CN109041120A - Data transmission method, device and computer readable storage medium - Google Patents

Abstract

The invention discloses a kind of data transmission methods, it include: that the first wireless spread-spectrum technology (RLC) entity carries out segment processing to received RLC service data unit (SDU), and generates a protocol Data Unit (PDU) using obtained each segmented content；Wherein, segmented index is carried at least one PDU；The segmented index indicates that corresponding PDU is corresponding and is segmented the striping order in the RLC SDU；The PDU of generation is sent to the 2nd RLC entity.The present invention also discloses a kind of data transmission device and computer readable storage mediums.

Description

Data transmission method, device and computer-readable storage medium

technical field

The present invention relates to the field of wireless communication, in particular to a data transmission method, device and computer-readable storage medium.

Background technique

In the Long Term Evolution (LTE, Long Term Evolution) system, as shown in FIG. 1 , the processing procedure of the UM Radio Link Control (RLC, Radio Link Control) entity at the sending side and the slice processing procedure of the UM RLC entity at the receiving side are specified. At the same time, in the fifth generation mobile communication (5G, Fifth Generation) system (also known as the new radio access (NR) system, massive connections and higher speed requirements of users, so the current processing shown in Figure 1 Flow process has been improved.Wherein, in the fragmentation slicing process of RLC entity, in the slice compensation (SO, SegmentationOffset) field of RLC header, identified protocol data unit (PDU, Protocol Data Unit) compared with RLC service data unit ( SDU, Service Data Unit) segmentation position.

However, the length of SO is relatively long, so the overhead is large.

Contents of the invention

In order to solve the existing technical problems, the embodiment of the present invention provides a data transmission method, device and computer-readable storage medium

The technical scheme of the embodiment of the present invention is realized like this:

An embodiment of the present invention provides a data transmission method, including:

The first RLC entity performs segmentation processing on the received RLC SDU, and generates a PDU using the obtained content of each segment; wherein, at least one PDU carries a segment index; the segment index indicates the segment corresponding to the corresponding PDU Segmentation order of segments in said RLC SDU;

Send the generated PDU to the second RLC entity.

In the above solution, at least the PDU of each middle segment carries a segment index; the middle segment is a segment except the first segment and the last segment among all the segments of the RLC SDU.

In the above scheme, when the obtained content of each segment is used to generate a PDU, the method includes:

For the PDU carrying the segment index, add an identification field in the packet header, place the corresponding segment index in the identification field, and remove the SO field in the packet header; the information in the SO field indicates that the corresponding PDU is compared with the RLC The segmentation position of the SDU.

In the above scheme, when the obtained content of each segment is used to generate a PDU, the method includes:

For each intermediate segmented PDU, add an identification field in the header, place the corresponding segment index in the identification field, and remove the SO field in the header; the information in the SO field indicates that the corresponding PDU is compared to the RLC The segmentation position of the SDU; the segmentation index placed in the identification field indicates the segmentation sequence of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU; the middle segment is all segments of the RLC SDU Subsections other than the first subsection and the last subsection in a section;

And the FI field in the packet header is set to indicate that the segment corresponding to the corresponding PDU is the first segment, the middle segment or the last segment.

In the above scheme, the method also includes:

According to the number of segments, the first field in the packet header is set with relevant indication information representing the bits occupied by the segment index.

In the above scheme, the method also includes:

When the number of segments is less than the preset threshold, determine that the format of the PDU is the first format; in the first format, the first line of the header includes: the first field, FI field, identification field, and sequence number field; the header includes the serial number field;

Or, when the number of segments is greater than or equal to the preset threshold, determine that the format of the PDU is the second format; in the second format, the first line of the header includes: a reserved field, a first field, an FI field, and The serial number field; the second line of the header includes the serial number field; at least one line after the second line in the header includes: the identification field.

In the above solution, the first RLC entity and the second RLC entity are AM RLC entities or UM RLC entities.

The embodiment of the present invention also provides a data transmission method, including:

the second RLC entity receives the PDU from the first RLC entity;

Perform packet reassembly on the received PDU to obtain the RLC SDU, and send it out; where,

During the reassembly process, the PDU is parsed to obtain the corresponding segment index;

Determine the segment sequence of the segment corresponding to the corresponding PDU in the RLC SDU according to the segment index.

In the above scheme, when parsing the PDU, the method includes:

Parse the header of the PDU, and obtain the corresponding segment index in the identification field.

In the above scheme, when parsing the PDU, the method includes:

Parse the header of the PDU, and obtain the corresponding segment index in the identification field;

Determine the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU according to the obtained segment index; the middle segment is all segments except the first segment and the last segment of the RLC SDU a segment outside a segment;

And in the FI field, obtain the indication information that the segment corresponding to the corresponding PDU is the first segment, the middle segment or the last segment;

Correspondingly, at least using the indication information of the FI field in each PDU and the segment index to determine the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU, perform packet reassembly.

In the above scheme, the method also includes:

When parsing the header, obtain relevant indication information representing bits occupied by the segment index in the first field;

Correspondingly, the bits indicated by the relevant indication information in the bits occupied by the identification field are analyzed to obtain the segment index.

In the above solution, the first RLC entity and the second RLC entity are AM RLC entities or UM RLC entities.

The embodiment of the present invention further provides a data transmission device, which is set in the first RLC entity, and the device includes:

The first processing unit is configured to perform segmentation processing on the received RLC SDU, and generate a PDU using the obtained content of each segment; wherein, at least one PDU carries a segment index; the segment index indicates the corresponding PDU The segment order of the corresponding segment in the RLC SDU;

The second processing unit is configured to send the generated PDU to the second RLC entity.

The embodiment of the present invention also provides a data transmission device, which is set in the second RLC entity, and the device includes:

a third processing unit, configured to receive a PDU from the first RLC entity;

The fourth processing unit is used to reassemble the received PDU and send it out; wherein,

During the reassembly process, the fourth processing unit parses the PDU to obtain a corresponding segment index; and determines the segment order of the segments corresponding to the corresponding PDU in the RLC SDU according to the segment index.

An embodiment of the present invention further provides a data transmission device, which is set in a first RLC entity, and includes: a first processor and a first memory for storing a computer program that can run on the processor,

Wherein, when the first processor is configured to run the computer program, it executes the steps of the above first RLC entity side method.

An embodiment of the present invention also provides a data transmission device, which is set in a second RLC entity, and includes: a second processor and a second memory for storing a computer program that can run on the processor,

Wherein, when the second processor is configured to run the computer program, it executes the steps of the above-mentioned second RLC entity side method.

An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned first RLC entity side method are implemented, or the above-mentioned second RLC entity side is implemented. method steps.

In the data transmission method, device, and computer-readable storage medium provided by the embodiments of the present invention, the first RLC-free entity performs segmentation processing on the received RLC SDU, and generates a PDU by using the content of each segment obtained; wherein, at least one A segment index is carried in the PDU; the segment index indicates the segment sequence of the segment corresponding to the PDU in the RLC SDU; the generated PDU is sent to the second RLC entity; and the second RLC entity performs the PDU Parse to obtain the corresponding segment index; determine the segment order of the segment corresponding to the corresponding PDU in the RLC SDU according to the segment index, because the segment index is used to indicate the segment order of the corresponding PDU, and the segment order It means that it needs less number of bits to indicate, instead of using the SO field to indicate. In this way, the overhead of the packet header is greatly saved without changing the package performance of the receiving end.

Description of drawings

In the drawings (which are not necessarily drawn to scale), like reference numerals may describe like parts in different views. The drawings generally illustrate the various embodiments discussed herein, by way of example and not limitation.

FIG. 1 is a schematic diagram of a processing flow of UM RLC in an LTE system;

FIG. 2 is a schematic flowchart of a data transmission method on the first RLC entity side according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of a PDU format according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of another PDU format according to an embodiment of the present invention;

5 is a schematic flowchart of a data transmission method on the second RLC entity side according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a data transmission process according to an embodiment of the present invention;

7 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of another data transmission device according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a hardware structure of a data transmission device according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of the hardware structure of another data transmission device according to an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, in the LTE system, the processing of the UM RLC entity on the sending side includes: first buffering the data after receiving it, then performing segmentation and concatenation processing, and then adding the RLC header (header) Then send the PDU; and the processing of the UM RLC entity on the receiving side includes: buffering the data from the PDCP, and recording the Hybrid Automatic Repeat reQuest (HARQ, Hybrid Automatic Repeat reQuest), and then removing the RLC header and performing reassembly Get SDU and send it out.

At the same time, improvements to the processing flow shown in Figure 1 in the NR system (consensus has been reached in the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project)), including:

1. The RLC packet header will indicate that the corresponding RLC PDU is a complete RLC SDU or a slice of the RLC SDU.

2. After the UM RLC entity on the receiving side receives the SDU from the MAC, if it indicates that it is a complete RLC SDU, it will directly submit it to the PDCP. If the indication is a slice of the RLC SDU, it needs to wait for other fragments to arrive at the UM RLC entity on the receiving side, and After the package is completed, it is submitted to PDCP.

3. For the RLC segmentation and resegmentation (resegmentation) processes, the SO field is used to identify the segmentation position of the PDU compared to the RLC SDU in the header format.

However, 3GPP stipulates that the length of the SO is 15 bits (bit), so the overhead of the RLC packet header is very large.

Based on this, in various embodiments of the present invention: the first RLC-free entity performs segmentation processing on the received RLC SDU, and generates a PDU by using the obtained content of each segment; wherein at least one PDU carries a segment Segment index; the segment index indicates the segment order of the segment corresponding to the corresponding PDU in the RLC SDU; the generated PDU is sent to the second RLC entity; and the second RLC entity parses the PDU to obtain the corresponding Segment index; determine the segment order of the corresponding segment of the corresponding PDU in the RLC SDU according to the segment index, because the segment index is used to indicate the segment sequence of the corresponding PDU, and the segment sequence refers to the need for less The number of bits can be indicated instead of using the SO field, thus greatly saving the overhead of the packet header.

A data transmission method provided by an embodiment of the present invention is applied to a first RLC entity.

Here, in actual application, the first RLC entity may be located in a user equipment (UE) or a base station (such as a 5G Node B (gNB), etc.).

As shown in Figure 2, the method includes:

Step 201: the first RLC entity performs segmentation processing on the received RLC SDU, and generates a PDU by using the obtained content of each segment;

Wherein, at least one PDU carries a segment index; the segment index indicates the segment order of the segments corresponding to the corresponding PDU in the RLC SDU.

In practical application, at least the PDU of each intermediate segment may carry a segment index; the segment index indicates the segment order of the segment corresponding to the corresponding PDU in the RLC SDU.

That is to say, the segment index indicates which segment of the RLC SDU the segment corresponding to the corresponding PDU is.

Here, the middle segment is a segment except the first segment and the last segment among all segments of the RLC SDU.

In actual application, for the format of the segment index, for example, a possible way: the value of the segment index is 0, 1, 2....

Here, in actual application, the first RLC entity receives the RLC SDU from the corresponding PDCP entity.

For the segment index, an identification field that can be recognized by the RLC layer can be added to the packet header of the PDU to indicate the segment index.

Based on this, in one embodiment, when generating a PDU using the obtained content of each segment, for each PDU carrying a segment index, add an identification field in the packet header, and place the corresponding segment index in the The field is identified, and the SO field in the header is removed; the information in the SO field indicates the segmentation position of the corresponding PDU compared to the RLC SDU.

In this way, the second RLC entity can perform packet reassembly according to the sequence number of the PDU and the segment sequence number determined by the segment index.

In addition, FI (Framing Info in English, for details, please refer to the 36.322 protocol) and the segment index can also be used to jointly indicate the positional relationship of the segment in the RLC SDU. The information in the FI field indicates the segmentation position of the PDU in the RLC SDU.

Based on this, in one embodiment, when generating a PDU using the obtained content of each segment, for each PDU in the middle segment, an identification field is added in the packet header, and the corresponding segment index is placed in the identification field , and remove the SO field in the header; the information in the SO field indicates the segmentation position of the corresponding PDU compared to the RLC SDU; the segment index placed in the identification field indicates that the segment corresponding to the PDU is in the RLC SDU The segmentation order of the middle segment of ;

And the FI field in the packet header is set to indicate that the segment corresponding to the corresponding PDU is the first segment, the middle segment or the last segment.

In this case, the information of the identification field and the FI field is used to indicate which segment of the RLC SDU the segment corresponding to the PDU is.

Specifically, for example, the FI can generally be 2 bits, and the joint indication manner of the information of the FI field and the information of the identification field is shown in Table 1.

FI ID field 00 Complete RLC SDU none 01 first segment none 10 last segment none 11 middle segment Indicates which segment

Table 1

In Table 1, when the value of FI is 11, and the value of the identification field is 00000011, (assuming that the identification field is 8 bits), then the PDU is the third middle segment of the RLC SDU, that is, the fourth segment of the RLC SDU segments.

In this way, the second RLC entity can use the indication information of the FI domain in each PDU and the segmentation sequence corresponding to the corresponding PDU determined by the segment index to perform packet reassembly in the segment sequence of the middle segment of the RLC SDU, not necessarily To rely on the sequence number for packet reassembly, this greatly reduces the processing complexity of the receiving end.

It can be seen from the above description that the SO field is removed from the packet header, that is, the SO field is no longer in the packet header of the PDU, and the identification field is replaced by it.

In addition, since the segmentation of the RLC SDU needs to refer to the scheduling information of the MAC layer (it can be understood as segmenting the received data according to the size specified by the MAC entity), so for each RLC SDU, the number of segments is limited. It must be fluctuating. Based on this situation, when the number of bits in the identification field is small, it may not satisfy the situation of a large number of segments; and when the number of bits in the identification field is large, there will be a waste of resources when the number of segments is small.

Based on this, in an embodiment, the method may also include:

According to the number of segments, the first field in the packet header is set with relevant indication information representing the bits occupied by the segment index.

After the second RLC entity receives the PDU, it can analyze the bits indicated by the relevant indication information in the bits occupied by the identification field according to the indication information of the first field, and it is not necessary to parse all the bits. In this way, The processing complexity of the RLC receiving end can be reduced.

For example, 1 bit can be set to indicate the length of the segment index, marked as S. For example, the value of S is 0, indicating that it is a short segment index, then the second RLC entity only needs to parse the bit represented by 0 in the identification field to obtain the segment index, and if the value of S is 1, it indicates It is a long segment index, and the second RLC entity needs to analyze all the bits in the identification field to obtain the segment index.

Considering the situation of the RLC packet header (FI length, sequence number length, bit alignment criterion, etc.) comprehensively, and combining the length of the segment miniature, in actual application, PDUs of different formats can be selected according to needs.

Based on this, in an embodiment, before generating the PDU, the method may further include:

When the number of segments is less than the preset threshold, determine that the format of the PDU is the first format; in the first format, the first line of the header includes: the first field, FI field, identification field, and sequence number field; the header includes the serial number field;

When the number of segments is greater than or equal to the preset threshold, determine that the format of the PDU is the second format; in the second format, the first row of the header includes: R domain, first domain, FI domain, and sequence number domain ; The second line of the header includes the serial number field; at least one line after the second line in the header includes: the identification field.

Wherein, the R field is a reserved bit. The preset threshold can be set as required, for example, set to 3 bits.

It can be seen from the above description that the first format is suitable for segmented indexes with a shorter length, that is, it is suitable for the case where the number of fragments is small, and the second format is suitable for a segmented In the case of a large number of slices.

For the first format, for example, as shown in Figure 3, in the header, the first line includes the first field (represented by the S field), the FI field, the identification field (represented by the Segmentation Index field) and the serial number domain (indicated by the SN domain), and the second row is the serial number domain.

In this format, the S field is 1 bit, the FI field is 2 bits, the Segmentation Index field is 3 bits, and the SN field is 10 bits.

In practical application, the length of each field in the packet header shown in FIG. 3 may also be other bits, which is not limited in this embodiment of the present invention.

For the second format, for example, as shown in Figure 4, in the header, the first line includes a reserved field (represented by the R field), a first field (represented by the S field), an FI field, and a serial number domain (indicated by SN domain); the second line is the serial number domain; the third and fourth lines identify the domain (indicated by the Segmentation Index domain).

In this format, the R field is 3 bits, the S field is 1 bit, the FI field is 2 bits, the Segmentation Index field is 16 bits, and the SN field is 10 bits.

In actual application, the length of each field in the header shown in FIG. 4 may also be other bits, which is not limited in this embodiment of the present invention.

It should be noted that the format shown in Figure 3 and Figure 4 is the PDU format in RLC UM (Unacknowledged Mode), and in RLC AM (Acknowledged Mode), there are other indication bits such as P field in the PDU, and the method is similar.

It can be seen from the above description that the length of the identification field in the second format is greater than the length of the identification field in the first format, so that it can meet the situation that the number of segments is large, for example, the number of segments is 256 and so on.

Step 202: Send the generated PDU to the second RLC entity.

Correspondingly, the embodiment of the present invention also provides a data transmission method, which is applied to the second RLC entity. Correspondingly, the second entity may also be located in a UE or a base station (such as gNB, etc.).

As shown in Figure 5, the method includes:

Step 501: the second RLC entity receives a PDU from the first RLC entity;

Here, in actual application, the second RLC entity receives the RLC SDU from the corresponding MAC entity.

Step 502: Perform packet reassembly on the received PDU to obtain an RLC SDU, and send it out.

Wherein, in the reassembly process, the PDU is parsed to obtain a corresponding segment index; the segment index indicates the segment sequence of the segment corresponding to the corresponding PDU in the RLC SDU;

Determine the segment sequence of the segment corresponding to the corresponding PDU in the RLC SDU according to the segment index.

The second RLC entity sorts the received PDUs according to the determined segmentation sequence and combined with the sequence numbers of the PDUs, and performs packet reassembly.

Specifically, the PDUs with the same sequence number are sorted according to the fragmentation order and the packets are reassembled.

In an embodiment, for the segment index, an identification field that can be recognized by the RLC layer may be added to the packet header of the PDU to indicate the segment index. At this time, when parsing the PDU, the second RLC entity parses the header of the PDU, obtains the corresponding segment index in the identification field, and the obtained segment index indicates which segment the corresponding segment of the PDU is the segment of the RLC SDU .

In addition, the FI and the segment index can also be used to jointly indicate the positional relationship of the segment in the RLC SDU. The information in the FI field indicates the segmentation position of the PDU in the RLC SDU.

Based on this, when parsing the PDU, the second RLC entity parses the header of the PDU, and obtains the corresponding segment index in the identification field;

Determine the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU according to the obtained segment index; the middle segment is all segments except the first segment and the last segment of the RLC SDU a segment outside a segment;

And in the FI field, obtain the indication information that the segment corresponding to the corresponding PDU is the first segment, the middle segment or the last segment;

Correspondingly, the second RLC entity at least uses the indication information of the FI field in each PDU and the segment index to determine the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU to perform packet reassembly.

That is to say, the second RLC can use the indication information of the FI field and the segment index to perform packet reassembly without necessarily relying on the sequence number to perform packet reassembly. In this way, the processing complexity of the receiving end is greatly reduced.

Of course, if there is a serial number in the packet header, the serial number can also be combined to reassemble the packet. Specifically, the PDUs with the same serial number are sorted according to the indication information of the FI field and the segment index, and the packet is reassembled.

When the PDU header also carries the indication information of the first field, when the second RLC entity parses the header, it obtains relevant indication information representing bits occupied by the segment index in the first field;

Correspondingly, the second RLC entity analyzes the bits indicated by the relevant indication information in the bits occupied by the identification field to obtain the segment index, and parses the bits in the bits occupied by the identification field according to the indication information in the first field. Only the bits indicated by the relevant indication information are sufficient, and it is not necessary to analyze all the bits. In this way, the processing complexity of the RLC receiving end can be reduced.

The second RLC entity sends the RLC SDU to the corresponding PDCP entity.

It can be seen from the above description that the data transmission process provided by the embodiment of the present invention, as shown in FIG. 6, mainly includes the following steps:

Step 601: The first RLC entity performs segmentation processing on the received RLC SDU, and generates a PDU by using the obtained content of each segment;

Wherein, at least one PDU carries a segment index; the segment index indicates the segment order of the segments corresponding to the corresponding PDU in the RLC SDU.

Step 602: the first RLC entity sends the generated PDU to the second RLC entity;

Step 603: the second RLC entity receives the PDU from the first RLC entity;

Step 604: repacketize the received PDU to obtain RLC SDU, and send it out.

Wherein, in the reassembly process, the PDU is analyzed to obtain the corresponding segment index;

Determine the segment sequence of the segment corresponding to the corresponding PDU in the RLC SDU according to the segment index.

The second RLC entity sorts the received PDUs according to the determined segmentation sequence and combined with the sequence numbers of the PDUs, and performs packet reassembly.

Here, in actual application, the solutions of the embodiments of the present invention can be applied to RLC AM and RLC UM. In these two modes, the corresponding RLC entities are AM RLC entity and RLC UM entity respectively. Therefore, the first RLC entity and the second RLC entity may be AM RLC entities or UM RLC entities.

Among them, RLC AM is the acknowledgment mode of RLC. In RLC AM, the RLC receiving end needs to feed back a status report to the RLC sending end, and the RLC sending end retransmits the data packets that are not correctly received by the receiving end according to the status report; RLC UM is RLC’s A mode that does not require confirmation.

In the data processing method provided by the embodiment of the present invention, the first RLC-free entity performs segmentation processing on the received RLC SDU, and generates a PDU by using the obtained content of each segment; wherein at least one PDU carries a segment index; The segment index indicates the segment order of the segment corresponding to the corresponding PDU in the RLC SDU; the generated PDU is sent to the second RLC entity; and the second RLC entity parses the PDU to obtain the corresponding segment index ; According to the segment index, determine the segment order of the corresponding segment of the corresponding PDU in the RLC SDU, because the segment index is used to indicate the segment order of the corresponding PDU, and the segment order refers to the need for fewer bits. It can be indicated instead of using the SO domain to indicate. In this way, the overhead of the packet header is greatly saved under the premise of not changing the package performance of the receiving end.

In order to implement the method of the embodiment of the present invention, the embodiment of the present invention also provides a data transmission device, which is set in the first RLC entity, as shown in FIG. 7, the device includes:

The first processing unit 71 is configured to perform segmentation processing on the received RLC service data unit SDU, and generate a PDU using the obtained content of each segment; wherein, at least one PDU carries a segment index; the segment The index indicates the segment order of the segment corresponding to the corresponding PDU in the RLC SDU;

The second processing unit 72 is configured to send the generated PDU to the second RLC entity.

In actual application, at least the PDU of each intermediate segment may carry a segment index; the intermediate segment is a segment except the first segment and the last segment in all segments of the RLC SDU .

In an embodiment, the first processing unit 71 is specifically configured to:

When generating a PDU by using each segmented content obtained, for the PDU carrying the segmented index, add an identification domain in the header, place the corresponding segmented index in the identified domain, and remove the SO domain in the header; The information in the SO field indicates the segmentation position of the corresponding PDU compared to the RLC SDU.

In an embodiment, the first processing unit 71 is specifically configured to:

When generating a PDU by using each segmented content obtained, for each intermediate segmented PDU, add an identification domain in the header, place the corresponding segment index in the identification domain, and remove the SO domain in the header; The information in the SO field indicates the segmentation position of the corresponding PDU compared to the RLC SDU; the segment index placed in the identification field indicates the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU; The middle segment is a segment except the first segment and the last segment in all segments of the RLC SDU;

And the FI field in the packet header is set to indicate that the segment corresponding to the corresponding PDU is the first segment, the middle segment or the last segment.

In an embodiment, the first processing unit 71 is further configured to:

According to the number of segments, the first field in the packet header is set with relevant indication information representing the bits occupied by the segment index.

In an embodiment, the first processing unit 71 is further configured to:

When the number of segments is less than the preset threshold, determine that the format of the PDU is the first format; in the first format, the first line of the header includes: the first field, FI field, identification field, and sequence number field; the header includes the serial number field;

When the number of segments is greater than or equal to the preset threshold, determine that the format of the PDU is the second format; in the second format, the first line of the header includes: R domain, first domain, FI domain, and sequence number domain ; The second line of the header includes the serial number field; at least one line after the second line in the header includes: the identification field.

In actual application, the first processing unit 71 and the second processing unit 72 may be implemented by a processor in the data transmission device.

In order to implement the method of the embodiment of the present invention, the embodiment of the present invention also provides another data transmission device, which is set in the second RLC entity, as shown in FIG. 8, the device includes:

The third processing unit 81 is configured to receive a PDU from the first RLC entity;

The fourth processing unit 82 is configured to reassemble the received PDU and send it out; wherein,

During the reassembly process, the fourth processing unit 82 parses the PDU to obtain the corresponding segment index; and determines the segment order of the segments corresponding to the corresponding PDU in the RLC SDU according to the segment index.

Wherein, the segment index indicates the segment sequence of the segment corresponding to the corresponding PDU in the RLC SDU.

In an embodiment, the fourth processing unit 82 is specifically configured to:

When parsing the PDU, the header of the PDU is parsed, and the corresponding segment index is obtained in the identification field.

In an embodiment, the fourth processing unit 82 is specifically configured to:

When parsing the PDU, the packet header of the PDU is parsed, and the corresponding segment index is obtained in the identification field; according to the obtained segment index, the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU is determined; The middle segment is a segment except the first segment and the last segment in all segments of the RLC SDU;

And in the FI field, obtain the indication information that the segment corresponding to the corresponding PDU is the first segment, the middle segment or the last segment;

Correspondingly, at least using the indication information of the FI field in each PDU and the segment index to determine the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU, perform packet reassembly.

In an embodiment, the fourth processing unit 82 is further configured to:

When parsing the header, obtain relevant indication information representing bits occupied by the segment index in the first field;

Correspondingly, the bits indicated by the relevant indication information in the bits occupied by the identification field are analyzed to obtain the segment index.

In actual application, the third processing unit 81 and the fourth processing unit 82 may be implemented by a processor in the data transmission device.

It should be noted that: when the data transmission device provided by the above-mentioned embodiment performs data processing, the division of the above-mentioned program modules is used as an example for illustration. In practical applications, the above-mentioned processing allocation can be completed by different program modules as required. The internal structure of the device is divided into different program modules to complete all or part of the processing described above. In addition, the data transmission device and the data transmission method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process thereof is detailed in the method embodiments, and will not be repeated here.

Based on the hardware implementation of the above-mentioned program modules, an embodiment of the present invention provides a hardware structure of a data transmission device, which is set in the first RLC entity. As shown in FIG. 9, the device 90 includes:

A first processor 91 and a first memory 92 for storing computer programs that can run on the processor, wherein,

When the first processor 91 is used to run the computer program, execute:

Perform segmentation processing on the received RLC SDU, and generate a PDU using the obtained content of each segment; wherein, at least one PDU carries a segment index; the segment index indicates that the segment corresponding to the corresponding PDU is in the Segmentation order in RLC SDU;

Send the generated PDU to the second RLC entity.

Wherein, in one embodiment, at least the PDU of each intermediate segment carries a segment index; the intermediate segment is all segments of the RLC SDU except the first segment and the last segment segment.

In one embodiment, when the first processor 91 is used to run the computer program, execute:

When generating a PDU by using the content of each segment obtained, for each PDU carrying a segment index, add an identification field in the packet header, put the corresponding segment index in the identification field, and remove the SO in the packet header field; the information in the SO field indicates the segmentation position of the corresponding PDU compared to the RLC SDU.

In one embodiment, when the first processor 91 is used to run the computer program, execute:

When generating a PDU by using each segmented content obtained, for each intermediate segmented PDU, add an identification domain in the header, place the corresponding segment index in the identification domain, and remove the SO domain in the header; The information in the SO field indicates the segmentation position of the corresponding PDU compared to the RLC SDU; the segment index placed in the identification field indicates the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU; The middle segment is a segment except the first segment and the last segment in all segments of the RLC SDU;

And the FI field in the packet header is set to indicate that the segment corresponding to the corresponding PDU is the first segment, the middle segment or the last segment.

In one embodiment, the first processor 91 is also configured to execute the computer program when running:

According to the number of segments, the first field in the packet header is set with relevant indication information representing the bits occupied by the segment index.

In one embodiment, the first processor 91 is also configured to execute the computer program when running:

When the number of segments is less than the preset threshold, determine that the format of the PDU is the first format; in the first format, the first line of the header includes: the first field, FI field, identification field, and sequence number field; the header includes the serial number field;

Or, when the number of segments is greater than or equal to the preset threshold, determine that the format of the PDU is the second format; in the second format, the first line of the header includes: a reserved field, a first field, an FI field, and The serial number field; the second line of the header includes the serial number field; at least one line after the second line in the header includes: the identification field.

In an embodiment, the first RLC entity and the second RLC entity may be AM RLC entities or UM RLC entities.

Of course, in actual application, as shown in FIG. 9 , various components in the data transmission device 90 are coupled together through a bus system 93 . It can be understood that the bus system 93 is used to realize connection and communication between these components. In addition to the data bus, the bus system 93 also includes a power bus, a control bus and a status signal bus. However, the various buses are labeled as bus system 93 in FIG. 9 for clarity of illustration.

The first memory 92 in the embodiment of the present invention is used to store various types of data to support the operation of the information processing device 90 .

The methods disclosed in the foregoing embodiments of the present invention may be applied to the first processor 91 or implemented by the first processor 91 . The first processor 91 may be an integrated circuit chip, which has a signal processing capability. During implementation, each step of the above-mentioned method may be completed by an integrated logic circuit of hardware in the first processor 91 or instructions in the form of software. The aforementioned first processor 91 may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. The first processor 91 may implement or execute various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, and the storage medium is located in the first memory 92. The first processor 91 reads the information in the first memory 92, and completes the steps of the foregoing method in combination with its hardware.

In an exemplary embodiment, the data transmission device 90 may be implemented by one or more Application Specific Integrated Circuit (ASIC, Application Specific Integrated Circuit), DSP, Programmable Logic Device (PLD, ProgrammableLogic Device), Complex Programmable Logic Device (CPLD , Complex Programmable Logic Device), field-programmable gate array (FPGA, Field-Programmable Gate Array), general-purpose processor, controller, microcontroller (MCU, Micro Controller Unit), microprocessor (Microprocessor), or other electronic The component is implemented for performing the aforementioned method.

In order to implement the method of the embodiment of the present invention, the embodiment of the present invention provides a data transmission device, which is set in the second RLC entity. As shown in FIG. 10, the device 100 includes:

A second processor 101 and a second memory 102 for storing computer programs that can run on the first processor; wherein,

When the second processor 101 is used to run the computer program, execute:

receiving a PDU from a first RLC entity;

Perform packet reassembly on the received PDU to obtain the RLC SDU, and send it out; where,

In the reassembly process, the PDU is parsed to obtain a corresponding segment index; the segment index indicates the segment order of the segment corresponding to the corresponding PDU in the RLC SDU;

Determine the segment sequence of the segment corresponding to the corresponding PDU in the RLC SDU according to the segment index.

In one embodiment, when the second processor 101 is configured to run the computer program, execute:

When parsing the PDU, the header of the PDU is parsed, and the corresponding segment index is obtained in the identification field.

In one embodiment, when the second processor 101 is configured to run the computer program, execute:

When parsing the PDU, the header of the PDU is parsed, and the corresponding segment index is obtained in the identification field;

Determine the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU according to the obtained segment index; the middle segment is all segments except the first segment and the last segment of the RLC SDU a segment outside a segment;

And in the FI field, obtain the indication information that the segment corresponding to the corresponding PDU is the first segment, the middle segment or the last segment;

Correspondingly, at least using the indication information of the FI field in each PDU and the segment index to determine the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU, perform packet reassembly.

In one embodiment, the second processor 101 is further configured to execute the computer program when executing:

When parsing the header, obtain relevant indication information representing bits occupied by the segment index in the first field;

Correspondingly, the bits indicated by the relevant indication information in the bits occupied by the identification field are analyzed to obtain the segment index.

In an embodiment, the first RLC entity and the second RLC entity may be AM RLC entities or UM RLC entities.

Of course, in actual application, as shown in FIG. 10 , various components in the data transmission device 100 are coupled together through the bus system 103 . It can be understood that the bus system 103 is used to realize connection and communication between these components. In addition to the data bus, the bus system 103 also includes a power bus, a control bus and a status signal bus. However, the various buses are labeled as bus system 103 in FIG. 10 for clarity of illustration.

The second memory 102 in the embodiment of the present invention is used to store various types of data to support the operation of the data transmission device 100 .

The methods disclosed in the foregoing embodiments of the present invention may be applied to the second processor 101 or implemented by the second processor 101 . The second processor 101 may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the second processor 101 or instructions in the form of software. The aforementioned second processor 101 may be a general-purpose processor, DSP, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. The second processor 101 may implement or execute various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention can be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, and the storage medium is located in the second storage 102, and the second processor 101 reads information in the second storage 102, and completes the steps of the foregoing method in combination with its hardware.

In an exemplary embodiment, the data transmission device 100 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general-purpose processors, controllers, MCUs, microprocessors (Microprocessor), or other electronic components. to perform the aforementioned method.

It can be understood that the memory (such as the first memory 92 and the second memory 102) in the embodiment of the present invention can be a volatile memory or a non-volatile memory, and can also include both volatile and non-volatile memory . Wherein, non-volatile memory can be read-only memory (ROM, Read Only Memory), programmable read-only memory (PROM, Programmable Read-Only Memory), erasable programmable read-only memory (EPROM, ErasableProgrammable Read-Only Memory) Memory), Electrically Erasable Programmable Read-Only Memory (EEPROM, ElectricallyErasable Programmable Read-Only Memory), Magnetic Random Access Memory (FRAM, ferromagnetic random access memory), Flash Memory (Flash Memory), Magnetic Surface Memory, CD-ROM, Or CD-ROM (Compact Disc Read-Only Memory); magnetic surface storage can be disk storage or tape storage. The volatile memory may be random access memory (RAM, Random Access Memory), which is used as an external cache. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM, Static Random Access Memory), Synchronous Static Random Access Memory (SSRAM, Synchronous Static Random Access Memory), Dynamic Random Access Memory (DRAM, Dynamic Random Access Memory), Synchronous Dynamic Random Access Memory (SDRAM, Synchronous Dynamic Random Access Memory), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM, Double Data Rate Synchronous Dynamic Random Access Memory), Enhanced Synchronous Dynamic Random Access Memory Access memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), synchronous connection dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), direct memory bus random access memory (DRRAM, Direct Rambus Random Access Memory). The memory described by embodiments of the present invention is intended to include, but not be limited to, these and any other suitable types of memory.

In an exemplary embodiment, the embodiment of the present invention also provides a computer-readable storage medium, for example, including a first memory 92 storing a computer program, and the above-mentioned computer program can be executed by the first processor 91 of the data transmission device 90 to Complete the steps described in the preceding method. Alternatively, the computer-readable storage medium includes a second memory 102 storing a computer program, and the above-mentioned computer program can be executed by the second processor 101 of the data transmission device 100 to complete the steps in the foregoing method.

That is to say, the computer-readable storage medium provided by the embodiment of the present invention has a computer program stored thereon, and when the computer program is executed by a processor, it realizes the steps of the above-mentioned first RLC entity side method, or realizes the above-mentioned second RLC entity side method. The steps of the side method.

It should be noted that: the computer-readable storage medium provided by the embodiment of the present invention can be FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disk, or CD-ROM, etc.; One or any combination of various devices.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (27)

1. A data transmission method, characterized in that the method comprises: The first radio link control RLC entity performs segmentation processing on the received RLC service data unit SDU, and generates a protocol data unit PDU using the obtained content of each segment; wherein at least one PDU carries a segment index; The segment index indicates the segment order of the segment corresponding to the corresponding PDU in the RLC SDU; Send the generated PDU to the second RLC entity. 2. The method according to claim 1, wherein at least the PDU of each intermediate segment carries a segment index; the intermediate segment is all segments of the RLC SDU except the first segment segment and segments other than the last segment. 3. The method according to claim 1, wherein, when generating a PDU using each segmented content obtained, the method comprises: For the PDU carrying the segment index, add an identification field in the packet header, place the corresponding segment index in the identification field, and remove the slice compensation SO field in the packet header; the information in the SO field indicates that the corresponding PDU is compared In the segmentation position of the RLC SDU. 4. The method according to claim 1, wherein, when generating a PDU using each segmented content obtained, the method comprises: For each intermediate segmented PDU, add an identification field in the header, place the corresponding segment index in the identification field, and remove the SO field in the header; the information in the SO field indicates that the corresponding PDU is compared to the RLC The segmentation position of the SDU; the segmentation index placed in the identification field indicates the segmentation sequence of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU; the middle segment is all segments of the RLC SDU Subsections other than the first subsection and the last subsection in a section; And the FI field in the packet header is set to indicate that the segment corresponding to the corresponding PDU is the first segment, the middle segment or the last segment. 5. according to the described method of claim 3 or 4, it is characterized in that, described method also comprises: According to the number of segments, the first field in the packet header is set with relevant indication information representing the bits occupied by the segment index. 6. The method according to claim 5, further comprising: When the number of segments is less than the preset threshold, determine that the format of the PDU is the first format; in the first format, the first line of the header includes: the first field, FI field, identification field, and sequence number field; the header includes the serial number field; Or, when the number of segments is greater than or equal to the preset threshold, determine that the format of the PDU is the second format; in the second format, the first line of the header includes: a reserved field, a first field, an FI field, and The serial number field; the second line of the header includes the serial number field; at least one line after the second line in the header includes: the identification field. 7. The method according to any one of claims 1 to 4, wherein the first RLC entity and the second RLC entity are AM RLC entities or UM RLC entities. 8. A data transmission method, characterized in that the method comprises: the second RLC entity receives the PDU from the first RLC entity; Perform packet reassembly on the received PDU to obtain the RLC SDU, and send it out; where, During the reassembly process, the PDU is parsed to obtain the corresponding segment index; Determine the segment sequence of the segment corresponding to the corresponding PDU in the RLC SDU according to the segment index. 9. The method according to claim 8, wherein when parsing the PDU, the method comprises: Parse the header of the PDU, and obtain the corresponding segment index in the identification field. 10. The method according to claim 8, wherein, when parsing the PDU, the method comprises: Parse the header of the PDU, and obtain the corresponding segment index in the identification field; Determine the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU according to the obtained segment index; the middle segment is all segments except the first segment and the last segment of the RLC SDU a segment outside a segment; And in the FI field, obtain the indication information that the segment corresponding to the corresponding PDU is the first segment, the middle segment or the last segment; Correspondingly, at least using the indication information of the FI field in each PDU and the segment index to determine the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU, perform packet reassembly. 11. The method according to claim 9 or 10, further comprising: When parsing the header, obtain relevant indication information representing bits occupied by the segment index in the first field; Correspondingly, the bits indicated by the relevant indication information in the bits occupied by the identification field are analyzed to obtain the segment index. 12. The method according to any one of claims 8 to 10, wherein the first RLC entity and the second RLC entity are AM RLC entities or UM RLC entities. 13. A data transmission device, characterized in that it is set at the first RLC entity, and the device comprises: The first processing unit is configured to perform segmentation processing on the received RLC SDU, and generate a protocol data unit PDU using the obtained content of each segment; wherein, at least one PDU carries a segment index; the segment index Indicate the segment order of the segment corresponding to the corresponding PDU in the RLC SDU; The second processing unit is configured to send the generated PDU to the second RLC entity. 14. A data transmission device, characterized in that it is arranged in a second RLC entity, and the device comprises: a third processing unit, configured to receive a PDU from the first RLC entity; The fourth processing unit is used to reassemble the received PDU and send it out; wherein, During the reassembly process, the fourth processing unit parses the PDU to obtain a corresponding segment index; and determines the segment order of the segments corresponding to the corresponding PDU in the RLC SDU according to the segment index. 15. A data transmission device, characterized in that it is set in a first RLC entity, comprising: a first processor and a first memory for storing a computer program that can run on the processor, Wherein, when the first processor is used to run the computer program, it executes: Perform segmentation processing on the received RLC SDU, and generate a PDU using the obtained content of each segment; wherein, at least one PDU carries a segment index; the segment index indicates that the segment corresponding to the corresponding PDU is in the Segmentation order in RLC SDU; Send the generated PDU to the second RLC entity. 16. The device according to claim 15, wherein at least the PDU of each intermediate segment carries a segment index; the intermediate segment is all segments except the first segment of the RLC SDU segment and segments other than the last segment. 17. The device according to claim 15, wherein when the first processor is used to run the computer program, execute: When generating a PDU by using each segmented content obtained, for the PDU carrying the segmented index, add an identification domain in the header, place the corresponding segmented index in the identified domain, and remove the SO domain in the header; The information in the SO field indicates the segmentation position of the corresponding PDU compared to the RLC SDU. 18. The device according to claim 15, wherein when the first processor is used to run the computer program, execute: When generating a PDU by using each segmented content obtained, for each intermediate segmented PDU, add an identification domain in the header, place the corresponding segment index in the identification domain, and remove the SO domain in the header; The information in the SO field indicates the segmentation position of the corresponding PDU compared to the RLC SDU; the segment index placed in the identification field indicates the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU; And the FI field in the packet header is set to indicate that the segment corresponding to the corresponding PDU is the first segment, the middle segment or the last segment. 19. The device according to claim 17 or 18, wherein the first processor is further configured to execute: when running the computer program: According to the number of segments, the first field in the packet header sets relevant indication information representing bits occupied by the segment index. 20. The device according to claim 19, wherein the first processor is further configured to execute: when running the computer program: When the number of segments is less than the preset threshold, determine that the format of the PDU is the first format; in the first format, the first line of the header includes: the first field, FI field, identification field, and sequence number field; the header includes the serial number field; Or, when the number of segments is greater than or equal to the preset threshold, determine that the format of the PDU is the second format; in the second format, the first line of the header includes: a reserved field, a first field, an FI field, and The serial number field; the second line of the header includes the serial number field; at least one line after the second line in the header includes: the identification field. 21. The device according to any one of claims 15-18, wherein the first RLC entity and the second RLC entity are AM RLC entities or UM RLC entities. 22. A data transmission device, characterized in that it is arranged in a second RLC entity, comprising: a second processor and a second memory for storing a computer program that can run on the processor, Wherein, when the second processor is used to run the computer program, it executes: receiving a PDU from a first RLC entity; Perform packet reassembly on the received PDU to obtain the RLC SDU, and send it out; where, During the reassembly process, the PDU is parsed to obtain the corresponding segment index; Determine the segment sequence of the segment corresponding to the corresponding PDU in the RLC SDU according to the segment index. 23. The device according to claim 22, wherein when the second processor is used to run the computer program, execute: When parsing the PDU, the header of the PDU is parsed, and the corresponding segment index is obtained in the identification field. 24. The device according to claim 22, wherein when the second processor is used to run the computer program, execute: When parsing the PDU, the header of the PDU is parsed, and the corresponding segment index is obtained in the identification field; Determine the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU according to the obtained segment index; the middle segment is all segments except the first segment and the last segment of the RLC SDU a segment outside a segment; And in the FI field, obtain the indication information that the segment corresponding to the corresponding PDU is the first segment, the middle segment or the last segment; Correspondingly, at least using the indication information of the FI field in each PDU and the segment index to determine the segment order of the segment corresponding to the corresponding PDU in the middle segment of the RLC SDU, perform packet reassembly. 25. The device according to claim 23 or 24, wherein when the second processor is running the computer program, it executes: When parsing the header, obtain relevant indication information representing bits occupied by the segment index in the first field; Correspondingly, the bits indicated by the relevant indication information in the bits occupied by the identification field are analyzed to obtain the segment index. 26. The device according to any one of claims 22 to 24, wherein the first RLC entity and the second RLC entity are AM RLC entities or UM RLC entities. 27. A computer-readable storage medium, on which a computer program is stored, characterized in that, when the computer program is executed by a processor, it implements the steps of any one of claims 1 to 7, or implements claim 8 to the step of any one of 12 methods.