CN111435930B - Control PDU (protocol data Unit) sending method and device, electronic equipment and storage medium - Google Patents

Control PDU (protocol data Unit) sending method and device, electronic equipment and storage medium Download PDF

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Publication number
CN111435930B
CN111435930B CN201910028266.XA CN201910028266A CN111435930B CN 111435930 B CN111435930 B CN 111435930B CN 201910028266 A CN201910028266 A CN 201910028266A CN 111435930 B CN111435930 B CN 111435930B
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pdu
pdcp pdu
sdap
mode
pdcp
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CN111435930A (en
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孙军帅
王莹莹
黄学艳
韩星宇
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]

Abstract

The invention discloses a control PDU sending method, a control PDU sending device, electronic equipment and a storage medium, which are used for solving the problem of low reliability of the control PDU sending method in the prior art. The method comprises the following steps: when a data packet containing at least one SDAP End-Marker control PDU sent by a service discovery application protocol layer SDAP is received, a first packet data convergence protocol layer PDCP PDU containing the at least one SDAP End-Marker control PDU is established; transmitting the first PDCP PDU.

Description

Control PDU (protocol data Unit) sending method and device, electronic equipment and storage medium
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for controlling PDU sending, an electronic device, and a storage medium.
Background
In the prior art, when sending a control PDU, a format of a PDCP PDU as shown in fig. 1 is mostly used, where the PDCP PDU only includes a D/C field of a PDCP header and a QFI field used for indicating identification information of a data packet containing the control PDU to be sent.
In the PDCP PDU format shown in fig. 2, the SDU part of the PDCP carries the status report of the PDCP, and the PDU is controlled by polling the PDCP status report.
The PDCP PDU format shown in fig. 3 carries a distributed ROHC feedback, and this format is suitable for the UM mode and the AM mode, but the UM mode cannot ensure the reliability of the transmission of the control PDU, so this scheme still has the problem of low reliability of the transmission of the control PDU.
Disclosure of Invention
The embodiment of the invention provides a control PDU sending method, a device, electronic equipment and a storage medium, which are used for solving the problem of low reliability of the control PDU sending method in the prior art.
The embodiment of the invention provides a method for controlling a PDU (protocol data Unit), which comprises the following steps:
when a data packet containing at least one SDAP End-Marker control protocol data unit PDU sent by a service discovery application protocol layer SDAP is received, a first packet data convergence protocol layer PDCP PDU containing the at least one SDAP End-Marker control PDU is established;
transmitting the first PDCP PDU.
Further, the PDCP header of the first PDCP PDU includes an RB _ Switch Flag field identifying whether the mode of the RB is switched.
Further, if the RB _ Switch Flag field identifies that the RB mode is switched, the SDU of the first PDCP PDU includes identification information of the RB before the RB mode switching of the RB that sends each SDAP End-Marker control PDU of the first PDCP PDU.
Further, if the RB _ Switch Flag field indicates that the RB mode is not switched, the SDU of the first PDCP PDU may include the identification information of the RB or may not include the identification information of the RB.
Further, if the End-Marker NI field identifies that the Number of SDAP End-Marker control PDUs contained in the first PDCP PDU exists, the SDU of the first PDCP PDU further contains:
a Number of SDAP End-Marker field identifying a Number of SDAP End-Marker control PDUs contained in the first PDCP PDU.
Further, the transmitting the first PDCP PDU includes:
judging whether the mode of the RB for sending the data packet by the SDAP is an unconfirmed UM mode;
if yes, converting the first PDCP PDU to an RB confirming an AM mode for transmission;
and if not, directly adopting the RB confirming the AM mode to send the first PDCP PDU.
The embodiment of the invention provides a device for controlling PDU transmission, which comprises:
the system comprises a building module, a sending module and a receiving module, wherein the building module is used for building a first packet data convergence protocol layer PDCP PDU containing at least one SDAP End-Marker control protocol data unit PDU when receiving a data packet containing the at least one SDAP End-Marker control protocol data unit PDU sent by a service discovery application protocol layer SDAP;
a sending module, configured to send the first PDCP PDU.
The embodiment of the invention provides electronic equipment, which comprises a memory and a processor;
the processor is used for reading the program in the memory and executing the following processes: when a data packet containing at least one SDAP End-Marker control PDU sent by a service discovery application protocol layer SDAP is received, a first packet data convergence protocol layer PDCP PDU containing the at least one SDAP End-Marker control PDU is established; transmitting the first PDCP PDU.
Further, the processor is configured to determine whether a mode of an RB in which the SDAP transmits the data packet is an unacknowledged UM mode; if yes, the first PDCP PDU is converted to an RB confirming an AM mode for transmission; and if not, directly adopting the RB of the confirmed AM mode to send the first PDCP PDU.
An embodiment of the present invention provides an electronic device, including: the system comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;
the memory has stored therein a computer program which, when executed by the processor, causes the processor to perform the steps of any of the methods described above.
An embodiment of the present invention provides a computer-readable storage medium, which stores a computer program executable by an electronic device, and when the program runs on the electronic device, the computer program causes the electronic device to perform the steps of any one of the methods described above.
The embodiment of the invention provides a control PDU sending method, a control PDU sending device, electronic equipment and a storage medium, wherein the method comprises the following steps: when a data packet containing at least one SDAP End-Marker control PDU sent by an SDAP is received, a first packet data convergence protocol layer PDCP PDU containing the at least one SDAP End-Marker control PDU is established; transmitting the first PDCP PDU. By designing a new PDCP PDU type in the PDCP protocol sublayer, namely controlling the transmission of the PDU through the SDAP End-Marker, the high reliability of the transmission of the control PDU is ensured by the new PDU type.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a PDCP PDU containing a QFI field according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a PDCP PDU containing a status report of a PDCP according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a PDCP PDU with distributed ROHC feedback according to an embodiment of the present invention;
fig. 4 is a schematic process diagram for controlling a PDU sending method according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a novel PDCP PDU according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a novel PDCP PDU according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a control PDU sending apparatus according to an embodiment of the present invention;
fig. 8 is an electronic device according to an embodiment of the present invention;
fig. 9 is an electronic device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the attached drawings, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
fig. 4 is a schematic process diagram of a method for controlling a PDU sending method according to an embodiment of the present invention, where the process includes the following steps:
s401: when a data packet containing at least one SDAP End-Marker control protocol data unit PDU sent by an SDAP is received, a first packet data convergence protocol layer PDCP PDU containing the at least one SDAP End-Marker control PDU is constructed.
In order to further ensure high reliability of control PDU transmission, in the embodiment of the present invention, the new PDCP PDU type is newly designed in the PDCP protocol sublayer.
When a sending End of the PDCP layer receives a data packet which is sent by the SDAP layer and contains the SDAP End-Marker control PDU, a first PDCP PDU corresponding to the SDAP End-Marker control PDU is established according to a pre-designed new PDCP PDU format. Specifically, if a plurality of SDAP End-Marker control PDUs are received, a first PDCP PDU containing each SDAP End-Marker control PDU is established; if only one SDAP End-Marker control PDU is received, a first PDCP PDU containing the SDAP End-Marker control PDU is constructed.
Specifically, according to a pre-designed format of a new PDCP PDU, a first PDCP PDU including at least one SDAP End-Marker control PDU is constructed to include a PDCP header and an SDU, and the at least one SDAP End-Marker control PDU is included in the SDU of the first PDCP PDU.
S402: transmitting the first PDCP PDU.
And after the sending end of the PDCP layer successfully constructs a first PDCP PDU according to the format of a new PDCP PDU which is designed in advance, the sending end of the PDCP layer sends the first PDCP PDU to the receiving end of the PDCP layer.
In the embodiment of the invention, a new PDCP PDU type is designed in a PDCP protocol sublayer, namely the sending of the PDU is controlled by an SDAP End-Marker, and the high reliability of the sending of the PDU is ensured by the new PDU type.
Example 2:
to further ensure high reliability of control PDU transmission, on the basis of the above embodiments, in an embodiment of the present invention, a PDCP header of the first PDCP PDU includes an End-Marker NI field, where the End-Marker NI field identifies whether a Number of SDAP End-Marker control PDUs included in the first PDCP PDU exists.
The PDCP header of the first PDCP PDU includes a D/C field identifying whether the PDCP PDU is a control PDU or a data PDU and a PDU type field identifying a type of the control PDU. The Number of SDAP End-Marker field is assigned with a value that can be understood as how many SDAP End-Marker control PDUs are contained in the first PDCP PDU, for example, if the End-Marker NI field contains information of "1", the Number of SDAP End-Marker fields exists, that is, the Number of SDAP End-Marker control PDUs contained in the first PDCP PDU is plural, and if the End-Marker NI field contains information of "0", the Number of SDAP End-Marker fields does not exist, that is, the Number of SDAP End-Marker control PDUs contained in the first PDCP PDU is one.
And if it is determined through the End-Marker NI field that the Number of the SDAP End-Marker control PDUs included in the first PDCP PDU is not 1, in order to more clearly determine the Number of the SDAP End-Marker control PDUs included in the first PDCP PDU, the SDU of the first PDCP PDU further includes a Number of SDAP End-Marker field identifying the specific Number of the SDAP End-Marker control PDUs included in the first PDCP PDU.
In the embodiment of the invention, the reliability of sending the PDCP control PDU is improved by adding the RB _ ID field and the End-Marker NI field in the PDCP header of the PDCP PDU.
Example 3:
in order to further improve the reliability of the transmission of the first PDCP PDU, on the basis of the foregoing embodiments, in the embodiment of the present invention, the PDCP header of the first PDCP PDU further includes an RB _ Switch Flag field for identifying whether the mode of the RB is switched.
In order to ensure that the first PDCP PDUs are all more reliable, the constructed first PDCP PDUs are sent on an RB in an AM mode, and if an SDAP End-Marker control PDU received by the PDCP layer is sent in an UM mode, the mode corresponding to the RB needs to be converted, therefore in the embodiment of the present invention, the header of the first PDCP PDU further includes an RB _ Switch Flag field, where the RB _ Switch Flag field is used to identify whether the mode of the RB is converted, for example, the mode of the RB can be identified by "1" and the mode of the RB is identified by "0" without conversion.
In this embodiment of the present invention, if the RB _ Switch Flag field identifies that the RB mode is switched, the SDU of the first PDCP PDU includes an RB _ ID field of the identification information of the RB.
If the RB _ Switch Flag field indicates that the RB mode has been switched, in order to identify the existence of the Switch in the PDCP PDU, the SDU of the first PDCP PDU needs to carry the RB _ ID before the Switch, that is, the RB _ ID used when the SDAP layer sends the SDAP End-Marker control PDU, in which the Switch occurs, of each RB mode to the PDCP layer.
Of course, if the RB _ Switch Flag field indicates that no Switch has occurred in the RB mode, the SDU of the first PDCP PDU may or may not carry the RB _ ID before Switch.
In the embodiment of the invention, the RB _ Switch Flag field and the RB _ ID field for identifying the identification information of the RB before the mode conversion of the RB are added into the conventional PDCP PDU, so that the transmission reliability of the first PDCP PDU is further improved.
Example 4:
in order to ensure the reliability of the transmission of the first PDCP PDU, on the basis of the foregoing embodiments, in an embodiment of the present invention, the sending the first PDCP PDU includes:
judging whether the mode of the RB for sending the data packet by the SDAP is an unconfirmed UM mode;
if yes, the first PDCP PDU is converted to an RB confirming an AM mode for transmission;
if not, directly adopting the RB of the confirmed AM mode to send the first PDCP PDU.
In order to solve the problem that the UM mode cannot ensure reliable transmission of the SDAP End-Marker control PDU, in the embodiment of the present invention, when a sending End of the PDCP layer sends a first PDCP PDU to a receiving End, it is first determined whether a mode corresponding to an RB adopted when the SDAP layer sends a data packet including the SDAP End-Marker control PDU is the UM mode.
If the RB mode used when the SDAP sends the data packet is the UM mode, since the default forwarding rule of the PDCP layer is the mode corresponding to the same RB as that used when the SDAP layer sends the data packet, that is, the UM mode, in order to ensure reliable transmission of the first PDCP PDU, the first PDCP PDU is converted to the RB in the AM mode for sending, and at this time, the sending end of the PDCP layer may randomly select one of the RBs in the available AM mode, such as SRB and DRB.
If the RB mode used when the SDAP transmits the packet is not the UM mode, the second PDCP PDU may be transmitted by directly using the RB in the AM mode without performing the conversion step.
In the embodiment of the invention, whether the RB mode adopted when the SDAP sends the data packet containing the SDAP End-Marker control PDU is the UM mode is judged, and the first PDCP PDU is converted to the RB of the AM mode to be sent under the condition that the RB mode adopted when the SDAP sends the data packet is the UM mode, so that the reliable transmission of the first PDCP PDU is ensured.
The following describes each of the above embodiments in detail with a specific embodiment, including the following steps:
step 1: and receiving a data packet which contains at least one SDAP End-Marker control PDU and is sent by the SDAP, and establishing a first PDCP PDU which contains at least one SDAP End-Marker control PDU.
After a sending end of the PDCP layer receives a data packet sent by the SDAP, in order to further improve the reliability of PDU transmission control, a first PDCP PDU is established according to a pre-designed new PDCP PDU format.
Specifically, the first PDCP PDU may be constructed using the construction format of the first PDCP PDU as shown in fig. 5. As can be seen from fig. 5, the PDCP header of the first PDCP PDU includes an End-Marker NI field identifying whether the number of SDAP End-Marker control PDUs included in the first PDCP PDU is 1, in addition to the D/C field and the PDU type field; the SDU of the first PDCP PDU includes a Number of SDAP End-Marker identifying the Number of SDAP End-Marker control PDUs contained in the first PDCP PDU, at least one SDAP End-Marker control PDU, and an RB _ ID field identifying identification information of an RB corresponding to the SDAP End-Marker control PDU.
Specifically, the SDAP End-Marker control PDU and the RB _ ID field of the identification information identifying the RB corresponding to the SDAP End-Marker control PDU may follow the rule shown in fig. 5 when they are assembled, for example, the first SDAP End-Marker control PDU is identified as 0# SDAP End-Marker control PDU when they are assembled, and the identification information of the RB corresponding to the first SDAP End-Marker control PDU may be identified as 0# RB _ ID, taking this as an example, the identification information of each SDAP End-Marker control PDU and the RB corresponding to the SDAP End-Marker control PDU may be assembled in a one-to-one correspondence manner, such as the 1# SDAP End-Marker control PDU and the 1# RB _ ID, the 2# SDAP End-Marker control PDU and the 2# RB _ ID.
In addition, if it is identified that the Number of SDAP End-Marker control PDUs included in the first PDCP PDU is 1, the Number of SDAP End-Marker may not exist.
In addition, the first PDCP PDU may be constructed by using a construction format of the first PDCP PDU as shown in fig. 6, in which the PDCP header of the first PDCP PDU further includes an RB _ Switch Flag field for identifying whether the RB mode is converted, and if the RB _ Switch Flag field identifies that the RB mode is converted, the SDU of the new PDCP PDU further includes an RB _ ID field for identifying the identification information of the RB before the RB mode is converted.
And 2, step: transmitting the first PDCP PDU.
In order to ensure the reliability of the transmission of the first PDCP PDU, before the first PDCP PDU is sent, whether the mode of an RB for sending a data packet by the SDAP is a non-confirmed UM mode is judged;
if yes, the first PDCP PDU is converted to the RB of the AM mode for transmission;
and if not, directly transmitting the first PDCP PDU on the RB adopting the AM mode.
The specific processes of the above steps are described in the above embodiments, and are not described in detail in the embodiments of the present invention.
Example 5:
based on the same technical concept, the embodiment of the invention provides a control PDU transmitting device. As shown in fig. 7, the apparatus provided in the embodiment of the present invention includes:
a creating module 701, configured to create a first packet data convergence protocol layer PDCP PDU including at least one SDAP End-Marker control protocol data unit PDU when receiving a data packet including the at least one SDAP End-Marker control protocol data unit PDU sent by a service discovery application protocol layer SDAP;
a sending module 702, configured to send the first PDCP PDU.
Further, the sending module 702 is specifically configured to determine whether a mode of an RB used by the SDAP to send the data packet is an unacknowledged UM mode; if yes, the first PDCP PDU is converted to an RB confirming an AM mode for transmission; and if not, directly adopting the RB confirming the AM mode to send the first PDCP PDU.
Example 6:
on the basis of the above embodiments, the embodiment of the present invention further provides an electronic device 800, as shown in fig. 8, including a memory 801 and a processor 802;
the processor 802 is configured to read the program in the memory 801 and execute the following processes:
when a data packet containing at least one SDAP End-Marker control protocol data unit PDU sent by a service discovery application protocol layer SDAP is received, a first packet data convergence protocol layer PDCP PDU containing the at least one SDAP End-Marker control PDU is established;
transmitting the first PDCP PDU.
In FIG. 8, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 802 and various circuits of memory represented by memory 801 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein.
Alternatively, the processor 802 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device).
The processor is configured to determine whether a mode of an RB in which the SDAP sends the data packet is an unacknowledged UM mode; if yes, the first PDCP PDU is converted to an RB confirming an AM mode for transmission; and if not, directly adopting the RB of the confirmed AM mode to send the first PDCP PDU.
Example 7:
on the basis of the foregoing embodiments, an embodiment of the present invention further provides an electronic device 900, as shown in fig. 9, including: the system comprises a processor 901, a communication interface 902, a memory 903 and a communication bus 904, wherein the processor 901, the communication interface 902 and the memory 903 are communicated with each other through the communication bus 904;
the memory 903 has stored therein a computer program which, when executed by the processor 901, causes the processor 901 to perform the steps of:
when a data packet containing at least one SDAP End-Marker control PDU sent by a service discovery application protocol layer SDAP is received, a first packet data convergence protocol layer PDCP PDU containing the at least one SDAP End-Marker control PDU is established;
transmitting the first PDCP PDU.
Further, the processor is configured to determine whether a mode of an RB in which the SDAP transmits the data packet is an unacknowledged UM mode; if yes, the first PDCP PDU is converted to an RB confirming an AM mode for transmission; and if not, directly adopting the RB of the confirmed AM mode to send the first PDCP PDU.
The communication bus mentioned in the electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface 902 is used for communication between the electronic device and other devices.
The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Alternatively, the memory may be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a central processing unit, a Network Processor (NP), and the like; but may also be a Digital instruction processor (DSP), an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like.
Example 8:
on the basis of the foregoing embodiments, an embodiment of the present invention further provides a computer-readable storage medium, in which a computer program executable by an electronic device is stored, and when the program is run on the electronic device, the electronic device is caused to execute the following steps:
the memory having stored therein a computer program that, when executed by the processor, causes the processor to perform the steps of:
when a data packet containing at least one SDAP End-Marker control PDU sent by a service discovery application protocol layer SDAP is received, a first packet data convergence protocol layer PDCP PDU containing the at least one SDAP End-Marker control PDU is established;
transmitting the first PDCP PDU.
Further, the processor is configured to determine whether a mode of an RB in which the SDAP transmits the data packet is an unacknowledged UM mode; if yes, the first PDCP PDU is converted to an RB confirming an AM mode for transmission; and if not, directly adopting the RB of the confirmed AM mode to send the first PDCP PDU.
The computer readable storage medium may be any available medium or data storage device that can be accessed by a processor in an electronic device, including but not limited to magnetic memory such as floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc., optical memory such as CDs, DVDs, BDs, HVDs, etc., and semiconductor memory such as ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs), etc.
For the system/apparatus embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference may be made to some descriptions of the method embodiments for relevant points.
It is to be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or operation from another entity or operation without necessarily requiring or implying any actual such relationship or order between such entities or operations.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely application embodiment, or an embodiment combining application and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (11)

1. A method for transmitting control PDU, the method comprising:
when a data packet containing at least one SDAP End-Marker control protocol data unit PDU sent by a service discovery application protocol layer SDAP is received, a first packet data convergence protocol layer PDCP PDU containing the at least one SDAP End-Marker control PDU is established;
a PDCP header of the first PDCP PDU includes an RB _ Switch Flag field that identifies whether a mode of an RB is switched;
transmitting the first PDCP PDU.
2. The method as claimed in claim 1, wherein if the RB _ Switch Flag field identifies that the mode of the RB is transited, the SDU of the first PDCP PDU includes identification information of an RB before mode transition of the RB from which each SDAP End-Marker control PDU is transmitted.
3. The method of claim 1, wherein if the RB _ Switch Flag field identifies that the RB mode is not transited, the SDU of the first PDCP PDU includes identification information of the RB or does not include identification information of the RB.
4. The method of claim 1, wherein the PDCP header of the first PDCP PDU includes an End-Marker NI field that identifies whether a Number of SDAP End-Marker control PDUs included in the first PDCP PDU is present.
5. The method of claim 4, wherein if a Number of SDAP End-Marker field for identifying the Number of SDAP End-Marker control PDUs contained in the first PDCP PDU is present, the SDUs of the first PDCP PDU further comprise:
a Number of SDAP End-Marker field identifying a Number of SDAP End-Marker control PDUs contained in the first PDCP PDU.
6. The method of claim 1, wherein the transmitting the first PDCP PDU comprises:
judging whether the mode of the RB for sending the data packet by the SDAP is an unconfirmed UM mode;
if yes, the first PDCP PDU is converted to an RB confirming an AM mode for transmission;
and if not, directly adopting the RB confirming the AM mode to send the first PDCP PDU.
7. An apparatus for controlling transmission of PDUs, the apparatus comprising:
the service discovery application protocol layer SDAP comprises a building module, a sending module and a receiving module, wherein the building module is used for building a first packet data convergence protocol layer PDCP PDU containing at least one SDAP End-Marker control protocol data unit PDU when receiving a data packet containing the at least one SDAP End-Marker control protocol data unit PDU sent by a service discovery application protocol layer SDAP;
the PDCP header of the first PDCP PDU includes an RB _ Switch Flag field identifying whether the mode of the RB is switched;
a sending module, configured to send the first PDCP PDU.
8. An electronic device, comprising a memory and a processor;
the processor is used for reading the program in the memory and executing the following processes: when a data packet containing at least one SDAP End-Marker control PDU sent by a service discovery application protocol layer SDAP is received, a first packet data convergence protocol layer PDCP PDU containing the at least one SDAP End-Marker control PDU is established; the PDCP header of the first PDCP PDU includes an RB _ Switch Flag field identifying whether the mode of the RB is switched; transmitting the first PDCP PDU.
9. The electronic device of claim 8, wherein the processor is configured to determine whether a mode of the RB used by the SDAP to transmit the packet is an unacknowledged UM mode; if yes, the first PDCP PDU is converted to an RB confirming an AM mode for transmission; and if not, directly adopting the RB of the confirmed AM mode to send the first PDCP PDU.
10. An electronic device, comprising: the system comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;
the memory has stored therein a computer program which, when executed by the processor, causes the processor to carry out the steps of the method of any one of claims 1-6.
11. A computer-readable storage medium, characterized in that it stores a computer program executable by an electronic device, which program, when run on the electronic device, causes the electronic device to carry out the steps of the method of any one of claims 1 to 6.
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