CN109041120A

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

Info

Publication number: CN109041120A
Application number: CN201710438832.5A
Authority: CN
Inventors: 黄学艳; 孙军帅; 王莹莹; 韩星宇; 易芝玲
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Co Ltd
Priority date: 2017-06-12
Filing date: 2017-06-12
Publication date: 2018-12-18

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 communications, and in particular, to a data transmission method, an apparatus, and a computer-readable storage medium.

Background

In a Long Term Evolution (LTE) system, as shown in fig. 1, a processing procedure of a UM Radio Link Control (RLC) entity of a transmitting side and a slice processing procedure of an UM RLC entity of a receiving side are specified. Meanwhile, in a Fifth Generation mobile communication (5G) system (which may also be referred to as a new radio access (NR) system, a huge amount of connections and higher rate requirements of users are required, SO the processing flow shown in fig. 1 is currently improved, wherein, in the slice slicing process of the RLC entity, the slicing position of a Protocol Data Unit (PDU) compared with an RLC Service Data Unit (SDU) is identified in the slice compensation (SO) field of the RLC header.

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

Disclosure of Invention

To solve the existing technical problem, embodiments of the present invention provide a data transmission method, an apparatus, and a computer-readable storage medium

The technical scheme of the embodiment of the invention is realized as follows:

the embodiment of the invention provides a data transmission method, which comprises the following steps:

the first RLC entity carries out segmentation processing on the received RLC SDU and generates a PDU by utilizing each obtained segmentation content; wherein, at least one PDU carries a segment index; the segmentation index indicates the segmentation sequence of the corresponding segment of the corresponding PDU in the RLC SDU;

and transmitting the generated PDU to a second RLC entity.

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

In the above scheme, when generating one PDU using each obtained segment content, the method includes:

aiming at the PDU carrying the segment index, adding an identification field in a packet header, placing the corresponding segment index in the identification field, and removing an SO field in the packet header; the information of the SO field indicates a slicing position of the corresponding PDU compared to the RLC SDU.

adding an identification field in a packet header aiming at each PDU of the middle segment, placing a corresponding segment index in the identification field, and removing an SO field in the packet header; the information of the SO domain indicates the segmentation position of the corresponding PDU compared with the RLC SDU; the segmentation index arranged in the identification field indicates the segmentation sequence of the corresponding segment of the corresponding PDU in the middle segment of the RLC SDU; the middle segmentation is the segmentation of all the segments of the RLC SDU except the first segment and the last segment;

and setting the indication information of the corresponding PDU segment as the first segment, the middle segment or the last segment in the FI field of the packet header.

In the above scheme, the method further comprises:

and setting related indication information representing the bit occupied by the segment index in a first domain in the packet header according to the number of the segments.

In the above scheme, the method further comprises:

when the number of the segments is smaller than a preset threshold value, determining that the format of the PDU is a first format; in the first format, a first line of the packet header includes: the first field, the FI field, the identification field and the serial number field; the packet header comprises a serial number field;

or when the number of the segments is greater than or equal to a preset threshold value, determining that the format of the PDU is a second format; in the second format, a first line of the packet header includes: a reserved domain, a first domain, an FI domain and a sequence number domain; the second row of the packet header comprises a sequence number field; at least one line subsequent to the second line in the packet header includes: a domain is identified.

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

The embodiment of the invention also provides a data transmission method, which comprises the following steps:

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

performing packet reassembly on the received PDU to obtain RLC SDU, and sending out; wherein,

in the process of recombination, the PDU is analyzed to obtain a corresponding segment index;

and determining the segmentation sequence of the corresponding segment of the corresponding PDU in the RLC SDU according to the segmentation index.

In the above scheme, when the PDU is analyzed, the method includes:

and analyzing the packet header of the PDU, and obtaining a corresponding segment index in the identification domain.

In the above scheme, when the PDU is analyzed, the method includes:

analyzing the packet header of the PDU, and obtaining a corresponding segment index in the identification domain;

determining the segmentation sequence of the corresponding segment of the PDU in the middle segment of the RLC SDU according to the obtained segmentation index; the middle segmentation is the segmentation of all the segments of the RLC SDU except the first segment and the last segment;

and obtaining indication information that the corresponding PDU segment is a first segment, a middle segment or a last segment in the FI domain;

correspondingly, at least the segmentation sequence of the middle segmentation of the RLC SDU is subjected to packet reassembly by using the segmentation corresponding to the corresponding PDU determined by the indication information of the FI field and the segmentation index in each PDU.

In the above scheme, the method further comprises:

when the packet header is analyzed, obtaining related indication information representing the bit occupied by the segmented index in a first domain;

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

An embodiment of the present invention further provides a data transmission apparatus, which is disposed in a first RLC entity, and the apparatus includes:

the first processing unit is used for carrying out segmentation processing on the received RLC SDU and generating a PDU by utilizing each obtained segmentation content; wherein, at least one PDU carries a segment index; the segmentation index indicates the segmentation sequence of the corresponding segment of the corresponding PDU in the RLC SDU;

and the second processing unit is used for sending the generated PDU to the second RLC entity.

The embodiment of the invention also provides a data transmission device, which is arranged at the second RLC entity, and the device comprises:

a third processing unit for receiving the PDU from the first RLC entity;

the fourth processing unit is used for recombining the received PDU and sending out the PDU; wherein,

in the process of recombination, the fourth processing unit analyzes the PDU to obtain a corresponding segment index; and determining the segmentation sequence of the corresponding segment of the PDU in the RLC SDU according to the segmentation index.

An embodiment of the present invention further provides a data transmission apparatus, which is disposed in a first RLC entity, and includes: a first processor and a first memory for storing a computer program capable of running on the processor,

wherein the first processor is configured to execute the steps of the first RLC entity side method when running the computer program.

The embodiment of the present invention further provides a data transmission apparatus, which is arranged in the second RLC entity, and includes: a second processor and a second memory for storing a computer program capable of running on the processor,

wherein the second processor is configured to execute the steps of the second RLC entity side method when the computer program is executed.

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

In the data transmission method, apparatus, and computer-readable storage medium provided in the embodiments of the present invention, a first RLC entity performs segmentation processing on a received RLC SDU, and generates a PDU using each obtained segmentation content; wherein, at least one PDU carries a segment index; the segmentation index indicates the segmentation sequence of the corresponding segment of the corresponding PDU in the RLC SDU; sending the generated PDU to a second RLC entity; the second RLC entity analyzes the PDU to obtain a corresponding segmentation index; the segmentation index is used to indicate the segmentation sequence of the corresponding PDU in the RLC SDU, and the segmentation sequence can be indicated by a small number of bits without using an SO domain, SO that the cost of a packet header is greatly saved on the premise of not changing the packet packing performance of a receiving end and the like.

Drawings

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

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

fig. 2 is a flowchart illustrating a data transmission method in a first RLC entity according to an embodiment of the present invention;

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

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

fig. 5 is a flowchart illustrating a data transmission method at 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;

FIG. 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 apparatus according to an embodiment of the present invention;

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

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

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1, in the LTE system, the processing of the UM RLC entity on the transmitting side includes: after receiving data, caching, then carrying out segmentation (segmentation) and concatenation (concatenation) processing, and then sending out PDU after adding RLC message header (header); and the processing of the UM RLC entity on the receiving side includes: caching data from the PDCP, recording a Hybrid Automatic Repeat reQuest (HARQ), removing an RLC header, performing packing (reassembling) to obtain an SDU, and sending the SDU.

Meanwhile, an improvement of the process flow shown in fig. 1 in the NR system (consensus has been reached in the third Generation Partnership Project (3 GPP)), includes:

1. the RLC header indicates whether the corresponding RLC PDU is a complete RLC SDU or a slice of an RLC SDU.

2. After receiving MAC SDU, the UM RLC entity at receiving side directly submits to PDCP if it is indicated as complete RLC SDU, if it is indicated as slice of RLC SDU, it needs to wait for other slices to reach UM RLC entity at receiving side, and after completing package, submits to PDCP.

3. For both RLC segmentation and re-segmentation (re-segmentation) procedures, the segmentation position of the PDU compared to the RLC SDU is identified in the header in the SO field.

However, since the length of SO is specified to be 15 bits (bit) in 3GPP, the overhead of the RLC header is large.

Based on this, in various embodiments of the invention: the first RLC entity carries out segmentation processing on the received RLC SDU and generates a PDU by utilizing each obtained segmentation content; wherein, at least one PDU carries a segment index; the segmentation index indicates the segmentation sequence of the corresponding segment of the corresponding PDU in the RLC SDU; sending the generated PDU to a second RLC entity; the second RLC entity analyzes the PDU to obtain a corresponding segmentation index; and determining the segmentation sequence of the corresponding segment of the PDU in the RLC SDU according to the segmentation index, wherein the segmentation index is used for indicating the segmentation sequence of the corresponding PDU, and the segmentation sequence can be indicated by needing less bit number without using an SO domain for indication, SO that the expense of a packet header is greatly saved.

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

Here, in practical applications, the first RLC entity may be located in a User Equipment (UE) or a base station (e.g., a 5G node B (gNB), etc.).

As shown in fig. 2, the method includes:

step 201: the first RLC entity carries out segmentation processing on the received RLC SDU and generates a PDU by utilizing each obtained segmentation content;

wherein, at least one PDU carries a segment index; the segmentation index indicates the segmentation order of the corresponding segment of the corresponding PDU in the RLC SDU.

In actual application, at least each PDU of the middle segment may carry a segment index; the segmentation index indicates the segmentation order of the corresponding segment of the corresponding PDU in the RLC SDU.

That is, the segmentation index indicates that the corresponding PDU corresponds to the segment of the RLC SDU.

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

In practical applications, for example, for the format of the segment index, one possible way is: the segment index takes the values 0,1,2 … ….

Here, the first RLC entity receives RLC SDUs from the corresponding PDCP entity in actual use.

For the segment index, an identification field recognizable by the RLC layer may be added to the header of the PDU to indicate the segment index.

Based on this, in an embodiment, when one PDU is generated by using each obtained segment content, for each PDU carrying a segment index, an identification field is added in a packet header, the corresponding segment index is placed in the identification field, and an SO field in the packet header is removed; the information of the SO field indicates a slicing position of the corresponding PDU compared to the RLC SDU.

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

In addition, FI (framework Info in english, specifically, refer to 36.322 protocol) and a segment index may be used to jointly indicate the position relationship of the segment in the RLC SDU. Wherein the information of the FI field indicates a segmentation position of the PDU in the RLC SDU.

Based on this, in an embodiment, when generating one PDU by using the obtained content of each segment, for each PDU of the middle segment, an identification field is added in the packet header, the corresponding segment index is placed in the identification field, and the SO field in the packet header is removed; the information of the SO domain indicates the segmentation position of the corresponding PDU compared with the RLC SDU; the segmentation index arranged in the identification field indicates the segmentation sequence of the corresponding segment of the corresponding PDU in the middle segment of the RLC SDU;

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

Specifically, for example, the FI may be generally 2 bits, and the manner of jointly indicating the information of the FI field and the information of the identification field is shown in table 1.

FI		Identification field
			00	Complete RLC SDU	Is free of
01	First segment	Is free of
			10	Last segment	Is free of
11	Intermediate section	Indicated as the first segment

TABLE 1

In table 1, when the FI value is 11, the identification field value is 00000011, (it is assumed that the identification field is 8 bits), the PDU is the 3rd middle segment of the RLC SDU, that is, the 4 th segment of the RLC SDU.

In this way, the second RLC entity can perform packet reassembly in the segmentation order of the middle segment of the RLC SDU by using the indication information of the FI field in each PDU and the segment corresponding to the corresponding PDU determined by the segment index, without necessarily depending on the sequence number, thereby greatly reducing the processing complexity of the receiving end.

As can be seen from the above description, the SO field is removed from the header, i.e. the header of the PDU does not already have the SO field, but instead has the identification field.

In addition, since the segmentation of RLC SDUs requires reference to scheduling information of the MAC layer (which can be understood as segmentation processing of received data according to a size specified by a MAC entity), the number of segments fluctuates somewhat for each RLC SDU. Based on this situation, the case of a large number of segments may not be satisfied when the number of bits of the identification field is small; when the number of bits in the identification field is large, resources are wasted when the number of segments is small.

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

After receiving the PDU, the second RLC entity may analyze bits indicated by the related indication information in bits occupied by the identification field according to the indication information of the first field, without analyzing all bits, thereby reducing the processing complexity of the RLC receiving end.

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

The conditions (FI length, sequence number length, bit alignment criteria, etc.) of the RLC packet header are comprehensively considered, and the length of the segmented epitome is combined, so that PDUs with different formats can be selected according to needs in practical application.

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

when the number of the segments is larger than or equal to a preset threshold value, determining that the format of the PDU is a second format; in the second format, a first line of the packet header includes: the device comprises an R field, a first field, an FI field and a serial number field; the second row of the packet header comprises a sequence number field; at least one line subsequent to the second line in the packet header includes: a domain is identified.

Wherein, the R field is a reserved bit. The preset threshold may be set as needed, such as 3 bits, etc.

As can be seen from the above description, the first format is suitable for the segment index with shorter length, i.e. for the case of a smaller number of slices, and the second format is suitable for the segment index with longer length, i.e. for the case of a larger number of slices.

For example, as shown in fig. 3, in the header, the first row includes a first field (denoted by S field), an FI field, an identification field (denoted by Segmentation Index field), and a sequence number field (denoted by SN field), and the second row includes a sequence number field.

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 applications, the lengths of the fields 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 fig. 4, in the packet header, the first row includes a reserved field (denoted by R field), a first field (denoted by S field), an FI field, and a sequence number field (denoted by SN field); a second action sequence number field; the third and fourth lines are identification fields (denoted by the Segmentation Index field).

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 practical applications, the lengths of the fields in the packet 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 fig. 3 and 4 is a PDU format under RLC UM (Unacknowledged Mode), and under RLC AM (Acknowledged Mode), the PDU also has other indicator bits such as P field, and the like, in a similar manner.

As can be seen from the above description, the length of the identification field in the second format is greater than that in the first format, so that the case of a large number of segments, for example, 256 segments, can be satisfied.

Step 202: and transmitting the generated PDU to a second RLC entity.

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

As shown in fig. 5, the method includes:

step 501: the second RLC entity receives the PDU from the first RLC entity;

here, the second RLC entity receives RLC SDUs from the corresponding MAC entity in actual use.

Step 502: and performing packet reassembly on the received PDU to obtain an RLC SDU, and sending the RLC SDU.

In the process of recombination, analyzing the PDU to obtain a corresponding segment index; the segmentation index indicates the segmentation sequence of the corresponding segment of the corresponding PDU in the RLC SDU;

And the second RLC entity sorts the received PDUs according to the determined segmentation order and by combining the sequence numbers of the PDUs and performs packet reassembly.

Specifically, the PDUs with the same sequence number are sorted according to the segmentation order and are subjected to packet reassembly.

In an embodiment, for the segment index, an identification field recognizable by the RLC layer may be added to the 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 a corresponding segment index in the identifier field, and the obtained segment index indicates that the segment corresponding to the PDU is the second segment of the RLC SDU.

In addition, the FI and the segmentation index may also be utilized to jointly indicate the position relationship of the segmentation in the RLC SDU. Wherein the information of the FI field indicates a segmentation position of the PDU in the RLC SDU.

Based on the method, when the PDU is analyzed, the second RLC entity analyzes the packet header of the PDU and obtains a corresponding segmentation index in the identification domain;

correspondingly, the second RLC entity performs packet reassembly on the segmentation sequence of the middle segment of the RLC SDU, which is determined by at least the indication information of the FI field in each PDU and the segmentation index and corresponds to the corresponding PDU.

That is, the second RLC can perform packet reassembly by using the indication information of the FI field and the segment index, without depending on the sequence number, thereby greatly reducing the processing complexity of the receiving end.

Of course, if there is a sequence number in the packet header, the sequence number may be further combined to perform packet reassembly, and specifically, the PDUs with the same sequence number are sorted and reassembled according to the indication information and the segment index of the FI field.

When the PDU packet header also carries indication information of a first domain, and the second RLC entity analyzes the packet header, related indication information representing the bit occupied by the segmented index is obtained in the first domain;

correspondingly, the second RLC entity analyzes the bit indicated by the related indication information in the bits occupied by the identification field to obtain the segment index, and analyzes the bit indicated by the related indication information in the bits occupied by the identification field according to the indication information of the first field, without analyzing all the bits, thereby reducing the processing complexity of the RLC receiving end.

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

As can be seen from the above description, 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 carries out segmentation processing on the received RLC SDU and generates a PDU by utilizing each obtained segmentation content;

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

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

step 604: and performing packet reassembly on the received PDU to obtain an RLC SDU, and sending the RLC SDU.

In the process of recombination, analyzing the PDU to obtain a corresponding segment index;

Here, in practical application, the scheme of the embodiment of the present invention may be applied to RLC AM and RLC UM. In these two modes, the corresponding RLC entities are an AM RLC entity and an RLC UM entity, respectively. The first and second RLC entities may be AM RLC entities or UM RLC entities.

The RLC AM is an RLC confirmation mode, in the RLC AM, an RLC receiving end needs to feed back a status report to an RLC sending end, and the RLC sending end retransmits a data packet which is not correctly received by the receiving end according to the status report; RLC UM is a mode of RLC that does not require acknowledgement.

In the data processing method provided by the embodiment of the invention, a first RLC entity carries out segmentation processing on received RLC SDUs and generates a PDU (protocol data Unit) by using each obtained segmentation content; wherein, at least one PDU carries a segment index; the segmentation index indicates the segmentation sequence of the corresponding segment of the corresponding PDU in the RLC SDU; sending the generated PDU to a second RLC entity; the second RLC entity analyzes the PDU to obtain a corresponding segmentation index; the segmentation index is used to indicate the segmentation sequence of the corresponding PDU in the RLC SDU, and the segmentation sequence can be indicated by a small number of bits without using an SO domain, SO that the cost of a packet header is greatly saved on the premise of not changing the packet packing performance of a receiving end and the like.

In order to implement the method according to the embodiment of the present invention, an embodiment of the present invention further provides a data transmission apparatus, which is disposed in the first RLC entity, and as shown in fig. 7, the apparatus includes:

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

a second processing unit 72, configured to send the generated PDU to the second RLC entity.

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

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

when each obtained segmented content is used for generating one PDU, aiming at the PDU carrying a segmented index, an identification domain is added in a packet header, the corresponding segmented index is placed in the identification domain, and an SO domain in the packet header is removed; the information of the SO field indicates a slicing position of the corresponding PDU compared to the RLC SDU.

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

when each PDU is generated by utilizing the obtained segmented content, aiming at each middle segmented PDU, an identification domain is added in a packet header, a corresponding segmented index is placed in the identification domain, and an SO domain in the packet header is removed; the information of the SO domain indicates the segmentation position of the corresponding PDU compared with the RLC SDU; the segmentation index arranged in the identification field indicates the segmentation sequence of the corresponding segment of the corresponding PDU in the middle segment of the RLC SDU; the middle segmentation is the segmentation of all the segments of the RLC SDU except the first segment and the last segment;

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

In practical applications, the first processing unit 71 and the second processing unit 72 can be implemented by a processor in a data transmission device.

In order to implement the method according to the embodiment of the present invention, another data transmission apparatus is further provided in the embodiment of the present invention, and is disposed in a second RLC entity, as shown in fig. 8, where the apparatus includes:

a third processing unit 81 for receiving the PDU from the first RLC entity;

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

in the process of reassembly, the fourth processing unit 82 parses the PDU to obtain a corresponding segment index; and determining the segmentation sequence of the corresponding segment of the PDU in the RLC SDU according to the segmentation index.

Wherein the segmentation index indicates a segmentation order of a segment corresponding to the corresponding PDU in the RLC SDU.

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

when the PDU is analyzed, the header of the PDU is analyzed, and a corresponding segment index is obtained in the identification domain.

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

when the PDU is analyzed, the packet header of the PDU is analyzed, and a corresponding segment index is obtained in the identification domain; determining the segmentation sequence of the corresponding segment of the PDU in the middle segment of the RLC SDU according to the obtained segmentation index; the middle segmentation is the segmentation of all the segments of the RLC SDU except the first segment and the last segment;

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

In practical applications, the third processing unit 81 and the fourth processing unit 82 can be implemented by a processor in a data transmission device.

It should be noted that: in the data transmission device provided in the above embodiment, only the division of the program modules is taken as an example when data is transmitted, and in practical applications, the processing distribution may be completed by different program modules according to needs, that is, 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 provided by the above embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiments and are not described herein again.

Based on the hardware implementation of the program module, an embodiment of the present invention provides a hardware structure of a data transmission apparatus, which is disposed in a first RLC entity, and as shown in fig. 9, the apparatus 90 includes:

a first processor 91 and a first memory 92 for storing computer programs capable of running on the processor, wherein,

the first processor 91 is configured to execute, when running the computer program:

the received RLC SDU is segmented, and each segmented content is utilized to generate a PDU; wherein, at least one PDU carries a segment index; the segmentation index indicates the segmentation sequence of the corresponding segment of the corresponding PDU in the RLC SDU;

and transmitting the generated PDU to a second RLC entity.

In an embodiment, at least each PDU of the middle segment carries a segment index; the middle segmentation is a segmentation of all the segments of the RLC SDU except for a first segmentation and a last segmentation.

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

when each PDU is generated by utilizing the obtained segmented content, aiming at each PDU carrying a segmented index, an identification domain is added in a packet header, the corresponding segmented index is arranged in the identification domain, and an SO domain in the packet header is removed; the information of the SO field indicates a slicing position of the corresponding PDU compared to the RLC SDU.

In an embodiment, the first processor 91 is further configured to, when running the computer program, perform:

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

In practice, of course, the various components of the data transfer device 90 are coupled together by a bus system 93, as shown in FIG. 9. It will be appreciated that the bus system 93 is used to enable communications among the components. The bus system 93 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 93 in fig. 9.

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 apparatus 90.

The method disclosed in the above 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 having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the first processor 91. The first processor 91 may be a general purpose processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The first processor 91 may implement or perform the methods, steps and logic blocks 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 by the embodiment of the invention can be directly implemented by a hardware decoding processor, or can be implemented by combining hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the first memory 92, and the first processor 91 reads the information in the first memory 92 and in combination with its hardware performs the steps of the aforementioned method.

In an exemplary embodiment, the data transmission Device 90 may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, Micro Controllers (MCUs), microprocessors (microprocessors), or other electronic components for performing the aforementioned methods.

To implement the method according to the embodiment of the present invention, an embodiment of the present invention provides a data transmission apparatus, which is disposed in a second RLC entity, and as shown in fig. 10, the apparatus 100 includes:

a second processor 101 and a second memory 102 for storing a computer program operable on the first processor; wherein,

the second processor 101 is configured to, when running the computer program, perform:

receiving a PDU from a first RLC entity;

in the process of recombination, the PDU is analyzed to obtain a corresponding segment index; the segmentation index indicates the segmentation sequence of the corresponding segment of the corresponding PDU in the RLC SDU;

In an embodiment, the second processor 101 is configured to execute, when running the computer program, the following steps:

when the PDU is analyzed, the packet header of the PDU is analyzed, and a corresponding segment index is obtained in the identification domain;

In an embodiment, the second processor 101 is further configured to, when running the computer program, perform:

In practice, of course, as shown in fig. 10, the various components of the data transmission device 100 are coupled together by a bus system 103. It will be appreciated that the bus system 103 is used to enable communications among the components connected. The bus system 103 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 103 in fig. 10.

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 apparatus 100.

The method disclosed in the above 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 having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the second processor 101. The second processor 101 described above may be a general purpose processor, a DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The second processor 101 may implement or perform the methods, steps and logic blocks 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 by the embodiment of the invention can be directly implemented by a hardware decoding processor, or can be implemented by combining hardware and software modules in the decoding processor. The software module may be located in a storage medium located in the second memory 102, and the second processor 101 reads the information in the second memory 102, and in combination with its hardware, performs the steps of the foregoing method.

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 (microprocessors), or other electronic components for performing the aforementioned methods.

It is understood that the memories (such as the first memory 92 and the second memory 102) in the embodiments of the present invention may be volatile memories or nonvolatile memories, and may include both volatile and nonvolatile memories. Among them, the nonvolatile Memory may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an erasable Programmable Read-Only Memory (EPROM), an electrically erasable Programmable Read-Only Memory (EEPROM), a magnetic random access Memory (FRAM), a ferromagnetic access Memory (Flash Memory), a magnetic surface Memory, an optical Disc, or a Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data rate Synchronous Dynamic Random Access Memory (DDRSDRAM, Double Data rate Synchronous Dynamic Random Access Memory), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), Synchronous link Dynamic Random Access Memory (SLDRAM, Synchronous Dynamic Random Access Memory (DRAM), Direct Memory (DRM, Random Access Memory). The described memory for embodiments of the present invention is intended to comprise, without being limited to, these and any other suitable types of memory.

In an exemplary embodiment, the present invention further provides a computer readable storage medium, for example, including a first memory 92 storing a computer program, which is executable by a first processor 91 of the data transmission device 90 to perform the steps of the aforementioned method. Alternatively, the computer readable storage medium comprises a second memory 102 storing a computer program executable by the second processor 101 of the data transmission device 100 to perform the steps of the aforementioned method.

That is, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, where the computer program is executed by a processor to implement the steps of the first RLC entity side method or the steps of the second RLC entity side method.

It should be noted that: the computer-readable storage medium provided by the embodiment of the invention can be memories such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface Memory, optical disk, or CD-ROM; or may be various devices including one or any combination of the above memories.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A method of data transmission, the method comprising:

the first radio link control RLC entity carries out segmentation processing on the received RLC service data unit SDU and generates a protocol data unit PDU by utilizing each obtained segmentation content; wherein, at least one PDU carries a segment index; the segment index indicates a segmentation order of a segment corresponding to the corresponding PDU in the RLC SDU;

and transmitting the generated PDU to a second RLC entity.

2. The method of claim 1, wherein at least each intermediate segment's PDU carries a segment index; the middle segmentation is a segmentation of all the segments of the RLC SDU except for a first segmentation and a last segmentation.

3. The method of claim 1, wherein when generating a PDU using the contents of each segment obtained, the method comprises:

aiming at the PDU carrying the segment index, adding an identification field in a packet header, placing the corresponding segment index in the identification field, and removing a slice compensation SO field in the packet header; the information of the SO field indicates a slicing position of the corresponding PDU compared to the RLC SDU.

4. The method of claim 1, wherein when generating a PDU using the contents of each segment obtained, the method comprises:

5. The method according to claim 3 or 4, characterized in that the method further comprises:

6. The method of claim 5, further comprising:

7. The method of any 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 method of data transmission, the method comprising:

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

9. The method of claim 8, wherein parsing the PDU comprises:

10. The method of claim 8, wherein parsing the PDU comprises:

11. The method according to claim 9 or 10, characterized in that the method further comprises:

12. The method according to any 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 apparatus, configured to be disposed in a first RLC entity, the apparatus comprising:

the first processing unit is used for carrying out segmentation processing on the received RLC SDU and generating a protocol data unit PDU by utilizing each obtained segmentation content; wherein, at least one PDU carries a segment index; the segmentation index indicates the segmentation sequence of the corresponding segment of the corresponding PDU in the RLC SDU;

14. A data transmission apparatus, disposed in a second RLC entity, the apparatus comprising:

a third processing unit for receiving the PDU from the first RLC entity;

15. A data transmission apparatus, configured in a first RLC entity, comprising: a first processor and a first memory for storing a computer program capable of running on the processor,

wherein the first processor is configured to execute, when running the computer program:

and transmitting the generated PDU to a second RLC entity.

16. The apparatus of claim 15, wherein the PDU of at least each middle segment carries a segment index; the middle segmentation is a segmentation of all the segments of the RLC SDU except for a first segmentation and a last segmentation.

17. The apparatus of claim 15, wherein the first processor, when executing the computer program, is configured to perform:

18. The apparatus of claim 15, wherein the first processor, when executing the computer program, is configured to perform:

when each PDU is generated by utilizing the obtained segmented content, aiming at each middle segmented PDU, an identification domain is added in a packet header, a corresponding segmented index is placed in the identification domain, and an SO domain in the packet header is removed; the information of the SO domain indicates the segmentation position of the corresponding PDU compared with the RLC SDU; the segmentation index arranged in the identification field indicates the segmentation sequence of the corresponding segment of the corresponding PDU in the middle segment of the RLC SDU;

19. The apparatus according to claim 17 or 18, wherein the first processor is further configured to execute, when running the computer program:

20. The apparatus of claim 19, wherein the first processor is further configured to, when executing the computer program, perform:

21. The apparatus of any of claims 15 to 18, wherein the first RLC entity and the second RLC entity are AM RLC entities or UM RLC entities.

22. A data transmission apparatus, configured in a second RLC entity, comprising: a second processor and a second memory for storing a computer program capable of running on the processor,

wherein the second processor is configured to execute, when running the computer program:

receiving a PDU from a first RLC entity;

23. The apparatus according to claim 22, wherein the second processor, when executing the computer program, is configured to perform:

24. The apparatus according to claim 22, wherein the second processor, when executing the computer program, is configured to perform:

25. The apparatus according to claim 23 or 24, wherein the second processor is further configured to execute, when running the computer program:

26. The apparatus of any 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, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7 or carries out the steps of the method of any one of claims 8 to 12.