CN107370688B

CN107370688B - Data transmission method and device

Info

Publication number: CN107370688B
Application number: CN201610316620.5A
Authority: CN
Inventors: 张伟良
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-05-12
Filing date: 2016-05-12
Publication date: 2022-09-27
Anticipated expiration: 2036-05-12
Also published as: CN107370688A; WO2017193711A1

Abstract

The invention provides a data transmission method and a data transmission device, wherein the method comprises the following steps: the first network node uniformly sends first data to be sent to the second network node through more than two channels; and/or the first network node receives second data from a second network node through more than two channels, wherein the second data is uniformly transmitted in more than two channels; the first network node is an optical fiber line terminal OLT, and the second network node is an optical fiber network unit ONU; or, the first network node is an optical network unit ONU, and the second network node is an optical line terminal OLT. The invention can simply and effectively send and/or receive data on multiple channels simultaneously, and ensures the integrity of the data.

Description

Data transmission method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a data transmission method and apparatus.

Background

With the rapid development of broadband services, the demand of users for access to Network bandwidth is greatly increased, and a Passive Optical Network (PON) is an important technical means for users to access at present, as shown in fig. 1, in a PON system, an Optical Line Terminal (OLT for short) is connected with an Optical splitter through a trunk Optical fiber, the Optical splitter is connected with a plurality of Optical Network units (ONU for short) through branch Optical fibers, and the OLT and the ONU communicate through a wavelength pair.

The NG-PON2 is an important branch in the PON technology evolution, and in the NG-PON2, the encapsulation process of data transmission is shown in fig. 2:

data is firstly packaged into an XGEM (XG-PON Encapsulation Method) frame, the XGEM frame comprises overhead and payload, and the overhead carries an XGEM Port identification Port ID;

a plurality of XGEM frames are encapsulated into a super frame, the super frame comprises overhead and payload, and the overhead comprises Physical Layer operation management and Maintenance (PLOAM) messages, BWmap bandwidth allocation and the like;

the superframe is processed by Forward Error Correction (FEC for short) and then packaged into a physical frame, the physical frame comprises a frame header and a payload, and the frame header is used for a receiver to detect the initial position of the physical frame.

Ethernet Passive Optical Network (EPON)/10 GEPON is another important branch of PON evolution, and the data encapsulation hierarchy is shown in fig. 3. And encapsulating the data into an MAC frame, wherein the data is used as an MAC payload, and the MAC frame also comprises an MAC overhead which comprises information such as a target address, a source address, the length of the MAC payload and the like. The MAC frame is packaged into a physical frame through processing such as coding, FEC check and the like to be used as a physical frame payload, in addition, the physical frame comprises a physical frame header, and the physical frame header comprises related information such as delimitation and the like.

In the conventional passive optical network technology, the OLT and the ONU can only communicate with each other through one wavelength pair, that is, the OLT and the ONU can only transmit data through one channel, when the bandwidth requirement of the ONU user side increases, more data need to be transmitted before the OLT and the ONU, and the conventional passive optical network cannot meet the requirement.

With the further increase of bandwidth demand and the technological development, in a PON network architecture in the related art, the OLT and the ONU may support data transmission on multiple channels simultaneously, which may increase the bandwidth between the OLT and the ONU, and may also increase the bandwidth on the ONU user side. As shown in fig. 4.

The ONU supports transmitting and receiving data on multiple channels, and the OLT also needs to support simultaneously transmitting and receiving data on multiple channels supported by the ONU in order to support such multi-channel transceiving by the ONU. How to simultaneously transmit and receive data on multiple channels by a simple and effective method has not been proposed as an effective solution in the related art.

Disclosure of Invention

Embodiments of the present invention provide a data transmission method and apparatus, so as to at least implement simple and effective simultaneous data transmission between an OLT and an ONU over multiple channels.

According to an embodiment of the present invention, there is provided a data transmission method including: the method comprises the steps that a first network node uniformly sends first data to be sent to a second network node to the second network node through more than two channels; and/or the first network node receives second data from the second network node through more than two channels, wherein the second data is uniformly transmitted in the more than two channels; the first network node is an optical fiber line terminal OLT, and the second network node is an optical fiber network unit ONU; or, the first network node is an optical network unit ONU, and the second network node is an optical line terminal OLT.

Optionally, the sending, by the first network node, the first data to be sent to the second network node through two or more channels uniformly includes: the first network node uniformly sends the first data to be sent to the second network node through more than two fixed channels; and/or the first network node receiving the second data from the second network node over two or more channels comprises: the first network node receives the second data from the second network node over two or more fixed channels.

Optionally, the sending, by the first network node, the first data to be sent to the second network node through two or more channels uniformly includes: when the channel comprises a logic channel, the first network node uniformly divides the first data into more than two sub-data and respectively encapsulates the sub-data into first data frames; the first network node sends the more than two encapsulated first data frames to the second network node through the more than two logic channels; and/or, when the channel comprises a physical channel, the first network node encapsulates the first data into a second data frame; the first network node uniformly divides the second data frame into more than two sub-data frames; and the first network node sends the more than two sub data frames to the second network node through the more than two physical channels.

Optionally, the sending, by the first network node, the encapsulated two or more first data frames to the second network node through the two or more logical channels includes: the first network node distributes more than two first data frames to more than two logic channels according to a pre-agreed mode; and transmitting the allocated two or more first data frames to the second network node through the two or more logical channels; or, the first network node adds first identification information to the more than two first data frames, where the first identification information is used to identify a position of sub-data carried in the first data frame in the first data; allocating the two or more first data frames to which the first identification information is added to the two or more logical channels; and transmitting the distributed more than two first data frames to the second network node through the more than two logic channels.

Optionally, the sending, by the first network node, the two or more sub data frames to the second network node through the two or more physical channels includes: the first network node distributes the more than two sub data frames to the more than two physical channels according to a pre-agreed mode; and sending the distributed more than two sub data frames to the second network node through the more than two physical channels; or, the first network node adds second identification information to the more than two sub data frames, where the second identification information is used to identify a position of the sub data frame in a second data frame encapsulated by the first data; distributing the more than two sub data frames added with the first identification information to the more than two physical channels; and sending the distributed more than two sub data frames to the second network node through the more than two physical channels.

Optionally, the encapsulating, by the first network node, the first data into the second data frame includes: the first network node encapsulating the first data into a payload portion of the second data frame; the first network node uniformly dividing the second data frame into two or more sub-data frames includes: the first network node uniformly divides the payload part of the second data frame into more than two sub data frame payloads; the sending, by the first network node, the two or more sub data frames to the second network node through the two or more physical channels includes: the first network node encapsulates the more than two sub data frame payloads into the more than two physical channels; the first network node sends the more than two sub data frame payloads to the second network node through the more than two physical channels, and informs the second network node of the start position of the sub data frame payload in the physical channel through at least one of the following modes: inserting a frame header into the frame starting positions of the more than two physical channels by the first network node, wherein the frame header is used for identifying the starting position of the payload of the sub data frame in the physical channels; the first network node and the second network node appoint the initial position of the sub data frame payload in the physical channel; the first network node and the second network node agree or inform the second network node that the starting position of the sub data frame payload in the physical channel is the same as the starting position of the sub data frame payload in the physical channel when the first network node transmits data to the second network node in the past, wherein the first network node periodically inserts frame headers at the frame starting positions of more than two physical channels, and the frame headers are used for identifying the starting positions of the sub data frame payloads in the physical channels.

Optionally, the receiving, by the first network node, the second data from the second network node through the two or more channels includes: when the channel comprises a logical channel, the first network node receives more than two third data frames from the second network node through the more than two channels; the first network node determines the positions of the subdata contained in the more than two third data frames in the second data, and assembles the subdata according to the determined positions to obtain the second data; and/or, when the channel includes a physical channel, the first network node receives, through the two or more channels, two or more sub data frames from the second network node, where the sub data frames are a part of a fourth data frame encapsulated by the second data; the first network node determines the positions of the more than two sub data frames in a fourth data frame formed by encapsulating the second data, and assembles the sub data frames according to the determined positions to obtain the fourth data frame formed by encapsulating the second data; and the first network node acquires the second data from a fourth data frame encapsulated by the second data.

Optionally, the determining, by the first network node, the position of the sub data included in the two or more third data frames in the second data includes: the first network node determines the positions of the subdata contained in the more than two third data frames in the second data according to a predetermined mode; or, the first network node acquires third identification information carried in the more than two third data frames; and the first network node determines the positions of the subdata contained in the more than two third data frames in the second data according to the third identification information.

Optionally, the determining, by the first network node, the position of the more than two sub data frames in a fourth data frame encapsulated by the second data includes: the first network node determines the positions of the more than two sub-data frames in a fourth data frame formed by encapsulating the second data according to a predetermined mode; or, the first network node obtains fourth identification information carried in the more than two sub-data frames; and the first network node determines the positions of the more than two sub-data frames in a fourth data frame formed by encapsulating the second data according to the fourth identification information.

Optionally, the receiving, by the first network node, the two or more sub data frames from the second network node through the two or more channels includes: the first network node determines the starting positions of the sub data frame payloads in the more than two channels by at least one of the following methods: according to the frame start positions of the more than two channels, inserting a frame header mode for determining the start positions of the payload of the sub data frames in the more than two channels; the starting position of the sub data frame payload in the physical channel is appointed with the second network node; the starting position of the sub data frame payload in the physical channel is agreed with the second network node or is informed by the second network node that the starting position of the sub data frame payload in the physical channel is the same as the starting position of the sub data frame payload in the physical channel when the second network node transmits data to the first network node in the past, wherein the second network node periodically inserts frame headers at the frame starting positions of more than two physical channels, wherein the frame headers are used for identifying the starting position of the sub data frame payload in the physical channel; and determining more than two sub data frame payloads from the second network node from the more than two channels according to the determined starting positions of the sub data frame payloads in the more than two channels.

According to another embodiment of the present invention, there is provided a data transmission apparatus, which is applied in a first network node, including: the system comprises a sending module, a receiving module and a sending module, wherein the sending module is used for uniformly sending first data to be sent to a second network node to the second network node through more than two channels; and/or a receiving module, configured to receive second data from a second network node through two or more channels, where the second data is uniformly sent in the two or more channels; the first network node is an optical fiber line terminal OLT, and the second network node is an optical fiber network unit ONU; or, the first network node is an optical network unit ONU, and the second network node is an optical line terminal OLT.

Through the above steps, since the number of the channels for data transmission between the OLT and the ONU is two or more, when data transmission is performed between the OLT and the ONU, the two or more channels can be used to transmit data at the same time, and since data is transmitted uniformly in the two or more channels, it can be ensured that one end receiving the data receives complete data (that is, it is determined that data received at the same time (or with a difference less than a predetermined time) is from the same network node, and the integrity of the received data is ensured). Compared with a data transmission mode in the related technology, the scheme in the embodiment of the invention can simply and effectively send and/or receive data on multiple channels simultaneously, and ensures the integrity of the data.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a schematic diagram of a PON architecture and topology in the related art;

fig. 2 is a schematic diagram of NG-PON2 data encapsulation in the related art;

FIG. 3 is a diagram of EPON/10GEPON data encapsulation in the related art;

fig. 4 is a schematic diagram of a multi-path PON architecture and topology;

FIG. 5 is a flow chart of a method of data transmission according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating data transmission according to a first embodiment of the present invention;

FIG. 7 is a diagram illustrating data transmission according to a second embodiment of the present invention;

FIG. 8 is a second data transmission diagram according to a second embodiment of the present invention;

FIG. 9 is a first diagram illustrating data encapsulation according to a third embodiment of the present invention;

FIG. 10 is a second schematic diagram of data encapsulation according to a third embodiment of the present invention;

fig. 11 is a block diagram of a data transmission apparatus according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The ONU supports transmitting and receiving data on multiple channels, and the OLT also needs to support simultaneously transmitting and receiving data on multiple channels supported by the ONU in order to support such multi-channel transceiving by the ONU.

Fig. 5 is a flowchart of a data transmission method according to an embodiment of the present invention, and as shown in fig. 5, the flowchart includes the following steps:

step S502, the first network node uniformly transmits first data to be transmitted to the second network node through more than two channels; and/or the presence of a gas in the gas,

step S504, a first network node receives second data from a second network node through more than two channels, wherein the second data are uniformly transmitted in the more than two channels; the first network node is an optical fiber line terminal OLT, and the second network node is an optical fiber network unit ONU; or, the first network node is an optical network unit ONU, and the second network node is an optical line terminal OLT.

The following describes how a plurality of channels are used for data transmission between a first network node and a second network node:

in an optional embodiment, the sending, by the first network node, the first data to be sent to the second network node uniformly through two or more channels includes: the first network node uniformly sends first data to be sent to a second network node to the second network node through more than two fixed channels; and/or, the receiving, by the first network node, the second data from the second network node through two or more channels includes: the first network node receives second data from the second network node over two or more fixed channels. In this embodiment, the channel for data transmission between the first network node and the second network node may be a fixed channel, and the fixed channel may be determined by negotiation between the two nodes, or may be configured in advance or defined by a protocol.

In an optional embodiment, in step S502, when the first network node uniformly sends the first data to be sent to the second network node through two or more channels, the following steps may be implemented: when the channel comprises a logical channel (for example, a logical channel such as an XGEM port), the first network node uniformly divides the first data into two or more sub-data and encapsulates the sub-data into first data frames; and the first network node sends the more than two encapsulated first data frames to the second network node through more than two logic channels. In this embodiment, when the first network node transmits the encapsulated two or more first data frames through two or more logical channels, there may be multiple transmission modes, where one transmission mode is: the data frames are sent one to one, namely, the data frames are sent through different logic channels respectively, and all the data frames which are encapsulated are sent at the same time, so that all the data frames can be ensured to be sent to the second network node side at the same time; one transmission mode is a many-to-one transmission mode, that is, multiple data frames are transmitted on one logical channel, and the number of data frames transmitted on each logical channel is the same, for example, M data frames are transmitted on M/2 logical channels, each logical channel carries 2 data frames, optionally, multiple data frames can be carried on the logical channels in a cyclic allocation manner, but other examples also can be used to implement this, for example, 4 data frames are transmitted on2 logical channels, a 1 st data frame is transmitted on logical channel 1, a 2 nd data frame is transmitted on logical channel 2, a 3 rd data frame is transmitted on logical channel 1, and a 4 th data frame is transmitted on logical channel 2.

In an optional embodiment, in step S502, when the first network node uniformly sends the first data to be sent to the second network node through two or more channels, the following method may also be implemented: when the lanes comprise physical lanes, the first network node encapsulates the first data into a second data frame (i.e., a physical frame); the first network node uniformly divides the second data frame into more than two sub-data frames; and the first network node sends more than two sub data frames to the second network node through the more than two physical channels. In this embodiment, when more than two sub data frames are sent through more than two physical channels, the allocation of resources may be determined according to the number of the sub data frames, and multiple sub data frames may be carried on the physical channels for sending in a cyclic allocation manner, for example, when the number of the physical channels is 4 and the number of the divided sub data frames is Q, the 1 st to 4 th sub data frames among Q may be carried on the 1 st to 4 th physical channels respectively for sending, and then the 5 th to 8 th sub data frames are carried on the 1 st to 4 th physical channels for sending, and so on.

In an optional embodiment, when the first network node sends the encapsulated two or more first data frames to the second network node through two or more logical channels, the following manner may be adopted: the first network node distributes more than two first data frames to more than two logic channels according to a prearranged mode; and transmitting the distributed more than two first data frames to a second network node through more than two logic channels; or, the first network node adds first identification information in more than two first data frames, where the first identification information is used to identify the position of the sub-data carried in the first data frames in the first data; distributing more than two first data frames added with the first identification information into more than two logical channels; and sending the distributed more than two first data frames to the second network node through more than two logic channels. In this embodiment, the pre-agreed manner may be a negotiation manner between the first network node and the second network node, or a protocol-specified manner, or a fixed configuration manner, for example, a first data frame of two or more first data frames may be agreed to be sent in the first logical channel, and a second data frame … … may be sent in the second logical channel, so that after the second network node receives the data frames through the logical channels, the position relationship of the sub-data carried in the multiple first data frames may be determined, and thus, complete and correct data may be obtained. Of course, in this embodiment, the position of the sub-data carried in the first data frame may also be determined by using the identification information for identification, for example, when the identification information is 00, the sub-data carried in the data frame is the sub-data of the first part in the first data, when the identification information is 01, the sub-data carried in the data frame is the sub-data of the second part in the first data, and so on.

In an optional embodiment, when the first network node sends more than two sub data frames to the second network node through more than two physical channels, the following manner may be adopted: the first network node distributes more than two sub data frames to more than two physical channels according to a predetermined mode; and, send the sub data frame more than two distributed to the second network node through the above-mentioned more than two physical channels; or, the first network node adds second identification information in more than two sub data frames, where the second identification information is used to identify the position of the sub data frame in a second data frame encapsulated by the first data; more than two sub data frames added with the first identification information are distributed into more than two physical channels; and sending the distributed more than two sub data frames to the second network node through the more than two physical channels. Similar to the foregoing embodiment, in this embodiment, the sub-data frames may also be allocated in an agreed manner or in a manner identified by the identification information.

In an optional embodiment, the encapsulating, by the first network node, the first data into the second data frame includes: the first network node encapsulating the first data into a payload portion of a second data frame; the first network node uniformly dividing the second data frame into more than two sub-data frames comprises: the first network node uniformly divides the payload part of the second data frame into more than two sub data frame payloads; the first network node sends more than two sub data frames to the second network node through more than two physical channels, and the method comprises the following steps: the first network node packs more than two sub data frame payloads into more than two physical channels; the first network node sends more than two sub data frame payloads to the second network node through more than two physical channels, and informs the second network node of the initial position of the sub data frame payload in the physical channels through at least one of the following modes: inserting a frame header at the frame starting position of more than two physical channels by a first network node, wherein the frame header is used for identifying the starting position of a payload of a sub data frame in the physical channels; the first network node and the second network node appoint the initial position of the payload of the sub data frame in the physical channel; the first network node and the second network node agree or inform the second network node that the starting position of the sub data frame payload in the physical channel is the same as the starting position of the sub data frame payload in the physical channel when the first network node transmits data to the second network node in the past, wherein the first network node periodically inserts frame headers at the frame starting positions of more than two physical channels, and the frame headers are used for identifying the starting position of the sub data frame payload in the physical channel. In this embodiment, when the first data is encapsulated into the payload portion of the data frame, the header of the data frame may not be needed, and only the payload portion may be encapsulated. In addition, in this embodiment, a frame header may be inserted into the start position of each physical channel (the frame header may be inserted into each time data is sent, or may be inserted periodically, and the start positions of the payload of the sub data frames in the physical channels during each data transmission are the same), so that a receiving party (i.e., the second network node) may find the start position of the sub data frame in each channel according to the frame header inserted into the physical channel (when the frame header is inserted periodically into the first network node, the second network node may determine the start position according to the frame header inserted into the previous physical channel), thereby splicing to obtain complete data.

The above embodiments mainly address the description of how the first network node sends data to the second network node, and the following description of how the first network node receives data from the second network node:

in an optional embodiment, in the step S504, when the first network node receives the second data from the second network node through two or more channels, the following manner may be adopted: when the channel comprises a logical channel, the first network node receives more than two third data frames from the second network node through the more than two channels; the first network node determines the positions of the data contained in the more than two third data frames in the second data, and assembles each subdata according to the determined positions to obtain the second data; and/or, second data from the second network node may also be received over more than two channels in the following manner: when the channel comprises a physical channel, the first network node receives more than two sub-data frames from the second network node through more than two channels, wherein the sub-data frames are part of a fourth data frame (namely, a physical frame) encapsulated by the second data; the first network node determines the positions of the more than two sub-data frames in a fourth data frame formed by encapsulating the second data, and assembles the sub-data frames according to the determined positions to obtain the fourth data frame formed by encapsulating the second data; and the first network node acquires the second data from a fourth data frame encapsulated by the second data.

In an optional embodiment, the determining, by the first network node, the position of the sub-data contained in the two or more third data frames in the second data includes: the first network node determines the positions of the subdata contained in the more than two third data frames in the second data according to a predetermined mode; or the first network node acquires third identification information carried in more than two third data frames; and the first network node determines the positions of the subdata contained in more than two third data frames in the second data according to the third identification information. In this embodiment, when the second network node sends the third data frame by using the channel, the third data frame may be sent in an agreed manner, or the order of each third data frame of the first network node may be informed in a manner that the sent third data frame carries identification information for identifying position information, so that the first network node determines the order of data in each third data frame, and then obtains complete and accurate data.

In an optional embodiment, the determining, by the first network node, the position of more than two sub data frames in a fourth data frame encapsulated by the second data includes: the first network node determines the positions of more than two sub-data frames in a fourth data frame formed by encapsulating the second data according to a predetermined mode; or, the first network node obtains fourth identification information carried in more than two sub-data frames; and the first network node determines the positions of more than two sub-data frames in a fourth data frame formed by encapsulating the second data according to the fourth identification information. In this embodiment, when the second network node transmits the sub-data frames through the channel, the sub-data frames may be transmitted according to an agreed manner, or the transmitted sub-data frames may carry identification information for identifying the position information to inform the first network node of the order of the sub-data frames, so that the first network node determines the order of the data in the sub-data frames, and further obtains complete and accurate data.

In an optional embodiment, the receiving, by the first network node, the two or more sub data frames from the second network node through the two or more channels includes: the first network node determines the starting positions of the sub data frame payloads in the two or more channels by at least one of the following methods: according to the frame head mode inserted in the frame start positions of the above-mentioned two or more channels for determining the start position of payload of sub data frame in the two or more channels; the initial position of the payload of the sub data frame in the physical channel is appointed with the second network node; the method comprises the steps that a starting position of a sub data frame payload in a physical channel is appointed with a second network node or is informed by the second network node that the starting position of the sub data frame payload in the physical channel is the same as the starting position of the sub data frame payload in the physical channel when the second network node transmits data to a first network node in the past, wherein the second network node periodically inserts frame headers at the frame starting positions of more than two physical channels, and the frame headers are used for identifying the starting positions of the sub data frame payloads in the physical channels; and determining more than two sub data frame payloads from the second network node from the more than two channels according to the determined initial positions of the sub data frame payloads in the more than two channels. In this embodiment, a frame header for determining a start position of a payload of a sub data frame may be inserted into a frame start position of each channel, or the frame header may be inserted periodically, and the first network node may determine the start position of the payload of the sub data frame according to the frame header.

As can be seen from the above embodiments, between the OLT and the ONUs, data frames or data are uniformly transmitted and received through a plurality of fixed channels. The channel may be a logical channel such as an XGEM port, or may also be a physical channel such as a wavelength. When the channel is a logic channel such as XGEM Port, data is uniformly transmitted and received through a plurality of fixed logic channels; when the channel is a physical channel such as a wavelength, data is first encapsulated into a data frame, and the data frame is uniformly transmitted and received over a fixed plurality of physical channels. In the uplink direction, the bandwidth allocated to the ONU by the OLT may be uniformly distributed on a plurality of fixed channels.

First, the following description will be made with reference to the first embodiment and the second embodiment, where two pairs of channels include a physical channel:

example one

In this embodiment, taking an example that 4 channels are supported between the OLT and the ONU, after the data is encapsulated and forms a physical frame (corresponding to the second data frame described above), the physical frame may be divided into 4 × N portions on average, if the data cannot be divided into 4 × N portions, the data may be supplemented into 4 × N portions by supplementing missing portions, and then the portions are distributed to 4 physical channels in block order to be transmitted, for example, the first portion is transmitted on channel 1, the second portion is transmitted on channel 2, the third portion is transmitted on channel 3, the fourth portion is transmitted on channel 4, the fifth portion is transmitted on channel 1, the sixth portion is transmitted on channel 2, the seventh portion is transmitted on channel 3, the eighth portion is transmitted on channel 4, and so on. The receiver (when the sender is OLT, the receiver is ONU; when the sender is ONU, the receiver is OLT) respectively receives each channel data by 4 parts and 4 parts according to the channel sequence, then searches the physical frame head and analyzes the payload of the physical frame. Fig. 6 shows an example in which a physical frame is divided into 4 blocks, and transmission and reception are performed on 4 channels, respectively.

As shown in fig. 6, for example, ITU-T (International Telecommunications Union-Telecommunications standardization sector) encapsulation and data transceiving are performed, each piece of data is encapsulated into an XGEM frame, each piece of data is encapsulated as an XGEM payload, each XGEM frame is encapsulated into a superframe as a superframe payload, the superframe is encapsulated into a physical frame as a physical frame payload after being subjected to FEC and other related processing, and the physical frame is divided into 4 sub-physical frames (corresponding to the above sub-data frames) and transmitted on channels 1, 2, 3 and 4, respectively. The receiving party respectively takes out the sub-physical frames with the same size from the same positions of the channels 1, 2, 3 and 4, according to the sending rule, the sub-physical frame taken out from the channel 1 is placed at the forefront, the sub-physical frame taken out from the channel 2 is placed at the second position, the sub-physical frame taken out from the channel 3 is placed at the third position, the sub-physical frame taken out from the channel 4 is placed at the end to form a finished physical frame, the physical frame head is checked, and the physical frame payload, the super-frame payload and the XGEM payload are sequentially analyzed until the data are analyzed.

Example two

In this embodiment, taking an example that 4 channels are supported between the OLT and the ONU, after the data is encapsulated and forms a physical frame (corresponding to the second data frame), the physical frame may be divided into 4 × N parts on average, if the data cannot be divided into 4 × N parts, the data may be supplemented into 4 × N parts by means of supplementing missing parts, and then the parts are distributed to 4 physical channels in block order for transmission, a physical frame header (corresponding to the frame header) is inserted into the starting position of the sub-physical frame of each channel, for example, a first part is transmitted in channel 1, a second part is transmitted in channel 2, a third part is transmitted in channel 3, a fourth part is transmitted in channel 4, a fifth part is transmitted in channel 1, a sixth part is transmitted in channel 2, a seventh part is transmitted in channel 3, an eighth part is transmitted in channel 4, and so on. The receiver (when the sender is OLT, the receiver is ONU; when the sender is ONU, the receiver is OLT) can find the starting of the sub-physical frame in each channel according to the physical frame header on each channel, and the starting position of the whole physical frame can be obtained after splicing the sub-physical frames. The physical frame header of the original physical frame is not actually required, but of course, the physical frame header of the original physical frame is still maintained, and the physical frame header can be searched like the receiver in the first embodiment after the physical frame splicing is completed.

As shown in fig. 7, for example, ITU-T encapsulation and data transceiving are performed, each piece of data is encapsulated into an XGEM frame, each piece of data is encapsulated as an XGEM payload, then each XGEM frame is encapsulated into a superframe as a superframe payload, the superframe is subjected to relevant processing such as FEC and the like and then encapsulated into a physical frame as a physical frame payload, in this embodiment, a physical frame is not added with a physical frame header, the physical frame is divided into 4 pieces of sub-physical frames, the sub-physical frames are respectively transmitted on channels 1, 2, 3 and 4, and the physical frame header is added before each sub-physical frame. The receiving side detects physical frame heads on channels 1, 2, 3 and 4 respectively, if the physical frame heads are detected, sub-physical frames with the same size are taken out, according to the sending rule, the sub-physical frame taken out from channel 1 is placed at the forefront, the sub-physical frame taken out from channel 2 is placed at the second position, the sub-physical frame taken out from channel 3 is placed at the third position, the sub-physical frame taken out from channel 4 is placed at the last to form a finished physical frame, and the physical frame payload, the super-frame payload and the XGEM payload are analyzed until data are analyzed.

As shown in fig. 8, taking IEEE (Institute of Electrical and Electronics Engineers) encapsulation and data transmission and reception as an example, each piece of data is encapsulated into a MAC (Media Access Control) frame, each piece of data is encapsulated as a MAC payload, each piece of data is encapsulated into a physical frame as a physical frame payload after FEC (forward error correction) and other related processing is performed on each MAC frame, in this embodiment, a physical frame header is not added to the physical frame, the physical frame is divided into 4 sub-physical frames, the sub-physical frames are transmitted on channels 1, 2, 3 and 4, and a physical frame header is added to each sub-physical frame. The receiving party respectively detects the physical frame headers on the channels 1, 2, 3 and 4, the physical frame headers are detected, the sub-physical frames with the same size are taken out when the physical frame headers are detected, the sub-physical frame taken out from the channel 1 is placed at the forefront, the sub-physical frame taken out from the channel 2 is placed at the second position, the sub-physical frame taken out from the channel 3 is placed at the third position, the sub-physical frame taken out from the channel 4 is placed at the last, the finished physical frame is formed, and the payload and the MAC payload of the physical frame are analyzed until the data are analyzed.

The following describes a case where the channel includes a logical channel, with reference to the third embodiment and the fourth embodiment: the data/management frames may be evenly distributed into multiple fixed XGEM ports or like logical lanes, forming logical lane encapsulation frames, respectively, each independently entering a respective physical frame for transmit and receive processing.

EXAMPLE III

In this embodiment, taking an example that 2 channels are supported between the OLT and the ONU, data is divided into 2 pieces of sub-data in average, and a flag of each piece of sub-data is added to indicate a relationship between each piece of sub-data and data, and the sub-data is encapsulated and transmitted through 2 logical channels, respectively, and a receiving end (corresponding to the receiving end) reassembles encapsulated frames of 2 channels according to the flag after solving payloads.

As shown in fig. 9, taking ITU-T encapsulation and data transmission and reception as an example, each copy of data is divided equally into 2 sub-data according to the number of logical lanes XGEM Port, and transmitted in two logical lanes XGEM Port, each encapsulated into XGEM frames, each sub-data encapsulated as XGEM payload, each XGEM frame encapsulated as super-frame payload into super-frame, the super-frame is encapsulated as physical frame payload into physical frames after being subjected to relevant processing such as FEC, and transmitted on lanes 1 and 2, respectively. The receiving party respectively takes out the physical frames from the channels 1 and 2, checks the physical frame head according to the sending rule, and sequentially analyzes the physical frame payload, the super frame payload and the XGEM payload until the data is analyzed, when the XGEM frame and the payload thereof are analyzed, the marks of the XGEM frame are checked, and the related subdata is recombined into complete data.

As shown in fig. 10, taking IEEE encapsulation and data transceiving as an example, each piece of data is divided into 2 pieces of sub-data on average according to the number of logical channel LLIDs, and is transmitted in two logical channel LLIDs, each sub-data is encapsulated into a MAC frame, each sub-data is encapsulated as a MAC payload, each MAC frame is encapsulated into a super frame as a super frame payload, the super frame is encapsulated into a physical frame as a physical frame payload after being subjected to relevant processing such as FEC, and is transmitted on channels 1 and 2, respectively. The receiver takes out the physical frame from the channels 1 and 2, checks the physical frame head according to the sending rule, and analyzes the physical frame payload and the MAC payload in sequence until the data is analyzed, when the XGEM frame and the payload are analyzed, checks the mark, and recombines the related subdata to form complete data.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

In this embodiment, a data transmission device is further provided, and the data transmission device is used to implement the foregoing embodiments and preferred embodiments, which have already been described and are not described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 11 is a block diagram of a data transmission apparatus according to an embodiment of the present invention, which may be applied to a first network node, and as shown in fig. 11, the apparatus includes a sending module 112 and/or a receiving module 114, which is described below.

A sending module 112, configured to send first data to be sent to a second network node to the second network node through two or more channels uniformly;

a receiving module 114, configured to receive second data from a second network node through more than two channels, where the second data is uniformly transmitted in the more than two channels; the first network node is an optical fiber line terminal OLT, and the second network node is an optical fiber network unit ONU; or, the first network node is an optical network unit ONU, and the second network node is an optical line terminal OLT.

In an alternative embodiment, the sending module 112 may send the first data to be sent to the second network node uniformly through two or more channels by using the following manner: and uniformly sending the first data to be sent to the second network node through more than two fixed channels. In another alternative embodiment, the receiving module 114 may receive the second data from the second network node by: second data from the second network node is received over the fixed two or more lanes. In this embodiment, the channel for data transmission between the first network node and the second network node may be a fixed channel, and the fixed channel may be determined by negotiation between the two nodes, or may be configured in advance or specified by a protocol.

In an alternative embodiment, the sending module 112 may send the first data to be sent to the second network node through two or more channels uniformly by using the following manners: when the channel comprises a logic channel, uniformly dividing the first data into more than two sub-data and respectively encapsulating the sub-data into first data frames; sending the more than two encapsulated first data frames to a second network node through more than two logic channels; and/or, when the channel comprises a physical channel, encapsulating the first data into a second data frame; dividing the second data frame into more than two sub data frames; and sending more than two sub data frames to a second network node through more than two physical channels.

In an alternative embodiment, the sending module 112 may send the encapsulated two or more first data frames to the second network node through two or more logical channels as follows: distributing more than two first data frames to more than two logic channels according to a predetermined mode; and transmitting the distributed more than two first data frames to a second network node through more than two logic channels; or adding first identification information in more than two first data frames, wherein the first identification information is used for identifying the position of the subdata carried in the first data frames in the first data; distributing more than two first data frames added with the first identification information into more than two logical channels; and sending the distributed more than two first data frames to the second network node through the more than two logic channels.

In an optional embodiment, the sending module 112 may send more than two sub data frames to the second network node through more than two physical channels by using the following manners: distributing more than two sub data frames into more than two physical channels according to a predetermined mode; and, send more than two sub data frames distributed to the second network node through the above-mentioned two physical channels; or adding second identification information in the more than two sub-data frames, wherein the second identification information is used for identifying the position of the sub-data frame in a second data frame encapsulated by the first data; more than two sub data frames added with the first identification information are distributed into more than two physical channels; and sending the distributed more than two sub data frames to a second network node through the more than two physical channels.

In an alternative embodiment, the sending module 112 may encapsulate the first data into the second data frame by using the following method: packing the first data into the payload part of the second data frame; the sending module 112 may divide the second data frame into two or more sub-data frames uniformly by the following method: the payload part of the second data frame is evenly divided into more than two sub data frame payloads; the sending module 112 may send more than two sub data frames to the second network node through more than two physical channels by using the following manners: packing the sub data frame payload into more than two physical channels; sending more than two sub data frame payloads to a second network node through the more than two physical channels, and informing the second network node of the initial position of the sub data frame payload in the physical channel through at least one of the following modes: inserting frame headers at the frame starting positions of more than two physical channels, wherein the frame headers are used for identifying the starting positions of payload of sub data frames in the physical channels; appointing the initial position of the payload of the sub data frame in the physical channel with a second network node; and appointing or informing the second network node that the starting position of the sub data frame payload in the physical channel is the same as the starting position of the sub data frame payload in the physical channel when the first network node transmits data to the second network node in advance, wherein the first network node periodically inserts frame headers at the frame starting positions of more than two physical channels, and the frame headers are used for identifying the starting positions of the sub data frame payloads in the physical channels.

In an alternative embodiment, the receiving module 114 may receive the second data from the second network node through two or more channels as follows: receiving, when the channel includes a logical channel, two or more third data frames from a second network node through two or more channels; determining the positions of the data contained in the more than two third data frames in the second data, and assembling each subdata according to the determined positions to obtain the second data; and/or, when the channel includes a physical channel, receiving more than two sub data frames from a second network node through more than two channels, wherein the sub data frames are a part of a fourth data frame encapsulated by the second data; determining the positions of the more than two sub-data frames in a fourth data frame formed by encapsulating the second data, and assembling the sub-data frames according to the determined positions to obtain the fourth data frame formed by encapsulating the second data; and acquiring second data from a fourth data frame encapsulated by the second data.

In an alternative embodiment, the receiving module 114 may determine the positions of the sub data contained in the two or more third data frames in the second data by using the following manners: determining the positions of the subdata contained in more than two third data frames in the second data according to a predetermined mode; or, acquiring third identification information carried in the two or more third data frames; and determining the positions of the sub-data contained in the more than two third data frames in the second data according to the third identification information.

In an optional embodiment, the receiving module 114 may determine the positions of more than two sub data frames in the fourth data frame encapsulated by the second data by using the following manners: determining the positions of more than two sub-data frames in a fourth data frame formed by encapsulating the second data according to a predetermined mode; or, acquiring fourth identification information carried in the above two or more sub-data frames; and determining the positions of more than two sub data frames in a fourth data frame formed by encapsulating the second data according to the fourth identification information.

In an alternative embodiment, the receiving module 114 may receive more than two sub data frames from the second network node through the more than two channels as follows: determining the starting positions of the sub data frame payloads in the more than two channels by at least one of the following methods: according to the frame head mode inserted in the frame start positions of the above-mentioned two or more channels for determining the start position of payload of sub data frame in the two or more channels; the starting position of the sub data frame payload in the physical channel is appointed with the second network node; the method comprises the steps that a starting position of a sub data frame payload in a physical channel is appointed with a second network node or informed by the second network node to be the same as the starting position of the sub data frame payload in the physical channel when the second network node transmits data to a first network node in the past, wherein frame headers are periodically inserted into the second network node at the starting positions of more than two frames of the physical channel, and the frame headers are used for marking the starting position of the sub data frame payload in the physical channel; and determining more than two sub data frame payloads from the second network node from the more than two channels according to the determined starting positions of the sub data frame payloads in the more than two channels.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.

The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:

s1, the first network node uniformly sends the first data to be sent to the second network node through more than two channels; and/or the presence of a gas in the atmosphere,

s2, the first network node receives second data from the second network node through two or more channels, wherein the second data is uniformly transmitted in the two or more channels; the first network node is an optical fiber line terminal OLT, and the second network node is an optical fiber network unit ONU; or, the first network node is an optical network unit ONU, and the second network node is an optical line terminal OLT.

Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing program codes, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.

Optionally, in this embodiment, the processor executes the above steps according to program codes stored in the storage medium.

Optionally, for a specific example in this embodiment, reference may be made to the examples described in the above embodiment and optional implementation, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized in a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a memory device and executed by a computing device, and in some cases, the steps shown or described may be executed out of order, or separately as individual integrated circuit modules, or multiple modules or steps thereof may be implemented as a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method of data transmission, comprising:

the method comprises the steps that a first network node uniformly sends first data to be sent to a second network node to the second network node through more than two channels; and/or the presence of a gas in the gas,

a first network node receives second data from a second network node through more than two channels, wherein the second data are uniformly transmitted in the more than two channels;

the first network node is an optical fiber line terminal OLT, and the second network node is an optical fiber network unit ONU; or, the first network node is an optical network unit ONU, and the second network node is an optical line terminal OLT;

the first network node uniformly transmits the first data to be transmitted to the second network node through more than two channels, including: when the channel comprises a logic channel, the first network node uniformly divides the first data into more than two sub-data and respectively encapsulates the sub-data into first data frames; the first network node sends the more than two encapsulated first data frames to the second network node through the more than two logic channels; and/or, when the channel comprises a physical channel, the first network node encapsulates the first data into a second data frame; the first network node uniformly divides the second data frame into more than two sub-data frames; and the first network node sends the more than two sub data frames to the second network node through the more than two physical channels.

2. The method of claim 1,

the first network node uniformly transmits the first data to be transmitted to the second network node through more than two channels comprises: the first network node uniformly sends the first data to be sent to the second network node through more than two fixed channels; and/or the presence of a gas in the gas,

the first network node receiving the second data from the second network node over two or more channels comprises: the first network node receives the second data from the second network node over two or more fixed channels.

3. The method of claim 1, wherein the first network node sending the encapsulated two or more first data frames to the second network node via the two or more logical channels comprises:

the first network node distributes more than two first data frames to more than two logic channels according to a pre-agreed mode; and transmitting the allocated two or more first data frames to the second network node through the two or more logical channels; alternatively, the first and second electrodes may be,

the first network node adds first identification information in the more than two first data frames, wherein the first identification information is used for identifying the position of the subdata carried in the first data frame in the first data; allocating the two or more first data frames to which the first identification information is added to the two or more logical channels; and transmitting the distributed more than two first data frames to the second network node through the more than two logic channels.

4. The method of claim 1, wherein the first network node sending the two or more sub data frames to the second network node via the two or more physical channels comprises:

the first network node distributes the more than two sub data frames to the more than two physical channels according to a predetermined mode; and sending the distributed more than two sub data frames to the second network node through the more than two physical channels; alternatively, the first and second liquid crystal display panels may be,

the first network node adds second identification information to the more than two sub data frames, wherein the second identification information is used for identifying the position of the sub data frames in a second data frame encapsulated by the first data; distributing the more than two sub data frames added with the first identification information to the more than two physical channels; and sending the distributed more than two sub data frames to the second network node through the more than two physical channels.

5. The method according to claim 1 or 4,

the first network node encapsulating the first data into the second data frame comprises: the first network node encapsulating the first data into a payload portion of the second data frame;

the first network node uniformly dividing the second data frame into two or more sub-data frames includes: the first network node uniformly divides the payload part of the second data frame into more than two sub data frame payloads;

the sending, by the first network node, the two or more sub data frames to the second network node through the two or more physical channels includes: the first network node encapsulates the more than two sub data frame payloads into the more than two physical channels; the first network node sends the more than two sub data frame payloads to the second network node through the more than two physical channels, and informs the second network node of the start position of the sub data frame payload in the physical channel through at least one of the following modes:

inserting frame headers into the frame starting positions of the more than two physical channels by the first network node, wherein the frame headers are used for identifying the starting positions of the payload of the sub data frames in the physical channels;

the first network node and the second network node appoint the initial position of the sub data frame payload in the physical channel;

the first network node and the second network node agree or inform the second network node that the starting position of the sub data frame payload in the physical channel is the same as the starting position of the sub data frame payload in the physical channel when the first network node transmits data to the second network node in the past, wherein the first network node periodically inserts frame headers at the starting positions of the frames of more than two physical channels, and the frame headers are used for marking the starting position of the sub data frame payload in the physical channel.

6. The method of claim 1 or 2, wherein the first network node receiving the second data from the second network node over the two or more channels comprises:

when the channel comprises a logical channel, the first network node receives more than two third data frames from the second network node through the more than two channels; the first network node determines the positions of the subdata contained in the more than two third data frames in the second data, and assembles the subdata according to the determined positions to obtain the second data; and/or the presence of a gas in the gas,

when the channel comprises a physical channel, the first network node receives more than two sub data frames from the second network node through the more than two channels, wherein the sub data frames are part of a fourth data frame formed by encapsulating the second data; the first network node determines the positions of the more than two sub data frames in a fourth data frame formed by encapsulating the second data, and assembles the sub data frames according to the determined positions to obtain the fourth data frame formed by encapsulating the second data; and the first network node acquires the second data from a fourth data frame encapsulated by the second data.

7. The method of claim 6, wherein the first network node determining the location of the sub-data contained in the two or more third data frames in the second data comprises:

the first network node determines the positions of subdata contained in the more than two third data frames in the second data according to a pre-agreed mode; alternatively, the first and second electrodes may be,

the first network node acquires third identification information carried in the more than two third data frames; and the first network node determines the positions of the subdata contained in the more than two third data frames in the second data according to the third identification information.

8. The method of claim 6, wherein the first network node determining the positions of the two or more sub-data frames in a fourth data frame into which the second data is encapsulated comprises:

the first network node determines the positions of the more than two sub-data frames in a fourth data frame formed by encapsulating the second data according to a predetermined mode; alternatively, the first and second electrodes may be,

the first network node acquires fourth identification information carried in the more than two sub data frames; and the first network node determines the positions of the more than two sub-data frames in a fourth data frame formed by encapsulating the second data according to the fourth identification information.

9. The method of claim 6, wherein the first network node receiving more than two sub-data frames from the second network node over the more than two channels comprises:

the first network node determines the starting positions of the sub data frame payloads in the more than two channels by at least one of the following methods: according to the frame header mode inserted into the frame start positions of the more than two channels and used for determining the start positions of the payload of the sub data frames in the more than two channels; the starting position of the sub data frame payload in the physical channel is appointed with the second network node; the starting position of the sub data frame payload in the physical channel is agreed with the second network node or is informed by the second network node that the starting position of the sub data frame payload in the physical channel is the same as the starting position of the sub data frame payload in the physical channel when the second network node transmits data to the first network node in the past, wherein the second network node periodically inserts frame headers at the frame starting positions of more than two physical channels, wherein the frame headers are used for identifying the starting position of the sub data frame payload in the physical channel;

and determining more than two sub data frame payloads from the second network node from the more than two channels according to the determined initial positions of the sub data frame payloads in the more than two channels.

10. The method of claim 8, wherein the first network node receiving more than two sub-data frames from the second network node over the more than two channels comprises:

and determining more than two sub data frame payloads from the second network node from the more than two channels according to the determined starting positions of the sub data frame payloads in the more than two channels.

11. A data transmission apparatus, applied in a first network node, comprising:

the system comprises a sending module, a receiving module and a sending module, wherein the sending module is used for uniformly sending first data to be sent to a second network node to the second network node through more than two channels; and/or the presence of a gas in the gas,

a receiving module, configured to receive second data from a second network node through two or more channels, where the second data is uniformly sent in the two or more channels;

the sending module sends the first data to be sent to the second network node through more than two channels uniformly in the following way: when the channel comprises a logic channel, the first network node uniformly divides the first data into more than two sub-data and respectively encapsulates the sub-data into first data frames; the first network node sends the more than two encapsulated first data frames to the second network node through the more than two logic channels; and/or, when the channel comprises a physical channel, the first network node encapsulates the first data into a second data frame; the first network node uniformly divides the second data frame into more than two sub-data frames; and the first network node sends the more than two sub data frames to the second network node through the more than two physical channels.