CN110831060A

CN110831060A - Method and equipment for carrying MAC CE of data packet

Info

Publication number: CN110831060A
Application number: CN201810912071.7A
Authority: CN
Inventors: 孙军帅; 王莹莹; 黄学艳; 韩星宇; 刘玉真
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2020-02-21
Anticipated expiration: 2038-08-10
Also published as: CN110831060B

Abstract

The embodiment of the invention discloses a method and equipment for bearing MAC CE of a data packet, which are used for solving the problems of long time delay and high system overhead in the data transmission process. When the embodiment of the invention transmits data, firstly, an SDAP protocol sub-layer in a sending device sends a data packet to be sent to an MAC protocol sub-layer in the sending device; then, the MAC protocol sub-layer in the sending equipment builds MAC CE according to the received data packet and builds MAC PDU according to the MAC CE; and finally, the MAC protocol sub-layer in the sending equipment sends the MAC PDU through an air interface. The method constructs the MAC CE according to the received data packet through the MAC protocol sublayer in the sending equipment, so that the MAC CE bears the data packet, thereby realizing the sending of the data packet on a control channel, better saving system resources and reducing time delay and system overhead.

Description

Method and equipment for carrying MAC CE of data packet

Technical Field

The present invention relates to the field of wireless technologies, and in particular, to a method and an apparatus for loading an MAC CE of a data packet.

Background

Data transmission refers to the process of transferring data between a data source and a data sink over one or more links in accordance with an appropriate procedure. But also the operation of sending data from one place to another by means of signals on the channel. With the introduction of the 5G concept, the requirement for data transmission is higher and higher at present. The traditional network design is mainly designed to meet the requirements of broadband mobile internet, that is, to provide internet experience with high bandwidth and high corresponding speed for users. However, compared with the conventional network, the 5G has a larger number of terminals and a higher energy saving requirement for the terminals, and mainly uses packet transceiving, and particularly needs to reduce time delay and system overhead for burst packet services such as URLLC (Ultra high reliable low latency Communication) and mtc (massive machine type Communication).

However, the conventional transmission mode can only realize sending the short message data packet on the control channel in the core network layer, and the function is not realized in the access network at present. Meanwhile, the traditional data transmission mode is not suitable for the transmission mode of the packet service, if the traditional data transmission mode is used for transmitting the packet service, the overhead of network signaling is far larger than the size of data load transmission, and even some packet services can not be transmitted. Therefore, when faced with the burst packet service of URRL, mtc, the time delay is often long, and the overhead is large.

In summary, the current data transmission process has a long time delay and a high system overhead.

Disclosure of Invention

Embodiments of the present invention provide a method and a device for a MAC CE (media access Control Element) for carrying a data packet, so as to solve the problems of long time delay and high system overhead in a data transmission process.

In a first aspect, a method for a MAC CE carrying a data packet provided in an embodiment of the present invention includes:

firstly, an SDAP (Simple DFS Access Protocol) layer in a sending device sends a data packet to be sent to an MAC (Medium Access Control) sublayer in the sending device; then, the MAC Protocol sublayer in the sending device constructs an MAC CE according to the received Data packet, and constructs a MAC PDU (Medium Access Control Protocol Data Unit, media Access Control Protocol Data Unit) according to the MAC CE; and finally, the MAC protocol sub-layer in the sending equipment sends the MAC PDU through an air interface.

According to the method, the MAC protocol sublayer in the sending equipment constructs the MAC CE according to the received data packet, so that the MAC CE bears the data packet, the data packet is sent on the control channel, and the data packet bearing and channel establishing time delay can be saved by sending the data packet on the control channel, therefore, the method can better save system resources, and reduce time delay and system overhead.

In a possible implementation manner, the SDAP protocol sub-layer in the sending device transparently transmits a data packet to be sent to the MAC protocol sub-layer in the sending device; or the SDAP protocol sub-layer in the sending device directly sends the data packet to be sent to the MAC protocol sub-layer in the sending device.

The method adopts two methods of the transparent transmission mode and the direct connection mode, so that the SDAP protocol sub-layer sends the data to be sent to the MAC protocol sub-layer, the optimal method can be selected according to the actual situation, the method is more convenient and flexible, and meanwhile, the time delay and the system overhead are better reduced due to the adoption of the two methods.

In a possible implementation manner, the SDAP protocol sublayer in the sending device sends a data packet to be sent to the packet data convergence protocol PDCP protocol sublayer in the sending device; the PDCP protocol sublayer in the sending equipment directly sends the received PDCP SDU to the RLC protocol sublayer in a PDCP PDU mode; and the RLC protocol sublayer in the sending equipment directly sends the received RLC SDU to the MAC protocol sublayer in an RLC PDU form.

In the method, in the process that the PDCP protocol sublayer in the sending device passes the data packet through the DRB in the PDCP protocol sublayer to the RLC protocol sublayer in the sending device, and the RLC protocol sublayer in the sending device passes the data packet through the MAC protocol sublayer in the sending device, since the pass-through mode is adopted, the data packet does not need to be processed in the PDCP protocol sublayer in the sending device, and meanwhile, when the PDCP protocol sublayer in the sending device establishes the DRB, the related parameters do not need to be calculated, and a default blank value is directly adopted, thereby better reducing the time delay and the system overhead.

In one possible implementation, the MAC protocol sublayer in the transmitting device places index information for indicating transmission data in a subheader (sub-header file) of the MAC PDU.

In the method, the MAC protocol sublayer places the index information for representing the transmission data in the subheader of the MAC PDU, and can find the corresponding data packet by judging the index information representing the transmission data in the subheader in the data receiving process.

In a possible implementation manner, if the MAC PDU is of a non-fixed length, the MAC protocol sublayer in the sending device adds information indicating that the MAC PDU is of a non-fixed length to a subheader of the MAC PDU.

According to the method, the MAC PDU is divided into two lengths, wherein one length is a fixed length, the other length is a non-fixed length, the applicability is stronger, and the indication information is added in the subheader of the MAC PDU and used for indicating the MAC PDU is the non-fixed length, so that the fixed length and the non-fixed length can be better distinguished.

In a second aspect, a method for a MAC CE carrying a data packet according to an embodiment of the present invention includes:

firstly, an MAC protocol sublayer in receiving equipment receives an MAC PDU through an air interface; then, after determining that the MAC CE in the MAC PDU carries a data packet, the MAC protocol sublayer in the receiving equipment sends the data packet to the SDAP protocol sublayer in the receiving equipment; and finally, the SDAP protocol sub-layer in the receiving equipment processes the received data packet and sends the processed data packet to an upper layer.

According to the method, the MAC protocol sublayer in the sending equipment constructs the MAC CE according to the received data packet, so that the MAC CE bears the data packet, the data packet is sent on the control channel, the bearing of the data packet is better saved, and the time delay and the system overhead are reduced.

In a possible implementation manner, the receiving device determines whether index information for indicating transmission data exists in a subheader of the MAC PDU; and if so, determining that the MAC CE carries the data packet, otherwise, determining that the MAC CE does not carry the data packet.

In a possible implementation manner, the MAC protocol sublayer in the receiving device transparently transmits a data packet to be sent to the SDAP protocol sublayer in the receiving device; or the MAC protocol sub-layer in the receiving device directly sends the data packet to be sent to the SDAP protocol sub-layer in the receiving device.

In a possible implementation manner, a MAC protocol sublayer in the receiving device sends a data packet to be sent to an RLC protocol sublayer in the receiving device; the RLC protocol sublayer in the receiving equipment directly sends the received data packet to the PDCP protocol sublayer in the sending equipment; and the PDCP protocol sublayer in the sending equipment directly sends the received data packet to the SDAP protocol sublayer in the sending equipment.

In the above method, the RLC protocol sublayer in the receiving device passes the data packet through to the PDCP protocol sublayer in the sending device; in the process of transmitting the data packet to the SDAP protocol sublayer in the sending device, because the transparent transmission mode is adopted, the data packet does not need to be processed in the PDCP protocol sublayer in the receiving device, and meanwhile, when the DRB is established in the PDCP protocol sublayer in the receiving device, the related parameters do not need to be calculated, and a default blank value is directly adopted, thereby better reducing the time delay and the system overhead.

In a third aspect, an embodiment of the present invention provides a terminal of an MAC CE for carrying a data packet, including: a processor and a transceiver:

the processor is used for sending the data packet to be sent to the MAC protocol sublayer in the sending equipment by the SDAP protocol sublayer in the sending equipment; the MAC protocol sub-layer in the sending equipment builds MAC CE according to the received data packet and builds MAC PDU according to the MAC CE; and the MAC protocol sub-layer in the sending equipment sends the MAC PDU through an air interface.

In a fourth aspect, an embodiment of the present invention provides a terminal of an MAC CE for carrying a data packet, including: a processor and a transceiver:

the processor is used for receiving the MAC protocol sub-layer in the equipment and receiving the MAC PDU through an air interface; after determining that the MAC CE in the MAC PDU carries a data packet, the MAC protocol sublayer in the receiving equipment sends the data packet to the SDAP protocol sublayer in the receiving equipment; and the SDAP protocol sub-layer in the receiving equipment processes the received data packet and sends the processed data packet to an upper layer.

In a fifth aspect, an embodiment of the present invention further provides an apparatus for a MAC CE carrying a data packet, where the apparatus includes:

at least one processing unit and at least one memory unit, wherein the memory unit has stored program code which, when executed by the processing unit, causes the processing unit to perform the functions of the embodiments of the first aspect described above.

In a sixth aspect, an embodiment of the present invention further provides an apparatus for a MAC CE carrying a data packet, where the apparatus includes:

at least one processing unit and at least one memory unit, wherein the memory unit stores program code that, when executed by the processing unit, causes the processing unit to perform the functions of the embodiments of the second aspect described above.

Seventh aspect, a computer-storable medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above-described method.

In an eighth aspect, the present application further provides a computer storage medium having a computer program stored thereon, which when executed by a processor, performs the steps of the method of any one of the first to second aspects.

In addition, for technical effects brought by any one implementation manner of the third aspect to the eighth aspect, reference may be made to technical effects brought by different implementation manners of the first aspect to the second aspect, and details are not repeated here.

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 inventive labor.

Fig. 1 is a schematic diagram of a system structure of a MAC CE for carrying data packets according to an embodiment of the present invention;

FIG. 2 is a diagram of a data transmission apparatus according to an embodiment of the present invention;

fig. 3 is a schematic diagram of MAC CE type index for defining an uplink bearer data packet according to an embodiment of the present invention;

fig. 4 is a schematic diagram of MAC CE type index for defining a downlink bearer data packet according to an embodiment of the present invention;

FIG. 5 is a diagram illustrating an indication message added when a MAC PDU is of a non-fixed length according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating that a transmitting device transmits in a transparent transmission mode according to an embodiment of the present invention;

fig. 7 is a schematic diagram illustrating that a sending device sends in a direct connection mode according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a MAC CE carrying data packet obtained by parsing according to the embodiment of the present invention;

fig. 9 is a schematic diagram illustrating that the MAC CE does not carry a data packet according to the analysis of the embodiment of the present invention;

fig. 10 is a schematic diagram illustrating a receiving device transmitting in a transparent transmission mode according to an embodiment of the present invention;

fig. 11 is a schematic diagram illustrating that a receiving device transmits in a direct connection mode according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a MAC CE device for carrying a data packet according to a first embodiment of the present invention;

fig. 13 is a schematic structural diagram of a second MAC CE device for carrying a data packet according to the embodiment of the present invention;

fig. 14 is a schematic structural diagram of a third MAC CE device for carrying a data packet according to the embodiment of the present invention;

fig. 15 is a schematic structural diagram of a fourth MAC CE device for carrying a data packet according to the embodiment of the present invention;

fig. 16 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 17 is a schematic diagram of a first method for loading a MAC CE of a data packet according to an embodiment of the present invention;

fig. 18 is a diagram illustrating a second method for loading a MAC CE of a data packet according to a second embodiment of the present invention;

fig. 19 is a flowchart illustrating a method for loading a MAC CE of a data packet according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without any creative efforts shall fall within the protection scope of the embodiments of the present invention.

Some of the words that appear in the text are explained below:

(1) in the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

(2) "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

(3) The "terminal" referred to in the embodiments of the present invention refers to a terminal capable of supporting the MAC CE of the bearer packet.

(4) The "air interface" referred in the embodiments of the present invention refers to an interface between a mobile terminal (handset) and a base station, and generally refers to a protocol;

(5) the term "SDAP" in the embodiments of the present invention refers to the definition of service discovery application specification for service investigation. It is responsible for searching for known or specific services, and for some general service searching and browsing.

(7) The MAC PDU referred in the embodiment of the invention refers to a protocol data unit of an MAC layer, and consists of character strings which are arranged according to bytes (8 bits). When reading a plurality of character strings, the character strings are read from left to right and from top to bottom. One SDU is assembled into one MAC PDU in ascending bit order starting from the first bit.

(8) The transparent transmission mode in the embodiment of the present invention refers to transparent transmission, and refers to that the transparent transmission mode is only responsible for transmitting the transmitted content from the source address to the destination address, and does not change the content of the service data, regardless of the content of the transmitted service in the communication.

(9) The MAC protocol sub-layer according to the embodiment of the present invention provides an access method to a shared medium.

(10) The Packet Data Convergence Protocol (PDCP) referred in the embodiments of the present invention is a short for Packet Data Convergence Protocol. It is a radio transport protocol stack in UMTS that is responsible for compressing and decompressing IP headers, transmitting user data and maintaining sequence numbers of radio bearers set for lossless radio network service subsystems.

(11) The RLC (Radio Link Control) in the embodiment of the present invention refers to a Radio Link Control layer protocol in a wireless communication system. In WCDMA systems, the RLC protocol sublayer sits above the MAC layer and provides segmentation and retransmission services for user and control data.

(12) The "LCID (Logical Channel ID)" in the embodiments of the present invention is an integer used to set or return a property for specifying a local area or a certain area.

(13) The DRX (Discontinuous Reception) referred in the embodiments of the present invention is used for resource control of server virtualization.

(14) The Buffer Status Report (BSR) in the embodiment of the present invention refers to a Buffer Status Report process used for providing the serving eNB with information to be sent, which indicates how much data the UE has in common exists in an uplink Buffer.

As shown in fig. 1, an embodiment of the present invention provides a system for a MAC CE carrying a data packet, where the system includes:

the sending device 100 is configured to send a data packet to be sent to an MAC protocol sublayer in the sending device through an SDAP protocol sublayer; establishing MAC CE according to the received data packet through an MAC protocol sublayer, and establishing MACPDU according to the MAC CE; sending the MAC PDU through an air interface through an MAC protocol sublayer;

the receiving device 101 is configured to receive the MAC PDU through an air interface by the MAC protocol sublayer; after determining that the MAC CE in the MAC PDU carries a data packet, the MAC protocol sublayer sends the data packet to an SDAP protocol sublayer in receiving equipment; and processing the received data packet through the SDAP protocol sub-layer, and sending the processed data packet to an upper layer.

In the embodiment of the invention, in the process of data transmission, firstly, an SDAP protocol sublayer in sending equipment sends a data packet to be sent to an MAC protocol sublayer in the sending equipment, and the MAC protocol sublayer in the sending equipment constructs an MAC CE according to the received data packet and constructs an MAC PDU according to the MAC CE; and the MAC protocol sublayer in the sending equipment sends the MAC PDU through an air interface, then the MAC protocol sublayer in the receiving equipment receives the MAC PDU through the air interface, the MAC protocol sublayer in the receiving equipment sends the data packet to the SDAP protocol sublayer in the receiving equipment after determining that the MAC CE in the MAC PDU carries the data packet, and finally the SDAP protocol sublayer in the receiving equipment processes the received data packet and sends the processed data packet to an upper layer, so that the data packet is sent on a control channel, the bearing of the data packet is better saved, and the time delay and the system overhead are reduced.

By the method, the MAC protocol sublayer in the sending equipment constructs the MAC CE according to the received data packet, so that the MAC CE bears the data packet, the data packet is sent on the control channel, and the data packet bearing and channel establishing time delay can be saved by sending the data packet on the control channel.

As shown in fig. 2, the sending device in the embodiment of the present invention may be a terminal or a base station, and the receiving device may be a terminal or a base station.

Specifically, when uplink data transmission is performed, the sending device is a terminal, and the receiving device is a base station; when downlink data transmission is performed, the sending device is a base station, and the receiving device is a terminal.

The embodiment of the invention mainly realizes the data transmission by loading the data packet through the MAC CE, so a new MAC CE needs to be defined at first.

And the MAC protocol sub-layer in the sending equipment places index information used for representing transmission data in a subheader of the MAC PDU.

In the embodiment of the invention, the MAC CE type indexes (indexes) of uplink and downlink bearing data packets are respectively defined in the Table of the MAC CE of the MAC protocol. The specific values of the index can be planned in a unified way according to the protocol.

For example, as shown in fig. 3, an example of MAC CE type indexes defining an uplink bearer Packet in Table of a MAC CE is shown in the embodiment of the present invention, and it can be seen that an index corresponding to a Data Packet is AAAAAA. Meanwhile, for example, as shown in fig. 4, an example of MAC CE type indexes of downlink bearer packets defined in Table of MAC CE in the embodiment of the present invention is shown, and it can be seen that an index corresponding to a Data Packet is AAAAAA.

It should be noted that the above-mentioned manner is only an example, and any manner capable of defining MAC CE type indexes of uplink and downlink bearer packets is applicable to the embodiment of the present invention.

After a new MAC CE is defined, the MAC protocol sublayer in the transmitting device further needs to construct a MAC PDU according to the MAC CE.

Specifically, the MAC PDU is composed of a subheader and a MAC CE, and can be divided into a fixed length and a non-fixed length.

If the MAC PDU is of a non-fixed length, the MAC protocol sublayer in the sending device adds information indicating that the MAC PDU is of a non-fixed length to a subheader of the MAC PDU.

As shown in fig. 5, if the indication information for indicating the non-fixed length is set to L, if the MAC PDU is of the non-fixed length, and if the subheader of the MAC PDU is of the fixed length relative to the MAC PDU, the subheader of the MAC PDU is added with the indication information L for indicating that the MAC PDU is of the non-fixed length.

After the MAC CE successfully carries the data packet, in the data transmission process, the sending device and the receiving device need to cooperate to perform data transmission.

1. And a sending device.

Specifically, the SDAP protocol sub-layer in the sending device sends the data packet to be sent to the MAC protocol sub-layer in the sending device; the MAC protocol sub-layer in the sending equipment builds MAC CE according to the received data packet and builds MAC PDU according to the MAC CE; and the MAC protocol sub-layer in the sending equipment sends the MAC PDU through an air interface.

There are various ways for the SDAP protocol sublayer in the sending device to send the data packet to be sent to the MAC protocol sublayer in the sending device, which are listed below.

Transmission method 1: and transmitting in a transparent transmission mode.

Specifically, the SDAP protocol sublayer in the sending device transparently transmits the data packet to be sent to the MAC protocol sublayer in the sending device.

The transparent transmission refers to transparent transmission, and refers to that no change is made to the content of service data in the process that the SDAP protocol sub-layer in the sending device transmits the data packet to be sent to the MAC protocol sub-layer in the sending device.

Firstly, the SDAP protocol sublayer in the sending equipment sends a data packet to be sent to the PDCP protocol sublayer in the sending equipment; then, the PDCP protocol sublayer in the sending equipment directly sends the received PDCP SDU to the RLC protocol sublayer in a form of PDCP PDU; and finally, adding a function capable of transmitting DRB data packets in an RLC protocol sublayer in the sending equipment, and directly sending the received RLC SDU to an MAC protocol sublayer in a PDCP PDU mode.

As shown in fig. 6, when the sending device establishes the SDAP, it configures all the lower layers of the SDAP as transparent mode bearers simultaneously until the MAC layer.

For example, when the SDAP protocol sublayer in the sending device receives a data packet and sends the data packet to the MAC protocol sublayer in the sending device, because all lower layers of the SDAP are configured to be carried in the transparent transmission mode and the RLC protocol sublayer in the sending device can transmit the data packet in the transparent transmission mode, after the SDAP protocol sublayer in the sending device sends the data packet to be sent to the PDCP protocol sublayer in the sending device, the PDCP protocol sublayer in the sending device does not perform any processing on the data packet, meanwhile, parameters of the DRB established on the PDCP protocol sublayer in the sending device do not need any calculation, that is, a default blank value is adopted, the DRB passes the data packet through to the RLC protocol sublayer in the sending device, and finally, a function capable of transmitting the DRB data packet is added to the RLC protocol sublayer in the sending device, and directly transmits the received RLC SDU to the MAC protocol sublayer in the form of PDCP PDU.

By the method, when transmission is carried out, because the PDCP protocol sublayer in the sending equipment and the RLC protocol sublayer in the sending equipment do not carry out any processing on the data packet, and calculation is not needed when the PDCP protocol sublayer in the sending equipment establishes the DRB, the overhead of a system is better reduced, and the time delay is reduced.

Transmission method 2: and sending by adopting a direct connection mode.

Specifically, the SDAP protocol sublayer in the sending device directly sends the data packet to be sent to the MAC protocol sublayer in the sending device.

As shown in fig. 7, when the sending device establishes the SDAP, when there is data to be transmitted, the sending device does not establish the DRB.

In the conventional data transmission mode, each time data transmission is performed, a DRB is automatically established before the data transmission for performing the data transmission, and after the data transmission is finished, the DRB is automatically deleted.

In the embodiment of the invention, in order to better reduce time delay and system overhead, when data transmission is carried out by a data packet carried by the MAC CE, the DRB is not automatically established, and meanwhile, the SDAP protocol sub-layer is directly connected with the MAC protocol sub-layer.

For example, when the SDAP protocol sublayer in the sending device receives a data packet and sends the data packet to the MAC protocol sublayer in the sending device, the sending device does not automatically establish a DRB, and at the same time, because a direct connection mode is adopted, even if the SDAP protocol sublayer in the sending device is directly connected to the MAC protocol sublayer in the sending device, the data packet to be sent is directly sent to the MAC protocol sublayer in the sending device by the SDAP protocol sublayer in the sending device, and because intermediate transmission steps are reduced in data transmission, overhead of the system is better reduced, and delay is shortened.

2. And receiving the device.

Specifically, an MAC protocol sublayer in the receiving device receives an MAC PDU through an air interface; after determining that the MAC CE in the MAC PDU carries a data packet, the MAC protocol sublayer in the receiving equipment sends the data packet to the SDAP protocol sublayer in the receiving equipment; and the SDAP protocol sub-layer in the receiving equipment processes the received data packet and sends the processed data packet to an upper layer.

The MAC protocol sub-layer in the receiving device performs data transmission in different ways according to different carriers carrying data packets, and two ways are listed below.

1. The MAC CE carries the data packet.

For example, after determining that the MAC CE in the MAC PDU carries a data packet, the MAC protocol sublayer in the receiving device establishes a DRB in the transparent transmission mode in the PDCP/RLC, and then sends the data packet to the SDAP protocol sublayer in the receiving device in the transparent transmission mode, where the SDAP protocol sublayer in the receiving device processes the received data packet and sends the processed data packet to an upper layer.

2. The MAC CE carries no data packets.

For example, after determining that the MAC CE in the MAC PDU does not carry a data packet, the MAC protocol sublayer in the receiving device establishes a DRB in a normal mode in the PDCP protocol sublayer in the receiving device, and then the MAC protocol sublayer in the receiving device transmits the data packet to be transmitted to the SDAP protocol sublayer in the receiving device through the DRB in the normal mode, and the SDAP protocol sublayer in the receiving device processes the received data packet and transmits the processed data packet to an upper layer.

Wherein, whether the MAC CE carries a data packet can be judged by the following modes:

specifically, the receiving device determines whether index information for indicating transmission data exists in a subheader of the MAC PDU; and if so, determining that the MAC CE carries the data packet, otherwise, determining that the MAC CE does not carry the data packet.

For example, after receiving the MAC PDU through the air interface, the MAC protocol sublayer in the receiving device parses the MAC PDU, and if index information for indicating transmission data, such as AAAAA, is included in the parsed MAC PDU as shown in fig. 8, it is determined that the MAC CE carries a data packet. If the analyzed MAC PDU does not have index information indicating transmission data as shown in fig. 9, it is determined that the MAC CE does not carry a data packet.

There are various ways for the MAC protocol sublayer in the receiving device to send the received data packet to the SDAP sublayer in the receiving device, two of which are listed below.

Reception method 1: and transmitting in a transparent transmission mode.

Specifically, the MAC protocol sublayer in the receiving device transparently transmits the received data packet to the SDAP protocol sublayer in the receiving device.

The transparent transmission refers to transparent transmission, and refers to that no change is made to the content of service data in the process of transmitting the received data packet to the SDAP protocol sublayer in the receiving device by the MAC protocol sublayer in the receiving device.

Firstly, the MAC protocol sublayer in the receiving equipment sends a data packet to be sent to an RLC protocol sublayer in the receiving equipment; then, adding a function capable of transmitting a DRB data packet in an RLC protocol sublayer in the receiving device, and directly transmitting the received data packet to a PDCP protocol sublayer in the transmitting device; and finally, the PDCP protocol sublayer in the sending equipment directly sends the received data packet to the SDAP protocol sublayer in the sending equipment.

As shown in fig. 10, for example, when the MAC protocol sublayer in the receiving device receives the MAC PDU through an air interface, the MAC protocol sublayer in the receiving device analyzes the MAC PDU to obtain the MAC CE, determines that the MAC CE carries the data packet, and sends the data packet in the MAC CE to the SDAP protocol sublayer in the receiving device, because a pass-through mode is adopted, the MAC protocol sublayer in the receiving device sends the data packet to be sent to the RLC protocol sublayer in the sending device, the RLC protocol sublayer in the receiving device increases a function capable of transmitting the DRB data packet, and when the received data packet is directly sent to the PDCP protocol sublayer in the sending device, the PDCP protocol sublayer in the receiving device does not perform any processing on the data packet, and meanwhile, the parameter of the DRB established on the PDCP protocol sublayer in the receiving device does not need any calculation, that is, a default blank value is adopted, and finally, the DRB transparently transmits the data packet to the MAC protocol sublayer in the transmitting device.

By the method, when transmission is carried out, because the PDCP protocol sublayer in the receiving equipment and the RLC protocol sublayer in the sending equipment do not carry out any processing on the data packet, and calculation is not needed when the PDCP protocol sublayer in the receiving equipment establishes the DRB, the overhead of a system is better reduced, and the time delay is reduced.

Reception mode 2: and sending by adopting a direct connection mode.

Specifically, the MAC protocol sublayer in the receiving device directly sends the received data packet to the SDAP protocol sublayer in the receiving device.

As shown in fig. 11, for example, after the MAC protocol sublayer in the receiving device receives the MAC PDU through an air interface, the MAC protocol sublayer in the receiving device parses the MAC PDU to obtain the MAC CE, and when determining that the MAC CE carries the data packet and sends the data packet in the MAC CE to the SDAP protocol sublayer in the receiving device, the MAC protocol sublayer in the receiving device is directly connected to the SDAP protocol sublayer in the receiving device, so that the MAC protocol sublayer in the receiving device directly sends the data packet to be sent to the SDAP protocol sublayer in the receiving device, and because a middle transmission step is reduced in data transmission, the overhead of the system is better reduced, and the time delay is shortened.

As shown in fig. 12, an embodiment of the present invention provides an apparatus for a MAC CE carrying a data packet, including: processor 1200 and transceiver 1201:

the processor 1200 is configured to send, through the SDAP protocol sublayer, a data packet to be sent to an MAC protocol sublayer in the sending device; establishing an MAC CE according to the received data packet through an MAC protocol sublayer, and establishing an MAC PDU according to the MAC CE; and transmitting the MAC PDU through an air interface by the transceiver through the MAC protocol sub-layer.

Optionally, the processor 1200 is specifically configured to:

transmitting the data packet to be sent to an MAC protocol sub-layer in the sending equipment through an SDAP protocol sub-layer; or directly sending the data packet to be sent to the MAC protocol sub-layer in the sending equipment through the SDAP protocol sub-layer.

Optionally, the processor 1200 is specifically configured to:

sending a data packet to be sent to a PDCP protocol sublayer in the sending equipment through an SDAP protocol sublayer; directly sending the received PDCP SDU to an RLC protocol sublayer in a PDCP PDU form through the PDCP protocol sublayer; and sending the received RLC SDU to the MAC protocol sublayer directly in the form of RLC PDU through the RLC protocol sublayer.

Optionally, the processor 1200 is specifically configured to:

index information for representing transmission data is placed in a subheader of the MAC PDU through the MAC protocol sublayer.

Optionally, the processor 1200 is further configured to:

and if the MAC PDU is in a non-fixed length, adding information for indicating that the MAC PDU is in the non-fixed length in a subheader of the MAC PDU through an MAC protocol sub-layer.

As shown in fig. 13, the present invention provides an apparatus for carrying a MAC CE of a data packet, the apparatus comprising:

at least one processing unit 1300 and at least one memory unit 1301, wherein the memory unit stores program code which, when executed by the processing unit, causes the processing unit to perform the following:

sending the data packet to be sent to an MAC protocol sub-layer in sending equipment through an SDAP protocol sub-layer; establishing an MAC CE according to the received data packet through an MAC protocol sublayer, and establishing an MAC PDU according to the MAC CE; and transmitting the MAC PDU through an air interface by the transceiver through the MAC protocol sub-layer.

Optionally, the processing unit 1300 is specifically configured to:

transmitting the data packet to be sent to an MAC protocol sub-layer in the sending equipment through an SDAP protocol sub-layer; or

And directly sending the data packet to be sent to an MAC protocol sub-layer in the sending equipment through the SDAP protocol sub-layer.

Optionally, the processing unit 1300 is specifically configured to:

Optionally, the processing unit 1300 is further configured to:

As shown in fig. 14, an embodiment of the present invention provides an apparatus for a MAC CE carrying a data packet, including: processor 1400 and transceiver 1401:

the processor: the transceiver is used for receiving the MAC PDU through an air interface through the MAC protocol sub-layer; after determining that the MAC CE in the MAC PDU carries a data packet, the MAC protocol sublayer sends the data packet to an SDAP protocol sublayer in receiving equipment; and processing the received data packet through the SDAP protocol sub-layer, and sending the processed data packet to an upper layer.

Optionally, the processor 1400 is specifically configured to determine whether the MAC CE carries a data packet by the following method:

judging whether index information used for expressing transmission data exists in a subheader of the MAC PDU or not; and if so, determining that the MAC CE carries the data packet, otherwise, determining that the MAC CE does not carry the data packet.

Optionally, the processor 1400 is specifically configured to:

transmitting the data packet to be sent to an SDAP protocol sub-layer in the receiving equipment through an MAC protocol sub-layer; or directly sending the data packet to be sent to the SDAP protocol sub-layer in the receiving equipment through the MAC protocol sub-layer.

Optionally, the processor 1400 is specifically configured to:

sending a data packet to be sent to an RLC protocol sublayer in the receiving equipment through the MAC protocol sublayer; the received data packet is directly sent to a PDCP protocol sublayer in the sending equipment through an RLC protocol sublayer; and directly sending the received data packet to an SDAP (software development protocol access point) protocol sublayer in the sending equipment through a PDCP (packet data convergence protocol) protocol sublayer.

As shown in fig. 15, the present invention provides an apparatus for carrying a MAC CE of a data packet, including:

at least one processing unit 1500 and at least one storage unit 1501, wherein the storage unit stores program code that, when executed by the processing unit, causes the processing unit to perform the following:

receiving the MAC PDU through an air interface by a transceiver through an MAC protocol sub-layer; after determining that the MAC CE in the MAC PDU carries a data packet, the MAC protocol sublayer sends the data packet to an SDAP protocol sublayer in receiving equipment; and processing the received data packet through the SDAP protocol sub-layer, and sending the processed data packet to an upper layer.

Optionally, the processing unit 1500 is specifically configured to determine whether the MAC CE carries a data packet by the following method:

judging whether index information used for expressing transmission data exists in a subheader of the MAC PDU or not through an MAC protocol sublayer; and if so, determining that the MAC CE carries the data packet, otherwise, determining that the MAC CE does not carry the data packet.

Optionally, the processing unit 1500 is specifically configured to:

Based on the same concept, another terminal for carrying MAC CE of data packet is provided in the embodiment of the present invention, as shown in fig. 16, the terminal 1600 includes: radio Frequency (RF) circuitry 1610, a power supply 1620, a processor 1630, a memory 1640, an input unit 1650, a display unit 1660, a camera 1670, a communication interface 1690, and a wireless fidelity (WiFi) module 1690. Those skilled in the art will appreciate that the configuration of the terminal shown in fig. 16 is not intended to be limiting, and that the terminal provided by the embodiments of the present application may include more or less components than those shown, or some components may be combined, or a different arrangement of components may be provided.

The following describes the various components of the terminal 1600 in detail with reference to fig. 16:

the RF circuitry 1610 can be used for receiving and transmitting data during a communication or conversation. In particular, the RF circuit 1610 sends downlink data of the base station to the processor 930 for processing; and in addition, sending the uplink data to be sent to the base station. Generally, the RF circuitry 1610 includes, but is not limited to, an antenna, at least one Amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like.

In addition, the RF circuitry 1610 may also communicate with networks and other terminals via wireless communications. The wireless communication may use any communication standard or protocol, including but not limited to Global System for mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), and the like.

The WiFi technology belongs to a short-distance wireless transmission technology, and the terminal 1600 can Access an Access Point (AP) through the WiFi module 1690, thereby implementing Access to a data network. The WiFi module 1690 may be used for receiving and transmitting data during communication.

The terminal 1600 may be physically connected to other terminals via the communication interface 1690. Optionally, the communication interface 1690 is connected to the communication interfaces of the other terminals through cables, so as to implement data transmission between the terminal 900 and the other terminals.

In this embodiment of the application, the terminal 1600 can implement a communication service and send information to other contacts, so the terminal 1600 needs to have a data transmission function, that is, the terminal 1600 needs to include a communication module inside. Although fig. 16 illustrates communication modules such as the RF circuit 1610, the WiFi module 1690, and the communication interface 1690, it is to be understood that at least one of the above components or other communication modules (e.g., bluetooth module) for enabling communication exists in the terminal 1600 for data transmission.

For example, when the terminal 1600 is a mobile phone, the terminal 1600 may include the RF circuit 1610 and may also include the WiFi module 1690; when the terminal 1600 is a computer, the terminal 1600 may include the communication interface 1690 and may also include the WiFi module 1690; when the terminal 1600 is a tablet computer, the terminal 1600 may include the WiFi module.

The memory 1640 may be used to store software programs and modules. The processor 1630 executes various functional applications and data processing of the terminal 1600 by running the software programs and modules stored in the memory 1640, and when the processor 1630 executes the program codes in the memory 1640, part or all of the processes in fig. 17 according to the embodiments of the present invention can be implemented.

Alternatively, the memory 1640 may mainly include a program storage area and a data storage area. The storage program area can store an operating system, various application programs (such as communication application), a face recognition module and the like; the storage data area may store data (such as various multimedia files like pictures, video files, etc., and face information templates) created according to the use of the terminal, etc.

Further, the memory 1640 may comprise high speed random access memory and may also comprise non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The input unit 1650 may be used to receive numeric or character information input by a user and generate key signal inputs related to user settings and function control of the terminal 1600.

Optionally, the input unit 1650 may include a touch panel 1651 and other input terminals 1652.

The touch panel 1651, also called a touch screen, can collect touch operations of a user on or near the touch panel 1651 (for example, operations of a user on or near the touch panel 1651 by using any suitable object or accessory such as a finger or a stylus pen), and drive a corresponding connection device according to a preset program. Alternatively, the touch panel 1651 may include two portions of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 1630, and can receive and execute commands sent by the processor 1630. In addition, the touch panel 1651 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave.

Optionally, the other input terminals 1652 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.

The display unit 1660 may be used to display information input by or provided to the user as well as various menus of the terminal 1600. The display unit 1660 is a display system of the terminal 1600, and is configured to present an interface to implement human-computer interaction.

The display unit 1660 may include a display panel 1661. Alternatively, the Display panel 1661 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-emitting diode (OLED), or the like.

Further, the touch panel 1651 can cover the display panel 1661, and when the touch panel 1651 detects a touch operation on or near the touch panel 1651, the touch panel is transmitted to the processor 1630 to determine the type of the touch event, and then the processor 1630 provides a corresponding visual output on the display panel 1661 according to the type of the touch event.

Although in fig. 16 the touch panel 1651 and the display panel 1661 are implemented as two separate components to implement the input and output functions of the terminal 1600, in some embodiments the touch panel 1651 can be integrated with the display panel 1661 to implement the input and output functions of the terminal 1600.

The processor 1630 is a control center of the terminal 1600, connects various components using various interfaces and lines, and executes various functions and processes data of the terminal 1600 by running or executing software programs and/or modules stored in the memory 1640 and calling data stored in the memory 1640, thereby implementing various services based on the terminal.

Optionally, the processor 1630 may include one or more processing units. Optionally, the processor 1630 may integrate an application processor and a modem processor, wherein the application processor mainly handles operating systems, user interfaces, application programs, and the like, and the modem processor mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 1630.

The camera 1670 is configured to implement a shooting function of the terminal 1600 and shoot pictures or videos. The camera 1670 may also be used to implement a scanning function of the terminal 1600, and scan a scanned object (two-dimensional code/barcode).

The terminal 1600 also includes a power supply 1620 (e.g., a battery) for powering the various components. Optionally, the power supply 1620 may be logically connected to the processor 1630 through a power management system, so that the power management system may manage charging, discharging, power consumption, and the like.

Although not shown, the terminal 1600 may further include at least one sensor, an audio circuit, etc., which are not described herein.

Wherein memory 1640 may store the same program code as storage unit 1601, which when executed by processor 1630, causes processor 1630 to perform all of the functions of processing unit 1600.

An embodiment of the present invention further provides a non-volatile readable storage medium, which includes program code for causing a computing device to execute the steps of the method of MAC CE carrying data packet when the program code runs on the computing device.

Based on the same inventive concept, the embodiment of the present invention further provides a method for carrying the MAC CE of the data packet, and since the device corresponding to the method is the device for carrying the MAC CE of the data packet in the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the device, the implementation of the method can refer to the implementation of the system, and repeated details are omitted.

As shown in fig. 17, a method for a MAC CE carrying a data packet according to an embodiment of the present invention specifically includes the following steps:

1700, the SDAP protocol sub-layer in the sending device sends the data packet to be sent to the MAC protocol sub-layer in the sending device;

step 1701, the MAC protocol sublayer in the sending equipment builds MAC CE according to the received data packet and builds MAC PDU according to the MAC CE;

step 1702, the MAC protocol sublayer in the sending device sends the MAC PDU over an air interface.

Optionally, the sending device sends the data packet to be sent to the MAC protocol sublayer in the sending device by the SDAP protocol sublayer, including:

the SDAP protocol sub-layer in the sending equipment transmits the data packet to be sent to the MAC protocol sub-layer in the sending equipment through the DRB; or

And the SDAP protocol sub-layer in the sending equipment directly sends the data packet to be sent to the MAC protocol sub-layer in the sending equipment.

Optionally, the MAC protocol sublayer in the sending device constructs a MAC PDU according to the MAC CE, including;

Optionally, the MAC protocol sublayer in the sending device constructs a MAC PDU according to the MAC CE, and further includes:

and if the MAC PDU is in a non-fixed length, adding information for indicating that the MAC PDU is in the non-fixed length in a subheader of the MAC PDU by a MAC protocol sublayer in the sending equipment.

As shown in fig. 18, an embodiment of the present invention further provides a method for a MAC CE to carry a data packet, where the method includes:

1800, receiving the MAC PDU by an MAC protocol sublayer in the receiving equipment through an air interface;

step 1801, after determining that the MAC CE in the MAC PDU carries a data packet, the MAC protocol sublayer in the receiving device sends the data packet to the SDAP protocol sublayer in the receiving device;

step 1802, the SDAP protocol sub-layer in the receiving device processes the received data packet and sends the processed data packet to an upper layer.

Optionally, the MAC protocol sublayer in the receiving device determines whether the MAC CE carries a data packet by the following method:

the MAC protocol sub-layer in the receiving equipment judges whether index information used for representing transmission data exists in a subheader of the MAC PDU; and if so, determining that the MAC CE carries the data packet, otherwise, determining that the MAC CE does not carry the data packet.

Optionally, the sending, by the MAC protocol sublayer in the receiving device, the data packet to the SDAP protocol sublayer in the receiving device includes:

the MAC protocol sub-layer in the receiving equipment transmits the data packet to be sent to the SDAP protocol sub-layer in the receiving equipment through the DRB; or

And the MAC protocol sub-layer in the receiving equipment directly sends the data packet to be sent to the SDAP protocol sub-layer in the receiving equipment.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of the terminal and the base station as the execution subject. In order to implement the functions in the method provided by the embodiments of the present application, the terminal and the base station may include a hardware structure and/or a software module, and implement the functions in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

As shown in fig. 19, the method for carrying an MAC CE of a data packet according to the embodiment of the present invention includes the following steps, where a selected terminal is a sending device, a base station is a receiving device, and a transmission and reception selection transparent transmission mode is illustrated:

step 1900, the SDAP protocol sublayer in the sending device sends the data packet to be sent to the MAC protocol sublayer in the sending device;

step 1901, the SDAP protocol sublayer in the sending device transparently transmits the data packet to be sent to the MAC protocol sublayer in the sending device through the DRB;

step 1902: the MAC protocol sub-layer in the sending equipment sends the MAC PDU through an air interface;

step 1903: receiving the MAC PDU by an MAC protocol sublayer in the receiving equipment through an air interface;

step 1904: the MAC protocol sublayer in the receiving device determines whether index information for indicating transmission data exists in a subheader of the MAC PDU, if so, performs step 1905, and if not, performs step 1906;

step 1905: determining that the MAC CE carries a data packet by a MAC protocol sublayer in the receiving device, and executing step 1907;

step 1906: determining that the MAC CE does not carry a data packet by a MAC protocol sublayer in the receiving device, and executing step 1908;

step 1907: the MAC protocol sublayer in the receiving device transparently transmits the data packet to be transmitted to the SDAP protocol sublayer in the receiving device through the DRB, and performs step 1909;

step 1908: the MAC protocol sublayer in the receiving device transmits a data packet to be transmitted to the SDAP protocol sublayer in the receiving device through the DRB layer in the normal mode, and performs step 1909;

step 1909: and the SDAP protocol sub-layer in the receiving equipment processes the received data packet and sends the processed data packet to an upper layer.

The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, 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, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.

Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

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

1. A method of a media access control element, MAC CE, for carrying data packets, the method comprising:

a service data adaptation protocol SDAP protocol sub-layer in the sending equipment sends a data packet to be sent to a media access control MAC protocol sub-layer in the sending equipment;

the MAC protocol sublayer in the sending equipment constructs an MAC CE according to the received data packet and constructs a media access control protocol data unit (MAC PDU) according to the MAC CE;

and the MAC protocol sub-layer in the sending equipment sends the MAC PDU through an air interface.

2. The method of claim 1, wherein the SDAP protocol sub-layer in the sending device sends the data packet to be sent to the MAC protocol sub-layer in the sending device, and the method comprises:

the SDAP protocol sub-layer in the sending equipment transparently transmits the data packet to be sent to the MAC protocol sub-layer in the sending equipment; or

3. The method of claim 2, wherein the transmitting device's SDAP protocol sub-layer passes through the data packets to be transmitted to the transmitting device's MAC protocol sub-layer, comprising:

the SDAP protocol sublayer in the sending equipment sends a data packet to be sent to a Packet Data Convergence Protocol (PDCP) protocol sublayer in the sending equipment;

the PDCP protocol sublayer in the sending equipment directly sends the received PDCP SDU to a radio link control RLC protocol sublayer in a PDCP PDU form;

and the RLC protocol sublayer in the sending equipment directly sends the received RLC SDU to the MAC protocol sublayer in an RLC PDU form.

4. The method according to claim 1 or 2, wherein the MAC protocol sublayer in the transmitting device builds a MAC PDU according to the MAC CE, comprising:

and the MAC protocol sub-layer in the sending equipment places index information used for expressing the transmission data in a sub-part header file sub-header of the MAC PDU.

5. The method of claim 4, wherein the MAC protocol sublayer in the sending device builds MAC PDUs according to the MAC ces, further comprising:

6. A method of MAC CE for carrying data packets, the method comprising:

receiving the MAC PDU by an MAC protocol sublayer in the receiving equipment through an air interface;

after determining that the MAC CE in the MAC PDU carries a data packet, the MAC protocol sublayer in the receiving equipment sends the data packet to the SDAP protocol sublayer in the receiving equipment;

and the SDAP protocol sub-layer in the receiving equipment processes the received data packet and sends the processed data packet to an upper layer.

7. The method of claim 6, wherein the MAC protocol sublayer in the receiving device determines whether the MAC CE carries a packet by:

the MAC protocol sub-layer in the receiving equipment judges whether index information used for representing transmission data exists in a subheader of the MAC PDU;

and if so, determining that the MAC CE carries the data packet, otherwise, determining that the MAC CE does not carry the data packet.

8. The method of claim 6, wherein the MAC protocol sublayer in the receiving device sending the data packet to the SDAP protocol sublayer in the receiving device comprises:

the MAC protocol sub-layer in the receiving equipment transparently transmits the data packet to be sent to the SDAP protocol sub-layer in the receiving equipment; or

9. The method of claim 8, wherein the MAC protocol sub-layer in the receiving device passes through the data packets to be sent to the SDAP protocol sub-layer in the receiving device, comprising:

the MAC protocol sublayer in the receiving equipment sends a data packet to be sent to an RLC protocol sublayer in the receiving equipment;

the RLC protocol sublayer in the receiving equipment directly sends the received data packet to the PDCP protocol sublayer in the sending equipment;

and the PDCP protocol sublayer in the sending equipment directly sends the received data packet to the SDAP protocol sublayer in the sending equipment.

10. An apparatus of a MAC CE for carrying data packets, comprising: a processor and a transceiver:

the processor is used for sending the data packet to be sent to the MAC protocol sub-layer in the sending equipment through the SDAP protocol sub-layer; establishing an MAC CE according to the received data packet through an MAC protocol sublayer, and establishing an MAC PDU according to the MAC CE; and transmitting the MAC PDU through an air interface by the transceiver through the MAC protocol sub-layer.

11. The device of claim 10, wherein the processor is specifically configured to:

12. The device of claim 11, wherein the processor is specifically configured to:

13. The device of claim 10 or 11, wherein the processor is specifically configured to:

14. The device of claim 13, wherein the processor is further configured to:

15. An apparatus of a MAC CE for carrying data packets, comprising: a processor and a transceiver:

the processor is used for receiving the MAC PDU through an air interface by the transceiver through the MAC protocol sub-layer; after determining that the MAC CE in the MAC PDU carries a data packet, the MAC protocol sublayer sends the data packet to an SDAP protocol sublayer in receiving equipment; and processing the received data packet through the SDAP protocol sub-layer, and sending the processed data packet to an upper layer.

16. The device of claim 15, wherein the processor is specifically configured to determine whether the MAC CE carries a packet by:

17. The device of claim 15, wherein the processor is specifically configured to:

18. The device of claim 17, wherein the processor is specifically configured to:

19. An apparatus for carrying a MAC CE of a packet, the apparatus comprising: at least one processing unit and at least one memory unit, wherein the memory unit stores program code which, when executed by the processing unit, causes the processing unit to perform the steps of the method of any of claims 1 to 5 or the steps of the method of any of claims 6 to 9.

20. A computer-readable medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 5 or the steps of the method according to any one of claims 6 to 9.