CN118041492B - Data transmission method, device, equipment and storage medium - Google Patents

Abstract

The present disclosure provides a data transmission method, device, equipment and storage medium, which relate to the field of data processing technology and are used to solve the problem of low utilization efficiency of bandwidth resources in a PON system, including: a data sending end aggregates multiple first data frames to be transmitted to obtain a second data frame; the second data frame includes a second payload part, and the second payload part includes the first payload part of each first data frame in the multiple first data frames; the data sending end transmits the second data frame.

Description

Data transmission method, device, equipment and storage medium

Technical Field

The present disclosure relates to the field of data processing technology, and in particular to a data transmission method, device, equipment and storage medium.

Background Art

With the continuous development of optical network technology, fiber to the home (FTTH) has been fully rolled out, and the corresponding central office products Optical Line Terminal (OLT) and terminal products Optical Network Unit (ONU) have also been widely used. In the Passive Optical Network (PON) system, the architecture of the PON system generally includes OLT, ONU and Optical Distribution Network (ODN) to achieve data transmission.

At present, in the PON system, since bandwidth resources are pre-configured fixed resources, when transmitting data, it is necessary to fully utilize the existing bandwidth resources to transmit more data. Therefore, in order to avoid the waste of bandwidth resources, it is necessary to further improve the efficiency of bandwidth resource utilization in the PON system.

Summary of the invention

The embodiments of the present disclosure provide a data transmission method, apparatus, device and storage medium, which are used to solve the problem of low bandwidth resource utilization efficiency in a PON system.

On the one hand, a data transmission method is provided, which is applied to a data sending end, and the method includes: the data sending end aggregates multiple first data frames to be transmitted to obtain a second data frame; the second data frame includes a second payload part, and the second payload part includes the first payload part in each of the multiple first data frames.

The data sending end transmits the second data frame.

On the other hand, a data transmission method is provided, which is applied to a data receiving end, and the method includes: the data receiving end receives a second data frame, the second data frame includes a second payload part, and the second payload part includes a first payload part in each first data frame in multiple first data frames.

The data receiving end obtains a plurality of first data frames based on the second data frame.

On the other hand, a data transmission device is provided, which is applied to a data sending end. The device includes: a first processing module and a first transmission module.

The first processing module is used to aggregate multiple first data frames to be transmitted to obtain a second data frame; the second data frame includes a second payload part, and the second payload part includes the first payload part in each first data frame in the multiple first data frames.

The first transmission module is used to transmit the second data frame.

On the other hand, a data transmission device is provided, which is applied to a data receiving end. The device includes: a second transmission module and a second processing module.

The second transmission module is used to receive a second data frame, where the second data frame includes a second payload portion, and the second payload portion includes a first payload portion in each of the plurality of first data frames.

The second processing module is used to obtain multiple first data frames based on the second data frame.

On the other hand, an electronic device is provided, comprising: a memory and a processor; the memory and the processor are coupled; the memory is used to store instructions executable by the processor; and the processor executes the data transmission method of any of the above embodiments when executing the instructions.

On the other hand, a computer-readable storage medium is provided, on which computer instructions are stored. When the computer instructions are executed on a computer, the computer executes the data transmission method of any of the above embodiments.

On the other hand, a computer program product is provided. When the computer program product is run on a computer, the computer is enabled to execute the data transmission method of any one of the above embodiments.

In the embodiment of the present disclosure, by aggregating multiple first data frames to obtain a second data frame, the second payload portion included in the second data frame can include the first payload portion in each of the multiple first data frames. In this way, the effect of transmitting the first payload portion in each first data frame can be achieved by transmitting the second data frame, and aggregating multiple first data frames to obtain the second data frame can reduce the bandwidth occupied during data transmission, thereby improving the efficiency of using bandwidth resources.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the present disclosure, the drawings required for use in some embodiments of the present disclosure will be briefly introduced below. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and a person skilled in the art can also obtain other drawings based on these drawings.

FIG1 is a schematic diagram of a communication system provided by some embodiments of the present disclosure;

FIG2 is a schematic flow chart of a data transmission method provided by some embodiments of the present disclosure;

FIG3 is a schematic diagram of an example of a frame structure of a data frame provided in some embodiments of the present disclosure;

FIG4 is a schematic diagram of another frame structure example of a data frame provided in some embodiments of the present disclosure;

FIG5 is a schematic flow chart of another data transmission method provided by some embodiments of the present disclosure;

FIG6 is a flow chart of another data transmission method provided by some embodiments of the present disclosure;

FIG7 is a schematic flow chart of another data transmission method provided by some embodiments of the present disclosure;

FIG8 is a schematic diagram of another frame structure example of a data frame provided in some embodiments of the present disclosure;

FIG9 is a schematic diagram of an example of data frame aggregation processing provided by some embodiments of the present disclosure;

FIG10 is a schematic diagram of another frame structure example of a data frame provided in some embodiments of the present disclosure;

FIG11 is a schematic diagram of another frame structure example of a data frame provided in some embodiments of the present disclosure;

FIG12 is a schematic diagram of another example of data frame aggregation processing provided by some embodiments of the present disclosure;

FIG13 is a schematic diagram of another frame structure example of a data frame provided in some embodiments of the present disclosure;

FIG14 is a flow chart of another data transmission method provided by some embodiments of the present disclosure;

FIG15 is a schematic diagram of another example of data frame aggregation processing provided by some embodiments of the present disclosure;

FIG16 is a schematic diagram of another example of data frame aggregation processing provided by some embodiments of the present disclosure;

FIG17 is a flow chart of another data transmission method provided by some embodiments of the present disclosure;

FIG18 is a schematic structural diagram of a first data transmission device provided in some embodiments of the present disclosure;

FIG19 is a schematic diagram of the structure of a second data transmission device provided in some embodiments of the present disclosure;

FIG20 is a schematic diagram of the structure of a data transmission device provided in some embodiments of the present disclosure.

DETAILED DESCRIPTION

The following will be combined with the drawings in the present disclosure to clearly and completely describe the technical solutions in the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

It should be noted that, in the present disclosure, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present disclosure should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

In the description of the present disclosure, unless otherwise specified, "/" means "or", for example, A/B can mean A or B. "And/or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, "at least one" means one or more, and "plurality" means two or more.

Before introducing the data transmission method provided by the embodiment of the present disclosure in detail, the implementation environment and application scenarios of the embodiment of the present disclosure are first introduced.

First, the application scenarios of the embodiments of the present disclosure are introduced.

In the PON system, passive optical network equipment can be subdivided into Gigabit-capable Passive Optical Network (GPON), 10G Passive Optical Networks (XGPON), 10G Symmetric Passive Optical Networks (XGSPON), and High Speed Passive Optical Networks (HSPON) according to the different protocols of the transmission convergence layer (TC). In the PON system, data transmission between OLT and ONU is achieved by pre-configuring bandwidth resources. However, the configured bandwidth resources are fixed resources. When transmitting data, it is necessary to make full use of the existing bandwidth resources to transmit more data. Therefore, it is necessary to further consider how to improve the efficiency of bandwidth resource utilization in the PON system to transmit more data at the same time.

In order to solve the above problems, an embodiment of the present disclosure provides a data transmission method. The data transmission method provided by the embodiment of the present disclosure is applied to a PON system.

The present disclosure aggregates multiple first data frames to obtain a second data frame, so that the second payload portion included in the second data frame includes the first payload portion in each of the multiple first data frames. In this way, the effect of transmitting the first payload portion in each first data frame can be achieved by transmitting the second data frame, and the aggregation of multiple first data frames to obtain the second data frame can reduce the bandwidth occupied during data transmission, thereby improving the efficiency of using bandwidth resources.

That is to say, by aggregating multiple first data frames to obtain a second data frame, when transmitting the second data frame, the amount of bandwidth resources occupied can be reduced compared to transmitting multiple first data frames, that is, the amount of bandwidth resources occupied by the second data frame is less than the amount of bandwidth resources occupied by multiple first data frames. Such an aggregation method can aggregate more data frames, thereby transmitting more data at the same time and improving the efficiency of bandwidth resource utilization.

The implementation environment of the embodiments of the present disclosure is introduced below.

As shown in Fig. 1, it is a schematic diagram of a communication system provided by an embodiment of the present disclosure, and the communication system may include: a data transmitting end 101 and a data receiving end 102. The data transmitting end 101 and the data receiving end 102 perform wired or wireless communication.

The data transmitting end 101 may aggregate multiple first data frames to be transmitted to obtain a second data frame, and transmit the second data frame to the data receiving end 102 .

In some embodiments, the data transmitting end 101 may first encapsulate each of the multiple first data frames to obtain multiple third data frames, and then aggregate the obtained multiple third data frames to obtain a second data frame, and transmit the second data frame to the data receiving end 102.

Alternatively, the data transmitting end 101 may obtain multiple first payload parts based on multiple first data frames, and then perform splicing processing on the multiple first payload parts to obtain a second data frame, and transmit the second data frame to the data receiving end 102.

In some embodiments, the data transmitting end 101 may further compress the second payload portion in the second data frame to obtain a compressed second data frame, and then transmit the compressed second data frame to the data receiving end 102 .

Specifically, the data transmitting end 101 compresses the data units that meet the compression condition in the second payload part of the second data frame to obtain the compressed data units. Then, based on the compressed data units and the data units that do not meet the compression condition in the second payload part, a compressed second data frame is obtained. The compressed second data frame is transmitted to the data receiving end 102.

Correspondingly, the data receiving end 102 can receive the second data frame transmitted by the data transmitting end 101, and obtain multiple first data frames based on the second data frame.

It should be noted that the data transmitting end 101 in the embodiment of the present disclosure may be an OLT, and the data receiving end 102 may be an ONU; or the data transmitting end 101 may be an ONU, and the data receiving end 102 may be an OLT. Or it may be other terminals for transmitting data in a PON system, which is not specifically limited in this application.

After introducing the application scenario and implementation environment of the embodiment of the present disclosure, the data transmission method provided by the embodiment of the present disclosure is described in detail below in combination with the above implementation environment.

The embodiment of the present disclosure provides a data transmission method, which is applied to a data sending end. As shown in FIG. 2 , the data transmission method may include: S201 - S202 .

S201. A data transmitting end aggregates a plurality of first data frames to be transmitted to obtain a second data frame.

The second data frame includes a second payload portion, and the second payload portion includes a first payload portion in each of the plurality of first data frames.

It can be understood that the multiple first data frames to be transmitted are data that a data transmitter (eg, ONU) needs to send to a data receiver (eg, OLT), and the first data frame may include a first payload portion and multiple other fields.

In the embodiments of the present disclosure, the data transmitter and the data receiver are terminals for transmitting data in the PON system. Specifically, the PON system can be subdivided into GPON system, XGPON system, XGSPON system, etc. according to different protocols of the TC layer. The embodiments of the present disclosure are illustrative with the GPON system, XGPON system, and XGSPON system as examples, but the method provided by the present disclosure is not limited to the system described in the embodiments, and can also be other systems, which are not specifically limited by the present disclosure.

It should be noted that the GPON system uses the GPON encapsulation method, that is, the Gigabit Passive Optical Network Equipment Encapsulation Method (GPON Encapsulation Method, GEM frame). The GEM frame is a method of encapsulating data on the GPON system. It is the smallest service bearing unit in GPON technology and the data structure in which all services are encapsulated. Similarly, the XGPON system, that is, the 10G Passive Optical Network Equipment Encapsulation Method (XGPON Encapsulation Method, XGEM frame) and the XGSPON system use the XGEM frame.

In the disclosed embodiment, the first data frame is an Ethernet data packet, and the first payload portion of the first data frame includes at least one of the following: destination address, source address, type, length, data body, and frame check sequence.

Exemplarily, Figure 3 is a schematic diagram of an example frame structure of a first data frame provided by an exemplary embodiment of the present application. As shown in Figure 3, the first data frame includes multiple other fields such as: Inter packet gap, preamble, Start Frame Delimiter (SFD) and End of Frame (EOF); the first payload part of the first data frame includes: Destination Address (DA), Source Address (SA), Type/Length (Length/Type), Data Body (MAC Client Data), Frame Check Sequence (FCS).

In the embodiment of the present disclosure, the second payload part also includes multiple first fields, each first field corresponds to a first payload part, and the first field is used to indicate the byte length of the corresponding first payload part.

Optionally, the second data frame may be a GEM frame, and the first field may be a payload length indication (OPLI) before encapsulation. The byte length of the OPLI may be X bits. Specifically, X may be a reasonable value, such as 12 bits or 14 bits. For example, 14 bits may indicate that the byte length of the corresponding first payload part is 16383 bytes.

In the embodiment of the present disclosure, the second data frame further includes a frame header, the frame header of the second data frame includes a second field, and the second field is used to indicate that the second payload part is aggregated from multiple first payload parts.

Optionally, when the second data frame is a GEM frame, the second field is a PTI field in the GEM frame.

Exemplarily, FIG4 is a schematic diagram of an example frame structure of a second data frame provided by an exemplary embodiment of the present application. As shown in FIG4, the second data frame includes: a frame header and a second payload portion. Among them, the second payload portion includes multiple groups of fields, each group of fields includes a first field and a first payload portion. For example, the second payload portion includes 2 groups of fields, each group of fields includes a first field and a first payload portion. It can be understood that the second data frame is obtained by aggregating the number of first data frames, and the second payload portion includes the same number of groups of fields.

Optionally, when the second data frame is a GEM frame, the frame header of the second data frame may include fields such as payload length indication (Payload Length Indicator, PLI), port identifier (Port-ID), payload type indicator (Payload Type Indicator, PTI) and cyclic redundancy check (Cyclic Redundancy Check, CRC).

It should be noted that the payload type indicator PTI indicates different data types through different field codes, as shown in Table 1, which shows the data types indicated when the field codes (codes) of the payload type indicator PTI are different. Among them, the payload type indicator codes (PTI code) include: 000, 001, 010, 011, 100, 101, 110, 111, and the meaning of each payload type indicator code is: 000 is defined as "user data fragment, not the end of a frame"; 001 is defined as "user data fragment, end of a frame"; 100 is defined as "GEM OAM, not the end of a frame"; 101 is defined as "GEMOAM, end of a frame"; 111 is defined as "aggregate data frame obtained by re-encapsulation"; 010, 011 and 110 are not defined and are reserved. Among them, operations, administration and maintenance (OAM).

Table 1

It should be noted that, when the PTI is 3 bits, the PTI field code has 8 values. When the PTI field code has different values, the information used for indication is different. For example, when the PTI field code is 000, it is used to indicate "User data fragment, not the end of a frame", when the PTI field code is 001, it is used to indicate "User data fragment, end of a frame", when the PTI field code is 100, it is used to indicate "GEM OAM, not the end of a frame", and when the PTI field code is 101, it is used to indicate "GEM OAM, end of a frame". Among them, the values of the PTI field code (code) 010, 011, 110 and 111 are codes that have not yet been defined. Therefore, the embodiment of the present disclosure can indicate that the second payload part of the second data frame is aggregated from multiple first payload parts (that is, the second data frame is an aggregated data frame obtained by encapsulating again) by defining the value of the PTI field code (code) (for example, the value is 111).

Optionally, the second data frame may also be an XGEM frame, and the first field is XOPLI. The byte length of XOPLI may be Y bits, and specifically, Y may be a reasonable value, such as 12 bits or 14 bits. For example, 14 bits may indicate that the byte length of the corresponding first payload part is 16383 bytes.

Optionally, when the second data frame is an XGEM frame, the second field is an option (OPTIONs field) in the XGEM frame.

Optionally, when the second data frame is an XGEM frame, the frame header of the second data frame may include fields such as payload length indication (PLI), key index (Key index, KI), XGEM port identifier (Port-ID), options (Options), last indication (LF) and header error check (Header Error Check, HEC).

S202: The data sending end transmits a second data frame.

In the embodiment of the present disclosure, as shown in FIG. 5 , the data transmission method may specifically include: S501 - S503 , and the above S202 may specifically be implemented through S502 and S503 .

S501. A data transmitting end aggregates a plurality of first data frames to be transmitted to obtain a second data frame.

Specifically, the description of S501 may refer to the above S201, which will not be repeated here.

S502: The data transmitting end compresses the second payload part in the second data frame to obtain a compressed second data frame.

S503: The data sending end transmits the compressed second data frame.

It can be understood that after the data sending end obtains the aggregated second data frame, the second payload part in the second data frame can be further compressed to further reduce the bandwidth occupied by the second data frame and improve the efficiency of bandwidth resource utilization.

In the embodiment of the present disclosure, the second payload part includes multiple data units, each data unit includes k bits, and k is an integer greater than 1. As shown in Fig. 6, the data transmission method may specifically include: S601-S604, and the above S502 may specifically be implemented through S602 and S603.

S601. A data transmitting end aggregates a plurality of first data frames to be transmitted to obtain a second data frame.

Specifically, the description of S601 may refer to the above S201, which will not be repeated here.

S602: The data transmitting end compresses the data units that meet the compression condition in the second payload part of the second data frame to obtain compressed data units.

S603: The data transmitting end obtains a compressed second data frame based on the compressed data unit and the data unit in the second payload part that does not meet the compression condition.

Among them, the compression conditions include: the value of the first m bits in the data unit is a first value, and the value of the last n bits is a second value, m is greater than a preset value, and the sum of m and n is equal to k; the compressed data unit includes q bits, the value of the first bit among the q bits is the first value, and the last q-1 bits are used to indicate the value of m.

S604: The data sending end transmits the compressed second data frame.

Exemplarily, whether the second data frame is a GEM frame or an XGEM frame, messages can be compressed for both the GEM payload in the GEM frame and the XGEM payload in the XGEM frame, which can further reduce bandwidth occupancy and improve bandwidth utilization.

As shown in Table 2, for bytes that meet the compression conditions (for example, the first m bits are 1 and the last n bits are 0), for example, 8 bits in a byte are compressed to obtain a 5-bit compressed byte. The first bit of the 5 bits represents 1, and the following bits represent the number of 1s, and so on. The same method is used for the compression method where the first m bits are 0 and the last n bits are 1, so that 1 byte can reduce 3 bits.

Table 2

It can be understood that when 1000 0000 is compressed, the resulting 1 0001 can be indicated by the first bit 1 in 1 0001, indicating that the first bit of the byte before compression is 1, and the last four bits 0001 in 1 0001 can indicate that the first bit of the byte before compression is 1, and the last 7 bits are 0; when 1100 0000 is compressed, the resulting 1 0010 can be indicated by the first bit 1 in 1 0010, indicating that the first bit of the byte before compression is 1, and the last four bits 0010 in 1 0010 can indicate that the first 2 bits of the byte before compression are 1, and the last 6 bits are 0. Similarly, the understanding of 1110 0000 and 1 0011, 1111 0000 and 1 0100, 1111 1000 and 1 0101, 1111 1100 and 10110, 1111 1110 and 1 1110, 1111 1111 and 1 1000 is the same and will not be repeated here.

In an embodiment of the present disclosure, a method for compressing data units is provided, by further compressing data units in a second payload part of a second data frame that meet compression conditions to obtain a compressed second data frame, thereby further reducing the number of bits in the compressed second data frame, further reducing the amount of bandwidth occupied during data transmission, and thus improving the efficiency of bandwidth resource utilization.

In the embodiment of the present disclosure, by aggregating multiple first data frames to obtain a second data frame, the second payload portion included in the second data frame can include the first payload portion in each of the multiple first data frames. In this way, the effect of transmitting the first payload portion in each first data frame can be achieved by transmitting the second data frame, and aggregating multiple first data frames to obtain the second data frame can reduce the bandwidth occupied during data transmission, thereby improving the efficiency of using bandwidth resources.

In a first possible implementation manner, as shown in FIG. 7 , the data transmission method may specifically include: S701 - S703 , and the above S201 may specifically be implemented through S701 and S702 .

S701. A data transmitting end encapsulates each first data frame among a plurality of first data frames to obtain a plurality of third data frames.

The third data frame obtained by encapsulating the first data frame includes the first payload part in the first data frame.

S702: The data transmitting end aggregates multiple third data frames to obtain a second data frame.

S703: The data sending end transmits a second data frame.

It should be noted that the payload part (i.e., from the destination address DA to the frame check sequence FCS) in each small-byte Ethernet data packet is encapsulated to obtain a GEM frame (or XGEM frame). In the encapsulation process, a large number of small-byte Ethernet data packets are encapsulated into a large number of GEM frames. Since each GEM frame includes a frame header, there will be a large number of frame headers, so the bandwidth occupied when transmitting a large number of GEM frames is large. Therefore, for GEM frames with the same Port-ID in the GEM frame, a unified encapsulation can be performed again to reduce the bandwidth occupied by the frame header.

It can be understood that each of the above-mentioned multiple first data frames corresponds to the same port identifier (Port-ID), that is, the Port-ID configured for each of the multiple first data frames is the same. Therefore, when each first data frame is encapsulated separately, the frame header of the obtained encapsulated data frame can include the same Port-ID.

In a first possible example, when the PON system is specifically a GPON system, the second data frame is a GEM frame, and each of the multiple first data frames needs to be encapsulated to obtain multiple GEM frames (i.e., third data frames). Then, the multiple GEM frames are aggregated to obtain an aggregated GEM frame (i.e., second data frame).

Exemplarily, FIG8 is a schematic diagram of an example of a frame structure of a GEM frame provided by an exemplary embodiment of the present application. As shown in FIG8, a plurality of first data frames (such as Ethernet data packets) are aggregated to obtain a frame structure of a Gigabit passive optical network device encapsulation mode frame (GEM frame), and the GEM frame includes: a frame header (GEMheader) (5 bytes) of a Gigabit passive optical network device encapsulation mode frame and a payload portion (GEM payload) of a Gigabit passive optical network device encapsulation mode frame (i.e., the second payload portion). Among them, the GEM payload includes multiple groups of fields, each group of fields includes a pre-encapsulation payload length indication (OPLI) (Xbit) and a pre-encapsulation GEM payload (i.e., the first payload portion in a first data frame). For example, the GEM payload includes 2 groups of fields, the first group of fields includes an OPLI and a GEM payload1; the second group of fields includes an OPLI and a GEM payload2.

Specifically, Figure 9 is a schematic diagram of an example of data frame aggregation processing provided by an exemplary embodiment of the present application. As shown in Figure 9, to encapsulate the first data frame to obtain a GEM frame, it is necessary to first perform encapsulation processing on multiple first data frames respectively, encapsulate the destination address (DA), source address (SA), type/length (Length/Type), data body (MAC Client Data), and frame check sequence (FCS) in a first data frame, and obtain a GEM payload of a GEM frame corresponding to a first data frame (which can be called the third payload part of the third data frame), and generate a corresponding frame header, and obtain a GEM frame corresponding to the first data frame, and the GEM frame also includes: payload length indication (PLI), port identifier (Port-ID), payload type indicator (PTI) and cyclic redundancy check code (CRC).

Then, the GEM frames corresponding to each first data frame are aggregated to aggregate the GEM payloads in the GEM frames corresponding to each first data frame, thereby obtaining an aggregated GEM frame (ie, the second data frame).

Exemplarily, FIG10 is a schematic diagram of a frame structure example of a data frame provided by an exemplary embodiment of the present application. As shown in FIG10, a frame header structure of a GEM frame, the frame header of the GEM frame includes: a payload length indication (PLI), a port identifier (Port-ID), a payload type indicator (PTI) and a header error check (HEC). Among them, the payload length indication PLI is used to indicate the byte length of the GEM payload, which can be 12 bits; the port identifier (Port-ID) can be 12 bits; the payload type indicator (PTI) is used to indicate the data type of the third payload part, which can be 3 bits; the header error check (HEC) can be 13 bits.

For example, the data transmitter sends a 64-byte message (i.e., multiple first data frames), and the maximum upstream bandwidth of the GPON system is 19438 bytes, of which the length of the PLI field is 12 bits, and the maximum length of the GEM payload is 4095 bytes. Therefore, there are 19438/(64+5) (approximately equal to 282) GEM frames. If, based on the embodiment of the present application, the GEM frames with the same Port-ID can be uniformly encapsulated, then there are only 19438/(4095+5) (approximately equal to 5) GEMs, which means that 277 GEM frames are reduced, and the frame headers of 277 GEM frames are reduced, which is equivalent to reducing 277*5=1385 bytes. For unified encapsulation, if the OPLI used is 14 bits, each GEM frame will occupy 14 bits, that is, 282*14/8=494 bytes, so 1385-494=891 bytes can be reduced, thereby reducing the bandwidth occupancy and improving the bandwidth utilization when transmitting data.

Furthermore, since there are 4 undefined codes (i.e., 010, 011, 110, and 111) in the existing PTI field codes, the definition of field codes can be increased as shown in Table 3: for example, 010 represents that the field length of the payload length indication (PLI) is increased by 1 bit, i.e., the maximum length of the GEM payload is 13 bits (i.e., 8191 bytes); or, for example, 011 represents that the field length of the PLI is increased by 2 bits, i.e., the maximum length of the GEM payload is 14 bits (i.e., 16383 bytes); or, for example, 110 represents that the field length of the PLI is increased by 3 bits, i.e., the maximum length of the GEM payload is 15 bits (i.e., 32767 bytes), but the maximum upstream bandwidth of the GPON system is 19438 bytes, so 110 is used to represent that the maximum length of the GEM payload is 19438-5=19433 bytes.

For another example, a 16383-byte data packet that previously needed to be encapsulated into 5 GEM frames now only needs to be encapsulated into 1 GEM frame. The frame header of 1 GEM frame occupies 5 bytes, which saves 20 bytes of bandwidth.

For another example, when the maximum length of the GEM payload is 14 bits, for a 64-byte message, the GEM payload can be 19433 bytes. By uniformly encapsulating the GEM frames with the same Port-ID, a 64-byte message can be sent through one GEM frame. That is, the frame headers of 281 GEM frames are reduced, thus reducing the occupied 281*5=1405 bytes. The GEM payload of each GEM frame occupies 14 bits, that is, 282*14/8=494 bytes, so the occupied 1405-494=911 bytes can be reduced.

Table 3

In a second possible example, when the PON system is specifically an XGPON system or an XGSPON system, the second data frame may be an XGEM frame. First, each of the multiple first data frames needs to be encapsulated to obtain multiple XGEM frames (i.e., the third data frame). Then, the multiple XGEM frames are aggregated to obtain an aggregated XGEM frame (i.e., the second data frame).

Exemplarily, FIG11 is a schematic diagram of an example of a frame structure of a data frame provided by an exemplary embodiment of the present application. As shown in FIG11, a frame structure of an XGEM frame is a frame structure of a 10G passive optical network device encapsulation mode frame (XGEM frame) obtained by aggregating multiple first data frames (such as Ethernet data packets). The XGEM frame includes: a frame header (XGEM header) (8 bytes) of a 10G passive optical network device encapsulation mode frame and a payload portion (XGEM payload) (i.e., a second payload portion) of a 10G passive optical network device encapsulation mode frame. Among them, the XGEM payload includes multiple groups of fields, each group of fields includes a pre-encapsulation payload length indication (XOPLI) (Ybit) and an XGEM payload (i.e., a first payload portion in a first data frame). For example, the XGEM payload includes 2 groups of fields, the first group of fields includes an XOPLI and an XGEMpayload1; the second group of fields includes an XOPLI and an XGEM payload2.

Optionally, for the Options field in the XGEM header, the existing 18 bits are not used. As shown in Table 4, the Options field (Options code) can be defined (Meaning): for example, a bit position is 1, or multiple bits are combined to form a certain value, indicating that the XGEM frame is re-encapsulated.

Table 4

Specifically, Figure 12 is a schematic diagram of an example of data frame aggregation processing provided by an exemplary embodiment of the present application. As shown in Figure 12, the first data frame is encapsulated to obtain an XGEM frame. It is necessary to first perform encapsulation processing on multiple first data frames respectively, encapsulate the destination address (DA), source address (SA), type/length (Length/Type), data body (MAC Client Data), and frame check sequence (FCS) in a first data frame, and obtain an XGEM payload of an XGEM frame corresponding to a first data frame (which can be called the third payload part of the third data frame), and generate a corresponding frame header, and obtain an XGEM frame corresponding to the first data frame, and the XGEM frame also includes: payload length indication (PLI), key index (KI), port identifier (Port-ID), options (Options), last indication (LF) and header error check (HEC).

Then, the XGEM frame corresponding to each first data frame is aggregated to aggregate the XGEM payload in the XGEM frame corresponding to each first data frame, so as to obtain an aggregated XGEM frame (ie, the second data frame).

Exemplarily, FIG13 is a schematic diagram of a frame structure example of a data frame provided by an exemplary embodiment of the present application. As shown in FIG13, a frame header structure of an XGEM frame, the frame header of the XGEM frame includes: payload length indication (PLI), key index (KI), XGEM port identifier (Port-ID), options (Options), last indication (LF) and header error check (HEC). Among them, the payload length indication PLI is used to indicate the byte length of the XGEM payload, which can be 14 bits; the key index (KI) can be 2 bits; the XGEM port identifier (Port-ID) can be 16 bits; options (Options) are used to indicate the data type of the XGEM payload, which can be 18 bits; the last indication (LF) can be 1 bit; the header error check (HEC) can be 13 bits.

In an embodiment of the present disclosure, a specific implementation method is provided, which can reduce the bandwidth occupied during data transmission, thereby improving the efficiency of bandwidth resource utilization, by first encapsulating each of the multiple first data frames to obtain multiple corresponding data frames, and then aggregating the encapsulated data frames to obtain aggregated data frames.

In the embodiment of the present disclosure, as shown in FIG. 14 , the data transmission method may specifically include: S1401 - S1403 , and the above S201 may specifically be implemented through S1401 and S1402 .

S1401. A data transmitter obtains multiple first payload parts based on multiple first data frames.

S1402: The data transmitting end concatenates the multiple first payload parts to obtain a second data frame.

S1403: The data sending end transmits a second data frame.

In a first possible implementation, when the PON system is specifically a GPON system, the second data frame is a GEM frame, and Figure 15 is a schematic diagram of an example of data frame aggregation processing provided by an exemplary embodiment of the present application. As shown in Figure 15, the first data frame is aggregated to obtain a GEM frame, and multiple first payload parts can be directly obtained from multiple first data frames, and then the multiple first payload parts are connected end to end to obtain an aggregated GEM frame (i.e., the second data frame).

In a second possible implementation, when the PON system is specifically an XGPON system or an XGSPON system, the second data frame is an XGEM frame, and FIG16 is a schematic diagram of an example of data frame aggregation processing provided by an exemplary embodiment of the present application. As shown in FIG16, the first data frame is aggregated to obtain an XGEM frame, and multiple first payload parts can be directly obtained from multiple first data frames, and then the multiple first payload parts are connected end to end to obtain an aggregated XGEM frame (i.e., the second data frame).

In the embodiment of the present disclosure, another specific implementation method is provided, which can obtain the corresponding multiple first payload parts directly from the multiple first data frames, and then directly splice the multiple first payload parts to obtain an aggregated data frame. This can reduce the bandwidth occupied during data transmission, thereby improving the efficiency of bandwidth resource use.

The embodiment of the present disclosure also provides a data transmission method, which is applied to a data receiving end. As shown in FIG. 17 , the data transmission method may include: S1701 - S1702.

S1701. The data receiving end receives a second data frame.

The second data frame includes a second payload portion, and the second payload portion includes a first payload portion in each of the plurality of first data frames.

Optionally, the first data frame is an Ethernet data packet, and the first payload part of the first data frame includes at least one of the following: a destination address, a source address, a type, a length, a data body, and a frame check sequence.

Optionally, the second payload part further includes multiple first fields, each first field corresponds to a first payload part, and the first field is used to indicate the byte length of the corresponding first payload part.

Optionally, the second data frame further includes a frame header, the frame header of the second data frame includes a second field, and the second field is used to indicate that the second payload part is aggregated from multiple first payload parts.

Optionally, the second data frame may be a GEM frame, and the second field may be a PTI field in the GEM frame.

Alternatively, the second data frame may be an XGEM frame, and the second field may be an OPTIONs field in the XGEM frame.

S1702: The data receiving end obtains multiple first data frames based on the second data frame.

In the embodiment of the present disclosure, after receiving the second data frame, the data receiving end may parse the second data frame by a parsing method corresponding to the aggregation processing and the compression processing to obtain multiple first data frames.

Specifically, the data receiving end may first decompress the data units that meet the decompression conditions in the second payload part of the second data frame to obtain the decompressed second data frame, and then parse the decompressed second data frame to obtain multiple first data frames.

Alternatively, the data receiving end may first parse the second data frame to obtain multiple first data frames, and then decompress the data units that meet the decompression conditions in the payload part of each parsed first data frame to obtain the decompressed first data frame.

It should be noted that, for the specific description of this embodiment, reference may be made to the above-mentioned contents related to the data sending end, which will not be repeated here.

In the embodiment of the present disclosure, after the data receiving end receives the second data frame, the second data frame can be parsed based on the parsing method corresponding to the aggregation processing and compression processing in the data sending end, thereby obtaining corresponding multiple first data frames. In this way, the effect of transmitting the first payload part in each first data frame can be achieved by transmitting the second data frame, and the bandwidth occupied during data transmission can be reduced, thereby improving the efficiency of using bandwidth resources.

It is understandable that, in order to realize the above functions, the data transmitting end and the data receiving end include hardware structures and/or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the algorithm steps of each example described in the embodiments of the present disclosure, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present disclosure.

The disclosed embodiment can divide the data sending end and the data receiving end into functional modules according to the above method embodiment. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one functional module. The above integrated module can be implemented in the form of hardware or software. It should be noted that the division of modules in the disclosed embodiment is schematic and is only a logical function division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

FIG18 is a schematic diagram of the structure of a data transmission device provided by an embodiment of the present disclosure, which is applied to a data sending end. The first data transmission device 1800 can execute the data transmission method shown in FIG2 of the above method embodiment. As shown in FIG18 , the first data transmission device 1800 includes: a first processing module 1801 and a first transmission module 1802.

The first processing module 1801 is used to aggregate multiple first data frames to be transmitted to obtain a second data frame; the second data frame includes a second payload part, and the second payload part includes the first payload part in each first data frame in the multiple first data frames.

The first transmission module 1802 is configured to transmit a second data frame.

Optionally, the second payload part further includes multiple first fields, each first field corresponds to a first payload part, and the first field is used to indicate the byte length of the corresponding first payload part.

Optionally, the second data frame further includes a frame header, the frame header of the second data frame includes a second field, and the second field is used to indicate that the second payload part is aggregated from multiple first payload parts.

Optionally, the second data frame is a GEM frame, and the second field is a PTI field in the GEM frame; or, the second data frame is an XGEM frame, and the second field is an OPTIONs field in the XGEM frame.

Optionally, the first processing module 1801 is specifically used to encapsulate each first data frame in the multiple first data frames to obtain multiple third data frames; the third data frames obtained by encapsulating the first data frames include the first payload part in the first data frames.

The first processing module 1801 is further specifically configured to aggregate multiple third data frames to obtain a second data frame.

Optionally, the first processing module 1801 is specifically configured to obtain multiple first payload parts based on multiple first data frames.

The first processing module 1801 is further configured to perform splicing processing on the multiple first payload parts to obtain a second data frame.

Optionally, the first data frame is an Ethernet data packet, and the first payload part of the first data frame includes at least one of the following: a destination address, a source address, a type, a length, a data body, and a frame check sequence.

Optionally, the first processing module 1801 is further configured to compress the second payload portion in the second data frame to obtain a compressed second data frame.

The first transmission module 1802 is specifically configured to transmit the compressed second data frame.

Optionally, the second payload part includes multiple data units, each data unit includes k bits, k is an integer greater than 1; the first processing module 1801 is specifically used to compress the data units that meet the compression conditions in the second payload part of the second data frame to obtain compressed data units; wherein the compression conditions include: the values of the first m bits in the data unit are the first value, and the values of the last n bits are the second value, m is greater than a preset value, and the sum of m and n is equal to k; the compressed data unit includes q bits, the value of the first bit of the q bits is the first value, and the last q-1 bits are used to indicate the value of m.

The first processing module 1801 is further specifically configured to obtain a compressed second data frame based on the compressed data unit and the data unit in the second payload part that does not meet the compression condition.

FIG19 is a schematic diagram of the structure of a data transmission device provided by an embodiment of the present disclosure. When applied to a data receiving end, the second data transmission device 1900 can execute the data transmission method shown in FIG17 in the above method embodiment. As shown in FIG19 , the second data transmission device 1900 includes: a second transmission module 1901 and a second processing module 1902.

The second transmission module 1901 is used to receive a second data frame, where the second data frame includes a second payload part, and the second payload part includes a first payload part in each of the multiple first data frames.

The second processing module 1902 is configured to obtain a plurality of first data frames based on the second data frame.

Optionally, the second payload part further includes multiple first fields, each first field corresponds to a first payload part, and the first field is used to indicate the byte length of the corresponding first payload part.

Optionally, the second data frame further includes a frame header, the frame header of the second data frame includes a second field, and the second field is used to indicate that the second payload part is aggregated from multiple first payload parts.

Optionally, the second data frame is a GEM frame, and the second field is a PTI field in the GEM frame; or, the second data frame is an XGEM frame, and the second field is an OPTIONs field in the XGEM frame.

Optionally, the first data frame is an Ethernet data packet, and the first payload part of the first data frame includes at least one of the following: a destination address, a source address, a type, a length, a data body, and a frame check sequence.

In the case of implementing the functions of the above-mentioned integrated modules in the form of hardware, the embodiment of the present disclosure provides another possible network device structure of the data transmission device (specifically a data sending end or a data receiving end) involved in the above-mentioned embodiment. As shown in FIG20 , the data transmission device 2000 includes: a processor 2002 and a bus 2004. Optionally, the data transmission device 2000 may also include a memory 2001; optionally, the data transmission device 2000 may also include a communication interface 2003.

The processor 2002 may be a processor that implements or executes various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present disclosure. The processor 2002 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present disclosure. The processor 2002 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

The communication interface 2003 is used to connect with other devices via a communication network, which may be Ethernet, wireless access network, wireless local area network (WLAN), etc.

The memory 2001 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage devices, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

As a possible implementation, the memory 2001 may exist independently of the processor 2002, and the memory 2001 may be connected to the processor 2002 via a bus 2004 to store instructions or program codes. When the processor 2002 calls and executes the instructions or program codes stored in the memory 2001, the data transmission method provided in the embodiment of the present disclosure can be implemented.

In another possible implementation, the memory 2001 may also be integrated with the processor 2002 .

The bus 2004 may be an extended industry standard architecture (EISA) bus, etc. The bus 2004 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, FIG20 only uses one thick line, but does not mean that there is only one bus or one type of bus.

Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium), which stores computer program instructions. When the computer program instructions are executed on a computer, the computer executes the data transmission method described in any of the above embodiments.

Exemplarily, the above-mentioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes, etc.), optical disks (e.g., compact disks (CD), digital versatile disks (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks, or key drives, etc.). The various computer-readable storage media described in the present disclosure may represent one or more devices and/or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.

An embodiment of the present disclosure provides a computer program product including instructions. When the computer program product is run on a computer, the computer is enabled to execute the data transmission method described in any one of the above embodiments.

The above description is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure.

Claims (13)

1. A data transmission method, applied to a data transmitting end, the method comprising:

aggregating a first payload part in each first data frame in a plurality of first data frames to be transmitted to obtain a second data frame; the first data frame is an ethernet data packet, and the first payload portion of the first data frame includes at least one of: a destination address, a source address, a type, a length, a data body, a frame check sequence, the second data frame being a GEM frame or an XGEM frame, the second data frame comprising a second payload portion comprising a first payload portion in each of the plurality of first data frames, the second payload portion comprising a plurality of data units, each data unit comprising k bits, k being an integer greater than 1;

compressing the data unit meeting the compression condition in the second payload part in the second data frame to obtain a compressed data unit; the compression conditions include: the value of the first m bits in the data unit is a first value, the value of the last n bits is a second value, m is larger than a preset value, and the sum of m and n is equal to k; the compressed data unit comprises q bits, wherein the value of the first bit in the q bits is the first value, and the q-1 bits are used for indicating the value of m;

Obtaining a second data frame after the compression processing based on the data unit after the compression processing and the data unit which does not meet the compression condition in the second payload part;

and transmitting the compressed second data frame.

2. The method of claim 1, wherein the second payload portion further comprises a plurality of first fields, each first field corresponding to one of the first payload portions, the first field indicating a byte length of the corresponding first payload portion.

3. The method of claim 1, wherein the second data frame further comprises a frame header, the frame header of the second data frame comprising a second field for indicating that the second payload portion is aggregated from a plurality of the first payload portions.

4. The method of claim 3, wherein the second field is a PTI field in the GEM frame; or the second field is OPTIONs fields in the XGEM frame.

5. The method of claim 1, wherein aggregating the plurality of first data frames to be transmitted to obtain a second data frame comprises:

respectively encapsulating each first data frame in the plurality of first data frames to obtain a plurality of third data frames; the third data frame obtained by the encapsulation processing of the first data frame comprises a first payload part in the first data frame;

and carrying out aggregation processing on the plurality of third data frames to obtain the second data frames.

6. The method of claim 1, wherein aggregating the plurality of first data frames to be transmitted to obtain a second data frame comprises:

Acquiring a plurality of first payload portions based on the plurality of first data frames;

And splicing the plurality of first payload parts to obtain the second data frame.

7. A data transmission method, applied to a data receiving end, the method comprising:

Receiving a compressed second data frame, wherein the compressed second data frame is obtained by aggregating a first payload part in each first data frame in a plurality of first data frames to be transmitted by a data sending terminal, compressing a data unit meeting a compression condition in the second payload part in the second data frame to obtain a compressed data unit, and obtaining the data unit based on the compressed data unit and the data unit not meeting the compression condition in the second payload part, the first data frame is an Ethernet data packet, and the first payload part of the first data frame comprises at least one of the following: a destination address, a source address, a type, a length, a data body, a frame check sequence, the second data frame being a GEM frame or an XGEM frame, the second data frame comprising a second payload portion comprising a first payload portion in each of the plurality of first data frames, the second payload portion comprising a plurality of data units, each data unit comprising k bits, k being an integer greater than 1, the compression condition comprising: the value of the first m bits in the data unit is a first value, the value of the last n bits is a second value, m is larger than a preset value, and the sum of m and n is equal to k; the compressed data unit comprises q bits, wherein the value of the first bit in the q bits is the first value, and the q-1 bits are used for indicating the value of m;

and obtaining the plurality of first data frames based on the compressed second data frames.

8. The method of claim 7, wherein the second payload portion further comprises a plurality of first fields, each first field corresponding to a first payload portion, the first fields being used to indicate a byte length of the corresponding first payload portion.

9. The method of claim 7, wherein the second data frame further comprises a frame header, the frame header of the second data frame comprising a second field for indicating that the second payload portion is aggregated from a plurality of the first payload portions.

10. The method of claim 9, wherein the second field is a PTI field in the GEM frame; or the second field is OPTIONs fields in the XGEM frame.

11. An electronic device, comprising: a memory and a processor; the memory is coupled to the processor; the memory is used for storing instructions executable by the processor; the processor, when executing the instructions, performs the method of any one of claims 1-6, or the method of any one of claims 7-10.

12. A computer readable storage medium having stored thereon computer instructions which, when run on a computer, cause the computer to perform the method of any of claims 1-6 or the method of any of claims 7-10.

13. A computer program product, characterized in that the computer program product, when run on a computer, causes the computer to perform the method according to any one of claims 1-6 or the method according to any one of claims 7-10.