby link.

With reference to the fifth aspect, the first possible implementation manner of the fifth aspect, or the second possible implementation manner of the fifth aspect, in a third possible implementation manner of the fifth aspect, the processing unit specifically includes:

In combination with the fifth aspect, the first possible implementation of the fifth aspect, the second possible implementation of the fifth aspect, or the third possible implementation of the fifth aspect, the fourth possibility in the fifth aspect In the implementation manner, the first transceiver unit is further configured to send a first downlink frame, where the first downlink frame indicates that the at least one optical network terminal sends the first uplink frame.

With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in the fifth possible implementation manner of the fifth aspect, the optical network unit specifically includes:

a framing unit, configured to encapsulate the first preamble, the link quality delimiter, the data information, and the first check information into a first An uplink frame, where the length of the first preamble is greater than a length of a second preamble for uplink service transmission, and the first verification information is verification information of the data information;

The second transceiver unit is configured to send the first uplink frame.

With reference to the fifth aspect, the first possible implementation manner of the fifth aspect, or the fifth possible implementation manner of the fifth aspect, in a sixth possible implementation manner of the fifth aspect, the optical network unit further includes :

An obtaining unit, configured to acquire the data information;

With reference to the fifth aspect, the first possible implementation manner of the fifth aspect, the fifth possible implementation manner of the fifth aspect, or the sixth possible implementation manner of the fifth aspect, the seventh possibility in the fifth aspect The framing unit is configured to encapsulate the first preamble in a preamble field of the first uplink frame, and encapsulate the link quality delimiter on the first uplink. Encapsulating the data in the data field of the first uplink frame, and encapsulating the first check information in a check field of the first uplink frame to form the first uplink frame.

With reference to the fifth aspect, the first possible implementation manner of the fifth aspect, the fifth possible implementation manner of the fifth aspect, the sixth possible implementation manner of the fifth aspect, or the seventh possible aspect of the fifth aspect In an eighth implementation manner of the fifth aspect, the second transceiver unit is configured to periodically send the first uplink frame; or receive the first optical line terminal to send a first downlink frame, where the first downlink frame indicates that the at least one optical network unit sends the first uplink frame.

In a sixth aspect, the present invention provides a computer system for signal processing, the actions of the computer system performing signal processing include:

a first input device, configured to receive data;

a first output device, configured to send the data;

The first memory is used to store the program, including:

a first transceiver, configured to receive a first uplink frame, where the first uplink frame includes: a first preamble, a link quality delimiter, data information, and first verification information; The length of the code is greater than the length of the second preamble for the uplink service transmission, and the first check information is the check information of the data information;

a frame parsing processor, configured to perform frame synchronization and frame delimitation on the first uplink frame according to the first preamble and the link quality delimiter, and obtain data information and first check information by parsing And determining, according to the data information obtained by the parsing and the first check information, a link quality of the standby link.

a first processor coupled to the first input device, the first output device, and the first memory, for Control execution of the program.

In a seventh aspect, the present invention provides a computer system for signal processing, and the actions of the computer system to perform signal processing include:

a second input device, configured to receive data;

a second output device, configured to send the data;

a second memory for storing the program, comprising:

a framing processor, configured to encapsulate the first preamble, the link quality delimiter, the data information, and the first check information into a first uplink frame, where the length of the first preamble is greater than that for the uplink service a length of the transmitted second preamble, where the first verification information is verification information of the data information;

The second transceiver is configured to send the first uplink frame.

And a second processor coupled to the second input device, the second output device, and the second memory for controlling execution of the program.

The at least one optical network unit encapsulates the first preamble, the link quality delimiter, the data information, and the first check information into a first uplink frame, where the length of the first preamble is greater than The length of the second preamble transmitted by the uplink service, the first check information is check information of the data information, and the first uplink frame is sent, so that the second optical line terminal can receive the first uplink By analyzing the uplink frame and determining the link quality of the standby link, the second optical line terminal in the optical network system cannot know the working status of the standby link in time, and the data communication is still interrupted after the active/standby switchover. The problem is to ensure that the second optical line terminal can know the link state information of the standby link in time, avoiding the impact on the normal service communication after the handover, and improving the user satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. Obviously, the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained from those skilled in the art without departing from the drawings.

1 is a schematic structural view of an optical network system;

2 is a schematic structural diagram of another optical network system;

3 is a flow chart of a data communication method of an optical network system;

4 is a schematic diagram of a frame structure of a first uplink frame;

5 is a flow chart of a data communication method of an optical network system;

6 is a schematic structural diagram of an optical network unit; 7 is a schematic structural view of an optical line terminal;

8 is a schematic structural diagram of a computer system;

9 is a schematic structural diagram of a first memory;

Figure 10 is a schematic structural view of another computer system;

11 is a schematic structural diagram of a second memory. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a schematic structural diagram of an optical network system according to an embodiment of the present invention. As shown in FIG. 1 , the optical network system includes: a first optical line terminal OLT1, a second optical line terminal OLT2, and a plurality of optical network units ONU, wherein the plurality of optical network units are: 0NU1, 0NU2... 0NUn (n is an integer greater than or equal to 1). The 0LT1 and the 0LT2 are respectively connected to the 0NUs through the optical distribution network 0DN, and the 0DN includes at least one splitter Splitter.

The specific structure is: 0LT1 and 0LT2 are connected to 0NU1...0NUn through Splitter. The link between the first OLT1 and each of the ONUs is a primary link, for example, the primary link is: 0LT1→Splitter→0NUl, ..., 0LT1→ Splitter→0NUn _o 0LT2 The link between the ONUs and the ONUs is a standby link. For example, the backup link is: 0LT2→Splitter→0NUl, ..., 0LT2→Splitter→0NUn. The uplink direction is: a direction of each 0NU to 0LT1 or a direction of each 0NU to 0LT2; the first uplink frame is a data frame sent by at least one ONU to 0LT2 (or a data frame sent to 0LT1 by at least one ONU); The downlink direction is: 0LT1, the direction to each 0NU, or 0LT2 to the direction of each 0NU; the first downlink frame is a data frame sent by 0LT1 to each ONU. The 0LT1 may be the primary 0LT, and the 0LT2 may be the standby 0LT.

FIG. 2 is a schematic structural diagram of another optical network system according to an embodiment of the present invention. As shown in FIG. 2, the optical network system includes: a first optical line terminal OLT1, a second optical line terminal OLT2, and a plurality of optical network units ONU, wherein the optical network units are: 0NU1, 0NU2...0NUn , ONUn+1... ONUn+L (n is an integer greater than or equal to 1, and L is an integer greater than or equal to n). The 0LT1 and the 0LT2 are respectively connected to the respective ONUs through respective optical distribution networks 0DN. The 0DN includes at least: a two-stage optical distribution network: a first level 0DN1. 1 and a first level 0DN1. 2, a second level 0DN2.1 and a second level 0DN2.2. The at least one of the 0DN1.2 includes at least a second optical splitter Splitter3, and the 0DN2.1 includes at least a second optical splitter Splitter2, at least the 0DN2.2. Including the fourth spectroscopic Splitter4.

The specific structure can be: 0LT1 is connected to 0NU1...0NUn through Splitter and Splitter2, 0LT2 is connected to ONUn+1... ONUn+L through Splitter3 and Splitter4, where Splitter2 and Splitter4 are connected to Splitterl, and Splitter2 and Splitter4 Both are connected to Splitter3 to form a mutually protected TypeB protection structure. The link between the first OLT1 and the each ONU is a primary link, and the primary link is: 0LT1→Splitterl→Splitter2→0NUl, OLT1→Splitterl→Splitter2→0NUn, or 0LT1 →Splitterl→Splitter4→0NUn+l, ..., OLT1→ Splitter 1→Splitter4→0NUn+L _; the link between the 0LT2 and the ONUs is a standby link, and the standby link may be: 0LT2→Splitter3→ Splitter4→0NUn+l, ..., 0LT2-Splitter3→Splitter4→0NUn+L, or, 0LT2→Splitter3→ Splitter2→0NUl, ..., 0LT2 ^→ Splitter3→Splitter2→0NUn. The uplink direction is: each ONU goes to 0LT1, or the direction of each ONU to 0LT2, the uplink frame is the data frame sent by each 0NU to 0LT1, or the 0NU is sent to the data frame of 0LT2; the downlink direction is: 0LT1 to each The direction of 0NU, or 0LT2 to the direction of each 0NU, the downlink frame is 0LT1 is sent to each 0NU data frame, or 0LT2 is sent to each 0NU data frame. The 0LT1 may be the primary 0LT, and the 0LT2 may be the standby 0LT.

Further, the optical network system may be a GP0N system or an XGP0N system, such as 10GP0N or 40GP0N. The XGP0N system includes: XGP0N1 system and XGP0N2 system, which are the two main alternatives of the next-generation Gigabit passive optical network NGP0N 1 (also known as "Next Generation Gigabit Passive Optical Network"). Architecture. XGP0N1 is a downlink lOGbps/uplink 2. 5Gbps asymmetric system; XGP0N2 is a symmetric system with up and down lOGbps. The XGP0N1 system is an asymmetric system, which can also be called 10GGP0N.

The embodiment of the present invention is only described by taking the ONU as an example. All the methods applicable to the 0NU are applicable to the ONT (Optical

Network Terminal, optical network terminal).

The embodiment of the invention further provides a communication method, as shown in FIG. The communication method is applied to the networking structure of the optical network system described in FIG. 1 or FIG. 2, and may include the following steps:

Step S302: The at least one ONU encapsulates the first preamble, the link quality delimiter, the data information, and the first check information into a first uplink frame. The length of the first preamble is greater than the uplink service transmission. The length of the second preamble, the first verification information is verification information of the data information.

The frame structure of the first uplink frame is shown in FIG. 4. The frame structure of the uplink frame includes at least: a preamble field, a delimiting field, a data field, and a check field. The length of each field is not limited. Each domain has special requirements, and the length is mainly based on special requirements.

The preamble field and the definite field are used for the frame synchronization and frame delimitation of the first uplink frame by the OLT2, wherein the preamble field can be represented by a preamble field, which is 0LT2 after the first uplink frame is received for clock recovery. , used to implement 0LT2 on the first The synchronization of the uplink frame; the delimiter field can be represented by a delimiter field, which is 0LT2 delimiting the frame of the received first uplink frame, that is, the alignment of the frame is implemented by 0LT2; wherein the delimitation domain can also be used to distinguish The first uplink frame and the standard-defined GTC frame or the XGTC frame, so that after receiving the first uplink frame, the OLT may identify that the first uplink frame is a specific uplink frame by using a delimiter field, the first The upstream frame is used to detect the quality of the alternate link.

Specifically, the preamble field includes at least: a first preamble and a second preamble. The second preamble is mainly 0LT and each

The preamble used for uplink traffic transmission between 0NUs can also be understood as the preamble used for normal data communication between 0LT and 0NU, which can correspond to the state table defined by the 0NU in the ITU-G.987.3 standard. The leading length used by the 0NU in the Operation State 0 (5) state, the recommended length is greater than or equal to 8 bytes; the first preamble is mainly used when ranging between 0LT and each 0NU. The preamble, corresponding to the leading length used by the 0NU in the state table of the 0NU defined in the ITU-G.987.3 standard in the Ranging State 0 (4) state, the length of the first preamble is greater than the second The length of the lead. The recommended length of the first preamble is at least 8 bytes, and may be 32 bytes or 64 bytes, or other length bytes.

The delimited field is used by the 0LT2 to delimit the frame of the received first uplink frame, indicating that the first uplink frame is started to be received. The length of the field is not limited, and the recommended length may be 32 bits. Since the first uplink frame is a customized frame between 0LT1 or 0LT2 and each ONU, the delimiting field may also be used to distinguish the first uplink frame from other standard defined uplink frames, such that 0LT1 or After receiving the first uplink frame, the LT2 can recognize that the first uplink frame is used to detect the quality of the backup link.

The data field is used to carry data information, and its length is not limited.

The check field is used to check the data information to reflect the link quality of the standby link. For example, by performing error correction on a data frame sent and received on the standby link, calculating a packet loss rate or a packet error rate of the standby link by using an algorithm, thereby measuring the link quality of the standby link, and There are many ways to verify the data information. The method is not limited to the above. Other methods such as forward error correction (FEC) or cyclic redundancy check (CRC) can be used. Applicable here, the main purpose is to measure the link quality of the standby link.

The encapsulating, by the optical network unit, the first preamble, the link quality delimiter, the data information, and the first check information into the first uplink frame specifically includes:

The optical network unit encapsulates the first preamble in a preamble field of the first uplink frame, and encapsulates the link quality delimiter in a bounding field of the first uplink frame, where The data information is encapsulated in a data field of the first uplink frame, and the first check information is encapsulated in a check field of the first uplink frame to form the first uplink frame. Further, the first uplink frame is an uplink frame format customized according to a physical layer, and the first uplink frame is also in accordance with a P0N protocol or

XGP0N protocol, can be transmitted in P0N network or XGP0N network, is used between 0LT1 or 0LT2 and each 0NU A frame that is customized to measure the quality of the alternate link and can be received and parsed by 0LT1 or 0LT2.

Step S304: The ONU sends the first uplink frame.

Further, the communication method further includes: before the first upstream frame of the 0NU encapsulation:

The 0NU acquires the data information;

The 0NU generates the first verification information according to the acquired data information;

The 0NU generates a first preamble of a specific length, the length of the first preamble is greater than a length of a second preamble for uplink traffic transmission, and the length of the second preamble is greater than or equal to 8 bytes.

The order between the above steps is not fixed.

Further, the sending, by the 0NU, the first uplink frame specifically includes:

The 0NU periodically sends the first uplink frame; or

The 0NU receives the first downlink frame sent by the first optical line terminal, and the first downlink frame indicates that the at least one optical network unit sends the first uplink frame;

The 0NU sends the first uplink frame according to the indication of the first downlink frame.

The first downlink frame may be a GTC frame, an XGTC frame, a customized frame, or a frame of another format. Specifically, the indication information in the first downlink frame, where the indication information is information indicating that the 0NU sends the first uplink frame, may be carried in an extended field of a standard defined GTC frame or an XGTC frame. The indication information may be that the downlink frame is newly defined in the physical layer between the 0LT and the ONU, and the customized first downlink frame is in accordance with the P0N protocol or the XGP0N protocol, and the customized first downlink frame mainly carries the indication. Information, and the customized first downlink frame can also be parsed by each ONU.

A method for data communication in an optical network system according to an embodiment of the present invention, the first preamble, the link quality delimiter, the data information, and the first check information are encapsulated into a first uplink frame by using an optical network unit; The length of the first preamble is greater than the length of the second preamble for uplink service transmission, the first verification information is verification information of the data information, and the optical network unit sends the first The uplink frame solves the problem that the second optical line terminal in the optical network system cannot know the working status of the standby link in time, which may cause the data communication between the 0LT and the ONU to be interrupted after the active/standby switchover, thereby ensuring the second light. The line terminal can know the link state information of the standby link in time, avoiding the impact on the normal service communication after the handover, and improving the user satisfaction.

An embodiment of the present invention further provides a communication method of an optical network system, as shown in FIG. 5. The communication method is applied to the networking structure of the optical network system described in FIG. 1 or FIG. 2, and may include the following steps:

Step S502: The OLT receives the first uplink frame sent by the at least one optical network unit, where the first uplink frame includes at least: a first preamble, a link quality delimiter, data information, and a first school The length of the first preamble is greater than the length of the second preamble for uplink service transmission, and the first verification information is verification information of the data information. The length of the second preamble is greater than or equal to 8 bytes.

For the function of the frame structure of the first uplink frame and the functions of the fields in the frame, please refer to the description of the embodiment corresponding to FIG. 4 and FIG. 4, and details are not described herein again.

Optionally, the first optical line terminal 0LT1 also receives the first uplink frame.

Step S504: The 0LT2 performs frame synchronization and frame delimitation on the first uplink frame according to the first preamble and the link quality delimiter, and parses and obtains data information and first check information.

Step S506: The 0LT2 determines the link quality of the standby link according to the data information obtained by the parsing and the first check information.

Specifically, the determining, by the 0LT2, the link quality of the standby link according to the data information obtained by the parsing and the first check information, includes:

The 0LT2 generates second verification information according to the data information obtained by the parsing;

If the first check information is different from the second check information, the 0LT2 determines that the link quality of the standby link is abnormal.

Optionally, if the first check information is the same as the second check information, the 0LT2 determines that the link quality of the standby link is normal.

For example, if the data information in the first uplink frame sent by the ONU is 0110, the parity check mode is adopted, and the ONU generates the first check information according to the data information 0110, and the first check information is 1; After the first uplink frame, after the frame synchronization and frame demarcation of the first uplink frame by using the first preamble and the link quality delimiter, the parsing obtains the data information as 0100, and the 0LT2 is obtained according to the parsing. The data information 0100 is in the same check mode as that of the ONU, and the generated second check information is 0. Then, the 0LT2 determines the standby link quality abnormality according to the first check information 1 and the second check information 0.

Further, the communication method may further include:

The 0LT2 sends a first downlink frame, where the first downlink frame indicates that the at least one optical network terminal sends the first uplink frame.

The first downlink frame may be a GTC frame, an XGTC frame, a customized frame, or a frame of another format. Specifically, the indication information in the first downlink frame, where the indication information is information indicating that the 0NU sends the first uplink frame, may be carried in an extended field of a standard defined GTC frame or an XGTC frame. The indication information may be that the first downlink frame is newly defined between the 0LT and the 0NU at the physical layer, and the customized first downlink frame also conforms to the P0N protocol or the XGP0N protocol, and the customized first The line frame mainly carries the foregoing indication information, and the customized first downlink frame can also be parsed by each ONU.

A method for data communication in an optical network system according to an embodiment of the present invention, the first uplink frame sent by the at least one optical network unit by using the first preamble is received by the second optical line terminal, where the first uplink frame includes at least a first preamble, a link quality delimiter, data information, and first verification information; the length of the first preamble is greater than that used in the upper industry Length of the second preamble transmitted, the first check information is check information of the data information; parsing the first uplink frame; and verifying according to the parsed first uplink frame The information is obtained, and the link quality of the standby link is obtained, which solves the problem that the second optical line terminal OLT2 cannot know the working status of the standby link in the optical network system, and the active/standby switchover may cause the relationship between the 0LT and the ONU. The problem of data communication interruption ensures that the second optical line terminal OLT2 can know the link state information of the standby link in time, avoids the impact on the normal service communication after the handover, and improves the user satisfaction.

An embodiment of the present invention further provides an optical network unit, and a schematic structural diagram thereof is shown in FIG. 6.

An ONU 60, specifically the location of the optical network unit 60 in the optical network system, refer to each ONU in the structural diagram of FIG. 1 or FIG. 2, and the structure of each ONU in FIG. 1 or FIG. 2 and the optical network. The unit 60 has the same structure, and the optical network unit 60 includes:

The framing unit 602 is configured to encapsulate the first preamble, the link quality delimiter, the data information, and the first check information into a first uplink frame, where the length of the first preamble is greater than that for the uplink service a length of the transmitted second preamble, where the first verification information is verification information of the data information;

The second transceiver unit 604 is configured to send the first uplink frame.

Further, the 0NU60 further includes:

An obtaining unit 606, configured to acquire the data information;

The first check information generating unit 608 is configured to generate the first check information according to the acquired data information. The first preamble generating unit 610 is configured to generate a first preamble of a specific length, where the length of the first preamble is greater than a length of a second preamble for uplink traffic transmission, and the length of the second preamble is greater than Or equal to 8 bytes.

Further, the framing unit 602 is specifically configured to encapsulate the first preamble in a preamble field of the first uplink frame, and encapsulate the link quality delimiter in the first uplink frame. a delimited field, the data information is encapsulated in a data field of the first uplink frame, and the first check information is encapsulated in a check field of the first uplink frame to form the first uplink frame .

Specifically, the frame structure of the first uplink frame is shown in FIG. 4 . The frame structure of the uplink frame includes at least: a preamble domain, a delimiting domain, a data domain, and a check domain, wherein each domain has an unlimited length, and each domain has special requirements, and the length is mainly based on a special requirement.

The preamble field and the definite field are used for the frame synchronization and frame delimitation of the first uplink frame by the OLT2, wherein the preamble field can be represented by a preamble field, which is 0LT2 after the first uplink frame is received for clock recovery. The 0LT2 is used to implement the synchronization of the first uplink frame; the delimiter field can be represented by the delimiter field, and the 0LT2 delimits the frame of the received first uplink frame, that is, the 0LT2 implements the alignment of the frame; The delimiting field can also be used to distinguish the first uplink frame from the standard defined GTC frame or the XGTC frame, so that after receiving the first uplink frame, the OLT can be identified by the delimiter field. The first uplink frame is a specific uplink frame, and the first uplink frame is used to detect the quality of the backup link. Specifically, the preamble field includes at least: a first preamble and a second preamble. The second preamble is mainly used as a preamble used for uplink service transmission between the 0LT and each ONU. It can also be understood that the preamble used for normal data communication between the 0LT and the ONU may correspond to ITU-G.987. The standard defines the leading length used by the 0NU in the 0NU state table in the operating state (Operation State) 0 (5) state, the recommended length is greater than or equal to 8 bytes; the first preamble is mainly 0LT The preamble used for ranging between each 0NU corresponds to the leading length used by the 0NU in the state table defined by the 0NU in the ITU-G.987.3 standard in the Ranging State 0 (4) state. The length of the first preamble is greater than the length of the second preamble. The recommended length of the first preamble is at least greater than 8 bytes, and may be 32 bytes or 64 bytes, or bytes of other lengths.

The data field is used to send data information, and its length is not limited.

The first uplink frame is an uplink frame format customized according to a physical layer, and the first uplink frame is also in accordance with a P0N protocol or an XGP0N protocol, and can be transmitted in a P0N network or an XGP0N network, and is 0LT1 or 0LT2 and each A frame customized between 0NU for monitoring the quality of the alternate link, which can be received and parsed by 0LT1 or 0LT2.

Further, the transceiver unit 604 is configured to periodically send the first uplink frame; or receive a first downlink frame sent by the first optical line terminal, where the first downlink frame indicates the The at least one optical network unit transmits the first uplink frame.

The first downlink frame may be a GTC frame, an XGTC frame, a customized frame, or a frame of another format. Specifically, the indication information in the first downlink frame, where the indication information is information indicating that the 0NU sends the first uplink frame, may be carried in an extended field of a standard defined GTC frame or an XGTC frame. The indication information may be that a downlink frame is newly defined between the 0LT and the 0NU at the physical layer, and the customized first downlink frame conforms to the P0N protocol or the XGP0N protocol, and the customized The first downlink frame mainly carries the foregoing indication information, and the customized first downlink frame may also be parsed by each ONU.

An optical network unit according to an embodiment of the present invention, the first preamble, the link quality delimiter, the data information, and the first check information are encapsulated into a first uplink frame by using a framing unit of the optical network unit; The length of the first preamble is greater than the length of the second preamble for uplink service transmission, the first verification information is verification information of the data information, and is sent by the transceiver unit of the optical network unit. The first uplink frame solves the problem that in the existing optical network system, the second optical line terminal OLT2 cannot know the working status of the standby link in time, which may cause the data communication between the 0LT and the ONU to be interrupted after the active/standby switchover. Therefore, the second optical line terminal can obtain the link state information of the standby link in time, avoiding the impact on the normal service communication after the handover, and improving the user satisfaction.

The embodiment of the present invention further provides an optical line terminal, as shown in FIG. 7, wherein the position of the 0LT70 in the optical network system can be referred to as 0LT2 shown in FIG. 1 or FIG.

The 0LT70 includes:

The first transceiver unit 702 is configured to receive the first uplink frame sent by the at least one optical network unit, where the first uplink frame includes at least: a first preamble, a link quality delimiter, data information, and a a check information; the length of the first preamble is greater than a length of a second preamble for uplink service transmission, and the first check information is check information of the data information;

The parsing unit 704 is configured to perform frame synchronization and frame delimitation on the first uplink frame according to the first preamble and the link quality delimiter, and obtain data information and first check information by parsing;

The processing unit 706 is configured to determine, according to the data information obtained by the parsing and the first check information, a link quality of the standby link, where the standby link is the optical line terminal and the optical network The link between the units.

The specific alternate link may be the link between 0LT2 and the at least one ONU in the optical network system of Figures 1 and 2. The length of the second preamble is greater than or equal to 8 bytes.

For details of the frame structure of the first uplink frame and the specific fields in the frame, refer to the description of the embodiment corresponding to FIG. 4 and FIG. 4, and details are not described herein again.

Further, the processing unit 706 specifically includes:

The second check information generating unit 7062 is configured to generate second check information according to the data information obtained by the parsing, and the determining unit 7064 is configured to: if the first check information and the second check information are not Similarly, it is determined that the link quality of the standby link is abnormal.

Further, the first transceiver unit 702 is further configured to send a first downlink frame, where the first downlink frame indicates that the at least one optical network terminal sends the first uplink frame.

A method for data communication in an optical network system according to an embodiment of the present invention, the first uplink frame sent by the at least one optical network unit by using the first preamble is received by the second optical line terminal, where the first uplink frame includes at least : First lead a code, a link quality delimiter, data information, and first check information; a length of the first preamble is greater than a length of a second preamble for uplink service transmission, and the first check information is The verification information of the data information; parsing the first uplink frame; obtaining the link quality of the standby link according to the parsed information of the parsed first uplink frame, and solving the problem in the optical network system The second optical line terminal 0LT2 cannot know the working status of the standby link in time, which may cause the data communication between the 0LT and the ONU to be interrupted after the active/standby switchover, thereby ensuring that the second optical line terminal 0LT2 can know the standby chain in time. The link state information of the road avoids the impact on the normal service communication after the handover, and improves the user satisfaction.

An embodiment of the present invention further relates to an optical network system. For a specific structure diagram of the system, refer to FIG. 1 or FIG. 2 and a corresponding description. The optical network system includes: a first optical line terminal 0LT1, a second optical line terminal 0LT2, and a plurality of optical network units 0NU1, ..., ONUn or 0NU1, ..., ONUn, ..., 0NUn+L.

A link between the 0LT1 and the at least one ONU is a primary link, and a link between the 0LT2 and the at least one ONU is a standby link. .

The at least one ONU is configured to encapsulate the first preamble, the link quality delimiter, the data information, and the first check information into a first uplink frame, where the length of the first preamble is greater than The length of the second preamble transmitted by the uplink service, the first check information is check information of the data information, and the first uplink frame is sent;

The 0LT2 is configured to receive a first uplink frame sent by the at least one optical network unit, and perform frame synchronization and a frame on the first uplink frame according to the first preamble and the link quality delimiter. And deciphering, obtaining the data information and the first check information; determining the link quality of the standby link according to the data information obtained by the parsing and the first check information.

Further, the length of the second preamble is greater than or equal to 8 bytes.

Further, the 0LT2 specifically includes:

Further, the processing unit specifically includes:

a second check information generating unit, configured to generate second check information according to the data information obtained by the parsing, and a determining unit, configured to: if the first check information is different from the second check information, Determining the alternate link The link quality is abnormal.

Further, the first transceiver unit is further configured to send a first downlink frame, where the first downlink frame indicates that the at least one optical network terminal sends the first uplink frame.

For a description of the specific structure of the 0LT2, refer to FIG. 7 and the description of the corresponding embodiment, and details are not described herein again.

Further, the optical network unit specifically includes:

The second transceiver unit is configured to send the first uplink frame.

Further, the optical network unit further includes:

An obtaining unit, configured to acquire the data information;

Further, the framing unit is configured to encapsulate the first preamble in a preamble field of the first uplink frame, and encapsulate the link quality delimiter in the first uplink frame. The delimiting field, the data information is encapsulated in a data field of the first uplink frame, and the first check information is encapsulated in a check field of the first uplink frame to form the first uplink frame.

Further, the second transceiver unit is configured to periodically send the first uplink frame; or receive the first downlink frame sent by the first optical line terminal, where the first downlink frame indicates The at least one optical network unit sends the first uplink frame.

For a detailed description of any one of the 0NUs, refer to the description of the embodiment corresponding to FIG. 6 and FIG. 6, which will not be described here.

An optical network system according to an embodiment of the present invention, the first preamble, the link quality delimiter, the data information, and the first check information are encapsulated into a first uplink frame by using at least one optical network unit; The length of a preamble is greater than the length of the second preamble for uplink service transmission, the first verification information is verification information of the data information, and the first uplink frame is sent, so that the second optical line The terminal can receive the first uplink frame, and determine the link quality of the standby link by parsing the uplink frame, so as to ensure that the second optical line terminal can obtain the link state information of the standby link in time, and avoid the switch after the switch. The impact of normal business communications has increased user satisfaction.

The embodiment of the present invention further provides a computer system for signal processing, wherein the computer system adopts a general computer system structure, and the actions of the computer system to perform signal processing include: a first input device 800, configured to receive data;

a first output device 802, configured to send the data;

The first memory 804 is configured to store a program, including:

The first transceiver 8042 is configured to receive the first uplink frame, where the first uplink frame includes: a first preamble, a link quality delimiter, data information, and first check information; The length of the preamble is greater than the length of the second preamble for uplink service transmission, and the first verification information is verification information of the data information;

a frame parsing processor 8044, configured to perform frame synchronization and frame delimitation on the first uplink frame according to the first preamble and the link quality delimiter, and obtain data information and a first check by parsing Information: determining, according to the data information obtained by the parsing and the first verification information, a link quality of the standby link.

The first processor 806 is coupled to the first input device 800, the first output device 802, and the first memory 804 for controlling execution of the program.

In particular, the computer system may in particular be a processor based computer such as a general purpose personal computer (PC), a portable device such as a tablet computer, or a smart phone. The computer system includes a bus, a first processor 806, a first memory 804, a communication interface 806, a first input device 800, and a first output device 802. The bus can include a path to transfer information between various components of the computer. The first processor 806 can be a general purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the inventive program. The computer system also includes one or more memories, which may be read-only memory (ROM) or other types of static storage devices that store static information and instructions, random access memory (RAM) or may be stored. Other types of dynamic storage devices for information and instructions may also be disk storage. These memories are connected to the processor via a bus.

The first input device 800 includes a device for receiving data and information input or output by a user, such as a keyboard, a mouse, a camera, a scanner, a light pen, a voice input device, a touch screen, and the like. The first output device 802 can include a device to allow output of information to a user, including a display screen, a printer, a speaker, and the like. The computer system also includes a communication interface 808 that uses devices such as any transceiver to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), and the like.

The first memory 804, such as a RAM, stores a program for executing the solution of the present invention, and may also store an operating system and other applications. The stored program or program code for carrying out the inventive arrangement is stored in a memory and controlled by the processor for execution.

As shown in FIG. 9, the program for executing the solution of the present invention in the first memory specifically includes a first transceiver 8042 and a frame parsing processor 8044. (Note, the purpose of this section is to further refine the device related to the invention point, which can be subdivided according to different situations) The first transceiver 8042 is configured to receive the first uplink frame, where the first uplink frame includes: a first preamble, a link quality delimiter, data information, and first check information; The length of the preamble is greater than the length of the second preamble for uplink service transmission, and the first verification information is verification information of the data information;

The signal processing computer system can be applied to 0LT2 as shown in FIG.

The embodiment of the present invention further provides a computer system for signal processing. As shown in FIG. 10, the computer system adopts a general computer system structure, and the actions of the computer system to perform signal processing include:

a second input device 1000, configured to receive data;

a second output device 1002, configured to send the data;

The second memory 1004 is configured to store a program, including:

The framing processor 10042 is configured to encapsulate the first preamble, the link quality delimiter, the data information, and the first check information into a first uplink frame, where the length of the first preamble is greater than The length of the second preamble of the service transmission, where the first verification information is verification information of the data information;

The second transceiver 10044 is configured to send the first uplink frame.

The second processor 1006 is coupled to the second input device, the second output device, and the second memory for controlling execution of the program.

In particular, the computer system may in particular be a processor based computer such as a general purpose personal computer (PC), a portable device such as a tablet computer, or a smart phone. The computer system includes a bus, a processor, a memory, a communication interface, an input device, and an output device. The bus can include a path to transfer information between various components of the computer. The second processor may be a general purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present invention. The computer system also includes one or more memories, which may be read-only memory (ROM) or other types of static storage devices that store static information and instructions, random access memory (RAM) or may be stored. Other types of dynamic storage devices for information and instructions may also be disk storage. These memories are connected to the processor via a bus.

The first input device 1000 includes a device for receiving data and information input or output by a user, such as a keyboard, a mouse, a camera, a scanner, a light pen, a voice input device, a touch screen, and the like. The first output device 1002 can include a device to allow output of information to a user, including a display screen, a printer, a speaker, and the like. The computer system also includes a communication interface 1008 that uses devices such as any transceiver to communicate with other devices or communication networks, such as Ethernet Network, radio access network (RAN), wireless local area network (WLAN), etc.

The second memory 1004, such as RAM, stores a program for executing the solution of the present invention, and may also store an operating system and other applications. The stored program or program code for carrying out the inventive arrangement is stored in a memory and controlled by the processor for execution.

The program for carrying out the solution of the present invention in the first memory as shown in FIG. 11 specifically includes a framing processor 10042 and a second transceiver 10044. (Note, the purpose of this section is to further refine the device associated with the invention, which can be subdivided according to different situations)

The framing processor 10042 is configured to encapsulate the first preamble, the link quality delimiter, the data information, and the first check information into a first uplink frame, where the length of the first preamble is greater than The length of the second preamble transmitted by the uplink service, where the first check information is check information of the data information;

The second transceiver 10044 is configured to send the first uplink frame.

The signal processing computer system can be applied to any of the optical network units as shown in FIG. 1 or FIG. 2.

Through the description of the above embodiments, it will be apparent to those skilled in the art that the present invention can be implemented in hardware, firmware implementation, or a combination thereof. When implemented in software, the functions described above may be stored in or transmitted as one or more instructions or code on a computer readable medium. Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A storage medium may be any available media that can be accessed by a computer. By way of example and not limitation, the computer readable medium can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used to carry or store an instruction or data structure. The desired program code and any other medium that can be accessed by the computer. Also. Any connection may suitably be a computer readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwaves are included in the fixing of the associated media. As used in the present invention, a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disc, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

In summary, the above description is only a preferred embodiment of the technical solution of the present invention, and is not intended to limit the scope of protection 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

1. A communication method for an optical network system. The communication method is applied in an optical network system. The optical network system at least includes a first optical line terminal, a second optical line terminal and a plurality of optical network units. The third optical network unit The link between an optical line terminal and the at least one optical network unit is a primary link, and the link between the second optical line terminal and the at least one optical network unit is a backup link, characterized by The communication method includes:

The second optical line terminal receives the first uplink frame sent by the at least one optical network unit; wherein the first uplink frame at least includes: a first preamble, a link quality delimiter, data information and a first Verification information; The length of the first preamble is greater than the length of the second preamble used for uplink service transmission, and the first verification information is the verification information of the data information;

The second optical line terminal performs frame synchronization and frame delimitation on the first uplink frame according to the first preamble and the link quality delimiter, and parses to obtain data information and first verification information. ;

The second optical line terminal determines the link quality of the backup link based on the data information obtained by the analysis and the first verification information.

2. The communication method according to claim 1, characterized in that the length of the second preamble is greater than or equal to 8 bytes.

3. The communication method according to claim 1, wherein the second optical line terminal determines the link quality of the backup link based on the data information obtained by the analysis and the first verification information including:

The second optical line terminal generates second verification information based on the data information obtained by the analysis; if the first verification information and the second verification information are different, the second optical line terminal It is determined that the link quality of the backup link is abnormal.

4. The communication method according to claim 1, characterized in that, the communication method further includes: sending a first downlink frame, the first downlink frame instructs the at least one optical network terminal to send the first Uplink frame.

5. A communication method of an optical network system, the communication method is applied in an optical network system, the optical network system includes a first optical line terminal, a second optical line terminal and a plurality of optical network units, the first The link between the optical line terminal and the at least one optical network unit is a main link, and the link between the second optical line terminal and the at least one optical network unit is a backup link, characterized in that , the communication method includes: the optical network unit encapsulates the first preamble, link quality delimiter, data information and first verification information into a first uplink frame; wherein, the length of the first preamble Greater than the length of the second preamble used for uplink service transmission degree, the first verification information is the verification information of the data information; the optical network unit sends the first uplink frame.

6. The communication method according to claim 5, characterized in that, the communication method further includes: the optical network unit obtains the data information; the optical network unit generates the first data information according to the obtained data information. A verification information; The optical network unit generates a first preamble of a specific length, the length of the first preamble is greater than the length of the second preamble used for uplink service transmission, and the length of the second preamble is greater than Or equal to 8 bytes.

7. The communication method according to claim 5, wherein the optical network unit encapsulates the first preamble, the link quality delimiter, the data information and the first verification information into the first uplink frame. : The optical network unit encapsulates the first preamble in the preamble field of the first uplink frame, encapsulates the link quality delimiter in the delimiter field of the first uplink frame, and encapsulates the link quality delimiter in the delimiter field of the first uplink frame. The data information is encapsulated in the data field of the first uplink frame, and the first verification information is encapsulated in the verification field of the first uplink frame to form the first uplink frame.

8. The communication method according to claim 5, wherein the optical network unit sending the first uplink frame specifically includes:

Send the first uplink frame periodically; or,

Receive a first downlink frame sent by the first optical line terminal, the first downlink frame instructs the at least one optical network unit to send the first uplink frame;

The first uplink frame is sent according to the indication of the first downlink frame.

9. An optical line terminal, characterized in that, the optical line terminal includes:

The first transceiver unit is configured to receive the first uplink frame sent by the at least one optical network unit; wherein the first uplink frame at least includes: a first preamble, a link quality delimiter, data information and a first Verification information; The length of the first preamble is greater than the length of the second preamble used for uplink service transmission, and the first verification information is the verification information of the data information;

An analysis unit, configured to perform frame synchronization and frame delimitation on the first uplink frame according to the first preamble and the link quality delimiter, and analyze to obtain data information and first verification information;

A processing unit, configured to determine the link quality of the backup link based on the data information obtained by the analysis and the first verification information, wherein the backup link is the optical line terminal and the optical network unit links between.

10. The optical line terminal according to claim 9, characterized in that the length of the second preamble is greater than or equal to 8 bytes.

11. The optical line terminal according to claim 9, wherein the processing unit specifically includes: a second verification information generation unit, configured to generate second verification information based on the data information obtained by the analysis; A determining unit configured to determine that the link quality of the backup link is abnormal if the first verification information and the second verification information are different.

12. The optical line terminal according to claim 9, characterized in that the first transceiver unit is further configured to send a first downlink frame, and the first downlink frame instructs the at least one optical network terminal to send The first uplink frame.

13. An optical network unit, characterized in that, the optical network unit includes:

Framing unit, used to encapsulate the first preamble, link quality delimiter, data information and first verification information into a first uplink frame; wherein, the length of the first preamble is longer than that used for uplink service transmission The length of the second preamble, the first verification information is the verification information of the data information;

The second transceiver unit is used to send the first uplink frame.

14. The optical network unit according to claim 13, characterized in that, the optical network unit further includes: an acquisition unit, used to acquire the data information;

A first verification information generating unit, configured to generate the first verification information according to the acquired data information. A first preamble generation unit, configured to generate a first preamble of a specific length, where the length of the first preamble is greater than the length of the second preamble used for uplink service transmission, and the length of the second preamble is greater than or Equal to 8 bytes.

15. The optical network unit according to claim 13, characterized in that the framing unit is specifically configured to encapsulate the first preamble in the preamble field of the first uplink frame, and The path quality delimiter is encapsulated in the delimitation field of the first uplink frame, the data information is encapsulated in the data field of the first uplink frame, and the first verification information is encapsulated in the first uplink frame. The check field of the frame forms the first uplink frame.

16. The optical network unit according to claim 13, characterized in that, the second transceiver unit is specifically configured to periodically send the first uplink frame; or, receive the first uplink frame sent by the first optical line terminal. The first downlink frame instructs the at least one optical network unit to send the first uplink frame.

17. An optical network system, the optical network system includes: a first optical line terminal, a second optical line terminal and a plurality of optical network units, between the first optical line terminal and the at least one optical network unit The link is the main link, and the link between the second optical line terminal and the at least one optical network unit is a backup link, characterized in that, the at least one optical network unit is used to use the second optical line terminal. a preamble, link quality delimiter, data information and first The verification information is encapsulated into the first uplink frame; wherein, the length of the first preamble is greater than the length of the second preamble used for uplink service transmission, and the first verification information is the verification information of the data information. , and transmit the first uplink frame; the second optical line terminal is used to receive the first uplink frame sent by the at least one optical network unit; according to the first preamble and the link quality delimiter , perform frame synchronization and frame delimitation on the first uplink frame, and analyze and obtain data information and first verification information; determine the backup link based on the data information and first verification information obtained by the analysis. link quality.

18. The optical network system according to claim 17, wherein the length of the second preamble is greater than or equal to 8 bytes.

19. The optical network system according to claim 17, wherein the second optical line terminal specifically includes: a first transceiver unit, configured to receive the first uplink frame sent by the at least one optical network unit; wherein , the first uplink frame at least includes: a first preamble, a link quality delimiter, data information and first verification information; the length of the first preamble is greater than the second preamble used for uplink service transmission The length of the first verification information is the verification information of the data information;

A processing unit, configured to determine the link quality of the backup link based on the data information obtained by the analysis and the first verification information.

20. The optical network system according to claim 19, wherein the processing unit specifically includes: a second verification information generation unit, configured to generate second verification information based on the data information obtained by the analysis; A determining unit configured to determine that the link quality of the backup link is abnormal if the first verification information and the second verification information are different.

21. The optical network system according to claim 19, wherein the first transceiver unit is further configured to send a first downlink frame, and the first downlink frame instructs the at least one optical network terminal to send The first uplink frame.

22. The optical network system according to claim 17, characterized in that the optical network unit specifically includes: a framing unit, used to combine the first preamble, link quality delimiter, data information and first calibration The verification information is encapsulated into the first uplink frame; wherein, the length of the first preamble is greater than the length of the second preamble used for uplink service transmission, and the first verification information is the verification information of the data information;

The second transceiver unit is used to send the first uplink frame.

23. The optical network system according to claim 22, wherein the optical network unit further includes: Acquisition unit, used to obtain the data information;

24. The optical network system according to claim 22, characterized in that the framing unit is specifically configured to encapsulate the first preamble in the preamble field of the first uplink frame, and The path quality delimiter is encapsulated in the delimitation field of the first uplink frame, the data information is encapsulated in the data field of the first uplink frame, and the first verification information is encapsulated in the first uplink frame. The check field of the frame forms the first uplink frame.

25. The optical network system according to claim 22, characterized in that, the second transceiver unit is specifically configured to periodically send the first uplink frame; or, receive the first uplink frame sent by the first optical line terminal. The first downlink frame instructs the at least one optical network unit to send the first uplink frame.

26. A computer system for signal processing, characterized in that the computer system performs signal processing actions including:

The first input device is used to receive data;

A first output device used to send the data;

The first memory is used to store programs, including:

a first transceiver, configured to receive a first uplink frame; wherein, the first uplink frame at least includes: a first preamble, a link quality delimiter, data information and first verification information; the first The length of the preamble is greater than the length of the second preamble used for uplink service transmission, and the first verification information is the verification information of the data information;

A frame parsing processor, configured to perform frame synchronization and frame delimitation on the first uplink frame according to the first preamble and the link quality delimiter, and parse to obtain data information and first verification information. ; Determine the link quality of the backup link based on the data information obtained by the analysis and the first verification information.

A first processor, coupled to the first input device, the first output device and the first memory, is used to control execution of the program.

27. A computer system for signal processing, characterized in that the computer system performs signal processing actions including:

The second input device is used to receive data;

a second output device, used to send the data;

The second memory is used to store programs, including: A framing processor, configured to encapsulate the first preamble, link quality delimiter, data information and first verification information into a first uplink frame; wherein the length of the first preamble is longer than that used for uplink services The length of the transmitted second preamble, the first verification information is the verification information of the data information;

The second transceiver is used to send the first uplink frame.

A second processor, coupled to the second input device, the second output device and the second memory, is used to control execution of the program.